SR机器有重大扭矩波纹，特别是当经营在唯一脉冲电压控制方式。
SR machines have a significant torque ripple, especially when operated in single-pulse voltage control mode.
另一种采用电压控制方式，通过电压的高低进行电机的转速控制，电机的反馈信号通过驱动器反馈到数控系统进行位置控制。
Another kind of the voltage control mode, through the high and low voltage on motor speed control, motor feedback signal through the drive to the numerical control system feedback position control.
二级电压控制是一种新型的电压控制方式，它首先是将整个电力系统分成若干彼此电气距离较远且相互近似解耦的控制区域。
Secondary Voltage Control is a new way of voltage control, firstly the power system is divided into many control areas whose electric distance is remote.
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