Dynamic Jiles–Atherton Model for Determining the Magnetic Power Loss at High Frequency in Permanent Magnet Machines

Author

Ruoyang Du ; Robertson, Paul

Author_Institution

Electr. Eng. Div., Univ. of Cambridge, Cambridge, UK

Volume

51

Issue

6

fYear

2015

fDate

42156

Firstpage

1

Lastpage

10

Abstract

This paper describes a mathematical model for the dynamic magnetic power losses in the laminated steel stator of high-frequency permanent magnet machines, such as brushless dc (BLDC) motors. The model presented is based on a utilization of the dynamic Jiles-Atherton model. Accurate dynamic B-H curve fitting and magnetic power loss derivations have been achieved, where the calculated magnetic losses have shown ~95% accuracy from 5 to 2000 Hz over a flux density range of 1.0-1.6 T. This approach has been applied to estimate the magnetic power loss of a small scale high-frequency (>10 000 r/min) BLDC motor, with calculated and measured losses being in close agreement.

Keywords

brushless DC motors; eddy current losses; laminates; magnetic leakage; permanent magnet machines; steel; BLDC motor; brushless dc motors; dynamic B-H curve fitting; dynamic Jiles-Atherton model; dynamic magnetic power losses; frequency 5 Hz to 2000 Hz; high-frequency permanent magnet machines; laminated steel stator; magnetic flux density 1 T to 1.6 T; Lamination; Magnetic domain walls; Magnetic domains; Magnetic flux; Magnetic hysteresis; Magnetic losses; Mathematical model; Finite element methods (FEM); Finite-element methods (FEMs); Magnetic hysteresis; Magnetic losses; Magnetization; Permanent magnet generators; Permanent magnet machines; Permanent magnet motors; magnetic hysteresis; magnetic losses; magnetization; permanent magnet generators; permanent magnet machines; permanent magnet motors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2382594

Filename

6990633