Influence of axial asymmetrical rotor in PMAC motor operation

Author

Bi, Chao ; Hla, Phyu Nu ; Yu, YinQuan ; Soh, Cheng Su ; Jiang, Quan

Author_Institution

Data Storage Inst., A*Star, Singapore, Singapore

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

5

Abstract

To the permanent magnetic (PM) AC motor with the rotor aligned asymmetrically in axial direction, the motor magnetic field is axial-asymmetric. This asymmetric field generates unbalanced magnetic pull (UMP), and the analysis shows that, the UMP value varies in the motor operation. Analysis shows also that, if the number of stator slot is odd, the UMP center varies in the motor operation. The paper presents an analytical model for analyzing the effects of the UMP induced by the axial-asymmetrical rotor. The numerical results of PMAC motors are also presented, and they confirm the effectiveness of the analytical UMP model presented.

Keywords

AC motors; magnetic fields; permanent magnet motors; rotors; stators; PMAC motor; UMP; asymmetric field; axial asymmetrical rotor; motor magnetic field; permanent magnetic AC motor; stator; unbalanced magnetic pull; AC motors; Finite element methods; Magnetic separation; Magnetoacoustic effects; Permanent magnet motors; Rotors; Stators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073966

Filename

6073966