Journal
MATERIALS
Volume 16, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/ma16020633
Keywords
high-temperature superconductors; HTS bulks; rotating magnetic fields; AC loss
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High-temperature superconductor (HTS) bulks have shown great potential for industrial and commercial applications due to their ability to trap larger magnetic fields compared to conventional permanent magnets. Previous research on the electromagnetic properties of HTS focused solely on the AC magnetic fields and the associated AC loss. This paper provides a comprehensive examination of the AC loss measurement under various conditions, comparing the results to the finite element-based H-formulation. The findings offer insights into material characterization that will be valuable for the design of future large-scale HTS applications.
High-temperature superconductor (HTS) bulks have demonstrated extremely intriguing potential for industrial and commercial applications due to their capability to trap significantly larger magnetic fields than conventional permanent magnets. The magnetic field in electrical rotating machines is a combination of alternating and rotational fields. In contrast, all previous research on the characterization of electromagnetic properties of HTS have solely engrossed on the alternating AC magnetic fields and the associated AC loss. This research paper gives a thorough examination of the AC loss measurement under various conditions. The obtained results are compared to the finite element-based H-formulation. The AC loss is measured at various amplitudes of circular flux density patterns and compared with the AC loss under one-dimensional alternating flux density. The loss variation has also been studied at other frequencies. The findings in this research paper provide more insights into material characterization, which will be useful in the design of future large-scale HTS applications.
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