Investigation on the transformer-rectifier flux pump for high field magnets

Chao Li; Jianzhao Geng; Boyang Shen; Jun Ma; Jamie Gawith; Tim A. Coombs

doi:10.1109/TASC.2019.2900623

Investigation on the transformer-rectifier flux pump for high field magnets

Chao Li, Jianzhao Geng, Boyang Shen, Jun Ma, Jamie Gawith, Tim A. Coombs

University of Cambridge

Research output: Contribution to journal › Article › peer-review

30 Citations (SciVal)

Abstract

Due to the improvement in the manufacturing of the superconductor, the superconducting magnets have been widely used in the areas such as magnetic resonance imaging (MRI), particle accelerators, and magnetic levitation systems. The transformer-rectifier flux pump is an effective method to energize the superconducting magnets. However, in the real system of the flux pump, some undesired dc current will be inevitably generated in the flux pumping system during the process of energizing the superconducting magnets. The undesired dc current will have many negative impacts such as slowing down the charging process, decreasing the final field of the superconducting magnets, and resulting in the failure of the whole system. This paper will focus on the origin of the undesired dc current in the flux pump, investigate the damage that the undesired dc current causes, and propose an effective method of removing the undesired dc current. The proposed method has greatly improved the performance of the flux pump. An experimental system is built and tests are carried out to verify the practicality and validity of the proposed method.

Original language	English
Article number	8648219
Journal	IEEE Transactions on Applied Superconductivity
Volume	29
Issue number	5
DOIs	https://doi.org/10.1109/TASC.2019.2900623
Publication status	Published - 21 Feb 2019

Bibliographical note

Funding Information:
Manuscript received October 27, 2018; accepted February 15, 2019. Date of publication February 21, 2019; date of current version April 11, 2019. The work of C. Li was supported by the Cambridge Trust under the Cambridge CSC Scholarship (No. 201506250125). (Corresponding author: Jianzhao Geng.) The authors are with the Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge Cb3 0FA, U.K. (e-mail:,jg717@ cam.ac.uk).

Funding

Manuscript received October 27, 2018; accepted February 15, 2019. Date of publication February 21, 2019; date of current version April 11, 2019. The work of C. Li was supported by the Cambridge Trust under the Cambridge CSC Scholarship (No. 201506250125). (Corresponding author: Jianzhao Geng.) The authors are with the Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge Cb3 0FA, U.K. (e-mail:,jg717@ cam.ac.uk).

Keywords

dynamic resistance
flux pump
induced dc current
superconducting magnets

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2019.2900623

Cite this

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abstract = "Due to the improvement in the manufacturing of the superconductor, the superconducting magnets have been widely used in the areas such as magnetic resonance imaging (MRI), particle accelerators, and magnetic levitation systems. The transformer-rectifier flux pump is an effective method to energize the superconducting magnets. However, in the real system of the flux pump, some undesired dc current will be inevitably generated in the flux pumping system during the process of energizing the superconducting magnets. The undesired dc current will have many negative impacts such as slowing down the charging process, decreasing the final field of the superconducting magnets, and resulting in the failure of the whole system. This paper will focus on the origin of the undesired dc current in the flux pump, investigate the damage that the undesired dc current causes, and propose an effective method of removing the undesired dc current. The proposed method has greatly improved the performance of the flux pump. An experimental system is built and tests are carried out to verify the practicality and validity of the proposed method.",

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Investigation on the transformer-rectifier flux pump for high field magnets

Abstract

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Keywords

ASJC Scopus subject areas

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