Dynamic analysis of radial force density in brushless DC motor using 3-D equivalent magnetic circuit network method

Author

Hur, Jin ; Chun, Yon-Do ; Lee, Ju ; Hyun, Dong-seok

Author_Institution

Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

3142

Lastpage

3145

Abstract

The distribution of radial force density in brushless permanent magnet DC motors is not uniform in the axial direction. The analysis of radial force density has to consider the 3-D shape of teeth and overhang, because the radial force density causes vibration and acts on the surface of teeth inconsistently. For the analysis, a new 3-D equivalent magnetic circuit network method is used to account for the rotor movement without remeshing. The radial force density is calculated and analyzed by Maxwell stress tensors and discrete Fourier transforms (DFT) respectively. The results of the 3-D equivalent magnetic circuit method have been compared with the results of 3-D FEM

Keywords

Maxwell equations; brushless DC motors; discrete Fourier transforms; electromagnetic forces; equivalent circuits; machine theory; magnetic circuits; permanent magnet motors; rotors; 3-D equivalent magnetic circuit network method; Maxwell stress tensors; brushless PM DC motor; discrete Fourier transforms; dynamic analysis; overhang; permanent magnet; radial force density distribution; rotor movement; teeth; vibration; Brushless DC motors; DC motors; Magnetic analysis; Magnetic circuits; Permanent magnets; Shape; Stators; Stress; Teeth; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717736

Filename

717736