CN208352960U - A kind of power supply circuit with multiple protection functions - Google Patents
A kind of power supply circuit with multiple protection functions Download PDFInfo
- Publication number
- CN208352960U CN208352960U CN201820390140.8U CN201820390140U CN208352960U CN 208352960 U CN208352960 U CN 208352960U CN 201820390140 U CN201820390140 U CN 201820390140U CN 208352960 U CN208352960 U CN 208352960U
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- resistance
- triode
- diode
- relay
- power supply
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- 239000003990 capacitor Substances 0.000 claims description 13
- 239000007795 chemical reaction product Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 206010034703 Perseveration Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model discloses a kind of power supply circuits with multiple protection functions; including relay K, diode D3, triode V2 and unidirectional thyristor Q1; the contact K-1 of the cathode connection resistance R4 and relay K of the diode D3; the other end of the contact K-1 of relay K connects power supply VCC; the anode of diode D3 connects the input terminal of resistance R3, resistance R5 and NOT gate U1, the base stage of the other end connecting triode V1 of resistance R3.There is the utility model the power supply circuit of multiple protection functions to form voltage detector using using zener diode and conventional, electric-resistance; automatically the discharge scenario of power supply can be monitored; it can be automatically disconnected the circuit when encountering under-voltage electric power thus supplied; protect load from under-voltage damage; and it is equipped with short-circuit protection function; short-circuit protection is realized by relay and triode, while also having the function of lamplight pointing.
Description
Technical field
The utility model relates to a kind of power supply circuit, specifically a kind of power supply circuit with multiple protection functions.
Background technique
With the continuous improvement of people's living standards, electronic equipment has become essential a part in life, especially
It is that various household electrical appliance bring great convenience to people's lives, work, and this kind of electronic device has required an essence
Spend DC power supply higher, applied widely.The mobile power source of existing market is many kinds of, and mid and low-end products are especially more, though
Right low-end product has the advantage of price with respect to high-end product, but quality often complies with one's wishes not to the utmost, especially to some special
Load, such as LED light, direct current generator are under-voltage caused by brownout and short-circuit may directly burn electrical equipment.
Utility model content
The purpose of this utility model is to provide a kind of power supply circuits with multiple protection functions, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the utility model provides the following technical solutions:
A kind of power supply circuit with multiple protection functions, including relay K, diode D3, triode V2 and unidirectional crystalline substance
The contact K-1 of the cathode connection resistance R4 and relay K of brake tube Q1, the diode D3, the contact K-1's of relay K is another
The anode of end connection power supply VCC, diode D3 connect the input terminal of resistance R3, resistance R5 and NOT gate U1, the other end of resistance R3
The base stage of connecting triode V1, the other end, resistance R1, resistance R2, the resistance R7, electricity of the collector connection resistance R4 of triode V1
Hinder R8 and capacitor C2, the anode of the other end connection unidirectional thyristor Q1 of resistance R7, the unidirectional brilliant lock of the output end connection of NOT gate U1
The control electrode of pipe Q1, the cathode of cathode connection the resistance R6 and unidirectional thyristor Q2 of unidirectional thyristor Q1, the other end of resistance R5
The other end and ground of resistance R6 are connected, the emitter of triode V1 connects capacitor C1, the unidirectional brilliant lock of the other end connection of capacitor C1
The control electrode of pipe Q2, the anode of the other end connection diode D1 of resistance R2, the cathode of diode D1 connect unidirectional thyristor Q2
Anode, the other end of relay K, the other end of capacitor C2 and load P, load P the other end connection resistance R1 the other end
Resistance R8, the collector connection relay K of triode V2 are connected with the emitter of the base stage of triode V2, triode V2.
As a preferred embodiment of the present invention: the diode D1 is light emitting diode.
As a preferred embodiment of the present invention: the diode D3 is zener diode.
As a preferred embodiment of the present invention: the relay K is normally-closed contact relay.
As a preferred embodiment of the present invention: the triode V1 is N-type triode, and triode V2 is p-type triode.
Compared with prior art, the utility model has the beneficial effects that the utility model has the confession of multiple protection functions
Circuit, which is used, forms voltage detector using zener diode and conventional, electric-resistance, the discharge scenario to power supply can carry out automatically
Monitoring, can automatically disconnect the circuit when encountering under-voltage electric power thus supplied, protect load from under-voltage damage, and be equipped with short-circuit protection function
Can, short-circuit protection is realized by relay and triode, while also having the function of lamplight pointing.
Detailed description of the invention
Fig. 1 is the circuit diagram of the power supply circuit with multiple protection functions.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of power supply circuit with multiple protection functions, including relay K, diode D3, triode
The cathode of V2 and unidirectional thyristor Q1, the diode D3 connect the contact K-1 of resistance R4 and relay K, the contact of relay K
The other end of K-1 connects power supply VCC, and the anode of diode D3 connects the input terminal of resistance R3, resistance R5 and NOT gate U1, resistance R3
Other end connecting triode V1 base stage, the collector connection other end of resistance R4 of triode V1, resistance R1, resistance R2,
Resistance R7, resistance R8 and capacitor C2, the anode of the other end connection unidirectional thyristor Q1 of resistance R7, the output end connection of NOT gate U1
The control electrode of unidirectional thyristor Q1, the cathode of cathode connection the resistance R6 and unidirectional thyristor Q2 of unidirectional thyristor Q1, resistance R5
Other end connection resistance R6 the other end and ground, the emitter of triode V1 connects capacitor C1, the other end connection of capacitor C1
The control electrode of unidirectional thyristor Q2, the anode of the other end connection diode D1 of resistance R2, the cathode connection of diode D1 are unidirectional
The anode of thyristor Q2, the other end of relay K, the other end of capacitor C2 and load P load the other end connection resistance R1 of P
The other end and triode V2 base stage, the emitter of triode V2 connects resistance R8, and the collector of triode V2 connects relay
Device K.
Diode D1 is light emitting diode.Diode D3 is zener diode.Relay K is normally-closed contact relay.Three
Pole pipe V1 is N-type triode, and triode V2 is p-type triode.
The working principle of the utility model is: K-1 is normally closed since relay K is normally-closed contact relay, work as input
When the end voltage of voltage VCC is more than rated value, V1 is connected in the breakdown conducting of D3, and the high level of V1 emitter output is through C1
Triggering level is provided for the control electrode of Q2, Q2 is connected, the input terminal of NOT gate U1 is high level at this time, and output end is low electricity
It is flat, therefore Q1 is not turned on, the electric loop between VCC and load P is connected.At this point, D1 is lighted.
When the end voltage of battery E is down to rated value or less, D3 cut-off makes the reverse-biased cut-off of V1, U1 input terminal switchs to height
Level, unidirectional thyristor Q1 conducting end Q2 because cathode moment is plus backward voltage, by the power supply between VCC and load P
Access cutting.D1 extinguishes simultaneously, and D2 is lighted, and indicates the undertension of input voltage VCC.
When loading normal, since the base voltage of p-type triode V2 is higher, principle is connected according to it, V2 is not turned at this time,
Relay K must not electricity, when load P there are short-circuit conditions when, since the base stage of triode V2 is short-circuited, voltage reduce, V2 because
This and be connected, relay K be powered, contact K-1 disconnect, achieve the purpose that short-circuit protection, the charging/discharging function of capacitor C2 can
Prevent the perseveration of relay K.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of power supply circuit with multiple protection functions, including relay K, diode D3, triode V2 and unidirectional brilliant lock
Pipe Q1, which is characterized in that the contact K-1 of the cathode connection resistance R4 and relay K of the diode D3, the contact of relay K
The other end of K-1 connects power supply VCC, and the anode of diode D3 connects the input terminal of resistance R3, resistance R5 and NOT gate U1, resistance R3
Other end connecting triode V1 base stage, the collector connection other end of resistance R4 of triode V1, resistance R1, resistance R2,
Resistance R7, resistance R8 and capacitor C2, the anode of the other end connection unidirectional thyristor Q1 of resistance R7, the output end connection of NOT gate U1
The control electrode of unidirectional thyristor Q1, the cathode of cathode connection the resistance R6 and unidirectional thyristor Q2 of unidirectional thyristor Q1, resistance R5
Other end connection resistance R6 the other end and ground, the emitter of triode V1 connects capacitor C1, the other end connection of capacitor C1
The control electrode of unidirectional thyristor Q2, the anode of the other end connection diode D1 of resistance R2, the cathode connection of diode D1 are unidirectional
The anode of thyristor Q2, the other end of relay K, the other end of capacitor C2 and load P load the other end connection resistance R1 of P
The other end and triode V2 base stage, the emitter of triode V2 connects resistance R8, and the collector of triode V2 connects relay
Device K.
2. a kind of power supply circuit with multiple protection functions according to claim 1, which is characterized in that the diode
D1 is light emitting diode.
3. a kind of power supply circuit with multiple protection functions according to claim 1, which is characterized in that the diode
D3 is zener diode.
4. a kind of power supply circuit with multiple protection functions according to claim 1, which is characterized in that the relay
K is normally-closed contact relay.
5. a kind of power supply circuit with multiple protection functions according to claim 1, which is characterized in that the triode
V1 is N-type triode, and triode V2 is p-type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820390140.8U CN208352960U (en) | 2018-03-22 | 2018-03-22 | A kind of power supply circuit with multiple protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820390140.8U CN208352960U (en) | 2018-03-22 | 2018-03-22 | A kind of power supply circuit with multiple protection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208352960U true CN208352960U (en) | 2019-01-08 |
Family
ID=64885254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820390140.8U Expired - Fee Related CN208352960U (en) | 2018-03-22 | 2018-03-22 | A kind of power supply circuit with multiple protection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208352960U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432530A (en) * | 2020-04-27 | 2020-07-17 | 山东旭程照明科技有限公司 | Intelligent control device for preventing vapor fog electric shock lamp |
| CN111968260A (en) * | 2020-06-04 | 2020-11-20 | 深圳市中福信息科技有限公司 | Internet of things attendance management terminal based on face recognition and facial thermal imaging temperature measurement |
| CN115207880A (en) * | 2022-08-09 | 2022-10-18 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
-
2018
- 2018-03-22 CN CN201820390140.8U patent/CN208352960U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432530A (en) * | 2020-04-27 | 2020-07-17 | 山东旭程照明科技有限公司 | Intelligent control device for preventing vapor fog electric shock lamp |
| CN111968260A (en) * | 2020-06-04 | 2020-11-20 | 深圳市中福信息科技有限公司 | Internet of things attendance management terminal based on face recognition and facial thermal imaging temperature measurement |
| CN115207880A (en) * | 2022-08-09 | 2022-10-18 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
| CN115207880B (en) * | 2022-08-09 | 2023-12-19 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190108 Termination date: 20210322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |