Investigation of Eccentric PM on High-frequency Vibration in FSCW PM Machine Considering Force Modulation Effect

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外文摘要：This study investigates the negative influence of an eccentric permanent-magnet(PM)design on high-frequency electromagnetic vibration in fractional-slot concentrated-winding(FSCW)PM machines.First,an analytical expression for the sideband current harmonics was derived using the double Fourier series expansion method.Then,the characteristics of the flux-density harmonics are studied from the perspective of the space-time distribution and initial phase relationship.The influence of the eccentric PM design on high-frequency electromagnetic and concentrated forces was studied based on the electromagnetic force modulation effect.Consequently,an eccentric PM design is not conducive to reducing the 2pth-order high-frequency electromagnetic forces.Finally,two FSCW PM machines with conventional and eccentric PM designs are manufactured and tested to verify the theoretical analysis.The results show that the eccentric PM design worsens high-frequency vibrations.

外文关键词：

Eccentric permanent magnet machinesideband current harmonicselectromagnetic force modulation effectfractional-slot concentrated-windinghigh-frequency vibration

作者：

Jinghua Ji、Weizhi Jiang、Wenxiang Zhao、Tong Liu

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作者单位：

School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of China

项目编号：

under Projects 5237705551991383

出版年：

2024

DOI：

10.23919/CJEE.2024.000063

中国电气工程学报(英文)

ISSN：

年,卷(期)：2024.10(2)