DC to AC converter used as inverter apparatus for electric vehicle, has PCB with gate short-circuit detection unit that compares derivation current of gate of semiconductor device with a terminal voltage of gate

摘要

Converter (19) has electrical current supply circuit (112) connected to PCB that protects and controls semiconductor device e.g. insulated gate bipolar transistor (IGBT). Circuit and PCB are placed on intelligent module. PCB has gate short-circuit detection unit to compare derivation current of gate of semiconductor device with terminal voltage of gate equal to short-circuit current. Semiconductor device is cut when comparison result is negative.