本例程通过应用矢量控制技术，Matlab内置的矢量模块，搭建了速度闭环控制系统，采用PI控制器。本例程在低速阶段仿真效果较好，在中高速阶段仿真效果较差，有待进一步完善。-This routine is through the application of vector control technology, Matlab built-in vector module, built speed closed-loop control system, using the PI controller. This routine is better in the low speed stage simulation, simulation results in poor high-speed stages, be further improved.