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


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Authors

Ruoyang Du 
Robertson, Paul 

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 BH curve fitting and magnetic power loss derivations have been achieved, where the calculated magnetic losses have shown around 95% accuracy from 5 Hz to 2000 Hz, over a flux density range of 1.0 T to 1.6 T. This approach has been applied to estimate the magnetic power loss of a small scale, high frequency (>10,000 rpm) BLDC motor, with calculated and measured losses being in close agreement.

Description

Keywords

Finite element methods (FEM), Magnetic hysteresis, Magnetic losses, Magnetization, Permanent magnet generators, Permanent magnet machines, Permanent magnet motors

Journal Title

IEEE Transactions on Magnetics

Conference Name

Journal ISSN

0018-9464
1941-0069

Volume Title

51

Publisher

Institute of Electrical and Electronics Engineers (IEEE)