CN108462156B - Overvoltage protection device - Google Patents
Overvoltage protection device Download PDFInfo
- Publication number
- CN108462156B CN108462156B CN201711488177.0A CN201711488177A CN108462156B CN 108462156 B CN108462156 B CN 108462156B CN 201711488177 A CN201711488177 A CN 201711488177A CN 108462156 B CN108462156 B CN 108462156B
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- voltage
- schmidt trigger
- diode
- circuit
- input terminal
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- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 239000013078 crystal Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract 3
- 239000003381 stabilizer Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an overvoltage protection device, which comprises a power circuit, a voltage detection circuit and a trigger circuit, wherein the circuit is used for providing a power supply, the voltage detection circuit is used for detecting the power supply voltage, a driving circuit is used for driving a relay to work so as to timely disconnect the power supply when overvoltage occurs, the power circuit comprises a bridge rectifier circuit V1 and a voltage stabilizer, the voltage detection circuit adopts six Schmidt triggers, the trigger circuit comprises a sixth resistor and a first triode which are connected with a sixth diode, the base electrode of the first triode is grounded through a fifth capacitor, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with the input end of the voltage stabilizer through a coil of the relay, and the two ends of the coil of the relay are connected with a ninth diode in parallel. The overvoltage protection device can timely disconnect the power supply of the electric equipment when overvoltage occurs, prevent the electric equipment from being damaged due to overhigh voltage, and ensure the safe and reliable work of the electric equipment.
Description
Technical field
The present invention relates to electrical equipment protection technique field more particularly to a kind of over-pressure safety devices.
Background technique
For most of electrical equipments, the voltage range of working power, which has, strictly to be limited, and ultra-voltage can be to equipment
Work causes to seriously affect, and causes equipment damage, serious or even will cause accident, thus in real time to the power supply of electrical equipment into
Row monitoring and protection, for guaranteeing that electrical equipment normal work is necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of industrial power protective devices, can occur in the power supply of electrical equipment super electric
The power supply of electrical equipment is disconnected in time when pressure, and is powered on automatically when restoring electricity, guarantees electrical equipment safely and reliably work
Make.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of over-pressure safety device, including power circuit, voltage detecting circuit and trigger circuit, the circuit is for providing
Power supply, voltage detecting circuit is for detecting supply voltage, and driving circuit is for driving relay to work, thus occurring
Power supply is disconnected in time when over-voltage；
The power circuit includes bridge rectifier and voltage-stablizer, and the input terminal of bridge rectifier connects power supply, bridge
First output end of formula rectification circuit is connected with the input terminal of voltage-stablizer, the second output terminal ground connection of bridge rectifier, bridge-type
First output end of rectification circuit is also grounded through first capacitor, the output end of voltage-stablizer through the second capacity earth, voltage-stablizer it is defeated
Outlet is connected with voltage detecting circuit；
The voltage detecting circuit includes six Schmidt triggers, wherein the input terminal of the first Schmidt trigger is through the
One diode ground connection, the input terminal of the first Schmidt trigger is connected through first resistor with the input terminal of voltage-stablizer, first apply it is close
The input terminal of special trigger is also grounded through the first potentiometer, and the input terminal of second Schmidt trigger is through second resistance and surely
The input terminal of depressor is connected, and the input terminal of the second Schmidt trigger is also grounded through the second potentiometer, the both ends of the second potentiometer
It is parallel with the second diode, the output end of the first Schmidt trigger is successively through 3rd resistor and the 4th diode and voltage-stablizer
Output end is connected, and the output end of the first Schmidt trigger is also connected through third diode with trigger circuit, the second Schmidt touching
The output end of hair device is connected with the input terminal of third Schmidt trigger, and the output end of third Schmidt trigger is successively through the 4th
Resistance and the 5th diode are connected with the output end of voltage-stablizer, the output end of third Schmidt trigger also through the 6th diode and
5th resistance is connected with the output end of voltage-stablizer, and the 6th diode is connected with the common end of the 5th resistance with trigger circuit, and the 6th
Diode is also connected through the 7th diode with the sliding end of third potentiometer with the common end of the 5th resistance, and the two of third potentiometer
End is parallel with the 4th Schmidt trigger, and the input terminal of the 4th Schmidt trigger is through third capacity earth, the 4th Schmidt touching
The output end of hair device is successively connected through the 5th Schmidt trigger and the 8th diode with the 6th Schmidt trigger, the 6th Shi Mi
The input terminal of special trigger is grounded through the 4th capacity earth, the output end of the 6th Schmidt trigger through the first crystal oscillator, and the 6th applies
The both ends of schmitt trigger are also parallel with the 4th potentiometer；
The trigger circuit includes the 6th resistance and the first triode being connected with the 6th diode, the base of the first triode
The 5th capacity earth of pole, the emitter ground connection of the first triode, the collector of the first triode is through the coil of relay and surely
The input terminal of depressor is connected, and the coil both ends of relay are parallel with the 9th diode.
Preferably, the voltage-stablizer uses LM7809 three terminal regulator, first Schmidt trigger to the 6th Shi Mi
Special trigger is all made of CD4584 Schmidt trigger.
Preferably, the 4th diode and the 5th diode are all made of light emitting diode
The present invention detects supply voltage by voltage detecting circuit, and drives relay work using trigger circuit
Make, in time disconnect the power supply of electrical equipment when over-voltage occurs, prevent electrical equipment since overtension damages,
Guarantee that electrical equipment safely and reliably works.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described embodiment
Only section Example of the invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel other all embodiments obtained without making creative work, belong to protection model of the invention
It encloses.
As shown in Figure 1, a kind of over-pressure safety device of the present invention, including power circuit, voltage detecting circuit and triggering
Circuit, circuit is for providing power supply, and voltage detecting circuit is for detecting supply voltage, and driving circuit is for driving relay
Device work, in time disconnect power supply when over-voltage occurs.
Power circuit includes bridge rectifier V1 and voltage-stablizer IC1, and in the present embodiment, voltage-stablizer IC1 is used
The input terminal of LM7809 three terminal regulator, bridge rectifier V1 connects power supply Vin, the first output end of bridge rectifier V1
It is connected with the input terminal of voltage-stablizer IC1, the second output terminal of bridge rectifier V1 is grounded, and the first of bridge rectifier V1 is defeated
Outlet is also grounded through first capacitor C1, and the output end of voltage-stablizer IC1 is grounded through the second capacitor C2, the output end of voltage-stablizer IC1 with
Voltage detecting circuit is connected.
Voltage detecting circuit includes six Schmidt triggers, and in the present embodiment, six Schmidt triggers are all made of
CD4584 Schmidt trigger, wherein the input terminal of the first Schmidt trigger D1 is grounded through first diode VD1, first apply it is close
The input terminal of special trigger D1 is connected through first resistor R1 with the input terminal of voltage-stablizer IC1, and the first Schmidt trigger D1's is defeated
Enter end to be also grounded through the first potentiometer RP1；The input terminal of second Schmidt trigger D2 is through second resistance R2's and voltage-stablizer IC1
Input terminal is connected, and the input terminal of the second Schmidt trigger D2 is also grounded through the second potentiometer RP2, and the two of the second potentiometer RP2
End is parallel with the second diode VD2, and the output end of the first Schmidt trigger D1 is successively through 3rd resistor R3 and the 4th diode
VD4 is connected with the output end of voltage-stablizer IC1, and the output end of the first Schmidt trigger D1 is also through third diode VD3 and triggering
Circuit is connected, and the output end of the second Schmidt trigger D2 is connected with the input terminal of third Schmidt trigger D3, and third is applied close
The output end of special trigger D3 is successively connected through the 4th resistance R4 and the 5th diode VD5 with the output end of voltage-stablizer IC1, third
The output end of Schmidt trigger D3 is also connected through the 6th diode VD6 and the 5th resistance R5 with the output end of voltage-stablizer IC1, the
Six diode VD6 are connected with the common end of the 5th resistance R5 with trigger circuit, and the 6th diode VD6 and the 5th resistance R5's is public
End is also connected through the 7th diode VD7 with the sliding end of third potentiometer RP3, and the both ends of third potentiometer RP3 are parallel with the 4th
The input terminal of Schmidt trigger D4, the 4th Schmidt trigger D4 are grounded through third capacitor C3, the 4th Schmidt trigger D4
Output end be successively connected through the 5th Schmidt trigger D5 and the 8th diode VD8 with the 6th Schmidt trigger D6, the 6th
The input terminal of Schmidt trigger D6 is grounded through the 4th capacitor C4, and the output end of the 6th Schmidt trigger D6 is through the first crystal oscillator J1
Ground connection, the both ends of the 6th Schmidt trigger D6 are also parallel with the 4th potentiometer RP4.
Trigger circuit includes and the 6th diode VD6 the 6th resistance R6 being connected and the first triode VT1, the first triode
The base stage of VT1 is grounded through the 5th capacitor C5, the emitter of the first triode VT1 ground connection, the collector of the first triode VT1 pass through after
The coil of electric appliance K is connected with the input terminal of voltage-stablizer IC1, and the coil both ends of relay K are parallel with the 9th diode VD9, relay
The normally-closed contact of device is connected with the power supply of electrical equipment.
In the present embodiment, the 4th diode VD4 and the 5th diode VD5 are all made of light emitting diode, occur in power supply
The 4th diode VD4 and the 5th diode VD5 shines when over-voltage, reminds staff to overhaul in time, while by electrical equipment
Power supply disconnects, and prevents electrical equipment since overtension damages, and guarantees that electrical equipment safely and reliably works.
Claims (3)
1. a kind of over-pressure safety device, it is characterised in that: including power circuit, voltage detecting circuit and trigger circuit, the electricity
Source circuit is for providing power supply, and voltage detecting circuit is for detecting supply voltage, and driving circuit is for driving relay
Work, in time disconnect power supply when over-voltage occurs；
The power circuit includes bridge rectifier and voltage-stablizer, and the input terminal of bridge rectifier connects power supply, and bridge-type is whole
First output end of current circuit is connected with the input terminal of voltage-stablizer, the second output terminal ground connection of bridge rectifier, bridge rectifier
First output end of circuit is also grounded through first capacitor, and the output end of voltage-stablizer is through the second capacity earth, the output end of voltage-stablizer
It is connected with voltage detecting circuit；
The voltage detecting circuit includes six Schmidt triggers, wherein the input terminal of the first Schmidt trigger is through the one or two
Pole pipe ground connection, the input terminal of the first Schmidt trigger are connected through first resistor with the input terminal of voltage-stablizer, the first Schmidt touching
The input terminal for sending out device is also grounded through the first potentiometer, and the input terminal of the second Schmidt trigger is defeated through second resistance and voltage-stablizer
Enter end to be connected, the input terminal of the second Schmidt trigger is also grounded through the second potentiometer, and the both ends of the second potentiometer are parallel with the
Two diodes, the output end of the first Schmidt trigger successively output end phase through 3rd resistor and the 4th diode and voltage-stablizer
Even, the output end of the first Schmidt trigger is also connected through third diode with trigger circuit, the second Schmidt trigger it is defeated
Outlet is connected with the input terminal of third Schmidt trigger, and the output end of third Schmidt trigger is successively through the 4th resistance and
Five diodes are connected with the output end of voltage-stablizer, and the output end of third Schmidt trigger is also through the 6th diode and the 5th resistance
Be connected with the output end of voltage-stablizer, the 6th diode is connected with the common end of the 5th resistance with trigger circuit, the 6th diode with
The common end of 5th resistance is also connected through the 7th diode with the sliding end of third potentiometer, and the both ends of third potentiometer are parallel with
4th Schmidt trigger, the input terminal of the 4th Schmidt trigger through third capacity earth, the 4th Schmidt trigger it is defeated
Outlet is successively connected through the 5th Schmidt trigger and the 8th diode with the 6th Schmidt trigger, the 6th Schmidt trigger
Input terminal through the 4th capacity earth, the output end of the 6th Schmidt trigger is grounded through the first crystal oscillator, the 6th schmidt trigger
The both ends of device are also parallel with the 4th potentiometer；
The trigger circuit includes the 6th resistance and the first triode being connected with the 6th diode, the base stage warp of the first triode
5th capacity earth, the emitter ground connection of the first triode, the collector of the first triode is through the coil of relay and voltage-stablizer
Input terminal be connected, the coil both ends of relay are parallel with the 9th diode.
2. a kind of over-pressure safety device as described in claim 1, it is characterised in that: the voltage-stablizer is steady using tri- end LM7809
Depressor, first Schmidt trigger to the 6th Schmidt trigger are all made of CD4584 Schmidt trigger.
3. a kind of over-pressure safety device as claimed in claim 2, it is characterised in that: the 4th diode and the 5th diode
It is all made of light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711488177.0A CN108462156B (en) | 2017-12-29 | 2017-12-29 | Overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711488177.0A CN108462156B (en) | 2017-12-29 | 2017-12-29 | Overvoltage protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108462156A CN108462156A (en) | 2018-08-28 |
| CN108462156B true CN108462156B (en) | 2019-07-02 |
Family
ID=63220612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711488177.0A Active CN108462156B (en) | 2017-12-29 | 2017-12-29 | Overvoltage protection device |
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| Country | Link |
|---|---|
| CN (1) | CN108462156B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2094830U (en) * | 1991-05-13 | 1992-01-29 | 王睢秦 | Electricity-saving protector for motor |
| CN201584761U (en) * | 2009-12-29 | 2010-09-15 | 天津电气传动设计研究所 | Overvoltage detection circuit |
| CN104682346A (en) * | 2013-12-03 | 2015-06-03 | 成都熊谷加世电器有限公司 | Rotation monitoring circuit of full-automatic processing equipment for welding cables |
| CN204464974U (en) * | 2015-02-09 | 2015-07-08 | 安徽长龙电气集团有限公司 | A kind of power distribution cabinet low-voltage circuit |
| CN104934795A (en) * | 2014-03-19 | 2015-09-23 | 天津华辰晟宏科技有限公司 | Office safety socket with overvoltage and under-voltage functions |
-
2017
- 2017-12-29 CN CN201711488177.0A patent/CN108462156B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2094830U (en) * | 1991-05-13 | 1992-01-29 | 王睢秦 | Electricity-saving protector for motor |
| CN201584761U (en) * | 2009-12-29 | 2010-09-15 | 天津电气传动设计研究所 | Overvoltage detection circuit |
| CN104682346A (en) * | 2013-12-03 | 2015-06-03 | 成都熊谷加世电器有限公司 | Rotation monitoring circuit of full-automatic processing equipment for welding cables |
| CN104934795A (en) * | 2014-03-19 | 2015-09-23 | 天津华辰晟宏科技有限公司 | Office safety socket with overvoltage and under-voltage functions |
| CN204464974U (en) * | 2015-02-09 | 2015-07-08 | 安徽长龙电气集团有限公司 | A kind of power distribution cabinet low-voltage circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108462156A (en) | 2018-08-28 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190605 Address after: 518000 electric power dispatching and communication building, 4020 Shennan East Road, Luohu District, Shenzhen, Guangdong Applicant after: Shenzhen Power Supply Co.,Ltd. Applicant after: SHENZHEN COMTOP INFORMATION TECHNOLOGY Co.,Ltd. Address before: 450016 No. 1356 Pioneering Center, Sixth Avenue, Hanghai East Road, Zhengzhou Economic and Technological Development Zone, Henan Province Applicant before: HENAN BEIRUI ELECTRONIC TECHNOLOGY CO.,LTD. |
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| GR01 | Patent grant |