Estimation of stray losses of skewed rotor induction motors using coupled 2-D and 3-D time stepping finite element methods

Author

Ho, S.L. ; Fu, W.N. ; Wong, H.C.

Author_Institution

Dept. of Electr. Eng., Hong Kong Univ., Hong Kong

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

3102

Lastpage

3105

Abstract

A precise estimation of stray losses in skewed rotor induction motors is an important and yet very challenging topic for machine designers. Methods for evaluating the stray losses in skewed rotor induction motors by coupling a 2-D multi-slice time stepping finite element model into a 3-D time stepping finite element method are presented in this paper. The model can take into account the inter-bar currents which are ignored if a 2-D finite element model only is used. New formulae, which are based on the actual changes in the magnetic flux densities and can be easily coupled into a time stepping finite element method for estimating the iron losses, are also described

Keywords

finite element analysis; induction motors; losses; machine theory; magnetic flux; rotors; inter-bar currents; iron losses; machine design; magnetic flux densities; skewed rotor induction motors; stray losses estimation; time stepping finite element methods; Bars; Conducting materials; Couplings; Finite element methods; Induction motors; Iron; Magnetic fields; Magnetic materials; Maxwell equations; Rotors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717726

Filename

717726