Consideration of Eddy Current Loss Estimation in SPM Motor Based on Electric and Magnetic Networks

Author

Yoshida, Yukihiro ; Nakamura, Kenji ; Ichinokura, Osamu

Author_Institution

Grad. Sch. of Eng., Tohoku Univ., Sendai, Japan

Volume

48

Issue

11

fYear

2012

Firstpage

3108

Lastpage

3111

Abstract

This paper presents a method for calculating eddy current loss in permanent magnets of a surface permanent magnet (SPM) motor based on electric and magnetic networks. First, an electric network model to calculate the eddy current loss is indicated. Then, to find the resistivity of a Nd-Fe-B magnet, eddy current loss in the magnet is measured by using a test core. Next, a reluctance network analysis (RNA) model of the SPM motor considering the rotor rotation is presented. The eddy current losses in the magnet of the SPM motor from no load to full load conditions are calculated by the RNA model and electric network model. The eddy current losses calculated by the proposed model agree well with the ones obtained from three-dimensional finite-element analysis.

Keywords

boron alloys; eddy current losses; finite element analysis; iron alloys; neodymium alloys; permanent magnet motors; reluctance motors; rotors; Nd-Fe-B magnet; NdFeB; SPM motor; eddy current loss estimation; electric networks; magnetic networks; reluctance network analysis; rotor rotation; surface permanent magnet motor; test core; three-dimensional finite-element analysis; Eddy currents; Load modeling; Magnetic cores; Magnetic losses; Permanent magnet motors; RNA; Reluctance motors; Eddy-current loss; reluctance network analysis (RNA); surface permanent magnet (SPM) motor;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2200236

Filename

6332622