FURUKAWA ELECTRIC CO LTD:THE;THE;FURUKAWA ELECTRIC CO LTD;古河電気工業株式会社
发明人:
TAKAGI TOMOHIRO,高木 智洋
申请号：
JP2017057210
公开号：
JP2018159637A
申请日:
2017.03.23
申请国别(地区):
JP
年份:
2018
代理人:
摘要：
PROBLEM TO BE SOLVED: To provide a magnetic field generation device capable of generating a magnetic field extremely high in temporal stability even when using the coil of a superconducting wire difficult in superconducting junction and an NMR analysis device and a MRI device provided with the same.SOLUTION: A magnetic field generating device includes: a main coil (11) which is a superconducting coil and generates a magnetic field in the space of an object； and a compensation coil (12) which is a super conduction coil, and connected in series with the main coil. The magnetic field generating device further includes: a first closed circuit (C1) into which an exciting current of the main coil flows； a control coil (21) which is a super conduction coil and magnetically connected to the compensation coil； and a resistor (22) connected in series with the control coil； and a second closed circuit (C2) into which a control current reduced accompanied with a temporal elapse due to power consumption of the resistor flows. An induced electromotive force generated in the compensation coil (12) due to decrease of the control current via an electromagnetic combination between the control coil and the compensation coil has a polarity that induces the current of the same direction as the exciting current of the main coil (11).SELECTED DRAWING: Figure 1【課題】超電導接合の困難な超電導線材のコイルを用いても、時間的な安定度の非常に高い磁場を発生できる磁場発生装置、並びに、これを備えたＮＭＲ分析装置およびＭＲＩ装置を提供する。【解決手段】超電導コイルであり対象の空間に磁場を発生させる主コイル（１１）と、超電導コイルであり主コイルと直列に接続された補償コイル（１２）とを含み、主コイルの励磁電流が流れる第１閉回路（Ｃ１）と、超電導コイルであり補償コイルと磁気的に結合された制御コイル（２１）と、制御コイルと直列に接続された抵抗（２２）とを含み、抵抗の電力消費により時間の経過に伴って減少する制御電流が流れる第２閉回路（Ｃ２）とを備えた装置である。そして、制御コイルと補償コイルとの磁気的な結合を介して制御電流の低減により補償コイル（１２）に生じる誘導起電力が、主コイル（１１）の励磁電流と同じ向きの電流を誘起する極性を有する。【選択図】図１
