基于滑模控制的永磁同步电动机q轴电流在线检测

Aq-Axis Current Measure Through Estimating Rotor Speed for PMSM Based on Sliding-Mode Control

以静止坐标下电机的电压、电流为变量,提出了一种自适应的滑模观测器来计算电机的转速。然后在获得电机转速的基础上利用滑模变结构控制的方法对q轴电流进行在线检测,同时利用Lyapunov证明了所提方法的收敛性。仿真结果表明,该方案具有超调小、过渡时间短、鲁棒性强的特点,表明了该策略的有效性。

By using the voltage and current of the d-q coordinate, an adaptive sliding mode observer for estimating the speed of rotor was presented and the q-axis current was measured online. The convergence condition was proved by Lya- punov theory. Simulation results show the improved performance with the advantages of fastness rapid response and good ro- bustness is superior to the traditional PID controller.