JP2689578B2 - Relay drive - Google Patents
Relay driveInfo
- Publication number
- JP2689578B2 JP2689578B2 JP6703689A JP6703689A JP2689578B2 JP 2689578 B2 JP2689578 B2 JP 2689578B2 JP 6703689 A JP6703689 A JP 6703689A JP 6703689 A JP6703689 A JP 6703689A JP 2689578 B2 JP2689578 B2 JP 2689578B2
- Authority
- JP
- Japan
- Prior art keywords
- relay
- transistor
- voltage
- current
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、リレー駆動装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay drive device.
従来の技術 従来のリレー駆動装置は、第２図のような構成となっ
ていた。すなわち、１は交流電源、２は変圧器2a,整流
スタック2b,コンデンサ2cにより構成した直流電源、３
はリレー、４はリレー３を制御するトランジスタ、5,6
は抵抗、７はオンオフ信号を出力する制御回路、８は電
子回路（例えばLED表示回路）で構成した負荷回路、９
は制御回路７と負荷回路８の電源となる定電圧電源で、
トランジスタ9a,抵抗9b,定電圧ダイオード9cにより構成
している。制御回路７が抵抗６を介してトランジスタ４
のベースにオン信号を出力するとトランジスタ４はオン
し、リレー３を駆動していた。2. Description of the Related Art A conventional relay drive device has a structure as shown in FIG. That is, 1 is an AC power supply, 2 is a DC power supply composed of a transformer 2a, a rectifying stack 2b, and a capacitor 2c, 3
Is a relay, 4 is a transistor for controlling the relay 3, 5 and 6
Is a resistor, 7 is a control circuit that outputs an on / off signal, 8 is a load circuit composed of an electronic circuit (for example, an LED display circuit), and 9 is a load circuit.
Is a constant voltage power source that is a power source for the control circuit 7 and the load circuit 8,
It is composed of a transistor 9a, a resistor 9b, and a constant voltage diode 9c. The control circuit 7 connects the transistor 4 via the resistor 6
When the ON signal was output to the base of the transistor, the transistor 4 was turned on and the relay 3 was driven.
発明が解決しようとする課題 しかしながら、このような従来の構成では、交流電源
１の電圧変動，負荷回路８の電流変動により、直流電源
２の出力電圧は変動し、一方リレー３の感動電圧はリレ
ー３のコイル抵抗の変化分だけ変動する（リレー３はコ
イルのアンペア×ターン数が一定値になると動作するの
で電流は一定となり、コイル抵抗の変化分が感動電圧の
変化となる）ので、コイル抵抗の温度特性により−10℃
〜＋115℃の範囲だと、20℃と比べて約0.9〜1.4倍変化
する。さらにコイル抵抗のばらつきを考慮する（±10
％）とリレー３の感動電圧は0.8〜1.5倍変動することに
なり、リレー３のコイル抵抗が20℃の約1.5倍で、しか
も交流電源１の電圧が低く、負荷回路９の電流が多いと
きにもリレー３が動作する電圧に直流電源２の出力電圧
を設定すると、リレー３のコイル抵抗が20℃の約0.8倍
で、交流電源１の電圧が高いときには、リレー３の印加
電圧が高くなり、リレー３の温度が高くなる。変圧器2a
の出力電流が大きいので、容量の変圧器が必要である等
の課題があった。However, in such a conventional configuration, the output voltage of the DC power supply 2 fluctuates due to the voltage fluctuations of the AC power supply 1 and the current fluctuations of the load circuit 8, while the impression voltage of the relay 3 is the relay. 3 changes due to the change in the coil resistance (the relay 3 operates when the coil ampere x the number of turns becomes a constant value, so the current becomes constant, and the change in the coil resistance causes the change in the sensing voltage). -10 ℃ depending on the temperature characteristics of
Within the range of + 115 ℃, it changes about 0.9 to 1.4 times compared with 20 ℃. Furthermore, consider variations in coil resistance (± 10
%) And the moving voltage of the relay 3 fluctuate by 0.8 to 1.5 times, when the coil resistance of the relay 3 is about 1.5 times 20 ° C., the voltage of the AC power supply 1 is low, and the current of the load circuit 9 is large. When the output voltage of the DC power supply 2 is set to the voltage at which the relay 3 operates, the coil resistance of the relay 3 is about 0.8 times 20 ° C, and when the voltage of the AC power supply 1 is high, the applied voltage of the relay 3 becomes high. , The temperature of the relay 3 becomes high. Transformer 2a
Since there is a large output current, there was a problem such as the need for a capacity transformer.
本発明はこのような課題を解決したリレー駆動装置を
提供することを目的とするものである。It is an object of the present invention to provide a relay drive device that solves such problems.
課題を解決するための手段 上記課題を解決するために、本発明のリレー駆動装置
は、トランジスタのエミッタに抵抗とコンデンサの並列
回路を接続し、この並列回路の他端とトランジスタのベ
ースに定電圧素子を接続し、このトランジスタのコレク
タでリレーを駆動するようにしたものである。Means for Solving the Problems In order to solve the above problems, a relay drive device of the present invention is configured such that a parallel circuit of a resistor and a capacitor is connected to an emitter of a transistor, and a constant voltage is applied to the other end of the parallel circuit and the base of the transistor. The element is connected and the collector of this transistor drives the relay.
作用 本発明のリレー駆動装置は、上記構成としているた
め、リレーが動作するまでの所定時間は直流電源の出力
電圧がリレーコイルに印加されるが、動作した後はトラ
ンジスタが定電流動作となり、リレーのコイル抵抗値に
関係なくリレーには定電流が印加されるので、直流電源
の出力電圧が変化してもリレーには一定の電流が流れ、
リレーのコイルの発熱が少なく、変圧器の出力電流も少
なくてよい。Action Since the relay drive device of the present invention is configured as described above, the output voltage of the DC power supply is applied to the relay coil for a predetermined time until the relay operates, but after the operation, the transistor becomes a constant current operation, and the relay operates. Since a constant current is applied to the relay regardless of the coil resistance value of, even if the output voltage of the DC power supply changes, a constant current flows in the relay,
The relay coil generates less heat, and the output current of the transformer may be less.
実 施 例 以下、本発明の一実施例を第１図にもとづいて説明す
る。第１図において、10はコンデンサ、11は抵抗、12は
定電圧素子で、その他の構成は従来例で示した第２図の
構成と同一であり、同一番号を付している。Embodiment An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 10 is a capacitor, 11 is a resistor, 12 is a constant voltage element, and other configurations are the same as those of the conventional example shown in FIG.
次に上記実施例の構成における動作を説明する。トラ
ンジスタ４のベースとエミッタ間の電圧をVBE,抵抗11の
抵抗値をR11,定電圧素子12の電圧をVZとすると、制御回
路７が抵抗６にオン信号を出力すると、トランジスタ４
がオンし、リレー３の両端には直流電源２の出力電圧が
印加される。一方、コンデンサ10が充電されると抵抗11
には（VZ−VBE）/R11の電流が流れ、トランジスタ４のh
FEが充分に大きいと仮定すると、リレー３のコイル12は
コイル抵抗に関係なく（VZ−VBE）/R11の電流が流れ
る。ここで、コンデンサ10の充電時間がリレー３の動作
時間よりも長くなるようにコンデンサ10の容量を設定
し、リレー３が動作した後保持できるだけの保持電流が
リレー３のコイルに流れるように、定電圧素子12の電圧
VZと抵抗11の抵抗値R11を設定すれば、リレー３が動作
した後はリレー３のコイルには保持電流（一般には感動
電流の数分の一程度）が流れるだけなので、リレー３の
コイルに流れる電流を最小限に抑えることができる。な
お、リレー３が動作するまでの電流を直流電源２のコン
デンサ2cから供給できるようにコンデンサ2cの容量を設
定しておけば、変圧器2aの電流能力をさらに低減するこ
とができる。Next, the operation of the configuration of the above embodiment will be described. When the voltage between the base and the emitter of the transistor 4 is V BE , the resistance value of the resistor 11 is R11, and the voltage of the constant voltage element 12 is V Z , when the control circuit 7 outputs an ON signal to the resistor 6, the transistor 4
Is turned on, and the output voltage of the DC power supply 2 is applied to both ends of the relay 3. On the other hand, when the capacitor 10 is charged, the resistance 11
Current of (V Z −V BE ) / R11 flows through the
When FE is assumed sufficiently large, the coil 12 of the relay 3, regardless of the coil resistance (V Z -V BE) / R11 current flows. Here, the capacitance of the capacitor 10 is set so that the charging time of the capacitor 10 is longer than the operating time of the relay 3, and a constant current is maintained in the coil of the relay 3 so that the holding current that can be maintained after the relay 3 operates. Voltage of voltage element 12
If V Z and the resistance value R11 of the resistor 11 are set, the holding current (generally about a fraction of the moving current) flows in the coil of the relay 3 after the relay 3 operates, so the coil of the relay 3 It is possible to minimize the electric current flowing through. If the capacity of the capacitor 2c is set so that the current until the relay 3 operates can be supplied from the capacitor 2c of the DC power supply 2, the current capacity of the transformer 2a can be further reduced.
発明の効果 上記実施例の説明から明らかなように本発明は、リレ
ーが動作した後はリレーコイルには保持するのに必要な
電流しか流さないため、交流電源の電圧変動，負荷回路
の電流変動により直流電源の出力電圧が変動しても、温
度変化，ばらつきによりリレーのコイル抵抗値が変化し
ても、リレーコイルには常に一定の電流が流れるので、
リレーのコイルの発熱が少なく、また、直流電源の出力
電流も少ないので変圧器が小型で低コストにできるもの
である。EFFECTS OF THE INVENTION As is clear from the description of the above embodiments, the present invention allows only the current necessary for holding the relay coil to flow after the relay operates, so the voltage fluctuation of the AC power supply and the current fluctuation of the load circuit are caused. Therefore, even if the output voltage of the DC power supply fluctuates, even if the coil resistance of the relay changes due to temperature changes and variations, a constant current always flows in the relay coil.
Since the relay coil generates little heat and the output current of the DC power source is small, the transformer can be made small and the cost can be reduced.
第１図は本発明の一実施例を示すリレー駆動装置の回路
図、第２図は従来のリレー駆動装置の回路図である。 ２……直流電源、３……リレー、４……トランジスタ、
６……抵抗、７……制御回路、10……コンデンサ、11…
…抵抗、12……定電圧素子。FIG. 1 is a circuit diagram of a relay drive device showing an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional relay drive device. 2 ... DC power supply, 3 ... Relay, 4 ... Transistor,
6 ... Resistance, 7 ... Control circuit, 10 ... Capacitor, 11 ...
... resistor, 12 ... constant voltage element.
Claims (1)
接続し、抵抗とコンデンサの並列回路の一端をトランジ
スタのエミッタに接続し、リレーの他端と抵抗とコンデ
ンサの並列回路の他端を直流電源に接続し、抵抗とコン
デンサの並列回路の他端とトランジスタのベースに定電
圧素子を接続し、トランジスタのベースに抵抗を介して
オンオフ信号を出力する制御回路を接続して構成したリ
レー駆動装置。1. A relay is connected to a collector of a transistor, one end of a parallel circuit of a resistor and a capacitor is connected to an emitter of a transistor, and the other end of the relay and the other end of a parallel circuit of a resistor and a capacitor are connected to a DC power source. A relay drive device in which a constant voltage element is connected to the other end of the parallel circuit of the resistor and the capacitor and the base of the transistor, and a control circuit that outputs an on / off signal via the resistor is connected to the base of the transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6703689A JP2689578B2 (en) | 1989-03-17 | 1989-03-17 | Relay drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6703689A JP2689578B2 (en) | 1989-03-17 | 1989-03-17 | Relay drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02244532A JPH02244532A (en) | 1990-09-28 |
| JP2689578B2 true JP2689578B2 (en) | 1997-12-10 |
Family
ID=13333237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6703689A Expired - Fee Related JP2689578B2 (en) | 1989-03-17 | 1989-03-17 | Relay drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2689578B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780261B (en) * | 2011-08-09 | 2014-12-31 | 北京佳讯飞鸿电气股份有限公司 | Driving device for railway disaster prevention system and train control system interface relay |
-
1989
- 1989-03-17 JP JP6703689A patent/JP2689578B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02244532A (en) | 1990-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |