Patent ID: 8760128
Filing Date: 2014-06-24
Classification: H02M,Y02B

Abstract:
1. A three-phase boost-buck power factor correction (PFC) converter, comprising: a first, a second and a third single-phase boost-buck PFC circuits, respectively receiving one-phase voltage of three-phase voltages, and respectively comprising a neutral point, an input terminal, a first output terminal and a second output terminal; a first output capacitor, having one end connected to the three neutral points, and another end connected to the three first output terminals; a second output capacitor, having one end connected to the three neutral points, and another end connected to the three second output terminals; a neutral line, wherein the three neutral points are connected to the neutral line, wherein the first, the second and the third single-phase boost-buck PFC circuits are respectively composed of two single-phase boost-buck converters independently working in a positive and a negative half cycle of an input voltage, and the two single-phase boost-buck converters are connected in parallel at an input side, and are connected in series at an output side, and each of the single-phase boost-buck converters is composed of a front-end boost circuit and a back-end buck circuit connected in cascade.