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논문 기본 정보

자료유형
학술대회자료
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전력전자학회 전력전자학회 학술대회 논문집 전력전자학회 2004년도 전력전자학술대회 논문집(Ⅰ)
발행연도
2004.7
수록면
341 - 345 (5page)

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초록· 키워드

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A high efficiency and low device stress voltage and current clamping ZVS PWM asymmetrical half bridge converter is proposed in this paper. To achieve the ZVS of power switches along the wide load range, the transformer leakage inductor L<SUB>lkg</SUB> is increased. Then, to solve the problem related to ringing in the secondary rectifier caused by the resonance between L<SUB>lkg</SUB> and rectifier junction capacitors, the proposed converter employs a voltage and current clamping cell, which helps voltages and currents of rectifier diodes to be clamped at the output voltage and output current, respectively. Therefore, no RC-snubber for rectifier diodes is needed and a high efficiency as well as low noise output voltage can be realized. In addition, since all energy stored in L<SUB>lkg</SUB> is transferred to the output side, the circulating energy problem can be effectively solved and duty loss does not exist. The operational principle, theoretical analysis, and design considerations are presented. To confirm the operation, validity, and features of the proposed circuit, experimental results from a 425W, 385-170Vdc prototype are presented.

목차

Abstract
1. Introduction
2. Structure and features of proposed converter
3. Operational principles of proposed circuit
4. Analysis of the proposed converter
5. Topological extensions of the proposed circuit
6. Experimental results
7. Conclusion
Acknowledgement
References

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