Maximum trapped field of a ring bulk superconductor by low pulsed field magnetization

Tsuchimoto, M.; Kamijo, H.

doi:10.1016/j.physc.2007.04.311

Cited by 11 publications

(8 citation statements)

References 3 publications

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“…To reach this value, one should apply the external field equal or exceeding 2B m [4,5]. At PFM of annuli, taking into account the demagnetization and the magnetic field diffusion, the higher amplitude of the field is required.…”

Section: Resultsmentioning

confidence: 99%

“…In case of slow isothermal magnetization of the thick-walled cylinder with internal diameter 2а 0 and external diameter 2а 1 , the highest trapped field according to Bean model is B m = µ 0 J C (а 1 -а 0 ). To reach this value, one should apply the external field equal or exceeding 2B m [4,5]. At PFM of annuli, taking into account the demagnetization and the magnetic field diffusion, the higher amplitude of the field is required.…”

Section: Resultsmentioning

confidence: 99%

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Flux Jumps at Pulsed Field Magnetization

Korotkov

Krasnoperov

Kartamyshev

2016

J Supercond Nov Magn

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Flux Jumps at Pulsed Field Magnetization

Korotkov

Krasnoperov

Kartamyshev

2016

J Supercond Nov Magn

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“…In addition, J c ∝( 1- ( T / T c ) 2 ) α for Bi-2212 tapes was mentioned in the book [10]. For 2G HTS YBCO bulks, Braeck [11] assumed a linear temperature dependence of the critical current as J c ∝(( T c - T )/( T c - T 0 )); and then Tsuchimoto [12] presented an exact nonlinear relationship of J c ∝(1-( T / T c ) 2 ) 2 .…”

Section: Introductionmentioning

confidence: 99%

Modeling of High-Tc Superconducting Bulk using Different Jc–T Relationships over Dynamic Permanent Magnet Guideway

Zheng

Liao

2019

Materials

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The linear temperature dependence of critical current density Jc∝((Tc-T)/(Tc-T0)) and the nonlinear functions of Jc∝(1-(T/Tc)2)α with the exponent α equal to 1, 3/2, and 2 are used to calculate the dynamic levitation force, the temperature distribution, and the current density distribution of the high-temperature superconducting (HTS) YBaCuO bulk over a permanent magnetic guideway (PMG). The calculations were based on the H-formulation and E–J power law. The model of the HTS bulk and the PMG has been built as a geometric entity by finite element software. To simulate the magnetic field fluctuation caused by the PMG arrangement irregularity, a small amplitude vibration in the vertical direction is applied to the PMG during the calculations. Both the low vibration frequency of 2 Hz and the high vibration frequency of 60 Hz are analyzed as the representative converted linear speeds of 34 km/h and 1018 km/h for magnetic levitation (Maglev) application. We compared the electromagnetic-thermo-force modeling with the experiments and the previous model without considering the thermal effect. The levitation force computed by the Jc–T relationship, in which Jc is proportional to (1-(T/Tc)2)2, is found to be in best agreement with the experimental data under quasi-static conditions. This work can provide a reference for the HTS electromagnetic-thermal-force coupling reproduction method of HTS Maglev at high speed.

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“…Since the evaluation of the shielding current density is often required for the design of engineering applications, several numerical methods [1][2][3] have been so far proposed to calculate the shielding current density.…”

Section: Introductionmentioning

confidence: 99%

Numerical Method for Analyzing Shielding Current Density in HTS Film with Multiple-Layer/Multiply-Connected Structure

Kamitani

Takayama

Ikuno

et al. 2013

Plasma and Fusion Research

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The governing equations of the shielding current density j in a high-temperature superconducting film are formulated for the case where the film contains cracks or holes. Since the derived equations cannot be solved only with the boundary condition j · n = 0 on the film surface, additional conditions are also derived. A numerical method is proposed for solving the initial-boundary-value problem of the equations and its performance is evaluated by means of the numerical simulation of the permanent magnet method.

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Maximum trapped field of a ring bulk superconductor by low pulsed field magnetization

Cited by 11 publications

References 3 publications

Flux Jumps at Pulsed Field Magnetization

Flux Jumps at Pulsed Field Magnetization

Modeling of High-Tc Superconducting Bulk using Different Jc–T Relationships over Dynamic Permanent Magnet Guideway

Numerical Method for Analyzing Shielding Current Density in HTS Film with Multiple-Layer/Multiply-Connected Structure

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