Implementation of a Non-Contact X-Y Mover With High Temperature Superconductors

Chen, In‐Gann; Wang, Chun-Chih; Hsio, Yuan-Shan; Lai, Wen-Chien; Chen, Hang-Sheng; Tsai, Ming-Han; Tsai, Meng-Hung; Cheng, Ming-Yang

doi:10.1109/tasc.2007.899265

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…The reports show that by effective pinning of flux lines, the vortex movements can be prevented and thereby increases the critical current density. Therefore, it is of current interest to prepare samples with appropriate artificial pinning centers to increase the critical current density and flux-pinning force (F p ) [6][7][8][9][10]. The doping of impurities with size of the order of the coherence length (j) or creation of nanosize defects in the system by adjusting the processing condition can create effective pinning centers.…”

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confidence: 99%

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

Rejith¹,

Vidya²,

Vipinlal³

et al. 2013

Phys. Status Solidi B

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The effect of addition of different weight percentages of nanocrystalline HfO2, synthesized through a modified combustion method in bulk coarse‐grained orthorhombic YBa2Cu3O7−δ powder was studied. The structure and microstructure of the samples examined by X‐ray diffraction (XRD) and scanning electron microscopy (SEM) showed the formation of a secondary phase YBa2HfO5.5 in the superconductor without deteriorating the superconducting properties. The variation of sintering temperature, density, critical transition temperature (Tc), magnetic field dependence of critical current density (Jc), and flux‐pinning force (Fp) of YBa2Cu3O7−δ having different proportions of YBa2HfO5.5 formed in the matrix were studied in detail. The samples showed a transition temperature (Tc) of ∼92 K and the self‐field critical current density (Jc) increases significantly up to an optimum value of 5.42 × 104 A cm−2 for 2 wt% addition of nano HfO2. The enhancement of the critical current density in the YBa2Cu3O7−δ‐HfO2 samples is attributed to the presence of the nonreacting YBa2HfO5.5 phase, formed due to the addition of HfO2 as artificial pinning center. The formation of YBa2HfO5.5 in YBa2Cu3O7−δ bulk superconductor also enhances the pinning force density from 3 × 106 to 30.4 × 106 N m−3 at 77 K.

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confidence: 99%

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

Rejith¹,

Vidya²,

Vipinlal³

et al. 2013

Phys. Status Solidi B

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“…The application of HTS cable with YBCO tapes needs to solve the problem of high anisotropy. As to the high anisotropic of critical performance for YBCO tapes, a lot of works have been finished [14][15][16][17][18][19]. The flux diverter placed at both ends of the coil can increase the energy storage capacity and decrease the heat losses for SMES [14].…”

Section: Introductionmentioning

confidence: 99%

“…The flux diverter placed at both ends of the coil can increase the energy storage capacity and decrease the heat losses for SMES [14]. The ferromagnetic disk can be used to adjust the magnetic field orientation to be as close as possible to a parallel angle, which can enhance the critical current of the coil [16]. Inserting air gap (with the same distance) between the pancake coils of the SMES can enhance the critical current, which can further improve the operating performance [17].…”

Section: Introductionmentioning

confidence: 99%

Research on a novel HTS double pancake coil based on CORC: used for kA-level SMES of accelerator

Li¹,

Zheng²,

Sheng³

et al. 2022

Supercond. Sci. Technol.

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Large-scale complex needs high performance SMES system with 5 kA-level current carrying and kA/s current ramping rate (such as particle accelerator complex), the inductance of which should be as small as possible (<<1H) to reduce the terminal voltage and realize ideal energy evacuation. This paper introduces the world’s first application of double pancake (DP) coil with CORC cable, which can be a unit of MJ-level SMES system with a total inductance of 125 mH and 4 kA current carrying (@30 K, 4 T). The combination of low inductance and high current capacity guarantee the safety during kA/s operating condition. The CORC wound with highly anisotropic YBCO tape can realize quasi-isotropy with critical properties. The performance of the CORC with 11 layers and 3 tapes in each layer has been fully validated with excitation test at 77 K and the critical current can reach 2906 A@ 77 K, self-field. The skeleton of the DP coil is specially designed with semi-circular spiral groove and the climbing-layer area is supported by two symmetrical blocks, which can provide reasonable support to the CORC cable. The measured critical current of DP coil can realize 1750 A at 77 K (theoretical value is 1800 A). It means that the the coil winding method is feasible to avoid performance degradation during winding. The DP coil based on CORC cable is fully suitable for the SMES system which needs to realize ~4 kA current carrying and fast energy conversion. It also provides a good practice for the engineering application of CORC cable.

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Application to Magnetic Levitation

Tsuda¹,

Ishiyama²

2011

TEION KOGAKU

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Synopsis: Magnetic levitation systems using HTS bulks, such as magnetic bearing devices for flywheel energy storage systems, transporters, linear actuators, magnetic gears and so on, have been developed by many research groups. Most of the HTS magnetic levitation systems are composed of HTS bulks and permanent magnets. "Stable magnetic levitation without any other control system" is a specific characteristic of the HTS bulks. A non-contact spin processor and a magnetic-levitation seismic isolation device are introduced as magnetic levitation systems that are composed of HTS bulks and permanent magnets.Furthermore, an active magnetic levitation system using spherical HTS bulks for inertial nuclear fusion and a three-dimensional HTS actuator are introduced as magnetic levitation systems with HTS bulks and electromagnets. Levitation force, levitation gap and stability are closely related to the size and shape of the HTS bulk, the magnetic field distribution around the HTS bulk, the conditions in the field-cooling process of the HTS bulk and so on. Achieving large levitation force, large levitation gap and highly stable levitation is very important for practical use of the HTS magnetic levitation system. Theoretical analysis using a numerical simulation code for understanding electromagnetic behaviors within the HTS bulk is useful for improving the levitation force, levitation gap and stability. Finally, numerical techniques based on the finite element method are introduced in this paper.

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Implementation of a Non-Contact X-Y Mover With High Temperature Superconductors

Cited by 3 publications

References 15 publications

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

Research on a novel HTS double pancake coil based on CORC: used for kA-level SMES of accelerator

Application to Magnetic Levitation

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Implementation of a Non-Contact X-Y Mover With High Temperature Superconductors

Cited by 3 publications

References 15 publications

Flux-pinning properties of nanocrystalline HfO2 added YBa2 Cu3 O7−δ superconductor

Flux-pinning properties of nanocrystalline HfO2 added YBa2 Cu3 O7−δ superconductor

Research on a novel HTS double pancake coil based on CORC: used for kA-level SMES of accelerator

Application to Magnetic Levitation

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Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor