DocumentCode :
1061687
Title :
Factors affecting errors due to 2-D approximate analysis of 3-D magnetic fields with eddy currents [rotating machines]
Author :
Takahashi, N. ; Nakata, T. ; Fujiwara, K. ; Nishimura, T.
Author_Institution :
Dept. of Electr. Eng., Okayama Univ., Japan
Volume :
27
Issue :
6
fYear :
1991
fDate :
11/1/1991 12:00:00 AM
Firstpage :
5223
Lastpage :
5225
Abstract :
The effects of the leakage flux, eddy current path, and end coil of electric machines on the flux and eddy current density analyzed by the 2-D approximation are investigated systematically by making a comparison with 3-D analysis. It is shown that, when the gap length is relatively large, the difference between the fluxes calculated by 2-D and 3-D analyses is pronounced due to the leakage flux. The flux in the pole obtained by 3-D analysis is larger than that obtained by 2-D analysis under constant current excitation, and the flux obtained by 3-D analysis is less than that obtained by 2-D analysis under constant voltage excitation. When the eddy current flows in the thin core, a larger error occurs in the 2-D analysis, because there is a great difference in eddy current paths between 2-D and 3-D models
Keywords :
eddy currents; electric machine analysis computing; error analysis; finite element analysis; induction motors; magnetic fields; 2D approximate analysis; 3D magnetic fields; FEM; eddy current path; eddy currents; electric machines; end coil; errors; induction motors; leakage flux; rotating machines; Boundary conditions; Coils; Eddy currents; Error analysis; Magnetic analysis; Magnetic circuits; Magnetic cores; Magnetic fields; Magnetic flux; Shape;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.278794
Filename :
278794
Link To Document :
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