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A zero-voltage zero-current switching power conversion system for fuel cell  

Son, Gyoung-Jong (전남대 전기공학과)
Song, Sung-Geun (전남대 전기공학과)
Moon, Chae-Joo (목포대 전기공학과)
Kim, Kwang-Heon (전남대 전기공학과)
Lim, Young-Cheol (전남대 전기공학과)
Choi, Joon-Ho (전남대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.11, no.4, 2006 , pp. 385-394 More about this Journal
Abstract
The application areas of traditional push-pull converters are limited because the voltage stress of switches is high (twice of the input voltage). But the push - pull converter topology is suitable for unregulated low-voltage to high-voltage power conversion such as the fuel cell. This paper presents a novel power converter structure that is very suitable for the DC/DC converter in fuel cell systems. Based on this structure, a ZVS- ZCS push-pull converter is proposed. The switches of the proposed push-pull converter can operate under ZVS or ZCS condition with the help of a new passive clamping circuit. The passive clamping techniques solves the voltage overshoot problem. Because the buck converter circuit operates at twice the synchronous switching frequency of the push-pull converter, the peak current in the current-fed inductor and transformer is reduced. The operation principle of the proposed converter is analyzed and verified by simulations and experimental results. A 1 kW DC/DC converter was implemented with DSP TMS320F2812, from which experimental results have shown that efficiency improvement and surge suppression can be achieved effectively.
Keywords
ZVS-ZCS push-pull converter; fuel cell; passive clamping technique; synchronous switching frequency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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