Hg0.8Re0.2Ba2Ca2Cu 3O8.8 thick film produced by Laser Ablation

Orlando, M. T. D.; Rodrigues, V. A.; Dias, Susana; Fardin, Jussara Farias; Simonetti, Domingos Sávio Lyrio; Belich, H.; Carvalho, Cesar Cosenza; Neto, J. L. da Silva; Yugue, E.S.; Werneck, Marcelo Martins

doi:10.1590/s2179-10742011000100012

Cited by 2 publications

(3 citation statements)

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“…The operating temperature is fixed at 102 K. The curve of the evolution of the current density written as a function of the temperature of the superconductor is shown in Figure 8. To facilitate the calculations in our model, we have taken into consideration the value of the critical current density at 77 K, i.e., Jc = 0.39 * 10 2 A/cm 2 [25]. For 77 K to 135 K temperature range, the critical current density Jc was defined using 10 µV/mm as an electrical field criterion.…”

Section: Resultsmentioning

confidence: 99%

“…Taking into account that the thickness of the blades separating the conductor-superconductor assembly is very small compared to those of the conductor and the superconductor, its impact on the torque will be neglected. The conductor is made of copper and the superconductor is made of an alloy of Mercury, Rhenium, Barium, Calcium, copper, and oxide (Hg 0.8 Re 0.2 Ba 2 Ca 2 Cu 3 O 8.8 ) [25] which its maximum critical temperature is 135 K and can operate under atmospheric pressure. The superconductor is Hi-shaped and wound on the surface of the copper core.…”

Section: Recent Findings a Proposed Modelmentioning

confidence: 99%

“…FIGURE 8. The critical current density Jc was defined using 10 µV/mm as electrical field criterion on a sample of Hg 0.8 Re 0.2 Ba 2 Ca 2 Cu 3 O 8.8[25].…”

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confidence: 99%

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Torque Characteristics Analysis of a Novel Hybrid Superconducting Magnetic Coupling With Axial-Flux Using a Magnetic Equivalent Circuit Model

et al. 2022

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A novel hybrid superconducting coupling (NHSC) is proposed in this paper, in which the secondary is composed of copper and a split superconductor. A magnetic equivalent circuit (MEC) model is presented to analyze and calculate the distribution of the magnetic field and torque characteristics. The 3D modeling considers the end effects encountered in mating. The expressions of the magnetic flux and torque are obtained by combining Kirchhoff's law and Ampere's loop law, respectively. A 3D finite element (FE) model is built, and the simulation is performed. Its performance is investigated using a 135K critical hightemperature superconductor to have a greater operating margin of the coupling. For a high slip speed of 1500 rpm, we observed a peak torque of 167 Nm and stability of 115 Nm. By varying the thickness of the air gap or the PMs, we observed the increasing or decreasing of the torque. Due to the cryogenics systems, we also observed the reduction of the losses by the joule effect. The maximum error between the results of the torque obtained by simulation and the results calculated using the proposed model is 6.74%, which proves that both results are in good agreement.INDEX TERMS Hybrid superconducting magnetic coupling, magnetic equivalent circuit (MEC), split superconductor disk, torque.

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Section: Resultsmentioning

confidence: 99%

Section: Recent Findings a Proposed Modelmentioning

confidence: 99%