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Experimental and numerical study of high frequency superconducting air-core transformer
Superconductors Science and Technology, 2021Although many researches on superconducting air-core transformers have been carried out, it is mainly on the power frequency situation. The high-frequency characteristics of superconducting air-core transformers are still unclear.
Guanjie Liu +4 more
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Numerical Analysis of Current-Limiting Cooperation of a 20 MVA Superconducting Transformer and Cable
IEEE transactions on applied superconductivity, 2019In a previous study, we developed a 66/6.9 kV–2 MVA REBa2Cu3Oy (REBCO) superconducting transformer with a current-limiting function that was cooled with subcooled liquid nitrogen at 65 K.
F. Nakamura +5 more
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Quench protection of superconducting transformers
IEEE Transactions on Magnetics, 1991Protection of superconducting transformers from the quench caused by excess fault current was studied theoretically with the aid of a simple equivalent circuit model which was composed of leakage inductance and resistances of the conductor. The authors distinguished the resistance in the flux-flow state from that in the normal state, and basic ...
M. Iwakuma +3 more
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Modeling of the Power Losses and the Efficiency of a 21 MVA Superconducting Transformer
2018 Conference on Electrotechnology: Processes, Models, Control and Computer Science (EPMCCS), 2018The study involves a computer model of a single-phase conventional as well as a superconducting transformer with the power of 21 MVA, developed in the PSpice program.
P. Surdacki +2 more
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High-Tc superconducting transformer-rectifiers: principle, realization, and applications
Superconductors Science and TechnologyHigh-Tc superconducting (HTS) flux pumps are capable of wirelessly powering HTS magnets, and are becoming promising alternatives of driven mode excitation which requires thermally inefficient current leads.
Jianzhao Geng +3 more
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Considerations about HTS superconducting transformers
IEEE Transactions on Appiled Superconductivity, 2001A superconducting transformer brings savings in weight, loss and to a lesser degree, in volume. A transformer uses a magnetic circuit in order to decrease the no-load current. The magnetic circuit can operate either at the same temperature than the superconducting windings or at room temperature.
G. Donnier-Valentin +2 more
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Superconductive chirp-transform spectrum analyzer
IEEE Electron Device Letters, 1985Spectral analysis over an instantaneous bandwidth of 2.4 GHz has been demonstrated utilizing superconductive dispersive delay lines in a chirp-transform configuration. Two-tone resolution of 43 MHz and ±1.2-dB amplitude uniformity were achieved.
R.S. Withers, S.A. Reible
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PSpice Modeling of the Inrush Current in a 10 kVA Superconducting Transformer
2018 Progress in Applied Electrical Engineering (PAEE), 2018The paper proposes a circuit model implemented in PSpice code in order to analyse the inrush current parameters of a 10 kVA superconducting HTS transformer. The results of PSpice modeling of an HTS and a conventional transformer with copper windings have
P. Surdacki +2 more
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Superconducting coaxial turn transformer
Cryogenics, 1990Abstract The concept of a superconducting coaxial turn transformer is presented. The turns enclose each other like hoses and the circularly wound warm iron core encloses the coils outside the cryostat. This concept promises some remarkable advantages over other geometries.
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Design and analysis of a high temperature superconducting thin film transformer
Superconductors Science and Technology, 2020A novel thin film transformer based on double sided YBa2Cu3O7−x (YBCO) thin films with high operating performance, named a high temperature superconducting thin film transformer (HTS-TFT), is proposed and tested. In this paper, we designed and fabricated
Le Liang +3 more
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