电流滞环跟踪PWM控制的双闭环调速系统仿真

The Simulation of Double Closed Loop Speed Controlled System with Current Hysteresis Loop Tracking PWM Control Technology

电流滞环跟踪PWM控制技术能较好地得到三相对称正弦波电流,以电流滞环跟踪PWM控制器为内环,转速外环调节器选用PI调节器,建立异步电动机双闭环调速系统。建立系统主电路及控制电路进行仿真模型,主电路由异步电动机模块、电动机测量单元模块、逆变器模块、直流电源、负载模块等组成,控制电路由转速给定信号、转速调节器、电流给定信号及电流滞环跟踪控制器等组成。仿真得到电流、转速及电磁转矩曲线,验证了方法的有效性。

Current hysteresis tracking PWM control technologycan get bettersymmetrical three-phase sine wave current. Based on the current hysteresis tracking PWM control technology, de- sign a double closed loop speed control system of asynchronous motor. In inner loop use the hysteresis tracking PWM controller, adopt PI regulator for speed outer loop, then set up the main circuit and the control circuit＇ s simulation model. The main circuit is consisted of asynchronous motor module, the measurement unit of motor, inverter module, DC power supply, load module and so on. The control cir- cuit mainly involves the speed given signal model, the speed regulator, the current given signal model and current hysteresis tracking controller. Then simulate, and gives the current curve, speed curve and electromagnetic torque curve, which verify the effectiveness of the proposed method.