Patent ID: 9515546
Filing Date: 2016-12-06
CPC Classification: H02M,Y02B

Claim Text:
1. A power conversion device, comprising: an alternating current/direct current conversion circuit section which has a smoothing capacitor provided at an output portion and an initial charging circuit that initially charges said smoothing capacitor, and converts alternating current power into direct current power; a direct current/direct current conversion circuit section which has a switching element, and performs voltage conversion of direct current power supplied from said smoothing capacitor by controlling said switching element; and a control unit which controls input and output of said alternating current/direct current conversion circuit section and said direct current/direct current conversion circuit section, wherein said control unit performs a predetermined charging to said smoothing capacitor by said initial charging circuit and said alternating current/direct current conversion circuit section at start-up of said alternating current/direct current conversion circuit section, and starts operation of said direct current/direct current conversion circuit section after completion of charging of said smoothing capacitor by said initial charging circuit, wherein said alternating current/direct current conversion circuit section includes an inverter circuit which is connected to a single inverter or a plurality of inverters in series, said inverter having a direct current voltage supply and a plurality of semiconductor switching elements that perform charging and discharging of said direct current voltage supply, and wherein completion of charging of said smoothing capacitor is determined by voltage of said smoothing capacitor and voltage of said direct current voltage supply.