Jtekt Corporation

Yusuke Natsume

Yuto Sato

Shigetoshi Yamaguchi

Kota Sei

A control device calculates a voltage command value for an inverter by executing feedback control that causes a current value of a three-phase motor to follow a current command value for the motor. The control device includes a compensation calculator that calculates, using a rotation angle of the motor, a correction voltage added to the voltage command value to compensate for torque ripple of the motor. The correction voltage is a sine wave that is in antiphase with the torque ripple, and is obtained by adding together a real part, a cosine wave component, and an imaginary part, a sine wave component that have the same frequency. The compensation calculator is configured to calculate amplitudes of the cosine wave component and the sine wave component from the current command value and a rotation speed of the motor.

Motor control device, and motor control method

A motor control device includes a board that is provided at an end of a motor including winding groups of two systems and controls supply of electric power to the winding group independently for each system. The board includes two areas that are partitioned by a boundary line passing through the center of the motor when viewed in an axial direction of the motor. A power supply terminal connector, an inverter circuit, and a motor terminal connector are sequentially arranged along the boundary line when viewed in the axial direction of the motor. The motor terminal connector is provided such that a straight line perpendicular to a direction in which motor terminals are arranged and the boundary line form an acute angle.

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Okazaki, Japan

Yusuke Natsume