Patent ID: 9667129
Date: 2017-05-30
CPC Classifications: H02H,H02M

Claim:
1. A power conversion device, comprising: a power conversion device main body, including a plurality of drive circuits, each configured to on/off drive one of the semiconductor switching elements of the power conversion device main body, wherein each of the drive circuits includes an overcurrent protection circuit, which is configured to stop the on/off drive of the one semiconductor switching element that said each drive circuit is configured to on/off drive, when a current flowing through the one semiconductor switching element exceeds a first current limit value, and the drive circuit of the lower arm of each half bridge circuit further includes an alarm signal generation circuit configured to the drive circuit of the upper arm of each half bridge circuit is devoid of any alarm signal generation circuit that generates two alarm signals respectively when a current flowing through the semiconductor switching element of the upper arm exceeds the first current limit value, and when a current flowing through the free wheeling diode connected in reverse parallel to the semiconductor switching element of the upper arm exceeds the second current limit value.