JPH08171845A - Latch-type relay circuit - Google Patents
Latch-type relay circuitInfo
- Publication number
- JPH08171845A JPH08171845A JP31226494A JP31226494A JPH08171845A JP H08171845 A JPH08171845 A JP H08171845A JP 31226494 A JP31226494 A JP 31226494A JP 31226494 A JP31226494 A JP 31226494A JP H08171845 A JPH08171845 A JP H08171845A
- Authority
- JP
- Japan
- Prior art keywords
- current
- switch
- main switch
- closing
- relay
- 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
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- Relay Circuits (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、閉用励磁コイルにより
閉となり開用励磁コイルにより開となるラッチ型リレー
回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch type relay circuit which is closed by a closing exciting coil and opened by an opening exciting coil.
【０００２】[0002]
【従来の技術】スイッチを閉にする閉用励磁コイルおよ
び開にする開用励磁コイルにより開閉されるラッチ型リ
レーと、開となるようにバネで付勢されており、閉にす
るためには閉用励磁コイルで閉にしている間持続して励
磁電流を流し、開にするときこの励磁電流を遮断するよ
うにしたノンラッチ型リレーがある。一般にはノンラッ
チ型リレーが用いられる。これは電源が事故などで遮断
された場合、自動的にリレーは開となるので安全性が高
いためである。2. Description of the Related Art A latch type relay that is opened and closed by a closing excitation coil that closes a switch and an opening excitation coil that opens, and a spring-biased opening so that the switch can be closed. There is a non-latch type relay in which an exciting current is continuously supplied while the closing exciting coil is closed and the exciting current is interrupted when the closing coil is opened. Generally, a non-latch type relay is used. This is because if the power is cut off due to an accident or the like, the relay is automatically opened, which is highly safe.
【０００３】[0003]
【発明が解決しようとする課題】宇宙空間などで負荷に
電源から電流を供給ための主スイッチにはラッチ型リレ
ーが用いられる。これは大きな電流、例えば５０アンペ
アを遮断するスイッチとなると、ノンラッチ型リレーの
場合、スイッチを閉としている期間連続して使用してい
る閉用励磁コイルで消費される電力が大きくなるためで
ある。ラッチ型リレーの場合、オン、オフ指令によって
閉用励磁コイル、開用励磁コイルにより開閉される期間
のみ各励磁コイルに通電されるので、励磁コイルによる
消費電力は少ない。しかし、このため閉となっていると
きに事故などで電源が遮断さたときは、閉の状態が維持
される。なお、負荷への電流を供給する場合、最初は少
しづつとしある程度流してから、主スイッチを投入して
ラッシュ電流を押さえるようにするソフトスタート方式
が一般に採用され負荷を保護している。A latch type relay is used as a main switch for supplying a current from a power source to a load in outer space or the like. This is because, in the case of a switch that cuts off a large current, for example, 50 amperes, in the case of a non-latch type relay, the power consumed by the closing excitation coil that is continuously used while the switch is closed is large. In the case of the latch type relay, each exciting coil is energized only during the period in which it is opened / closed by the closing exciting coil and the opening exciting coil in response to the ON / OFF command, so the power consumption by the exciting coil is small. However, because of this, when the power is cut off due to an accident while it is closed, the closed state is maintained. In addition, when supplying the current to the load, a soft start method is generally adopted in which the current is supplied little by little at first and then the main switch is turned on to suppress the rush current to protect the load.
【０００４】図２はラッチ型リレーを負荷への主スイッ
チとした回路の一例を示す。主スイッチ１は直流電源を
負荷Ｃ１に接続する。閉用励磁コイル２、開用励磁コイ
ル３は主スイッチ１をそれぞれ閉、または開とする。制
御スイッチＬＲはオン信号でセット端子Ｓに接続し、抵
抗Ｒ１により電流を制限しながら負荷Ｃ１に電流を供給
する。この電流によりトランジスタＱ１、Ｑ２はオンす
る。Ｑ２がオンするとＦ点の電位は０となるのでトラン
ジスタＱ３はオンしない。負荷Ｃ１の電位が電源の電位
に近くなると流れ込む電流が止まり、Ｑ１、Ｑ２はオフ
となるため、Ｆ点の電位が正となりＱ３がオンし、閉用
励磁コイル２が作動して主スイッチ１はオンとなる。こ
の場合負荷Ｃ１は充電されているのでラッシュ電流は生
じない。しかし電源が遮断されると主スイッチ１はオン
の状態のままであり、電源が復帰したときラッシュ電流
が流れる。このように、ラッチ型リレーで事故などで電
源が遮断され閉の状態で電源が復帰したときソフトスタ
ート方式は行われず、ラッシュ電流が発生するという問
題がある。FIG. 2 shows an example of a circuit in which a latch type relay is used as a main switch for a load. The main switch 1 connects the DC power supply to the load C1. The closing excitation coil 2 and the opening excitation coil 3 close or open the main switch 1, respectively. The control switch LR is connected to the set terminal S by an ON signal, and supplies the current to the load C1 while limiting the current with the resistor R1. This current turns on the transistors Q1 and Q2. When Q2 turns on, the potential at point F becomes 0, so transistor Q3 does not turn on. When the potential of the load C1 approaches the potential of the power supply, the current that flows in stops, and Q1 and Q2 turn off. Therefore, the potential at point F becomes positive, Q3 turns on, the closing excitation coil 2 operates, and the main switch 1 turns on. It turns on. In this case, since the load C1 is charged, the rush current does not occur. However, when the power supply is cut off, the main switch 1 remains in the ON state, and a rush current flows when the power supply is restored. As described above, when the power is cut off due to an accident or the like in the latch type relay and the power is restored in the closed state, the soft start method is not performed and there is a problem that a rush current is generated.
【０００５】本発明はかかる問題点に鑑みてなされたも
ので、ラッチ型リレーを電源遮断時強制的に開放するラ
ッチ型リレー回路を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a latch type relay circuit for forcibly opening the latch type relay when the power source is cut off.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、スイッチを閉にする閉用励磁コイルおよび開にする
開用励磁コイルにより開閉され負荷に電流を供給する主
スイッチと、オン信号でセット端子に電源を接続しオフ
信号でリセット端子に電源を接続する制御スイッチと、
該制御スイッチがセット端子に接続されると前記負荷に
抵抗を介して電流を供給し所定の量に達すると閉用励磁
コイルを励磁して主スイッチを閉とし、この閉により流
れる電流によって閉用電磁コイルへの通電を遮断する閉
用回路と、主スイッチが閉となり通過する電流によって
動作して制御スイッチのリセット端子と開用励磁コイル
を導通させ、オフ信号で制御スイッチがリセット端子に
電源を接続すると主スイッチを開とする第１リレーとを
備えたラッチ型リレー回路において、電源より充電され
る充電部と、電源が遮断されると充電部から電流を流し
て開用励磁コイルを励磁し主スイッチを開とする第２リ
レーとを備える。In order to achieve the above-mentioned object, a main switch for closing a switch and a main switch for opening and closing by an open exciting coil for supplying a current to a load and an ON signal are set. A control switch that connects the power supply to the terminal and connects the power supply to the reset terminal with an off signal,
When the control switch is connected to the set terminal, a current is supplied to the load through a resistor and when a predetermined amount is reached, the closing exciting coil is excited to close the main switch, and the closing current is used to close the switch. The closing circuit that shuts off the power supply to the electromagnetic coil, and the main switch that is closed to operate by the passing current to make the reset terminal of the control switch and the opening exciting coil conductive, and the OFF signal causes the control switch to supply power to the reset terminal. In a latch-type relay circuit including a first relay that opens a main switch when connected, a charging unit charged by a power source and a current flowing from the charging unit when the power source is cut off to excite an opening exciting coil. And a second relay that opens the main switch.
【０００７】[0007]
【作用】制御スイッチにオン信号がくると抵抗を介して
電流が負荷に徐々に供給され、負荷が充電されてくる
と、閉用励磁コイルに通電され、主スイッチがオンす
る。これにより主スイッチオン時ラッシュ電流は流れな
い。また、主スイッチに流れる電流で閉励磁コイルへの
通電が止まるともに、第１リレーにより開励磁コイルは
制御スイッチのリセット端子に接続される。これにより
制御スイッチにオフ信号がくれば、開励磁コイルに通電
され主スイッチは開となる。充電部は電源より充電され
ており、第２リレーは電源が遮断されると開励磁コイル
に充電部の電流を通電して開励磁コイルを作動させ、主
スイッチを開とする。これにより電源が復帰したとき、
主スイッチは開となっているので、負荷への電流供給は
制御スイッチにより行われることになり、ラッシュ電流
の発生を防止できる。When the ON signal comes to the control switch, the current is gradually supplied to the load through the resistor, and when the load is charged, the closing exciting coil is energized and the main switch is turned on. As a result, no rush current flows when the main switch is turned on. Further, the current flowing through the main switch stops the energization of the closed exciting coil, and the open exciting coil is connected to the reset terminal of the control switch by the first relay. As a result, when the control switch receives an OFF signal, the open exciting coil is energized and the main switch is opened. The charging unit is charged by the power source, and when the power source is cut off, the second relay energizes the open exciting coil with the current of the charging unit to operate the open exciting coil and open the main switch. When the power is restored by this,
Since the main switch is open, the current is supplied to the load by the control switch, and the generation of rush current can be prevented.
【０００８】[0008]
【実施例】以下、本発明の実施例について図面を参照し
て説明する。図１は本発明の実施例の構成を示す回路図
である。図２と同一符号は同一の意味を表す。電源は直
流でＡは正端子、Ｂは負端子である。主スイッチ１は閉
励磁コイル２により閉となり、開励磁コイル３により開
となる。両励磁コイル２、３にはツェナダイオードＺが
直列に２個設けられ、各１５Ｖ（ボルト）づつでコイル
が３０Ｖの電位となるようにしている。直列に配置され
たダイオードＤはコイルからの逆電圧がツェナダイオー
ドＺに印加されないようにする。負荷Ｃ１は容量性を有
するものとする。Ｑ１、Ｑ２、Ｑ３はトランジスタでス
イッチとして動作する。制御スイッチＬＲはオン信号に
より電源をセット端子Ｓに接続し、オフ信号により電源
をリセット端子Ｒに接続する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention. The same reference numerals as those in FIG. 2 represent the same meanings. The power source is direct current, A is a positive terminal, and B is a negative terminal. The main switch 1 is closed by the closed excitation coil 2 and opened by the open excitation coil 3. Two exciting coils 2 and 3 are provided with two Zener diodes Z in series so that the coils have a potential of 30 V for each 15 V (volt). The diode D arranged in series prevents the reverse voltage from the coil from being applied to the Zener diode Z. The load C1 is assumed to be capacitive. Q1, Q2, and Q3 are transistors and operate as switches. The control switch LR connects the power supply to the set terminal S by an ON signal, and connects the power supply to the reset terminal R by an OFF signal.
【０００９】第１リレーＲＹ１は主スイッチが閉となる
と開励磁コイル３と制御スイッチＬＲのリセット端子Ｒ
を接続し、開となると遮断する。充電部Ｃ２はコンデン
サで直列のツェナダイオードＺとダイオードＤに並列に
接続されている。ツェナダイオードＺは充電部Ｃ２を３
０Ｖに保ち、ダイオードＤは励磁コイル２、３からの逆
電圧を阻止する。第２リレーＲＹ２は電源に接続され、
ツェナダイオードＺにより３０Ｖの電圧で励磁され、電
源が遮断されるとリセット端子Ｒに接続されて開励磁コ
イル３と充電部Ｃ２を接続し、開励磁コイル３を作動さ
せ主スイッチ１を開とする。第１リレーＲＹ１と第２リ
レーＲＹ２はいずれも、主スイッチ１のような大きな電
流は流れないので、ノンラッチ型リレーとしている。When the main switch of the first relay RY1 is closed, the open exciting coil 3 and the reset terminal R of the control switch LR are opened.
Connect and shut off when opened. The charging section C2 is connected in parallel with a Zener diode Z and a diode D in series by a capacitor. Zener diode Z connects charging unit C2 to 3
Keeping at 0V, the diode D blocks the reverse voltage from the excitation coils 2,3. The second relay RY2 is connected to the power source,
It is excited by the Zener diode Z at a voltage of 30 V, and when the power is cut off, it is connected to the reset terminal R to connect the open exciting coil 3 and the charging section C2, and operate the open exciting coil 3 to open the main switch 1. . Both the first relay RY1 and the second relay RY2 are non-latch type relays because a large current unlike the main switch 1 does not flow.
【００１０】次に動作について説明する。制御スイッチ
ＬＲにオン信号がくると、電源はセット端子Ｓに接続さ
れ、抵抗Ｒ１を通り電流が負荷Ｃ１に徐々に流入する。
この電流によりトランジスタＱ１、Ｑ２はオンするが、
Ｑ２のオンによりＦ点の電位は０となるのでＱ３はオン
しない。負荷Ｃ１の充電が進み電位が電源に近くなると
負荷Ｃ１への電流も止まり、Ｑ１、Ｑ２はオフする。す
るとＦ点は正の電位となるのでＱ３がオンし、閉励磁コ
イル２が作動して主スイッチ１は閉となる。このとき負
荷Ｃ１は充電しているのでラッシュ電流は流れない。主
スイッチ１が閉となるとリレーＲＹ１が励磁されそのセ
ット端子Ｓに接続され、制御スイッチＬＲがオフ信号で
リセット端子Ｒに接続されれば、開励磁コイル３に通電
し主スイッチ１を開とする状態になる。Next, the operation will be described. When an ON signal comes to the control switch LR, the power supply is connected to the set terminal S, and the current gradually flows into the load C1 through the resistor R1.
This current turns on the transistors Q1 and Q2,
When Q2 turns on, the potential at point F becomes 0, so Q3 does not turn on. When the charge of the load C1 progresses and the potential approaches the power supply, the current to the load C1 also stops, and Q1 and Q2 are turned off. Then, since the point F has a positive potential, Q3 is turned on, the closing excitation coil 2 is activated, and the main switch 1 is closed. At this time, since the load C1 is being charged, the rush current does not flow. When the main switch 1 is closed, the relay RY1 is excited and connected to its set terminal S, and when the control switch LR is connected to the reset terminal R with an OFF signal, the open excitation coil 3 is energized to open the main switch 1. It becomes a state.
【００１１】充電部Ｃ２は電源に常に接続されているの
で、ツェナダイオードＺにより３０Ｖで充電されてい
る。また、第２リレーＲＹ２も電源に接続されており、
セット端子Ｓに接続している。このような状態で、事故
などにより電源が遮断されると、第２リレーＲＹ２は励
磁がなくなりリセット端子Ｒに接続し、充電部Ｃ２から
の電流が開励磁コイル３に流れ主スイッチ１を開にす
る。これにより電源が復帰しても負荷Ｃ１に電流が流れ
ることはない。電源が復帰すると充電部Ｃ２は放出した
電流の充電を行い、第２リレーＲＹ２は励磁を開始しセ
ット端子Ｓに接続して、充電部Ｃ２と開励磁コイル３と
の接続を遮断する。これにより制御スイッチＬＲによる
主スイッチ１のソフトスタートが可能になる。Since the charging section C2 is always connected to the power source, it is charged at 30V by the Zener diode Z. The second relay RY2 is also connected to the power source,
It is connected to the set terminal S. In such a state, when the power is cut off due to an accident or the like, the second relay RY2 is not excited and is connected to the reset terminal R, and the current from the charging section C2 flows into the open exciting coil 3 to open the main switch 1. To do. As a result, no current flows through the load C1 even if the power supply is restored. When the power is restored, the charging unit C2 charges the released current, the second relay RY2 starts excitation and connects to the set terminal S, and disconnects the charging unit C2 and the open excitation coil 3. This allows the soft start of the main switch 1 by the control switch LR.
【００１２】[0012]
【発明の効果】以上の説明から明らかなように、本発明
は、スイッチを閉にする閉用励磁コイルおよび開にする
開用励磁コイルにより開閉されるラッチ型リレーに、充
電部と第２リレーを設け、電源が遮断されたときは第２
リレーにより充電部の電流で開励磁コイルを用いてスイ
ッチを開とするようにしたので、電源復帰にスイッチを
通して負荷にラッシュ電流が流れるのを防止することが
できる。また閉用励磁コイルおよび開用励磁コイルには
スイッチを開閉するときのみ励磁電流を流せばよいの
で、ノンラッチ型リレーを使用する通常の方式に対し
て、消費電力が少なくて済み、宇宙機器等の電力リソー
スを制限される装置に適している。As is apparent from the above description, the present invention provides a latch type relay that is opened and closed by a closing excitation coil that closes a switch and an opening excitation coil that opens a switch, a charging section and a second relay. If the power is cut off, the second
Since the switch is opened by the relay using the open exciting coil with the current of the charging unit, it is possible to prevent the rush current from flowing to the load through the switch when the power is restored. In addition, since the exciting current only needs to flow to the closing exciting coil and the opening exciting coil when the switch is opened and closed, it consumes less power than a normal method using a non-latching type relay, and can be used in space equipment. Suitable for devices with limited power resources.
【図１】本発明の実施例のリレー回路を示す図である。FIG. 1 is a diagram showing a relay circuit according to an embodiment of the present invention.
【図２】従来のラッチ型リレー回路を示す図である。FIG. 2 is a diagram showing a conventional latch type relay circuit.
１ 主スイッチ ２ 閉励磁コイル ３ 開励磁コイル Ａ 電源正端子 Ｂ 電源負端子 Ｃ１ 負荷 Ｃ２ 充電部 ＬＲ 制御スイッチ ＲＹ１ 第１リレー ＲＹ２ 第２リレー Ｑ１，Ｑ２，Ｑ３ トランジスタ（閉用回路） Ｄ ダイオード Ｚ ツェナダイオード Ｒ１ 抵抗 Ｓ セット端子 Ｒ リセット端子 1 Main Switch 2 Closed Excitation Coil 3 Opened Excitation Coil A Power Supply Positive Terminal B Power Supply Negative Terminal C1 Load C2 Charging Section LR Control Switch RY1 1st Relay RY2 2nd Relay Q1, Q2, Q3 Transistor (Circuit for Closing) D Diode Z Zener Diode R1 Resistance S Set terminal R Reset terminal
Claims (1)
び開にする開用励磁コイルにより開閉され負荷に電流を
供給する主スイッチと、オン信号でセット端子に電源を
接続しオフ信号でリセット端子に電源を接続する制御ス
イッチと、該制御スイッチがセット端子に接続されると
前記負荷に抵抗を介して電流を供給し所定の量に達する
と閉用励磁コイルを励磁して主スイッチを閉とし、この
閉により流れる電流によって閉用電磁コイルへの通電を
遮断する閉用回路と、主スイッチが閉となり通過する電
流によって動作して制御スイッチのリセット端子と開用
励磁コイルを導通させ、オフ信号で制御スイッチがリセ
ット端子に電源を接続すると主スイッチを開とする第１
リレーとを備えたラッチ型リレー回路において、電源よ
り充電される充電部と、電源が遮断されると充電部から
電流を流して開用励磁コイルを励磁し主スイッチを開と
する第２リレーとを備えたことを特徴とするラッチ型リ
レー回路。1. A main switch that is opened and closed by a closing excitation coil that closes a switch and an opening excitation coil that opens and supplies a current to a load, and a power supply is connected to a set terminal by an on signal and a reset terminal by an off signal. When the control switch is connected to the set terminal and the control switch is connected to the set terminal, a current is supplied to the load through a resistor and when a predetermined amount is reached, the closing exciting coil is excited to close the main switch. , The closing circuit that shuts off the energization of the closing electromagnetic coil by the current flowing by this closing, and the reset switch of the control switch and the opening exciting coil are conducted by operating by the passing current when the main switch is closed The control switch opens the main switch when the power supply is connected to the reset terminal.
In a latch-type relay circuit including a relay, a charging unit that is charged by a power source, and a second relay that causes a current to flow from the charging unit when the power source is cut off to excite an opening exciting coil and open a main switch. A latch-type relay circuit characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31226494A JP3719527B2 (en) | 1994-12-16 | 1994-12-16 | Latch type relay circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31226494A JP3719527B2 (en) | 1994-12-16 | 1994-12-16 | Latch type relay circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08171845A true JPH08171845A (en) | 1996-07-02 |
| JP3719527B2 JP3719527B2 (en) | 2005-11-24 |
Family
ID=18027154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31226494A Expired - Fee Related JP3719527B2 (en) | 1994-12-16 | 1994-12-16 | Latch type relay circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3719527B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108111152A (en) * | 2018-02-23 | 2018-06-01 | 安徽安凯汽车股份有限公司 | A kind of bus occupant gate test automatic switching circuit |
-
1994
- 1994-12-16 JP JP31226494A patent/JP3719527B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108111152A (en) * | 2018-02-23 | 2018-06-01 | 安徽安凯汽车股份有限公司 | A kind of bus occupant gate test automatic switching circuit |
| CN108111152B (en) * | 2018-02-23 | 2023-10-13 | 安徽安凯汽车股份有限公司 | Automatic switching circuit for passenger door test of passenger car |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3719527B2 (en) | 2005-11-24 |
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