Patent ID: 8411472

Claim:
A power conversion device, comprising: a PWM converter converting a first three-phase AC voltage to a DC voltage; a PWM inverter converting said DC voltage to a second three-phase AC voltage; an AC input filter transmitting said first three-phase AC voltage and blocking a voltage at a carrier frequency generated in said PWM converter; and an AC output filter transmitting said second three-phase AC voltage and blocking a voltage at a carrier frequency generated in said PWM inverter, said AC input filter including first to third reactors having one terminals receiving said first three-phase AC voltage and other terminals connected to said PWM converter, and first to third capacitors having one electrodes connected to the one terminals of said first to third reactors, respectively, said AC output filter including fourth to sixth reactors having one terminals receiving said second three-phase AC voltage and other terminals connected to a load circuit, and fourth to sixth capacitors having one electrodes connected to the other terminals of said fourth to sixth reactors, respectively, other electrodes of said first to sixth capacitors being connected in common, said first to sixth reactors being composed of a six-leg six-phase iron core reactor or a seven-leg six-phase iron core reactor.