Three dimensional magnetic field computation by a coupled vector-scalar potential method in brushless DC motors with skewed permanent magnet mounts-the no-load and load results

Author

Alhamadi, M.A. ; Demerdash, N.A.

Author_Institution

Qatar Univ., Doha, Qatar

Volume

9

Issue

1

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

15

Lastpage

25

Abstract

The coupled magnetic vector potential-magnetic scalar potential (CMVP-MSP) method of computation of 3D magnetic fields by finite elements (3D-FE) is applied here to a brushless DC motor with skewed permanent magnet mounts on its rotor. Results of the CMVP-MSP and 3D-FE computation of the magnetic field and associated motor parameters (EMFs and armature inductances) are detailed in this paper. These results demonstrate vividly the three dimensional nature of the computed flux distributions, caused by the torque ripple reduction design employing skewed magnet mounts on the rotor. Experimental evidence supporting the validity of the BD-FE field computations, through comparison between computed and measured armature EMF waveforms is also provided in this paper

Keywords

DC motors; electromagnetic fields; finite element analysis; machine theory; permanent magnet motors; rotors; 3D; EMF; FEM; armature inductances; brushless DC motors; coupled vector-scalar potential method; flux distributions; machine theory; magnetic field computation; rotor; skewed permanent magnet mounts; torque ripple reduction design; Brushless DC motors; Couplings; DC motors; Distributed computing; Finite element methods; Induction motors; Magnetic fields; Magnetic flux; Permanent magnet motors; Rotors;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.282472

Filename

282472