JP2000173429A - Relay driving method and circuit - Google Patents
Relay driving method and circuitInfo
- Publication number
- JP2000173429A JP2000173429A JP34684998A JP34684998A JP2000173429A JP 2000173429 A JP2000173429 A JP 2000173429A JP 34684998 A JP34684998 A JP 34684998A JP 34684998 A JP34684998 A JP 34684998A JP 2000173429 A JP2000173429 A JP 2000173429A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- coil
- contact
- power supply
- turned
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リレー駆動方法及
び回路に関し、特に、電源を通電してリレーの接点をオ
ン後は、電源よりも低い電圧をコイルに給電して接点の
オン状態を維持すると共に、リレーの発熱を抑え、リレ
ーの信頼性及び寿命を向上させるための新規な改良に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a circuit for driving a relay, and more particularly to, after energizing a power supply to turn on a contact point of a relay, supplying a voltage lower than the power supply to a coil to maintain an on state of the contact point. The present invention also relates to a novel improvement for suppressing the heat generation of the relay and improving the reliability and life of the relay.
【０００２】[0002]
【従来の技術】従来、用いられていたこの種のリレー駆
動方法としては、例えば、図２に示される構成が採用さ
れていた。すなわち、図２において符号１で示されるも
のはリレーであり、このリレー１は、ノーマルオープン
接点ＮＯとノーマルクローズ接点ＮＣとからなる接点２
と、この接点２をオン・オフするためのコイル３とから
構成されている。2. Description of the Related Art Conventionally, as a relay driving method of this kind, for example, a configuration shown in FIG. 2 has been adopted. That is, what is indicated by reference numeral 1 in FIG. 2 is a relay, and this relay 1 is a contact 2 composed of a normally open contact NO and a normally closed contact NC.
And a coil 3 for turning on and off the contact 2.
【０００３】前記接点２及びコイル３の一端３ａは２８
Ｖの電源４に接続され、このコイル３の他端３ｂは電源
スイッチ５を介してアース６に接続されている。従っ
て、電源スイッチ５をオンとすると、２８Ｖの電源４が
コイル３に通電されて、接点２のノーマルクローズ接点
ＮＣがオンとなり、負荷側に電源４が給電され、接点２
をオンとして継続する場合は、コイル３に電源４の給電
を継続させていた。The one end 3a of the contact 2 and the coil 3 is 28
The other end 3 b of the coil 3 is connected to a ground 6 via a power switch 5. Therefore, when the power switch 5 is turned on, the power supply 4 of 28 V is energized to the coil 3, the normally closed contact NC of the contact 2 is turned on, the power supply 4 is supplied to the load side, and the contact 2
When the power supply 4 is turned on, the power supply from the power supply 4 to the coil 3 is continued.
【０００４】[0004]
【発明が解決しようとする課題】従来のリレー駆動方法
は、以上のように構成されていたため、次のような課題
が存在していた。すなわち、接点のオンを継続するため
には、コイルに対して電源を給電し続けなければなら
ず、コイルの発熱によるリレーの劣化が激しく、リレー
自体の寿命が短くなることになっていた。Since the conventional relay driving method is configured as described above, there are the following problems. That is, in order to keep the contacts turned on, power must be continuously supplied to the coil, and the heat generated by the coil causes severe deterioration of the relay, shortening the life of the relay itself.
【０００５】本発明は、以上のような課題を解決するた
めになされたもので、特に、電源を通電してリレーの接
点をオン後は、電源よりも低い電圧をコイルに給電して
接点のオン状態を維持すると共に、リレーの発熱を抑
え、リレーの信頼性及び寿命を向上させるようにしたリ
レー駆動方法及び回路を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, after the power is turned on to turn on the contacts of the relay, a voltage lower than the power is supplied to the coil, and the contacts are turned off. An object of the present invention is to provide a relay driving method and a circuit that maintain an ON state, suppress heat generation of a relay, and improve reliability and life of the relay.
【０００６】[0006]
【課題を解決するための手段】本発明によるリレー駆動
方法は、電源スイッチオン後にリレーのコイルに電源を
通電し、前記リレーの接点をオンとし、前記接点に接続
された負荷に給電するようにしたリレー駆動方法におい
て、前記接点オン後は、前記コイルに印加する電圧を前
記接点オン時よりも低いレベルでかつ前記接点オン状態
を維持できるレベルに変える方法であり、また、本発明
によるリレー駆動回路は、電源スイッチオン後にリレー
のコイルに電源を通電し、前記リレーの接点をオンと
し、前記接点に接続された負荷に給電するようにしたリ
レー駆動回路において、前記電源スイッチ、電源及びコ
イルに接続されたスイッチングトランジスタと、前記電
源とコイル間に接続された抵抗とを備え、前記リレーオ
ン後は前記抵抗を介して前記コイルに対して前記電源よ
りも低いレベルの電圧を供給して前記接点のオン状態を
維持する構成である。SUMMARY OF THE INVENTION A relay driving method according to the present invention is such that power is supplied to a coil of a relay after a power switch is turned on, a contact of the relay is turned on, and power is supplied to a load connected to the contact. The relay drive method according to the present invention, wherein after the contact is turned on, the voltage applied to the coil is changed to a level lower than when the contact is turned on and to a level at which the contact on state can be maintained. The circuit is such that after the power switch is turned on, power is supplied to the coil of the relay, the contact of the relay is turned on, and the relay drive circuit is configured to supply power to the load connected to the contact. A switching transistor connected thereto, and a resistor connected between the power supply and the coil. Is configured to maintain the on state of the contact by supplying a low level voltage than the power supply to the coil Te.
【０００７】[0007]
【発明の実施の形態】以下、図面と共に本発明によるリ
レー駆動方法及び回路の好適な実施の形態について説明
する。なお、従来例と同一又は同等部分には同一符号を
付して説明する。図１において符号１で示されるものは
リレーであり、このリレー１は、ノーマルオープン接点
ＮＯとノーマルクローズ接点ＮＣとからなる接点２と、
この接点２をオン・オフするためのコイル３とから構成
されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a relay driving method and circuit according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals. In FIG. 1, a relay indicated by reference numeral 1 is a relay, and the relay 1 includes a contact 2 including a normally open contact NO and a normally closed contact NC,
And a coil 3 for turning on and off the contact 2.
【０００８】前記接点２のコモン端子１０には、２８Ｖ
の電源４が接続され、この電源４及びノーマルオープン
接点ＮＯにはＦＥＴトランジスタからなるスイッチング
トランジスタ１１が接続され、このスイッチングトラン
ジスタ１１のソースＳにはコイル３の一端３ａが接続さ
れると共に、この一端３ａと電源４及びドレインＤとの
間には３９０Ωの抵抗１２が接続されている。The common terminal 10 of the contact 2 has a voltage of 28 V
The power supply 4 is connected to the power supply 4 and the normally open contact NO. A switching transistor 11 composed of an FET transistor is connected to the power supply 4 and the source S of the switching transistor 11 is connected to one end 3 a of the coil 3. A resistor 390 of 390Ω is connected between 3a, the power supply 4 and the drain D.
【０００９】前記コイル３にはダイオード１３が並列に
設けられ、このコイル３の他端３ｂとゲートＧには、ダ
イオード１４を介してアース６との間に電源スイッチ５
が接続されている。A diode 13 is provided in parallel with the coil 3. A power switch 5 is provided between the other end 3b of the coil 3 and the gate G between the coil 3 and the earth 6 via a diode 14.
Is connected.
【００１０】次に、動作について述べる。まず、図１の
状態で、電源スイッチ５をオンとすると、スイッチング
トランジスタ１１のゲートＧにゲート電圧ＶGが印加さ
れ、ソースＳにソース電流ＩSが約１００ｍＡ流れ、コ
イル３に２８Ｖの電源４が給電されて接点２がＮＯから
ＮＣに切換わってリレー１がオンとなり、負荷（図示せ
ず）に２８Ｖの電源４が供給される。Next, the operation will be described. First, in the state of FIG. 1, when the power switch 5 turned on, the switching gate voltage V G to the gate G of the transistor 11 is applied, the source current I S to the source S of about 100mA flows, 28V power supply 4 of the coil 3 Is supplied, the contact 2 switches from NO to NC, the relay 1 is turned on, and a 28 V power supply 4 is supplied to a load (not shown).
【００１１】前記コイル３に給電されると同時に、電源
電圧が低下するためスイッチングトランジスタ１１はス
レッショルド以下となってオフとなり、コイル３への給
電がオフとなるところであるが、電源４とコイル３の一
端３ａとの間には３９０Ωの抵抗が入っているため、電
源４の２８Ｖが降下されて約１２Ｖとなってコイル３に
給電され続ける。この１２Ｖの給電により、接点２はオ
ンが継続され続けることとなり、接点２がオンされた時
の電圧レベルよりもはるかに低い電圧レベルでコイル３
が給電される。従って、リレー１がオンされる時の電圧
（２８Ｖ）よりもはるかに低い電圧（１２Ｖ）でリレー
１のオンが継続されるため、長時間のオン状態が継続し
てもコイル３の発熱が少なく、リレー１の長寿命を計る
ことができる。At the same time as power is supplied to the coil 3, the power supply voltage is reduced, so that the switching transistor 11 becomes lower than the threshold and is turned off, so that the power supply to the coil 3 is turned off. Since a resistance of 390Ω is inserted between the terminal 3a and the one end 3a, the voltage of 28V of the power supply 4 is reduced to about 12V, and the coil 3 is continuously supplied with power. With this 12V power supply, the contact 2 is kept on and the coil 3 is turned on at a voltage level much lower than the voltage level when the contact 2 is turned on.
Is fed. Therefore, since the relay 1 is continuously turned on at a voltage (12 V) which is much lower than the voltage (28 V) when the relay 1 is turned on, even if the ON state continues for a long time, the heat generation of the coil 3 is small. Therefore, the long life of the relay 1 can be measured.
【００１２】[0012]
【発明の効果】本発明によるリレー駆動方法及び回路
は、以上のように構成されているため、次のような効果
を得ることができる。すなわち、コイルへの通電にスイ
ッチングトランジスタを用いて通電制御すると共に、ス
イッチングトランジスタオフ後は、抵抗を介してコイル
に通電し、リレーオン後はこのリレーがオンを維持でき
る最低レベルの電圧をコイルに通電してオンを継続する
ため、コイルの発熱が少なく、リレーの劣化を防止して
長寿命化を達成することができる。Since the relay driving method and circuit according to the present invention are configured as described above, the following effects can be obtained. That is, energization of the coil is controlled by using a switching transistor, and after the switching transistor is turned off, the coil is energized via a resistor.After the relay is turned on, the lowest level voltage at which the relay can be kept on is energized to the coil. As a result, the heat generation of the coil is small, the deterioration of the relay can be prevented, and the service life can be extended.
【図１】本発明によるリレー駆動方法を適用した回路を
示す回路図である。FIG. 1 is a circuit diagram showing a circuit to which a relay driving method according to the present invention is applied.
【図２】従来のリレー駆動方法を示す回路図である。FIG. 2 is a circuit diagram showing a conventional relay driving method.
１ リレー ２ 接点 ３ コイル ４ 電源 ５ 電源スイッチ １１ スイッチングトランジスタ １２ 抵抗 DESCRIPTION OF SYMBOLS 1 Relay 2 Contact 3 Coil 4 Power supply 5 Power switch 11 Switching transistor 12 Resistance
Claims (2)
イル(3)に電源(4)を通電し、前記リレー(1)の接点(2)を
オンとし、前記接点(2)に接続された負荷に給電するよ
うにしたリレー駆動方法において、前記接点(2)オン後
は、前記コイル(3)に印加する電圧を前記接点(2)オン時
よりも低いレベルでかつ前記接点(2)オン状態を維持で
きるレベルに変えることを特徴とするリレー駆動方法。After the power switch (5) is turned on, the power (4) is supplied to the coil (3) of the relay (1), the contact (2) of the relay (1) is turned on, and the contact (2) is turned on. In the relay driving method in which power is supplied to a connected load, after the contact (2) is turned on, a voltage applied to the coil (3) is at a lower level than when the contact (2) is turned on and the contact ( 2) A relay driving method characterized by changing the ON state to a level that can be maintained.
イル(3)に電源(4)を通電し、前記リレー(1)の接点(2)を
オンとし、前記接点(2)に接続された負荷に給電するよ
うにしたリレー駆動回路において、前記電源スイッチ
(5)、電源(4)及びコイル(3)に接続されたスイッチング
トランジスタ(11)と、前記電源(4)とコイル(3)間に接続
された抵抗(12)とを備え、前記リレー(1)オン後は前記
抵抗(12)を介して前記コイル(3)に対して前記電源(4)よ
りも低いレベルの電圧を供給して前記接点(2)のオン状
態を維持する構成としたことを特徴とするリレー駆動回
路。2. After the power switch (5) is turned on, the power (4) is supplied to the coil (3) of the relay (1), the contact (2) of the relay (1) is turned on, and the contact (2) is turned on. In a relay drive circuit adapted to supply power to a connected load, the power switch
(5), a switching transistor (11) connected to a power supply (4) and a coil (3), and a resistor (12) connected between the power supply (4) and the coil (3), the relay ( 1) After turning on, the contact (2) is kept on by supplying a voltage of a lower level than the power supply (4) to the coil (3) via the resistor (12). A relay drive circuit characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34684998A JP4127578B2 (en) | 1998-12-07 | 1998-12-07 | Relay driving method and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34684998A JP4127578B2 (en) | 1998-12-07 | 1998-12-07 | Relay driving method and circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000173429A true JP2000173429A (en) | 2000-06-23 |
| JP4127578B2 JP4127578B2 (en) | 2008-07-30 |
Family
ID=18386230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34684998A Expired - Fee Related JP4127578B2 (en) | 1998-12-07 | 1998-12-07 | Relay driving method and circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4127578B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006201767B2 (en) * | 2005-05-03 | 2010-05-20 | Carel S.P.A. | Method for supplying electric power for actuators, such as relays, contactors and the like, of an electronic controller |
| JP2012519356A (en) * | 2009-02-26 | 2012-08-23 | レイセオン カンパニー | + 28V aircraft transient voltage suppression |
-
1998
- 1998-12-07 JP JP34684998A patent/JP4127578B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006201767B2 (en) * | 2005-05-03 | 2010-05-20 | Carel S.P.A. | Method for supplying electric power for actuators, such as relays, contactors and the like, of an electronic controller |
| JP2012519356A (en) * | 2009-02-26 | 2012-08-23 | レイセオン カンパニー | + 28V aircraft transient voltage suppression |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4127578B2 (en) | 2008-07-30 |
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