基于MRAS的IPMSM速度自适应全阶状态观测器的设计

Design and Simulation of IPMSM Speed-Adaptive Full Order State Observer

为提高内嵌式永磁同步电动机(IPMSM)在无速度传感器情况下的动态调速性能,选取转子坐标系下的定子电流、定子磁链作为状态变量,定子电压和电流分别作为输入和输出量设计出线性缓变的全阶状态观测器,并从观测器稳定性分析出发构造速度自适应律,通过自适应律输出更新全阶状态观测器的缓变值——转速,完成基于参考模型自适应(MRAS)的全阶线性缓变速度自适应状态观测器设计方案。利用该方案输出的磁链和转速值结合IPMSM直接转矩控制(DTC)系统进行仿真实验,结果表明:所设计的基于MRAS的IPMSM速度自适应状态观测器转速和转子位置跟随性能良好,具有良好的动稳态特性。

In order to improve the dynamic speed regulation performance of the sensor-lessinterior permanent magnet synchronous motor（IPMSM）,a full-order linear slow variable speed adaptive state observer based on model reference adaptive system（MRAS）was designed byusingstator current and stator flux in the rotor coordinate system as state variables andstator voltage and current as input and output respectively to design a full-order state observer with linear slow change,then attainingthe speed adaptive rulebased on the stability analysis of the observer,and finally updating the slow variable value of the full order state observer（rotor speed）using the rule.Simulation experiment of IPMSM direct torque control（DTC）system was carried out combiningflux linkage and rotor speed,both of which were outputs of the observer.The results show that the speed adaptive flux observer so designed has high speed and precise rotor position identification performance as well has good dynamic stability characteristics.