CN106532630A - Voltage protection circuit of computer display - Google Patents
Voltage protection circuit of computer display Download PDFInfo
- Publication number
- CN106532630A CN106532630A CN201611223300.1A CN201611223300A CN106532630A CN 106532630 A CN106532630 A CN 106532630A CN 201611223300 A CN201611223300 A CN 201611223300A CN 106532630 A CN106532630 A CN 106532630A
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- China
- Prior art keywords
- chip
- potentiometer
- diode
- relay
- protection circuit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
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Abstract
The invention discloses a voltage protection circuit of a computer display. The voltage protection circuit comprises a transformer W, a potentiometer RP2, a chip IC2 and a potentiometer RP1, wherein two ends of a winding N1 of the transformer W are connected to two ends of 220V AC respectively; one end of a winding N2 of the transformer W is connected with a port 1 of a rectifier bridge T and a transient voltage suppressor diode DW; and the other end of the transient voltage suppressor diode DW is connected with a port 3 of the rectifier bridge T and the other end of the winding N2 of the transformer W. According to the voltage protection circuit of the computer display, overvoltage and undervoltage conditions can be detected by using a voltage comparator and two groups of voltage sampling circuits respectively, protection is carried out when a certain limit is exceeded, and meanwhile, the voltage protection circuit has different light indicators, so that the voltage protection circuit has the advantages of being diverse in function, convenient to use and accurate to control.
Description
Technical field
The present invention relates to a kind of voltage protection circuit, specifically a kind of computer display voltage protection circuit.
Background technology
With the progress and the development of science and technology in epoch, the with no paper information age is gradually being popularized and is promoting, computer
One of information age most important electronic equipment, in being widely used in handling official business, live, learning, it is well known that the big portion of computer
Divide and be made up of main frame and display, most main frame and display are individually power supplies, during the use of computer, are met
The abnormal electrical power supply of display is likely to result in all to thunderbolt, hardware fault, power network fluctuation etc., abnormal electrical power supply can cause display interior
Burning for the electronic components such as image reproducer, in turn results in more serious consequence, therefore, it is necessary to carry out to the display of computer
Certain voltage protection.
The content of the invention
It is an object of the invention to provide a kind of computer display voltage protection circuit, to solve in above-mentioned background technology
The problem of proposition.
For achieving the above object, the present invention provides following technical scheme：
A kind of computer display voltage protection circuit, including transformator W, potentiometer RP2, chip IC 2 and potentiometer
The two ends of RP1, the winding N1 of the transformator W connect the two ends of 220V alternating currents respectively, and one end of the winding N2 of transformator W connects
Connect port 1 and the transient voltage suppressor diode DW of rectifier bridge T, the other end connection rectifier bridge of transient voltage suppressor diode DW
The port 3 of T and the other end of the winding N2 of transformator W, the connection of the port 2 electric capacity C1 of rectifier bridge T, electric capacity C2, potentiometer RP1
One fixing end, a fixing end of potentiometer RP2, the negative electrode of three end adjustable reference source P, the reference of three end adjustable reference source P
The other end connection other end of electric capacity C1 of the contact K-1 of pole, resistance R1, relay K and relay K, electric capacity C2, resistance R2,
Resistance R3, another fixing end of potentiometer RP1, another fixing end of potentiometer RP2, the emitter stage of audion V1, display
The port 4 of device A and rectifier bridge T, the anode of three end adjustable reference source P connect the other end of resistance R3, the sliding end of potentiometer RP1
The pin 1 of connection chip IC 1, the sliding end of potentiometer RP2 connect the pin 3 of chip IC 2, the other end connection chip of resistance R1
The pin 1 of the pin 3 and chip IC 2 of IC1, the pin 4 of chip IC 1 connect the anode of diode D1, and the negative electrode of diode D1 connects
The base stage of the negative electrode and audion V1 of diode D2 is connect, the pin 4 of chip IC 2 connects the anode of diode D2, audion V1's
The other end connection display A's of the contact K-1 of the other end of collector connection relay K, relay K and relay K is another
End.
As the preferred version of the present invention：The relay K is normally-closed contact relay.
As the preferred version of the present invention：The model of the chip IC 1 and chip IC 2 is LM339.
As the preferred version of the present invention：Model TL431 of the three ends adjustable reference source P.
As the preferred version of the present invention：The full-bridge rectification electricity that the rectifier bridge T is made up of 4 IN4001 type diodes
Road.
As the preferred version of the present invention：The diode D1 and diode D2 are light emitting diode.
Compared with prior art, the invention has the beneficial effects as follows：Computer display voltage protection circuit of the present invention can
Respectively over-pressed and under-voltage situation is detected using voltage comparator and two groups of voltage sample circuits, and beyond certain
Restriction is protected, while also carrying different lamplight pointings, therefore is had vdiverse in function, easy to use and is controlled accurately excellent
Point.
Description of the drawings
Circuit diagrams of the Fig. 1 for computer display voltage protection circuit.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to Fig. 1, a kind of computer display voltage protection circuit, including transformator W, potentiometer RP2, chip IC 2
With potentiometer RP1, the two ends of the winding N1 of the transformator W connect the two ends of 220V alternating currents, the winding N2 of transformator W respectively
One end connection rectifier bridge T port 1 and transient voltage suppressor diode DW, transient voltage suppressor diode DW the other end connect
Connect the other end of the port 3 of rectifier bridge T and the winding N2 of transformator W, the connection of the port 2 electric capacity C1 of rectifier bridge T, electric capacity C2, electricity
One fixing end of position device RP1, a fixing end of potentiometer RP2, the negative electrode of three end adjustable reference source P, three end adjustable references
The reference pole of source P, resistance R1, the contact K-1 of relay K and relay K, the other end connection electric capacity C1's of electric capacity C2 are another
End, another fixing end of another fixing end of resistance R2, resistance R3, potentiometer RP1, potentiometer RP2, audion V1 send out
The port 4 of emitter-base bandgap grading, display A and rectifier bridge T, the anode of three end adjustable reference source P connect the other end of resistance R3, potentiometer
The sliding end of RP1 connects the pin 1 of chip IC 1, and the sliding end of potentiometer RP2 connects the pin 3 of chip IC 2, and resistance R1's is another
The pin 1 of the pin 3 and chip IC 2 of one end connection chip IC 1, the pin 4 of chip IC 1 connect the anode of diode D1, two poles
The negative electrode and the base stage of audion V1 of the negative electrode connection diode D2 of pipe D1, the pin 4 of chip IC 2 connect the sun of diode D2
Pole, the other end of the collector connection relay K of audion V1, the other end connection of the contact K-1 of relay K and relay K
The other end of display A.
Relay K is normally-closed contact relay.The model of chip IC 1 and chip IC 2 is LM339.Three end adjustable references
Model TL431 of source P.The full bridge rectifier that rectifier bridge T is made up of 4 IN4001 type diodes.Diode D1 and two
Pole pipe D2 is light emitting diode.
The present invention operation principle be：220V civil powers are defeated after transformator W step-down rectifier bridge T rectifications, electric capacity C2 filtering
Go out DC voltage supply display A to use, transient voltage suppressor diode DW is used to eliminate civil power peak voltage, three end adjustable substrates
Quasi- source P and resistance R3 composition reference voltage circuits, provide constant reference voltage, chip to 1 foot of 3 feet and IC2 of chip IC 1
3 feet of 1 foot and chip IC 2 of IC1 obtain the sampling voltage of circuit respectively by potentiometer RP1, when voltage is higher than that overvoltage is critical
During value, 1 foot of chip IC 1 is higher than 3 foot voltages, and 3 feet of chip IC 2 are higher than 1 foot voltage, therefore IC1 exports low level, and IC2 is defeated
Go out high level, light emitting diode D2 is lighted, D1 does not work, audion V1 conductings, relay K are powered, and its contact K-1 disconnects, protection
From overvoltage damage, when voltage is less than under-voltage marginal value, 1 foot of chip IC 1 is less than 3 foot voltages to display A, and the 1 of chip IC 2
Foot is higher than 3 foot voltages, therefore IC2 exports low level, and IC1 exports high level, and light emitting diode D1 is lighted, D2 does not work, audion
V1 is turned on, and relay K is powered, and its contact K-1 disconnects, and protects display A from under-voltage damage.The state of light emitting diode can
The abnormal situation of instructed voltage, is convenient for people to investigation problem.
Claims (4)
1. a kind of computer display voltage protection circuit, including transformator W, potentiometer RP2, chip IC 2 and potentiometer RP1,
Characterized in that, the two ends of the winding N1 of the transformator W connect the two ends of 220V alternating currents, the winding N2 of transformator W respectively
One end connection rectifier bridge T port 1 and transient voltage suppressor diode DW, transient voltage suppressor diode DW the other end connect
Connect the other end of the port 3 of rectifier bridge T and the winding N2 of transformator W, the connection of the port 2 electric capacity C1 of rectifier bridge T, electric capacity C2, electricity
One fixing end of position device RP1, a fixing end of potentiometer RP2, the negative electrode of three end adjustable reference source P, three end adjustable references
The reference pole of source P, resistance R1, the contact K-1 of relay K and relay K, the other end connection electric capacity C1's of electric capacity C2 are another
End, another fixing end of another fixing end of resistance R2, resistance R3, potentiometer RP1, potentiometer RP2, audion V1 send out
The port 4 of emitter-base bandgap grading, display A and rectifier bridge T, the anode of three end adjustable reference source P connect the other end of resistance R3, potentiometer
The sliding end of RP1 connects the pin 1 of chip IC 1, and the sliding end of potentiometer RP2 connects the pin 3 of chip IC 2, and resistance R1's is another
The pin 1 of the pin 3 and chip IC 2 of one end connection chip IC 1, the pin 4 of chip IC 1 connect the anode of diode D1, two poles
The negative electrode and the base stage of audion V1 of the negative electrode connection diode D2 of pipe D1, the pin 4 of chip IC 2 connect the sun of diode D2
Pole, the other end of the collector connection relay K of audion V1, the other end connection of the contact K-1 of relay K and relay K
The other end of display A, the relay K are for the model of normally-closed contact relay, the chip IC 1 and chip IC 2
LM339。
2. a kind of computer display voltage protection circuit according to claim 1, it is characterised in that three end is adjustable
Model TL431 of a reference source P.
3. a kind of computer display voltage protection circuit according to claim 1, it is characterised in that the rectifier bridge T
The full bridge rectifier being made up of 4 IN4001 type diodes.
4. a kind of computer display voltage protection circuit according to claim 1, it is characterised in that the diode D1
Light emitting diode is with diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223300.1A CN106532630A (en) | 2016-12-27 | 2016-12-27 | Voltage protection circuit of computer display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223300.1A CN106532630A (en) | 2016-12-27 | 2016-12-27 | Voltage protection circuit of computer display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106532630A true CN106532630A (en) | 2017-03-22 |
Family
ID=58338410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611223300.1A Pending CN106532630A (en) | 2016-12-27 | 2016-12-27 | Voltage protection circuit of computer display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106532630A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069655A (en) * | 2017-06-06 | 2017-08-18 | 吉林省中赢高科技有限公司 | A kind of voltage protection circuit |
| CN107170175A (en) * | 2017-06-15 | 2017-09-15 | 合肥讯邦网络科技有限公司 | A kind of fire safety control system communicated based on Internet of Things |
| CN107861600A (en) * | 2017-11-21 | 2018-03-30 | 郑州天舜电子技术有限公司 | A kind of computer display power-supply controller of electric |
| CN108052192A (en) * | 2017-12-13 | 2018-05-18 | 天津大学 | Dual power supply voltage stabilizing computer motherboard charger |
| CN109103851A (en) * | 2018-10-29 | 2018-12-28 | 安徽云森物联网科技有限公司 | A kind of power interface protective device |
| CN109193574A (en) * | 2018-10-29 | 2019-01-11 | 安徽云森物联网科技有限公司 | A kind of AC power source adapter protective device |
| CN109245056A (en) * | 2018-10-29 | 2019-01-18 | 安徽云森物联网科技有限公司 | A kind of DC power source adapter protective device |
| CN110858712A (en) * | 2018-08-24 | 2020-03-03 | 绿星研发印度私人有限公司 | System for protecting solid state electronic devices from over-voltage and/or under-voltage conditions |
| CN112087837A (en) * | 2020-08-24 | 2020-12-15 | 韶关市益金农业有限公司 | Intermittent working discharge control circuit for high-voltage arc discharge type insecticidal lamp |
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| CN204719477U (en) * | 2015-06-15 | 2015-10-21 | 深圳市益佳通科技股份有限公司 | A kind of microcontroller power supply |
| CN204731556U (en) * | 2015-05-18 | 2015-10-28 | 梁翎肖 | A kind of sound equipment energy-saving control circuit |
| CN205051407U (en) * | 2015-09-25 | 2016-02-24 | 深圳市深超新能源科技有限公司 | Lithium batteries protects controller |
| CN205333724U (en) * | 2015-12-31 | 2016-06-22 | 苏州市计量测试研究所 | Stand -by power supply voltage detecting early warning circuit |
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2016
- 2016-12-27 CN CN201611223300.1A patent/CN106532630A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204731556U (en) * | 2015-05-18 | 2015-10-28 | 梁翎肖 | A kind of sound equipment energy-saving control circuit |
| CN204719477U (en) * | 2015-06-15 | 2015-10-21 | 深圳市益佳通科技股份有限公司 | A kind of microcontroller power supply |
| CN205051407U (en) * | 2015-09-25 | 2016-02-24 | 深圳市深超新能源科技有限公司 | Lithium batteries protects controller |
| CN205333724U (en) * | 2015-12-31 | 2016-06-22 | 苏州市计量测试研究所 | Stand -by power supply voltage detecting early warning circuit |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069655A (en) * | 2017-06-06 | 2017-08-18 | 吉林省中赢高科技有限公司 | A kind of voltage protection circuit |
| CN107069655B (en) * | 2017-06-06 | 2020-11-27 | 吉林省中赢高科技有限公司 | Voltage protection circuit |
| CN107170175A (en) * | 2017-06-15 | 2017-09-15 | 合肥讯邦网络科技有限公司 | A kind of fire safety control system communicated based on Internet of Things |
| CN107861600A (en) * | 2017-11-21 | 2018-03-30 | 郑州天舜电子技术有限公司 | A kind of computer display power-supply controller of electric |
| CN107861600B (en) * | 2017-11-21 | 2020-11-20 | 郑州天舜电子技术有限公司 | Computer display power supply controller |
| CN108052192A (en) * | 2017-12-13 | 2018-05-18 | 天津大学 | Dual power supply voltage stabilizing computer motherboard charger |
| CN110858712A (en) * | 2018-08-24 | 2020-03-03 | 绿星研发印度私人有限公司 | System for protecting solid state electronic devices from over-voltage and/or under-voltage conditions |
| CN109103851A (en) * | 2018-10-29 | 2018-12-28 | 安徽云森物联网科技有限公司 | A kind of power interface protective device |
| CN109193574A (en) * | 2018-10-29 | 2019-01-11 | 安徽云森物联网科技有限公司 | A kind of AC power source adapter protective device |
| CN109245056A (en) * | 2018-10-29 | 2019-01-18 | 安徽云森物联网科技有限公司 | A kind of DC power source adapter protective device |
| CN112087837A (en) * | 2020-08-24 | 2020-12-15 | 韶关市益金农业有限公司 | Intermittent working discharge control circuit for high-voltage arc discharge type insecticidal lamp |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |