Title:
SUPERCONDUCTING MAGNET DEVICE AND NUCLEAR MAGNETIC RESONANCE DIAGNOSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/048179
Kind Code:
A1
Abstract:
A superconducting magnet device (10) is equipped with a superconducting coil (11) and an excitation power supply (23) for exciting the superconducting coil (11). A protective resistor (25) and a superconducting bias element (15) which has a high-temperature superconductor as a wire material are connected in parallel to the superconducting coil (11). The current capacity of the superconducting bias element (15) is sufficiently less than the rated operation current of the superconducting coil (11). The superconducting bias element (15) electrically shorts the superconducting coil (11) in a low-resistance state when a prescribed magnetic field is created, and when the magnetic field changes, performs an operation for spontaneously changing the switching state by changing to a high-resistance state and changing the current supply amount from the excitation power supply (23) to the superconducting coil (11).
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Inventors:
WAKUDA TSUYOSHI (JP)
Application Number:
PCT/JP2023/028156
Publication Date:
March 07, 2024
Filing Date:
August 01, 2023
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01F6/00; A61B5/055; H01F6/04
Foreign References:
| JP2020068293A | 2020-04-30 | |||
| JPH10294213A | 1998-11-04 | |||
| JP2009273673A | 2009-11-26 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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