说明：  基于dsPIC30F4011的交流感应电机变频调速控制器设计，针对节能降耗的目的，开发了一套具有变频调速的电机控制系统。该系统通过工控机、电位器和外部专用仪表，对电机控 制芯片dsPIC30F4011的MCPWM模块调制出的三相正弦波的频率进行设定和改变，来实现变频调速控制，达到了预期的 控制效果
(Based on the dsPIC30F4011 the AC induction motor variable frequency speed controller design for energy saving purposes, developed a motor control system with frequency control. The system through IPC, potentiometer and external special instrument, a three-phase motor control chip the the dsPIC30F4011 the MCPWM module modulated sine wave frequency setting and change to achieve frequency conversion control, to achieve the desired control effect)