Working Paper Article Version 2 This version is not peer-reviewed

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

Version 1 : Received: 1 July 2021 / Approved: 12 July 2021 / Online: 12 July 2021 (11:46:31 CEST)
Version 2 : Received: 12 July 2021 / Approved: 13 July 2021 / Online: 13 July 2021 (10:08:02 CEST)

How to cite: Lu, L.; Wu, W.; Yu, X.; Jin, Z. High Temperature Superconducting Non-insulation Closed-loop Coils for Electro-dynamic Suspension System. Preprints 2021, 2021070248 Lu, L.; Wu, W.; Yu, X.; Jin, Z. High Temperature Superconducting Non-insulation Closed-loop Coils for Electro-dynamic Suspension System. Preprints 2021, 2021070248

Abstract

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.

Subject Areas

Electro-dynamic suspension; HTS magnets; no-insulation; closed-loop coils; persistent current model

Comments (1)

Comment 1
Received: 13 July 2021
Commenter: Li Lu
Commenter's Conflict of Interests: Author
Comment: Figure.6 and Figure.7 are changed for worng inserting
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