JPS5851432A - Relay drive circuit - Google Patents
Relay drive circuitInfo
- Publication number
- JPS5851432A JPS5851432A JP14857281A JP14857281A JPS5851432A JP S5851432 A JPS5851432 A JP S5851432A JP 14857281 A JP14857281 A JP 14857281A JP 14857281 A JP14857281 A JP 14857281A JP S5851432 A JPS5851432 A JP S5851432A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- capacitor
- voltage
- transistor
- resistor
- 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
Landscapes
- Relay Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はリレーをトランジスタにて動作させるリレー駆
動回路に関し、リレーコイルに動作電圧以上の電圧を印
加してリレーを動作させ、リレーが動作した後は、リレ
ーコイルへの印加電圧を動作電圧以下にすることｒよシ
、リレーコイルの温度上昇を抑えるとともに、瞬時停電
が生じてもリレーが安定した動作を行なうようにするこ
とを目的とするものである。以下、本発明の実施例につ
いて添付図面を参照して説明する。[Detailed Description of the Invention] The present invention relates to a relay drive circuit that operates a relay using a transistor.The present invention relates to a relay drive circuit that operates a relay using a transistor.The relay is operated by applying a voltage higher than the operating voltage to the relay coil. The purpose of this is to reduce the applied voltage below the operating voltage, suppress the rise in temperature of the relay coil, and ensure that the relay operates stably even in the event of a momentary power outage. Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図において、１は交流電源、２は電源トランス、３
はダイオードブリッジ、４，６および８はコンデンサ、
６および７は抵抗、９および１２はトランジスタ、１０
は制御回路、１１はリレーである。In Figure 1, 1 is an AC power supply, 2 is a power transformer, and 3
is a diode bridge, 4, 6 and 8 are capacitors,
6 and 7 are resistors, 9 and 12 are transistors, 10
is a control circuit, and 11 is a relay.
次に動作について説明を行なう。交流電源１は電源トラ
ンス２により減圧され、ダイオードブリッジ３により整
流される。そしてコンデンサ４により平滑されて直流と
なる。この電圧をｖｌ とする。又、抵抗７（抵抗値
をＲ７どする）とコンデンサ８（容量を０８とする）に
よりトランジスタ９のエミッタに電圧が発生する。この
電圧をｖ２とする。この電圧は制御回路１０に供給され
、制御回路１ｏの電源となる。ここで、制御回路１゜３
／−・
からトランジスタ１２のベースに電流が供給されていな
い場合、トランジスタ１２のコレクタ電流が流れず、抵
抗６によりコンデンサ６にはｖｌ の電圧が充電される
。一方、制御回路１０あ・らトランジスタ１２のベース
に電流が供給された場合は、トランジスタ１２がＯＮす
る。ここでトランジスタ１２のコレクターエミッタ飽和
電圧でリレー１１のコイルの抵抗値をＲ１１とすれば、
トランジスタ１２がＯＮした後の平衡状態において、リ
レー１１の両端電圧（これをｖ４とする）は
−１１の動作電圧以上に設定し、トランジスタ１２がｏ
Ｎした後リレーの動作時間経過後のリレー１１の両端電
圧ｖ４がリレー１１の動作電圧以上にな圧以上になるよ
うに抵抗６の抵抗値Ｒ６とコンデンサ６の容量Ｃ６を設
定すれば、リレー１１が動作するまではリレー１１には
動作電圧以上が印加持することができる。ところが、制
御回路１０がトランジスタ１２０ペースに電流を供給し
ている状態で、停電等の為交流電源１の電圧が零になれ
ば、■４．ｖ２およびｖ３共に零電圧になるが、交流電
源１の電圧が回復１した場合は、コンデンサ６の電圧が
リレー１１の動作電圧以上になってから、トランジスタ
１２がＯＮにならなければリレーは動作しなくなる（第
２図、但し各波形はＧを基準としている）○これを実現
するには抵抗６とコンデンサ６よシなる時定数Ｒ６ｘＣ
６が抵抗７とコンデンサ８よシなる時定数Ｒ７×０８よ
シも速くなるように設定すれば良い。Next, the operation will be explained. An AC power source 1 is reduced in pressure by a power transformer 2 and rectified by a diode bridge 3. Then, it is smoothed by a capacitor 4 and becomes a direct current. Let this voltage be vl. Further, a voltage is generated at the emitter of the transistor 9 by the resistor 7 (the resistance value is set to R7) and the capacitor 8 (the capacitance is set to 08). Let this voltage be v2. This voltage is supplied to the control circuit 10 and serves as a power source for the control circuit 1o. Here, the control circuit 1゜3
When no current is supplied to the base of the transistor 12 from /-., the collector current of the transistor 12 does not flow, and the capacitor 6 is charged with the voltage vl by the resistor 6. On the other hand, when current is supplied to the bases of the control circuit 10 and the transistor 12, the transistor 12 is turned on. Here, if the resistance value of the coil of relay 11 is R11 at the collector-emitter saturation voltage of transistor 12, then
In the equilibrium state after the transistor 12 is turned on, the voltage across the relay 11 (this is referred to as v4) is set to -11 operating voltage or higher, and the transistor 12 is turned on.
If the resistance value R6 of the resistor 6 and the capacitance C6 of the capacitor 6 are set so that the voltage v4 across the relay 11 after the relay operating time has elapsed is equal to or higher than the operating voltage of the relay 11, the relay 11 Until the relay 11 operates, a voltage equal to or higher than the operating voltage can be applied to the relay 11. However, if the voltage of the AC power supply 1 becomes zero due to a power outage or the like while the control circuit 10 is supplying current to the transistor 120, then 4. Both v2 and v3 become zero voltage, but if the voltage of AC power supply 1 recovers, the relay will not operate unless transistor 12 is turned on after the voltage of capacitor 6 exceeds the operating voltage of relay 11. (Figure 2, however, each waveform is based on G) ○To achieve this, the time constant R6xC, which is equal to the resistor 6 and capacitor 6, is required.
It is sufficient to set the time constant R7×08 which is faster than the resistor 7 and capacitor 8.
以上の説明“から明らかなように、本発明によれば、リ
レーが動作した後はリレーコイルへの印加電圧をリレー
が動作状態を保持できる最低電圧まで下げることができ
るため、リレーコイルの消費。As is clear from the above description, according to the present invention, after the relay operates, the voltage applied to the relay coil can be lowered to the lowest voltage that allows the relay to maintain its operating state, thereby reducing the consumption of the relay coil.
電力が少なくて済み、リレーコイルの温度上昇が抑えら
れ、経済的であるとともにリレーの信頼性か向上し、ま
た、停電の時もリレーが確実に動作６／−
する０It requires less electricity, suppresses the temperature rise of the relay coil, is economical, improves the reliability of the relay, and ensures that the relay operates reliably even during a power outage.
第１図は本発明の一実施例を示すリレー駆動回路の電気
回路図、第２図は同要部の信号波形図である。
４．６．８・・・・・・コンデンサ、５，７・・・・・
・トランジスタ、９．１２・・・・・・トランジスタ、
１０・・・・・・制御回路、１１・・・・・・リレーコ
イル。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
を
第２図FIG. 1 is an electric circuit diagram of a relay drive circuit showing one embodiment of the present invention, and FIG. 2 is a signal waveform diagram of the main parts thereof. 4.6.8...Capacitor, 5,7...
・Transistor, 9.12...Transistor,
10... Control circuit, 11... Relay coil. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2
Claims (1)
コンデンサの直列回路を並列接続し、前記第２のコンデ
ンサの充電電圧により駆動される第１のトランジスタに
制御回路を直列接続し、この制御回路の出力により駆動
される第２のトランジスタにリレーコイルを直列接続し
、この直列回路に第３のコンデンサを並列接続し、この
第３のコンデンサを第２の抵抗を介して電源に接続し、
第１の抵抗と第２のコンデンサによって決定される時定
数を第２の抵抗と第３のコンデンサによって決定される
時定数より大としてなるリレー駆動回路。A series circuit of a first resistor and a second capacitor is connected in parallel to a first capacitor serving as a DC power source, and a control circuit is connected in series to a first transistor driven by the charging voltage of the second capacitor. A relay coil is connected in series to a second transistor driven by the output of this control circuit, a third capacitor is connected in parallel to this series circuit, and this third capacitor is connected to a power supply via a second resistor. death,
A relay drive circuit in which a time constant determined by a first resistor and a second capacitor is larger than a time constant determined by the second resistor and third capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14857281A JPS5851432A (en) | 1981-09-18 | 1981-09-18 | Relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14857281A JPS5851432A (en) | 1981-09-18 | 1981-09-18 | Relay drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5851432A true JPS5851432A (en) | 1983-03-26 |
| JPH0155532B2 JPH0155532B2 (en) | 1989-11-24 |
Family
ID=15455738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14857281A Granted JPS5851432A (en) | 1981-09-18 | 1981-09-18 | Relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5851432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0496800A (en) * | 1990-08-10 | 1992-03-30 | Matsushita Electric Ind Co Ltd | Relay driving device of cordless iron |
-
1981
- 1981-09-18 JP JP14857281A patent/JPS5851432A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0496800A (en) * | 1990-08-10 | 1992-03-30 | Matsushita Electric Ind Co Ltd | Relay driving device of cordless iron |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0155532B2 (en) | 1989-11-24 |
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