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Modeling and Analyzing for Magnetic Field of Segmented Surface-Mounted PM Motors with Skewed Poles
Wang Huimin,Guan Peijun,Liu Shu,Wu Shuang,Shi Tingna,Guo Liyan 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.2
The skewed PM (permanent magnet) in the axial direction and the segmented PM in the circumferential direction, can reduce the cogging torque of the permanent magnet synchronous motor (PMSM). In this paper, the magnetization expression, which can be applied to diff erent circumferential sectioning modes, is derived. The quasi-3D magnetic fi eld analytical model suitable for diff erent circumferential and axial segmentation modes is proposed. The magnetic fi eld, cogging torque, back-EMF, and electromagnetic torque are obtained by the proposed modeling. The accuracy of the analytical method is verifi ed by 3D fi nite-element analysis. Finally, the modeling is used to analyze the variation of electromagnetic performance with diff erent radial skew angle and axial segments. The proposed modeling can shorten the calculation time, and analyze the variation law of motor performance with PM segmentation and skew comprehensively. It provides a reference for the design and optimization of segmented PMSM with skewed poles and has great signifi cance for improving motor performance.
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