Patent ID: 8823303
Filing Date: 2014-09-02
Classification: H02M,Y02B

Abstract:
1. An alternating-current direct-current converter, comprising: a rectifier connected to an alternating current power supply via a reactor; two capacitors connected in series between output terminals of said rectifier; a first switch connected between one input terminal of said rectifier and a connection point of said capacitors; a second switch connected between the other input terminal of said rectifier and the connection point of said capacitors; diodes inversely parallelly connected with said capacitors; a voltage detector which detects terminal voltages of said capacitors; a current detector which detects a current input from said alternating current power supply; and control means which drives and controls said first switch and said second switch, wherein said control means drives and controls said first switch and said second switch such that the terminal voltages of said capacitors are fixed and a power supply power factor is improved using an active power component and a reactive power component obtained by conversion of detection results of said current detector and detection results of said voltage detector.