中文说明：根据永磁同步电机数学模型建立的电机仿真模型，并使用PI控制器进行双环控制，达到调节永磁同步电机转速的目的。
English Description：
The simulation model of PMSM is established based on the mathematical model of PMSM, and PI controller is used for double loop control to achieve the purpose of adjusting the speed of PMSM.