Pulsed-field magnetization applied to high-Tc superconductors

Mizutani, Uichiro; Oka, Teruaki; Itoh, Yoshitaka; Yanagi, Y.; Yoshikawa, Masaaki; Ikuta, Hiroshi

doi:10.1016/s0964-1807(98)00106-9

Cited by 115 publications

(64 citation statements)

References 8 publications

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“…Most significantly, the difference in the trapped field with the FC method tends to escalate when the ability of trapping flux lines increases by improving the material characteristic or by decreasing the temperature. Therefore, many efforts have been devoted to overcome this problem and to increase the trapped field by the PFM method [7][8][9][10][11]. Fujishiro et al have achieved a record high trapped field of 5.2 T by PFM for a 46 mm diameter Gd-Ba-Cu-O bulk superconductor that was cooled by a cryogenic refrigerator, which is however still lower than the trapped field achieved by FC magnetization [11].…”

Section: Introductionmentioning

confidence: 99%

Local measurements of the magnetization process of bulk superconductors induced by a pulsed magnetic field

Ikuta

Tokuyama

Yanagi³

2008

J. Phys.: Conf. Ser.

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Section: Introductionmentioning

confidence: 99%

Local measurements of the magnetization process of bulk superconductors induced by a pulsed magnetic field

Ikuta

Tokuyama

Yanagi³

2008

J. Phys.: Conf. Ser.

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“…Similarly, thermal and magnetic diffusion is important for the SSCR because it is based on the shielding capability of a superconductor tube. Furthermore, thermal and magnetic diffusion is also important for the trapping of a magnetic field in a superconductor pellet that is using a pulsed current supply [4][5][6]. As pointed out by Cha [1], to model the coupled thermal and magnetic diffusion and understand how the magnetic field and temperature of the superconductor evolve during a transient, complete information on E(J,T) must be known, presumably from experimental measurement.…”

Section: Introductionmentioning

confidence: 99%

An empirical correlation for E(J, T ) of a melt-cast-processed BSCCO-2212 superconductor under self field

Cha

2003

IEEE Trans. Appl. Supercond.

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Abstract-An empirical correlation is developed for the electrical field strength E(J,T) of a melt-cast processed BSCCO-2212 superconductor. The empirical correlation is based, in part, on the theory of magnetic relaxation and on experimental data at 77 and 87 K. It is developed for temperatures in the range between 77 and 92 K, which is the range of interest for practical devices such as the superconducting fault current limiters. The general form of the correlation may be applicable to other high-Tc superconductors.

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“…Currently, the most convenient way to magnetize a High Temperature Superconducting (HTS) bulk is to use a pulsed magnetic field. This method is called PFM for Pulsed Field Magnetization [3], [4]. It can generate strong magnetic fields while using a relatively compact and simple coil.…”

Section: Introductionmentioning

confidence: 99%

3-D Modeling of Coils for Pulsed Field Magnetization of HTS Bulk Pellets in an Electrical Machine

Berger

Kapek

Colle

et al. 2018

IEEE Trans. Appl. Supercond.

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Abstract-In this work, we propose to study and design a coil used to magnetize, by means of a Pulsed Field Magnetization (PFM) process, an inductor of a radial flux superconducting machine with one pair of poles. Each pole contains four similar HTS bulks of 30 mm diameter arranged in a square pattern. The cryostat already exists for this application and the temperature of the HTS bulks can vary from 4.2 K to their critical temperature, in transient state. For a given primary source of energy, here a capacitor bank of 10 kJ (5 mF, 2 kV) is available, the PFM process depends strongly on the value of the coil inductance used to generate pulsed field, because it defines the waveform of the current: peak value and time constant. Thus, 3D modeling of the coil is required in order to be sure that its inductance and the magnetic field produced will provide a full magnetization of HTS bulks. From the practical point of view, we would like to achieve an average magnetization of each pole around 3 T.In this paper, numerical modeling of coils with different number of turns coupled with circuit's equations is achieved. The maximum magnetic field obtained on the HTS bulks and estimated magnetization at the top center of each HTS bulk, are presented and discussed.

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Pulsed-field magnetization applied to high-Tc superconductors

Cited by 115 publications

References 8 publications

Local measurements of the magnetization process of bulk superconductors induced by a pulsed magnetic field

Local measurements of the magnetization process of bulk superconductors induced by a pulsed magnetic field

An empirical correlation for E(J, T ) of a melt-cast-processed BSCCO-2212 superconductor under self field

3-D Modeling of Coils for Pulsed Field Magnetization of HTS Bulk Pellets in an Electrical Machine

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