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Calculation of AC Magnetizing Loss of ReBCO Superconducting Tapes Subjected to Applied Distorted Magnetic Fields

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Abstract

In recent years, there are fast-increasing concerns on the utilizations of superconducting rotating electrical machines in different application areas, such as ship propulsion systems, aircraft drivers, and wind turbine generators, since these machines exhibit the merits of high current density, compact design, high power density, light weight, high torque density as well as high efficiency. One of the main limitations in front of the vast use of superconducting tapes in the fabrication of electrical machineries is AC magnetizing loss when tapes are exposed to an external magnetic field, which can decrease the critical current density of wires, as well. In the literature, most of the research works have been done on calculation of the AC magnetizing loss under a pure external magnetic field, while in reality, magnetic flux lines in AC electrical machines are usually distorted with harmonics because of different reasons such as distorted leakage flux, distributed coils of a winding in several slots, cogging fields, mechanical faults, etc. Since these distorted fields contain harmonics, then in this paper, the AC magnetizing loss of superconducting tapes has been electromagnetically modeled and calculated when they are subjected to nonsinusoidally distorted external magnetic fields. The magnetic field dependency of critical current density has been considered in a proposed finite element model. The results have shown that the AC magnetizing loss increases significantly under a distorted applied field compared with a sinusoidal one. In addition, the loss increase depends on the harmonic content which would increases drastically with total harmonic distortion of the applied magnetic field.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran

    Mohammad Yazdani-Asrami, S. Asghar Gholamian, Seyyed Mehdi Mirimani & Jafar Adabi

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  1. Mohammad Yazdani-Asrami
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  2. S. Asghar Gholamian
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  3. Seyyed Mehdi Mirimani
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  4. Jafar Adabi
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Correspondence to S. Asghar Gholamian.

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Yazdani-Asrami, M., Gholamian, S.A., Mirimani, S.M. et al. Calculation of AC Magnetizing Loss of ReBCO Superconducting Tapes Subjected to Applied Distorted Magnetic Fields. J Supercond Nov Magn 31, 3875–3888 (2018). https://doi.org/10.1007/s10948-018-4695-7

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  • DOI: https://doi.org/10.1007/s10948-018-4695-7

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