Analysis and Verification of a Wide Input Voltage PWM Converter with Variable Windings

Bor-Ren Lin and Ji-Wei Chang
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Bor-Ren Lin: Department of Electrical Engineering, National Yunlin University of Science and Technology, Yunlin 640, Taiwan
Ji-Wei Chang: Department of Electrical Engineering, National Yunlin University of Science and Technology, Yunlin 640, Taiwan

Energies, 2020, vol. 13, issue 7, 1-21

Abstract: A three-leg pulse-width modulation converter with auxiliary windings is provided and investigated to realize wide voltage operation and zero voltage switching characteristics on power switches. The presented converter has three converter legs on the input-side and two sets of winding turns on the output-side. Owing to the on/off states of the three converter legs and the two sets of secondary winding turns, the proposed converter can be operated under three different equivalent circuits to have wide input voltage operation from 30V ~ 240V ( V in,max = 8 V in,min ). Compared with the multi-stage converters to realize wide input voltage operation, the proposed circuit topology has fewer circuit components and a simple control algorithm. Conventional duty cycle control with phase-shift between each converter leg is adopted to regulate load voltage and also accomplish zero voltage switching on active switches. The presented three-leg converter is tested with a laboratory circuit. Finally, experiments testify to the performance and validity of the presented converter.

Keywords: pulse-width modulation; zero voltage switching; power converters; three-leg converters (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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