Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2200236
