A new quench protection system using dual-capacitor switching for fast energy extraction from HTS magnets

Yojong Choi, Woo Seung Lee, Seunghyun Song, Haeryong Jeon, Tae Kuk Ko

Research output: Contribution to journalArticle

Abstract

The higherature superconducting magnets with high magnetic field can store a relatively large amount of energy because of their large inductance and operating current. The magnetic energy stored in the magnet is converted into heat energy when a quench occurs, and the heat generated by the quench resistance and magnet current is sufficient to damage the magnet. Therefore, the large amount of energy stored in a superconducting magnet must be removed quickly to protect the magnet. In this paper, a new quench protection method using a capacitor and dual-switches is proposed and compared to a conventional energy extraction system that uses only a dump resistor. The simulation and test results show that this new protection system is a feasible method for reducing the temperature increase by rapidly reducing the magnet current when a quench occurs.

Original languageEnglish
Article number8691554
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number5
DOIs
Publication statusPublished - 2019 Aug 1

Fingerprint

Magnets
capacitors
Capacitors
magnets
Superconducting magnets
superconducting magnets
energy
heat
inductance
resistors
Inductance
Resistors
switches
Switches
Magnetic fields
damage
magnetic fields
simulation
Temperature
temperature

All Science Journal Classification (ASJC) codes

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

Cite this

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A new quench protection system using dual-capacitor switching for fast energy extraction from HTS magnets. / Choi, Yojong; Lee, Woo Seung; Song, Seunghyun; Jeon, Haeryong; Ko, Tae Kuk.

In: IEEE Transactions on Applied Superconductivity, Vol. 29, No. 5, 8691554, 01.08.2019.

Research output: Contribution to journalArticle

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AU - Lee, Woo Seung

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