A Novel Method for Estimating the Position and Speed of a Winding Segmented Permanent Magnet Linear Motor

Jiaxi Liu, Jiwei Cao () and Liyi Li
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Jiaxi Liu: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Jiwei Cao: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Liyi Li: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China

Energies, 2023, vol. 16, issue 8, 1-15

Abstract: This paper presents a novel means of sensorless drive of the winding segmented permanent magnet linear motor (WS-PMLM). In order to solve the problem of the deviation of the position and speed estimation of the mover caused by the sharp changes of the inductance, flux linkage, and back electromotive force (EMF) between the segments of the WS-PMLM, a method for position estimation by the compound back-EMF is proposed to eliminate the blind spot of intersegment position estimation. In terms of speed estimation, a full-order speed observer method based on the dynamics equation is proposed, the configuration of the feedback gain of the observer is analyzed, and a simulation is used to verify that the full-order state observer (FSO) method can effectively reduce the estimated speed fluctuation in the intersegment region and that the speed estimation accuracy is ultimately improved.

Keywords: winding segmented permanent magnet linear motor; sensorless; disturbance observer; full-order state observer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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