Power electronic device overcurrent detection circuit for bridge type converter

The invention discloses a power electronic device overcurrent detection circuit for a bridge converter, which comprises a signal acquisition circuit and a signal comparison circuit, and is characterized in that the signal acquisition circuit is connected with a to-be-detected power electronic switching device to measure a terminal voltage signal of the power electronic switching device; the input of the signal comparison circuit is connected with the signal acquisition circuit, the output of the signal acquisition circuit is compared with a specific voltage, whether overcurrent occurs or not is judged through the output of a comparator, and main devices used in the overcurrent detection circuit comprise a resistor, a capacitor, an operational amplifier, the comparator, a diode and a voltage stabilizing diode. The circuit has the advantages of simple structure, small size, low cost, low power consumption and the like. 本发明公开了一种用于桥式变流器的电力电子器件过电流检测电路，包括：信号采集电路和信号比较电路两部分，所述信号采集电路与待检测的电力电子开关器件连接，测量电力电子开关器件的端电压信号；所述