Voltage-Fed Push-Pull PWM Converter Featuring Wide ZVS Range and Low Circulating Loss with Simple Auxiliary Circuit

Manyuan Ye; Pinggang Song; Song Li; Yunhuang Xiao

Voltage-Fed Push-Pull PWM Converter Featuring Wide ZVS Range and Low Circulating Loss with Simple Auxiliary Circuit

Vol. 18, No. 4, pp. 965-974, Jul. 2018

10.6113/JPE.2018.18.4.965

Push-pull

Simple auxiliary circuit

Voltage-fed

Zero-voltage-switching

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Abstract

A new zero-voltage-switching (ZVS) push-pull pulse-width modulation (PWM) converter is proposed in this paper. The wide ZVS condition for all of the switches is obtained by utilizing the energy stored in the output inductor and magnetizing inductance. As a result, the switching losses can be dramatically reduced. A simple auxiliary circuit including two small diodes and one capacitor is added at the secondary side of a high frequency (HF) transformer to reset the primary current during the circulating stage and to clamp the voltage spike across the rectifier diodes, which enables the use of low-voltage and low-cost diodes to reduce the conducting and reverse recovery losses. In addition, there are no active devices or resistors in the auxiliary circuit, which can be realized easily. A detailed steady operation analysis, characteristics, design considerations, experimental results and a loss breakdown are presented for the proposed converter. A 500 W prototype has been constructed to verify the effectiveness of the proposed concept.

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Cite this article

[IEEE Style]

M. Ye, P. Song, S. Li, Y. Xiao, "Voltage-Fed Push-Pull PWM Converter Featuring Wide ZVS Range and Low Circulating Loss with Simple Auxiliary Circuit," Journal of Power Electronics, vol. 18, no. 4, pp. 965-974, 2018. DOI: 10.6113/JPE.2018.18.4.965.

[ACM Style]

Manyuan Ye, Pinggang Song, Song Li, and Yunhuang Xiao. 2018. Voltage-Fed Push-Pull PWM Converter Featuring Wide ZVS Range and Low Circulating Loss with Simple Auxiliary Circuit. Journal of Power Electronics, 18, 4, (2018), 965-974. DOI: 10.6113/JPE.2018.18.4.965.