The Mechanism Analysis on Open-Circuit Back EMF in Fractional-Slot Concentrated Winding Permanent Magnet Machines Using Air-Gap Field Modulation Theory

被引：6
|
作者：
Zhang, Hengliang [1 ]
Yin, Hang [1 ]
Hua, Wei [2 ]
Zhu, Xiaofeng [3 ]
Gerada, David [4 ]
Wang, Bo [1 ]
机构：
[1] Southeast Univ, Sch Elect Engn, Nanjing 210096, Peoples R China
[2] Southeast Univ, Yancheng Inst New Energy Vehicles, Nanjing 210096, Peoples R China
[3] Nanjing Normal Univ, Sch Elect & Automat Engn, Nanjing 210023, Peoples R China
[4] Univ Nottingham, Power Elect Machines & Control Grp, Nottingham NG7 2RD, England
来源：
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION | 2021年 / 7卷 / 04期
基金：
美国国家科学基金会;
关键词：
Harmonic analysis; Stator windings; Windings; Power capacitors; Rotors; Air gaps; Power harmonic filters; Air-gap field modulation (AFM); fractional-slot concentrated winding; permanent magnet machines; rotor-permanent magnet (PM) machines; stator-PM machines; PM MACHINES; ELECTROMAGNETIC PERFORMANCE; EXPERIMENTAL-VERIFICATION; FLUX; DESIGN; STATOR;
D O I：
10.1109/TTE.2021.3066290
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This article investigates the production mechanism of the open-circuit back-electromotive force (back EMF) in fractional-slot concentrated winding permanent magnet (FSCW-PM) machines based on the air-gap field modulation (AFM) theory. The relationship between spatial PM field harmonics and temporal back EMF harmonics is discovered by using a general model, which is suitable for both stator-PM and rotor-PM machines. The analysis results reveal that the FSCW-PM machines produce their open-circuit back EMF on the basis of AFM, which means that each back EMF harmonic is induced not only by a specific single spatial field harmonic but also by several different spatial field harmonics. Furthermore, a general winding factor calculation formula for FSCW-PM machines is derived together with the general calculation formula of all back EMF harmonics. Finally, the analysis is verified numerically by the finite element method and experimentally.
引用
收藏
页码：2658 / 2670
页数：13
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