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Magnetic refrigeration, utilizing the magnetocaloric effect, has seen various applications due to its theoretically high efficiency, including helium liquefaction at 4 K, hydrogen liquefaction at 20 K, and room temperature magnetic cooling. Generally, the magnetocaloric effect becomes more significant with stronger magnetic fields, so when a substantial cooling capacity is required, superconducting magnets are employed. Superconducting magnets are cooled by GM cryocoolers and require dedicated power supplies. Generally, the dedicated power supplies for superconducting magnets are large in size and expensive. In this study, a superconducting magnet system has been fabricated and operated with small switching power supplies rather than a dedicated power supply for superconducting magnet, to examine the feasibility and controllability of superconducting magnet operation.

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  © 2024, IEEE Personal use of this material is permitted.  Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keyword: Magnetic refrigerator, Superconducting magnet, Switching power supply

Date published: 2024-02-23

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Journal:

• IEEE Transactions on Applied Superconductivity (ISSN: 10518223) vol. 34 issue. 5 p. 1-5 3800805

Funding:

• JSPS 23K03703

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5157

First published URL: https://doi.org/10.1109/tasc.2024.3367966

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Updated at: 2026-02-23 16:30:04 +0900

Published on MDR: 2026-02-23 14:04:36 +0900