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

作　　者：Jinghua Ji Weizhi Jiang Wenxiang Zhao Tong Liu 

机构地区：[1]School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China

出　　处：《Chinese Journal of Electrical Engineering》2024年第2期59-69,共11页中国电气工程学报（英文）

基　　金：National Natural Science Foundation of China under Projects 52377055 and 51991383.

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.

关 键 词：Eccentric permanent magnet machine sideband current harmonics electromagnetic force modulation effect fractional-slot concentrated-winding high-frequency vibration 

分 类 号：O35[理学—流体力学]