JPS60234305A - Super-conductive magnet circuit - Google Patents
Super-conductive magnet circuitInfo
- Publication number
- JPS60234305A JPS60234305A JP8947384A JP8947384A JPS60234305A JP S60234305 A JPS60234305 A JP S60234305A JP 8947384 A JP8947384 A JP 8947384A JP 8947384 A JP8947384 A JP 8947384A JP S60234305 A JPS60234305 A JP S60234305A
- Authority
- JP
- Japan
- Prior art keywords
- shim coil
- heater
- pcs
- power supply
- shim
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/006—Supplying energising or de-energising current; Flux pumps
- H01F6/008—Electric circuit arrangements for energising superconductive electromagnets
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は超電導マグネット回路、特に、シムコイル用
永久電流スイッチの０Ｎ−ＯＦＦ用ヒータの結線の仕方
を改良した超電導マグネット回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a superconducting magnet circuit, and particularly to a superconducting magnet circuit in which the connection method of the ON-OFF heater of a persistent current switch for a shim coil is improved.
第１図および第２図は従来の超電導マグネット回路の結
線例を示す。図において、（１）は超電導主コイル、（
２）は超電導シムコイル、（３）は主コイル用永久電流
スイッチ（以下ＰＣＢと言う） 、 （り）はシムコイ
ル用ｐｃｓ 、（ｔ）は主コイル用ＰＣＢ （ｊ）のＯ
Ｎ −ＯＦＦ用ヒータ、（６）はシムコイル用ｐｃｓ
（ｌＩ）の０Ｎ−ＯＦＦ用ヒータ、（７）は主コイル（
１）と主コイル用ｐｃｓ （Ｊ）から成る並列回路、シ
ムコイル（２）とシムコイル用ＰＣＢ （りから成る並
列回路、主コイルＰＣＢ 用ヒータ（ｊ） 、シムコイ
ルＰＣ８用ヒータ（６）を後述する電源に接続するコネ
クタ、（ｇ）は主コイル励磁用電源スィッチ、（９）は
シムコイル励磁用電源スィッチ、（１０）は主コイルＰ
Ｃ８用ヒータ（ｊ）の電源スィッチ、（／／）Ｆｉシム
コイルＰＣ８用上ヒータ６）の電源スィッチ、Ｃｌ２）
は主コイル励磁用電源、（／３）はシムコイル励磁用電
源、（ハリは主コイルＰＣＳヒータ用電源、そして（／
３）はシムコイルＰＣＢヒータ用電源である。FIGS. 1 and 2 show examples of connections of conventional superconducting magnet circuits. In the figure, (1) is the superconducting main coil, (
2) is the superconducting shim coil, (3) is the persistent current switch for the main coil (hereinafter referred to as PCB), (ri) is the PCS for the shim coil, (t) is the PCB for the main coil (j) O
N-OFF heater, (6) is shim coil pcs
(lI) is the 0N-OFF heater, (7) is the main coil (
1) and a parallel circuit consisting of the main coil PCS (J), a parallel circuit consisting of the shim coil (2) and the shim coil PCB (2), a heater (j) for the main coil PCB, and a heater (6) for the shim coil PC8, as described below. (g) is the main coil excitation power switch, (9) is the shim coil excitation power switch, (10) is the main coil P
Power switch for heater (j) for C8, (//) Power switch for Fi shim coil upper heater 6) for PC8, Cl2)
is the main coil excitation power supply, (/3) is the shim coil excitation power supply, (Hari is the main coil PCS heater power supply, and (/3) is the power supply for the shim coil excitation, and (/3) is the power supply for the main coil PCS heater.
3) is the power supply for the shim coil PCB heater.
次に動作について説明する。通常、主コイル（１）また
は複数個のシムコイル（２）のうちのいずれかのシムコ
イル（，２）を励磁、磁界補正する場合、主コイル（１
） 、シムコイル（コ）、主コイルＰＣ８用ヒータ（ｇ
、シムコイルＰＣ８用ヒータ（６）とそれぞれ主コイル
励磁用電源（／コン、シムコイル励磁用電源（／３）、
主コイルＰ ＣＳヒータ用電源（／弘）、シムコイルＰ
ＣＳヒータ用電源（／Ｓ）をコネクタ（ワ）で接続した
後、各シムコイル励磁用電源スィッチ（？）を、ＯＮに
してシムコイル励磁用電源電流を定格電流または補正電
流に調整する。次にシムコイルｐｃｓヒータ用電源スイ
ッチ（／／）を０ＮＫＬ、てシムコイルＰＣ８用ヒータ
（６）に通電し、これによりシムコイル用ｐｃｓ （り
を加熱して常電導化することでシムコイル（２）内を定
格電流または補正電流に調整する。最後に上述したのと
逆の手順でシムコイルＰＣＢヒータ用電源スイッチ（／
／）をＯＦＦにしてシムコイル用ｐｃｓ （りを超電導
化した後、シムコイル励磁用電源スィッチ（９）をＯＦ
Ｆにする。Next, the operation will be explained. Normally, when exciting the main coil (1) or any one of the shim coils (2) and correcting the magnetic field, the main coil (1)
), shim coil (ko), heater for main coil PC8 (g
, heater for shim coil PC8 (6) and main coil excitation power supply (/con, shim coil excitation power supply (/3),
Main coil P CS heater power supply (/Hiro), shim coil P
After connecting the CS heater power supply (/S) with the connector (wa), turn on each shim coil excitation power switch (?) to adjust the shim coil excitation power supply current to the rated current or correction current. Next, turn the shim coil PCS heater power switch (//) to 0NKL to energize the shim coil PC8 heater (6). Adjust to the rated current or correction current.Finally, turn off the shim coil PCB heater power switch (/
After turning off the shim coil PCS (/) and making it superconducting, turn off the shim coil excitation power switch (9).
Make it F.
なお、主コイル（１）またはいずれかのシムコイル（２
）を励磁、磁界補正する場合、それぞれ全てのシムコイ
ル（２）または他のシムコイル（，２）は相互誘導作用
による影響を受けないようＫするために電源に接続され
、シムコイル用ＰＣＢ （りを常電導化した上で、シム
コイル電流は電源によって制御される。In addition, the main coil (1) or one of the shim coils (2
), all shim coils (2) or other shim coils (, 2) are connected to the power supply in order to avoid being affected by mutual induction, and the shim coil PCB ( Once conductive, the shim coil current is controlled by the power source.
従来の超電導マグネット回路は上述したように構成され
ており、主コイル（１）またはシムコイル（コ）の電流
を補正する場合、全てのシムコイルＰＣＢ用ヒータ（６
）に通電することによりシムコイル用ＰＣＢ （りを加
熱して常電導化する必要があり、このためＰＣＢＣ−ヒ
ータネクタ（７）も第１図の時はシムコイルＰＣＢ用ヒ
ータ数×コＸシムコイル個数分、第２図の時はンムコイ
／Ｌ／ＰＣ８用ヒータ数×シムコイル個数分必要とし、
コネクタ（７）の大型化による超電導コイル収納部への
侵入熱量の増加またコネクタ（７）を通じての超電導コ
イル側への侵入熱量の増加、液体Ｈｅの消費量増加、断
熱性能の低下、コネクタの大型化による操作性の悪化な
どの欠点があった。The conventional superconducting magnet circuit is configured as described above, and when correcting the current of the main coil (1) or the shim coil (co), all the shim coil PCB heaters (6
It is necessary to heat the shim coil PCB ( ) to make it conductive, and for this reason, the PCBC-heater connector (7) as shown in Figure 1 is equal to the number of shim coil PCB heaters x x the number of shim coils. In the case of Figure 2, the number of heaters for Nmukoi/L/PC8 x the number of shim coils is required.
Increase in the amount of heat that enters the superconducting coil storage section due to the increase in the size of the connector (7), increase in the amount of heat that enters the superconducting coil side through the connector (7), increased consumption of liquid He, decrease in insulation performance, and large size of the connector. There were drawbacks such as deterioration in operability due to
この発明は上記の°ような従来のものの欠点を除る信頼
性の向上、断熱性能の向上、また操作性のよい超電導マ
グネット回路を提供することを目的としている。The object of the present invention is to provide a superconducting magnet circuit that eliminates the above-mentioned drawbacks of the conventional circuit, has improved reliability, improved heat insulation performance, and is easy to operate.
以下、この発明の実施例を図について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第３図の実施例の場合、シムコイル（２）は第１図およ
び第２図の従来例と同様にシムコイル励磁用電源（１３
）へ個別に接続されるが、シムコイルｐｃｓ用ヒータ（
６）は全℃直列に接続された上で７個のシムコイルＰＣ
Ｓヒータ用電源（２！ｒ）と接続されている。また第７
図の実施例の場合は第３図の実施例と違ってシムコイル
ＰＣ８用ヒータ（６）が７個のシムコイルＰＣ８ヒータ
用電源（／ｊ）に対して全て並列に接続され℃いる。な
お、通常、ヒータ回路の入力は小さいので、ヒータ回路
を直列または並列に接続した場合の電源側端子間の電圧
または電流の増加はコネクタ数の減少に比較すると非常
に小さい。In the case of the embodiment shown in FIG. 3, the shim coil (2) is connected to the shim coil excitation power source (13
), but the shim coil PCS heater (
6) All 7 shim coil PCs are connected in series.
Connected to the S heater power supply (2!r). Also the 7th
In the case of the embodiment shown in the figure, unlike the embodiment shown in FIG. 3, the shim coil PC8 heater (6) is all connected in parallel to the seven shim coil PC8 heater power supplies (/j). Note that since the input to the heater circuit is usually small, the increase in voltage or current between the power supply side terminals when the heater circuits are connected in series or in parallel is very small compared to the decrease in the number of connectors.
以下にこの発明の詳細な説明する。通常、主コイル（１
）またはいずれかのシムコイル（コ）を励磁、磁界補正
する場合、他のシムコイル（コ）は相互誘 。This invention will be explained in detail below. Usually, the main coil (1
) or one of the shim coils (co) is excited and magnetic field corrected, the other shim coils (co) are mutually induced.
導作用による影響をさけるために励磁、磁界補正する主
コイル（１）またはシムコイル（，２）と同様にシムコ
イル励磁用電源（／３）と接続され、かつシムコイル用
ｐｃｓ （りを常電導化した上で、各シムコイル電流は
電源によって制御されている。第３図および第グ図のよ
うにシムコイルＰＣ８用ヒータ（６）をシムコイルＰＣ
Ｓヒータ用電源（／３）と直列または並列に接続するこ
とによりシムコイルＰＣＢ用ヒータ（６）を一括制御す
ることが出来、ひいてハシムコイル用ｐｃｓ （＋）を
一括して超電導状態または常電導状態へ動作させること
が出来る。このためシムコイルＰＣＢヒータ用電源（／
＆）ケシムコイル励磁用電源（１３）毎に設ける必要が
なく、又シムコイルＰＣＢ用ヒータｍ３図と第７図の両
方の実施例において１個で良い。すなわちシムコイルＰ
ＣＢ用ヒータ回路を上述したように直列または並列に接
続することによるシムコイルＰＣＢ ヒ１−タ用電源の
端子間電圧または端子間電流の増加に対するコネクタの
部分的大形化および侵入熱量の増加量はコネクタ数の減
少に比較すると小さく、その結果コネクタの小形化、侵
入熱量の低減が計れる。In order to avoid the influence of conduction, it is connected to the shim coil excitation power supply (/3) in the same way as the main coil (1) or shim coil (2) for excitation and magnetic field correction, and the shim coil PCS (with normal conductivity) Above, each shim coil current is controlled by the power supply.As shown in Figures 3 and 3, the heater (6) for shim coil PC8 is connected to the shim coil PC.
By connecting in series or parallel with the S heater power supply (/3), the shim coil PCB heater (6) can be controlled all at once, and the shim coil PCS (+) can be controlled all at once in a superconducting state or a normal conducting state. It can be operated to For this reason, the power supply for the shim coil PCB heater (/
&) It is not necessary to provide each shim coil excitation power source (13), and only one shim coil PCB heater is required in both the embodiments shown in Fig. 3 and Fig. 7. That is, shim coil P
By connecting the CB heater circuits in series or in parallel as described above, the amount of increase in the amount of heat intrusion due to the increase in the voltage or current between the terminals of the shim coil PCB heater power supply is This is small compared to the reduction in the number of connectors, and as a result, it is possible to downsize the connector and reduce the amount of heat intrusion.
このようにこの発明によれば、シムコイルＰＣ８用ヒー
タ回路を一括して○Ｎ−０ＦＦする回路としたために、
コネクタの小形化、コネクタ数の減少による超電導コイ
ル収納側への侵入熱量の減少によるクライオスタットの
断熱性能の向上、操作性の向上、シムコイルＰＣ８用ヒ
ータの電源数の減少により、省スペース、装置価格の低
減、信頼性向上が得られると云う効果がある。As described above, according to the present invention, since the heater circuit for the shim coil PC8 is made into a circuit that collectively turns ○N-0FF,
The miniaturization of the connector and the reduction in the number of connectors reduce the amount of heat entering the superconducting coil storage side, improving the insulation performance of the cryostat, improving operability, and reducing the number of power supplies for the heater for the shim coil PC8, resulting in space savings and equipment price reduction. This has the effect of reducing noise and improving reliability.
第１図および第１図は従来の超電導マグネット回路の結
線例を示す回路図、第３図および第４図はこの発明によ
る超電導マグネット回路の結線例を示す回路図である。
Ｃ２） ｒｒｉシムコイル、 （４’）はシムコイル用
ＰＣ８。
（／３）はシムコイル励磁用ｔｉ、（Ａ）はシムコイル
ＰＣ８用ヒータ、（／ｊ）はシムコイルＰＣＢヒータ用
電源である。
なお、図中、同一符号は同一または相当部分を示す。1 and 1 are circuit diagrams showing examples of connections of a conventional superconducting magnet circuit, and FIGS. 3 and 4 are circuit diagrams showing examples of connections of a superconducting magnet circuit according to the present invention. C2) rri shim coil, (4') is PC8 for shim coil. (/3) is ti for shim coil excitation, (A) is a heater for shim coil PC8, and (/j) is a power source for shim coil PCB heater. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
並列回路複数個を励磁用電源へ個別に接続した超電導マ
グネット回路において、前記シムコイル用永久電流スイ
ッチの０Ｎ−ＯＦＦ用ヒータ複数個を７個のヒータ用電
源に直列または並列に接続したことを特徴とする超電導
マグネット回路。In a superconducting magnet circuit in which multiple parallel circuits consisting of a shim coil, a permanent current switch for coils, and a persistent current switch for the coil are individually connected to an excitation power source, multiple heaters for ON-OFF of the persistent current switch for the shim coil are connected to a power source for seven heaters. A superconducting magnet circuit characterized by being connected in series or parallel to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8947384A JPS60234305A (en) | 1984-05-07 | 1984-05-07 | Super-conductive magnet circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8947384A JPS60234305A (en) | 1984-05-07 | 1984-05-07 | Super-conductive magnet circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60234305A true JPS60234305A (en) | 1985-11-21 |
| JPH0329167B2 JPH0329167B2 (en) | 1991-04-23 |
Family
ID=13971692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8947384A Granted JPS60234305A (en) | 1984-05-07 | 1984-05-07 | Super-conductive magnet circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60234305A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6367709A (en) * | 1986-09-09 | 1988-03-26 | Mitsubishi Electric Corp | Superconducting magnet device with emergency demagnetizing device |
-
1984
- 1984-05-07 JP JP8947384A patent/JPS60234305A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6367709A (en) * | 1986-09-09 | 1988-03-26 | Mitsubishi Electric Corp | Superconducting magnet device with emergency demagnetizing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0329167B2 (en) | 1991-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |