Simulations and experiments on eddy current in Nd-Fe-B magnet

被引：46

作者：

Aoyama, Y ^{[1
]}

Miyata, K ^{[1
]}

Ohashi, K ^{[1
]}

机构：

[1] Shin Etsu Chem Co Ltd, Magnet Mat Res Ctr, Fukui, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2005年 / 41卷 / 10期

关键词：

eddy current; harmonic analysis; loss measurement; magnet; magnetic analysis;

D O I：

10.1109/TMAG.2005.854698

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Eddy current loss in Nd-Fe-B sintered magnets was investigated from experimental and simulated aspects. Eddy current loss was estimated from the temperature rise rate of a thermally insulated magnet when an ac field is applied to the solenoid coil. Eddy current simulation is done by the integral element method (IEM) and finite element method (FEM). Both simulation results are compared and the accuracy of simulation is verified. IEM is mainly used for loss analysis. Both simulation results also agree well with the experimental ones. In order to reduce the eddy current loss, the effect of dividing a magnet into several segments was revealed. In an actual motor, the ac magnetic field contains higher harmonic elements. So, in order to consider higher harmonics effect on eddy current loss in Nd-Fe-B magnet in an eddy current problem, a simple addition of individual harmonic and mixing wave is investigated and compared.

引用

页码：3790 / 3792

页数：3