Minimization of Cogging Force in Fractional-Slot Permanent Magnet Linear Motors with Double-Layer Concentrated Windings

Qian Wang, Bo Zhao, Jibin Zou and Yong Li
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Qian Wang: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Bo Zhao: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Jibin Zou: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Yong Li: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China

Energies, 2016, vol. 9, issue 11, 1-10

Abstract: Permanent magnet linear motors (PMLMs) with double-layer concentrated windings generally show significant cogging forces due to the introduction of auxiliary teeth for eliminating the end-effect induced phase unbalance, even when the fractional-slot technology is applied. This paper presents a novel approach to reduce the cogging force by adjusting the armature core dimensions in fractional-slot PMLMs with double-layer concentrated windings, together with magnet skewing. It is shown that the proposed technique is capable of reducing the cogging force of the motor in an effective way, with the peak value minimized to less than 0.4% of the rated thrust force in the case study. Such a technique can also be applicable to other linear motors with appropriate changes.

Keywords: cogging force; concentrated winding; linear motor; permanent magnet motor (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: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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