Magnetic field generating device

Patent metadata

Field	Value
Publication number	US-12482587-B2
Application number	US-202218555539-A
Country	US
Kind code	B2
Filing date	Mar 29, 2022
Priority date	Apr 20, 2021
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A magnetic field generating device 1 comprises: an iron core 2 ; a pair of superconducting coils 3 ; and one or a pair of vacuum heat-insulation containers 4 , wherein the iron core includes: a yoke 21 ; and a pair of split iron core portions 22 that are formed separately from the yoke, are located inside the yoke, and face each other with a work space therebetween, each of the pair of superconducting coils is wound around a different one of the pair of split iron core portions in a circumferential direction about an axis that is parallel to a direction in which the pair of split iron core portions face each other, a pair of split iron core coil assemblies 5 are stored in the one or pair of vacuum heat-insulation containers, and the yoke is located outside the one or pair of vacuum heat-insulation containers.

First claim

The invention claimed is:

1 . A magnetic field generating device comprising:
an iron core; a pair of superconducting coils; and one or a pair of vacuum heat-insulation containers, wherein the iron core includes:
a substantially C-shaped or substantially U-shaped yoke; and
a pair of split iron core portions that are formed separately from the yoke, are located inside the yoke, and face each other with a work space therebetween,
each of the pair of superconducting coils is wound around a different one of the pair of split iron core portions in a circumferential direction about an axis that is parallel to a direction in which the pair of split iron core portions face each other, a pair of split iron core coil assemblies each composed of the split iron core portion and the superconducting coil wound around the split iron core portion are stored in the one or pair of vacuum heat-insulation containers, and the yoke is located outside the one or pair of vacuum heat-insulation containers.

2 . The magnetic field generating device according to claim 1 , wherein
in at least one of the pair of split iron core coil assemblies,
an outer circumferential surface of the split iron core portion has an annular stepped portion that faces the work space and is recessed toward an inner side in an orthogonal-to-axis direction, and
the superconducting coil is wound around the stepped portion in the circumferential direction.

3 . The magnetic field generating device according to claim 1 , wherein
in at least one of the pair of split iron core coil assemblies,
an outer circumferential surface of the split iron core portion has an annular groove, and
the superconducting coil is wound around the groove in the circumferential direction.

Assignees

• Teral Inc
• Univ Niigata

Inventors

• Kawashima Hiroshi
• Ito Tetsuya
• Fukui Satoshi

Classifications

• H01F27/24 Primary

  Magnetic cores · CPC title

• H01F6/04

  Cooling · CPC title

• H01F6/06 Primary

  Coils, e.g. winding, insulating, terminating or casing arrangements therefor · CPC title

• H01F7/20

  without armatures (cores H01F3/00; coils H01F5/00 {; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381}) · CPC title

• Y02E40/60

  Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment · CPC title