CN206211500U - A kind of power protection design of hardware and software of anti-output short-circuit - Google Patents
A kind of power protection design of hardware and software of anti-output short-circuit Download PDFInfo
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- CN206211500U CN206211500U CN201621153421.9U CN201621153421U CN206211500U CN 206211500 U CN206211500 U CN 206211500U CN 201621153421 U CN201621153421 U CN 201621153421U CN 206211500 U CN206211500 U CN 206211500U
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Abstract
The utility model discloses a kind of power protection design of hardware and software of anti-output short-circuit; power module is connected with the source electrode of FET Q3 and the negative electrode of voltage-regulator diode Z1 simultaneously, and the anode of voltage-regulator diode Z1 is connected with one end of resistance R15 and the grid of FET Q3 simultaneously；Anode of the drain electrode of FET Q3 simultaneously with comparison module, the positive pole of load and switching diode D4 is connected, the negative pole ground connection of load, the negative electrode of switching diode D4 is connected with the colelctor electrode of first switch amplifier, comparison module is connected with single-chip microcomputer, single-chip microcomputer DET_P_COM pins are connected with the base stage of first switch amplifier, the colelctor electrode of first switch amplifier is connected with the base stage of second switch amplifier, and the colelctor electrode of second switch amplifier is connected with the grid of FET Q3.A kind of power protection software and hardware of anti-output short-circuit of the present utility model, effectively prevents from burning out controller or fire occurs, and increases the service life, and improves operating efficiency.
Description
Technical field
The utility model is related to power protection field, in particular to a kind of power protection of anti-output short-circuit
Design of hardware and software.
Background technology
At present, in power protection field, alarm detector once breaks down short circuit, will burn out controller, is
This problem is solved, alarm detector is protected with resettable fuse, but there is also some problems, self- recoverage
Fuse produces passing through for the big prevention electric current of high-temperature electric resistive when abnormal big electric current occurs in circuit, but under long-time high temperature easily
Bad, bad materials environment temperature, operating current, actuation time (is conducting to the time of shut-off), work compression resistance, actuation time control long
Device processed may be burned out, when voltage instability regularly, in the absence of overvoltage protection and under-voltage protection, overtension will damage correlation
Control circuit when or occur fire.
Utility model content
The utility model is intended at least solve one of above-mentioned technical problem of the prior art to a certain extent.In view of
This, the utility model needs to provide a kind of power protection design of hardware and software of anti-output short-circuit, can protect relevant control circuit,
Increase the service life.
The power protection design of hardware and software of a kind of anti-output short-circuit according to embodiment of the present utility model, power module leads to
Resistance R12 is crossed while being connected with the source electrode of FET Q3 and the negative electrode of voltage-regulator diode Z1, the anode of voltage-regulator diode Z1
It is connected with one end of resistance R15 and the grid of FET Q3 simultaneously, the other end ground connection of resistance R15；FET Q3's
Anode of the drain electrode simultaneously with comparison module, the positive pole of load and switching diode D4 is connected, the negative pole ground connection of load, switch two
The negative electrode of pole pipe D4 is connected by resistance R17 with the colelctor electrode of first switch amplifier Q4, the comparison module and single-chip microcomputer
AD_DET_P pins are connected, and single-chip microcomputer DET_P_COM pins are connected with the base stage of the first switch amplifier, and described
The colelctor electrode of one switching amplifier is connected with the base stage of second switch amplifier, the colelctor electrode of the second switch amplifier with
The grid of FET Q3 is connected.
According to one embodiment of the present utility model, a kind of power protection design of hardware and software of anti-output short-circuit is further wrapped
Electric capacity C21 is included, the positive pole of electric capacity C21 is connected with the drain electrode of FET Q3, the negative pole ground connection of electric capacity C21.
According to one embodiment of the present utility model, the comparison module uses voltage comparator.
According to one embodiment of the present utility model, electric capacity C21 is electrochemical capacitor.
According to one embodiment of the present utility model, the voltage range of the power module is 18V-32V.
According to one embodiment of the present utility model, FET Q3 is P-channel enhancement type FET.
According to one embodiment of the present utility model, the power module includes the dc source and electric capacity that are connected in parallel
C19, the negative pole of the dc source is grounded simultaneously with one end of electric capacity C19.
The beneficial effect of technical solutions of the utility model is:The utility model uses above-mentioned technical proposal, in the industry,
When breaking down short-circuit for alarm detector, overvoltage protection and under-voltage protection are carried out using above-mentioned technical proposal, tie up voltage
Hold normal output or turn off, be effectively prevented and burn out controller or fire occurs, extend service life, improve work
Efficiency.
Brief description of the drawings
Fig. 1 is the power protection design of hardware and software circuit of a kind of anti-output short-circuit according to embodiment of the present utility model
Structural representation.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the utility model, and it is not intended that to limit of the present utility model
System.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise " are based on orientation shown in the drawings or position relationship, merely to just
Described with simplified in description the utility model, must be with specific side rather than the device or element for indicating or imply meaning
Position, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " is meant that two or two
More than, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or two interaction relationships of element.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
D score can include the first and second feature directly contacts, it is also possible to including the first and second features not be directly contact but logical
The other characterisation contact crossed between them.And, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.First is special
Levy second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
As shown in figure 1, a kind of power protection design of hardware and software 100 of anti-output short-circuit, power module 60 is by resistance R12
It is connected with the source electrode of FET Q3 and the negative electrode of voltage-regulator diode Z1 simultaneously, the anode of voltage-regulator diode Z1 is while and resistance
R15 is connected with the grid of FET Q3, the other end ground connection of resistance R15；The drain electrode of FET Q3 simultaneously with compare mould
Block 70, the positive pole of load are connected with the anode of switching diode D4, and the negative pole ground connection of load, the negative electrode of switching diode D4 leads to
Resistance R17 is crossed to be connected with the colelctor electrode of first switch amplifier 80.
Comparison module 70 includes resistance R20, comparator U4B, resistance R21, voltage-regulator diode Z2 and electric capacity C22, resistance R20
The other end be connected with the negative pole of the in-phase input end, one end of resistance R21 and voltage-regulator diode Z2 of comparator U4B, resistance
The other end of R21 is with voltage-regulator diode Z2 while ground connection, the output end of comparator U4B and inverting input, the electricity of comparator U4B
One end connection of R22 is hindered, the other end of resistance R22 is connected with one end of electric capacity C22 and Chip Microcomputer A/D _ DET_P pins, electric capacity
The other end ground connection of C22.
Single-chip microcomputer DET_P_CON pins are connected with the base stage of first switch amplifier 80, first switch amplifier 80
Colelctor electrode is connected with the base stage of second switch amplifier 90, the colelctor electrode of second switch amplifier 90 and the grid of FET Q3
Pole is connected.
As shown in figure 1, a kind of power protection design of hardware and software 100 of anti-output short-circuit further includes electric capacity C21, electric capacity
The positive pole of C21 is connected with the drain electrode of FET Q3, the negative pole ground connection of electric capacity C21.
As shown in figure 1, comparison module 70 uses voltage comparator, by the voltage and reference voltage of current sampling resistor
Make comparisons.
As shown in figure 1, electric capacity C21 is electrochemical capacitor.
As shown in figure 1, the voltage range of power module 60 is 18V-32V.
As shown in figure 1, FET Q3 is P-channel enhancement type FET.
As shown in figure 1, power module 60 includes the dc source and electric capacity C19 that are connected in parallel, the negative pole of dc source with
One end of electric capacity C19 is grounded simultaneously.
It is residual current transformer failure detector circuit of the present invention to be exemplified below, and during Practical Project use simultaneously
Not limited to this.
As shown in figure 1, when a kind of circuit voltage of power protection design of hardware and software 100 of anti-output short-circuit is unstable, leading to
Cross+24V voltages to be grounded by resistance R12, voltage-regulator diode Z1 and resistance R15, in the grid of P-channel enhancement type FET Q3
G partial pressures obtain 14V (24-10=14V), but the source S of FET Q3 is the voltage of 24V, so the leakage of FET Q3
Pole D and source S are turned on, and the voltage that 24V is obtained in load is given single-chip microcomputer and judged whether through dual operational amplifier U4B voltage samplings
Normally, if spread of voltage (over-pressed, under-voltage), single-chip microcomputer gives DET_P_COM mono- high level, conducting switch triode Q4 and
Switch triode Q2, when the grid G of FET Q3 is pulled high to 24V, FET Q3 cut-offs, single-chip microcomputer after a period of time
Complete overvoltage protection and under-voltage protection to DET_P_COM mono- low level, FET Q3 conductings, duplicate detection.
As shown in figure 1, when a kind of circuit voltage of power protection design of hardware and software 100 of anti-output short-circuit is normal, single-chip microcomputer
It is failure to actuate, when there are load short circuits when powering load, the voltage high produced on current sampling resistor makes the pole of switch three
Pipe Q2 is turned on, and (software is also actionable) is ended when the grid G of FET Q3 is increased to drain D and close source S.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be with
Combined in an appropriate manner in one or more any embodiments or example.Additionally, those skilled in the art can be by
Different embodiments or example described in this specification are engaged and combined.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (7)
1. a kind of power protection design of hardware and software of anti-output short-circuit, it is characterised in that power module by resistance R12 simultaneously with
The source electrode of FET Q3 is connected with the negative electrode of voltage-regulator diode Z1, and the anode of voltage-regulator diode Z1 is simultaneously with resistance R15's
One end is connected with the grid of FET Q3, the other end ground connection of resistance R15；The drain electrode of FET Q3 simultaneously with compare mould
Block, the positive pole of load are connected with the anode of switching diode D4, and the negative pole ground connection of load, the negative electrode of switching diode D4 passes through
Resistance R17 is connected with the colelctor electrode of first switch amplifier, and the comparison module is connected with single-chip microcomputer pin, single-chip microcomputer with
The base stage of the first switch amplifier is connected, the colelctor electrode of the first switch amplifier and the base of second switch amplifier
Pole is connected, and the colelctor electrode of the second switch amplifier is connected with the grid of FET Q3.
2. the power protection design of hardware and software of a kind of anti-output short-circuit according to claim 1, it is characterised in that further include
The positive pole of electric capacity C21, electric capacity C21 is connected with the drain electrode of FET Q3, the negative pole ground connection of electric capacity C21.
3. the power protection design of hardware and software of a kind of anti-output short-circuit according to claim 1, it is characterised in that described to compare mould
Block uses voltage comparator.
4. the power protection design of hardware and software of a kind of anti-output short-circuit according to claim 2, it is characterised in that electric capacity C21 is
Electrochemical capacitor.
5. a kind of power protection design of hardware and software of anti-output short-circuit according to claim 1, it is characterised in that the power supply mould
The voltage range of block is 18V-32V.
6. a kind of power protection design of hardware and software of anti-output short-circuit according to claim 1, it is characterised in that FET Q3
It is P-channel enhancement type FET.
7. a kind of power protection design of hardware and software of anti-output short-circuit according to claim 1, it is characterised in that the power supply mould
Block includes the dc source and electric capacity C19 that are connected in parallel, and the negative pole of the dc source is grounded simultaneously with one end of electric capacity C19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621153421.9U CN206211500U (en) | 2016-10-31 | 2016-10-31 | A kind of power protection design of hardware and software of anti-output short-circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621153421.9U CN206211500U (en) | 2016-10-31 | 2016-10-31 | A kind of power protection design of hardware and software of anti-output short-circuit |
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| Publication Number | Publication Date |
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| CN206211500U true CN206211500U (en) | 2017-05-31 |
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ID=58758564
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| CN201621153421.9U Active CN206211500U (en) | 2016-10-31 | 2016-10-31 | A kind of power protection design of hardware and software of anti-output short-circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631279A (en) * | 2018-06-28 | 2018-10-09 | 深圳市泛海三江电子股份有限公司 | Overcurrent protection circuit |
| CN113078616A (en) * | 2021-04-02 | 2021-07-06 | 广东美电贝尔科技集团股份有限公司 | Rear-stage direct-current power supply circuit |
| CN113410817A (en) * | 2021-06-16 | 2021-09-17 | 金华卓远实业有限公司 | Short-circuit protection circuit, device with same and method |
-
2016
- 2016-10-31 CN CN201621153421.9U patent/CN206211500U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631279A (en) * | 2018-06-28 | 2018-10-09 | 深圳市泛海三江电子股份有限公司 | Overcurrent protection circuit |
| CN108631279B (en) * | 2018-06-28 | 2024-01-23 | 深圳市高新投三江电子股份有限公司 | Overcurrent protection circuit |
| CN113078616A (en) * | 2021-04-02 | 2021-07-06 | 广东美电贝尔科技集团股份有限公司 | Rear-stage direct-current power supply circuit |
| CN113410817A (en) * | 2021-06-16 | 2021-09-17 | 金华卓远实业有限公司 | Short-circuit protection circuit, device with same and method |
| CN113410817B (en) * | 2021-06-16 | 2024-05-14 | 金华卓远实业有限公司 | Short-circuit protection circuit, device with circuit and method |
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