Electric motor apparatus for electric power steering and electric power steering apparatus

An electric motor apparatus for electric power steering, the electric motor apparatus comprising:

• an electric motor comprising:
• a rotor in which a shaft is rotatably supported;
• a stator that is disposed outside the rotor;
• a power feeding part that is connected to the stator or the rotor and supplies electric power;
• and
• a housing for supporting the rotor and the stator;
• and
• a control unit comprising:
• a driving circuit for supplying electric power to the electric motor;
• a bonding part bonded to the power feeding part of the electric motor;
• a control circuit for controlling the driving circuit;
• and
• a case for covering the driving circuit and the control circuit,
• wherein the electric motor is formed integrally with the control unit,
• the control unit and the electric motor are attached to a gear box for reducing a speed of rotation of the electric motor and are disposed coaxially with a shaft of the gear box,
• the control unit is disposed between the gear box and the electric motor,
• the power feeding part of the electric motor is bonded to the bonding part of the control unit inside the housing or the case through an opening part disposed in the housing and/or the case,
• the power feeding part is bonded to the bonding part using a screw,
• the electric motor and the control unit are integrally assembled by passing the shaft through the control unit after the electric motor and the control unit are separately assembled, and
• the electric motor is configured to be separated from, the control unit, in a state in which the electric motor apparatus for electric power steering is attached to the gear box, after the screw is removed through the opening and a close contact between the power feeding part of the electric motor and the bonding part of the control unit is released.