Passive Lossless Snubbers Using the Coupled Inductor Method for the Soft Switching Capability of Boost PFC Rectifiers

Ho-Sung Kim; Ju-Won Baek; Myung-Hyo Ryu; Jong-Hyun Kim; Jee-Hoon Jung

Passive Lossless Snubbers Using the Coupled Inductor Method for the Soft Switching Capability of Boost PFC Rectifiers

Vol. 15, No. 2, pp. 366-377, Mar. 2015

10.6113/JPE.2015.15.2.366

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Abstract

In order to minimize switching losses for high power applications, a boost PFC rectifier with a novel passive lossless snubbercircuit is proposed. The proposed lossless snubber is composed of coupled inductors merged into a boost inductor. This methodcompared with conventional methods does not need additional inductor cores and it reduces extra costs to implement a softswitching circuit. Especially, the proposed circuit can reduce the reverse recovery current of output diode rectifiers due to thecoupling effect of the inductor. During turn-on and turn-off operating modes, the proposed PFC converter operates under softswitching conditions with high power conversion efficiency. In addition, the performance improvement and analysis of the operatingeffects of the coupled inductors were also presented and verified with a 3.3 kW prototype rectifier.

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Cite this article

[IEEE Style]

H. Kim, J. Baek, M. Ryu, J. Kim, J. Jung, "Passive Lossless Snubbers Using the Coupled Inductor Method for the Soft Switching Capability of Boost PFC Rectifiers," Journal of Power Electronics, vol. 15, no. 2, pp. 366-377, 2015. DOI: 10.6113/JPE.2015.15.2.366.

[ACM Style]

Ho-Sung Kim, Ju-Won Baek, Myung-Hyo Ryu, Jong-Hyun Kim, and Jee-Hoon Jung. 2015. Passive Lossless Snubbers Using the Coupled Inductor Method for the Soft Switching Capability of Boost PFC Rectifiers. Journal of Power Electronics, 15, 2, (2015), 366-377. DOI: 10.6113/JPE.2015.15.2.366.