CN206575133U - A kind of Programmable AC Power Source output short circuit protection circuit - Google Patents
A kind of Programmable AC Power Source output short circuit protection circuit Download PDFInfo
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- CN206575133U CN206575133U CN201720240764.7U CN201720240764U CN206575133U CN 206575133 U CN206575133 U CN 206575133U CN 201720240764 U CN201720240764 U CN 201720240764U CN 206575133 U CN206575133 U CN 206575133U
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Abstract
The utility model discloses a kind of Programmable AC Power Source output short circuit protection circuit, including input IN, input IN connections corresponding with switch S, the switch S electrical connections corresponding with circuit contact 1 and circuit contact 2, it is normally off between switch S and the circuit contact 1, the circuit contact 1 electrical connection corresponding with resistance R1 and triode Q1, the resistance R1 electrical connections corresponding with circuit contact b, the circuit contact b electrical connections corresponding with triode Q1, circuit contact b electrical connections also corresponding with relay K, contact A and contact B are provided with the relay K, contact A electrical connection corresponding with output end OUT, the contact B electrical connections corresponding with light-emitting alarm D.A kind of Programmable AC Power Source output short circuit protection circuit of the utility model can protection circuit and related electrical equipment to greatest extent, also overcome the problem of traditional protection circuit reliability is not high.
Description
Technical field
The utility model is related to short-circuit protection circuit field, more particularly to a kind of Programmable AC Power Source output short circuit protection
Circuit.
Background technology
Power supply short circuit（Short airauit）Refer to that in circuit, electric current is not passed through electrical appliance, is directly connected to power supply positive and negative
The two poles of the earth.Known according to Ohm's law I=U/R, due to the resistance very little of wire, electric current during power supply short circuit on circuit can be very big.
So big electric current, battery or other power supplys can not all be born, and power supply can be caused to damage；More seriously, because electric current
It is too big, it can raise the temperature of wire, fire is likely to cause when serious.
Short-circuit protection is one of protection of most critical in all kinds of circuits, when short trouble occurs in circuit system, and short circuit is protected
Protection circuit can quick starting protection in time, after short trouble is excluded, can system automatically terminate guard mode, be to evaluate system
System reliability, security and intelligent key factor.
Utility model content
In order to overcome defect of the prior art, there is provided a kind of Programmable AC Power Source output short circuit protection circuit.
The utility model is realized by following proposal：
A kind of Programmable AC Power Source output short circuit protection circuit, including input IN, the input IN are with switching S pairs
It should connect, the switch S electrical connections corresponding with circuit contact 1 and circuit contact 2, are normal between switch S and the circuit contact 1
Closed state, the circuit contact 1 electrical connection corresponding with resistance R1 and triode Q1, the resistance R1 electricity corresponding with circuit contact b
Connection, the circuit contact b electrical connections corresponding with triode Q1, circuit contact b electrical connections also corresponding with relay K, institute
State and contact A and contact B are provided with relay K, the contact A is corresponding with output end OUT to be electrically connected, the contact B and luminous report
Alert device D correspondences are electrically connected；
Another output end electrical connection corresponding with resistance R2 of the triode Q1, the resistance R2 is corresponding with circuit contact a
Connection, one end electrical connection corresponding with resistance R3 of the circuit contact a, Q2 pairs of the other end and the IGCT of the circuit contact a
It should electrically connect, one end electrical connection corresponding with relay K of the IGCT Q2, the other end correspondence of the IGCT Q2 is grounded,
Relay K electrical connections also corresponding with triode Q1.
The beneficial effects of the utility model are：
A kind of Programmable AC Power Source output short circuit protection circuit of the utility model can to greatest extent protection circuit and
Related electrical equipment, also overcomes the problem of traditional protection circuit reliability is not high.
Brief description of the drawings
Fig. 1 is a kind of structure chart of Programmable AC Power Source output short circuit protection circuit of the utility model.
Embodiment
The utility model is further illustrated with reference to Fig. 1 and specific embodiment：
A kind of Programmable AC Power Source output short circuit protection circuit, including input IN, the input IN are with switching S pairs
It should connect, the switch S electrical connections corresponding with circuit contact 1 and circuit contact 2, are normal between switch S and the circuit contact 1
Closed state, the circuit contact 1 electrical connection corresponding with resistance R1 and triode Q1, the resistance R1 electricity corresponding with circuit contact b
Connection, the circuit contact b electrical connections corresponding with triode Q1, circuit contact b electrical connections also corresponding with relay K, institute
State and contact A and contact B are provided with relay K, the contact A is corresponding with output end OUT to be electrically connected, the contact B and luminous report
Alert device D correspondences are electrically connected；
Another output end electrical connection corresponding with resistance R2 of the triode Q1, the resistance R2 is corresponding with circuit contact a
Connection, one end electrical connection corresponding with resistance R3 of the circuit contact a, Q2 pairs of the other end and the IGCT of the circuit contact a
It should electrically connect, one end electrical connection corresponding with relay K of the IGCT Q2, the other end correspondence of the IGCT Q2 is grounded,
Relay K electrical connections also corresponding with triode Q1.
Working process and principle of the present utility model are as follows：When external circuit normal work, switch S1 is dialled
Circuit contact 1（Switch between S and circuit contact 1 is normally off）, passed through again by resistance R1 from the input IN electric currents entered
Oversampling circuit contact b, then flows through and contact A and contact B is provided with relay K, the relay K, now the contact A in electrical equipment K
It is kept closed, and contact A electrical connection corresponding with output end OUT, now, circuit contact b points are high level, and triode Q1 is cut
Only it is not turned on, the coil of relay is flowed through without electric current.
Be the equal of that circuit contact b is connected with the earth terminal of circuit if now there is short circuit in output end OUT terminal,
Current potential is reduced, triode Q1 conductings, is had another outlet outflow of electric current by triode Q1, is sequentially passed through R2, R3 points of resistance
After pressure, resistance R3 circuit contact a voltages turn on IGCT Q2, and the coil that electric current flows through relay makes relay adhesive, touch
Point B is remained closed, and contact A disconnects, and contact B, which is remained closed, makes D1 turn on luminous alarm, while contact A, which disconnects, makes circuit output electricity
Stream is zero, is played a protective role.
If circuit will recover normal, need switch S to dial in circuit contact 2, make whole down circuitry.Relay touch
Point recovers extremely, after contact A point, then switch S is dialled in circuit contact 1, and circuit can be exported normally again.The utility model is a kind of
Programmable AC Power Source output short circuit protection circuit can protection circuit and related electrical equipment to greatest extent, also overcome
The problem of traditional protection circuit reliability is not high.
Although having done more detailed elaboration to the technical solution of the utility model and having enumerated, it will be appreciated that for
For those skilled in the art, modification is made to above-described embodiment or equivalent alternative solution is used, this skill to this area
Be for art personnel it is clear that without departing from the utility model spirit on the basis of these modifications or improvements, belong to
The scope being claimed in the utility model.
Claims (1)
1. a kind of Programmable AC Power Source output short circuit protection circuit, including input IN, it is characterised in that：The input IN
Connection corresponding with switch S, the switch S electrical connections corresponding with circuit contact 1 and circuit contact 2, the switch S and circuit contact
It is normally off between 1, the circuit contact 1 electrical connection corresponding with resistance R1 and triode Q1, the resistance R1 is touched with circuit
Point b correspondences are electrically connected, and the circuit contact b electrical connections corresponding with triode Q1, the circuit contact b is also corresponding with relay K
Contact A and contact B, contact A electrical connection corresponding with output end OUT, the contact B are provided with electrical connection, the relay K
Electrical connection corresponding with light-emitting alarm D；
Another output end electrical connection corresponding with resistance R2 of the triode Q1, the resistance R2 connections corresponding with circuit contact a,
One end electrical connection corresponding with resistance R3 of the circuit contact a, the other end of the circuit contact a is corresponding with IGCT Q2 to be electrically connected
Connect, one end of IGCT Q2 electrical connection corresponding with relay K, the other end correspondence of the IGCT Q2 is grounded, it is described after
Electrical equipment K electrical connections also corresponding with triode Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720240764.7U CN206575133U (en) | 2017-03-14 | 2017-03-14 | A kind of Programmable AC Power Source output short circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720240764.7U CN206575133U (en) | 2017-03-14 | 2017-03-14 | A kind of Programmable AC Power Source output short circuit protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206575133U true CN206575133U (en) | 2017-10-20 |
Family
ID=60054064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720240764.7U Expired - Fee Related CN206575133U (en) | 2017-03-14 | 2017-03-14 | A kind of Programmable AC Power Source output short circuit protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206575133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376831A (en) * | 2021-12-16 | 2022-04-22 | 中国人民解放军第三〇五医院 | Multifunctional integrated intelligent nursing vehicle based on 5G remote control |
-
2017
- 2017-03-14 CN CN201720240764.7U patent/CN206575133U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376831A (en) * | 2021-12-16 | 2022-04-22 | 中国人民解放军第三〇五医院 | Multifunctional integrated intelligent nursing vehicle based on 5G remote control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20210314 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |