To reduce oscillation and a noise level by providing an inverter for supplying energization so that an electrical angle may be higher than 120 degrees and equal to 180 degrees or lower, and a torque control means for controlling the generated torque of a motor so as to meet torque generated by the motor and load torque generating a load factor.
A torque control means 11 controls energization to a motor 4 so as to meet the rotational acceleration or the rotational speed of the rotor of a motor 4, and reduces a rotational pulse. The torque control means 11 controls the rotational acceleration of the rotor so as to become zero in order to control the pulse. The torque control means 11 difference the rotational speed using the rotor acceleration detecting means 12, and detects the rotational acceleration. An acceleration control means 13 outputs a torque command correction amount which bring the acceleration to zero, to an inverter 3.
NARASAKI KAZUNARI
TAZAWA TORU
AZUMA MITSUHIDE
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