Semiconductor motor drive circuit with end of life detection

摘要

In the motor driving system, a unit to predict the separation of the wire is built into the power semiconductor module thereby to predict that the time of separation of the wire is approaching before the actual separation of the wire. Thus, the time to replace the power semiconductor module used for power devices such as the motor driving system is clarified to prevent an operation failure of the motor driving system from occurring. The power semiconductor module ( 1 ) has a power semiconductor chip ( 2 ) mounted thereon, and the power semiconductor chip ( 2 ) includes a main circuit wire ( 4 ) and a dummy wire ( 5 ) connected to the electrode ( 3 ) of the power semiconductor. The dummy wire is set to a lower connection strength than the main circuit wire.