说明：  做了一个电流滞环比较器的PMSM矢量控制仿真，是按照《现代电机控制技术》（王成元，夏加宽，孙宜标）P136上的那幅图做的
(A current hysteresis comparator PMSM Vector Control simulation, in accordance with modern motor control technology " (PROCEEDINGS OF THE PROCEEDINGS OF THE SUN Yi-standard) P136 had been plans to do)