JPH02312127A - Relay circuit - Google Patents
Relay circuitInfo
- Publication number
- JPH02312127A JPH02312127A JP13314089A JP13314089A JPH02312127A JP H02312127 A JPH02312127 A JP H02312127A JP 13314089 A JP13314089 A JP 13314089A JP 13314089 A JP13314089 A JP 13314089A JP H02312127 A JPH02312127 A JP H02312127A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- transistor
- drive circuit
- base
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 4
- 230000001052 transient effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Relay Circuits (AREA)
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はリレーとその駆動回路とを有するリレー回路に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a relay circuit having a relay and its driving circuit.
従来、この種のリレー回路では、電源投入の過渡状態に
リレー駆動回路が瞬間的に動作して、リ 。Conventionally, in this type of relay circuit, the relay drive circuit operates instantaneously during the power-on transient state, causing the relay to fail.
レーの駆動に必要な信号を自動的に出力する構成になっ
ていた。It was configured to automatically output the signals necessary to drive the laser.
上述した従来のリレー回路は、電源投入の過渡状態にリ
レー駆動回路が瞬間的に動作して、リレーの駆動に必要
な信号を自動的に出力する構成になっているので、リレ
ーが瞬間的に誤動作するという欠点がある。The conventional relay circuit described above is configured such that the relay drive circuit operates instantaneously during the power-on transient state and automatically outputs the signal necessary to drive the relay. It has the disadvantage of malfunctioning.
本発明のリレー回路は、リレーと、このリレーの駆動回
路とを有するリレー回路において、前記リレーの駆動巻
線にコレクタを前記駆動回路の出力端子にエミッタを接
続するトランジスタと、このトランジスタのベースと地
気間に接続されたコンデンサと、前記トランジスタのベ
ースと前記リレーを駆動するための電圧を供給する電源
端子との間に接続された抵抗器とを有している。A relay circuit of the present invention includes a relay and a drive circuit for the relay, including a transistor whose collector is connected to the drive winding of the relay and whose emitter is connected to the output terminal of the drive circuit, and a base of the transistor. The relay includes a capacitor connected to the ground, and a resistor connected between the base of the transistor and a power supply terminal that supplies voltage for driving the relay.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
第１図において、本実施例はリレー２と、リレー２を駆
動する駆動回路１と、リレー２の駆動巻線にコレクタを
駆動回路１の出力端子にエミッタを接続するトランジス
タ３と、トランジスタ３のベースと地気間に接続された
コンデンサ４と、トランジスタ３のベースとリレー２を
駆動するための電圧（＋■）を供給する電源端子７との
間に接続された抵抗器５とを有して構成している。In FIG. 1, this embodiment includes a relay 2, a drive circuit 1 that drives the relay 2, a transistor 3 whose collector is connected to the drive winding of the relay 2, and whose emitter is connected to the output terminal of the drive circuit 1; It has a capacitor 4 connected between the base and the ground, and a resistor 5 connected between the base of the transistor 3 and a power supply terminal 7 that supplies voltage (+■) for driving the relay 2. It is composed of
次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
通常使用状態では抵抗器５によってトランジスタ３のベ
ースに正の電圧が加えられているので、トランジスタ３
はオンの状態となっている。したがって、駆動回路１の
入力端子６に駆動信号が入力され、駆動回路１の出力端
子が地気電位になれば、リレー２には所定の駆動電流が
流れて動作状態となる。In normal use, a positive voltage is applied to the base of transistor 3 by resistor 5, so transistor 3
is in the on state. Therefore, when a drive signal is input to the input terminal 6 of the drive circuit 1 and the output terminal of the drive circuit 1 becomes the earth's potential, a predetermined drive current flows through the relay 2, and the relay 2 becomes operational.
しかし、電源がオフの状態からオンになるような過渡的
な状態においてはトランジスタ３のベースは、コンデン
サ４と抵抗器５の充電特性により、一定期間だけ地気電
位に近い電圧となり、トランジスタ３は一定期間オフの
状態を保っている。したがって、駆動回路１が、電源投
入時に一時的に地気電位を出力しても、その地気電位出
力期間を超える期間だけトランジスタ３がオフになるよ
うに抵抗器５とコンデンサ４の時定数を選んでおくこと
により、電源投入時のリレー２の誤動作を防止すること
ができる。However, in a transient state such as when the power is turned on from off, the base of transistor 3 remains at a voltage close to earth potential for a certain period of time due to the charging characteristics of capacitor 4 and resistor 5, and transistor 3 It stays off for a certain period of time. Therefore, even if the drive circuit 1 temporarily outputs the ground potential when the power is turned on, the time constants of the resistor 5 and the capacitor 4 are set so that the transistor 3 is turned off only for a period that exceeds the ground potential output period. By selecting this, it is possible to prevent the relay 2 from malfunctioning when the power is turned on.
以上説明したように本発明は、リレーとリレー駆動回路
の出力端子との間にトランジスタのコレクターエミッタ
を接続し、ベースにコンデンサと抵抗器とによる時定数
回を接続することにより、電源投入時にトランジスタを
時定数で定まる一定期間オフ状態にするので、電源投入
時にリレー駆動回路の出力端子より一時的に地気電位が
出力される場合でも、リレーの誤動作を防止できるとい
う効果がある。As explained above, the present invention connects the collector emitter of the transistor between the relay and the output terminal of the relay drive circuit, and connects the time constant of the capacitor and resistor to the base, so that when the power is turned on, the transistor Since the circuit is turned off for a certain period of time determined by a time constant, it is possible to prevent malfunction of the relay even if the earth's potential is temporarily output from the output terminal of the relay drive circuit when the power is turned on.
図面の簡単な説明 第１図は本発明の一実施例を示す回路図である。Brief description of the drawing FIG. 1 is a circuit diagram showing an embodiment of the present invention.
１・・・駆動回路、２・・・リレー、３・・・トランジ
スタ、４・・・コンデンサ、５・・・抵抗器、６・・・
入力端子、７・・・電源端子。DESCRIPTION OF SYMBOLS 1... Drive circuit, 2... Relay, 3... Transistor, 4... Capacitor, 5... Resistor, 6...
Input terminal, 7...Power terminal.
Claims (1)
において、前記リレーの駆動巻線にコレクタを前記駆動
回路の出力端子にエミッタを接続するトランジスタと、
このトランジスタのベースと地気間に接続されたコンデ
ンサと、前記トランジスタのベースと前記リレーを駆動
するための電圧を供給する電源端子との間に接続された
抵抗器とを有して成ることを特徴とするリレー回路。In a relay circuit having a relay and a drive circuit for the relay, a transistor having a collector connected to a drive winding of the relay and an emitter connected to an output terminal of the drive circuit;
A capacitor connected between the base of the transistor and the ground, and a resistor connected between the base of the transistor and a power supply terminal that supplies voltage for driving the relay. Characteristic relay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13314089A JPH02312127A (en) | 1989-05-26 | 1989-05-26 | Relay circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13314089A JPH02312127A (en) | 1989-05-26 | 1989-05-26 | Relay circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02312127A true JPH02312127A (en) | 1990-12-27 |
Family
ID=15097684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13314089A Pending JPH02312127A (en) | 1989-05-26 | 1989-05-26 | Relay circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02312127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100469369B1 (en) * | 2002-05-02 | 2005-02-02 | 엘지산전 주식회사 | An Unit for Capacitor Switching |
-
1989
- 1989-05-26 JP JP13314089A patent/JPH02312127A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100469369B1 (en) * | 2002-05-02 | 2005-02-02 | 엘지산전 주식회사 | An Unit for Capacitor Switching |
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