基于磁链叠加高频信号的PMSM速度位置观测法

摘要

A novel sensorless control method of permanent magnate synchronous motor(PMSM)under zero-low speed range based on high frequency signal injection into the stator flux was presented. By using the estimated electromagnetic torque and stator flux linkage,the load angle and the position error angle could be observed. Finally, the rotor position and speed could be estimated with a phase-locked loop principle(PLL). Theoretical analysis and the simulation were carried out. The result shows the new method can observe the rotor position and speed exactly at low speed,and achieve a good dynamic performance.%针对永磁同步电动机能够在零低速条件下实现无传感器运行,提出了一种高频定子磁链注入方法来对电机运行中的速度与位置信号进行提取.在控制系统本身要对转矩以及定子磁链观测的基础上,利用该优势建立负载角观测器并推导位置误差角计算方法,最后使用锁相环原理提取出转子的位置及运行转速.仿真表明,该方法可以实现在永磁同步电机低速下转子速度位置的准确观测,同时在转速与负载突变的情况下也有稳定的观测结果.