On-line observer design for sensorless vector control of LIM servo system

This study deals with the dynamic characteristic analysis of a Linear Induction Motor (LIM), using a finite element method in which a moving mesh technique is considered. The focus of this paper is to show the suitability of an on-line observer system for position sensorless control of a LIM under phase asymmetry, saturation and iron loss. Comparisons are given both from the angle of the observer and that of the proposed FEA method of a linear induction motor. The position control system is realized, and the effectiveness of the observer system for the flux angle is verified by experimental results.