Analysis of exterior-rotor BLDC motor considering the eddy current effect in the rotor steel shell

Author

Park, Seung-Chan ; Kwon, Byung-H ; Yoon, Hee-Soo ; Won, Sung-Hong ; Kang, Young-Gyu

Author_Institution

Res. Inst. of Eng. & Technol., Hanyang Univ., Ansan, South Korea

Volume

35

Issue

3

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

1302

Lastpage

1305

Abstract

This paper describes the effect of eddy currents generated in the rotor steel shell of an exterior-rotor type permanent magnet brushless DC motor of which the rotor is revolving at a high speed. A two dimensional time-stepped finite element method is used to analyze the electromagnetic field and compute motor performance. The conductivity of the rotor steel shell is modified to consider the transverse edge effect. As a result, the effect of eddy currents is shown by comparing the analysis results between when the proposed method is used and when the method it is not

Keywords

brushless DC motors; eddy currents; electromagnetic fields; finite element analysis; machine theory; permanent magnet motors; rotors; 2-D time-stepped finite element method; conductivity; eddy current; electromagnetic field; exterior-rotor permanent magnet brushless DC motor; motor performance; rotor steel shell; transverse edge effect; Brushless DC motors; DC generators; Eddy currents; Electromagnetic analysis; Electromagnetic fields; Finite element methods; Magnetic analysis; Performance analysis; Rotors; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.767200

Filename

767200