CN206506275U - A kind of Self-recover overvoltage-undervoltage protector power cut detection circuit - Google Patents
A kind of Self-recover overvoltage-undervoltage protector power cut detection circuit Download PDFInfo
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- CN206506275U CN206506275U CN201720192368.1U CN201720192368U CN206506275U CN 206506275 U CN206506275 U CN 206506275U CN 201720192368 U CN201720192368 U CN 201720192368U CN 206506275 U CN206506275 U CN 206506275U
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Abstract
The utility model discloses a kind of Self-recover overvoltage-undervoltage protector power cut detection circuit, including single-chip microcomputer, single-chip microcomputer is made up of the first triode Q1 and the second triode Q2.This Self-recover overvoltage-undervoltage protector power cut detection circuit, single-chip microcomputer is in sleep state usually using the signal method work of detection mains frequency, single-chip microcomputer; when receiving the signal of 50Hz frequencies; single-chip microcomputer is waken up, and is started detection circuit, is performed order, order terminates rear single-chip microcomputer sleep；When having a power failure, single-chip microcomputer completes all working, and disconnect relay by power cut detection circuit in moment；Switch on power, the signal of 50Hz frequencies is received again, single-chip microcomputer is waken up again, restarts work；So single-chip microcomputer power consumption is low, and detection is accurate, when burst has a power failure can instantaneous trip circuit protection circuit, damage will not be caused to the electrical equipment on circuit, good protective value is improved.
Description
Technical field
The utility model is related to circuit protection technical field, and especially a kind of Self-recover overvoltage-undervoltage protector, which has a power failure, detects electricity
Road.
Background technology
Self-recovering type overvoltage-undervoltage protector be it is a kind of can be from dynamic circuit breaker when overvoltage in circuit and under-voltage exceed setting
Open, and energy automatic detection circuit voltage, the device with protection circuit can be closed automatically when voltage recovers normal in circuit, at present
The self-recovering type overvoltage-undervoltage protector of in the market is in transient-power failure, be powered the protection circuit that will not cut off the electricity supply, and makes the electricity on circuit
Device is caused damage to the electrical equipment and protector on circuit, is likely to result in secondary injury in itself by the moment very big impact that is powered,
In-line power is influenceed, causes to damage again, such current technology there are very big problems and disadvantages.
Utility model content
The purpose of this utility model is to provide a kind of Self-recover overvoltage-undervoltage protector power cut detection circuit possess inside certainly
The characteristics of closing automatically with protection circuit when voltage recovers normal in standby detection circuit, automatic detection circuit voltage, circuit, with
The problem of solving to propose in above-mentioned background technology.
To achieve the above object, the utility model provides following technical scheme：A kind of Self-recover overvoltage-undervoltage protector has a power failure
Circuit, including single-chip microcomputer are detected, single-chip microcomputer is made up of the first triode Q1 and the second triode Q2, the first triode Q1's
Colelctor electrode connects electric capacity C2 and resistance R19 one end, and the electric capacity C2 other end is connected to switching diode D9 positive pole and opened
Diode D8 negative pole is closed, the another of resistance R19 is terminated on positive 5V voltage sources；Switching diode D9 negative pole is connected to resistance
R20 one end, the resistance R20 other end is connected to switching diode D8 positive pole and is connected to the first triode Q1 transmitting
Pole, goes back shunt capacitance C3 on resistance R20；The base series resistor R18 of the first triode Q1 is simultaneously connected to the two or three pole
Pipe Q2 colelctor electrode；First triode Q1 emitter stage is connected to the second triode Q2 emitter stage and ground connection；Second triode
Q2 collector series resistance R17 is simultaneously connected on positive 5V voltage sources；The base stage connection resistance R16A of the second triode Q2；Electricity
Hinder R16A series resistances R16B.
It is used as further program of the utility model：The single-chip microcomputer is also connected with relay, and relay, which is set, is connected to the
Two triode Q2 colelctor electrode interface.
It is used as further program of the utility model：One end connection DV1 interfaces of the resistance R16B.
Compared with prior art, the utility model beneficial effect：
This Self-recover overvoltage-undervoltage protector power cut detection circuit, including single-chip microcomputer, single-chip microcomputer is by the first triode Q1 and
Two triode Q2 are constituted, built-in security detection circuit, can be disconnected automatically when overvoltage in circuit and under-voltage exceed setting,
And energy automatic detection circuit voltage, the device with protection circuit, single-chip microcomputer can be closed automatically when voltage recovers normal in circuit
Using detection mains frequency signal method work, single-chip microcomputer is in sleep state usually, when receiving the signal of 50Hz frequencies, single
Piece machine is waken up, and is started detection circuit, is performed order, order terminates rear single-chip microcomputer sleep；When having a power failure, single-chip microcomputer is by having a power failure
Circuit is detected, all working is completed in moment, and disconnect relay；Switch on power, the signal of 50Hz frequencies, monolithic are received again
Machine is waken up again, restarts work；So single-chip microcomputer power consumption is low, and detection is accurate, can instantaneous trip circuit when burst has a power failure
Protection circuit, will not cause damage to the electrical equipment on circuit, improve good protective value.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
In figure：1- single-chip microcomputers, 2- relays.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, a kind of Self-recover overvoltage-undervoltage protector power cut detection circuit, including
Single-chip microcomputer 1, single-chip microcomputer 1 is made up of the first triode Q1 and the second triode Q2, the colelctor electrode connection of the first triode Q1
Electric capacity C2 and resistance R19 one end, the electric capacity C2 other end are connected to switching diode D9 positive pole and switching diode D8
Negative pole, the another of resistance R19 terminated on positive 5V voltage sources；Switching diode D9 negative pole is connected to resistance R20 one end,
The resistance R20 other end is connected to switching diode D8 positive pole and is connected to the first triode Q1 emitter stage, in resistance R20
On go back shunt capacitance C3；The base series resistor R18 of the first triode Q1 and the colelctor electrode for being connected to the second triode Q2；
First triode Q1 emitter stage is connected to the second triode Q2 emitter stage and ground connection；Second triode Q2 colelctor electrode series connection
Resistance R17 is simultaneously connected on positive 5V voltage sources；The base stage connection resistance R16A of the second triode Q2；Resistance R16A series resistances
R16B, resistance R16B one end connection DV1 interfaces；Single-chip microcomputer 1 is also connected with relay 2, and relay 2 sets and is connected to the two or three pole
Pipe Q2 colelctor electrode interface.
In summary：This Self-recover overvoltage-undervoltage protector power cut detection circuit, including single-chip microcomputer 1, single-chip microcomputer 1 be also connected with after
Electrical equipment 2, the built-in security of single-chip microcomputer 1 detection circuit, can disconnect automatically when overvoltage in circuit and under-voltage exceed setting, and
Energy automatic detection circuit voltage, can close the device with protection circuit automatically, single-chip microcomputer is adopted when voltage recovers normal in circuit
Worked with detection mains frequency signal method, single-chip microcomputer is in sleep state, when receiving the signal of 50Hz frequencies, monolithic usually
Machine is waken up, and is started detection circuit, is performed order, order terminates rear single-chip microcomputer sleep；When having a power failure, single-chip microcomputer is examined by having a power failure
Slowdown monitoring circuit, completes all working, and disconnect relay in moment；Switch on power, the signal of 50Hz frequencies, single-chip microcomputer are received again
Again it is waken up, restarts work；So single-chip microcomputer power consumption is low, detects accurate, can instantaneous trip circuit guarantor when burst has a power failure
Protection circuit, will not cause damage to the electrical equipment on circuit, improve good protective value.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It may be appreciated other embodiment.
Claims (3)
1. a kind of Self-recover overvoltage-undervoltage protector power cut detection circuit, including single-chip microcomputer (1), single-chip microcomputer (1) is by the first triode
Q1 and the second triode Q2 compositions, it is characterised in that：The colelctor electrode connection electric capacity C2's and resistance R19 of the first triode Q1
One end, the electric capacity C2 other end is connected to switching diode D9 positive pole and switching diode D8 negative pole, and resistance R19's is another
One end is connected on positive 5V voltage sources；Switching diode D9 negative pole is connected to resistance R20 one end, and the resistance R20 other end connects
It is connected to switching diode D8 positive pole and is connected to the first triode Q1 emitter stage, shunt capacitance C3 is gone back on resistance R20；Institute
State the first triode Q1 base series resistor R18 and be connected to the second triode Q2 colelctor electrode；First triode Q1 hair
Emitter-base bandgap grading is connected to the second triode Q2 emitter stage and ground connection；Second triode Q2 collector series resistance R17 is simultaneously connected to just
On 5V voltage sources；The base stage connection resistance R16A of the second triode Q2；Resistance R16A series resistances R16B.
2. a kind of Self-recover overvoltage-undervoltage protector power cut detection circuit according to claim 1, it is characterised in that：The list
Piece machine (1) is also connected with relay (2), and relay (2) sets the colelctor electrode interface for being connected to the second triode Q2.
3. a kind of Self-recover overvoltage-undervoltage protector power cut detection circuit according to claim 1, it is characterised in that：The electricity
Hinder R16B one end connection DV1 interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720192368.1U CN206506275U (en) | 2017-03-01 | 2017-03-01 | A kind of Self-recover overvoltage-undervoltage protector power cut detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720192368.1U CN206506275U (en) | 2017-03-01 | 2017-03-01 | A kind of Self-recover overvoltage-undervoltage protector power cut detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206506275U true CN206506275U (en) | 2017-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720192368.1U Active CN206506275U (en) | 2017-03-01 | 2017-03-01 | A kind of Self-recover overvoltage-undervoltage protector power cut detection circuit |
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| CN (1) | CN206506275U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445337A (en) * | 2018-10-31 | 2019-03-08 | 珠海格力电器股份有限公司 | Port protection circuit and its control method, control circuit, device and system |
-
2017
- 2017-03-01 CN CN201720192368.1U patent/CN206506275U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445337A (en) * | 2018-10-31 | 2019-03-08 | 珠海格力电器股份有限公司 | Port protection circuit and its control method, control circuit, device and system |
| CN109445337B (en) * | 2018-10-31 | 2021-05-07 | 珠海格力电器股份有限公司 | Port protection circuit and control method, control circuit, device and system thereof |
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