Title :
An adaptive sliding observer for sensorless control of synchronous motors
Author :
Chen, Zhiqian ; Tomita, Mutuwo ; Doki, Shinji ; Okuma, Shigeru
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
An adaptive sliding observer is proposed for position and velocity sensorless control of synchronous motors. Unlike conventional sensorless control methods, which are only applicable for one or two types of synchronous motors, the proposed method is a universal sensorless control for all the three types of synchronous motors. This is because it is based on the newly derived extended electromotive force model, which fuses position information both from the permanent magnet and from the stator inductance. Stability of the proposed observer is guaranteed easily, because it is constructed on a linear model. of the motor. Sliding mode is applied for the current estimation, under which the order of observer´s error equation is reduced. This makes the stability analysis easier so that robust position and velocity estimations might be achieved by a proper pole assignment. Simulation results show that the proposed method is very effective
Keywords :
adaptive control; machine control; observers; permanent magnet motors; stability; stators; synchronous motors; variable structure systems; PM motor; adaptive sliding observer; extended electromotive force model; observer error equation; permanent magnet; position control; sensorless control; sliding mode; stability analysis; stator inductance; synchronous motors; velocity control; Adaptive control; Force sensors; Fuses; Inductance; Permanent magnets; Programmable control; Sensorless control; Stability; Stators; Synchronous motors;
Conference_Titel :
Control Applications, 2001. (CCA '01). Proceedings of the 2001 IEEE International Conference on
Conference_Location :
Mexico City
Print_ISBN :
0-7803-6733-2
DOI :
10.1109/CCA.2001.973956