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|1. (WO2018078851) ELECTRIC MOTOR DRIVE DEVICE|
|Applicants:||MITSUBISHI ELECTRIC CORPORATION
|Title:||ELECTRIC MOTOR DRIVE DEVICE|
An overcurrent protection circuit (60) of an electric motor capable of selecting any of a plurality of wire connection states has a plurality of determination circuits (62, 63), a combining circuit (66), and an invalidation circuit (65). The combining circuit (66) combines the comparison results obtained in the plurality of determination circuits. The invalidation circuit (65) invalidates a part of the comparisons performed in the plurality of determination circuits. The overcurrent protection circuit has one output, so that only one terminal suffices for receiving the output of the combining circuit for controlling driving and stopping of an inverter. In addition, since the overcurrent protection circuit is configured by hardware, fast protection can be performed.