基于MRAS的内嵌式永磁同步电机弱磁区域的转速辨识

Speed Identification Method of IPMSM Based on MRAS in the Flux-weakening Field

研究了一种基于模型参考自适应法的内嵌式永磁同步电机弱磁区域的转速辨识方法。将永磁同步电机本身作为参考模型,将含有待估计参数的定子电流数学模型作为可调模型,推导出基于Popov超稳定性定理的自适应律,同时考虑了凸极电机交直轴电感不等的情况,得到了凸极式与隐极式电机均适用的转速辨识公式。仿真结果表明,推导的转速辨识公式可以准确辨识内嵌式永磁同步电机弱磁区域的转速,在系统动态过程中辨识结果响应快。

In this paper,a control method of estimating the rotor speed based on MRAS for interior permanent magnet synchronous motor（IPMSM）in the flux-weakening field is presented.The permanent magnet synchronous motor is considered as reference model and the stator current mathematical model containing estimated parameters is regarded as adjustable model,an adaptive law based on Popov stability theory is derived.Meanwhile,considering the case of non-equal quadrature axis inductance of salient pole motor,the speed identification formulae applying to both non-salient pole motor and salient pole motor are obtained.The simulation results indicate that speed identification algorithm can accurately identify the speed of IPMSM in the flux-weakening field and the identification results respond quickly in system dynamic process.