Title of Paper:ZVS Push-pull High-frequency-link DC/AC Converter With Voltage Clamping

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Affiliation of Author(s):自动化学院

Journal:Zhongguo Dianji Gongcheng Xuebao

Abstract:One zero voltage switch (ZVS) push-pull high frequency link DC/AC converter with voltage clamping is proposed. Firstly, the evolution of the proposed DC/AC converter is presented. Then, the switching strategy is proposed and the steady working principle is analyzed in detail. The average model of the proposed converter is discussed by using the state-spacing- averaging approach. By contrast, it is found that the proposed converter and the phase-shift full-bridge DC/AC converter have similar characteristics. Switches S1, S2can realize ZVS turn-on easily and the auxiliary switch S3can achieve ZVS turn-on under enough energy stored in leakage inductor. Meanwhile, the voltage of S3can be clamped at Uinwith a clamp diode. In addition, the cycloconverter can also achieve ZVS commutation easily. In addition, the proposed topology solves the problem of hard-switching that resulting in high switching losses. Finally, one prototype of 500VA/ 48VDC/110V/50Hz AC is developed and the test results show that the theoretical analyses and principle are correct. The efficiency of the prototype can reach 91.5%. © 2017 Chin. Soc. for Elec. Eng.

ISSN No.:0258-8013

Translation or Not:no

Date of Publication:2017-03-20

Co-author:Wu, Qunfang,Xu, Jialin,Xiao Lan,Yuan, Yisheng

Correspondence Author:Wu, Qunfang,wangqin