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Author
Title Implementation of DC-DC converter with maximum power point tracking control for thermoelectric generator applications
URL
Publication Date
Discipline/Department Electrical Energy Conversion
University/Publisher KTH
Abstract A heavy duty vehicle looses approximately 30-40 % of the energy in the fuel as waste heat through the exhaust system. Recovering this waste heat would make the vehicle meet the legislative and market demands of emissions and fuel consumption easier. This recovery is possible by transforming the waste heat to electric power using a thermoelectric generator. However, the thermoelectric generator electric characteristics makes direct usage of it unprotable, thus an electric power conditioner is necessary. First a study of dierent DC-DC converters is presented, based on that the most suitable converter for thermoelectric application is determined. In order to maximize the harvested power, maximum power point tracking algorithms have been studied and analyzed. After the investigation, the single ended primary inductor converter was simulated and implemented with a perturb and observe algorithm, and the incremental conductance algorithm. The converter was tested with a 20 W thermoelectric generator, and evaluated.The results show that the incremental conductance is more robust and stable compared to the perturb and observe algorithm. Further on, the incremental conductance also has a higher average eciency during real implementation.
Subjects/Keywords Thermoelectric generator; Waste heat recovery; DC-DC converter; single ended primary inductor converter; Maximum power point tracking; Perturb and observe; Incremental conductance
Language en
Country of Publication se
Record ID oai:DiVA.org:kth-109705
Repository diva
Date Indexed 2020-01-03

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…observe algorithm model. . . . . . . . . . . . . . . . . . . The incremental conductance algorithm model. . . . . . . . . . . . . . . . The mapping model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The SEPIC-converter

…3.2 Control of DC-DC converters . . . . . . . . . 3.3 The Buck-Boost Converter . . . . . . . . . . 3.4 Cuk Converter . . . . . . . . . . . . . . . . . 3.5 SEPIC converter . . . . . . . . . . . . . . . . 3.6 Full bridge converter

…3.7 Continuos and Discontinuos conduction mode 3.8 Design of converters . . . . . . . . . . . . . . 3.8.1 Buck-Boost converter . . . . . . . . . 3.8.2 Cuk converter

…11 11 11 13 14 16 18 19 20 20 21 . . . . . . . . . . . . . . . vii . . . . . . . . . . . . . . . . . . . . . . . . . 3.8.3 SEPIC converter . . . 3.8.4 Fullbridge converter . 3.9 Dimensioning of TEG module 3.10 Summary…

…22 23 24 25 4 Maximum power point control 27 4.1 MPPT control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.1.1 Perturb and observe . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.1.2 Incremental conductance…

…settings . . . . . . . . . . 5.7 MPPT algorithms . . . . . . . . . . 5.8 Efficiency mapping . . . . . . . . . . 6 Implementation 6.1 Current sensor . . 6.2 Voltage sensor . . . 6.3 MOSFET-switch . 6.4 Complete converter 6.5 Converter control…

…characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 TEG unit connected to a converter and load. . . . . . . . . . . . . . . . . 2.10 Typical energy path for a combustion engine[2]. . . . . . . . . . . . . . . . 2.11 Basic…

…model of a TEG module implemented in a HDV electrical system. . 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 Ideal switching DC converter. . . . . . . . . . . . . . . . . . . . . . . . . . Comparator generating PWM…

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