A Conceptual Design of a Superconducting Magnet for a Magnetic Levitated Train Using a High Tc Oxide Superconducting Wire

Shimohata, Kenji; Takeuchi, Toshie; Yokoyama, Shiyoshi; Yoshimura, Hideto; Nakamura, Shirou; Yamada, Takahiro; Utsunomiya, Shin

doi:10.1007/978-4-431-68195-3_236

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…The problems of coil protection, coil winding, mechanical reliability of current lead and initial cost are not studied. The coil protection is very difficult because of hot-spot of the high-Tc superconductor in case of quench [3]. We expect that the coil protect is unnecessary because the coil is very stable to an extemal disturbance.…”

Section: Discussionmentioning

confidence: 97%

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A conceptual design of a superconducting magnet for MAGLEV using a Bi-based high-Tc tape

Yokoyama

Shimohata

Inaguchi

et al. 1995

IEEE Trans. Appl. Supercond.

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A bstract-A conceptual design of a superconducting magnet for MAGLEV using a Bi-based high-Tc .MAGNET DESIGN superconducting tape is studied. In this study, the This design is based on the magnet for the MAGLEv[l,2]. structure of conductor and coil, AC loss, .stability, current lead, persistent current switch, cryostat structure and cooling system are estimated. The characteristics of our design are as follows;(1) The superconducting coil is cooled by a refrigera-The components of the magnet are designed on basis of existing data and realizable expected value of used materials. A' High-Tc superconducting tor at 20K and is operated by persistent mode. (2)The coil is constructed by 6 pieces of double pancake coils, and each pancake coil is graded by changing conductor size. (3) The temperature rise of the coil is about 2K due to AC loss. (4) The superconducting stability is very high.

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Section: Discussionmentioning

confidence: 97%

“…The magnet for the MAGLEV is used NbTi superconductor and liquid He. We have already proposed 20K cooling superconducting magnet using high-Tc superconductor for the MAGLEV [3]. In other proposal, a conduction cooling Nb3Sn magnet using refrigerator for the MAGLEV was presented [4].…”

Section: Introductionmentioning

confidence: 98%

A conceptual design of a superconducting magnet for MAGLEV using a Bi-based high-Tc tape

Yokoyama

Shimohata

Inaguchi

et al. 1995

IEEE Trans. Appl. Supercond.

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“…When the high-Tc superconductors are applied to the SCM, they can be cooled by liquid nitrogen and their stability will be improved. In using high-Tc superconductors for the SCM of the Maglev system, it is possible to use either a race-track superconducting coil made of high-Tc superconducting wires [4] or a bulkmagnet trapping magnetic flux within bulk superconductors [1], [2]. The bulkmagnet is a characteristic application of high-Tc superconductor.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and flux-trapping experiments of a 198 mm×99 mm bulkmagnet using YBCO superconductors

Kamijo

Fujimoto

2002

IEEE Trans. Appl. Supercond.

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We fabricate a 198 mm 99 mm bulkmagnet, which consists of YBaCuO bulk superconductors that are 33 mm 33 mm in size and 10 mm in thickness in six columns and three rows. Bulk superconductors in this configuration are packed in one or two layers. The bulkmagnet is magnetized by the field-cooling method. The external magnetic field applied to the bulk superconductors is almost uniform at 1.1 T-1.2 T. The bulk superconductors are cooled by liquid nitrogen. As a result of the magnetization, the bulkmagnet can attract clips and mine tools on the surface of the outer vessel like a permanent magnet. The magnetic field at 3 mm from the surface of the outer vessel is larger than 0.14 T in the case of two layers.

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Cryogen free conduction cooled NbTi superconducting magnet for a X-band klystron

et al. 1996

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A cryogen free conduction cooled NbTi superconducting magnet for a X-band klystron was designed,fabricated, and tested successfully. The magnet has a room temperature bore of 190 mm. The rated field distribution, the NbTi coil is separated to three parts and a return yoke is set. The coil is cooled by a twostage Gifford-McMahon cycle refrigerator. The refrigeration capacity is 1.1 W at 6 K and 30 W at 40 K for each stage. Current leads are made of 2223 Bi-based oxide superconductor. The coil was cooled down to superconducting state from temperature in 85 hours. The ultimate temperature of the coil was below power. The magnet was tested successfully and no problem at all is 0.7 T. In order to meet the requested magnetic field fl . MAGNET DESIGN A. NbTi superconducting coilThe solenoid consists of three coils which are wound in series on a stainless steel bobbin. The cold head of the refrigerator is thermally connect-4K, and the coil was energized without quench to 18.5 A ed to each coil bv a coolling: busbar. The magnet " " has a iron yoke to fit the magnetic field distribuwhich was 105% of rated current. The power consumption of 6 kW is 118 of the normal conducting magnet. The thermal leak of 0.2 W into the coil was measured, tion required for the klystron. Figure 1 shows a which was the same value of the design.

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A Conceptual Design of a Superconducting Magnet for a Magnetic Levitated Train Using a High Tc Oxide Superconducting Wire

Cited by 3 publications

References 1 publication

A conceptual design of a superconducting magnet for MAGLEV using a Bi-based high-Tc tape

A conceptual design of a superconducting magnet for MAGLEV using a Bi-based high-Tc tape

Fabrication and flux-trapping experiments of a 198 mm×99 mm bulkmagnet using YBCO superconductors

Cryogen free conduction cooled NbTi superconducting magnet for a X-band klystron

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