Calculation and measurement of time characteristics of local field quantities in the air-gap of claw-pole alternators

Author

Ramesohl, I. ; Henneberger, G.

Author_Institution

Inst. of Electr. Machines, Tech. Hochschule Aachen, Germany

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

4200

Lastpage

4202

Abstract

This paper deals with the calculation and measurement of local magnetic field quantities in the air-gap of claw-pole alternators. The numerical procedures are based on 3-D finite element methods (FEM). It is important to investigate the local field and force-density distribution on the surface of the stator in order to use these results for dynamic mechanical displacement calculations. This is the basis for acoustic prediction of the audible noise. The calculation method is presented for global values, like induced voltages, and for local time characteristics, like force-densities and flux-densities. The inductions on the stator surface are measured using thin Hall effect devices at different stator tooth positions. All presented results are compared with measurements on a simplified test-alternator and show good agreement

Keywords

alternators; finite element analysis; machine testing; machine theory; magnetic field measurement; magnetic fields; magnetic flux; stators; 3-D finite element methods; FEM; air-gap; audible noise prediction; claw-pole alternators; dynamic mechanical displacement calculations; flux-densities; force-densities; force-density distribution; global values; induced voltages; local magnetic fields; local time characteristics; stator surface; stator tooth position; thin Hall effect devices; Acoustic devices; Acoustic measurements; Acoustic noise; Air gaps; Alternators; Finite element methods; Magnetic field measurement; Stators; Time measurement; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619709

Filename

619709