永磁电机无速度传感器的优化控制技术

Optimal Control Technology of Speed Sensorless for PMSM

永磁电机具有速度快、可靠性高等优点,在交流伺服系统中得到了广泛的应用,为了获得更优的永磁电机控制效果,提出一种新型的永磁电机无速度传感器优化控制技术。首先对永磁电机无速度传感器的工作原理进行分析,采用状态观测器测量转子的速度和位置,然后根据定子电流和参考电压估计反电动势,对轴向位移和旋转速度进行控制,最后采用仿真实验对其性能进行测试。结果表明,在各种条件下,所提控制技术均能够保证无速度传感器稳定运行,使得电机具有更优的工作性能。

The permanent magnet motor has advantages of high speed and high reliability which has been widely used in the AC servo system. In order to obtain a better control effect of the permanent magnet motor, a novel control technology of speed sensorless for the permanent magnet motor is presented in this paper. Firstly, the working principle of the permanent magnet motor without speed sensor is analyzed, and speed and position of rotor are measured by the state observer. Secondly the back EMF is estimated according to the stator current and reference voltage to control the axial displacement and rotation speed.Finally a simulation experiment is used to test the perfor- mance. The results show that the proposed can ensure stable operation of the speed sensor under all kinds of conditions, so the motor has better performance.