INTERLEAVED ISOLATED SINGLE PHASE PFC CONVERTER MODULE FOR THREE PHASE EV CHARGER

Abstract

 

This project propose an interleaved isolated power factor correction (PFC) converter module for three phase electric vehicle (EV) chargers requiring for wide output voltage ranges. The proposed circuit is comprised of two half-bridge (HB) voltage fed isolated PFC converters with parallel input series output structure, which is operated in interleaved discontinuous conduction mode (DCM). Due to zero voltage and zero current switching (ZV-ZVS) characteristics in the primary side, it is possible to operate IGBTs at a high frequency with several tens of kHz. Also, the voltage ratings of secondary devices can be reduced so that switching devices with low turn-off losses such as MOSFETs are available. The proposed converter has only single voltage loop and the harmonic regulation is accomplished by feed forward compensation. The feasibility of the proposed PFC module has been verified with a 5kW prototype.

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