Patent ID: 6437998
Filing Date: 2002-08-20
Classification: H02M

Abstract:
A rectifying circuit for converting an AC voltage with a plurality of phases into a DC voltage, comprising:a plurality of bi-directional switch circuits, one switch circuit for one phase including first and second series circuits formed of two switching devices and two diodes and connected together in parallel, a plurality of reactors, each being connected to a junction between the first series circuit of each bi-directional circuit and to an AC input terminal of each phase, a plurality of first diodes, each being connected to a junction between the first and second series circuit of each bi-directional switch circuit and to a positive DC output terminal, a plurality of second diodes, each being connected to a junction between the first and second series circuit of each bi-directional switch circuit and to a negative DC output terminal, and two capacitors connected in series between the positive and negative DC output terminals, all of the internal junctions of the second series circuits of the bi-directional switch circuits being connected to a junction between the two capacitors.