Analytical Calculation of Stray Magnetic Field in Interior Permanent Magnet Synchronous Motor Under Static Eccentricity Considering Nonlinear and Nonuniform Magnetic Saturation

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

IEEE Transactions on Magnetics Pub Date : 2024-11-22 DOI:10.1109/TMAG.2024.3504497

Hongwei Cui;Conggan Ma;Yanyan Wang;Xiangyi Li;Yuling He;Zhaojie Shen;Zhaoqi Ji;Puwei Wang

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引用次数: 0

Abstract

Nonlinear magnetic saturation occurs in the rotor magnetic bridge area because of the complex rotor structure in the interior permanent magnet synchronous motor (IPMSM), and the degrees of nonlinear magnetic saturation in the rotor region corresponding to different magnetic pole are quite different under the state of the stator-rotor eccentricity, that makes it difficult to calculate the stray magnetic field of the IPMSMs under eccentricity. This article proposes an analytical method of the stray magnetic field in IPMSMs considering influence of asymmetric and nonuniform saturation. First, a dual iteration technique of magnetic saturation is developed to solve the air-gap magnetic field of the IPMSMs under static eccentricity and the effect of eccentricity on the complex relative permeability (CRP) is also considered. Second, extended the air-gap domain vector magnetic potential to the outer air domain using the subdomain method to solve the stray magnetic field under static eccentricity. Then, the effects of different materials, different magnetic bridge structures and different static eccentricities on the no-load leakage coefficient are analyzed. Finally, the effectiveness of the proposed analytical calculation method (ANA) is verified by a special eccentricity simulation device, the computational error is 3.92% compared to the experimental results. The computational speed is improved by 91.3% compared to the finite element method (FEM).

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考虑非线性和非均匀磁饱和的内置永磁同步电机静偏心率下杂散磁场解析计算

由于内置永磁同步电机转子结构复杂，转子磁桥区域会发生非线性磁饱和，不同磁极对应的转子区域在定转子偏心状态下的非线性磁饱和程度差异较大，这给偏心状态下永磁同步电机杂散磁场的计算带来了困难。本文提出了一种考虑不对称和不均匀饱和影响的永磁同步电动机杂散磁场分析方法。首先，提出了一种磁饱和双迭代技术，求解了静偏心作用下的永磁转子气隙磁场，并考虑了偏心对复合相对磁导率的影响。其次，利用子域法将气隙域矢量磁势扩展到外空气域，求解静偏心下的杂散磁场；然后分析了不同材料、不同磁桥结构和不同静偏心率对空载泄漏系数的影响。最后，通过专用偏心仿真装置验证了所提解析计算方法（ANA）的有效性，与实验结果相比，计算误差为3.92%。与有限元法相比，计算速度提高了91.3%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.