POWER CONVERSION DEVICE, MOTOR CONTROL DEVICE, AND AIR CONDITIONER

Abrégé

A power conversion device (10) for converting AC power to DC power, the device being provided with: a first switching main circuit (101) having a series circuit of a first switching element (Q1) and a second switching element (Q2) connected between a positive-side DC bus bar (104) and a negative-side DC bus bar (105); a second switching main circuit (102) having a series circuit of a third switching element (Q3) and a fourth switching element (Q4) connected between the positive-side DC bus bar (104) and the negative-side DC bus bar (105); reflux diodes (D1, D2, D3, D4) connected in parallel with the first, second, third, and fourth switching elements respectively; a first reverse voltage application circuit (A1) for applying a reverse voltage to the reflux diode connected in parallel with the first switching element; and a second reverse voltage application circuit (A2) for applying a reverse voltage to the reflux diode connected in parallel with the second switching element.

Classes IPC  ?

• H02M 7/219 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 7/12 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode