JPH01186530A - Excessive current breaker - Google Patents
Excessive current breakerInfo
- Publication number
- JPH01186530A JPH01186530A JP580788A JP580788A JPH01186530A JP H01186530 A JPH01186530 A JP H01186530A JP 580788 A JP580788 A JP 580788A JP 580788 A JP580788 A JP 580788A JP H01186530 A JPH01186530 A JP H01186530A
- Authority
- JP
- Japan
- Prior art keywords
- current
- temperature
- fine wire
- critical temperature
- thin wire
- 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
- 239000002887 superconductor Substances 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/06—Fusible members characterised by the fusible material
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電子回路、電気機器等に直列に接続して、機
器故障等に伴う過大電流を阻止する過大電流しゃ断器に
関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an overcurrent breaker that is connected in series to electronic circuits, electrical equipment, etc. to block excessive current caused by equipment failure.
従来の技術
従来この種の過大電流しゃ断器には、鉛とスズとの合金
細線等を用い、細線を流れる電流のジュール熱により細
線を融かし、電流をしゃ断していた。さらに精密電気機
械等で、過大な電流が流れた場合、より高速で電流をし
ゃ断する必要がある場合、第２図に示すように、両端に
口金１１が取り付けられたガラス管１２内に鉛とスズと
により合金の細線１３が、バネ１４により伸びる方向に
力が加えられ、取り付けられ、細線１３に所定以上の電
流が流れると細線１３が、合金の融点近傍になるとやわ
らかくなり、バネの張力により細線が切断され電流がし
ゃ断されるよう構成されていた。2. Description of the Prior Art Conventionally, this type of overcurrent circuit breaker has used a thin alloy wire of lead and tin, and the Joule heat of the current flowing through the thin wire melts the thin wire to cut off the current. Furthermore, when an excessive current flows in a precision electrical machine, etc., and it is necessary to cut off the current at a higher speed, as shown in Fig. The thin wire 13 of the alloy is attached to the tin by applying force in the direction of extension by the spring 14, and when a current of more than a predetermined value flows through the thin wire 13, the thin wire 13 becomes soft when the temperature approaches the melting point of the alloy, and due to the tension of the spring. It was constructed so that the thin wire was cut and the current was cut off.
発明が解決しようとする課題
しかし、このような構造のものでは、電流が流れ、ジュ
ール熱が発生し、その熱により合金の融点まで細線が温
度上昇する時間過大電流が流れ続ける。従ってし十ｍ１
時間が長いと言う欠点があった。Problems to be Solved by the Invention However, with such a structure, current flows and Joule heat is generated, and the excessive current continues to flow for a period of time until the temperature of the thin wire rises to the melting point of the alloy. Accordingly, 10m1
The drawback was that it took a long time.
そこで本発明は、電流が所定の量よシ大きくなると即座
に電流がしゃ断されるようにするものである。Therefore, the present invention is designed to cut off the current as soon as the current becomes larger than a predetermined amount.
課題を解決するための手段
そして上記課題を解決する本発明の技術的手段は、細線
を超電導体で形成し、細線を臨界温度以下に冷却し超電
導状態で使用することである。A means for solving the problems and a technical means of the present invention for solving the above problems is to form a thin wire with a superconductor, cool the thin wire below a critical temperature, and use it in a superconducting state.
作用 この技術的手段による作用は次のようになる。action The effect of this technical means is as follows.
すなわち、超電導体で形成された細線を、超電導を起こ
す温度以下にしておくことにより、電気抵抗が無い状態
で電流が流れる。超電導状態で流すことができる最大電
流は、臨界温度よりさらに冷却すればするほど大きくな
り、従って臨界温度との温度差によって最大電流が制御
できる。That is, by keeping a thin wire made of a superconductor at a temperature below which superconductivity occurs, current flows in a state where there is no electrical resistance. The maximum current that can flow in a superconducting state increases as the temperature is further cooled below the critical temperature, so the maximum current can be controlled by the temperature difference from the critical temperature.
実施例
以下本発明の一実施例を添付図面にもとすいて説明する
。第１図において、両端に口金１が取り付けられた熱伝
導のすぐれた容器２内に、たとえばＹＢａ２Ｃｕ、０７
−δの材料を用いた超電導細線３を、超電導細線３から
発生する熱がよく蓄積されるように密に、たとえばらせ
ん状に巻かれ、超電導細線３が両端の口金１に接続して
取り付けられている。容器２の外側に、細線３を臨界温
度以下に冷却する温度制御器４が取り付けられている。EXAMPLE An example of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, for example, YBa2Cu, 07
A superconducting thin wire 3 made of a material of ing. A temperature controller 4 is attached to the outside of the container 2 to cool the thin wire 3 below a critical temperature.
超電導細線３は、超電導状態で流し得る最大電流があり
、その最大電流を超えた電流を流すと、ただちに常電導
体にもどり抵抗が生じる。−たび常電導体にもどれば、
流れる電流によりジュール熱が発生し、温度が上がるた
め完全に超電導状態からぬけ出す。もとより超電導細線
は、超電導状態により単位断面積当り大きな電流を流す
ことが出来ていたため、常電導状態で流し得る電流に対
して相当大きな電流により非常に短時間で、超電導細線
は暁き切れてしまう。このようにして電流がしゃ断でき
る。この場合、発生する熱により超電導状態から常電導
状態に変化するのを加速するため、高速で電流をしゃ断
することが出来る。従って超電導細線３の最大電流を、
所定の電流としておけば、過大電流しゃ断器とできる。The superconducting thin wire 3 has a maximum current that can flow in the superconducting state, and when a current exceeding the maximum current flows, it immediately returns to a normal conductor and generates resistance. -If we return to a normal conductor,
The flowing current generates Joule heat, which raises the temperature and completely removes the superconducting state. Of course, superconducting thin wires were able to flow a large current per unit cross-sectional area due to their superconducting state, so the superconducting thin wires would break out in a very short time due to a current that was considerably larger than the current that could be passed in a normal conducting state. . In this way, the current can be cut off. In this case, the heat generated accelerates the change from the superconducting state to the normal conducting state, so the current can be cut off at high speed. Therefore, the maximum current of superconducting thin wire 3 is
If the current is set to a predetermined value, it can be used as an overcurrent breaker.
従って、最大電流は、超電導細線３を臨界温度より冷却
すれば、するほど大きくすることが出来るため、臨界温
度からの温度差を温度制御器で変化させることにより過
大電流しゃ断器のしゃ断電流を設定することが出来る。Therefore, the maximum current can be increased as the superconducting thin wire 3 is cooled below the critical temperature, so the breaking current of the overcurrent breaker is set by changing the temperature difference from the critical temperature using a temperature controller. You can.
加えて、温度制御器の温度を、接続される成気機械等の
動作動態に従って、所定の温度に変化させることにより
、しゃ断電流を刻々変化させることが出来、より精密な
過大電流しゃ断器を構成することが出来る。In addition, by changing the temperature of the temperature controller to a predetermined temperature according to the operating dynamics of the connected air-conditioning machine, etc., the cutoff current can be changed moment by moment, creating a more precise overcurrent breaker. You can.
発明の効果
本発明によれば、過大電流に対して短時間で電流をしゃ
断できる過大電流しゃ断器が出来るばかりでなく、一つ
の過大電流しゃ断器によっても温度制御を行うことによ
り、しゃ断電流の異なる過大電流しゃ断器を構成するこ
とが出来る。さらに接続する電気機器等の動作状態に合
わせて、しゃ断電流を刻々変えることが可能となる。Effects of the Invention According to the present invention, it is possible to not only create an overcurrent breaker that can cut off current in a short period of time in response to excessive current, but also to perform temperature control using one overcurrent breaker. An overcurrent breaker can be configured. Furthermore, it becomes possible to change the cutoff current moment by moment according to the operating state of connected electrical equipment, etc.
第１図は本発明の一実施例の過大電流しゃ断器の概略斜
視図、第２図は従来の過大電流しゃ断器の概略斜視図で
ある。
１・・・・・・口金、２・・・・・・容器、３・・・・
・・超電導細線、４・・・・・・温度制御器。FIG. 1 is a schematic perspective view of an overcurrent breaker according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view of a conventional overcurrent breaker. 1...cap, 2...container, 3...
...Superconducting thin wire, 4...Temperature controller.
Claims (2)
れ、前記線材が臨界温度以下に冷却されており、前記臨
界温度との温度差を変化させることにより、しゃ断電流
の電流値を制御することを特徴とする過大電流しや断器
。(1) A wire made of a superconductor is connected in series with an electric circuit, the wire is cooled below a critical temperature, and the current value of the cutoff current is controlled by changing the temperature difference from the critical temperature. An overcurrent breaker characterized by:
ことを特徴とする特許請求の範囲第１項記載の過大電流
しゃ断器。(2) The overcurrent breaker according to claim 1, wherein the wire made of a superconductor is processed into a spiral shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP580788A JPH01186530A (en) | 1988-01-14 | 1988-01-14 | Excessive current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP580788A JPH01186530A (en) | 1988-01-14 | 1988-01-14 | Excessive current breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01186530A true JPH01186530A (en) | 1989-07-26 |
Family
ID=11621354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP580788A Pending JPH01186530A (en) | 1988-01-14 | 1988-01-14 | Excessive current breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01186530A (en) |
-
1988
- 1988-01-14 JP JP580788A patent/JPH01186530A/en active Pending
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