Experimental Production of a Real-Scale REBCO Magnet Aimed at Its Application to Maglev

Mizuno, Katsutoshi; Sugino, Motohiko; Tanaka, Minoru; Ogata, Masafumi

doi:10.1109/tasc.2016.2645127

Cited by 50 publications

(20 citation statements)

References 5 publications

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“…This section reviews the voltage fluctuation test results from a real-scale REBCO coil under excitation [1]. The real scale coil consists of 8 pancake coils as shown in Fig.…”

Section: Possibility Of Voltage Monitoringmentioning

confidence: 99%

“…At RTRI, REBCO magnets have been developed with a view to applying them to the maglev system. A real-scale REBCO coil has already been built, and confirmation has been obtained that it can produce the 700 kA magnetomotive force required for a maglev system [1]. (Magnetomotive force is the product of the number of coil turns and the excitation current.)…”

Section: Introductionmentioning

confidence: 99%

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<b>Monitoring and Protection Method of a REBCO Magnet Designed for Electromagnetic Vibration Tests</b>

2020

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REBCO (Rare-Earth Barium Copper Oxide) is a high temperature superconducting material and is suitable for use in on-board maglev train magnets because of its high current density in a high magnetic field. A real-scale REBCO coil was fabricated and its basic performance confirmed. As a next step in this research, electromagnetic vibration tests on ground coils using real-scale REBCO coils are planned. Since electromagnetic vibration tests usually take several weeks to complete, a monitoring and protection system for the REBCO magnet is required. A high-sensitive coil voltage detection method was evaluated.

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“…This section reviews the voltage fluctuation test results from a real-scale REBCO coil under excitation [1]. The real scale coil consists of 8 pancake coils as shown in Fig.…”

Section: Possibility Of Voltage Monitoringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

<b>Monitoring and Protection Method of a REBCO Magnet Designed for Electromagnetic Vibration Tests</b>

2020

Self Cite

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“…The HTS Open-loop magnets based on conduction cooling have been developed, but the 2G HTS closed-loop magnets are not yet practical, mainly owing to the immaturity of superconducting PCS technology, joint technology, and quenching protection. In recent years, researchers at the Railway Technical Research Institute have attempted to manufacture the HTS insulated closed-loop coils; however, owing to the large daily decay rate of the coils' current, there are still difficulties in producing the on-board HTS closed-loop magnets for the EDS system [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Superconducting Non-Insulation Closed-Loop Coils for Electro-Dynamic Suspension System

Yu³

et al. 2021

Electronics

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The null-flux electro-dynamic suspension (EDS) system is a feasible high-speed maglev system with speeds of above 600 km/h. Owing to their greater current-carrying capacity, superconducting magnets can provide a super-magnetomotive force that is required for the null-flux EDS system, which cannot be provided by electromagnets and permanent magnets. Relatively mature high-speed maglev technology currently exists using low-temperature superconducting (LTS) magnets as the core, which works in the liquid helium temperature region (T ⩽ 4.2 K). Second-generation (2G) high-temperature superconducting (HTS) magnets wound by REBa2Cu3O7−δ (REBCO, RE = rare earth) tapes work above the 20 K region and do not rely on liquid helium, which is rare on Earth. In this study, the HTS non-insulation closed-loop coils module was designed for an EDS system and excited with a persistent current switch (PCS). The HTS coils module can work in the persistent current mode and exhibit premier thermal quenching self-protection. In addition, a full-size double-pancake (DP) module was designed and manufactured in this study, and it was tested in a liquid nitrogen (LN2) environment. The critical current of the DP module was approximately 54 A, and it could work in the persistent current mode with an average decay rate measured over 12 h of 0.58%/day.

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“…Open-loop superconducting magnets based on conduction cooling have been developed, but 2G HTS closed-loop magnets still have a long way to be practical, mainly owing to the immaturity of superconducting persistent current switch (PCS) technology, joint technology and quench protection. In recent years, the team of Railway Technical Research Institute has attempted to manufacture HTS closed-loop insulated coils, but due to the large daily decay rate of the coil current, there are still difficulties in producing on-board HTS closed-loop magnets for EDS system [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

High Temperature Superconducting Non-insulation Closed-loop Coils for Electro-dynamic Suspension System

Lu¹,

Wu²,

Yu³

et al. 2021

Preprint

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Null-flux Electro-dynamic suspension (EDS) system promises to be one of the feasible high-speed maglev systems above 600 km/h. On account of its greater current-carrying capacity, superconducting magnet can provide super-magnetomotive force that is required for null-flux EDS system and cannot be provided by electromagnets and permanent magnets. There is already a relatively mature high-speed maglev technology with low temperature superconducting (LTS) magnets as the core, which works in the liquid helium temperature region (T≤4.2 K). 2-Generation high temperature superconducting (HTS) magnet winded by REBa2Cu3O7−δ (REBCO, RE=rare earth) tapes works above 20 K region and do not need to count on liquid helium which is rare on earth. This paper designed HTS no-insulation closed-loop coils applied for EDS system and energized with persistent current switch. The coils can work at persistent current model and has premier thermal quench self-protection. Besides, a full size double-pancake module was designed and manufactured in this paper, and it was tested in liquid nitrogen. The double-pancake module’s critical current is about 54 A and it is capable of working at persistent current model, whose average decay rate measured in 12 hours is 0.58%/day.

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Experimental Production of a Real-Scale REBCO Magnet Aimed at Its Application to Maglev

Cited by 50 publications

References 5 publications

<b>Monitoring and Protection Method of a REBCO Magnet Designed for Electromagnetic Vibration Tests</b>

<b>Monitoring and Protection Method of a REBCO Magnet Designed for Electromagnetic Vibration Tests</b>

High-Temperature Superconducting Non-Insulation Closed-Loop Coils for Electro-Dynamic Suspension System

High Temperature Superconducting Non-insulation Closed-loop Coils for Electro-dynamic Suspension System

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