双闭环可逆直流脉宽调速系统的MATLAB/Simulink仿真模型。系统无静差、电流超调量σi≤5 、可逆运行。额定负载启动到额定转速时的转速超调量σn≤10 。-Double Closed Loop Reversible MATLAB/Simulink simulation model DC PWM speed control system. No static error system, current overshoot σi≤5 , reversible operation. Rated