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    • 12. 发明授权
    • Synchronous motor torque control device
    • 同步电机转矩控制装置
    • US4931715A
    • 1990-06-05
    • US156289
    • 1988-02-16
    • Robert H. LeeAlexander LevranChi MakGerald L. SmithJacek J. Marcinkowski
    • Robert H. LeeAlexander LevranChi MakGerald L. SmithJacek J. Marcinkowski
    • H02P25/02
    • H02P25/024
    • A method is described for controlling synchronous motor torque, utilizing a three-phase switch connected in a circuit to the input of a polyphase synchronous motor, and a switch control circuit. The switch control circuit senses the AC voltages input to the synchronous motor and produces signals that open and close the three-phase switch in phase with the input motor voltage, producing positive motor torque during normal operation. If input AC power is lost, the switch control circuit acts to prevent a reverse flow of high current from the motor from entering the power source bus. When input power, after a short time, returns, the switch control circuit acts to close the three-phase switch in such a manner as to permit only real power applied to the synchronous motor and thus positive torque that accelerates the motor speed and quickly restores the motor to synchronism with the input power source.
    • 描述了一种用于控制同步电动机转矩的方法,利用连接到多相同步电动机的输入的电路中的三相开关和开关控制电路。 开关控制电路检测输入到同步电机的交流电压,产生与输入电机电压同相开关三相的信号,正常运行时产生正电机转矩。 如果输入交流电源丢失,则开关控制电路用于防止来自电动机的高电流的反向流动进入电源总线。 当输入功率在短时间内返回时,开关控制电路以闭合三相开关的方式使得仅允许施加到同步电动机的实际功率,从而使正转矩加速电机速度并快速恢复 电机与输入电源同步。