无传感器永磁同步电机矢量控制系统概述

永磁同步电机因其自身的一些优点，在国防、工农业生产和日常生活等方面获得越来越广泛的应用。同时无传感器永磁同步电机的矢量控制方法，也成为研究中的一个热点。文章首先简单介绍了永磁同步电机数学模型和矢量控制的基本原理，在此基础上又集中介绍了近十几年来提出的多种估算永磁同步电机转子位置和转速的方法，如利用反电动势的估算方法，观测器方法，模型参考自适应方法，高频注入方法等等。对其中较重要的方法进行了详细的分析，比较了各种方法的优缺点，并介绍了不同方法所适用的条件和场合。

The State of art of Sensor-less Vector Control of PMSM

Permanent Magnet Synchronous Motors (PMSM) have been used more and more widely for drive applications because of their several inherent advantages. Also, a significant attention in the development of sensor less strategies has been paid to eliminate the position and speed sensors. In this paper, after a brief introduction of the mathematic model and the vector control of PMSM, various methods of estimating the rotor position and speed are presented, such as the method based on the back EMF estimation technique, observer method, MRAS method, injection of a high frequency signal method and so on. The advantages and disadvantages of these methods are also put forward.