Finite element calculation of harmonic losses in AC machine windings

Author

Salon, S.J. ; Ovacik, L. ; Balley, J.F.

Author_Institution

Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA

Volume

29

Issue

2

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1442

Lastpage

1445

Abstract

The finite-element method (FEM) with circuit constraints is used to study the problem of harmonic losses in stranded conductors typically found in AC machines. A discussion of the method is given along with examples using actual motor windings. The results of the finite element calculations are compared to a closed-form solution which ignores the effects of eddy currents on the field (resistance limited case) and which is commonly used in machine design to find the eddy factor. The agreement is good at low frequency but begins to diverge after the first few harmonics

Keywords

AC machines; eddy current losses; electric machine analysis computing; finite element analysis; frequency response; frequency-domain analysis; machine windings; power system harmonics; AC machine windings; circuit constraints; closed-form solution; eddy factor; finite-element method; frequency domain analysis; harmonic losses; induction machine; resistance limited case; stranded conductors; AC machines; Circuits; Conductors; Current density; Eddy currents; Finite element methods; Frequency; Induction motors; Machine windings; Variable speed drives;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.250674

Filename

250674