Journal ArticleDOI
Effective resistance of current-carrying superconducting wire in oscillating magnetic fields 1: Single core composite conductor
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In this paper, the influence of oscillating magnetic fields on the dc transport current in a single core superconducting wire has been studied by observing the terminal voltage of the wire.About:
This article is published in Cryogenics.The article was published on 1976-01-01. It has received 91 citations till now. The article focuses on the topics: Superconducting wire & Superconducting magnetic energy storage.read more
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Computation of Losses in HTS Under the Action of Varying Magnetic Fields and Currents
TL;DR: This paper presents a literature review of the methods for computing ac losses in HTS tapes, wires, and devices and provides an estimation of the losses occurring in a variety of power applications.
Journal ArticleDOI
Dynamic resistance of a high-Tc superconducting flux pump
TL;DR: In this article, a mechanically rotating superconducting flux pump was used to excite an HTS double pancake coil at 77 K. This flux pump is found to possess an effective internal resistance, Reff, which varies linearly with frequency, and is two orders of magnitude larger than the measured series resistance of the soldered contacts within the circuit.
Journal ArticleDOI
Dynamic resistance in a slab-like superconductor with Jc(B) dependence
TL;DR: In this article, the dynamic resistance in a slab-like superconductor is calculated, taking into account a field-dependent critical current density, and the model predicts the observed dependence of dynamic resistance on field amplitude, field frequency and transport current.
Journal ArticleDOI
Mechanism of a high-Tc superconducting flux pump: Using alternating magnetic field to trigger flux flow
Jianzhao Geng,Tim Coombs +1 more
TL;DR: In this article, the authors proposed a flux pumping mechanism for high-tc superconducting (HTS) coils with an experimental verification and an analytical model, where the basic principle is that flux flow can be triggered when the superconductor carrying a direct current is subjected to a perpendicular AC magnetic field.
Journal ArticleDOI
Development of a brushless HTS exciter for a 10 kW HTS synchronous generator
Chris W. Bumby,Rodney A. Badcock,Hae-Jin Sung,Kwangmin Kim,Zhenan Jiang,A. E. Pantoja,Patrick Bernardo,Patrick Bernardo,Minwon Park,R. G. Buckley +9 more
TL;DR: In this article, a brushless HTS-PM exciter is proposed to inject a superconducting DC current into the rotor coil circuit, which can significantly alter the thermal load upon the cryogenic system by removing the need for thermally inefficient normalconducting current leads.
References
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Superconducting coil degradation
TL;DR: In this article, the degradation phenomenon of superconducting coils was investigated and it was established that flux jumps occurring in a low field zone cause a sudden decrease in the series current, which in turn causes a disturbance of field throughout the coil and thus probably results in a quench in a high field zone.
Journal ArticleDOI
Electrical resistance and magnetization of type-II superconductors
TL;DR: In this paper, the voltage U across a type II superconductor under constant transport current and linear field sweep conditions was shown to be proportional to B d B /d t, and the relation of U to the magnetization and the a.c. losss was pointed out.
Journal ArticleDOI
Apparent resistance of non-ideal type ii superconductors.
TL;DR: In this article, the emergence of apparent resistance is discussed for different cases of inductive as well as of non-inductive coils wound with non-ideal type II superconductors and placed into an external magnetic field oscillating with some low frequency.
Related Papers (5)
Mechanism of a high-Tc superconducting flux pump: Using alternating magnetic field to trigger flux flow
Jianzhao Geng,Tim Coombs +1 more