DEVELOPMENT OF MAGNETIC PROPERTY MEASUREMENT EQUIPMENT USING EPSTEIN FRAME : PERFORMANCE COMPARISON WITH SINGLE SHEET TESTER

DOI IR (HANDLE)

Bibliographic Information

Other Title
  • エプスタイン試験器による磁気特性測定装置の開発 : 単板磁気試験器との性能比較

Description

The Epstein frame is one of the very effective magnetic testers for measuring the magnetic properties of electromagnetic steel sheets used as the main iron core material of motors. There is no need to use yokes to measure magnetic properties with the Epstein tester. Therefore, it is possible to measure in the state of a single magnetic material. In addition, the method for measuring magnetism in the audible frequency range has been standardized by JIS. However, in Japan, single sheet tester, which are easy to automate, simple in structure, and inexpensive, are more commonly used. In this paper, we compared the measurement performance of Epstein frame with that of single sheet tester. The excitation current method was adopted as the calculation of the magnetic field in each magnetic tester. In addition, distortion of the magnetic flux density waveform occurs in the high magnetic flux density region. Therefore, in order to unify the measurement conditions, waveform control was performed so that the magnetic flux density waveform would be sinusoidal. In order to compare the performance of the magnetic measurements of the Epstein frame and single sheet tester at varying frequencies, the DC hysteresis characteristics were derived using the dual frequency method. As a result, it was confirmed that the measurement results of the Epstein frame were more consistent and less affected by the frequency change than those of the single sheet tester.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390574490535821440
  • DOI
    10.15002/00025322
  • HANDLE
    10114/00025322
  • ISSN
    24368083
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • JaLC
    • IRDB
  • Abstract License Flag
    Allowed

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