CN203056542U - Overvoltage under-voltage protection device - Google Patents
Overvoltage under-voltage protection device Download PDFInfo
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- CN203056542U CN203056542U CN 201220723111 CN201220723111U CN203056542U CN 203056542 U CN203056542 U CN 203056542U CN 201220723111 CN201220723111 CN 201220723111 CN 201220723111 U CN201220723111 U CN 201220723111U CN 203056542 U CN203056542 U CN 203056542U
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Abstract
The utility model discloses an overvoltage under-voltage protection device including a main circuit, a rectification filter circuit, a sampling comparison circuit, a control circuit, a delay circuit and an indication circuit. The main circuit, the rectification filter circuit and the sampling comparison circuit are connected with the control circuit successively. The control circuit is connected with the delay circuit and the indication circuit. The overvoltage under-voltage protection device provided by the utility model can be used for indicating and cutting power automatically when overvoltage and under-voltage conditions of a circuit occur and can be used for delayed starting in a condition that the circuit returns to normal.
Description
Technical field
The utility model relates to Analog Electronics Technique, Digital Electronic Technique, electric and electronic technical field, relates in particular to a kind ofly to occur indicating under superpressure and the under-voltage situation at circuit, and the ultra under-pressure protective device of outage automatically.
Background technology
Along with the development of modern electric, more and more higher to the protection requirement of power consumption equipment.When the voltage in the circuit was undesired, for unattended electronic equipment, how the reliability service of effective protection equipment was the problem that people are studying always.For some special equipment, superpressure and under-voltage magnitude of voltage there are higher requirement, different equipment has different settings; The equipment that also has needs to restart certain recovery time again after the suspension.Given this, we need design the ultra under-pressure protective device of a energy head it off.
Summary of the invention
The purpose of this utility model provides a kind of ultra under-pressure protective device, makes circuit occur under superpressure and the under-voltage situation, can indicate, outage automatically, and recover at circuit can delayed startup under the normal situation.
The technical scheme that the utility model adopts specifically is achieved in that
The utility model provides a kind of ultra under-pressure protective device; it is characterized in that; comprise main circuit, current rectifying and wave filtering circuit, sampling comparison circuit, control circuit, delay circuit and indicating circuit; described main circuit, described current rectifying and wave filtering circuit, described sampling comparison circuit are connected successively with described control circuit, and described control circuit is connected with described delay circuit, described indicating circuit.
Preferably, the input of the described control circuit of output termination of described sampling comparison circuit, the output part of described control circuit connects the input of described delay circuit, and another part connects the input of described indicating circuit.
Preferably, described main circuit is made of bidirectional thyristor, load, the 17 resistance, the 4th electric capacity.
Preferably, described current rectifying and wave filtering circuit is made of transformer, diode, first electric capacity and second electric capacity.
Preferably, described sampling comparison circuit is made of first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 14 resistance, the 15 resistance, the 16 resistance, first voltage-stabiliser tube, second pressurizer, first comparator, second comparator, first rheostat and second rheostat.
Preferably, described first comparator and described second comparator adopt four voltage comparator integrated circuits.
Preferably, described control circuit by XOR gate, second and the door, the 3rd with the door and NOR gate constitute.
Preferably, described delay circuit is made of the 9th resistance, the tenth resistance, the 3rd rheostat, the 3rd electric capacity, the 5th diode.
Preferably, constitute the charge circuit of electric capacity after described the 9th resistance, described the 3rd rheostat, described the 3rd capacitances in series, changed the described the 3rd rheostatic resistance, then can change the charging interval; Constituted the capacitance discharges loop after described the tenth resistance, described the 5th diode, described the 3rd capacitances in series, described the tenth resistance is enough little, then can discharge rapidly.
Preferably, described indicating circuit is made of the 11 resistance, the 12 resistance, the 13 resistance, first light-emitting diode, second light-emitting diode, the 3rd light-emitting diode.
Ultra under-pressure protective device of the present utility model can make circuit occur under superpressure and the under-voltage situation, can indicate, outage automatically, and recover at circuit can delayed startup under the normal situation.
Description of drawings
Fig. 1 is the circuit theory diagrams of the ultra under-pressure protective device of the utility model embodiment.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with accompanying drawing embodiment of the present utility model is described in detail, it will be more clear making above-mentioned and other purpose, feature and advantage of the present utility model.Reference numeral identical in whole accompanying drawings is indicated identical part.Painstakingly do not draw accompanying drawing in proportion, focus on illustrating purport of the present utility model.
Below in conjunction with Fig. 1 the specific embodiment of ultra under-pressure protective device of the present utility model is elaborated.
Fig. 1 is the circuit theory diagrams of the ultra under-pressure protective device of the utility model embodiment; as shown in Figure 1; the ultra under-pressure protective device of the utility model embodiment; comprise main circuit 1, current rectifying and wave filtering circuit 2, sampling comparison circuit 3, control circuit 4, delay circuit 5 and indicating circuit 6; main circuit 1, current rectifying and wave filtering circuit 2, sampling comparison circuit 3 are connected successively with control circuit 4, and control circuit 4 is connected with delay circuit 5, indicating circuit 6.
The input side of main circuit 1 voltage that gets access to grid, voltage load operate as normal just often in the circuit, superpressure appears in the circuit and when under-voltage the load outage do not work; The input side of current rectifying and wave filtering circuit 2 voltage that gets access to grid equally, purpose is that alternating current is transformed into suitable elimination interference and the direct current of high frequency clutter, the direct current that this circuit obtains is as the input signal of sampling comparison circuit 3; The effect of sampling comparison circuit 3 is that the output DC of current rectifying and wave filtering circuit 2 and superpressure critical value and the under-voltage critical value that configures are compared, from the suitable high and low level of output output of this circuit; The input of the output connection control circuit 4 of sampling comparison circuit 3 behind the high and low level that control circuit 4 reception sampling comparison circuits 3 are sent, is handled, and produces suitable control signal and output; The output part of control circuit 4 connects the input of delay circuit 5, another part connects the input of indicating circuit 6, delay circuit 5 occurs not delaying time under superpressure and the under-voltage situation at circuit, voltage is just often delayed time in the line, delay time can be set, purpose be at fractional load after outage, need certain recovery time, crossed the recovery time back loading and just can start, the control input end of delay circuit 5 output termination main circuits 1; Be that superpressure, under-voltage or normal voltage are carried out the LED indication in 6 pairs of circuits of indicating circuit.
The ultra under-pressure protective device of the utility model embodiment; main circuit 1 is made of bidirectional thyristor KS, load, the 17 resistance R 17, the 4th capacitor C 4; the 17 resistance R 17 is in parallel with bidirectional thyristor KS with the 4th capacitor C 4; for the protection of bidirectional thyristor KS; in the main circuit 1 bidirectional thyristor KS be connected on alternating current AC two ends after load is connected, bidirectional thyristor KS is used for control load and whether receives circuit and carries out work.
Current rectifying and wave filtering circuit 2 is made of transformer T, diode D1-D4, first capacitor C 1 and second capacitor C 2, the side joint alternating current AC of transformer T, secondary side is connected to wherein two terminals of the single-phase bridge circuit that is made of diode D1-D4, and the single-phase bridge circuit is used for alternating current is converted to the direct current of pulsation.Be connected to two terminals in addition of the single-phase bridge circuit that is constituted by diode D1-D4 after first capacitor C 1 and 2 parallel connections of second capacitor C, be used for reducing galvanic pulsation, filtering high frequency clutter.
Be connected in parallel on second capacitor C, 2 two ends after the 5th resistance R 5, the 7th resistance R 7 and the first rheostat RP1 series connection, carry out dividing potential drop, the first voltage-stabiliser tube Z1 is connected in parallel on by the circuit two ends after the 7th resistance R 7 and the first rheostat RP1 series connection, be used for voltage stabilizing, the slide head of the first rheostat RP1 connects the reverse input end of the first comparator A1, change the resistance of the first rheostat RP1, then change the superpressure critical value.In like manner, also be connected in parallel on second capacitor C, 2 two ends after the 6th resistance R 6, the 8th resistance R 8 and the second rheostat RP2 series connection, carry out dividing potential drop, the second voltage-stabiliser tube Z2 is connected in parallel on by the circuit two ends after the 8th resistance R 8 and the second rheostat RP2 series connection, be used for voltage stabilizing, the slide head of the second rheostat RP2 connects the reverse input end of the second comparator A2, changes the resistance of the second rheostat RP2, then changes under-voltage critical value.
The first comparator A1 and the second comparator A2 adopt four voltage comparator integrated circuit LM339.
The positive input of first resistance R, 1 one terminations, the first comparator A1, the output of another termination first comparator A1 is used for improving reliability.The output of the 14 resistance R 14 1 terminations first comparator A1, another termination+5V power supply.
In like manner, the positive input of the 16 resistance R 16 1 terminations second comparator A2, the output of another termination second comparator A2 is used for improving reliability.The output of the 15 resistance R 15 1 terminations second comparator A2, another termination+5V power supply.
Control circuit 4 by XOR gate U1, second and door U2, the 3rd constitute with door U3 and NOR gate U4, XOR gate U1, the 3rd is two entering apparatus with door U3, NOR gate U4, the output of input termination first a comparator A1, the output of another input termination second comparator A2, the digital signal that is used for the high and low level of output, second with the output of the two input termination XOR gate U1 of door U2, be used for the signal transmission.
Delay circuit 5 is made of the 9th resistance R 9, the tenth resistance R 10, the 3rd rheostat RP3, the 3rd capacitor C 3, the 5th diode D5, constituted the charge circuit of electric capacity after the 9th resistance R 9, the 3rd rheostat RP3,3 series connection of the 3rd capacitor C, change the resistance of the 3rd rheostat RP3, then can change the charging interval; Constituted the capacitance discharges loop after the tenth resistance R 10, the 5th diode D5,3 series connection of the 3rd capacitor C, the tenth resistance R 10 is enough little, then can discharge rapidly.When the voltage in the circuit was higher than the superpressure critical value or is lower than under-voltage critical value, the 3rd capacitor C 3 was discharged rapidly, and the upper end A point of the 3rd capacitor C 3 is sent low level, and bidirectional thyristor KS disconnects, and load is excised from electrical network; Voltage in circuit just often, the 3rd capacitor C 3 was charged by the time that configures, and reached after the set point upper end A point of the 3rd capacitor C 3 and sent high level, bidirectional thyristor KS connects main circuit, with the load switching in electrical network.
Indicating circuit 6 is made of the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, first LED 1, second LED 2, the 3rd LED 3, first LED, 1 indication normal voltage, second LED, 2 indication superpressures, 3 indications of the 3rd LED are under-voltage.The 11 resistance R 11 connect with first LED 1 back one termination XOR gate U1 output, other end ground connection, the voltage in main circuit just often, first LED 1 is bright; The output of a termination the 3rd and door U3 after the 12 resistance R 12 is connected with second LED 2, other end ground connection, when the voltage superpressure in the main circuit, second LED 2 is bright; The output of a termination NOR gate U4 after the 13 resistance R 13 is connected with the 3rd LED 3, other end ground connection, when the under-voltage in the main circuit, the 3rd LED 3 is bright.
The beneficial effects of the utility model are: circuit structure is simple, and working stability, precision height, volume are little; Simultaneously can be according to different load set time of delay; Superpressure critical value and under-voltage critical value also can be adjusted, and superpressure and can in time disconnect main circuit when under-voltage can effectively be protected payload security work.
In above description, a lot of details have been set forth so that fully understand the utility model.But above description only is preferred embodiment of the present utility model, and the utility model can be implemented much to be different from alternate manner described here, so the utility model is not subjected to the restriction of top disclosed concrete enforcement.Any skilled personnel are not breaking away under the technical solutions of the utility model scope situation simultaneously, all can utilize method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Every content that does not break away from technical solutions of the utility model according to any simple modification, equivalent variations and the modification that technical spirit of the present utility model is done above embodiment, all still belongs in the scope of technical solutions of the utility model protection.
Claims (10)
1. ultra under-pressure protective device; it is characterized in that; comprise main circuit, current rectifying and wave filtering circuit, sampling comparison circuit, control circuit, delay circuit and indicating circuit; described main circuit, described current rectifying and wave filtering circuit, described sampling comparison circuit are connected successively with described control circuit, and described control circuit is connected with described delay circuit, described indicating circuit.
2. ultra under-pressure protective device according to claim 1; it is characterized in that; the input of the described control circuit of output termination of described sampling comparison circuit, the output part of described control circuit connects the input of described delay circuit, and another part connects the input of described indicating circuit.
3. ultra under-pressure protective device according to claim 1 is characterized in that, described main circuit is made of bidirectional thyristor, load, the 17 resistance, the 4th electric capacity.
4. ultra under-pressure protective device according to claim 1 is characterized in that, described current rectifying and wave filtering circuit is made of transformer, diode, first electric capacity and second electric capacity.
5. ultra under-pressure protective device according to claim 1; it is characterized in that described sampling comparison circuit is made of first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 14 resistance, the 15 resistance, the 16 resistance, first voltage-stabiliser tube, second pressurizer, first comparator, second comparator, first rheostat and second rheostat.
6. ultra under-pressure protective device according to claim 5 is characterized in that, described first comparator and described second comparator adopt four voltage comparator integrated circuits.
7. ultra under-pressure protective device according to claim 1 is characterized in that, described control circuit by XOR gate, second and the door, the 3rd with the door and NOR gate constitute.
8. ultra under-pressure protective device according to claim 1 is characterized in that, described delay circuit is made of the 9th resistance, the tenth resistance, the 3rd rheostat, the 3rd electric capacity, the 5th diode.
9. ultra under-pressure protective device according to claim 8 is characterized in that, has constituted the charge circuit of electric capacity after described the 9th resistance, described the 3rd rheostat, described the 3rd capacitances in series, changes the described the 3rd rheostatic resistance, then can change the charging interval; Constituted the capacitance discharges loop after described the tenth resistance, described the 5th diode, described the 3rd capacitances in series, described the tenth resistance is enough little, then can discharge rapidly.
10. ultra under-pressure protective device according to claim 1 is characterized in that, described indicating circuit is made of the 11 resistance, the 12 resistance, the 13 resistance, first light-emitting diode, second light-emitting diode, the 3rd light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220723111 CN203056542U (en) | 2012-12-25 | 2012-12-25 | Overvoltage under-voltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220723111 CN203056542U (en) | 2012-12-25 | 2012-12-25 | Overvoltage under-voltage protection device |
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| Publication Number | Publication Date |
|---|---|
| CN203056542U true CN203056542U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220723111 Expired - Fee Related CN203056542U (en) | 2012-12-25 | 2012-12-25 | Overvoltage under-voltage protection device |
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| CN (1) | CN203056542U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350280A (en) * | 2020-09-02 | 2021-02-09 | 扬州正扬电力科技有限公司 | Power failure detection circuit and detection method of intelligent capacitor |
-
2012
- 2012-12-25 CN CN 201220723111 patent/CN203056542U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350280A (en) * | 2020-09-02 | 2021-02-09 | 扬州正扬电力科技有限公司 | Power failure detection circuit and detection method of intelligent capacitor |
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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 |
Granted publication date: 20130710 Termination date: 20151225 |
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| EXPY | Termination of patent right or utility model |