中文说明：直流交流电机的调速，包括开环调速、闭环调速，矢量调速，直接转矩调速，转速频率差调速，附件为其部分源代码
English Description：
DC AC motor speed regulation, including open-loop speed regulation, closed-loop speed regulation, vector speed regulation, direct torque speed regulation, speed and frequency difference speed regulation, accessories are part of its source code