Abstract
Transport loss is an integral part of high-temperature superconductor (HTS)-coated conductors (CC)’s loss. In the field of high-speed motor, the frequency of the current carried by HTS CCs used as windings can be up to 1MHz. The dependence of transport loss of HTS CCs on current parameters below 1MHz has been investigated based on the \(\mathbf {H}\)-formulation model in this paper. It is shown that the transport loss of CCs mainly depends on the loss in HTS components and copper components. There exists a transition frequency, below which the loss in the inner HTS layer accounts for the most significant proportion of total transport loss. Above the transition frequency, the transport loss in the outer copper stabilizer becomes the main component. The current amplitude only affects the magnitude of transport loss but does not affect its change rule. Furthermore, the dependence of transport loss on the current waveform is investigated based on typical winding current waveforms. It is also found that there is a transition frequency. The low-order harmonics of current have a greater impact on the transport loss in the HTS layer below the transition frequency. The obtained results of this paper can provide a reference for the research of high-speed superconducting motor and other superconducting equipment in high-frequency current conditions.
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Zhang, Y., Su, T., Guo, Q. et al. Dependence of AC Transport Loss of HTS-Coated Conductor on Current Parameters in the Frequency Range under 1MHz. J Supercond Nov Magn 34, 2271–2280 (2021). https://doi.org/10.1007/s10948-021-05946-3
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DOI: https://doi.org/10.1007/s10948-021-05946-3