JPS6110914A - Relay drive circuit - Google Patents
Relay drive circuitInfo
- Publication number
- JPS6110914A JPS6110914A JP59132662A JP13266284A JPS6110914A JP S6110914 A JPS6110914 A JP S6110914A JP 59132662 A JP59132662 A JP 59132662A JP 13266284 A JP13266284 A JP 13266284A JP S6110914 A JPS6110914 A JP S6110914A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- voltage
- voltage source
- drive circuit
- converter
- 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
Landscapes
- Direct Current Feeding And Distribution (AREA)
- 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】
技術分野
本発明はリレー駆動回路に関し、特にＤＣ−ＤＣコンバ
ータ等に用いられるリレーを用いた突入電流防止回路に
おけるリレー駆動回路の改良に関する。DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a relay drive circuit, and more particularly to an improvement in a relay drive circuit in an inrush current prevention circuit using a relay used in a DC-DC converter or the like.
悌】１１市
ＤＣ−ＤＣコンバータ等に用いられるリレーを用いた突
入電流防止回路としては、第１図に示す如く、電源スィ
ッチ２を介して供給される直流電圧源１の出力電圧であ
るＤＣ−ＤＣコンバータの入力電圧を抵抗器Ｒ１とツェ
ナダイオードＺＤにより分圧してトランジスタＱの制御
電圧を得てこのトランジスタＱを制御し、トランジスタ
Ｑのコレクタ回路に挿入されているリレー３のコイルに
電流を流すことによりリレー３のアーマチア接点４をブ
レーク接点５側からメーク接点６側へ切替え、突入電流
防止回路としての機能を得るものがある。尚、リレー３
にはスパイク防止用のダイオードＤが並列接続され、接
点４と６との間には突入電流制限用抵抗器Ｒ２が接続さ
れている。Ｃ１゜Ｃ２はコンデンサを示す。As shown in FIG. 1, an inrush current prevention circuit using a relay used in a DC-DC converter or the like uses DC-, which is the output voltage of a DC voltage source 1 supplied via a power switch 2, as shown in FIG. The input voltage of the DC converter is divided by the resistor R1 and the Zener diode ZD to obtain the control voltage for the transistor Q, which controls the transistor Q and causes current to flow through the coil of the relay 3 inserted in the collector circuit of the transistor Q. As a result, there is a device that switches the armature contact 4 of the relay 3 from the break contact 5 side to the make contact 6 side to obtain a function as an inrush current prevention circuit. Furthermore, relay 3
A diode D for preventing spikes is connected in parallel with the contact 4, and a rush current limiting resistor R2 is connected between the contacts 4 and 6. C1°C2 represents a capacitor.
かかる回路において、トランジスタＯのバイアス電圧及
びリレー３のコイル駆動電圧が共にＤＣ−ＤＣコンバー
タの入力電圧から供給されているので、この入力電圧の
変動範囲が大なる場合は高入力電圧時に回路の損失が大
きくなる欠点がある。In this circuit, the bias voltage of transistor O and the coil drive voltage of relay 3 are both supplied from the input voltage of the DC-DC converter, so if the fluctuation range of this input voltage is large, circuit loss will occur at high input voltage. The disadvantage is that it becomes large.
λ虱五旦力
本発明は、ＤＣ−ＤＣコンバータの入力電圧が大きく変
化する場合であっても突入電流防止回路の損失が入力電
圧にほとんど依存しないリレー駆動回路を提供すること
を目的としている。An object of the present invention is to provide a relay drive circuit in which the loss of the inrush current prevention circuit hardly depends on the input voltage even when the input voltage of the DC-DC converter changes greatly.
発明の構成
本発明によるリレー駆動回路は、先ず第１の直流電圧源
の出力電圧に応じてリレーを動作させ、しかる後にこの
第１の直流電圧源に基づいて安定化された第２の直流電
圧源の出力電圧によってリレーの動作状態を保持するよ
うにしたことを特徴とする。Structure of the Invention A relay drive circuit according to the present invention first operates a relay according to the output voltage of a first DC voltage source, and then operates a second DC voltage stabilized based on the first DC voltage source. The relay is characterized in that the operating state of the relay is maintained by the output voltage of the power source.
１簾１ 以下、第２図♂つで本発明の詳細な説明する。1 blind 1 The present invention will be explained in detail below with reference to FIG. 2♂.
図において第１図と同等部分は同一符号にて示している
。第１の直流電圧源７をＤＣ−ＤＣコンバータの入力電
圧とし、第２の直流電圧源８をＤＣ−ＤＣ，コンバータ
の安定化された出力電圧とする。ＤＣ−ＤＣコンバータ
の入力電圧が印加された瞬間には、リレー接点はアーマ
チャ接点４とブレーク接点５とが導通しておりもちろん
第２の直流電圧１１ｉ８であるＤＣ−ＤＣコンバータ出
力電圧は発生していない。従って、リレー３のコイルに
は、分圧抵抗Ｒ３とコンデサＣ２との時定数により決定
される時間をかけて分圧抵抗Ｒ３とＲ４との比によって
決まる電圧が第１の直流電圧源すなわちＤ Ｃ−Ｄ Ｃ
コンバータの入力電圧から印加される。リレー３のコイ
ルを流れる電流が最低感動電流を越えると、リレー接点
はアーマチャ接点４とメーク接点６との間が導通する。In the figure, parts equivalent to those in FIG. 1 are designated by the same reference numerals. The first DC voltage source 7 is the input voltage of the DC-DC converter, and the second DC voltage source 8 is the stabilized output voltage of the DC-DC converter. At the moment when the input voltage of the DC-DC converter is applied, the armature contact 4 and break contact 5 of the relay contact are electrically connected, and of course the DC-DC converter output voltage, which is the second DC voltage 11i8, is not generated. do not have. Therefore, the voltage determined by the ratio of the voltage dividing resistors R3 and R4 is applied to the coil of the relay 3 over a period of time determined by the time constant of the voltage dividing resistor R3 and the capacitor C2. -DC
Applied from the converter input voltage. When the current flowing through the coil of the relay 3 exceeds the minimum current, the relay contacts conduct between the armature contact 4 and the make contact 6.
このとき、分圧抵抗Ｒ３を通してリレー３のコイルへの
電圧の印加はなくなるが、リレーは一度動作するとその
動作状態を維持するのには駆動時はど電流を必要としな
いので、リレーが動作状態にある間第２の直流電圧源８
より電圧を供給してリレー３を動作状態に維持可能とな
る。At this time, voltage is no longer applied to the coil of relay 3 through voltage dividing resistor R3, but once the relay operates, it does not require any current to maintain its operating state, so the relay remains in operating state. while the second DC voltage source 8
It becomes possible to maintain the relay 3 in an operating state by supplying more voltage.
この第２の直流電圧源８は前述の如＜Ｄ、Ｃ−ＤＣコン
バータの安定化出力よりとることにすれば、リレー駆動
回路を流れる°電流は入力電圧の変動によらず一定とな
り、よって入力電圧が大となってもリレー駆動回路で消
費される電力は増加しないのである。更に、第２の直流
電圧ｍ８より供給する電流は駆動時の１／２程度で十分
であり、これは電流制限抵抗Ｒ５の値により決定し得る
。従って、この面でも損失を低減し得ることになる。If this second DC voltage source 8 is taken from the stabilized output of the C-DC converter as described above, the current flowing through the relay drive circuit will be constant regardless of fluctuations in the input voltage. Even if the voltage increases, the power consumed by the relay drive circuit does not increase. Further, it is sufficient that the current supplied from the second DC voltage m8 is about half that of driving, and this can be determined by the value of the current limiting resistor R5. Therefore, the loss can be reduced in this aspect as well.
発明の効果
本発明によれば、ＤＣ−ＤＣコンバータの入力電圧が大
きく変化しても突入電流防止回路の損失が入力電圧に依
存することはないので、高い入力電圧となっても損失が
少ないリレー駆動回路が得られる。Effects of the Invention According to the present invention, even if the input voltage of the DC-DC converter changes greatly, the loss of the inrush current prevention circuit does not depend on the input voltage, so a relay with low loss even when the input voltage is high is provided. A driving circuit is obtained.
第１図は従来例を示す回路図、第２図は本発明の実施例
の回路図である。
主要部分の符号の説明
３・・・・・・リレーFIG. 1 is a circuit diagram showing a conventional example, and FIG. 2 is a circuit diagram of an embodiment of the present invention. Explanation of symbols of main parts 3... Relay
Claims (1)
得られた安定化された第２の直流電圧源と、この第２の
直流電圧源にコイルが直列接続されたリレーと、このリ
レーのアーマチャ接点及びブレーク接点を介して前記第
１の直流電圧源と直列接続される時定数回路とを有し、
前記リレーは前記時定数回路の出力電圧によって動作し
しかる後前記第２の直流電圧源の出力電圧によって動作
状態を保持するように構成したことを特徴とするリレー
駆動回路。a first DC voltage source, a stabilized second DC voltage source obtained based on the first DC voltage source, and a relay in which a coil is connected in series to the second DC voltage source; a time constant circuit connected in series with the first DC voltage source via an armature contact and a break contact of the relay;
A relay drive circuit characterized in that the relay is configured to be operated by the output voltage of the time constant circuit and then maintained in an operating state by the output voltage of the second DC voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59132662A JPS6110914A (en) | 1984-06-27 | 1984-06-27 | Relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59132662A JPS6110914A (en) | 1984-06-27 | 1984-06-27 | Relay drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6110914A true JPS6110914A (en) | 1986-01-18 |
Family
ID=15086559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59132662A Pending JPS6110914A (en) | 1984-06-27 | 1984-06-27 | Relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110914A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507734A (en) * | 2017-08-07 | 2017-12-22 | 珠海格力电器股份有限公司 | Relay step-down hold circuit |
-
1984
- 1984-06-27 JP JP59132662A patent/JPS6110914A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507734A (en) * | 2017-08-07 | 2017-12-22 | 珠海格力电器股份有限公司 | Relay step-down hold circuit |
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