A sensorless vector control system of permanent magnet synchronous motor based on line active disturbance rejection controller

This paper presents a reduced line active disturbance rejection controller (LADRC) for closed-loop speed, current, and speed estimation of a permanent magnet synchronous motor (PMSM) to achieve sensorlss vector control system. The controller is not overly dependent on the accurate mathematical model of motor. The disturbance is observed and then compensated by LADRC, which lead to good dynamic and static performance and robust to load. In order to estimate rotor speed and position, a speed observer based on LADRC is also designed in this paper. Compared to a conventional ADRC, the LADRC reduces the number of arithmetic operations. Simulation and experimental result show good dynamic and static performance of PMSM speed and current regulation is achieved by this method.