Patent ID: 9385624
Filing Date: 2016-07-05
CPC Classification: H02M

Claim Text:
1. A rectifier circuit which converts an AC input voltage that is received at first and second AC input terminals to DC voltage, comprising: a diode bridge that includes a first series of diodes and a second series of diodes connected in parallel to the first series of diodes, the diode bridge including a first AC input node, a second AC input node, a first rectifier output node, and a second rectifier output node, the second AC input node being connected to the second AC input terminal; an inductor connected between the first AC input terminal and the first AC input node of the diode bridge; a capacitor series circuit in which a plurality of capacitors are connected in series between the first and second output nodes of the diode bridge, the capacitor series circuit having an intermediate connection node between two of the capacitors; a first bi-directional switch capable of passing and shutting off current in a forward direction and in a reverse direction, the first bi-directional switch being connected between the first AC input node of the diode bridge and the intermediate connection node; and a second bi-directional switch capable of passing and shutting off current in a forward direction and in a reverse direction, the second bi-directional switch being connected between the second AC input terminal and the intermediate connection node, wherein the diodes in the first series of diodes are fast recovery diodes and the diodes in the second series of diodes are not fast recovery diodes, the diodes in the first series of diodes having shorter reverse recover time than the diodes in the second series of diodes, the diodes in the second series of diodes having smaller forward voltage drop than the fast recovery diodes, and wherein the first bi-directional switch is driven at a first frequency that is higher than a second frequency at which the second bi-directional switch is driven.