subject:(magnetic bearing)

Sardar Patel University

1. Shukla, Snehalkumar Dineshchandra. Rough bearing lubricated with magnetic fluid; -.

Degree: Mathematics, 2013, Sardar Patel University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/34808

None

Bibliography p.166-187

Advisors/Committee Members: Deheri, G M.

Subjects/Keywords: bearing; magnetic fluid

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APA (6^th Edition):

Shukla, S. D. (2013). Rough bearing lubricated with magnetic fluid; -. (Thesis). Sardar Patel University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/34808

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shukla, Snehalkumar Dineshchandra. “Rough bearing lubricated with magnetic fluid; -.” 2013. Thesis, Sardar Patel University. Accessed March 08, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/34808.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shukla, Snehalkumar Dineshchandra. “Rough bearing lubricated with magnetic fluid; -.” 2013. Web. 08 Mar 2021.

Vancouver:

Shukla SD. Rough bearing lubricated with magnetic fluid; -. [Internet] [Thesis]. Sardar Patel University; 2013. [cited 2021 Mar 08]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34808.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shukla SD. Rough bearing lubricated with magnetic fluid; -. [Thesis]. Sardar Patel University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34808

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan Technological University

2. Tresnak, Jake. Rock Magnetic Investigation of the Michigan Basin Soils and Sediments Overlying the Oil-Bearing Silurian Pinnacle Reefs.

Degree: MS, Department of Geological and Mining Engineering and Sciences, 2017, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etdr/471

► A relationship between the hydrocarbon migration and magnetic properties of near-surface sediments was investigated from several hundreds of samples collected over the hydrocarbon-bearing Silurian… (more)

Subjects/Keywords: Oil-Bearing; Rock Magnetic; Magnetic Susceptibility; Biogeochemistry; Geochemistry; Geology; Geophysics and Seismology; Soil Science

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APA (6^th Edition):

Tresnak, J. (2017). Rock Magnetic Investigation of the Michigan Basin Soils and Sediments Overlying the Oil-Bearing Silurian Pinnacle Reefs. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etdr/471

Chicago Manual of Style (16^th Edition):

Tresnak, Jake. “Rock Magnetic Investigation of the Michigan Basin Soils and Sediments Overlying the Oil-Bearing Silurian Pinnacle Reefs.” 2017. Masters Thesis, Michigan Technological University. Accessed March 08, 2021. https://digitalcommons.mtu.edu/etdr/471.

MLA Handbook (7^th Edition):

Tresnak, Jake. “Rock Magnetic Investigation of the Michigan Basin Soils and Sediments Overlying the Oil-Bearing Silurian Pinnacle Reefs.” 2017. Web. 08 Mar 2021.

Vancouver:

Tresnak J. Rock Magnetic Investigation of the Michigan Basin Soils and Sediments Overlying the Oil-Bearing Silurian Pinnacle Reefs. [Internet] [Masters thesis]. Michigan Technological University; 2017. [cited 2021 Mar 08]. Available from: https://digitalcommons.mtu.edu/etdr/471.

Council of Science Editors:

Tresnak J. Rock Magnetic Investigation of the Michigan Basin Soils and Sediments Overlying the Oil-Bearing Silurian Pinnacle Reefs. [Masters Thesis]. Michigan Technological University; 2017. Available from: https://digitalcommons.mtu.edu/etdr/471

Texas A&M University

3. Li, Xiaojun. Design and Development of a Next Generation Energy Storage Flywheel.

Degree: PhD, Mechanical Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/188891

► Energy storage is crucial for both smart grids and renewable energy sources such as wind or solar, which are intermittent in nature. Compared to electrochemical… (more)

▼ Energy storage is crucial for both smart grids and renewable energy sources such as wind or solar, which are intermittent in nature. Compared to electrochemical batteries, flywheel energy storage systems (FESSs) offer many unique benefits such as low environmental impact, high power quality, and larger life cycles. This dissertation presents the design and development of a novel utility-scale FESS that features a shaftless, hubless rotor. The unique shaftless design gives it the potential of a doubled energy density and a compact form factor. Its energy and power capacities are 100 kWh and 100 kW, respectively. The flywheel is made of high-strength steel, which makes it much easier to manufacture, assemble, and recycle. Steels also cost much less than composite materials. In addition, the system incorporates a new combination active magnetic bearing. Its working principle and the levitation control for the flywheel are presented. The development of an integrated, coreless, permanent-magnet (PM) motor/generator for the flywheel is briefly discussed as well. Initial test results show that the magnetic bearing provides stable levitation for the 5443-kg flywheel with small current consumptions. Furthermore, this dissertation formulates and synthesizes a detailed model for designing and simulating a closed-loop control system for the proposed flywheel system at high speed. To this end, the magnetic bearing supporting structure is considered flexible and modeled by finite element modeling. The magnetic bearing is characterized experimentally by static and frequency-dependent coefficients, the latter of which are caused by eddy current effects and presents challenges to the levitation control. Sensor- runout disturbances are measured and included in the model. System nonlinearities in power amplifiers and the controller are considered as well. Even though the flywheel has a large ratio of the primary-to-transversal moment of inertias, Multi-Input-Multi-Output (MIMO) feedback control demonstrates its effectiveness in canceling gyroscopic torques and stabilize the system. Various stages of PD controllers, lead/lag compensators, and notch filters are also implemented to suppress the high-frequency sensor disturbances and structural vibrations. Advisors/Committee Members: Palazzolo, Alan (advisor), Toliyat, Hamid (committee member), Rasmussen, Bryan (committee member), Suh, Steve (committee member).

Subjects/Keywords: Flywheel; Battery; Magnetic Bearing; Magnetic Levitation; Energy Storage; Vibration Control; System Identification; Stress

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APA (6^th Edition):

Li, X. (2018). Design and Development of a Next Generation Energy Storage Flywheel. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/188891

Chicago Manual of Style (16^th Edition):

Li, Xiaojun. “Design and Development of a Next Generation Energy Storage Flywheel.” 2018. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/188891.

MLA Handbook (7^th Edition):

Li, Xiaojun. “Design and Development of a Next Generation Energy Storage Flywheel.” 2018. Web. 08 Mar 2021.

Vancouver:

Li X. Design and Development of a Next Generation Energy Storage Flywheel. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/188891.

Council of Science Editors:

Li X. Design and Development of a Next Generation Energy Storage Flywheel. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/188891

North-West University

4. Combrinck, Angelique. Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck .

Degree: 2010, North-West University

URL: http://hdl.handle.net/10394/4457

► The School of Electrical, Electronic and Computer Engineering at the North-West University in Potchefstroom has established an active magnetic bearing (AMB) research group called McTronX.… (more)

▼ The School of Electrical, Electronic and Computer Engineering at the North-West University in Potchefstroom has established an active magnetic bearing (AMB) research group called McTronX. This group provides extensive knowledge and experience in the theory and application of AMBs. By making use of the expertise contained within McTronX and the rest of the control engineering community, an adaptive controller for an AMB flywheel system is implemented. The adaptive controller is faced with many challenges because AMB systems are multivariable, nonlinear, dynamic and inherently unstable systems. It is no wonder that existing AMB models are poor approximations of reality. This modelling problem is avoided because the adaptive controller is based on an indirect adaptive control law. Online system identification is performed by a neural network to obtain a better model of the AMB flywheel system. More specifically, a nonlinear autoregressive with exogenous inputs (NARX) neural network is implemented as an online observer. Changes in the AMB flywheel system’s environment also add uncertainty to the control problem. The adaptive controller adjusts to these changes as opposed to a robust controller which operates despite the changes. Making use of reinforcement learning because no online training data can be obtained, an adaptive critic model is applied. The adaptive controller consists of three neural networks: a critic, an actor and an observer. It is called an observer-based adaptive critic neural controller (ACNC). Genetic algorithms are used as global optimization tools to obtain values for the parameters of the observer, critic and actor. These parameters include the number of neurons and the learning rate for each neural network. Since the observer uses a different error signal than the actor and critic, its parameters are optimized separately. When the actor and critic parameters are optimized by minimizing the tracking error, the observer parameters are kept constant. The chosen adaptive control design boasts analytical proofs of stability using Lyapunov stability analysis methods. These proofs clearly confirm that the design ensures stable simultaneous identification and tracking of the AMB flywheel system. Performance verification is achieved by step response, robustness and stability analysis. The final adaptive control system remains stable in the presence of severe cross-coupling effects whereas the original decentralized PD control system destabilizes. This study provides the justification for further research into adaptive control using artificial intelligence techniques as applied to the AMB flywheel system.

Subjects/Keywords: Adaptive control; Active magnetic bearing; Neural network; System identification

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APA (6^th Edition):

Combrinck, A. (2010). Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck . (Thesis). North-West University. Retrieved from http://hdl.handle.net/10394/4457

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Combrinck, Angelique. “Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck .” 2010. Thesis, North-West University. Accessed March 08, 2021. http://hdl.handle.net/10394/4457.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Combrinck, Angelique. “Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck .” 2010. Web. 08 Mar 2021.

Vancouver:

Combrinck A. Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck . [Internet] [Thesis]. North-West University; 2010. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10394/4457.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Combrinck A. Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck . [Thesis]. North-West University; 2010. Available from: http://hdl.handle.net/10394/4457

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Uppsala University

5. Girlevicius, Lukas. Active magnetic bearing driver circuit design featuring current measurement integration.

Degree: Electricity, 2015, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269215

► Researchers at Uppsala University are developing a flywheel energy storage device intended to be used in electrical vehicles. Kinetic energy storage technology has potential… (more)

Subjects/Keywords: active magnetic bearing; current measurement; integration; current loop signal

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APA (6^th Edition):

Girlevicius, L. (2015). Active magnetic bearing driver circuit design featuring current measurement integration. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269215

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Girlevicius, Lukas. “Active magnetic bearing driver circuit design featuring current measurement integration.” 2015. Thesis, Uppsala University. Accessed March 08, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269215.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Girlevicius, Lukas. “Active magnetic bearing driver circuit design featuring current measurement integration.” 2015. Web. 08 Mar 2021.

Vancouver:

Girlevicius L. Active magnetic bearing driver circuit design featuring current measurement integration. [Internet] [Thesis]. Uppsala University; 2015. [cited 2021 Mar 08]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269215.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Girlevicius L. Active magnetic bearing driver circuit design featuring current measurement integration. [Thesis]. Uppsala University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269215

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

6. Petrušek, Marek. Realizace hardware laboratorního testovacího přípravku pro aktivní magnetické ložisko: Realisation of the laboratory test instrument hardware for active magnetic bearing.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/25278

► The work is focused on the designing the active magnetic bearing and the construction of its fixing system. Hardware is designed to control the active… (more)

Subjects/Keywords: Aktivní magnetické ložisko; měření polohy; Active magnetic bearing; situation measurement

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APA (6^th Edition):

Petrušek, M. (2019). Realizace hardware laboratorního testovacího přípravku pro aktivní magnetické ložisko: Realisation of the laboratory test instrument hardware for active magnetic bearing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/25278

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Petrušek, Marek. “Realizace hardware laboratorního testovacího přípravku pro aktivní magnetické ložisko: Realisation of the laboratory test instrument hardware for active magnetic bearing.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/25278.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Petrušek, Marek. “Realizace hardware laboratorního testovacího přípravku pro aktivní magnetické ložisko: Realisation of the laboratory test instrument hardware for active magnetic bearing.” 2019. Web. 08 Mar 2021.

Vancouver:

Petrušek M. Realizace hardware laboratorního testovacího přípravku pro aktivní magnetické ložisko: Realisation of the laboratory test instrument hardware for active magnetic bearing. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/25278.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Petrušek M. Realizace hardware laboratorního testovacího přípravku pro aktivní magnetické ložisko: Realisation of the laboratory test instrument hardware for active magnetic bearing. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/25278

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

7. Jabben, L. Mechatronic design of a magnetically suspended rotating platform.

Degree: 2007, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178

Subjects/Keywords: mechatronic design; active magnetic bearing

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APA (6^th Edition):

Jabben, L. (2007). Mechatronic design of a magnetically suspended rotating platform. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178

Chicago Manual of Style (16^th Edition):

Jabben, L. “Mechatronic design of a magnetically suspended rotating platform.” 2007. Doctoral Dissertation, Delft University of Technology. Accessed March 08, 2021. http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178.

MLA Handbook (7^th Edition):

Jabben, L. “Mechatronic design of a magnetically suspended rotating platform.” 2007. Web. 08 Mar 2021.

Vancouver:

Jabben L. Mechatronic design of a magnetically suspended rotating platform. [Internet] [Doctoral dissertation]. Delft University of Technology; 2007. [cited 2021 Mar 08]. Available from: http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178.

Council of Science Editors:

Jabben L. Mechatronic design of a magnetically suspended rotating platform. [Doctoral Dissertation]. Delft University of Technology; 2007. Available from: http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; urn:NBN:nl:ui:24-uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178 ; http://resolver.tudelft.nl/uuid:d2f37bb8-99c8-4cb9-9f97-ab28a807a178

University of Kentucky

8. Steele, Barrett Alan. DESIGN OF A LORENTZ, SLOTLESS SELF-BEARING MOTOR FOR SPACE APPLICATIONS.

Degree: 2003, University of Kentucky

URL: https://uknowledge.uky.edu/gradschool_theses/306

► The harsh conditions of space, the stringent requirements for orbiting devices, and the increasing precision pointing requirements of many space applications demand an actuator that… (more)

Subjects/Keywords: Self-bearing Motor; Precision Pointing; Lorentz; Space; Magnetic Bearing

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APA (6^th Edition):

Steele, B. A. (2003). DESIGN OF A LORENTZ, SLOTLESS SELF-BEARING MOTOR FOR SPACE APPLICATIONS. (Masters Thesis). University of Kentucky. Retrieved from https://uknowledge.uky.edu/gradschool_theses/306

Chicago Manual of Style (16^th Edition):

Steele, Barrett Alan. “DESIGN OF A LORENTZ, SLOTLESS SELF-BEARING MOTOR FOR SPACE APPLICATIONS.” 2003. Masters Thesis, University of Kentucky. Accessed March 08, 2021. https://uknowledge.uky.edu/gradschool_theses/306.

MLA Handbook (7^th Edition):

Steele, Barrett Alan. “DESIGN OF A LORENTZ, SLOTLESS SELF-BEARING MOTOR FOR SPACE APPLICATIONS.” 2003. Web. 08 Mar 2021.

Vancouver:

Steele BA. DESIGN OF A LORENTZ, SLOTLESS SELF-BEARING MOTOR FOR SPACE APPLICATIONS. [Internet] [Masters thesis]. University of Kentucky; 2003. [cited 2021 Mar 08]. Available from: https://uknowledge.uky.edu/gradschool_theses/306.

Council of Science Editors:

Steele BA. DESIGN OF A LORENTZ, SLOTLESS SELF-BEARING MOTOR FOR SPACE APPLICATIONS. [Masters Thesis]. University of Kentucky; 2003. Available from: https://uknowledge.uky.edu/gradschool_theses/306

9. Φαρμακόπουλος, Μιχαήλ. Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού).

Degree: 2015, University of Patras

URL: http://hdl.handle.net/10889/8525

►

Η παρούσα διδακτορική διατριβή αναφέρεται σε έδρανα ολίσθησης. Συγκεκριμένα, αναφέρεται στο σχεδιασμό και την κατασκευή ενός νέου, πρωτότυπου υβριδικού εδράνου ολίσθησης, το οποίο έχει τη… (more)

▼

Η παρούσα διδακτορική διατριβή αναφέρεται σε έδρανα ολίσθησης. Συγκεκριμένα, αναφέρεται στο σχεδιασμό και την κατασκευή ενός νέου, πρωτότυπου υβριδικού εδράνου ολίσθησης, το οποίο έχει τη δυνατότητα να λειτουργεί είτε ως υδροδυναμικό, είτε ως ενεργό ηλεκτρομαγνητικό, είτε ως υβριδικό, δηλαδή υδροδυναμικό και ενεργό ηλεκτρομαγνητικό ταυτόχρονα. Προκειμένου να πραγματοποιηθεί ο σχεδιασμός και η κατασκευή του συγκεκριμένου υβριδικού εδράνου ολίσθησης, έγιναν υπολογισμοί και προσομοίωση του υδροδυναμικού πεδίου για τα υδροδυναμικά έδρανα ολίσθησης και του ηλεκτρομαγνητικού πεδίου για τα ηλεκτρομαγνητικά έδρανα στο πρόγραμμα ANSYS. Η προσομοίωση των υβριδικών εδράνων ολίσθησης έγινε με επαναληπτική διαδικασία μεταξύ του υδροδυναμικού και του ηλεκτρομαγνητικού πεδίου προκειμένου να υπολογίζεται το κάθε επιθυμητό μέγεθος. Για το σχεδιασμό του υβριδικού εδράνου ολίσθησης χρησιμοποιήθηκε το σχεδιαστικό πρόγραμμα CATIA. Για την προσομοίωση του ελέγχου του υβριδικού εδράνου ολίσθησης, χρησιμοποιήθηκε το πρόγραμμα Matlab, το οποίο ενεργοποιεί το πρόγραμμα Ansys για τον υπολογισμό των χαρακτηριστικών του υδροδυναμικού και του ηλεκτρομαγνητικού πεδίου του εδράνου και το Simulink module του Matlab για τον υπολογισμό των χαρακτηριστικών του ελέγχου, ώστε να γίνονται όλοι οι απαραίτητοι υπολογισμοί αυτοματοποιημένα. Τέλος, έγιναν υπολογισμοί και προσομοίωση δυναμικής περιστρεφόμενων αξόνων, με στήριξη του ρότορα σε δύο έδρανα και δίσκο προσαρμοσμένο στον ρότορα, στο πρόγραμμα Matlab, με σύνδεση με το Ansys για τον υπολογισμό των συντελεστών ελαστικότητας και απόσβεσης και το Simulink module του Matlab για τον υπολογισμό των χαρακτηριστικών του ελέγχου, με σκοπό την ολοκληρωμένη ανάλυση του συστήματος. Συμπερασματικά, μέσω της συγκεκριμένης διδακτορικής διατριβής αποδεικνύεται πως ο σχεδιασμός, η λειτουργία και η κατασκευή του συγκεκριμένου πρωτότυπου υβριδικού εδράνου ολίσθησης είναι εφικτά, και από τα αποτελέσματα προκύπτει πως η λειτουργία ενός τέτοιου υβριδικού εδράνου ολίσθησης, έχει πολλά πλεονεκτήματα σε σχέση με άλλα έδρανα στήριξης περιστρεφόμενων αξόνων, είτε αυτά είναι απλά είτε υβριδικά και μπορεί να εφαρμοστεί είτε σε εργαστηριακό επίπεδο είτε σε βιομηχανικές εφαρμογές.

The present doctoral thesis refers to hydrodynamic journal bearings. Specifically, it refers to the design and construction of a new, innovative hybrid journal bearing, which has the ability to function either as hydrodynamic or active magnetic or hybrid, i.e. both hydrodynamic and active magnetic, at the same time. In order to be performed the design and construction of the specific hybrid journal bearing, calculations and simulation of the hydrodynamic field for the hydrodynamic journal bearings in the program ANSYS, have been made. The simulation of the hybrid journal bearings has been made with iterative process, between the hydrodynamic and active magnetic field, so that every desired magnitude can be calculated. For the design of the hybrid journal bearing, the designing program CATIA has been used. For the simulation of the control of…

Advisors/Committee Members: Παπαδόπουλος, Χρήστος, Farmakopoulos, Michael, Παπαδόπουλος, Χρήστος, Νικολακόπουλος, Παντελής, Κούσουλας, Νικόλαος, Ανυφαντής, Νικόλαος, Μιχαηλίδης, Αθανάσιος, Τζες, Αντώνιος, Παπαδόπουλος, Χρήστος.

Subjects/Keywords: Υδροδυναμικά έδρανα ολίσθησης; Ενεργά ηλεκτρομαγνητικά έδρανα; Υβριδικά έδρανα; Ελεγκτής PID; 621.822; Hydrodynamic journal bearing; Active magnetic bearing; Hybrid bearing; CATIA; Ansys; Matlab; Simulink; PID control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Φαρμακόπουλος, �. (2015). Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού). (Doctoral Dissertation). University of Patras. Retrieved from http://hdl.handle.net/10889/8525

Chicago Manual of Style (16^th Edition):

Φαρμακόπουλος, Μιχαήλ. “Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού).” 2015. Doctoral Dissertation, University of Patras. Accessed March 08, 2021. http://hdl.handle.net/10889/8525.

MLA Handbook (7^th Edition):

Φαρμακόπουλος, Μιχαήλ. “Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού).” 2015. Web. 08 Mar 2021.

Vancouver:

Φαρμακόπουλος �. Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού). [Internet] [Doctoral dissertation]. University of Patras; 2015. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10889/8525.

Council of Science Editors:

Φαρμακόπουλος �. Σχεδιασμός υβριδικού εδράνου ολίσθησης (υδροδυναμικού - ηλεκτρομαγνητικού). [Doctoral Dissertation]. University of Patras; 2015. Available from: http://hdl.handle.net/10889/8525

Brno University of Technology

10. Pruša, Radomír. Návrh magnetického ložiska pro čerpadlo: Design of magnetic bearing for pump.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/61506

► The aim of this thesis is to design a magnetic bearing system for a pump. The use of magnetic bearings is based on the necessity… (more)

Subjects/Keywords: aktivní magnetické ložisko; elektromagnetizmus; magnetizmus; metoda konečných prvků; pasivní magnetické ložisko; active magnetic bearing; electromagnetism; finite element method; magnetism; passive magnetic bearing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pruša, R. (2019). Návrh magnetického ložiska pro čerpadlo: Design of magnetic bearing for pump. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/61506

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pruša, Radomír. “Návrh magnetického ložiska pro čerpadlo: Design of magnetic bearing for pump.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/61506.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pruša, Radomír. “Návrh magnetického ložiska pro čerpadlo: Design of magnetic bearing for pump.” 2019. Web. 08 Mar 2021.

Vancouver:

Pruša R. Návrh magnetického ložiska pro čerpadlo: Design of magnetic bearing for pump. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/61506.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pruša R. Návrh magnetického ložiska pro čerpadlo: Design of magnetic bearing for pump. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/61506

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

11. Clements, Joshua Ryan. The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation.

Degree: MS, Mechanical Engineering, 2000, Virginia Tech

URL: http://hdl.handle.net/10919/35827

► Active Magnetic Bearings (AMB) are a relatively recent innovation in bearing technology. Unlike conventional bearings, which rely on mechanical forces originating from fluid films or… (more)

▼ Active Magnetic Bearings (AMB) are a relatively recent innovation in bearing technology. Unlike conventional bearings, which rely on mechanical forces originating from fluid films or physical contact to support bearing loads, AMB systems utilize magnetic fields to levitate and support a shaft in an air-gap within the bearing stator. This design has many benefits over conventional bearings. The potential capabilities that AMB systems offer are allowing this new technology to be considered for use in state-of-the-art applications. For example, AMB systems are being considered for use in jet engines, submarine propulsion systems, energy storage flywheels, hybrid electric vehicles and a multitude of high performance space applications. Many of the benefits that AMB systems have over conventional bearings makes them ideal for use in these types of vehicular applications. However, these applications present a greater challenge to the AMB system designer because the AMB-rotor system may be subjected to external vibrations originating from the vehicle's motion and operation. Therefore these AMB systems must be designed to handle the aggregate vibration of both the internal rotor dynamic vibrations and the external vibrations that these applications will produce. This paper will focus on the effects of direct base excitation to an AMB/rotor system because base excitation is highly possible to occur in vehicular applications. This type of excitation has been known to de-stabilize AMB/rotor systems therefore this aspect of AMB system operation needs to be examined. The goal of this research was to design, build and test a test rig that has the ability to excite an AMB system with large amplitude base excitation. Results obtained from this test rig will be compared to predictions obtained from linear models commonly used for AMB analysis and determine the limits of these models. Advisors/Committee Members: Kasarda, Mary E. F. (committeechair), Wicks, Alfred L. (committee member), Kirk, R. Gordon (committee member).

Subjects/Keywords: Magnetic Bearing Equivalent Stiffness and Damping; Magnetic Bearing Base Excitation Modeling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Clements, J. R. (2000). The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/35827

Chicago Manual of Style (16^th Edition):

Clements, Joshua Ryan. “The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation.” 2000. Masters Thesis, Virginia Tech. Accessed March 08, 2021. http://hdl.handle.net/10919/35827.

MLA Handbook (7^th Edition):

Clements, Joshua Ryan. “The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation.” 2000. Web. 08 Mar 2021.

Vancouver:

Clements JR. The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation. [Internet] [Masters thesis]. Virginia Tech; 2000. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10919/35827.

Council of Science Editors:

Clements JR. The Experimental Testing of an Active Magnetic Bearing/Rotor System Undergoing Base Excitation. [Masters Thesis]. Virginia Tech; 2000. Available from: http://hdl.handle.net/10919/35827

UCLA

12. Kang, Christopher. Control of an Active Magnetic Bearing-Rotor System.

Degree: Mechanical Engineering, 2014, UCLA

URL: http://www.escholarship.org/uc/item/3hn6f536

► A common disturbance encountered in rotor operations is the sinusoidal disturbance caused by mass unbalance. This natural phenomenon imparts a force on the rotor with… (more)

Subjects/Keywords: Mechanical engineering; active magnetic bearing; internal model; plug-in control; repetitive control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kang, C. (2014). Control of an Active Magnetic Bearing-Rotor System. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/3hn6f536

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kang, Christopher. “Control of an Active Magnetic Bearing-Rotor System.” 2014. Thesis, UCLA. Accessed March 08, 2021. http://www.escholarship.org/uc/item/3hn6f536.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kang, Christopher. “Control of an Active Magnetic Bearing-Rotor System.” 2014. Web. 08 Mar 2021.

Vancouver:

Kang C. Control of an Active Magnetic Bearing-Rotor System. [Internet] [Thesis]. UCLA; 2014. [cited 2021 Mar 08]. Available from: http://www.escholarship.org/uc/item/3hn6f536.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kang C. Control of an Active Magnetic Bearing-Rotor System. [Thesis]. UCLA; 2014. Available from: http://www.escholarship.org/uc/item/3hn6f536

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. Antunes, Pedro Ivo Teixeira de Carvalho. Medição de posição de rotor em mancal magnético através de sensor Hall.

Degree: Mestrado, Engenharia de Controle e Automação Mecânica, 2012, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3152/tde-10062013-152331/ ;

►

A Escola Politécnica da Universidade de São Paulo (EPUSP, Brasil) e o Instituto Dante Pazzanese de Cardiologia (IDPC, Brasil) estão desenvolvendo conjuntamente um Dispositivo de… (more)

▼

A Escola Politécnica da Universidade de São Paulo (EPUSP, Brasil) e o Instituto Dante Pazzanese de Cardiologia (IDPC, Brasil) estão desenvolvendo conjuntamente um Dispositivo de Assistência Ventricular (DAV) baseado numa bomba de vazão mista e utilizando mancais magnéticos que objetivem substituir os mancais convencionais, pois o uso de mancal magnético neste dispositivo minimiza a hemólise e melhora o tempo de vida do DAV, isso em razão da ausência e contato de um mancal com a crase sanguínea o que, por fim, aumenta a vida útil do dispositivo. O mancal magnético utilizado para o DAV será o mancal do tipo híbrido. Este tipo de mancal combina ímãs permanentes com eletroímãs para realizar a levitação do rotor com controle apenas na direção axial do rotor. Na configuração original desse mancal magnético, um sensor indutivo detecta a posição axial do rotor. Esta posição é enviada a um controlador do tipo PID e processada, amplificada e enviada aos atuadores eletromagnéticos. A corrente enviada aos eletroímãs é controlada de maneira a manter o rotor sempre em uma posição axial fixa. No entanto, essa configuração exige o uso de um atuador eletromagnético contendo um furo para a instalação do sensor indutivo, impondo limitações no desempenho do atuador. Além disso, o sensor indutivo limita a miniaturização do mancal. Assim, para minimizar as limitações impostas pelo uso do sensor indutivo, este trabalho faz, primeiramente, um levantamento das diversas técnicas conhecidas para a medição da posição do rotor em mancais magnéticos. Como resultado, este trabalho identifica o uso do sensor Hall como a alternativa mais promissora. Este sensor responde à magnitude de um campo magnético que nele é aplicado. Fixando-se um ímã permanente ao rotor, obtém-se uma saída no sensor Hall proporcional ao deslocamento do rotor. Contudo, a leitura do sensor Hall é afetada ainda pelo campo magnético gerado pelos atuadores eletromagnéticos, o que é indesejável. Buscando minimizar essa influência, este trabalho apresenta algumas estratégias para eliminar, da saída do sensor Hall, a influência do campo gerado pelo atuador eletromagnético. Os métodos são testados através de experimentos de levitação em mancal magnético e a eficácia dos mesmos comprovada.

The Escola Politécnica of the University of São Paulo (EPUSP, Brazil) and the Institute Dante Pazzanese of Cardiology (IDPC, Brazil) are jointly developing a Ventricular Assist Device (VAD) based on a mixed flow pump with magnetic bearings. The VAD rotor has a conical shape with spiral impellers that impels and pressurizes the blood. The magnetic bearing eliminates mechanical contact between the pump rotor and the VAD body, minimizing hemolysis and improving the lifetime of the VAD. The magnetic bearing studied is the hybrid type that combines permanent magnets with electromagnets to execute active control in the axial direction of the rotor. In the original configuration, the bearing uses inductive sensor to detect the axial position of the rotor. The sensor readings are sent to a PID type…

Advisors/Committee Members: Horikawa, Oswaldo.

Subjects/Keywords: Hall sensor; Magnetic bearing; Mancal magnético; Medidas de posição; Position measurement; Sensor Hall

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Antunes, P. I. T. d. C. (2012). Medição de posição de rotor em mancal magnético através de sensor Hall. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3152/tde-10062013-152331/ ;

Chicago Manual of Style (16^th Edition):

Antunes, Pedro Ivo Teixeira de Carvalho. “Medição de posição de rotor em mancal magnético através de sensor Hall.” 2012. Masters Thesis, University of São Paulo. Accessed March 08, 2021. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-10062013-152331/ ;.

MLA Handbook (7^th Edition):

Antunes, Pedro Ivo Teixeira de Carvalho. “Medição de posição de rotor em mancal magnético através de sensor Hall.” 2012. Web. 08 Mar 2021.

Vancouver:

Antunes PITdC. Medição de posição de rotor em mancal magnético através de sensor Hall. [Internet] [Masters thesis]. University of São Paulo; 2012. [cited 2021 Mar 08]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3152/tde-10062013-152331/ ;.

Council of Science Editors:

Antunes PITdC. Medição de posição de rotor em mancal magnético através de sensor Hall. [Masters Thesis]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/3/3152/tde-10062013-152331/ ;

Texas A&M University

14. Saeed, Ahmed. Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly.

Degree: PhD, Mechanical Engineering, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11035

► In this study, a novel concept for a downhole flywheel energy storage module to be embedded in a bottom-hole-assembly (BHA) is presented and modeled, as… (more)

▼ In this study, a novel concept for a downhole flywheel energy storage module to be embedded in a bottom-hole-assembly (BHA) is presented and modeled, as an alternative power source to existing lithium-ion battery packs currently deployed in measurement-while-drilling (MWD) or logging-while-drilling (LWD) operations. Lithium-ion batteries disadvantages include deteriorated performance in high temperature, limited lifetime that necessitates frequent replacement which elevates operational costs, and environmental disposal. Extreme and harsh downhole conditions necessitate that the flywheel module withstands temperatures and pressures exceeding 300 ?F and 20 kpsi, respectively, as well as violent vibrations encountered during drilling. Moreover, the flywheel module should adhere to the geometric constraints of the wellbore and its corresponding BHA. Hence, a flywheel sizing procedure was developed that takes into consideration the required energy to be stored, the surrounding environmental conditions, and the geometric constraints. A five-axis magnetic levitation control system was implemented and tuned to maintain continuous suspension of the flywheel under the harsh lateral, axial and torsional drilling vibrations of the BHA. Thus, an integrated finite element model was developed that included the rotordynamic behavior of the flywheel and the BHA, the component dynamics of the magnetic levitation control system, and the cutting dynamics of the drillbit for both PDC and tricone types. The model also included a newly developed coupling between lateral, axial and torsional vibrations. It was demonstrated through simulations conducted by numerical integration that the flywheel maintains levitation due to all different types of external vibration as well as its own lateral vibration due to mass unbalance. Moreover, a passive proof-mass-damper (PPMD) was developed that suppresses axial bit-bounce vibrations as well as torsional vibrations, and was extended to also mitigate lateral vibrations. Optimized values of the mass, stiffness and damping values of the PPMD were obtained by the hybrid analytical-numerical Chebyshev spectral method that was superior in computational efficiency to iterative numerical integration. This also enabled the fine-plotting of an operating stability chart indicating stability regions where bit-bounce and stick-slip are avoided. The proof-mass-damping concept was extended to the flywheel to be an active proof-mass-damper (APMD) where simulations indicated functionality for a light-weight BHA. Advisors/Committee Members: Palazzolo, Alan B. (advisor), Ahmed, Shehab (advisor), Kim, Won-jong (committee member), McAdams, Daniel (committee member).

Subjects/Keywords: Downhole Flywheel; Bottom-Hole-Assembly (BHA); Drillstring Vibrations; Drillbit Cutting Dynamics; Active Magnetic Bearing (AMB)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Saeed, A. (2012). Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11035

Chicago Manual of Style (16^th Edition):

Saeed, Ahmed. “Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11035.

MLA Handbook (7^th Edition):

Saeed, Ahmed. “Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly.” 2012. Web. 08 Mar 2021.

Vancouver:

Saeed A. Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11035.

Council of Science Editors:

Saeed A. Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11035

Texas A&M University

15. Wiesenborn, Robert Kyle. Circular sensor array and nonlinear analysis of homopolar magnetic bearings.

Degree: MS, Mechanical Engineering, 2007, Texas A&M University

URL: http://hdl.handle.net/1969.1/4783

► Magnetic bearings use variable attractive forces generated by electromagnetic control coils to support rotating shafts with low friction and no material wear while providing variable… (more)

▼ Magnetic bearings use variable attractive forces generated by electromagnetic control coils to support rotating shafts with low friction and no material wear while providing variable stiffness and damping. Rotor deflections are stabilized by position feedback control along two axes using non-contacting displacement sensors. These sensor signals contain sensor runout error which can be represented by a Fourier series composed of harmonics of the spin frequency. While many methods have been proposed to compensate for these runout harmonics, most are computationally intensive and can destabilize the feedback loop. One attractive alternative is to increase the number of displacement sensors and map individual probe voltages to the two independent control signals. This approach is implemented using a circular sensor array and single weighting gain matrix in the present work. Analysis and simulations show that this method eliminates runout harmonics from 2 to n-2 when all sensors in an ideal n-sensor array are operational. Sensor failures result in reduced synchronous amplitude and increased harmonic amplitudes after failure. These amplitudes are predicted using derived expressions and synchronous measurement error can be corrected using an adjustment factor for single failures. A prototype 8-sensor array shows substantial runout reduction and bandwidth and sensitivity comparable to commercial systems. Nonlinear behavior in homopolar magnetic bearings is caused primarily by the quadratic relationship between coil currents and magnetic support forces. Governing equations for a permanent magnet biased homopolar magnetic bearing are derived using magnetic circuit equations and linearized using voltage and position stiffness terms. Nonlinear hardening and softening spring behavior is achieved by varying proportional control gain and frequency response is determined for one case using numerical integration and a shooting algorithm. Maximum amplitudes and phase reversal for this nonlinear system occur at lower frequencies than the linearized system. Rotor oscillations exhibit amplitude jumps by cyclic fold bifurcations, creating a region of hysteresis where multiple stable equilibrium states exist. One of these equilibrium states contains subharmonic frequency components resulting in quasiperiodic rotor motion. This nonlinear analysis shows how nonlinear rotor oscillations can be avoided for a wide range of operation by careful selection of design parameters and operating conditions. Advisors/Committee Members: Palazzolo, Alan B. (advisor), Strganac, Thomas W. (committee member), Vance, John M. (committee member).

Subjects/Keywords: sensor; array; nonlinear; homopolar; magnetic; bearing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wiesenborn, R. K. (2007). Circular sensor array and nonlinear analysis of homopolar magnetic bearings. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/4783

Chicago Manual of Style (16^th Edition):

Wiesenborn, Robert Kyle. “Circular sensor array and nonlinear analysis of homopolar magnetic bearings.” 2007. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/4783.

MLA Handbook (7^th Edition):

Wiesenborn, Robert Kyle. “Circular sensor array and nonlinear analysis of homopolar magnetic bearings.” 2007. Web. 08 Mar 2021.

Vancouver:

Wiesenborn RK. Circular sensor array and nonlinear analysis of homopolar magnetic bearings. [Internet] [Masters thesis]. Texas A&M University; 2007. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/4783.

Council of Science Editors:

Wiesenborn RK. Circular sensor array and nonlinear analysis of homopolar magnetic bearings. [Masters Thesis]. Texas A&M University; 2007. Available from: http://hdl.handle.net/1969.1/4783

16. Lundh, Joachim. Model Predictive Control for Active Magnetic Bearings.

Degree: The Institute of Technology, 2012, Linköping UniversityLinköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81325

►

This thesis discuss the possibility to position control a rotor levitated with active magnetic bearings. The controller type considered is model predictive control which… (more)

Subjects/Keywords: active magnetic bearing (AMB); model predictive control (MPC); quadratic programing (QP); real time; parameter scheduling

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APA (6^th Edition):

Lundh, J. (2012). Model Predictive Control for Active Magnetic Bearings. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81325

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lundh, Joachim. “Model Predictive Control for Active Magnetic Bearings.” 2012. Thesis, Linköping UniversityLinköping University. Accessed March 08, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81325.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lundh, Joachim. “Model Predictive Control for Active Magnetic Bearings.” 2012. Web. 08 Mar 2021.

Vancouver:

Lundh J. Model Predictive Control for Active Magnetic Bearings. [Internet] [Thesis]. Linköping UniversityLinköping University; 2012. [cited 2021 Mar 08]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81325.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lundh J. Model Predictive Control for Active Magnetic Bearings. [Thesis]. Linköping UniversityLinköping University; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81325

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

17. Kolařík, František. Řídicí systém aktivního magnetického ložiska: Control system of active magnetic bearing.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/7706

► Thesis deals with active magnetic bearing (AMB) levitation control design. Its prototype was done in FSI collaboration with FEKT VUT Brno. The research is focused… (more)

Subjects/Keywords: Aktivní magnetické ložisko; AML; NI LabVIEW; řízení; Active magnetic bearing; AMB; NI LabVIEW; control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kolařík, F. (2018). Řídicí systém aktivního magnetického ložiska: Control system of active magnetic bearing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/7706

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kolařík, František. “Řídicí systém aktivního magnetického ložiska: Control system of active magnetic bearing.” 2018. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/7706.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kolařík, František. “Řídicí systém aktivního magnetického ložiska: Control system of active magnetic bearing.” 2018. Web. 08 Mar 2021.

Vancouver:

Kolařík F. Řídicí systém aktivního magnetického ložiska: Control system of active magnetic bearing. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/7706.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kolařík F. Řídicí systém aktivního magnetického ložiska: Control system of active magnetic bearing. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/7706

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

18. Desireddy, Vijesh R. Test-Theory Correlation Study for an Ultra High Temperature Thrust Magnetic Bearing.

Degree: MS, Mechanical Engineering, 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-232

► Magnetic bearings have been researched by the National Aeronautics and Space Administration (NASA) for a very long time to be used in wide applications. This… (more)

Subjects/Keywords: high temperature; thrust magnetic bearing

…5 THEORY OF MAGNETIC BEARING TECHNOLOGY ................................ 6 2.1 2.2 2.3… …6 Operation of Active Magnetic Bearing… …6 Characteristics of Magnetic Bearing… …14 3.1 3.2 3.3 3.4 Parts of the Magnetic Bearing… …31 Magnetic Bearing Assembly Explanation ........................................... 39…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Desireddy, V. R. (2010). Test-Theory Correlation Study for an Ultra High Temperature Thrust Magnetic Bearing. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-232

Chicago Manual of Style (16^th Edition):

Desireddy, Vijesh R. “Test-Theory Correlation Study for an Ultra High Temperature Thrust Magnetic Bearing.” 2010. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-232.

MLA Handbook (7^th Edition):

Desireddy, Vijesh R. “Test-Theory Correlation Study for an Ultra High Temperature Thrust Magnetic Bearing.” 2010. Web. 08 Mar 2021.

Vancouver:

Desireddy VR. Test-Theory Correlation Study for an Ultra High Temperature Thrust Magnetic Bearing. [Internet] [Masters thesis]. Texas A&M University; 2010. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-232.

Council of Science Editors:

Desireddy VR. Test-Theory Correlation Study for an Ultra High Temperature Thrust Magnetic Bearing. [Masters Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-232

Brno University of Technology

19. Polášek, Lukáš. Speciální typy ložisek a jejich aplikace: Special bearing types and its application.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/14205

► The goal of this bachelor’s thesis is to provide a search analysis of special bearing types. This work is focused especially to magnetic and air… (more)

Subjects/Keywords: speciální typy ložisek; magnetické ložiska; magnetická levitace; vzduchová ložiska; special types of bearing; magnetic bearings; magnetic levitation; air bearings

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APA (6^th Edition):

Polášek, L. (2019). Speciální typy ložisek a jejich aplikace: Special bearing types and its application. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/14205

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Polášek, Lukáš. “Speciální typy ložisek a jejich aplikace: Special bearing types and its application.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/14205.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Polášek, Lukáš. “Speciální typy ložisek a jejich aplikace: Special bearing types and its application.” 2019. Web. 08 Mar 2021.

Vancouver:

Polášek L. Speciální typy ložisek a jejich aplikace: Special bearing types and its application. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/14205.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Polášek L. Speciální typy ložisek a jejich aplikace: Special bearing types and its application. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/14205

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

20. Dostál, Patrik. Pasivní axiální magnetické ložisko: Passive axial magnetic bearing.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/176736

► The goal of the bachelor thesis is to measure the characteristics of a passive magnetic bearing. The practical part of the thesis consists of two… (more)

Subjects/Keywords: Pasivní magnetické ložisko; magnetismus; metoda konečných prvků; magnetická levitace; Passive magnetic bearing; magnetism; finite element method; magnetic levitation

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APA (6^th Edition):

Dostál, P. (2019). Pasivní axiální magnetické ložisko: Passive axial magnetic bearing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/176736

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dostál, Patrik. “Pasivní axiální magnetické ložisko: Passive axial magnetic bearing.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/176736.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dostál, Patrik. “Pasivní axiální magnetické ložisko: Passive axial magnetic bearing.” 2019. Web. 08 Mar 2021.

Vancouver:

Dostál P. Pasivní axiální magnetické ložisko: Passive axial magnetic bearing. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/176736.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dostál P. Pasivní axiální magnetické ložisko: Passive axial magnetic bearing. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/176736

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

21. Molenaar, A. A novel Planar Magnetic Bearing and Motor Configuration applied in a Positioning Stage.

Degree: 2000, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88

► This thesis presents the design and implementation of a fully contactless high precision magnetically suspended position stage with large planar stroke. This stage is the… (more)

▼ This thesis presents the design and implementation of a fully contactless high precision magnetically suspended position stage with large planar stroke. This stage is the first which is suitable for practical application in vacuum. The underlying electromechanical working principles, modelling and analysis, the mechanical and electrical design, real-time control, and the experimental results of a test set-up are presented. The possibility to combine magnetic suspension and propulsion in a single actuator was proven experimentally by a PhD investigation performed by Frank Auer in the years 19901995 at the Laboratory for Micro Engineering at Delft University of Technology. Prototypes showed low cross-coupling of suspension and propulsion, and sensor-limited accuracy. In 1995, this research started as a follow-up, with the goal: improvement of the practical applicability of linear Active Magnetic Bearings (ambs) in the field of Precision Engineering. Therefore, an investigation into the state-of-the-art in ambs was performed, which revealed that, due to the high development costs, ambs can be applied best for either high end applications (e.g. linear motion stages with high precision and throughput) or for high volume consumer products (e.g. bearings for hard disk drives). These applications then profit of the general advantages of ambs, like contactless operation (no wear, no maintenance, possibly application in vacuum, absence of stick-slip), and adjustable bearing characteristics (servo position, variable stiffness and damping, active vibration isolation). Disadvantages that may limit the applicability are the limited dynamic stiffness and bearing force, with its accompanying break-through risk, and the heat development by the coils. While rotational amb actuators are mature, and have become commercially available for several years, major development effort is focused on advanced control, reliability, modularity, and cost reduction there. In contrast, linear amb actuators are still evolving. Compared to their rotational counterparts, linear systems offer only one additional degree-of-freedom, but this leads to much more freedom of the electromechanical actuator design. Since no specific application was predefined for this research, a market investigation was performed. The results were combined into the definition of a target application. When the requirements for such an application were compared to the performance delivered by the stage that was developed by Auer, it turned out that the range of the planar stroke, the positioning accuracy, the propulsion force, and the acceleration all needed to be improved, before practical application could be considered. Moreover, for application in vacuum, the development of heat should be minimized, and the power dissipation on the suspended object needs to be negligible. This can only be accomplished by a thorough re-design or a completely new principle. Based on an investigation of the principles of electromechanics, and the status and applications of electromechanical… Advisors/Committee Members: Van Beek, H.F..

Subjects/Keywords: active magnetic bearing; magnetic suspension; linear motor; permanent magnet

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APA (6^th Edition):

Molenaar, A. (2000). A novel Planar Magnetic Bearing and Motor Configuration applied in a Positioning Stage. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88

Chicago Manual of Style (16^th Edition):

Molenaar, A. “A novel Planar Magnetic Bearing and Motor Configuration applied in a Positioning Stage.” 2000. Doctoral Dissertation, Delft University of Technology. Accessed March 08, 2021. http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88.

MLA Handbook (7^th Edition):

Molenaar, A. “A novel Planar Magnetic Bearing and Motor Configuration applied in a Positioning Stage.” 2000. Web. 08 Mar 2021.

Vancouver:

Molenaar A. A novel Planar Magnetic Bearing and Motor Configuration applied in a Positioning Stage. [Internet] [Doctoral dissertation]. Delft University of Technology; 2000. [cited 2021 Mar 08]. Available from: http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88.

Council of Science Editors:

Molenaar A. A novel Planar Magnetic Bearing and Motor Configuration applied in a Positioning Stage. [Doctoral Dissertation]. Delft University of Technology; 2000. Available from: http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; urn:NBN:nl:ui:24-uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88 ; http://resolver.tudelft.nl/uuid:d26cbedc-ab32-4107-89a7-ed62648b3d88

Cleveland State University

22. LI, YUNLU. Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System.

Degree: MSin Mechanical Engineering, Fenn College of Engineering, 2011, Cleveland State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=csu1303841533

► Different types of bearings have different dynamic characteristics. By using one type of bearing at one end of a rotor and another type of bearing… (more)

Subjects/Keywords: Engineering; Mechanical Engineering; rotordynamic; active magnetic bearing; modeling; dissimilar bearing support

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APA (6^th Edition):

LI, Y. (2011). Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System. (Masters Thesis). Cleveland State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=csu1303841533

Chicago Manual of Style (16^th Edition):

LI, YUNLU. “Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System.” 2011. Masters Thesis, Cleveland State University. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=csu1303841533.

MLA Handbook (7^th Edition):

LI, YUNLU. “Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System.” 2011. Web. 08 Mar 2021.

Vancouver:

LI Y. Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System. [Internet] [Masters thesis]. Cleveland State University; 2011. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1303841533.

Council of Science Editors:

LI Y. Modeling and Performance Investigation of a Rotor with Dissimilar Bearing Support System. [Masters Thesis]. Cleveland State University; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1303841533

23. Van Rensburg, Jan Jacobus Janse. Delevitation modelling of an active magnetic bearing supported rotor / Jan Jacobus Janse van Rensburg .

Degree: 2014, North-West University

URL: http://hdl.handle.net/10394/10662

► The problem addressed in this thesis is the delevitation modelling of an active magnetic bearing (AMB) supported rotor. A system model needs to be developed… (more)

▼ The problem addressed in this thesis is the delevitation modelling of an active magnetic bearing (AMB) supported rotor. A system model needs to be developed that models the highly non-linear interaction of the rotor with the backup bearings (BBs) during a delevitation event. The model should accurately predict forward and backward whirl as well as the system forces experienced. To this end, the severity of rotor delevitation events should be characterised. The contributions of the research include a more comprehensive model of a cross-coupled flexible rotor-AMB-BB system, a method to obtain repeatable experimental results, two methods for quantifying the severity of a rotor-drop (RDQ and Vval) and the simulation of forward whirl. A simulation model (BBSim) was developed to predict the behaviour of a rotor in rolling element BBs in an AMB system during a rotor delevitation event. The model was validated using a novel rotor delevitation severity quantification method (Vval) to compare experimental and simulated results. In this study the force impulse values as the rotor impacts the BBs are seen as critical to monitor, as an indication of rotor drop severity. The novel quantification method was verified by comparing the impulse values of delevitation events to the values obtained for the same delevitation events using the novel quantification method. The simulation model (BBSim) was developed by integrating and cross coupling various simpler models to obtain a model that could accurately predict the behaviour of a rotor during a delevitation event. A plethora of simulation results were generated for various initial conditions. The simulation results were used to perform a parametric study, from which the effects that certain design parameters have on the severity of rotor delevitation events are determined. The novel quantification method results presented in this research compared well to the impulse values. Since most AMB systems that have BBs do not have force measurement capabilities, the development of the novel quantification method enables the quantification of rotor drop severity solely based on position data. The simulation model BBSim was found to accurately predict the behaviour of a rotor during a delevitation event. The parametric study completed using BBSim revealed that the severity of rotor delevitation events is less sensitive to the bearing stiffness than the bearing damping. The parametric study also found that the severity of a delevitation event is slightly sensitive to the angle of delevitation. The friction factor between the rotor and the inner-race of the rolling element bearings moderately influences the severity of the rotor delevitation event. The inertia of the rolling element bearing’s inner-race and balls influences the behaviour in a complex manner, where the inertia should be kept as low as possible for actively braked rotors, and should be higher for free running rotors. The unbalance of the rotor plays a major role in the severity of rotor delevitation events. A rotor with a…

Subjects/Keywords: Backup bearing; Auxiliary bearing; Catcher bearing; Retainer bearing; Modelling; Quantification; Physical system modelling; Rotor drop; Rotor delevitation; Active magnetic bearing

…PMB Rotor/BB TMM ZCAB Active magnetic bearing Analysis of non-linear AMB systems Backup… …magnetic bearing Rotor and backup bearing Transfer matrix method Zero clearance auxiliary bearing… …active magnetic bearing supported rotor. A system model needs to be developed that models the… …AMB failure [69] Forces before AMB failure Magnetic bearing force FAMB  K AMB… …7 Figure 3: Effect of bearing support stiffness K on lateral vibration modes of a uniform…

10 more images…

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APA (6^th Edition):

Van Rensburg, J. J. J. (2014). Delevitation modelling of an active magnetic bearing supported rotor / Jan Jacobus Janse van Rensburg . (Thesis). North-West University. Retrieved from http://hdl.handle.net/10394/10662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Van Rensburg, Jan Jacobus Janse. “Delevitation modelling of an active magnetic bearing supported rotor / Jan Jacobus Janse van Rensburg .” 2014. Thesis, North-West University. Accessed March 08, 2021. http://hdl.handle.net/10394/10662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Van Rensburg, Jan Jacobus Janse. “Delevitation modelling of an active magnetic bearing supported rotor / Jan Jacobus Janse van Rensburg .” 2014. Web. 08 Mar 2021.

Vancouver:

Van Rensburg JJJ. Delevitation modelling of an active magnetic bearing supported rotor / Jan Jacobus Janse van Rensburg . [Internet] [Thesis]. North-West University; 2014. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10394/10662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Van Rensburg JJJ. Delevitation modelling of an active magnetic bearing supported rotor / Jan Jacobus Janse van Rensburg . [Thesis]. North-West University; 2014. Available from: http://hdl.handle.net/10394/10662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

24. Costa, Eduardo Alves da. Mancal magnético ativo aplicado a um motor de indução linear tubular.

Degree: PhD, Engenharia de Sistemas, 2009, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3139/tde-21122009-131641/ ;

►

O Motor Assíncrono Tubular para Aplicação na Extração de Óleo do Subsolo MATÆOS foi desenvolvido na Escola Politécnica da Universidade de São Paulo (EPUSP) com… (more)

▼

O Motor Assíncrono Tubular para Aplicação na Extração de Óleo do Subsolo MATÆOS foi desenvolvido na Escola Politécnica da Universidade de São Paulo (EPUSP) com a função de acionar diretamente uma bomba de sucção, instalada no fundo de um poço de petróleo em terra. Dando continuidade aos trabalhos realizados na EPUSP envolvendo sistemas de levitação magnética, foi desenvolvido um mancal magnético ativo (AMB - Active Magnetic Bearing), aplicado ao protótipo do motor em substituição ao mancal mecânico tradicional existente. O projeto abrange a construção de um protótipo de mancal magnético composto das partes mecânicas, elétricas e de software necessárias ao funcionamento do sistema. O projeto do eletroímã foi realizado por meio do método dos elementos finitos (MEF), para análise da densidade de fluxo e da relação entre a força radial e a corrente elétrica nas bobinas. O controle da levitação do mancal é realizado por meio de controlador digital com placas conversoras AD/DA e algoritmo de controle implementado em hardware FPGA. Utilizando o modelo do sistema, os controladores são sintonizados para atender aos requisitos de estabilidade e rejeição de perturbações, que desviem o entreferro do seu valor nominal. Na configuração do AMB, ao invés do sistema tradicional com oito pólos, um conceito diferente é adotado. Neste, uma máquina primitiva bearingless é excitada com corrente contínua e usada como mancal magnético. Os resultados experimentais obtidos com o protótipo em funcionamento mostram que o sistema em malha fechada é estável e apresenta uma resposta transitória satisfatória.

A tubular linear induction motor applied to onshore oil exploitation, named MATÆOS (which is in the Portuguese acronym for Tubular Asynchronous Motor for Onshore Oil Exploitation) was built at Escola Politécnica da Universidade de São Paulo (EPUSP). Its purpose is to directly drive the sucker-rod pump installed in the down hole of the oil well. In continuing the research accomplished at EPUSP concerning magnetic levitation systems, an Active Magnetic Bearing (AMB) was developed and applied to the prototype of the motor in substitution to the existing traditional bearing. The design includes the construction of the magnetic bearing prototype composed of mechanical, electric and software components required to the operation of the system. The electromagnet design was accomplished using the Finite Element Method (FEM) in the analysis of both the flux density and the relationship between the radial force and the suspension winding current. The magnetic bearing levitation control is executed by a digital controller using an AD/DA converter and a control algorithm implemented in FPGA hardware. Using the system model, the controllers are tuned to provide both stability and rejection of disturbances that tend to move the air gap from its nominal value. Instead of the usual eight-pole AMB, a different concept is adopted where a DC-excited primitive bearingless machine is used as a magnetic bearing. The experimental results obtained with the…

Advisors/Committee Members: Cruz, José Jaime da.

Subjects/Keywords: Active magnetic bearing; Bearingless motor; Controle (teoria de sistemas e controle); Feedback control system; Motores elétricos; Tubular linear induction motor

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Costa, E. A. d. (2009). Mancal magnético ativo aplicado a um motor de indução linear tubular. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3139/tde-21122009-131641/ ;

Chicago Manual of Style (16^th Edition):

Costa, Eduardo Alves da. “Mancal magnético ativo aplicado a um motor de indução linear tubular.” 2009. Doctoral Dissertation, University of São Paulo. Accessed March 08, 2021. http://www.teses.usp.br/teses/disponiveis/3/3139/tde-21122009-131641/ ;.

MLA Handbook (7^th Edition):

Costa, Eduardo Alves da. “Mancal magnético ativo aplicado a um motor de indução linear tubular.” 2009. Web. 08 Mar 2021.

Vancouver:

Costa EAd. Mancal magnético ativo aplicado a um motor de indução linear tubular. [Internet] [Doctoral dissertation]. University of São Paulo; 2009. [cited 2021 Mar 08]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3139/tde-21122009-131641/ ;.

Council of Science Editors:

Costa EAd. Mancal magnético ativo aplicado a um motor de indução linear tubular. [Doctoral Dissertation]. University of São Paulo; 2009. Available from: http://www.teses.usp.br/teses/disponiveis/3/3139/tde-21122009-131641/ ;

Texas A&M University

25. Zutavern, Zachary Scott. Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings.

Degree: MS, Mechanical Engineering, 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/152

► Historical attempts to measure forces in magnetic bearings have been unsuccessful as a result of relatively high uncertainties. Recent advances in the strain-gauge technology have… (more)

Subjects/Keywords: rotordynamic; magnetic bearing; force measurement; calibrated exciter

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zutavern, Z. S. (2004). Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152

Chicago Manual of Style (16^th Edition):

Zutavern, Zachary Scott. “Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings.” 2004. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/152.

MLA Handbook (7^th Edition):

Zutavern, Zachary Scott. “Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings.” 2004. Web. 08 Mar 2021.

Vancouver:

Zutavern ZS. Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings. [Internet] [Masters thesis]. Texas A&M University; 2004. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/152.

Council of Science Editors:

Zutavern ZS. Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings. [Masters Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/152

North-West University

26. Hudson, Robert Dearn. Development of an integrated co-processor based power electronic drive / by Robert D. Hudson .

Degree: 2008, North-West University

URL: http://hdl.handle.net/10394/3723

► The McTronX research group at the North-West University is currently researching self-sensing techniques for Active Magnetic Bearings (AMB). The research is part of an ongoing… (more)

▼ The McTronX research group at the North-West University is currently researching self-sensing techniques for Active Magnetic Bearings (AMB). The research is part of an ongoing effort to expand the knowledge base on AMBs in the School of Electrical, Electronic and Computer Engineering to support industries that make use of the technology. The aim of this project is to develop an integrated co-processor based power electronic drive with the emphasis placed on the ability of the co-processor to execute AMB self-sensing algorithms. The two primary techniques for implementing self-sensing in AMBs are state estimation and modulation. This research focuses on hardware development to facilitate the implementation of the modulation method. Self-sensing algorithms require concurrent processing power and speed that are well suited to an architecture that combines a digital signal processor (DSP) and a field programmable gate array (FPGA). A comprehensive review of various power amplifier topologies shows that the pulse width modulation (PWM) switching amplifier is best suited for controlling the voltage and current required to drive the AMB coils. Combining DSPs and power electronics to form an integrated co-processor based power electronic drive requires detail attention to aspects of PCB design, including signal integrity and grounding. A conceptual design is conducted and forms part of the process of compiling a subsystem development specification for the integrated drive, in conjunction with the McTronX Research Group. Component selection criteria, trade-off studies and various circuit simulations serve as the basis for this essential phase of the project. The conceptual design and development specification determines the architecture, functionality and interfaces of the integrated drive. Conceptual designs for the power amplifier, digital controller, electronic supply and mechanical layout of the integrated drive is provided. A detail design is performed for the power amplifier, digital controller and electronic supply. Issues such as component selection, power supply requirements, thermal design, interfacing of the various circuit elements and PCB design are covered in detail. The output of the detail design is a complete set of circuit diagrams for the integrated controller. The integrated drive is interfaced with existing AMB hardware and facilitates the successful implementation of two self-sensing techniques. The hardware performance of the integrated coprocessor based power electronic drive is evaluated by means of measurements taken from this experimental self-sensing setup. The co-processor performance is evaluated in terms of resource usage and execution time and performs satisfactorily in this regard. The integrated co-processor based power electronic drive provided sufficient resources, processing speed and flexibility to accommodate a variety of self-sensing algorithms thus contributing to the research currently underway in the field of AMBs by the McTronX research group at the North-West University.

Subjects/Keywords: Active magnetic bearing; Co-processor; Digital signal processor; Field programmable gate array; Power amplifie; Pulse width modulation; Self-sensing; Signal integrity

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hudson, R. D. (2008). Development of an integrated co-processor based power electronic drive / by Robert D. Hudson . (Thesis). North-West University. Retrieved from http://hdl.handle.net/10394/3723

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hudson, Robert Dearn. “Development of an integrated co-processor based power electronic drive / by Robert D. Hudson .” 2008. Thesis, North-West University. Accessed March 08, 2021. http://hdl.handle.net/10394/3723.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hudson, Robert Dearn. “Development of an integrated co-processor based power electronic drive / by Robert D. Hudson .” 2008. Web. 08 Mar 2021.

Vancouver:

Hudson RD. Development of an integrated co-processor based power electronic drive / by Robert D. Hudson . [Internet] [Thesis]. North-West University; 2008. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10394/3723.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hudson RD. Development of an integrated co-processor based power electronic drive / by Robert D. Hudson . [Thesis]. North-West University; 2008. Available from: http://hdl.handle.net/10394/3723

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Colorado

27. Chabot, Joshua A. A Spherical Magnetic Dipole Actuator for Spacecraft Attitude Control.

Degree: MS, Aerospace Engineering Sciences, 2015, University of Colorado

URL: https://scholar.colorado.edu/asen_gradetds/100

► Spacecraft generally require multiple attitude control devices to achieve full attitude actuation because of the limited control authority a single, traditional device can provide.… (more)

Subjects/Keywords: attitude control; magetic dipole; magnetic bearing; reaction sphere; spherical actuator; Navigation, Guidance, Control and Dynamics; Space Vehicles

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chabot, J. A. (2015). A Spherical Magnetic Dipole Actuator for Spacecraft Attitude Control. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/asen_gradetds/100

Chicago Manual of Style (16^th Edition):

Chabot, Joshua A. “A Spherical Magnetic Dipole Actuator for Spacecraft Attitude Control.” 2015. Masters Thesis, University of Colorado. Accessed March 08, 2021. https://scholar.colorado.edu/asen_gradetds/100.

MLA Handbook (7^th Edition):

Chabot, Joshua A. “A Spherical Magnetic Dipole Actuator for Spacecraft Attitude Control.” 2015. Web. 08 Mar 2021.

Vancouver:

Chabot JA. A Spherical Magnetic Dipole Actuator for Spacecraft Attitude Control. [Internet] [Masters thesis]. University of Colorado; 2015. [cited 2021 Mar 08]. Available from: https://scholar.colorado.edu/asen_gradetds/100.

Council of Science Editors:

Chabot JA. A Spherical Magnetic Dipole Actuator for Spacecraft Attitude Control. [Masters Thesis]. University of Colorado; 2015. Available from: https://scholar.colorado.edu/asen_gradetds/100

Delft University of Technology

28. Auer, F. Combined electromagnetic suspension and propulsion for positioning with sub-micrometer accuracy.

Degree: 1995, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e

Subjects/Keywords: Active Magnetic Bearing (AMB); Linear Motor; sub-Micrometer Accuracy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Auer, F. (1995). Combined electromagnetic suspension and propulsion for positioning with sub-micrometer accuracy. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e

Chicago Manual of Style (16^th Edition):

Auer, F. “Combined electromagnetic suspension and propulsion for positioning with sub-micrometer accuracy.” 1995. Doctoral Dissertation, Delft University of Technology. Accessed March 08, 2021. http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e.

MLA Handbook (7^th Edition):

Auer, F. “Combined electromagnetic suspension and propulsion for positioning with sub-micrometer accuracy.” 1995. Web. 08 Mar 2021.

Vancouver:

Auer F. Combined electromagnetic suspension and propulsion for positioning with sub-micrometer accuracy. [Internet] [Doctoral dissertation]. Delft University of Technology; 1995. [cited 2021 Mar 08]. Available from: http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e.

Council of Science Editors:

Auer F. Combined electromagnetic suspension and propulsion for positioning with sub-micrometer accuracy. [Doctoral Dissertation]. Delft University of Technology; 1995. Available from: http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; urn:NBN:nl:ui:24-uuid:8531fcf4-58f4-4347-ad5f-766769651f6e ; http://resolver.tudelft.nl/uuid:8531fcf4-58f4-4347-ad5f-766769651f6e

University of Edinburgh

29. Chuan, Haw Wooi. Reducing unbalanced magnetic pull in induction machines.

Degree: PhD, 2018, University of Edinburgh

URL: http://hdl.handle.net/1842/31435

► Induction machines are the most widely used type of electrical machines because of their robustness, simplicity, and relatively low cost. However, the small airgap in… (more)

▼ Induction machines are the most widely used type of electrical machines because of their robustness, simplicity, and relatively low cost. However, the small airgap in the induction machine makes them more susceptible to Unbalanced Magnetic Pull (UMP). This is because the magnitude of the UMP is a function of the degree of eccentricity, which is the ratio between the length of misalignment and the mean airgap length. The bearing-related failure accounts for approximately 41% of the total failures of induction machines; the percentages of bearing-related failure would be higher for applications in a harsher environment. In this thesis, the UMP caused by rotor eccentricity is investigated, because a small degree of rotor eccentricity is unavoidable due to the manufacturing tolerance and 80% of the mechanical faults could cause rotor eccentricity in electrical machines. When the rotor is not at the centre of the stator, the eccentric rotor causes an uneven airgap around the rotor, in which the magnetic permeance with the higher harmonics content will be created. The magnetomotive force (MMF) produces additional pole-pair ±1 magnetic flux around the airgap. The interaction between each magnetic flux with its pole pair ±1 magnetic flux produces UMP. As only the magnetic flux that crosses the airgap causes UMP, the magnetic flux is categorised into magnetising flux and airgap leakage flux, because both types of flux possess different characteristics at a different rotor slip. As the airgap leakage flux is difficult to calculate analytically, an empirical method is proposed to estimate the UMP caused by the airgap leakage flux. Then, the UMP caused by the magnetising flux can also be estimated by using the empirical method. The parameters for the empirical method can be found by using either the FEA or the experimental results. The damping effect of the magnetising flux in a parallel connected rotor bar is discussed and a damping coefficient is introduced to explain this scenario. The damping coefficient can also be used to calculate the UMP in a steady state analysis. UMP comparisons between the cage rotor and wound rotor induction machines are made. The wound rotor has a much higher UMP because the pole-specific wound rotor could not damp the additional pole pair ±1 magnetic flux. Therefore, a damper winding at the stator slot is also proposed in order to damp the UMP by producing a counteracting flux. In addition, analytical equations have also been derived for different scenarios, such as static eccentricity, dynamic eccentricity, axial-varying eccentricity, and skew rotor bars. Finite Element Analysis (FEA) and experimental work are used to demonstrate the derived analytical equation. Furthermore, the power losses caused by the rotor eccentricity are investigated. Iron losses, copper losses, and frictional loss are discussed and compared with both the analytical equation and the FEA results. In order to reduce the UMP in the induction machines, the two proposed methods are the slip control method and damper windings…

Subjects/Keywords: 621.34; airgap; Unbalanced Magnetic Pull; UMP; bearing-related failure; rotor eccentricity; magnetomotive force; finite element analysis; FEA; UMP/Torque ratio

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chuan, H. W. (2018). Reducing unbalanced magnetic pull in induction machines. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/31435

Chicago Manual of Style (16^th Edition):

Chuan, Haw Wooi. “Reducing unbalanced magnetic pull in induction machines.” 2018. Doctoral Dissertation, University of Edinburgh. Accessed March 08, 2021. http://hdl.handle.net/1842/31435.

MLA Handbook (7^th Edition):

Chuan, Haw Wooi. “Reducing unbalanced magnetic pull in induction machines.” 2018. Web. 08 Mar 2021.

Vancouver:

Chuan HW. Reducing unbalanced magnetic pull in induction machines. [Internet] [Doctoral dissertation]. University of Edinburgh; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1842/31435.

Council of Science Editors:

Chuan HW. Reducing unbalanced magnetic pull in induction machines. [Doctoral Dissertation]. University of Edinburgh; 2018. Available from: http://hdl.handle.net/1842/31435

Brno University of Technology

30. Turek, Milan. Inteligentní řídící člen aktivního magnetického ložiska: Inteligent Controller of Active Magnetic Bearing.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/7694

► The PhD thesis describes control design of active magnetic bearing. Active magnetic bearing is nonlinear unstable system. This means it is not possible to use… (more)

Subjects/Keywords: aktivní magnetické ložisko; stavové řízení; continuous action reinforcement learning automata; active magnetic bearing; state control; continuous action reinforcement learning automata

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Turek, M. (2019). Inteligentní řídící člen aktivního magnetického ložiska: Inteligent Controller of Active Magnetic Bearing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/7694

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Turek, Milan. “Inteligentní řídící člen aktivního magnetického ložiska: Inteligent Controller of Active Magnetic Bearing.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/7694.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Turek, Milan. “Inteligentní řídící člen aktivního magnetického ložiska: Inteligent Controller of Active Magnetic Bearing.” 2019. Web. 08 Mar 2021.

Vancouver:

Turek M. Inteligentní řídící člen aktivního magnetického ložiska: Inteligent Controller of Active Magnetic Bearing. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/7694.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Turek M. Inteligentní řídící člen aktivního magnetického ložiska: Inteligent Controller of Active Magnetic Bearing. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/7694

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations