An empirical correlation for E(J, T ) of a melt-cast-processed BSCCO-2212 superconductor under self field

Cha, Y.S.

doi:10.1109/tasc.2003.812976

Cited by 16 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Difficulties for solving this equation by analytical methods have been reported in Refs. ( [3,4]) that basically suggest to apply ad hoc approximations when justified by the set of experimental data under consideration. On the other hand, we stress that, in fact, the limiting Bean's approximation means to avoid such equation under the following thoughts.…”

Section: Hard Superconductorsmentioning

confidence: 99%

Electromagnetics close beyond the critical state: thermodynamic prospect

Badía-Majós

López

2012

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Abstract. A theory for the electromagnetic response of type-II superconductors close beyond the critical state is presented. Our formulation relies on general physical principles applied to the superconductor as a thermodynamic system. Equilibrium critical states, externally driven steady solutions, and transient relaxation are altogether described in terms of free energy and entropy production. This approach allows a consistent macroscopic statement that incorporates the intricate vortex dynamic effects, revealed in non-idealized experimental configurations. Magnetically anisotropic critical currents and flux stirring resistivities are straightforwardly included in three dimensional scenarios.Starting from a variational form of our postulate, a numerical implementation for practical configurations is shown. In particular, several results are provided for the infinite strip geometry: voltage generation in multicomponent experiments, and magnetic relaxation towards the critical state under applied field and transport current. Explicitly, we show that for a given set of external conditions, the well established critical states may be utterly obtained as diffusive final profiles.

show abstract

Section: Hard Superconductorsmentioning

confidence: 99%

Electromagnetics close beyond the critical state: thermodynamic prospect

Badía-Majós

López

2012

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…This is a dissipative process and leads to an increase in the superconductor temperature. In the first stage ("flux-creep"), the n value is U 0 /k b T sp at 77 K [7]; for the second stage, referring to the "flux-flow," n = 4; and in the last stage, referring to the normal state, n = 1 [2].…”

Section: B Simulationsmentioning

confidence: 99%

Simulations and Tests of MCP-BSCCO-2212 Superconducting Fault Current Limiters

Sousa

Polasek

Silva

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Superconducting fault current limiters (SCFCLs) represent a promising solution to the problem of increasing shortcircuit currents in the grid. The SCFCL is based on the fast transition from the superconducting state to the normal state, causing a sudden increase in the impedance of the network. In this paper, we simulate the behavior of resistive-type SCFCL modules. The SCFCL modules are based on MCP-BSCCO 2212 coils. The superconductor acts as a nonlinear resistance that varies with the current and the temperature. The behavior of the simulated curves is consistent with the experimental results. Short-circuit currents as high as 37 kA peak were limited to about 10% of their peak values in the first half cycle.

show abstract

“…Hence, the dependence of the material characteristic on it was not considered. The empirical correlation proposed by Cha [7] was assumed for the SC material: (5) where is expressed in . The coefficient and the nondimensional exponent are defined as follows:…”

Section: Sfcl Prototype and Equivalent Circuitmentioning

confidence: 99%

Temperature Dependent Equivalent Circuit of a Magnetic-Shield Type SFCL

Fabbri

Morandi

Negrini

et al. 2005

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

In order to investigate the reciprocal interaction between a SFCL and the Power System an equivalent circuit of the device needs to be introduced in a power system simulator. In this paper the equivalent circuit of a magnetic shield type SFCL, consisting of two coupled electric and thermal networks, is obtained starting from the integral formulation of the coupled electromagnetic-thermal problem inside the device. The numeric waveforms of current and voltage across an SFCL during a fault are calculated and compared with the experimental ones.

show abstract

An empirical correlation for E(J, T ) of a melt-cast-processed BSCCO-2212 superconductor under self field

Cited by 16 publications

References 11 publications

Electromagnetics close beyond the critical state: thermodynamic prospect

Electromagnetics close beyond the critical state: thermodynamic prospect

Simulations and Tests of MCP-BSCCO-2212 Superconducting Fault Current Limiters

Temperature Dependent Equivalent Circuit of a Magnetic-Shield Type SFCL

Contact Info

Product

Resources

About