Calculated E-I characteristics of HTS pancakes and coils exposed to inhomogeneous magnetic fields

Adanny, Y; Wolfus, Y.; Friedman, A.; Kopansky, F; Yeshurun, Y.; Bar-Haim, Z; Ron, Z; Pundak, N.

doi:10.1088/1742-6596/43/1/261

Cited by 9 publications

(5 citation statements)

References 4 publications

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“…current of the HTS coil by considering the non-uniform distribution of J, either by considering that the current density is close to its critical value depending on the MFD, i.e. J ≈ J c (B) [7], or by combining the E(J) and J c (B) laws, where generally, the electric field E is considered constant in a tape section, and the convergence criterion is based on an evaluation of the average electric field over the coil [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

DC modeling and characterization of HTS coils with non uniform current density distribution

Fawaz¹,

Menana²,

Douine³

et al. 2021

Supercond. Sci. Technol.

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In this paper, a fast and realistic approach is proposed for the DC modeling of superconducting coils made of first-generation (1G) high temperature superconducting (HTS) tapes, taking into consideration the non-uniformity of the electric current density distribution in the HTS tapes cross-section, by using a power minimization criterion with the dependence of the critical current density on the magnetic flux density (MFD). Integral equations are used to evaluate the MFD, enabling to discretize only the active parts of the system. The model is then combined with an inverse procedure for the characterization of non-inductive HTS coils using measurements.

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Section: Introductionmentioning

confidence: 99%

DC modeling and characterization of HTS coils with non uniform current density distribution

Fawaz¹,

Menana²,

Douine³

et al. 2021

Supercond. Sci. Technol.

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“…5) Calculating the voltage of the pancake winding (4) where is the length of the turn. If this voltage exceeded the quench voltage of the pancake winding, new current was generated using Evolution strategy.…”

Section: B Flow For the Calculation Of Critical Currentsmentioning

confidence: 99%

“…A number of attempts have been made to estimate the operating current of HTS magnets. Some of the works were based on the relation [2], [3] and others were based on -relation [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Current Estimation of an HTS BSCCO Magnet Having Multiple Power Sources Based on the Field Dependent $E{\hbox{–}}J$ Relation

Kang

Koo

Lee

et al. 2009

IEEE Trans. Appl. Supercond.

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Due to the anisotropy of a tape-shaped HTS wire, the method to determine the operating current of an HTS magnet needs to be different from that of a LTS magnet. This paper presented estimation of the critical current of pancake windings excited by multiple power sources. Critical currents were determined by using field dependent -relation. A new method to define the magnetic field of the HTS wire has been proposed in this paper. Calculated critical currents of pancake windings were compared with measured ones of the HTS BSCCO magnet consisting of 10 pancake windings. Effects of multiple power excitation on the increment of the central magnetic field has been also described. Test results showed the estimated critical currents of pancake windings agreed well with that of measured ones and the central magnetic field was increased at multiple power excitation by 28.4% comparing with that of single power excitation.Index Terms--relation, HTS BSCCO magnet, multiple power excitation, pancake winding.

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“…Non-uniform current distribution in a HTS tape has not been considered when the critical current has been estimated. Current distribution in a HTS tape has been studied in some papers [4,5]. This paper shows the current distribution in the BSCCO-2223 tape which is used to wind a HTS magnet.…”

Section: Introductionmentioning

confidence: 99%

Properties of a HTS magnet consisting of pancake windings by using the E-J method

Kim¹,

Kang²,

Paik³

et al. 2011

Progress in Superconductivity and Cryogenics

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Abstract--In a High temperature superconducting (HTS) tape with high aspect ratio, the magnetic field applied to the HTS tape can be different considerably within the HTS tape. The current distribution in the HTS tape is generally non-uniform because the current distribution is strongly dependent on the applied magnetic field. Non-uniform current distribution in a HTS tape has not been properly considered when the critical current has been estimated. This paper shows the calculation of critical current of a HTS magnet consisting of pancake windings. Non-uniform distribution of current in the HTS tape is considered during the calculation of the critical current. Results of calculation show the current concentrated in the middle part of the HTS tape which is used for one pancake winding.

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Calculated E-I characteristics of HTS pancakes and coils exposed to inhomogeneous magnetic fields

Cited by 9 publications

References 4 publications

DC modeling and characterization of HTS coils with non uniform current density distribution

DC modeling and characterization of HTS coils with non uniform current density distribution

Current Estimation of an HTS BSCCO Magnet Having Multiple Power Sources Based on the Field Dependent $E{\hbox{–}}J$ Relation

Properties of a HTS magnet consisting of pancake windings by using the E-J method

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