Control device for rotary electric machine unit

A control device for a rotary electric machine unit including:

• a rotary electric machine;
• and an oil supply unit including a gear mechanism that is driven by the rotary electric machine, at least a part of the gear mechanism being immersed in oil, the oil supply unit supplying the oil to a coil included in the rotary electric machine by operating the gear mechanism, the control device comprising:
• an information acquisition unit configured to acquire information related to an air density in the coil and information related to a voltage applied to the rotary electric machine;
• an insulation determination unit configured to determine whether or not dielectric breakdown occurs in the coil based on the information related to the air density and the information related to the voltage acquired by the information acquisition unit, and configured to determine whether or not an insulation state of the coil is needed to be maintained by supplying the oil to the coil;
• a drive instruction unit configured to drive the oil supply unit, when the insulation determination unit determines that dielectric breakdown occurs in the coil and determines that the insulation state of the coil is needed to be maintained by supplying the oil to the coil;
• and
• an application voltage limitation unit configured to limit the voltage applied to the rotary electric machine, when the rotary electric machine is driven in accordance with an instruction from the drive instruction unit.