PWM变换器控制方式的选择

The Select of the PWM-Convertor Control Mode

直流脉宽调速由于电路结构简单、低速性能好和损耗小等优点在直流调速系统中得到广泛使用,其中脉宽调制变换器的性能决定了调速系统的特性。H型可逆PWM变换器是常用的脉宽调制变换器,它有双极式控制、单极式控制和受限单极式控制三种控制方式,且不同的控制方式有不同特点。由于不同的系统电机的负载特性不同,通过合理选择PWM控制器的控制方式,可以改善系统的特性。

The PWM DC SR system has been widely used in DC SR system because of its simple circuit structure and low speed,low power consumption.It＇s the performance of PWM convertor that has three control modes,namely ambipolar control,monopole control and limited monopole control,and different control method has different characteristics.As the motor in different system has different load speciality,it can be improved by selecting the PWM control mode.