CN108199343A - A kind of apparatus for protecting power supply - Google Patents
A kind of apparatus for protecting power supply Download PDFInfo
- Publication number
- CN108199343A CN108199343A CN201711478345.8A CN201711478345A CN108199343A CN 108199343 A CN108199343 A CN 108199343A CN 201711478345 A CN201711478345 A CN 201711478345A CN 108199343 A CN108199343 A CN 108199343A
- Authority
- CN
- China
- Prior art keywords
- nand gate
- output terminal
- diode
- capacitance
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- 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
-
- 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
- H02H3/24—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 undervoltage or no-voltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
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- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of apparatus for protecting power supply,Including voltage detecting circuit,Driving circuit and delay circuit,Voltage detecting circuit is used to be detected the operating voltage of electrical equipment,Driving circuit is used to that relay to be driven to work,So as to which the power supply of electrical equipment be disconnected in time when occurring over-pressed or under-voltage,Delay circuit is used for the delayed startup when restoring electricity,Voltage detecting circuit includes four NAND gates,First potentiometer and the second potentiometer,The output terminal of voltage detecting circuit is connected respectively at driving circuit with delay circuit,Driving circuit includes the 7th NAND gate,8th NAND gate and the first triode,Delay circuit, which includes the 4th NAND gate and the 5th NAND gate present invention, in time to be disconnected the power supply of electrical equipment when ultra-voltage and under-voltage occur for the power supply of electrical equipment,And it is powered on automatically when restoring electricity,Ensure that equipment safety reliably works.
Description
Technical field
The present invention relates to electrical equipment protection technique field more particularly to a kind of apparatus for protecting power supply.
Background technology
For most of electrical equipments, the voltage range of working power, which has, strictly to be limited, ultra-voltage or under-voltage pair
The work of equipment can all cause to seriously affect, and cause equipment damage, serious or even can cause the accident, therefore electricity consumption is set in real time
Standby power supply is monitored and protects, for ensureing that electrical equipment normal work is necessary.
Invention content
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 under-voltage, and is powered on automatically when restoring electricity, ensures electrical equipment safety
Reliably work.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of apparatus for protecting power supply, including voltage detecting circuit, driving circuit and delay circuit, the voltage detecting circuit includes
First NAND gate, the second NAND gate, third NAND gate and the 4th NAND gate, the first input end of the first NAND gate and the second output
Sliding end with the first potentiometer is held to be connected, the both ends of the first potentiometer are parallel with the first capacitance, and the one of first capacitance
End ground connection, the other end of the first capacitance connect positive pole through first resistor and the first diode successively, the first NAND gate it is defeated
Outlet is connected with the first input end of the second NAND gate, the second input terminal of the second NAND gate and the first input of third NAND gate
End is connected, and the first input end of third NAND gate is connected with the sliding end of the second potentiometer, and the second potentiometer is connected in parallel on the first electricity
Position device both ends, the second input terminal of the third NAND gate are connected with the first input end of the second NAND gate, the second NAND gate
The input terminal of output terminal and the output terminal of third NAND gate respectively with the 4th NAND gate is connected, the output terminal difference of the 4th NAND gate
It is connected with driving circuit and delay circuit；
The delay circuit is connected including the 5th NAND gate with the 6th NAND gate, and the first input end of the 5th NAND gate is through the second electricity
Resistance is connected with the output terminal of the 4th NAND gate, and second resistance both ends are parallel with the second diode, the first input of the 5th NAND gate
Also through the second capacitance and ground connection, the second input terminal of the 5th NAND gate is connected with the output terminal of the 6th NAND gate at end, the 5th with it is non-
The output terminal of door is connected through third capacitance with the input terminal of the 6th NAND gate, and the input terminal of the 6th NAND gate also connects through 3rd resistor
Ground, the output terminal of the 6th NAND gate are connected with driving circuit；
The driving circuit includes the 7th NAND gate, the 8th NAND gate and the first triode, the first input end of the 7th NAND gate
It is connected through third diode with the output terminal of the 6th NAND gate, the first input end of the 7th NAND gate is successively through the 4th resistance,
Four diodes and the 4th capacitance connection positive pole, the 4th capacitance both ends are parallel with the 5th resistance, and the second of the 7th NAND gate is defeated
Enter end through the 5th diode with the output terminal of the 4th NAND gate to be connected, the second input terminal of the 7th NAND gate also through the 6th resistance and
4th diode is connected, and the output terminal of the 7th NAND gate is successively through the 8th NAND gate and the 7th resistance and the first triode
Base stage is connected, the emitter ground connection of the first triode, coil and fourth diode of the collector through relay of the first triode
It is connected, the coil both ends of relay are parallel with the 6th diode, the power supply electricity of normally opened contact series connection with the load of the relay
On the road.
Preferably, first NAND gate to the 8th NAND gate uses CD4011 NAND gates.
The present invention is detected the operating voltage of electrical equipment by voltage detecting circuit, and is driven using driving circuit
Relay works, and so as in time disconnect the power supply of electrical equipment when occurring over-pressed or under-voltage, prevents electrical equipment due to electricity
Press it is too high or too low caused by damage；The invention also includes delay circuit, the delayed startup when restoring electricity is prevented due to restoring
Voltage dithering causes electrical equipment to damage during power supply, ensures that electrical equipment safely and reliably works.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific embodiment
Technical scheme 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
Other all embodiments that art personnel are obtained under the premise of creative work is not made belong to the protection model of the present invention
It encloses.
As shown in Figure 1, the present invention provides a kind of apparatus for protecting power supply, including voltage detecting circuit, driving circuit and prolong
When circuit, voltage detecting circuit is for being detected the operating voltage of electrical equipment, and driving circuit is for driving relay work
Make, so as in time disconnect the power supply of electrical equipment when occurring over-pressed or under-voltage, delay circuit is used in the time delay that restores electricity
Shi Qidong.
Voltage detecting circuit includes the first NAND gate D1, the second NAND gate D2, third NAND gate D3 and the 4th NAND gate D4,
Sliding end of the first input end and second output terminal of first NAND gate D1 with the first potentiometer RP1 is connected, the first potentiometer
The both ends of RP1 are parallel with one end ground connection of the first capacitance C1, the first capacitance C1, and the other end of the first capacitance C1 is successively through the first electricity
R1 and the first diode VD1 connection positive poles VCC is hindered, the first of the output terminal of the first NAND gate D1 and the second NAND gate D2 is defeated
Enter end to be connected, the second input terminal of the second NAND gate D2 is connected with the first input end of third NAND gate D3, third NAND gate D3
First input end be connected with the sliding end of the second potentiometer RP2, the second potentiometer RP2 is connected in parallel on the first potentiometer RP1 both ends,
The second input terminal of third NAND gate D3 is connected with the first input end of the second NAND gate D2, the output terminal of the second NAND gate D2 and
Input terminal of the output terminal of third NAND gate D3 respectively with the 4th NAND gate D4 is connected, the output terminal of the 4th NAND gate D4 respectively with
Driving circuit is connected with delay circuit.
Delay circuit is connected including the 5th NAND gate D5 and the 6th NAND gate D6, the first input end warp of the 5th NAND gate D5
Second resistance R2 is connected with the output terminal of the 4th NAND gate D4, and second resistance R2 both ends are parallel with the second diode VD2, the 5th with
The first input end of NOT gate D5 is also through the second capacitance C2 and ground connection, the second input terminal and the 6th NAND gate D6 of the 5th NAND gate D5
Output terminal be connected, the output terminal of the 5th NAND gate D5 is connected through third capacitance C3 with the input terminal of the 6th NAND gate D6, the 6th
The input terminal of NAND gate D6 is also grounded through 3rd resistor R3, and the output terminal of the 6th NAND gate D6 is connected with driving circuit.
Driving circuit includes the 7th NAND gate D7, the 8th NAND gate D8 and the first triode VT1, and the of the 7th NAND gate D7
One input terminal is connected through third diode VD3 with the output terminal of the 6th NAND gate D6, the first input end of the 7th NAND gate D7 according to
It is secondary through the 4th resistance R4, the 4th diode VD4 and the 4th capacitance C4 connection positive pole VCC, the 4th capacitance C4 both ends are parallel with
The second input terminal of 5th resistance R5, the 7th NAND gate D7 are connected through the 5th diode VD5 with the output terminal of the 4th NAND gate D4,
The second input terminal of 7th NAND gate D7 is also connected through the 6th resistance R6 with the 4th diode VD4, the output of the 7th NAND gate D7
End is connected successively through the 8th NAND gate D8 and the 7th resistance R7 with the base stage of the first triode VT1, the transmitting of the first triode VT1
Pole is grounded, and coil of the collector through relay K of the first triode VT1 is connected with the 4th diode, the coil both ends of relay K
Be parallel with the 6th diode VD6, the normally opened contact series connection of relay K on the power circuit of load.
In the present embodiment, the first NAND gate D1 to the 8th NAND gate D8 uses CD4011 NAND gates.
The present invention is detected the operating voltage of electrical equipment by voltage detecting circuit, and is driven using driving circuit
Relay works, and so as in time disconnect the power supply of electrical equipment when occurring over-pressed or under-voltage, prevents electrical equipment due to electricity
Press it is too high or too low caused by damage；The invention also includes delay circuit, the delayed startup when restoring electricity is prevented due to restoring
Voltage dithering causes electrical equipment to damage during power supply, ensures that electrical equipment safely and reliably works.
Claims (2)
1. a kind of apparatus for protecting power supply, it is characterised in that：Including voltage detecting circuit, driving circuit and delay circuit, the electricity
Detection circuit is pressed to include the first NAND gate, the second NAND gate, third NAND gate and the 4th NAND gate, the first of the first NAND gate is defeated
Enter the sliding end of end and second output terminal with the first potentiometer to be connected, the both ends of the first potentiometer are parallel with the first capacitance, institute
One end ground connection of the first capacitance is stated, the other end of the first capacitance connects positive pole through first resistor and the first diode successively,
The output terminal of first NAND gate is connected with the first input end of the second NAND gate, the second input terminal of the second NAND gate and third with
The first input end of NOT gate is connected, and the first input end of third NAND gate is connected with the sliding end of the second potentiometer, the second current potential
Device is connected in parallel on the first potentiometer both ends, the second input terminal of the third NAND gate and the first input end phase of the second NAND gate
Even, the input terminal of the output terminal of the second NAND gate and the output terminal of third NAND gate respectively with the 4th NAND gate is connected, the 4th with
The output terminal of NOT gate is connected respectively with driving circuit and delay circuit；
The delay circuit is connected including the 5th NAND gate with the 6th NAND gate, and the first input end of the 5th NAND gate is through the second electricity
Resistance is connected with the output terminal of the 4th NAND gate, and second resistance both ends are parallel with the second diode, the first input of the 5th NAND gate
Also through the second capacitance and ground connection, the second input terminal of the 5th NAND gate is connected with the output terminal of the 6th NAND gate at end, the 5th with it is non-
The output terminal of door is connected through third capacitance with the input terminal of the 6th NAND gate, and the input terminal of the 6th NAND gate also connects through 3rd resistor
Ground, the output terminal of the 6th NAND gate are connected with driving circuit；
The driving circuit includes the 7th NAND gate, the 8th NAND gate and the first triode, the first input end of the 7th NAND gate
It is connected through third diode with the output terminal of the 6th NAND gate, the first input end of the 7th NAND gate is successively through the 4th resistance,
Four diodes and the 4th capacitance connection positive pole, the 4th capacitance both ends are parallel with the 5th resistance, and the second of the 7th NAND gate is defeated
Enter end through the 5th diode with the output terminal of the 4th NAND gate to be connected, the second input terminal of the 7th NAND gate also through the 6th resistance and
4th diode is connected, and the output terminal of the 7th NAND gate is successively through the 8th NAND gate and the 7th resistance and the first triode
Base stage is connected, the emitter ground connection of the first triode, coil and fourth diode of the collector through relay of the first triode
It is connected, the coil both ends of relay are parallel with the 6th diode, the power supply electricity of normally opened contact series connection with the load of the relay
On the road.
2. a kind of apparatus for protecting power supply as described in claim 1, it is characterised in that：First NAND gate is to the 8th NAND gate
Use CD4011 NAND gates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478345.8A CN108199343A (en) | 2017-12-29 | 2017-12-29 | A kind of apparatus for protecting power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478345.8A CN108199343A (en) | 2017-12-29 | 2017-12-29 | A kind of apparatus for protecting power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108199343A true CN108199343A (en) | 2018-06-22 |
Family
ID=62586536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711478345.8A Withdrawn CN108199343A (en) | 2017-12-29 | 2017-12-29 | A kind of apparatus for protecting power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108199343A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203301123U (en) * | 2013-06-26 | 2013-11-20 | 成都昊地科技有限责任公司 | Overvoltage and undervoltage detection and delay protection circuit |
| CN104253409A (en) * | 2013-06-26 | 2014-12-31 | 成都昊地科技有限责任公司 | Exceeding or lacking voltage detection and delaytime protection circuit |
| CN205594363U (en) * | 2016-03-21 | 2016-09-21 | 吴辉进 | Voltage sample controller circuit |
| CN205666812U (en) * | 2016-01-27 | 2016-10-26 | 天津迪瓦靳普科技有限公司 | Timer circuit |
-
2017
- 2017-12-29 CN CN201711478345.8A patent/CN108199343A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203301123U (en) * | 2013-06-26 | 2013-11-20 | 成都昊地科技有限责任公司 | Overvoltage and undervoltage detection and delay protection circuit |
| CN104253409A (en) * | 2013-06-26 | 2014-12-31 | 成都昊地科技有限责任公司 | Exceeding or lacking voltage detection and delaytime protection circuit |
| CN205666812U (en) * | 2016-01-27 | 2016-10-26 | 天津迪瓦靳普科技有限公司 | Timer circuit |
| CN205594363U (en) * | 2016-03-21 | 2016-09-21 | 吴辉进 | Voltage sample controller circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180622 |
|
| WW01 | Invention patent application withdrawn after publication |