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    • 4. 发明授权
    • Synchronous motor control method and synchronous motor control system
    • 同步电机控制方式和同步电机控制系统
    • US07235947B2
    • 2007-06-26
    • US11283728
    • 2005-11-22
    • Hideki TanakaShinji KajiharaTsuyoshi MaeharaTetsuya Kubota
    • Hideki TanakaShinji KajiharaTsuyoshi MaeharaTetsuya Kubota
    • H02P1/46
    • H02P21/22H02P25/024Y02P80/116
    • A desired q-axis current is determined based on a desired torque, and a desired d-axis current is determined based on the rotating speed of a synchronous motor when the terminal voltage of the synchronous motor coincides with a predetermined maximum permissible voltage to weaken a magnetic field created by the synchronous motor equivalently and to prevent the drop of the output torque of the synchronous motor. The desired d-axis current is determined based on the desired torque and the rotating speed. Therefore, the desired d-axis current can be reduced when a high torque is not necessary and undesired increase of the desired d-axis current can be prevented. Thus the synchronous motor operates efficiently, heat generation of the synchronous motor is prevented and power factor is improved.
    • 所需的q轴电流根据期望的转矩来确定,当同步电动机的端电压与预定的最大允许电压一致时,基于同步电动机的转速来确定期望的d轴电流以削弱 等效同步电机产生的磁场,并防止同步电机的输出转矩下降。 所需的d轴电流根据期望的转矩和转速来确定。 因此,当不需要高扭矩时,可以减小期望的d轴电流,并且可以防止期望的d轴电流的不期望的增加。 因此,同步电动机有效地工作,防止了同步电动机的发热,提高了功率因数。