CN204167203U - A kind of relay contact protection circuit - Google Patents
A kind of relay contact protection circuit Download PDFInfo
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- CN204167203U CN204167203U CN201420571796.1U CN201420571796U CN204167203U CN 204167203 U CN204167203 U CN 204167203U CN 201420571796 U CN201420571796 U CN 201420571796U CN 204167203 U CN204167203 U CN 204167203U
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Abstract
The utility model is applicable to direct current input switch power supply front end or direct current export technique field, a kind of relay contact protection circuit is disclosed, comprise the first voltage-stabiliser tube, metal-oxide-semiconductor, optocoupler, second voltage-stabiliser tube, input anode is by the collector electrode of current-limiting resistance and optocoupler triode end, the negative pole of the first voltage-stabiliser tube is connected with the contact of electric capacity one end, input negative terminal connects the source electrode of metal-oxide-semiconductor, the negative pole of the first voltage-stabiliser tube and the contact of electric capacity one end, divider resistance is attempted by grid and the source electrode two ends of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor connects the emitter of optocoupler triode end, export the drain electrode that negative terminal connects metal-oxide-semiconductor, optocoupler input passes through charging resistor, second voltage-stabiliser tube is connected with line bag.The contact of the utility model energy protection relay, effectively isolates during the actuating of relay the interference of input power, and safely, reliable, realization is simple, durable, failure rate is low.
Description
Technical field
The utility model is applicable to direct current input switch power supply front end or direct current export technique field, particularly needs a kind of relay contact protection circuit using Control to export.
Background technology
Switch opens and closes exactly, can also refer to one and makes open circuit, electric current is cut off or make it flow to the electronic devices and components of other circuit.
Relay is the automatic switch element with isolation features, and being widely used in remote control, remote measurement, communication, automatically control, electromechanical integration and power electronic equipment, is one of most important control element.
Electronic switch refers to the running unit utilizing power electronic device realizing circuit break-make, at least comprises a controlled electronic valve device.
Relay effectively controls big current with small area analysis, is simple and easy to use, and because the mechanical contact of relay exists the phenomenon such as mechanical wear, electric arc burn when opening and closing, contact endurance is short, reliability and maintainability poor.
Interference to circuit during in order to solve the short and relay contact action of relay contact life-span, needs to increase some peripheral circuits and carries out available protecting to relay contact, the more important thing is and prevent relay contact from causing interference when switching to circuit.
Summary of the invention
Designed by the utility model: a kind of relay contact protection circuit; the interference produced when solving relay contact action is on the impact of input power; be equivalent to Sofe Switch; the more important thing is the contact of effective protection relay; be a kind of new type of relay electrical shock protection circuit based on interference and insulation, and apply it on the circuit of use Control.
Scheme of the present utility model is: a kind of relay contact protection circuit, is a kind of relay interference and insulation device, comprises current-limiting resistance (1); first voltage-stabiliser tube (2), electric capacity (3), divider resistance (4); metal-oxide-semiconductor (5), optocoupler (6), the second voltage-stabiliser tube (7); charging resistor (8); postponing electric capacity (9), four input interfaces, is input anode, input negative terminal, line bag anode, line bag negative terminal respectively; an output interface is output plus terminal.
Input one end of positive termination current-limiting resistance (1), the collector electrode of another termination optocoupler (6) triode end of current-limiting resistance (1), the other end of current-limiting resistance (1) also connects the negative pole of the first voltage-stabiliser tube (2) and one end of electric capacity (3) simultaneously, the negative other end of termination capacitor (3) of input and the positive pole of the first voltage-stabiliser tube (2), input the source electrode that negative terminal also connects metal-oxide-semiconductor (5) simultaneously, divider resistance (4) is attempted by grid and the source electrode two ends of metal-oxide-semiconductor (5), the grid of metal-oxide-semiconductor (5) connects the emitter of optocoupler (6) triode end, export the drain electrode that negative terminal connects metal-oxide-semiconductor (5), one end of the positive termination charging resistor (8) of line bag, the negative pole of another termination second voltage-stabiliser tube (7) of charging resistor (8) and the positive pole of delay electric capacity (9), the positive pole of the second voltage-stabiliser tube (7) connects the positive pole of optocoupler (6) light-emitting diodes pipe end, the negative pole of optocoupler (6) light-emitting diodes pipe end connects the negative pole postponing electric capacity (9), the negative pole also wiring bag negative terminal of optocoupler (6) light-emitting diodes pipe end simultaneously.
Owing to adopting technical scheme as above, the utility model has following superiority:
A kind of relay contact protection circuit is a kind of relay interference and insulation device; the interference produced when solving relay contact action is on the impact of input power; be equivalent to Sofe Switch; the more important thing is the contact of effective protection relay; be a kind of relay contacts protective circuit based on interference and insulation, and apply it on the circuit of use Control.This relay protection circuit, can the contact of protection relay, and make relay avoid switching big current, useful life extends, the interference produced when simultaneously can reduce the actuating of relay, reduces failure rate.
Accompanying drawing explanation
Fig. 1 relay contact protection circuit schematic diagram;
Fig. 2 relay contact protection application circuit theory diagrams;
In figure, 1 is current-limiting resistance, and 2 is first voltage-stabiliser tubes, and 3 is electric capacity, and 4 is divider resistances, and 5 is metal-oxide-semiconductors, and 6 is optocouplers, and 7 is second voltage-stabiliser tubes, and 8 is charging resistors, and 9 is postpone electric capacity.10 is relays.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
As shown in Figure 2, a kind of relay contact protection circuit is new type of relay protective circuit; as shown in Figure 2, comprise current-limiting resistance (1), the first voltage-stabiliser tube (2); electric capacity (3), divider resistance (4), metal-oxide-semiconductor (5); optocoupler (6), the second voltage-stabiliser tube (7), charging resistor (8); postponing electric capacity (9), four input interfaces, is input anode, input negative terminal, line bag anode, line bag negative terminal respectively; an output interface is output plus terminal.
Input one end of positive termination current-limiting resistance (1), the collector electrode of another termination optocoupler (6) triode end of current-limiting resistance (1), the other end of current-limiting resistance (1) also connects the negative pole of the first voltage-stabiliser tube (2) and one end of electric capacity (3) simultaneously, the negative other end of termination capacitor (3) of input and the positive pole of the first voltage-stabiliser tube (2), input the source electrode that negative terminal also connects metal-oxide-semiconductor (5) simultaneously, divider resistance (4) is attempted by grid and the source electrode two ends of metal-oxide-semiconductor (5), the grid of metal-oxide-semiconductor (5) connects the emitter of optocoupler (6) triode end, export the drain electrode that negative terminal connects metal-oxide-semiconductor (5), one end of the positive termination charging resistor (8) of line bag, the negative pole of another termination second voltage-stabiliser tube (7) of charging resistor (8) and the positive pole of delay electric capacity (9), the positive pole of the second voltage-stabiliser tube (7) connects the positive pole of optocoupler (6) light-emitting diodes pipe end, the negative pole of optocoupler (6) light-emitting diodes pipe end connects the negative pole postponing electric capacity (9), the negative pole also wiring bag negative terminal of optocoupler (6) light-emitting diodes pipe end simultaneously.Relay (10) is serially connected between input anode and output plus terminal.
When online bag anode and line bag negative terminal do not have a signal, optocoupler (6) not conducting, the VGS no-voltage of metal-oxide-semiconductor (5), metal-oxide-semiconductor (5) ends, input anode and export no-voltage between negative terminal, only has when line bag anode and line bag negative terminal reach the operating voltage (V of relay (10)
i) after, optocoupler (6) conducting, the VGS of metal-oxide-semiconductor (5) has operating voltage, metal-oxide-semiconductor (5) conducting, has voltage between input anode and output negative terminal.
When line bag anode and line bag negative terminal reach the operating voltage (V of relay (10)
i) after, input anode and export can postpone certain hour t between negative terminal after export, time t is by the operating voltage (Vi) of relay (10) and the second voltage-stabiliser tube (7), and charging resistor (8), postpones electric capacity (9) decision.
This circuit has certain load capacity, and load capacity is determined by the performance of metal-oxide-semiconductor (5) and relay (10).
Specific embodiment: current-limiting resistance (1), charging resistor (8) selects RJ24-0.25W-4.99K Ω, divider resistance (8) selects RJ24-0.25W-49.9K Ω, first voltage-stabiliser tube (2) selects BWB12, second voltage-stabiliser tube (7) selects BWB3V6, metal-oxide-semiconductor (5) selects IRFP260, optocoupler (6) selects TLP627-1, electric capacity (3) selects CBB-63V-0.1uF, charging capacitor (9) selects CD263-10V-470uF, line bag operating voltage 27V selected by relay (10), contact current 10A.
The work of relay contacts protective circuit,
When input anode and input negative terminal power up 12V, the load of band 3A, when line bag anode and line bag negative terminal do not power up, relay is failure to actuate, no-voltage between output plus terminal and output negative terminal.
Power up 12V, the load of band 3A when inputting anode and inputting negative terminal, when line bag anode and line bag negative terminal power up 27V, the first action of relay, between output plus terminal and output negative terminal, output voltage is 11.88V, exports after postponing 200mS relative to input voltage.
Have above-described embodiment to learn, this circuit can the contact of protection relay, and make relay avoid switching big current, useful life extends, the interference produced when simultaneously can reduce the actuating of relay, reduces failure rate.This circuit realiration is effective, and the contact of energy protection relay, effectively isolates during the actuating of relay the interference of input power, and safely, reliable, realization is simple, durable, failure rate is low.
Claims (1)
1. a relay contact protection circuit, it is characterized in that: comprise current-limiting resistance (1), first voltage-stabiliser tube (2), electric capacity (3), divider resistance (4), metal-oxide-semiconductor (5), optocoupler (6), second voltage-stabiliser tube (7), charging resistor (8), postpone electric capacity (9), four input interfaces, input anode respectively, input negative terminal, line bag anode, line bag negative terminal, an output interface, it is output plus terminal, input one end of positive termination current-limiting resistance (1), the collector electrode of another termination optocoupler (6) triode end of current-limiting resistance (1), the other end of current-limiting resistance (1) also connects the negative pole of the first voltage-stabiliser tube (2) and one end of electric capacity (3) simultaneously, the negative other end of termination capacitor (3) of input and the positive pole of the first voltage-stabiliser tube (2), input the source electrode that negative terminal also connects metal-oxide-semiconductor (5) simultaneously, divider resistance (4) is attempted by grid and the source electrode two ends of metal-oxide-semiconductor (5), the grid of metal-oxide-semiconductor (5) connects the emitter of optocoupler (6) triode end, export the drain electrode that negative terminal connects metal-oxide-semiconductor (5), one end of the positive termination charging resistor (8) of line bag, the negative pole of another termination second voltage-stabiliser tube (7) of charging resistor (8) and the positive pole of delay electric capacity (9), the positive pole of the second voltage-stabiliser tube (7) connects the positive pole of optocoupler (6) light-emitting diodes pipe end, the negative pole of optocoupler (6) light-emitting diodes pipe end connects the negative pole postponing electric capacity (9), the negative pole also wiring bag negative terminal of optocoupler (6) light-emitting diodes pipe end simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571796.1U CN204167203U (en) | 2014-09-30 | 2014-09-30 | A kind of relay contact protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571796.1U CN204167203U (en) | 2014-09-30 | 2014-09-30 | A kind of relay contact protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167203U true CN204167203U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420571796.1U Expired - Fee Related CN204167203U (en) | 2014-09-30 | 2014-09-30 | A kind of relay contact protection circuit |
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| Country | Link |
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| CN (1) | CN204167203U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094604A (en) * | 2016-08-26 | 2016-11-09 | 衡阳合力工业车辆有限公司 | A kind of control system of explosion-proof industrial vehicle |
| CN106230259A (en) * | 2016-09-26 | 2016-12-14 | 航天长峰朝阳电源有限公司 | A kind of controllable type high efficiency non-isolated booster power module |
| CN108831798A (en) * | 2018-07-04 | 2018-11-16 | 杭州乾程弘泰电力科技有限公司 | A kind of intelligent electric meter magnetic latching relay driving device |
| CN111579631A (en) * | 2020-06-11 | 2020-08-25 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
| CN118275754A (en) * | 2024-04-10 | 2024-07-02 | 北京德锐士科技有限公司 | Isolated remote signaling state indicating circuit |
-
2014
- 2014-09-30 CN CN201420571796.1U patent/CN204167203U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094604A (en) * | 2016-08-26 | 2016-11-09 | 衡阳合力工业车辆有限公司 | A kind of control system of explosion-proof industrial vehicle |
| CN106230259A (en) * | 2016-09-26 | 2016-12-14 | 航天长峰朝阳电源有限公司 | A kind of controllable type high efficiency non-isolated booster power module |
| CN108831798A (en) * | 2018-07-04 | 2018-11-16 | 杭州乾程弘泰电力科技有限公司 | A kind of intelligent electric meter magnetic latching relay driving device |
| CN108831798B (en) * | 2018-07-04 | 2023-12-08 | 青岛乾程科技股份有限公司 | Magnetic latching relay driving device for intelligent ammeter |
| CN111579631A (en) * | 2020-06-11 | 2020-08-25 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
| CN111579631B (en) * | 2020-06-11 | 2021-04-27 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
| CN118275754A (en) * | 2024-04-10 | 2024-07-02 | 北京德锐士科技有限公司 | Isolated remote signaling state indicating circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20190930 |