1. Phase Correction for High Precision Measurement of Iron Loss Using H-coil Method.
- Author
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Kutsukake, Akifumi, Kido, Yukihito, Ikeda, Tetsu, Kanada, Tsugunori, and Enokizono, Masato
- Subjects
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ELECTRICAL steel , *MAGNETIC flux density , *ELECTROMAGNETIC devices , *ELECTRIC coils , *ELECTRIC potential ,MAGNETIC properties of steel - Abstract
SUMMARY The accurate magnetic properties of electrical steel sheets are important for the development of high-efficiency electromagnetic devices. In particular, the H-coil method is a useful technique for accurately measuring magnetic field strength in a single sheet tester. Therefore, we developed a tester for magnetic field properties using the H-coil method, referred to as the stress load type single sheet tester (S-SST), and a problem was found in iron loss measurement at a high flux density of 1.6 T or more. In this paper, it is shown that the cause of this problem is the phase difference between the induced voltage in the H-coil and the B-coil. Because the phase difference makes the B-H loop slightly twisted near the tip point, the iron losses are evaluated low. Thus, we propose a method of determining the phase correction values. These values are measured in the absence of a specimen in the S-SST measurement system, and the phase correction method for induced voltage in a coil is investigated. Finally, ideal results for the correction of iron loss in nonoriented electrical steel sheets are shown. The proposed method is effective for the calibration of a single sheet tester using the H-coil method. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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