Drive device

A drive device comprising:

• an electric motor that includes:
• a motor housing which includes a motor case formed in a tubular shape;
• a stator which is fixed to the motor housing;
• a plurality of motor wires which are wound around the stator;
• a rotor which is configured to be rotated in response to energization of the plurality of motor wires;
• and
• a shaft which is configured to be rotated integrally with the rotor;
• and
• a controller that includes:
• a circuit board on which a plurality of electronic components configured to control a drive operation of the electric motor are mounted;
• and
• a controller housing that receives the circuit board, wherein:
• the controller is fixed to one end portion of the motor case which faces in an axial direction of the electric motor;
• the plurality of electronic components include:
• a plurality of heat-generating components which are configured to generate heat when the plurality of heat-generating components are energized;
• and
• a capacitor;
• the plurality of heat-generating components include a plurality of switching devices of an inverter;
• at least one of the plurality of switching devices is mounted on one surface of the circuit board opposite to the electric motor;
• and
• among the plurality of electronic components, one or more electronic components, which include the at least one of the plurality of switching devices and are mounted on the one surface of the circuit board opposite to the electric motor, are sealed in a state where the one or more electronic components are embedded in the controller housing made of an electrically insulating material along with the circuit board including the one surface of the circuit board opposite to the electric motor.