Pump apparatus

A pump apparatus comprising:

• a motor including a shaft disposed along a central axis extending in an axial direction;
• a pump that is positioned on one side of the motor in the axial direction, is driven by the motor via the shaft, and discharges an oil;
• and
• an inverter circuit that is positioned on an outer side of the motor in a radial direction;
• wherein
• the motor includes:
• a rotor rotatable around the shaft;
• a stator disposed to face the rotor;
• and
• a housing accommodating the rotor and the stator;
• the housing includes a heat sink on an outer surface;
• the heat sink includes a first flow channel to cause the oil delivered from the pump to flow;
• and
• the inverter circuit comes into thermal contact with the heat sink.

A pump apparatus comprising:

• a motor including a shaft rotatably supported about a central axis extending in an axial direction;
• a pump that is positioned on one side of the motor in the axial direction, is driven by the motor via the shaft, and discharges an oil;
• and
• an inverter circuit that is positioned on an outer side of the motor in a radial direction;
• wherein
• the motor includes:
• a rotor rotatable around the shaft;
• a stator disposed to face the rotor;
• and
• a housing accommodating the rotor and the stator;
• the housing includes a heat sink on an outer surface;
• the heat sink includes a second flow channel to cause the oil delivered from the pump to flow;
• the motor further includes a motor side suction port to cause the oil delivered from the second flow channel into the motor;
• the second flow channel is connected to the motor side suction port;
• and
• the motor includes a third flow channel to cause the oil suctioned into the motor through the motor side suction port to flow to the stator.