异步电动机定子磁链观测方法研究

Study on the Observation Method for Flux Linkage of the Stator of Asynchronous Motor

分析了传统异步电动定子磁链观测器——纯积分器的局限性,采用全阶闭环磁链状态观测器实现了定子磁链的观测,并提出一种简单方便的极点配置方法,完成了状态观测器的极点配置工作。理论分析和仿真结果表明,全阶闭环磁链状态观测器不但能够准确观测定子磁链,有效克服传统磁链观测器的固有缺陷,而且能够有效地抑制电机参数变化对磁链观测的影响。

The limitation of the traditional flux linkage observer of the stator of asynchronous motor,the pure integrator is analyzed.By adopting full-order closed-loop flux linkage state observer,the flux linkage of the stator is implemented.In addition,a simple method of pole allocation is proposed for allocating the poles for state observer.The theoretical analysis and simulation result show that such method can accurately observes the flux linkage of the stator,and effectively overcome the inherent defects of traditional observer,and also suppresses the influence on flux linkage observation because of the parameters change of motor.