Analytical Calculation of 3-D Rotor Eddy Current Loss in High-Speed Permanent Magnet Motors Considering the Multi-Layer Rotor Structure

IF 2.1 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Magnetics Pub Date : 2025-02-04 DOI:10.1109/TMAG.2025.3538877

Qicheng Dai;Xiao Liu;Shoudao Huang

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引用次数: 0

Abstract

This article presents an analytical method to calculate 3-D rotor eddy current loss (RECL) in high-speed permanent magnet motors (HSPMSMs) by correcting each harmonic loss component of 2-D RECL. First, a 3-D analytical model of a multi-layer rotor, accounting for the armature reaction field, is established based on the equivalent current sheet. The 3-D governing equation is derived in stationary coordinate, and stator current is periodically extended in the axial direction. The end factors for correcting each time-spatial harmonic RECL are derived as the ratio of the RECLs for infinite and finite rotor lengths. To account for the influence of slotting effect and the magnetic field induced by the permanent magnet (PM), 3-D RECL is obtained by correcting the series formed 2-D RECL calculated using an accurate subdomain model. The accuracy of the proposed method is then verified through finite element analysis (FEA) at different motor sizes and frequencies. Finally, a rotor-locked test is carried out on an HSPMSM prototype, validating the effectiveness of the proposed analytical method.

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来源期刊

IEEE Transactions on Magnetics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

14.30%

发文量

565

审稿时长

4.1 months

期刊介绍： Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The IEEE Transactions on Magnetics publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.