基于扩展反电动势的内置式永磁同步电机无位置传感器驱动极限环分析

This article reveals a limit cycle issue in the widely used position estimation method of interior permanent magnet synchronous motors (IPMSMs) based on extended back electromotive force (EMF). The limit cycle can result in self-oscillations in the estimated rotor position and greatly increase the estimation errors. In this article, a nonlinear model is proposed to analyze the arctangent nonlinear...