Studies Characteristics of Bridgeless Interleaved Boost PFC Circuit

Abstract

With power rating enhancing unceasingly, the increasing demand for highpower PFC converters is more strong, but the traditional boost PFC (Power Factor Correction, PFC) converter is only suitable for small and medium-sized power occasions. By using the interleaved technology, the current stress of switches can be decreased, the ripple of the input current and switching losses can also be reduced, and the power rating of the PFC converter can be improved. Interleaved boost PFC is very suitable for high power occasions. Inductance influence on the characteristics of interleaved parallel boost PFC circuit is studied. So different material inductance and inductance value are designed, and the characteristics of interleaved parallel boost PFC circuit are studied in this paper. Experimental results are included for a prototype boost converter converting universal ac input voltage (85-265 V) to 400 V dc output at up to 1 kW load.