JPS58202509A - Protecting circuit for superconductive magnet - Google Patents
Protecting circuit for superconductive magnetInfo
- Publication number
- JPS58202509A JPS58202509A JP57085022A JP8502282A JPS58202509A JP S58202509 A JPS58202509 A JP S58202509A JP 57085022 A JP57085022 A JP 57085022A JP 8502282 A JP8502282 A JP 8502282A JP S58202509 A JPS58202509 A JP S58202509A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- resistor
- coil
- superconducting magnet
- energy
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/001—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for superconducting apparatus, e.g. coils, lines, machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野の説明
本発明は超電導磁石がクエンチした時の保護装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Technical Field Description The present invention relates to a protection device when a superconducting magnet is quenched.
従来技術とその問題点
超電導磁石の保護装置としては、第１図１＝示すように
、従来から超電導磁石のコイルｌの両端に保護抵抗３を
設けて超電導磁石の異常時（クエンチ）磁石内でのエネ
ルギー消費を少なくシ、磁石の断線防止及び液体ヘリウ
ムの爆発的な蒸発を抑えてきた。この考え方は超電導磁
石を永久電流スイッチ２を用いて永久電流モードで使用
される場合も同じであった。Conventional technology and its problems As a protection device for a superconducting magnet, as shown in FIG. It has reduced energy consumption, prevented magnet disconnection, and suppressed explosive evaporation of liquid helium. This idea is the same when the superconducting magnet is used in persistent current mode using persistent current switch 2.
ところが、前述の考え方でいくならば永久電流スイッチ
の抵抗値（：対し、外部抵抗は十分に小さいことが要求
される。現在信頼性が高く、かつ、繰返し使用Ｃ：耐え
る永久電流スイッチは、熱式永久電流スイッチしか実用
化されていないこの大きなエネルギーに耐える熱式永久
電流スイッチは、その本質からいって数Ω〜数十〇の抵
抗を有する（二すぎない。この数Ω〜数十Ωよ伏も外部
保護抵抗は十分に低くしなければならないととから、と
りえる値は、例えばクライオスタット５外部で９０チ以
上のエネルギーを受けもつためには１／１０の抵抗をと
らざるを得ない。このことは直流電源で超電導コイルを
励磁するためＣ二は、Ｌ ｄｉ／ｄｔの電圧が必要であ
り、この値は低い抵抗値の保護抵抗への大電流の分流と
なってあられれる。However, if we follow the above-mentioned concept, the resistance value of the persistent current switch (in contrast, the external resistance must be sufficiently small.Currently, persistent current switches that are highly reliable and can withstand repeated use C: Thermal persistent current switches, which can withstand this large amount of energy and which are the only ones in practical use, have a resistance of several ohms to several tens of ohms. Since the external protection resistance must be sufficiently low, for example, in order to receive more than 90 degrees of energy outside the cryostat 5, a resistance of 1/10 must be taken. This means that in order to excite the superconducting coil with a DC power source, a voltage of L di/dt is required for C2, and this value results in a large current being shunted to a protective resistor with a low resistance value.
この分流のため、超電導磁石に所定の電流を流すため分
流外がなくなるまで待つとか、またコイルはたくわえや
れたエネルギーを消費するため（こＬ／Ｈの時定数で決
められる時間をかけなければ、エネルギーを放出できな
い等の問題があった。またコイル電流制御等のくふうを
して、時間短縮をはかるとかする方法があった。このだ
め待つだめの時間短縮Ｃ二おける新しい設備が要求され
、いづれも根本的解決を得るものではない。Because of this shunt, it is necessary to wait until there is no more shunt in order to send a predetermined current to the superconducting magnet, and the coil consumes a lot of stored energy (if you do not take the time determined by the L/H time constant, There were problems such as the inability to release energy.There were also methods such as coil current control to shorten the time.New equipment was required to shorten the waiting time. None of these provide a fundamental solution.
このため、第２図（−示すような回路（二より超電導磁
石に並列にダイオード７を接続し、そのフォワードドロ
ップによってエネルギーの吸収をはかる。For this purpose, a diode 7 is connected in parallel to the superconducting magnet in a circuit as shown in FIG.
またコイルエネルギーが少なくなった際は並列抵抗８（
二より消費する、超電導磁石保護装置が提案されている
。Also, when the coil energy decreases, parallel resistance 8 (
A superconducting magnet protection device that consumes more than two has been proposed.
しかし、この方式によれば、常時エネルギーが少なくな
った際に使用される抵抗がダイオードに並列（二接続さ
れているために分流分を完全になくすことができない。However, according to this method, the shunt cannot be completely eliminated because the resistor used when the energy is constantly low is connected in parallel with the diode.
発明の目的と概要
本発明は保護抵抗の本来有する役目を失うことなく、こ
れらの欠点を除きかつ保護抵抗への分流１″一対する根
本的解決を提供することにある。OBJECTIVES AND SUMMARY OF THE INVENTION The object of the present invention is to eliminate these drawbacks and to provide a fundamental solution to the shunt 1'' to the protective resistor without losing its original role.
コイル励磁時必要とされるコイル両端電圧は保護抵抗３
に第１図１−示す様（二印加される。本発明はサイリス
タを用いその時性Ｃ二より、従来の保護抵抗への分流要
素を阻止する様ｆ１働きかつ超電導コイル及び永久電流
スイッチの閉ループに流れるループ電流の異常発生時の
エネルギーをこのサイリスタ及び保護抵抗にて吸収する
ことにより、従来の保護抵抗器の機能を果すように１〜
たものである。The voltage across the coil required during coil excitation is the protection resistor 3.
The present invention uses a thyristor to prevent the current shunting element to the conventional protection resistor by using a thyristor to prevent the current shunting element to the conventional protection resistor and to close the loop of the superconducting coil and persistent current switch. By absorbing the energy when an abnormality occurs in the flowing loop current with this thyristor and protective resistor, it is possible to perform the function of a conventional protective resistor.
It is something that
発明の構成・作用
第３図に示す如く直流電源４の極性とは逆にかつ超電導
磁石コイルｌ永久電流スイッチ２と並列にサイリスタ９
及び抵抗１０を接続する。次に本発明の詳細な説明する
。コイルクエンチ等にて発生した電圧Ｅを変換器１１（
：よって、パルス信号ｆ二変え、それをサイリスタ点弧
パルスとして利用し、サイリスタ９とこれに直列の抵抗
ｌＯにてエネルギーを消費させる。Structure and operation of the invention As shown in FIG.
and a resistor 10 are connected. Next, the present invention will be explained in detail. The voltage E generated by coil quench etc. is transferred to the converter 11 (
: Therefore, the pulse signal f2 is changed and used as a thyristor firing pulse, and energy is consumed in the thyristor 9 and the resistor 10 connected in series with it.
発明の効果
本発明により、
１ 励磁電圧によって、大きな′電流が分流することな
く、励磁電流設定が非常１：短時間でできる。Effects of the Invention According to the present invention, 1. The excitation current can be set in a very short time without causing a large current to be shunted by the excitation voltage.
２、 コイルクエンチ等が発生した場合（二、そのコイ
ルクエンチにより発生した電圧をサイリスタ点弧パルス
として利用し、サイリスタを通して保護抵抗にて、エネ
ルギーの大半をすみやかに消費できる。2. When a coil quench occurs (2. The voltage generated by the coil quench is used as a thyristor firing pulse, and most of the energy can be quickly consumed through the thyristor and the protective resistor.
３、 サイリスタ素子を使用することによって、従来、
少なくなったコイルエネルギーを消費するために設置し
ていたダイオードとの並列抵抗を削除するととができる
。3. By using thyristor elements, conventional
This can be done by removing the parallel resistance with the diode that was installed to consume the reduced coil energy.
などの効果がある。There are effects such as
第１図、第２図は従来の超電導磁石保護回路図、第３図
は本発明（＝よる回路図。
１・・・超電導磁石のコイル
２・・・永久電流スイッチFigures 1 and 2 are conventional superconducting magnet protection circuit diagrams, and Figure 3 is a circuit diagram according to the present invention (= circuit diagram according to the present invention. 1... Coil of superconducting magnet 2... Persistent current switch
Claims (1)
列に接続し、さらに保護抵抗を直流電源に並列に設けた
超電導磁石回路において、前記保護抵抗に直列にサイリ
スタを挿入し、このサイリスタを超電導磁石コイルの異
常的な発生電圧１：より点弧することを特徴とした超電
導磁石コイル路。In a superconducting magnet circuit in which a superconducting magnet coil is connected to a DC power source, a switch is connected to a persistent current in parallel, and a protective resistor is further provided in parallel to the DC power source, a thyristor is inserted in series with the protective resistor, and this thyristor is connected to the superconducting magnet coil. Abnormal generated voltage 1: Superconducting magnet coil path characterized by more ignition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57085022A JPS58202509A (en) | 1982-05-21 | 1982-05-21 | Protecting circuit for superconductive magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57085022A JPS58202509A (en) | 1982-05-21 | 1982-05-21 | Protecting circuit for superconductive magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58202509A true JPS58202509A (en) | 1983-11-25 |
Family
ID=13847098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57085022A Pending JPS58202509A (en) | 1982-05-21 | 1982-05-21 | Protecting circuit for superconductive magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58202509A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61114509A (en) * | 1984-11-09 | 1986-06-02 | Toshiba Corp | Superconductive coil device |
| US7940029B2 (en) | 2008-07-02 | 2011-05-10 | American Superconductor Corporation | Static VAR corrector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50115794A (en) * | 1974-02-22 | 1975-09-10 |
-
1982
- 1982-05-21 JP JP57085022A patent/JPS58202509A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50115794A (en) * | 1974-02-22 | 1975-09-10 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61114509A (en) * | 1984-11-09 | 1986-06-02 | Toshiba Corp | Superconductive coil device |
| JPH0576162B2 (en) * | 1984-11-09 | 1993-10-22 | Tokyo Shibaura Electric Co | |
| US7940029B2 (en) | 2008-07-02 | 2011-05-10 | American Superconductor Corporation | Static VAR corrector |
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