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    • 2. 发明公开
    • MOTOR CONTROL METHOD AND MOTOR CONTROL DEVICE
    • EP4369594A1
    • 2024-05-15
    • EP21949177.6
    • 2021-07-06
    • NISSAN MOTOR CO., LTD.Renault s.a.s
    • OKUYAMA, YukaBOUARFA, Abdelkader
    • H02P27/08H02P21/00
    • H02P27/08H02P21/00
    • A motor control method for controlling a motor by transmitting a PWM signal at a predetermined carrier frequency to a power converter configured to supply power to the motor and performing switching control on the power converter, the method including, in a characteristic coordinate having a rotation speed of the motor and a torque of the motor as axes, the characteristic coordinate including a first region representing a region where the rotation speed is higher than a first predetermined rotation speed, a second region representing a region where the rotation speed is equal to or lower than the first predetermined rotation speed and the torque is higher than a predetermined torque, and a third region representing a region where the rotation speed is equal to or lower than the first predetermined rotation speed and the torque is equal to or lower than the predetermined torque, setting the carrier frequency to be a reference frequency when an operating point representing a current rotation speed and torque is included in the first region, selecting and setting the carrier frequency to be either the reference frequency or a low frequency lower than the reference frequency when the operating point is included in the second region, setting the carrier frequency to be the low frequency when the operating point is included in the third region, setting a modulation method of the PWM signal to be three-phase modulation when the operating point is included in a region other than a specific region disposed inside the third region, and setting the modulation method of the PWM signal to be two-phase modulation when the operating point is included in the specific region.