Influence of number of turns per coil in fractional-slot PM brushless machines

Author

Al-Habshi, S.M. ; Mohd Jamil, M.L. ; Othman, M.N. ; Jidin, A. ; Karim, Kasrul Abdul ; Zolkapli, Z.Z.

Author_Institution

Power Electron. & Drives Res. Group (PEDG), Univ. Teknikal Malaysia Melaka, Durian Tunggal, Malaysia

fYear

2014

fDate

13-14 Oct. 2014

Firstpage

146

Lastpage

151

Abstract

An investigation of electromagnetic performance on fractional-slot PM Brushless Machines which slot-number and pole-number differs by one using 2-D finite-element analysis is presented. The investigation is motivated by the rise of Unbalanced Magnetic Force (UMF) resulted by asymmetric disposition of phase windings. It can be seen that a significant reduction of UMF is possibly achieved by employing uneven number of turns per coil. However, a slight reduction of torque performance exists which could be due to higher saturation on stator magnetic path at rated condition. It is also shown that the significant reduction of UMF is mainly due to the reduction of radial force density component while the tangential force density component remains unchanged.

Keywords

brushless machines; finite element analysis; machine windings; permanent magnet machines; torque; 2D finite-element analysis; UMF reduction; asymmetric disposition; electromagnetic performance; fractional-slot PM brushless machines; phase windings; pole-number; radial force density component reduction; slot-number; stator magnetic path; tangential force density component; torque performance reduction; unbalanced magnetic force; Force; Magnetic forces; Rotors; Stator cores; Torque; Vibrations; Windings; asymmetric disposition; fractional-slot; torque; unbalanced magnetic force;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion (CENCON), 2014 IEEE Conference on

Conference_Location

Johor Bahru

Type

conf

DOI

10.1109/CENCON.2014.6967492

Filename

6967492