3D Analysis of Magnet Eddy Current Losses in High-Power Axial Flux Machines

IF 5.7 2区计算机科学 Q1 ENGINEERING, AEROSPACE IEEE Transactions on Aerospace and Electronic Systems Pub Date : 2025-01-14 DOI:10.1109/TAES.2025.3529801

Mehran Mirzaei

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Abstract

This article presents a 3D analytical method to model induced eddy currents in the surface-mounted permanent magnets of axial flux machines. High-power and high-speed permanent magnet machines with enhanced power density are used for electrical power and propulsion systems in aerospace and airplane applications. The magnet eddy current losses are mainly caused by the time harmonics of the inverter and converter, which cause the overheating and demagnetization of magnets. A sophisticated computational model is developed to calculate induced eddy currents in the permanent magnets. The radial and circumferential magnet segmentations are considered in the 3D analytical method, which are used for magnet loss reduction. Two high-speed and high-power axial flux permanent magnet machines with distributed winding are chosen to analyze eddy currents and simulations of the magnet losses. The reaction fields of induced eddy current in the permanent magnets are also considered in 3D analytical modeling. The analytical calculation results of magnet losses are compared with the 3D finite element method to evaluate the accuracy.

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大功率轴流式电机磁体涡流损耗的 3D 分析

本文提出了轴向磁通机永磁体表面感应涡流的三维解析方法。大功率高速永磁电机具有增强的功率密度，用于航空航天和飞机应用的电力和推进系统。磁体涡流损耗主要是由逆变器和变换器的时间谐波引起的，它引起磁体过热和退磁。建立了精密的永磁体感应涡流计算模型。在三维分析方法中考虑了径向和周向的磁体分割，用于降低磁体损耗。选取两台高速大功率分布式绕组轴向磁通永磁电机进行涡流分析和磁体损耗仿真。在三维解析建模中还考虑了永磁体中感应涡流的反应场。将磁体损耗的解析计算结果与三维有限元法进行了比较，以评价其精度。

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来源期刊

IEEE Transactions on Aerospace and Electronic Systems 工程技术-电信学

CiteScore

7.80

自引率

13.60%

发文量

433

审稿时长

8.7 months

期刊介绍： IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment. These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control.