Analysis of irreversible magnet demagnetization in line-start motors based on the finite-element method

Author

Kang, Gyu-Hong ; Hur, Jin ; Nam, Hyuk ; Hong, Jung-Pyo ; Kim, Gyu-Tak

Author_Institution

Dept. of Electr. Eng., Changwon Nat. Univ., South Korea

Volume

39

Issue

3

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1488

Lastpage

1491

Abstract

This paper deals with the analysis for the irreversible demagnetization characteristics of a ferrite-type permanent magnet in the line-start motor using the two-dimensional finite-element method (2-D FEM). The demagnetizing currents are calculated from the transient analysis in the combination voltage equation with mechanical dynamic equation, and peak currents are applied to the irreversible demagnetization analysis computed by 2-D FEM. The nonlinear characteristic of the magnetic core is considered as well as that of a permanent magnet on the B-H curve in the analysis of irreversible demagnetization.

Keywords

demagnetisation; ferrite devices; finite element analysis; machine theory; magnetic cores; permanent magnet motors; permanent magnets; starting; synchronous motors; transient analysis; 2D FEM; B-H curve; PM synchronous motor; combination voltage equation; demagnetizing currents; ferrite-type permanent magnet; irreversible demagnetization characteristics; line-start motor; magnetic core nonlinear characteristic; mechanical dynamic equation; peak currents; single-phase motor; transient analysis; two-dimensional finite-element method; Demagnetization; Finite element methods; Magnetic analysis; Magnetic cores; Nonlinear equations; Permanent magnet motors; Permanent magnets; Transient analysis; Two dimensional displays; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.810330

Filename

1198506