Development of quench detection/protection system based on active power method for superconducting magnet by using capacitor circuit

Nozomu Nanato, T. Otsuka, S. Hesaka, S. Murase

Research output: Contribution to journalArticle

1 Citation (Scopus)


When a quench occurs in a superconducting magnet, excessive joule heating in normal region may damage the magnet. It is necessary to detect the quench as soon as possible and discharge magnetic energy stored in the magnet. The authors have presented a quench detection/protection system based on an active power method which detects the quench regardless of a self-inductive and mutual-inductive voltages and electromagnetic noise. In the conventional active power method, the inductive voltages are removed by cancel coils. In this paper, the authors propose a method to cancel an inductive voltage using a capacitor circuit. The quench detection/protection system becomes more precise and smaller than the conventional system through the capacitor circuit.

Original languageEnglish
Pages (from-to)305-309
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Publication statusPublished - Jan 15 2013



  • Active power method
  • Capacitor circuit
  • Quench detection
  • Quench protection
  • Superconducting magnet

ASJC Scopus subject areas

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

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