Strong Magnetic Field Generator Containing HTS Bulk Magnets and Compact Refrigerators

Oka, Tetsuo; Hirayama, Eri; Kanai, Tomoyuki; Ogawa, J.; Fukui, Satoshi; Satô, Takao; Yokoyama, K.; Nakamura, Takashi

doi:10.1109/tasc.2013.2284859

Cited by 26 publications

(11 citation statements)

References 22 publications

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“…Multiple seeding technique has been used to increase the size of YBCO bulks [3,4,5]. The 2G HTS bulks have been demonstrated as trapped field magnets for electrical machines [6,7], as well as self-stabilising bearings for energy storage flywheels and magnetic separation devices [8,9]. The magnetization of 2G HTS bulks has been studied extensively, partly because it is one of the key challenges.…”

Section: Introductionmentioning

confidence: 99%

A new ring-shape high-temperature superconducting trapped-field magnet

Sheng

Zhang

Wang

et al. 2017

Supercond. Sci. Technol.

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This paper presents a new type of trapped field magnet made of second generation high temperature superconducting (2G HTS) rings. This so-called ring-shape 2G HTS magnet has the potential to provide much stronger magnetic fields than existing permanent magnets. Compared to existing 2G HTS trapped field magnets, e.g. 2G HTS bulks and stacks, this new ring-shape 2G HTS magnet provides a promising technique to produce lager dimension magnets for industrial applications. This paper focuses on the working mechanism of this new structure magnet, both experimental and numerical study based on commercial magnetization techniques were carried out. Unique features have been identified and quantified for this new type of HTS magnet in field cooling and zero field cooling process. The magnetization mechanism is explained from the view of shielding and penetration of external magnetic field. An accumulation in the trapped field was observed by using multiple pulse field cooling. Besides, three types of demagnetization were also studies to ensure the practical properties of the ring-shape magnets. Conclusions obtained in this paper shows that this new ring-shape HTS magnet is very promising in trapping high magnetic field. As a super permanent magnet, it will have impacts in large-scale industrial applications, e.g. developing HTS machines with very high power density.

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Section: Introductionmentioning

confidence: 99%

A new ring-shape high-temperature superconducting trapped-field magnet

Sheng

Zhang

Wang

et al. 2017

Supercond. Sci. Technol.

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“…This parameter is limited by the saturation of the stator and rotor magnetic steel and by the magnet or field winding capability. Nevertheless, with the use of superconducting bulk magnets, the achieved value of trapped field is far stronger, beating a maximum of 17.6 T [51], [52], [53]. Even if the conditions for the study are inconceivable for a high-speed rotating electrical machine, it leads the way to the possibility of reaching higher mean airgap flux density values.…”

Section: A Power Densitymentioning

confidence: 99%

Review of High Power and High Voltage Electric Motors for Single-Aisle Regional Aircraft

et al. 2022

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This paper presents a review of the state of the art in electric propulsion for regional aircraft in the MW range. The implications surrounding the implementation of this technology, such as the need of high-power density or the use of high-voltage at high-altitude, are presented. Along with the challenges, the available technologies to face them are reviewed. Those are, as follows, the emerging new motor topologies for this purpose, the winding technologies, the materials employed for electric motors for aircraft propulsion and the ground-breaking use of high-temperature superconductors (HTS) as a high-power density enabler. Finally, a conclusion is presented gathering the main ideas of the paper.INDEX TERMS Aircraft propulsion, electric motor, high-power, high-temperature superconductor, high-voltage.

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“…For YBCO r max ¼ 25-30 MPa. 154,169 Several methods are used in order to circumvent the rupture: adding silver to the process of preparation for bulk samples, [159][160][161] using a metal tie band (rings of stainless steel, [124][125][126]153,154,[159][160][161]170,171 as in Fig. 21, or of an aluminum alloy 163,166 ) steeping with adhesive in vacuum, 156,158,172 and hardening using carbon fibers or fiberglass.…”

Section: A Trapped (Captured) Magnetic Fieldmentioning

confidence: 99%

High-temperature superconductors of the family (RE)Ba2Cu3O7-δ and their application (Review Article)

Бондаренко

Koverya

Krevsun

et al. 2017

Low Temperature Physics

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This review article is a commemoration of the 30th anniversary of the discovery of YBa 2 Cu 3 O 7-d high-temperature superconductors (HTSCs). As a result of this discovery a family of (RE)Ba 2 Cu 3 O 7-d (RE stands for "rare earth") HTSCs has found great practical use. The review article consists of a brief history of how YBa 2 Cu 3 O 7-d was conceived and five sections describing the family of compounds: crystallography, phase diagrams, manufacturing techniques, main superconducting properties, and fields of application.

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Strong Magnetic Field Generator Containing HTS Bulk Magnets and Compact Refrigerators

Cited by 26 publications

References 22 publications

A new ring-shape high-temperature superconducting trapped-field magnet

A new ring-shape high-temperature superconducting trapped-field magnet

Review of High Power and High Voltage Electric Motors for Single-Aisle Regional Aircraft

High-temperature superconductors of the family (RE)Ba2Cu3O7-δ and their application (Review Article)

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