Abstract

This paper presents the design and implementation of a zero-voltage-transition power factor correction (PFC) converter which can achieve high power factor, low harmonic distortion, and high efficiency. Zero-voltage-transition soft-switching technique has been applied to reduce the switching losses of the auxiliary switching circuit for a single-phase AC-DC converter with unity power factor. Its operation principle and design equations have been given. A 2 kW, 200 kHz, soft-switching single-phase PFC converter has been constructed. An efficiency of 94% at rated output has been measured. Experimental results show the developed design procedure for the ZVT soft-switching PFC converter can achieve unity power factor, high efficiency, and low EMI.

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