Motor control device and electric power steering apparatus
AssigneeNidec Elesys Corporation
InventorAkihiro Iwasaki
Life of this patent
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Abstract
A motor control device includes a resin cover, a control board on which at least a computer is mounted, a power board on which at least an inverter circuit and electrolytic capacitors are mounted, and a heat sink that radiates heat generated by the control board and heat generated by the power board, and controls a motor. The motor control device is electrically connected to the motor, and the resin cover, the control board, the power board, and the heat sink are disposed in order of the power board, the heat sink, the control board, and the resin cover in an axial direction of the motor from a motor side of the motor control device.
Claims20
A motor control device that controls a motor, the motor control device comprising:
- a resin cover defined by integrally molding an external power supply connector to be connected to an electric power supply source, and a plurality of external signal connectors with a resin material;
- a control board on which at least a computing device is mounted;
- a power board on which at least an inverter circuit and a plurality of electrolytic capacitors are mounted;
- and
- a heat sink that radiates heat generated by the control board and heat generated by the power board;
- wherein
- the motor control device is electrically connected to the motor;
- the resin cover, the control board, the power board, and the heat sink are disposed in order of the power board, the heat sink, the control board, and the resin cover in an axial direction of the motor from a motor side of the motor control device;
- the plurality of electrolytic capacitors are mounted on a surface of the power board on a motor side of the power board;
- and
- the power board is covered by a housing of the motor.
Dependencies are inferred from the claim text.