The Running Tests of the Superconducting Maglev Using the HTS Magnet

Kuwano, K.; Igarashi, M.; Kusada, S.; Nemoto, Kaoru; Okutomi, T.; Hirano, Satoshi; Tominaga, T.; Terai, Motoaki; Kuriyama, T.; Tasaki, Kenji; Tosaka, Taizo; Marukawa, K.; Hanai, S.; Yamashita, Tomohisa; Yanase, Y.; Nakao, Hiroyuki; Yamaji, M.

doi:10.1109/tasc.2007.899003

Cited by 30 publications

(12 citation statements)

References 4 publications

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“…The high temperature superconducting (HTS) linear motors developed so far can be mainly classified by the principle and structure as follows: 1) HTS linear reluctance motor (LRM) with ordinary copper windings on the primary (stator) and zero-field-cooled (ZFC) HTS bulk poles on the secondary (mover) [1,2]; 2) HTS linear synchronous motor (HTSLSM) with ordinary copper windings on the primary and HTS bulk or coil magnets on the secondary [3][4][5][6][7][8][9][10]; 3) HTSLSM and linear induction motor (LIM) with HTS windings on the primary [11,12]. These HTS linear motors can be further divided into single-sided, double-sided, and cylindrical types according to their structures.…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics of an HTS Linear Synchronous Motor With HTS Bulk Magnet Secondary

Jin

Zheng

Guo

et al. 2011

IEEE Trans. on Ind. Applicat.

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A single-sided high temperature superconducting (HTS) linear synchronous motor (HTSLSM) with HTS bulk magnet array as its secondary has been developed, and a split pulse coil magnetization system is used to obtain the secondary HTS bulk magnet array with alternating magnetic poles. The electromagnetic parameters of the HTSLSM are calculated to reflect its performance. A control system based on voltage space vector pulse width modulation (SVPWM) strategy implemented by the LabVIEW TM software controlled platform is developed to control the HTSLSM. An experimental system is also developed to measure the thrust and normal force of the HTSLSM. By plenty of investigations, the traits of the thrust and normal force have been found out, including the trends versus different exciting currents, different air gap lengths, variable magnetic poles, and different magnet arrangements. Some valuable conclusions are drawn and could benefit to the electromagnetic design and control scheme evaluation for the HTSLSM.KeywordsHigh temperature superconductor (HTS), HTS linear synchronous motor (HTSLSM), HTS bulk magnet, split pulse coil, thrust and normal force.

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Section: Introductionmentioning

confidence: 99%

Performance Characteristics of an HTS Linear Synchronous Motor With HTS Bulk Magnet Secondary

Jin

Zheng

Guo

et al. 2011

IEEE Trans. on Ind. Applicat.

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“…Trains so far have generally used LTS levitation magnets, but the move from prototypes to routine day-by-day operation will clearly make great demands on ruggedness and reliability which will surely favor a higher operating temperature. Full sized BSCO magnets were successfully tested onboard a maglev train in 2005 [47] and a smaller magnet made from 2G coated YBCO coated tape was tested recently [48].…”

Section: Fieldmentioning

confidence: 99%

100 Years of Superconductivity and 50 Years of Superconducting Magnets

Wilson

2012

IEEE Trans. Appl. Supercond.

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This review celebrates the centenary of Kamerlingh Onnes' discovery of superconductivity and also the 50th anniversary of the first conference to discuss superconducting magnets. Our growing understanding of superconductivity and its relationship with magnetic fields is outlined, together with the technical high field superconductors, which first made magnets possible. Engineering problems in utilizing these new materials and the applications which they made possible are described. Just 75 years after Kamerlingh Onnes' discovery, high temperature superconductivity HTS was discovered, opening up a new range of fields and temperatures for magnets. The difficulties of making these new materials into practical magnet conductors are outlined. Some applications of HTS are described and speculations are offered about those areas where it is most likely to succeed in future.

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“…The first problem of HTS is the existence of small resistance. The resistance is small enough for other applications, such as Maglev [4], but too large for a persistent-mode operation with a field stability of less than 0.01 ppm/h. The second problem is the presence of a superconducting joint between HTS and LTS.…”

Section: Requirements Of Hts-nmrmentioning

confidence: 99%

NMR Upgrading Project Towards 1.05 GHz

Toko

Otsuka

Choi

et al. 2008

IEEE Trans. Appl. Supercond.

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An NMR spectrometer over 1 GHz requires the contribution of high-c superconductors (HTS). However, a persistent-mode operation with HTS cannot satisfy the field stability of 0.01 ppm/h at present. This is a great barrier for applying HTS to an NMR magnet. To overcome this problem, a new project was undertaken in Japan in October 2006. In the course of the project, we will develop a highly stabilized power supply, field-compensation methods, and measurement techniques that allow a certain field fluctuation. By integrating them, the feasibility of HTS to NMR will be demonstrated. We performed a long-term operation of a 600 MHz NMR magnet in the driven-mode. Allowable field fluctuation of the existing internal lock system for solution NMR was evaluated by a model experiment. As the next step, the innermost Nb 3 Sn coil of the 600 MHz NMR magnet will be replaced with a Bi-2223 coil, and the field homogeneity, as well as the field stability, will be evaluated. In the final step of the project, the replacement of the innermost coil of the existing 920 MHz NMR magnet will be planned. The targeting field is 24.7 T (1.05 GHz for 1 H NMR resonance frequency). The solid-state NMR on 17 O nuclei in a labeled peptide will be demonstrated using a magic angle spinning probe; the probe has a 1 H decoupling frequency of 1.05 GHz.Index Terms-Field stability, high magnetic field, high temperature superconductor, NMR spectrometer.

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The Running Tests of the Superconducting Maglev Using the HTS Magnet

Cited by 30 publications

References 4 publications

Performance Characteristics of an HTS Linear Synchronous Motor With HTS Bulk Magnet Secondary

Performance Characteristics of an HTS Linear Synchronous Motor With HTS Bulk Magnet Secondary

100 Years of Superconductivity and 50 Years of Superconducting Magnets

NMR Upgrading Project Towards 1.05 GHz

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