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|1. (WO2018198739) MOTOR DRIVE DEVICE, AND ELECTRIC POWER STEERING DEVICE|
|Title:||MOTOR DRIVE DEVICE, AND ELECTRIC POWER STEERING DEVICE|
A motor drive device for driving a motor, wherein: the motor drive device has a control unit for outputting a drive signal instructing the amount by which a motor is to be driven, a drive unit including a plurality of inverter circuits for supplying to the motor a current supplied from the external power supply on the basis of the drive signal outputted from the control unit, and a first temperature detection unit for detecting the temperatures of each of the plurality of inverter circuits; and when a first temperature difference is equal to or greater than a prescribed difference value, the first temperature difference being obtained by subtracting, from one of the temperatures of the plurality of inverter circuits detected by the first temperature detection unit at a prescribed point in time, the temperature of another of the inverter circuits, the control unit outputs to the one inverter circuit a drive signal instructing a second driving amount that is less than a first driving amount for the prescribed point in time.