基于MATLAB的无刷直流电机调速系统的建模与仿真

从无刷直流电机的数学模型出发,提出了一种无刷直流电机控制系统仿真建模的方法.该方法在Matlab/Simulink中,把独立的功能模块和s函数相结合,构建了无刷直流电机系统的仿真模型.系统采用双闭环控制:速度环采用PID控制,根据滞环电流跟踪型PWM逆变器原理实现电压控制.利用该模型分析了电机的动静态性能,得到了电机运行时的转速、转矩、相电流和反电动势曲线.仿真结果与理论分析一致,验证了该方法的合理性和有效性,为实际电机控制系统的设计和调试提供了新的思路.

Modeling and Simulation of BLDCM Speed Control System Based on Matlab

Based on the mathematical model of the Brushless DC motor(BLDCM),a method for modeling and simulation of BLDCM speed control system is developed in this paper.In Matlab/Simulink,by the combination of the isolated functional blocks and S-functions,the model of BLDCM system could be established.In the double loop of control system,a PID controller was adopted in the speed loop and a current controller was completed in the current loop on the principle of hysteresis current track PWM inverter.The static and dynamic performance of BLDCM were simulated,and the speed,torque,phase current and back electromotive force curves are demonstrated.