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Article type: Research Article
Authors: Cao, Donghuia | Zhao, Wenxianga; * | Liu, Tonga | Ji, Jinghuaa | Mao, Jingfengb
Affiliations: [a] School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China | [b] School of Electrical Engineering, Nantong University, Nantong 226019, Jiangsu, China
Correspondence: [*] Corresponding author: Wenxiang Zhao, School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China. E-mail: [email protected].
Abstract: Due to their advantages of high efficiency, high power density, and strong fault-tolerance ability, fractional-slot concentrated-winding permanent-magnet (FSCW-PM) machines are of particular interest in the applications such as wind power generation and electric vehicles. However, FSCW-PM machines suffer from rich winding magnetomotive force (MMF) space harmonics by the armature reaction field, which may increase eddy current loss. In this paper, a new low harmonic FSCW-PM machine is designed, which can reduce some space harmonics of low order in the air-gap flux density. A new magnetic equivalent circuit (MEC) model is developed to analyze the designed PM machine, which offers less computation time and more calculation accuracy. Finally, a prototype machine is built and the measured results verify the theoretical analysis and the developed MEC model.
Keywords: Fractional-slot concentrated-windings, magnetomotive force harmonics, dual three-phase, permanent-magnet machine, magnetic equivalent circuit
DOI: 10.3233/JAE-170019
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 56, no. 3, pp. 357-372, 2018
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