说明：  本文详细介绍了永磁同步交流电机的矢量控制理论，并根据矢量控制理论运用DSP实现了对永磁同步交流伺服电机的电流、速度和位置的三闭环控制，最后给出实验结果及其分析。
(This paper describes a permanent magnet synchronous AC motor vector control theory, and using DSP to achieve the three closed-loop control of the permanent magnet synchronous AC servo motor current, speed and position of the vector control theory. Finally, the experimental results and their analysis.)