Patent ID: 8338998

Claim:
An electronic circuit-integrated motor apparatus comprising: a motor that includes a tubular motor case forming a shell, a stator mounted radially inside the motor case and wound with multi-phase coils, a rotor mounted radially inside the stator, and a shaft rotating together with the rotor; a heat sink that is extended in the same direction as a direction of a centerline of the shaft from an end wall of the motor case; and an electronic circuit that is mounted on the motor case, oriented in the direction of the centerline of the shaft, and positioned toward the heat sink to provide drive control of the motor, wherein the electronic circuit includes a plurality of semiconductor modules, each of which has a semiconductor chip for selecting a coil current flowing in the multi-phase coils and is vertically disposed in contact with a side wall surface of the heat sink such that a line perpendicular to a semiconductor chip surface is not parallel to the centerline of the shaft, the heat sink has a plurality of side wall surfaces that define different planes, the semiconductor modules are disposed, one by one, relative to the plurality of side wall surfaces in direct or indirect contact with the side wall surfaces, the heat sink includes a side wall that is installed in a standing manner around the centerline of the shaft, the electronic circuit includes a choke coil, which is positioned on a power supply line for the semiconductor modules, and the choke coil is positioned radially inside the side wall.