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A Three-Phase ZVZCS DC-DC Converter for Fuel Cell Applications
작성자 관리자 작성일 2009-08-21
논문집명 IEEE Power Electronics Specialist Conference 발행년도 2008. 06
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28.A Three-Phase ZVZCS DC-DC Converter for Fuel Cell Applications.pdf

Hyungjoon Kim, Changwoo Yoon, Sewan Choi, “A Three-Phase ZVZCS DC-DC Converter for Fuel Cell Applications”

Abstract : In spite of having many advantages such as low switch voltage and easy implementation, the voltage-fed DCDC converter has been suffering from problems associated with large transformer leakage inductance due to high transformer turn ratio when it is applied to low voltage high current step-up application such as fuel cells. This paper proposes a new three-phase voltage-fed DC-DC converter which is suitable for low voltage high current applications. The required transformer turn ratio is as low as that of the current-fed converter owing to ǻ-Y connection. ZVZCS for all switches are achieved over wide load range without affecting effective duty cycle. A clamp circuit not only clamps the surge voltage but reduces the circulating current flowing through the high current side, resulting in significantly reduced conduction losses. The duty cycle loss can also be compensated by operation of the clamp switch. Experimental waveforms from a 1.5kW prototype are provided.

Area of Interest : High Power DC-DC converter, Fuel Cells, ZVZCS, Three-Phase DC-DC converter.