Design and experimental verification of an 18-slot/10-pole fractional-slot surface-mounted permanent-magnet machine

Author

Wang, Kangping ; Zhu, Z.Q. ; Ombach, Grzegorz ; Koch, Martin ; Zhang, Shaoting ; Xu, Jie

Author_Institution

Dept. of Electron. & Electr. Eng., Sheffield Univ., Sheffield, UK

fYear

2013

fDate

12-15 May 2013

Firstpage

287

Lastpage

294

Abstract

This paper investigates the torque characteristics of an 18-slot/10-pole fractional-slot surface-mounted permanent-magnet (SPM) machine and presents its comparison with conventional 9-slot/10-pole and 12-slot/10-pole SPM machines by analytical and two-dimensional (2-D) finite element analysis (FEA). The winding factors of the 18-slot/10pole machine are firstly analyzed, and then, its back-EMF, average torque, cogging torque, and torque ripple are investigated. In addition, the influence of magnetic saturation due to stator current excitation on the average torque and torque ripple is also studied by 2-D FEA. The results show that the torque ripple can be suppressed while the average torque can be improved in the 18-slot/10-pole SPM machine compared with the 12-slot/10-pole SPM machine, while the unbalanced magnetic force in the 9-slot/10-pole SPM machine can be eliminated. Finally, the experimental results are given for validation of theoretical analyses and FE results.

Keywords

finite element analysis; permanent magnet machines; torque; 2D FEA; SPM machine; analytical finite element analysis; average torque; back-EMF; cogging torque; fractional-slot surface-mounted permanent magnet machine; magnetic saturation; stator current excitation; torque characteristics; torque ripple; unbalanced magnetic force; winding factors; Harmonic analysis; Iron; Rotors; Stator windings; Torque; Windings; Average torque; Slot/pole number combinations; Surface-mounted machine; Torque ripple; Unbalanced magnetic force; Winding topologies;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines & Drives Conference (IEMDC), 2013 IEEE International

Conference_Location

Chicago, IL

Print_ISBN

978-1-4673-4975-8

Electronic_ISBN

978-1-4673-4973-4

Type

conf

DOI

10.1109/IEMDC.2013.6556266

Filename

6556266