CN104882332A - Anti-interference circuit of relay - Google Patents
Anti-interference circuit of relay Download PDFInfo
- Publication number
- CN104882332A CN104882332A CN201510309443.3A CN201510309443A CN104882332A CN 104882332 A CN104882332 A CN 104882332A CN 201510309443 A CN201510309443 A CN 201510309443A CN 104882332 A CN104882332 A CN 104882332A
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- CN
- China
- Prior art keywords
- relay
- resistor
- parallel
- circuit
- interference
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/001—Functional circuits, e.g. logic, sequencing, interlocking circuits
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- Control Of Resistance Heating (AREA)
Abstract
Disclosed in the invention is an anti-interference circuit of a relay. The anti-interference circuit comprises a relay element at least having two groups of contacts and a resistor. On the basis of the principle, the resistor is connected in parallel with a relay coil to increase an action current of the relay, thereby absorbing various interferences in a control loop and thus achieving an objective of interference prevention of the relay. The anti-interference circuit is characterized in that one resistor is connected in parallel to the coil of the relay automatically when the relay is in a static mode; and when the relay makes an action, the resistor connected in parallel to the coil is disconnected automatically, so that the holding current of the relay after action is reduced. Therefore, the power consumption can be reduced well and the circuit heating can be prevented. The circuit has advantages of simple design, less elements, and reliable performance and the like.
Description
Technical field
The present invention can be widely used in system of relay protection, automation control system, and electromagnetic environment is complicated, requires high occasion to relay reliability.
Background technology
Along with the development of Microcomputer Protection technology, various small-sized, volume is little because having for midget relay, quick action, low-power consumption, be convenient to the advantages such as integrated, be widely used in its control loop.
But in recent years, microcomputer protection system repeatedly occurred misoperation, caused very large loss to user, even brought potential safety hazard.Analyze its reason, interference free performance difference is an important factor, wherein small-sized as what export, miniature auxiliary relay because of internal resistance larger, operating current is little, the low various interference be easily subject in power system operation of operation voltage, during as DC low-voltage loop disconnection inductive load, the interference of fast transient pulse radio can be produced, electromagnetic interference is produced during high-voltage electrical equipment operation, the interference of the distributed capacitance feed-in between current circuit and relay control circuit, charged operating personnel produce the misoperation that electric discharge etc. all can cause relay when touching equipment current-carrying part.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the present invention proposes a kind of relay anti-jamming circuit, it can wrap a resistance in parallel at relay line automatically when relay is in static state, reduce the internal resistance of relay line bag, increase actuating of relay electric current, strengthen relay antijamming capability, when after the actuating of relay, automatically the resistance wrapped by line disconnects, and reduces the maintenance electric current after the actuating of relay, prevents circuit from generating heat.
the present invention solves its technical problem, and the technical scheme adopted is:
A kind of relay anti-jamming circuit, it comprises relay element and the resistance composition that at least has two groups of contacts, it is characterized in that: after in series with a resistor for one group of normally-closed contact in relay element, be parallel to relay line bag two ends, the output contact that all the other contacts of relay use as client.
Above-mentioned a kind of relay anti-jamming circuit, is characterized in that: reduce the internal resistance of relay line bag by wrapping parallel resistance at relay line, increases actuating of relay electric current, realizes the jamproof effect of relay;
Above-mentioned a kind of relay anti-jamming circuit, is characterized in that: utilize one of relay group of normally-closed contact to carry out the break-make of control relay line bag resistance, before playing the actuating of relay, resistor coupled in parallel is wrapped in its line, is disconnected by resistance after the actuating of relay.
compared with prior art, the invention has the beneficial effects as follows:
The present invention proposes a kind of relay anti-jamming circuit, adopt and wrap parallel resistance to increase the operating current of relay at relay line, various interference in absorption control loop, thus reach the jamproof object of relay, after the actuating of relay, automatically can wrap resistance in parallel by striping, resistance can be avoided to be energized for a long time the heating caused, it is simple that circuit has principle, and components and parts consumption is few, the advantage of dependable performance.
Accompanying drawing explanation
below in conjunction with the drawings and specific embodiments, the present invention is described in further details, embodiment
Fig. 1 is a kind of relay anti-jamming circuit schematic diagram, be made up of resistance R1 and relay element K1, wherein relay K 1 has two groups of contacts, COM1, NO1, NC1 are one group, COM2, NO2, NC2 are second group, anti-jamming circuit is made up of the moving contact COM1 in first group of contact, normally-closed contact NC1 and resistance R1, R1 one end is connected on NC1, one end is connected to relay line bag one end in addition, moving contact COM1 is connected to the relay line bag other end, be connected to become relay automatic control anti-jamming circuit, second group of contact is then supplied to user and uses.
When relay is in static condition, relay contact COM1, NC1 are in conducting state, and resistance R1 and relay line bag are equivalent to parallel connection, the electric current of control loop will pass through from R1 and line bag simultaneously, if now have disturbance current, will be shunted by R1, thus reach jamproof object.When effective control signal is come, although now portion of electrical current still can be shunted by R1, but its electric current and voltage exceed a lot than interference signal, so there is the enough current drives actuating of relay, once the actuating of relay back contact COM1, NC1 can disjunctions immediately, now R1 is wrapped disconnection from relay line, drive current is no longer shunted by R1, effectively prevent R1 to be energized for a long time the heating caused, reduce system power dissipation.
Above-describedly be only preferred embodiment of the present invention, be not limited to content of the present invention, every any amendment done within the spirit and principles in the present invention, equivalently to replace and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a relay anti-jamming circuit, it comprises relay element and the resistance composition that at least has two groups of contacts, relay element wherein one group of normally-closed contact in series with a resistor after, be parallel to relay line bag two ends, all the other contacts of relay are as spendable output contact.
2. according to a kind of relay anti-jamming circuit described in claim 1, it is characterized in that: when relay is in static condition, relay contact COM1, NC1 are in conducting state, and resistance R1 and relay line bag are equivalent to parallel connection.
3. according to a kind of relay anti-jamming circuit described in claim 1, it is characterized in that: the actuating of relay back contact COM1, NC1 can disjunctions immediately, and now R1 and relay line bag disconnect, and drive current no longer flows through this branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309443.3A CN104882332A (en) | 2015-06-09 | 2015-06-09 | Anti-interference circuit of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309443.3A CN104882332A (en) | 2015-06-09 | 2015-06-09 | Anti-interference circuit of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104882332A true CN104882332A (en) | 2015-09-02 |
Family
ID=53949786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510309443.3A Pending CN104882332A (en) | 2015-06-09 | 2015-06-09 | Anti-interference circuit of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104882332A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158511A (en) * | 2016-08-30 | 2016-11-23 | 成都英格瑞德电气有限公司 | Improvement anti-clutter circuit based on LLC resonance circuit |
| CN107068487A (en) * | 2017-04-11 | 2017-08-18 | 刘禹辰 | It is a kind of that the method that dry contact signal circuit induced voltage influences is eliminated by relay |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030094858A1 (en) * | 2001-11-20 | 2003-05-22 | Lih-Ren Shiue | Electronic timers using supercapacitors |
| CN102386019A (en) * | 2011-06-30 | 2012-03-21 | 大连大工安道船舶技术有限责任公司 | Overspeed relay anti-interference circuit |
| CN104298142A (en) * | 2014-10-10 | 2015-01-21 | 中国航天科技集团公司第四研究院第四十一研究所 | Anti-interference control circuit for launch control equipment |
| CN204927184U (en) * | 2015-06-09 | 2015-12-30 | 成都瑞联电气股份有限公司 | Relay anti -jamming circuit |
-
2015
- 2015-06-09 CN CN201510309443.3A patent/CN104882332A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030094858A1 (en) * | 2001-11-20 | 2003-05-22 | Lih-Ren Shiue | Electronic timers using supercapacitors |
| CN102386019A (en) * | 2011-06-30 | 2012-03-21 | 大连大工安道船舶技术有限责任公司 | Overspeed relay anti-interference circuit |
| CN104298142A (en) * | 2014-10-10 | 2015-01-21 | 中国航天科技集团公司第四研究院第四十一研究所 | Anti-interference control circuit for launch control equipment |
| CN204927184U (en) * | 2015-06-09 | 2015-12-30 | 成都瑞联电气股份有限公司 | Relay anti -jamming circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158511A (en) * | 2016-08-30 | 2016-11-23 | 成都英格瑞德电气有限公司 | Improvement anti-clutter circuit based on LLC resonance circuit |
| CN107068487A (en) * | 2017-04-11 | 2017-08-18 | 刘禹辰 | It is a kind of that the method that dry contact signal circuit induced voltage influences is eliminated by relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |