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Design issues of Rotational Single Sheet Tester for Fe-Based Nanocrystalline Alloys at High Frequencies

Journal of Magnetics, Volume 26, Number 2, 30 Jun 2021, Pages 205-215
Long Chen (China Three Gorges University), Han Xiong (China Three Gorges University), Tong Ben * (China Three Gorges University), Shifeng Li (China Three Gorges University)
Abstract
Measuring the vector magnetic properties of nanocrystalline soft magnetic materials at high frequencies is of
great significance to the optimal design and energy saving of the electrical equipment. In this paper, some key
design issues are discussed for a rotational single sheet tester (RSST) to further studied the Two-Dimensional
(2D) magnetic properties of nanocrystalline alloys in the kilohertz range. Firstly, the magnetization uniformity
of the testing sample is analyzed and discussed considering the stray field. Secondly, the magnetizer's geometric
dimensions are optimized to achieve higher magnetic flux density levels with the minimum energy consummation.
Thirdly, the magnetic field and the magnetic flux density sensing system are optimally designed to
measure the nanocrystalline alloys' magnetic properties at high frequencies. Finally, a robust controlling algorithm
is developed to control the magnetic flux density waveform to sinusoidal in the x and the y-direction.
Obtained results show that the proposed structure can measure the vector magnetic properties of nanocrystalline
alloys up to 10 kHz.
Keywords: Finite element analysis (FEM); nanocrystalline alloys; vector magnetic properties; optimization
DOI: https://doi.org/10.4283/JMAG.2021.26.2.205
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