Effects of eddy currents in the specimen in a single sheet tester on measurement errors

Author

Nakata, T. ; Takahashi, N. ; Fujiwara, K. ; Nakano, H. ; Kayada, T.

Author_Institution

Dept. of Electr. Eng., Okayama Univ., Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1641

Lastpage

1643

Abstract

The most favorable construction of the yoke of a single-sheet tester (SST) has been studied by measurements and numerical analysis. It is shown that the eddy currents in a specimen affect the measurement error of the SST, and the error increases with increase in the overhang length and with decrease in the distance between yokes. It is concluded that the single-yoke-type tester has a large error due to eddy currents and that the double-yoke tester is superior. If a single-yoke-type SST is used, the lengths of the B and H coils should be chosen in such a way that the measured power loss is not affected by the eddy currents in the specimen

Keywords

eddy currents; magnetic variables measurement; measurement errors; double-yoke tester; eddy currents; measurement error; overhang length; single-sheet tester; single-yoke-type tester; specimen; yoke; Coils; Current measurement; Density measurement; Eddy current testing; Eddy currents; Loss measurement; Measurement errors; Power measurement; Silicon; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104474

Filename

104474