CN204927184U - Relay anti -jamming circuit - Google Patents
Relay anti -jamming circuit Download PDFInfo
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- CN204927184U CN204927184U CN201520389660.3U CN201520389660U CN204927184U CN 204927184 U CN204927184 U CN 204927184U CN 201520389660 U CN201520389660 U CN 201520389660U CN 204927184 U CN204927184 U CN 204927184U
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- relay
- resistance
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- jamming circuit
- parallel
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Abstract
The utility model discloses a relay anti -jamming circuit, it includes the relay element and the resistors that have two sets of contacts at least, the principle is the action current who increases the relay in relay solenoid parallel resistance, absorbs the various interference among the control circuit to reach relay anti -jamming mesh, its characterized in that: the automatic resistance that connects in parallel on its solenoid behind relay operation, broke off resistance parallelly connected on the solenoid automatically when the relay was in static state for holding current behind the relay operation reduces, is favorable to reducing the consumption, prevents that the circuit from generating heat. It is simple that this circuit has the design, and the components and parts quantity is few, advantages such as dependable performance.
Description
Technical field
The utility model 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 utility model 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 utility model 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 beneficial effects of the utility model are:
The utility model 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 utility model 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 utility model; be not limited to content of the present utility model; every make within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
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. a kind of relay anti-jamming circuit according to 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. a kind of relay anti-jamming circuit according to claim 1, 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 |
|---|---|---|---|
| CN201520389660.3U CN204927184U (en) | 2015-06-09 | 2015-06-09 | Relay anti -jamming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520389660.3U CN204927184U (en) | 2015-06-09 | 2015-06-09 | Relay anti -jamming circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204927184U true CN204927184U (en) | 2015-12-30 |
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ID=54976292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520389660.3U Active CN204927184U (en) | 2015-06-09 | 2015-06-09 | Relay anti -jamming circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204927184U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882332A (en) * | 2015-06-09 | 2015-09-02 | 成都瑞联电气股份有限公司 | Anti-interference circuit of relay |
-
2015
- 2015-06-09 CN CN201520389660.3U patent/CN204927184U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882332A (en) * | 2015-06-09 | 2015-09-02 | 成都瑞联电气股份有限公司 | Anti-interference circuit of relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |