Patent ID: 8432710

Claim:
A power conversion apparatus comprising: an AC power supply; and a rectification circuit which converts AC power inputted from the AC power supply into DC power, the rectification circuit having a configuration in which series circuits, each of which includes a rectifying device and a semiconductor switching device connected in series and whose number corresponds to a number of phases of an input AC power, are connected in parallel between a positive-side line and a negative-side line, the AC power supply being connected through inductance devices to AC input points corresponding to connection points between the rectifying devices and the semiconductor switching devices of the series circuits respectively; wherein the AC input points of the series circuits and a point serving as ground potential are connected through noise suppressing series circuits in each of which a switch unit and a capacitor are connected in series, and the switch unit of each of the noise suppressing series circuits is controlled to be on at a timing when the semiconductor switching device connected to the noise suppressing series circuit switches at a high frequency, and to be off at another timing.