The soft starter is a kind of new equipment for controlling squirrel cage induction motor. The paper compares AC pressure regulating and speed control with ordinary one in the start-up procedure, and simulates it with MATLAB.%软启动器是一种用于控制鼠笼式异步电动机的新设备,具有传统启动方法无法比拟的优势.软启动器一般以大功率双向晶闸管构成交流调压电路,通过控制晶闸管的触发角来调节输出电压.就软启动中使用的大功率双向晶闸管三相交流调压电路的特点进行分析与普通启动方式进行比较,并用MATLAB进行仿真.
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