Drive device and drive system

A control method of a drive device,

• the drive device including a motor, an inverter that drives the motor by switching a plurality of switching elements, and an electronic control unit,
• the control method comprising:
• switching, by the electronic control unit, the plurality of switching elements between first pulse width modulation control and second pulse width modulation control,
• the first pulse width modulation control being a control of generating a first pulse width modulation signal for the plurality of switching elements by comparison of modulated waves of voltage commands in phases based on a torque command for the motor with a carrier voltage, and performing switching of the plurality of switching elements,
• the second pulse width modulation control being a control of generating a second pulse width modulation signal for the plurality of switching elements based on a modulation factor of a voltage and a voltage phase based on the torque command and the number of pulses per unit period of an electrical angle of the motor, and performing switching of the plurality of switching elements;
• and
• switching, by the electronic control unit, the plurality of switching elements between the first pulse width modulation control and the second pulse width modulation control at irregular time intervals.