The effect of magnet size on the levitation force and attractive force of single-domain YBCO bulk superconductors

Yang, Wenjie; Chao, Xiaolian; Bian, Xiaobing; Liu, P; Feng, Yang; Zhang, P X; Zhou, Lian

doi:10.1088/0953-2048/16/7/308

Cited by 33 publications

(17 citation statements)

References 26 publications

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“…We report that negative force up to 2 N were measured during the ascending run at higher temperature produced by the deeper penetration of currents. Negative force during the ascending run is also reported by other authors [17], [20], [30] 3. Currents of the descending runs (successive to the first) completely wipe out currents of the ascending runs.…”

Section: A Zero Field Coolingsupporting

confidence: 85%

The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

Morandi

Fabbri

Ribani

et al. 2018

IEEE Trans. Appl. Supercond.

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The levitation force between a single grain YBCO cylindrical bulk superconductor and a permanent magnet is investigated. The force measured both in zero field cooling and field cooling condition in the temperature range 20 K-80 K is reported. The dependence of peak levitation force and power dissipation on the temperature is analyzed and the saturation of the peak force with increasing the critical current of the material is pointed out. A numerical analysis is also carried out for understanding the electrodynamics of the levitation mechanism. Good reproduction of the measured data is obtained and relevant observed phenomena, such as hysteresis of the levitation cycle at high temperature and saturation of the peak force at low temperature, are explained by means of the model. Characterization of the material in terms of critical current density in the field range 0 T-0.5 T is also obtained by means of the numerical model by means of the fitting of the measured data.

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Section: A Zero Field Coolingsupporting

confidence: 85%

The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

Morandi

Fabbri

Ribani

et al. 2018

IEEE Trans. Appl. Supercond.

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“…While providing a useful point of reference, the research on levitation is mostly performed using small-scale systems with permanent magnets serving as the sources of the magnetic flux. The results obtained with such setups are susceptible to the geometry of the magnet and the superconductor, as shown by Yang et al [28].…”

Section: Introductionmentioning

confidence: 91%

Calculation of a magnetic force acting on small superconducting celestial bodies

Tomkow

2021

Eur. Phys. J. Plus

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Recent discoveries of superconducting phases in the samples of meteorites suggest the possibility of a natural occurrence of superconducting state in space. Superconductors are known to exhibit interesting behaviours when subjected to external magnetic fields, such as levitation. Similar force may act on a superconducting bit in space. The goal of this paper is to quantify this force and assess its effects. Several scenarios in which a superconducting bit can be produced and interact with a magnetic field in space are suggested. The force acting on a superconductor in different conditions is calculated with numerical simulations. The dependence on a magnetic flux density, its gradient, and the geometry and the properties of the superconductor are found. The empirical formulas are derived and used to calculate a magnetic force. The resultant force is extremely weak in all analysed scenarios. It is found that its strength decreases rapidly with the distance from the source of the magnetic flux. Its effect on trajectory of the superconductor is almost negligible. Some possibilities of increasing its strength and the effects are considered.

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“…First, the size and flux pinning force of the YBCO bulk superconductor must be improved to get a higher levitation force. Second, the track has to be well designed to improve the levitation force and the guidance force of the model, because these properties are very sensitive to S538 the magnetic field distribution of the track [11]. Third the FC cooling gap has to be carefully investigated to get both a high levitation force and a guidance force.…”

Section: Resultsmentioning

confidence: 99%

A small Maglev car model using YBCO bulk superconductors

Yang

Zhou

Feng

et al. 2006

Supercond. Sci. Technol.

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Models of two small Maglev cars have been made. The track was paved with NdFeB magnets. The arrangement of the magnets made it easy to get a uniform magnetic field distribution along the length of the track and a magnetic field gradient in the lateral direction. When the car with YBCO bulk superconductors was field cooled to LN 2 temperature at a certain distance above the track, the car could be automatically levitated over the track and moved along the track without any obvious friction. The model can be used to demonstrate the Meissner effect and a fast transportation system to students and adults.

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The effect of magnet size on the levitation force and attractive force of single-domain YBCO bulk superconductors

Cited by 33 publications

References 26 publications

The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

The Measurement and Modeling of the Levitation Force Between Single-Grain YBCO Bulk Superconductors and Permanent Magnets

Calculation of a magnetic force acting on small superconducting celestial bodies

A small Maglev car model using YBCO bulk superconductors

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