JPH0191621A - Rush current preventive circuit - Google Patents
Rush current preventive circuitInfo
- Publication number
- JPH0191621A JPH0191621A JP62249143A JP24914387A JPH0191621A JP H0191621 A JPH0191621 A JP H0191621A JP 62249143 A JP62249143 A JP 62249143A JP 24914387 A JP24914387 A JP 24914387A JP H0191621 A JPH0191621 A JP H0191621A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting switch
- switch
- superconducting
- control circuit
- mechanical
- 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
- 230000003449 preventive effect Effects 0.000 title 1
- 230000002265 prevention Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/023—Current limitation using superconducting elements
-
- 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
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は電源投入時、容量性負荷に流れる突入電流全抑
圧する突入電流防止回路に関し、特に電源投入後の定常
時における電力損失の低減と回路自体の長寿命化を考慮
し几突入電流防止回路に関する。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an inrush current prevention circuit that completely suppresses the inrush current flowing into a capacitive load when the power is turned on, and in particular to a reduction in power loss during a steady state after the power is turned on. This article relates to an inrush current prevention circuit that takes into consideration the longevity of the circuit itself.
（従来の技術）
従来、この種の突入電流防止回路は電源ラインに直列に
抵抗器を挿入して突入電流を制限し、定常時にはリレー
またはサイリスタによって抵抗器の両端全短絡すること
によって抵抗器での電力損失を防止していた。(Prior art) Conventionally, this type of inrush current prevention circuit limits the inrush current by inserting a resistor in series with the power supply line, and when the resistor is in steady state, both ends of the resistor are short-circuited using a relay or thyristor. This prevented power loss.
（発明が解決しようとする問題点）
従来の突入電流防止回路は、このように定常時における
突入電流抑圧用抵抗器の電力損失を防ぐためリレーまた
はサイリスタを用いていた。(Problems to be Solved by the Invention) Conventional inrush current prevention circuits have used relays or thyristors to prevent power loss in the inrush current suppression resistor during steady state.
しかしながら、リレーの場合は電力損失を極めて少なく
できるという特徴を有する反面１機械式接点の几め長寿
命を必要とする回路には不適当であるという欠点があっ
た。１次、サイリスタを用いた場合は寿命の面では問題
ないものの。However, although relays have the feature of extremely low power loss, they have the disadvantage that they are unsuitable for circuits that require a long service life of a single mechanical contact. Although there is no problem in terms of life when using a primary thyristor.
サイリスタのオン電圧が零ボルトではなく突入電流抑圧
用抵抗器およびサイリスタ自身での電力損失が生じるた
め入力電圧が低く高効率を必要とする場合には使用でき
ないという問題があった。There is a problem that the on-voltage of the thyristor is not zero volts, and power loss occurs in the inrush current suppression resistor and the thyristor itself, so it cannot be used when the input voltage is low and high efficiency is required.
本発明の目的は上記欠点を解決するもので、長寿命であ
って、定常時の電力損失を零にすることができる突入電
流防止回路全提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and to provide an entire inrush current prevention circuit that has a long life and can reduce power loss to zero during steady state.
（問題点を解決するための手段）
前記目的金達放するために本発明による突入電流防止回
路は入力電源端子の一方に、機械式スイッチと複数のＳ
ＱＵＩＤの並列接続された超伝導スイッチを縦続接続し
、前記入力電源端子間に超伝導スイッチ制御回ａ’を接
続し、前記超伝導スイッチ制御回路の制御出力全前記超
伝導スイッチのコントロール線に接続してなり、前記機
械式スイッチをオンする前に前記超伝導スイッチ制御回
路に電源全印加して、前記超伝導スイッチをオフ制御し
、前記機械式スイッチをオンした後に前記超伝導スイッ
チをオンするように構成しである。(Means for Solving the Problems) In order to achieve the above objective, the inrush current prevention circuit according to the present invention has a mechanical switch and a plurality of S
Superconducting switches connected in parallel of QUID are connected in cascade, a superconducting switch control circuit a' is connected between the input power terminals, and all control outputs of the superconducting switch control circuit are connected to control lines of the superconducting switch. and before turning on the mechanical switch, apply full power to the superconducting switch control circuit to control off the superconducting switch, and after turning on the mechanical switch, turn on the superconducting switch. It is configured as follows.
（実施例） 以下、図面を参照して本発明をさらに詳しく説明する。(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.
第１図は本発明による突入電流防止回路の一実施例を示
すブロック図である。FIG. 1 is a block diagram showing an embodiment of an inrush current prevention circuit according to the present invention.
入力電源端子１が、機械式スイッチ２の一端と超伝導ス
イッチ制御回路４の電源端子の一端にそれぞれ接続され
ている。磯様式スイッチ２の他端は超伝導スイッチ３全
介して出力４子６に接続されている。超伝導スイッチ制
御回路４の電源端子の他端は入力電源端子５に、制御信
号出力は超伝導スイッチ３のコントロール線にそれぞれ
接続されている。An input power terminal 1 is connected to one end of a mechanical switch 2 and one end of a power terminal of a superconducting switch control circuit 4, respectively. The other end of the rock-style switch 2 is connected to the output 4 through the superconducting switch 3 . The other end of the power supply terminal of the superconducting switch control circuit 4 is connected to the input power supply terminal 5, and the control signal output is connected to the control line of the superconducting switch 3, respectively.
いま、入力端子１．５間に電圧が印７７１Ｎされると超
伝導スイッチ制御回路４が動作全開始し、制御信号出力
からは超伝導スイッチ３金オフにする信号が出力される
。超伝導スイッチ３はオフ状態では数オームの抵抗値を
有している。ここで、機械式スイッチ２を投入すると、
数オームの抵抗値で制限された電流が入力電流端子１、
機械式スイッチ２、超伝導スイッチ３および出力端子６
を介して１図示しない負荷側に流れる。Now, when a voltage 771N is applied between the input terminals 1.5, the superconducting switch control circuit 4 starts full operation, and a signal to turn off the superconducting switch is output from the control signal output. The superconducting switch 3 has a resistance value of several ohms in the off state. Now, when mechanical switch 2 is turned on,
A current limited by a resistance value of several ohms is input to the input current terminal 1,
Mechanical switch 2, superconducting switch 3 and output terminal 6
1 to the load side (not shown).
その後、超伝導スイッチ制御回路４内の任意の時定数に
より決定された遅延時間で超伝導スイッチ３をオンさせ
る信号が超伝導スイッチ制御回路より出力されるので、
超伝導スイッチ３はオンとなる。After that, the superconducting switch control circuit outputs a signal that turns on the superconducting switch 3 at a delay time determined by an arbitrary time constant in the superconducting switch control circuit 4.
The superconducting switch 3 is turned on.
この状態では抵抗は零となり、定常時における′電力消
費は零となる。In this state, the resistance becomes zero, and the power consumption during steady state becomes zero.
（発明の効果）
以上、説明したように本発明は機械式スイッチの前段に
超伝導スイッチ制御回路を接続し機械式スイッチの後段
に超伝導スイッチを接続し。(Effects of the Invention) As described above, the present invention connects a superconducting switch control circuit before a mechanical switch, and connects a superconducting switch after the mechanical switch.
超伝導スイッチ制御回路の出力信号を超伝導スイッチの
コントロール線に接続し、機械式スイッチ投入時突入電
流を超伝導スイッチのオフ時の抵抗値により制限し、定
常時にに超伝導スイッチをオンするように構成して定常
時の電力損失全零にするものである。し次がって電子機
器を高効率に構成でき、かつ従来のようにリレーを用い
ない之め信頼性が高く長寿命であるという利点がある。The output signal of the superconducting switch control circuit is connected to the control line of the superconducting switch, and the inrush current when the mechanical switch is turned on is limited by the resistance value when the superconducting switch is off, so that the superconducting switch is turned on during normal operation. It is designed to reduce power loss to zero during steady state. In turn, electronic equipment can be constructed with high efficiency, and since it does not use relays as in the past, it has the advantage of being highly reliable and having a long life.
第１図は本発明による突入電流防止回路の実施例を示す
ブロック図である。
１・・・入力電源端子 ２・・・機械式スイッチ３・
・・超伝導スイッチ
４・・・超伝導スイッチ制御回路
５・・・入力電源端子 ６・・・出力端子特許出願人
日本電気株式会社FIG. 1 is a block diagram showing an embodiment of an inrush current prevention circuit according to the present invention. 1... Input power terminal 2... Mechanical switch 3.
...Superconducting switch 4...Superconducting switch control circuit 5...Input power supply terminal 6...Output terminal Patent applicant NEC Corporation
Claims (1)
ＩＤの並列接続された超伝導スイッチを縦続接続し、前
記入力電源端子間に超伝導スイッチ制御回路を接続し、
前記超伝導スイッチ制御回路の制御出力を前記超伝導ス
イッチのコントロール線に接続してなり、前記機械式ス
イッチをオンする前に前記超伝導スイッチ制御回路に電
源を印加して前記超伝導スイッチをオフ制御し、前記機
械式スイッチをオンした後に前記超伝導スイッチをオン
するように構成したことを特徴とする突入電流防止回路
。A mechanical switch and multiple SQUs are connected to one of the input power terminals.
cascading superconducting switches connected in parallel to each other, and connecting a superconducting switch control circuit between the input power terminals;
A control output of the superconducting switch control circuit is connected to a control line of the superconducting switch, and before turning on the mechanical switch, power is applied to the superconducting switch control circuit to turn off the superconducting switch. An inrush current prevention circuit characterized in that the inrush current prevention circuit is configured to turn on the superconducting switch after the mechanical switch is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62249143A JPH0191621A (en) | 1987-10-02 | 1987-10-02 | Rush current preventive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62249143A JPH0191621A (en) | 1987-10-02 | 1987-10-02 | Rush current preventive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0191621A true JPH0191621A (en) | 1989-04-11 |
Family
ID=17188561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62249143A Pending JPH0191621A (en) | 1987-10-02 | 1987-10-02 | Rush current preventive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0191621A (en) |
-
1987
- 1987-10-02 JP JP62249143A patent/JPH0191621A/en active Pending
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