Mitsubishi Electric Corporation

Toshiba Mitsubishi-electric Industrial Systems Corporation

Tomoaki Sekiguchi

Hidetoshi Ikeda

Hiroki Ishii

Satoshi Mizogami

A motor controller calculates a motor torque command based on motor speed and causes a motor to generate a torque corresponding to the motor torque command, to drive a machine load coupled to the motor. The motor controller includes a speed compensator that makes, when a speed compensation torque is calculated based on the motor speed, frequency characteristics of the speed compensation torque for the motor speed exhibit a low frequency cutoff characteristic so that steady-state gain in frequency response is less than a maximum gain value. A torque adder generates a motor torque command by adding to the existing motor torque command an externally input feedforward torque signal and the speed compensation torque.

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Tokyo, Japan

Tomoaki Sekiguchi