Title :
Single sheet tester having open magnetic path for measurement of magnetostriction of electrical steel sheet
Author :
Nakase, Tomoya ; Nakano, Masanori ; Fujiwara, Koji ; Takahashi, Norio
Author_Institution :
Dept. of Electr. & Electron. Eng., Okayama Univ., Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
A single sheet tester having closed magnetic path (a closed type of SST) has a problem that measurement accuracy of magnetostriction is considerably affected by electromagnetic force between specimen and yoke. Therefore, an open type has been developed. In order to get uniform flux distribution in a sufficiently large region, a compensating magnetizing winding is installed, and a method of waveform control is investigated, in which applied voltages to main and compensating windings are adjusted individually. The effectiveness of the newly developed open type is demonstrated by measuring magnetostrictions of thin amorphous sheet as well as highly grain-oriented silicon steel sheet
Keywords :
amorphous magnetic materials; ferromagnetic materials; iron alloys; magnetic flux; magnetic variables measurement; magnetostriction; silicon alloys; steel; FeSi; amorphous sheet; compensating magnetizing winding; electrical steel sheet; grain-oriented sheet; magnetostriction; open magnetic path; single sheet tester; uniform flux distribution; Amorphous magnetic materials; Amorphous materials; Electromagnetic forces; Electromagnetic measurements; Force measurement; Magnetic flux; Magnetostriction; Silicon; Testing; Voltage control;
Journal_Title :
Magnetics, IEEE Transactions on
