Design and market considerations for axial flux superconducting electric machine design

Ainslie, Mark; George, Ashley F; Shaw, R. J.; Dawson, Lewis; Winfield, Andy; Steketee, Marina; Stockley, Simon

doi:10.1088/1742-6596/507/3/032002

Cited by 16 publications

(11 citation statements)

References 25 publications

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“…ARGE, SINGLE-GRAIN bulk high-temperature superconducting materials can trap large magnetic fields over 17 T at temperatures below 30 K [1], [2] and up to 3 T at the technologically important temperature of 77 K [3]. This makes them attractive as permanent magnet equivalents (as so-called trapped field magnets) in a number of practical applications, such as rotating machines [4]- [7] and magnetic separation [8]. However, in standard melt-processed Y-Ba-Cu-O (YBCO) samples, macro-segregation of Y-211 inclusions can limit the macroscopic critical current density, J c , and can M. D. Ainslie would like to acknowledge financial support from a Royal Academy of Engineering Research Fellowship.…”

Section: Introductionmentioning

confidence: 99%

Pulsed Field Magnetization of Single-Grain Bulk YBCO Processed From Graded Precursor Powders

Ainslie

Mochizuki

Fujishiro

et al. 2016

IEEE Trans. Appl. Supercond.

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Large, single-grain bulk high-temperature superconducting materials can trap high magnetic fields in comparison with conventional permanent magnets, making them ideal candidates to develop more compact and efficient devices, such as actuators, magnetic levitation systems, flywheel energy storage systems and electric machines. However, macrosegregation of Y-211 inclusions in melt-processed Y-Ba-Cu-O (YBCO) limits the macroscopic critical current density of such bulk superconductors, and hence, the potential trapped field. A new fabrication technique using graded precursor powders has recently been developed by our research group, which results in a more uniform distribution of Y-211 particles, in order to further improve the superconducting properties and trapped field capability of such materials.In this paper, experimental results on the pulsed field magnetization (PFM) of a graded, single grain YBCO bulk sample are presented. Pulsed fields of magnitude up to 5.5 T were applied to the sample at temperatures of 40 K and 65 K. The trapped field profiles indicate that magnetic flux enters the sample in a more uniform manner than standard YBCO samples, resulting in a higher overall trapped field and indicating the success of this processing technique to produce a more homogeneous sample. Index Terms-Trapped field magnets, bulk superconductors, graded YBCO, pulsed field magnetization, magnetic flux penetration

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Section: Introductionmentioning

confidence: 99%

Pulsed Field Magnetization of Single-Grain Bulk YBCO Processed From Graded Precursor Powders

Ainslie

Mochizuki

Fujishiro

et al. 2016

IEEE Trans. Appl. Supercond.

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“…When the cost performance of 2G-HTS tapes reaches the equivalent of copper, it is possible to gain widespread acceptance and largescale application. Therefore, to improve the cost-effectiveness of 2G-HTS tapes and promote more market applications, researchers must further enhance the current-carrying performance, production efficiency and yield of 2G-HTS finished tapes [143][144][145][146][147][148] and excavate existing technologies while exploring new component structures, technical routes, or transformative technologies.…”

Section: Cost Performance and Market Competitiveness Of 2g-hts Tapesmentioning

confidence: 99%

Advances in second-generation high-temperature superconducting tapes and their applications in high-field magnets

Wang¹,

Dong²,

Huang³

et al. 2022

Soft Sci

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Second-generation high-temperature superconducting (2G-HTS) tapes based on REBa2Cu3O7-x (REBCO, RE: rare earth) materials enable the energy-efficient and high-power-density delivery of electricity, thereby promoting the development of clean energy generation, conversion, transmission, and storage. To overcome the weak grain-boundary connection and poor mechanical properties of these superconductors, a thin-film technology for epitaxy and biaxial textures based on flexible substrates has been developed. In recent years, high-quality 2G-HTS tapes have been produced at the kilometer scale and used in superconducting demonstration projects. This review first summarizes the development of HTS materials and briefly expounds the properties of REBCO superconducting materials. Subsequently, the structural characteristics, preparation methods, and current research progress of 2G-HTS tapes are given. In addition, the applications of REBCO tapes in constructing high-field magnets are also briefly reviewed.

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“…We are currently investigating the design of an allsuperconducting axial flux-type electric machine using HTS materials in both bulk and wire forms [7], [10] and evaluating the performance of test HTS coils for this. As a starting point, this involves carrying out the measurement of the in-field critical current density properties of commercial HTS coated conductor.…”

Section: Introduction Ecentlymentioning

confidence: 99%

Modeling and Comparison of In-Field Critical Current Density Anisotropy in High-Temperature Superconducting (HTS) Coated Conductors

Ainslie

Raine

et al. 2016

IEEE Trans. Appl. Supercond.

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Design and market considerations for axial flux superconducting electric machine design

Cited by 16 publications

References 25 publications

Pulsed Field Magnetization of Single-Grain Bulk YBCO Processed From Graded Precursor Powders

Pulsed Field Magnetization of Single-Grain Bulk YBCO Processed From Graded Precursor Powders

Advances in second-generation high-temperature superconducting tapes and their applications in high-field magnets

Modeling and Comparison of In-Field Critical Current Density Anisotropy in High-Temperature Superconducting (HTS) Coated Conductors

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