Distribution of Trapped Magnetic Flux in Superconducting Stacks Magnetised by Angled Field

Smara, Anis; Climente-Alarcón, Vicente; Glowacki, B.A.

doi:10.1007/s10948-019-05375-3

Cited by 8 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The area scanned is limited to 16 x 16 mm, and hence not the whole trapped field can be depicted. More details about the measurement device can be found in [16].…”

Section: Resultsmentioning

confidence: 99%

Superconducting Magnetic Heterostructured Components for Electric Motor Applications

Climente-Alarcón

Mineev

Smara

et al. 2020

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

Trapped flux magnets made by stacking high temperature superconducting tape portray an easy assembly with already available materials, high mechanical resistance, provided by the substrate and improved thermal stability, which enhances the trapped flux compared to bulks. This allowed reaching the world record of 17.7 T. The presented analysis expands previous work with wide superconducting tapes showing further possible improvements in this kind of devices in order to be used as source of magnetic flux in electrical motors, substituting permanent magnets. The aims are to increase the trapped magnetic flux during magnetization and decrease the leakage flux at the edges of the magnet during the operation of the machine. This is expected to be achieved by either introducing new materials in-between the individual tapes, such as ferromagnetic layers, or modifying the composition of the substrate. The results of simulations using the H-formulation as well as experimental measurements are presented.

show abstract

“…The area scanned is limited to 16 x 16 mm, and hence not the whole trapped field can be depicted. More details about the measurement device can be found in [16].…”

Section: Resultsmentioning

confidence: 99%

Superconducting Magnetic Heterostructured Components for Electric Motor Applications

Climente-Alarcón

Mineev

Smara

et al. 2020

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

show abstract

“…B is here the local strength of magnetic induction. J c0 and B 0 are fitted to match the experimental data presented in this and some previous papers [13,23]. Parameters α, β and γ are assumed to be 1, 0.67 and 2.77 [26].…”

Section: Numericalmentioning

confidence: 94%

“…One of the stacks (A) investigated in this work is shown in figure 2. Scanning Hall probe magnetometry was employed to measure the trapped flux density B z , on the surface of the stacks [22,23]. The measurement stand is schematically described in figure 3.…”

Section: Methodsmentioning

confidence: 99%

Magnetic flux in stacks of superconducting tapes of different architecture

Harca

Machaj

Glowacki

2020

Supercond. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

Stacks of superconducting tapes nowadays have multiple applications and many new modifications are currently considered to enhance their beneficial properties. We have studied the field trapping in stacks of commercial superconducting tapes with different configurations. Experimental and numerical analyses were performed. The superconducting stacks were magnetized to act as powerful permanent magnets using pulsed field magnetization and field cooling at 77 K. The configurations include a basic stack made of layered tapes, a stack interlayered with ferromagnetic material, a sectioned stack made of thin tapes and a shielded basic stack. The present study shows that, in terms of total trapped flux, the basic stack performs best, closely followed by the shielded stack. No significant positive effect due to the presence of ferromagnetic layers was found in the studied configuration. The sectioned stack is the worst according to every analysed criterion. The possibility of application of the analysed modification is discussed.

show abstract

“…Li et al measured and calculated the decay of the trapped magnetic field in a stack subjected to traveling magnetic waves with the H-formulation method 22 . Tomkow and Smara et al studied the distribution of the trapped magnetic flux in a superconducting stack magnetized by an angled field 23 . Smara then reported an experimental assessment of superconducting stack demagnetization in which stacks are used as magnetic poles in the rotor 11 .…”

mentioning

confidence: 99%

Numerical modelling of soldered superconducting REBCO stacks of tapes suggests strong reduction in cross-field demagnetization

Pardo

2023

Sci Rep

View full text Add to dashboard Cite

Stacks of superconducting REBCO tapes (or “stacks”) can trap high magnetic fields, above 17 T. However, relatively low oscillating transverse magnetic fields can fully demagnetize the stacks. This is an issue if the stacks act as poles in the rotor of a superconducting motor, for instance. Here, we study the drastic suppression of cross-field demagnetization in stacks by soldering the tapes at the ends using a normal conductor. In particular, we analyzed by numerical modeling a stack of five REBCO thin films connected at the ends by resistances. The computed trapped field of a stack with zero solder resistance decays very fast at the beginning but then tends to stabilize to relatively high values, while the trapped field of an isolated stack (infinite resistance at the ends) decays further (it decays to zero if the transverse field is above the parallel penetration field). For intermediate solder resistances, the stable value of the trapped magnetic field is in between those of the isolated and zero-resistance configurations. Since the stable trapped field in soldered stacks increases with the number of tapes, stacks of sufficiently high number of soldered tapes could be immune to cross-field demagnetization. This opens the gate for a new kind of superconductors that mostly behave as bulks, especially if the stacks are made of delaminated tapes or it is possible to solder the tapes by very low resistance.

show abstract

Distribution of Trapped Magnetic Flux in Superconducting Stacks Magnetised by Angled Field

Cited by 8 publications

References 29 publications

Superconducting Magnetic Heterostructured Components for Electric Motor Applications

Superconducting Magnetic Heterostructured Components for Electric Motor Applications

Magnetic flux in stacks of superconducting tapes of different architecture

Numerical modelling of soldered superconducting REBCO stacks of tapes suggests strong reduction in cross-field demagnetization

Contact Info

Product

Resources

About