GaN-based high gain soft switching coupled-inductor boost converter

This paper explores a coupled inductor based interleaved boost converter with soft-switching auxiliary circuit for high gain DC-DC application. The converter is capable of offering high gain with a flexible choice of turns ratio of the coupled inductor but simultaneously maintaining a reduced voltag...

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Bibliographic Details
Published in2017 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 1687 - 1693
Main Authors Roy, Jinia, Yinglai Xia, Ayyanar, Raja
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2017
Subjects
Active clamp
boost converter
Clamps
coupled inductor
GaN converter
high voltage step up
Inductors
interleaved boost
leakage energy
multi-phase converter
Schottky diodes
Soft switching
Stress
Switches
Switching circuits
wide bandgap device
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Summary:This paper explores a coupled inductor based interleaved boost converter with soft-switching auxiliary circuit for high gain DC-DC application. The converter is capable of offering high gain with a flexible choice of turns ratio of the coupled inductor but simultaneously maintaining a reduced voltage stress on the main switch. Either a passive or active clamp circuit can be used to limit the switch voltage stress arising due to the leakage of the coupled inductor. The additional auxiliary zero-voltage-transition (ZVT) circuit allows the switching node current to be diverted to an auxiliary inductor and a transistor placed across the main inductor, thus ensuring zero voltage turn-on of the main switch and improved converter efficiency. The auxiliary devices operate at zero current switching and this addition has no effect on the control of the main boost circuit. A 300 W GaN based hardware prototype with input from 30 V-40 V and 320 V output and operating at switching frequency of 200/300 kHz has been developed to validate the converter's operation in hardware.
DOI:10.1109/ECCE.2017.8095996