Zero-Voltage and Zero-Current Switching Interleaved Two-Switch Forward Converter

In this paper, a novel zero-voltage and zero-current switching (ZVZCS) interleaved two switch forward converter is proposed. By using a coupled-inductor-type smoothing filter, a snubber capacitor, the parallel capacitance of the leading switches and the transformer parasitic inductance, the proposed converter can realize soft-switching for the main power switches. This converter can effectively reduce the primary circulating current loss by using the coupled inductor and the snubber capacitor. Furthermore, this converter can reduce the reverse recovery loss, parasitic ringing and transient voltage stress in the secondary rectifier diodes caused by the leakage inductors of the transformer and the coupled inductance. The operation principle and steady state characteristics of the converter are analyzed according to the equivalent circuits in different operation modes. The practical effectiveness of the proposed converter was is illustrated by simulation and experimental results via a 500W, 100 kHz prototype using the power MOSFET.

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Cite this article

[IEEE Style]

E. Chu, J. Bao, Q. Song, Y. Zhang, H. Xie, Z. Chen, Y. Zhou, "Zero-Voltage and Zero-Current Switching Interleaved Two-Switch Forward Converter," Journal of Power Electronics, vol. 19, no. 6, pp. 1413-1428, 2019. DOI: 10.6113/JPE.2019.19.6.1413.

[ACM Style]

Enhui Chu, Jianqun Bao, Qi Song, Yang Zhang, Haolin Xie, Zhifang Chen, and Yue Zhou. 2019. Zero-Voltage and Zero-Current Switching Interleaved Two-Switch Forward Converter. Journal of Power Electronics, 19, 6, (2019), 1413-1428. DOI: 10.6113/JPE.2019.19.6.1413.