永磁同步电机无位置传感器的研究

Research on Position Sensorless of Permanent Magnet Synchronous Motor

PMSM（Permanent Magnet Synchronous Motor,永磁同步电机）具有较小的体积、简单的结构、较小的损耗、小的转动惯量、性能可靠、对环境的适应能力强、控制和维护方便等优点，逐渐在交流驱动系统中得到广泛的应用。应用PMSM无位置传感器控制不但能降低系统成本，而且可以提高系统的可靠性。本文主要研究不同速度范围的无位置传感器技术相结合的复合控制方法，从而实现了PMSM驱动系统在全速度范围的无位置传感器控制。

Permanent Magnet Synchronous Motor （PMSM） owing to its smaller size, simple structure, smaller loss, small moment of inertia, reliable performance, strong ability to adapt to the environment, easy control and maintenance, etc., has gradually widely used in AC drive system. The position sensorless PMSM control system can not only reduce costs, but also improve the reliability of the system. In this paper, we study the composite control method combined with position sensorless technology with different speed range, so as to realize the position sensorless control of PMSM drive system in full speed range.