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Simple High Efficiency Full-Bridge DC-DC Converter using a Series Resonant Capacitor
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 Title & Authors
Simple High Efficiency Full-Bridge DC-DC Converter using a Series Resonant Capacitor
Jeong, Gang-Youl; Kwon, Su-Han; Park, Geun-Yong;
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 Abstract
This paper presents a simple high efficiency full-bridge DC-DC converter using a series resonant capacitor. The proposed converter achieves the zero voltage switching of the primary switches under a wide range of load conditions and reduces the high circulating current in the freewheeling mode using the leakage resonant inductance and the series resonant capacitor. Thus, the proposed converter overcomes the drawbacks of the conventional full-bridge DC-DC converter and improves its overall system efficiency. Its structure is simplified by using the leakage inductance of the transformer as the resonant inductance and omitting the DC output filter inductance. Also it can operate over a wide range of input voltages. In this paper, the operational principle, analysis and design example are described in detail. Finally, the experimental results from a 650W (24V/27A) prototype are demonstrated to confirm the operation, validity and features of the proposed converter.
 Keywords
Soft switching;Full-bridge converter;Circulating current;Leakage resonant inductance;Series resonant capacitor;
 Language
English
 Cited by
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