Large-scale HTS bulks for magnetic application

Werfel, F.; Floegel-Delor, U.; Riedel, Thomas; Goebel, Bernd; Rothfeld, R.; Schirrmeister, P.; Wippich, D.

doi:10.1016/j.physc.2012.03.007

Cited by 71 publications

(39 citation statements)

References 5 publications

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“…The geometrical sizes of the YBaCuO bulks are 64, 32, and 12 mm in length, width, and height, respectively [14]. Considering the different magnetic flux density distributions of PMGs, two kinds of PMG named PMG-A (one peak value of the magnetic flux density at the center area) and PMG-B (two peak values of the magnetic flux density at the center area, typically of Halbach-type configuration) were employed to generate the working magnetic field for the bulk superconductors, and their cross sections are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Levitation Performance of Rectangular Bulk Superconductor Arrays Above Applied Permanent-Magnet Guideways

Deng

Zheng

2015

IEEE Trans. Appl. Supercond.

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Bulk high-temperature superconductors with a rectangular shape are easy to realize a compact assembly, which is promising for maglev applications. In order to find a reasonable array pattern, we have studied the levitation force of four multiseeded rectangular YBaCuO blocks with three possible arrays above two different permanent-magnet guideways (PMGs). Experimental results show that the levitation force can be improved by optimizing the array pattern of the bulk superconductors. An effective method to improve the utilization rate of the applied magnetic field is to avoid the joint air gaps between bulks located in a strong magnetic field area of the PMG. The optimal array pattern is able to enhance the levitation performance of the present superconducting maglev vehicle.

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Section: Methodsmentioning

confidence: 99%

Levitation Performance of Rectangular Bulk Superconductor Arrays Above Applied Permanent-Magnet Guideways

Deng

Zheng

2015

IEEE Trans. Appl. Supercond.

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“…1(c). There are four cryostats in vehicle which were fixed on the four corners of the bogies, and each cryostat contains 24 rectangular three-seeded melt-textured YBaCuO bulks with a dimension of 64×32×13 mm 3 fabricated by ATZ GmbH, Germany [11] . Two bogies in the HTS maglev system are respectively on the front and latter part of the vehicle, on which the linear motor induction plate and the seat is installed.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study of Aerodynamic Characteristics of High Temperature Superconducting Maglev-Evacuated Tube Transport System

Bao¹,

Wang²,

Zhang³

et al. 2017

dtetr

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In the high temperature superconducting maglev-evacuated tube transport (HTS Maglev-ETT) system, the air drag is the most principal resistance to the speed improvement and energy conservation. Considering the aerodynamic performance of the HTS Maglev-ETT system has great significance in practical application. As the first step, we experimentally explored the influence of velocity, blockage ratio and airshaft on the air drag of a running maglev vehicle at atmospheric pressure (95.6 kPa in Chengdu), coupled with the simulation by using the ANSYS-FLUENT software. The results preliminarily confirmed the feasibility of the aerodynamic experiments on the HTS maglev-ETT test system, as the drag is proportional to the blockage ratio and the square of velocity respectively. Moreover, airshafts are suggested to be added in the future design of the HTS Maglev-ETT system, aimed at its good relief on the air drag displayed in the experiment and simulation.

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“…Potential applications of bulk HTS include high-magnetic-field permanent magnets, magnetic bearings, magnetic separators and levitated transportation systems [2][3][4][5]. Over the past thirty years, therefore, there has been a concerted effort world-wide to develop these materials for practical applications [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A novel pre-sintering technique for the growth of Y–Ba–Cu–O superconducting single grains from raw metal oxides

Shi

Dennis

et al. 2017

Supercond. Sci. Technol.

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Most established top seeded melt growth (TSMG) processes of bulk, single grain Y-Ba-Cu-O (YBCO) superconductors are performed using a mixture of pre-reacted precursor powders. Here we report the successful growth of large, single grain YBCO samples by TSMG with good superconducting properties from a simple precursor composition consisting of a sintered mixture of the raw oxides. The elimination of the requirement to synthesize precursor powders in a separate process prior to melt processing has the potential to reduce significantly the cost of bulk superconductors, which is essential for their commercial exploitation. The growth morphology, microstructure, trapped magnetic field and critical current density, J c , at different positions within the sample and maximum levitation force of the YBCO single grains fabricated by this process are reported. Measurements of the superconducting properties show that the trapped filed can reach 0.45 T and that a zero field J c of 2.5 × 10 4 A cm −2 can be achieved in these samples. These values are comparable to those observed in samples fabricated using pre-reacted, high purity commercial oxide precursor powders. The experimental results are discussed and the possibility of further improving the melt process using raw oxides is outlined.

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Large-scale HTS bulks for magnetic application

Cited by 71 publications

References 5 publications

Levitation Performance of Rectangular Bulk Superconductor Arrays Above Applied Permanent-Magnet Guideways

Levitation Performance of Rectangular Bulk Superconductor Arrays Above Applied Permanent-Magnet Guideways

Preliminary Study of Aerodynamic Characteristics of High Temperature Superconducting Maglev-Evacuated Tube Transport System

A novel pre-sintering technique for the growth of Y–Ba–Cu–O superconducting single grains from raw metal oxides

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