永磁同步电机无位置传感器控制系统研究

Study of Permanent Magnet Synchronous Motor Sensorless Control System

对永磁同步电机无位置传感器控制系统在实际工程应用中存在的技术难点进行分析,提出一种滑模观测器和正弦电压驱动启动相结合的方法,以解决工程应用中低速稳定运行和快速启停的问题,并在系统中采用抗饱和比例积分(PI)控制器以避免系统出现饱和现象.最后,通过试验验证了所提方法的有效性和所开发无位置传感器控制系统的可用性,未来该系统可用于注塑机等机电设备永磁同步电机控制的实际工程中.

The sensorless control system for the permanent magnet synchronous motor （PMSM） in the real-world engineering applications is studied. A method, which combines the sliding mode observer （SMO） and sinusoidal voltage drive start, is proposed to solve the problems of the steady running at low speed and fast start-stop. In addition, the anti-windup PI controller is designed to avoid the windup phenomenon of the system. Finally, the effectiveness of the proposed method and the feasibility of the developed sensorless control system are validated by experiment. The system is capable to controlling the permanent magnet synchronous motor of the injection molding machines and other electrical equipments in future.