Three dimensional eddy current calculation with integral equation method for transformers

Author

Higuchi, Yoshiya ; Koizumi, Makoto ; Saito, Sadamu

Author_Institution

Power & Ind. Syst. R&D Div., Hitachi Ltd., Ibaraki, Japan

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1310

Lastpage

1313

Abstract

To calculate eddy current on multiply connected magnetic substances, the frequency domain volumetric integral method has been developed. This method requires no air space grid; therefore, it is suitable for complicatedly structured objects such as transformers. Verification tests using simple plates show good agreements with analytical solutions. Two application tests to transformers are presented. In the 1st test which examines the magnetic flux density in the clamping plate, the calculated results agree with the measured ones within 10 to 30%. In the 2nd test which compares the calculated eddy current density with the measured temperature rise on the clamping plate, their results agree for the distribution property. Te suitability of this method for eddy current evaluation in power transmission equipment is confirmed

Keywords

eddy currents; frequency-domain analysis; integral equations; magnetic flux; power transformer testing; power transmission; 3D eddy current calculation; clamping plate; distribution property; eddy current density; frequency domain volumetric integral method; integral equation method; magnetic flux density; measured results; measured temperature rise; multiply connected magnetic substances; power transmission equipment; transformers; verification tests; Clamps; Density measurement; Eddy currents; Frequency domain analysis; Integral equations; Magnetic domains; Magnetic flux; Temperature measurement; Testing; Transformers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582496

Filename

582496