CN101714479B - Device for prolonging working life of relay - Google Patents
Device for prolonging working life of relay Download PDFInfo
- Publication number
- CN101714479B CN101714479B CN2009101994583A CN200910199458A CN101714479B CN 101714479 B CN101714479 B CN 101714479B CN 2009101994583 A CN2009101994583 A CN 2009101994583A CN 200910199458 A CN200910199458 A CN 200910199458A CN 101714479 B CN101714479 B CN 101714479B
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- relay
- resistance
- electronic switch
- diode
- control
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Abstract
The invention relates to a method and a device for prolonging the working life of a relay, which belong to the fields of a relay technology, a control component technology and an electronic circuit technology. The method is characterized in that both ends of a control contact of the relay are connected with an electronic switch in parallel, and the electronic switch which is connected with the contact in parallel is switched on before the switching-off moment of the contact; after the contact is switched on, the electronic switch is switched off; and the input end of the electronic switch and the detection end of a control relay coil are both connected on a control loop of the relay in series. The device is formed by connecting a relay, an optical coupling electronic switch, a light emitting diode, a resistor, a two-way diode, a triode, a control voltage end and a relay coil. The invention has the following beneficial effects: because the invention uses the modes of serial connection and parallel connection simultaneously to achieve the aim of controlling the switching-on and the switching-off of the electronic switch and the relay, the formation of electric arcs is prevented, and the damage of the metal contact of the relay is avoided, thereby prolonging the working life of the relay.
Description
Technical field
Belonging to relay technology, control device technology and electronic circuit technology field, exactly is the technology that electronic circuit and relay combine.
Background technology
Relay is a kind of components and parts of commonplace and economic Control current break-make. because relay control break-make is to adopt sheet metal as contact point, can produce electric arc during connecting and disconnecting, so the useful life of relay is shorter comparatively speaking.
In order to overcome the shortcoming more than the relay, a lot of inventions have proposed the generation that method in parallel with relay with semiconductor switch or that connect reduces electric arc.
Most inventions is that in this way, it can make semiconductor switch and relay move the break-make of control circuit simultaneously with the operating part of semiconductor switch conducting of formation in parallel with relay and disconnection.This class circuit has the branch of front and back for the ON time that makes conductor switch and relay, the capital is with electronic type or mechanical type delay circuit, and this has influence on its actual effect and reliability greatly, for example Patent No.4772809, Patent 5053907, Patent 5699218 etc.
Simultaneously, another one patent PCT/US00/13779 is arranged, the patent inventor is Lim Tiong Seng, he connects the coil of relay with the control section of electronic switch, because the toggle speed of semiconductor switch is fast, and highly sensitive in relay, when both are transfused to simultaneously or disconnect control signal, the conducting of relay and electronic switch produces the time difference with disconnection, thereby reduces the generation of electric arc.But this invention also has a shortcoming, when the electric current by coil disconnects, because the energy storage effect of coil, in coil two auspicious generations " reverse bias pressure ", influenced the control section of electronic switch, make its too fast disconnection,, could guarantee that the relay contact point avoids the electric arc generation when disconnection so this invention reaffirms that also it needs the delay circuit based on electric capacity.
Summary of the invention
The invention provides and a kind ofly need not have electronic type or mechanical type delay circuit, also can guarantee a kind of device that prolongs working life of relay that the relay contact point can avoid electric arc to produce when disconnecting or closing.
The technical scheme that the present invention takes is:
A kind of device that prolongs working life of relay, its scheme is: linked and constituted by relay, electronic switch, light-emitting diode, resistance, two-way diode, triode, control voltage end, relay coil.
The invention has the beneficial effects as follows:
Because the mode of operation of control circuit of the present invention has series model and paralleling model concurrently; When line conduction, control with series model: electronic switch is than the first conducting of relay. and when disconnecting, relay and electronic switch but are paralleling models, electronic switch disconnects after than relay. that is to say, the present invention uses the pattern of series, parallel to reach the break-make of control electronic switch and relay simultaneously, when conducting and disconnection, can both avoid the formation of electric arc, can not be subjected to the influence that coil energy storage effect produces " reverse bias voltage " yet.Eliminate the generation of relay metal contact electric arc reliably, avoided the damage of relay metal contact, thereby prolonged the working life of relay.
Description of drawings
Fig. 1, for circuit structure schematic diagram of the present invention.
Embodiment
Now the invention will be further described in conjunction with the accompanying drawings,
A kind of device that prolongs working life of relay, formed by relay and control circuit thereof and electronic switch, its formation is: elementary LED 1 two ends of electronic switch U1 respectively with resistance R 1, resistance R 2 is joined, the Solid Double of U1 level of electronic switch is joined to an end and the resistance R 5 of diode, contact of the end of the other end of resistance R 5 and two-way diode Q2 and relay joins, the Solid Double of U1 level of electronic switch is joined with the control end of two-way diode Q2 and an end of resistance R 6 to the other end of diode, and the other end of the other end of resistance R 6 and two-way diode Q2 and another contact of relay join; The other end of resistance R 2 joins with resistance R 3, resistance R 4, and the emitter of the other end of resistance R 3 and triode Q1 and control voltage B end join; The base stage of resistance R 4 other ends and triode Q1 is joined; The relay coil two ends also meet diode D1, and the collector electrode of the positive termination triode of diode D1 Q1, diode D1 negative terminal connect control voltage A end, and join with the other end of resistance R 1.
Described control voltage side a and b is to be provided by the direct voltage that uses relay, or the direct voltage AB that is formed after through 1 filtering of inductance L 1 capacitor C, diode bridge full-wave rectification, again by capacitor C 2 filtering by alternating current provides.
Described optocoupler electronic switch U1, it is secondary also can be solid-state triode, solid-state switch, solid-state diode, or photoelectricity coupling solid-state switch; Optocoupler electronic switch U1 also can be the electromagnetic coupled switch, as belt coil formula high speed magnetosensitive switch, or the box-like switch in corner.
Described two-way diode Q2 also can be other solid-state switches such as one-way SCR (SCR), bidirectional triode thyristor (TRIAC), MOS fet (MOSFET), IBGT, or electronic switch parts or equipment.
Described triode Q1 also can be a fet (FET), operational amplifier (OperationalAmplifier), comparison amplifier (Comparator), current potential trigger (Schmitt-trigger).Or other have the parts or the assembly of similar functions; Here, similar functions is meant and can drives relay, and its parts and circuit configurations make relay after activating (activated), makes the coil of relay be the parallel A that is connected to indirectly, B Input voltage terminal.
Described resistance R 2, R3, R4 can be a plurality of resistance, electric capacity, diode, Zener diode and other form the electronic unit/assembly of similar functions.Here, similar functions is meant formation as R2, R3, and the LED1 of R4 and optocoupler electronic switch U1 becomes cascaded structure to pick up and surveys the U1LED conduction and startup or activation (activate) Q1.
Claims (2)
1. device that prolongs working life of relay, formed by relay and control circuit thereof and electronic switch, it is characterized in that: elementary LED 1 two ends of electronic switch U1 respectively with resistance R 1, resistance R 2 is joined, the Solid Double of U1 level of electronic switch is joined to an end and the resistance R 5 of diode, contact of the end of the other end of resistance R 5 and two-way diode Q2 and relay joins, the Solid Double of U1 level of electronic switch is joined with the control end of two-way diode Q2 and an end of resistance R 6 to the other end of diode, and the other end of the other end of resistance R 6 and two-way diode Q2 and another contact of relay join; The other end of resistance R 2 joins with resistance R 3, resistance R 4, and the emitter of the other end of resistance R 3 and triode Q1 and control voltage B end join; The base stage of resistance R 4 other ends and triode Q1 is joined; The relay coil two ends also meet diode D1, and the collector electrode of the positive termination triode of diode D1 Q1, diode D1 negative terminal connect control voltage A end, and join with the other end of resistance R 1.
2. a kind of device that prolongs working life of relay according to claim 1, it is characterized in that: described control voltage side a and b is to be provided by the direct voltage that uses relay, or the direct voltage AB that is formed after through 1 filtering of inductance L 1 capacitor C, diode bridge full-wave rectification, again by capacitor C 2 filtering by alternating current provides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101994583A CN101714479B (en) | 2009-11-27 | 2009-11-27 | Device for prolonging working life of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101994583A CN101714479B (en) | 2009-11-27 | 2009-11-27 | Device for prolonging working life of relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101714479A CN101714479A (en) | 2010-05-26 |
| CN101714479B true CN101714479B (en) | 2011-11-30 |
Family
ID=42417988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101994583A Expired - Fee Related CN101714479B (en) | 2009-11-27 | 2009-11-27 | Device for prolonging working life of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101714479B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136380A (en) * | 2011-03-21 | 2011-07-27 | 齐齐哈尔齐力达电子有限公司 | Arc extinction combination switch with rectifier tube |
| CN105097356B (en) * | 2015-07-01 | 2018-03-13 | 华为技术有限公司 | A kind of control method and device |
| CN107749372B (en) * | 2017-11-08 | 2020-11-13 | 北京佳讯飞鸿电气股份有限公司 | Relay control circuit and system |
| DE102018100974B4 (en) * | 2018-01-17 | 2019-09-26 | Phoenix Contact Gmbh & Co. Kg | circuitry |
-
2009
- 2009-11-27 CN CN2009101994583A patent/CN101714479B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101714479A (en) | 2010-05-26 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20151127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |