一种永磁同步电机的滑模控制

A Sliding-mode Control for Permanent Magnet Synchronous Motor

永磁同步电动机(PMSM)是一个多变量、非线性、强耦合的系统,传统的PID调节器不能满足高性能的控制要求.本文在同步电机数学模型的基础上首先提出自适应的滑模观测器,以在静止坐标下的电压、电流为变量计算电机转速,并利用滑模变结构控制的方法对q轴电流进行检测,利用Lyapunov证明了方法的收敛性.仿真结果表明:该方案比传统的PID控制具有超调小,过渡时间短、鲁棒性强的特点,表明了该策略的有效性.

Permanent magnet synchronous motor （PMSM） is a multivariable nonlinear system with strong coupling. Traditional PID controller is widely used in PMSM system, but it can＇t meet the need of high performance. By using the voltage and current of the d-q coordinate, an adaptive sliding mode observer for estimating the speed of rotor is presented in this article and the q-axis current is measured on-line. The convergence condition is proved by laypunov theory. Simulation results show the improved performance with the advantages of fastness rapid response and good robustness is superior to the traditional PID con- troller.