CN206135402U - Self -adaptation current foldback circuit - Google Patents
Self -adaptation current foldback circuit Download PDFInfo
- Publication number
- CN206135402U CN206135402U CN201621067744.6U CN201621067744U CN206135402U CN 206135402 U CN206135402 U CN 206135402U CN 201621067744 U CN201621067744 U CN 201621067744U CN 206135402 U CN206135402 U CN 206135402U
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- resistance
- type triode
- pnp type
- colelctor electrode
- pnp
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- 230000005669 field effect Effects 0.000 claims abstract description 13
- 230000003044 adaptive effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 2
- 206010003830 Automatism Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Abstract
The utility model discloses a self -adaptation current foldback circuit, include: tracking circuit and bias circuit, the tracking circuit includes: current sample resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 5th PNP type triode, the 6th PNP type triode, the 7th NPN type triode, bias circuit includes first resistance, second resistance, third resistance, fourth resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 15 resistance, the 16 resistance, first voltage limiting diode, second voltage limiting diode, third voltage limiting diode, a PNP type triode, the 2nd PNP type triode, the 3rd NPN type triode, fourth NPN type triode, field effect transistor, the device of wide region operating voltage work can be solved to this patent and the fixed defect of overcurrent protection point makes its overcurrent protection point its protection point voltage of change automatically regulated according to its operating voltage.
Description
Technical field
This utility model is related to space power system technical field, more particularly to a kind of high voltage wide-range power it is adaptive
Answer current foldback circuit.
Background technology
Current foldback circuit is protection circuit necessary to space electronic product, and its function is to go out inside the sub- product device seriously
Overload problem and automatically by its function with power supply buses automatism isolation, to protect spacecraft power supply buses safety.It is universal at present
Using current foldback circuit mainly have two kinds, the first is irrecoverable mode (fuse mode), and another kind is to recover
Mode (electrical switch mode).The current two ways of space device is adopted simultaneously, wherein for important electronic installation is adopted at present
With can reset mode current foldback circuit.But its over-current protection point is fixed point, for the voltage application scenario of wide scope
Electronic installation, the setting of its circuit protection is designed by the maximum current of the equipment, and considers the equipment in minimum work
The input current for making voltage is 3～4 times of electric current under normal voltage state, is this circuit employing for wide scope running voltage
The method for fixing flow point is unable to optimum optimization system design.
Utility model content
The technical problems to be solved in the utility model is：A kind of adaptive overcurrent protection circuit is provided.The self adaptation excessively stream
Protection circuit main purpose is the defect of the device of solution wide scope running voltage work and over-current protection point fixation so as to excessively stream
Protection point automatically adjusts its protection point voltage according to the change of its running voltage, so that its input protection feature is approximately permanent work(
Rate mode, so as to guard space spacecraft power supply safety to greatest extent.
This utility model is adopted the technical scheme that to solve technical problem present in known technology：
A kind of adaptive overcurrent protection circuit, at least includes：
Tracking circuit；The tracking circuit includes：The current sampling resistor that electrically connects with positive source, the 11st resistance,
12nd resistance, the 13rd resistance, the 14th resistance, the 5th PNP type triode, the 6th PNP type triode, the 7th NPN type three
Pole pipe；
Biasing circuit；The biasing circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th electric
Resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 15th resistance, the 16th resistance, the first limit
Pressure diode, the second pressure limiting diode, the 3rd pressure limiting diode, the first PNP type triode, the second PNP type triode, the 3rd
NPN type triode, the 4th NPN type triode, field effect transistor；Wherein：
The negative pole of the power supply passes sequentially through the positive pole connection of the 6th resistance, 3rd resistor, first resistor and power supply；It is described
The negative pole of power supply passes sequentially through the 6th resistance, the 4th resistance and electrically connects with the colelctor electrode of the second PNP type triode；Described second
The colelctor electrode of PNP type triode with the colelctor electrode of the 4th NPN type triode by the 7th resistance according to being electrically connected；4th NPN
The emitter stage of type audion passes through the 8th resistance eutral grounding；The base stage of the 3rd NPN type triode and the 4th NPN type triode
Base stage is electrically connected；The emitter stage of the 3rd NPN type triode is grounded by the second pressure limiting diode；3rd NPN type three
The colelctor electrode of pole pipe is electrically connected by the 5th resistance with the colelctor electrode of the first PNP type triode；First PNP type triode
Emitter stage is electrically connected with positive source；The positive source passes sequentially through first resistor, the first pressure limiting diode and the first positive-negative-positive
The base stage electrical connection of audion；The positive source is electrically connected by second resistance with the base stage of the first PNP type triode；It is described
The emitter stage of the positive pole of power supply and the second PNP type triode, the emitter stage of the 5th PNP type triode, the 6th PNP type triode
The source electrode electrical connection of emitter stage, field effect transistor；The colelctor electrode of first PNP type triode and the base of the second PNP type triode
Pole electrically connects；The colelctor electrode of the 5th PNP type triode is electrically connected by the 7th resistance with the colelctor electrode of the 4th NPN type triode；
The colelctor electrode of the 5th PNP type triode is electrically connected respectively by the source electrode of the 3rd pressure limiting diode, the 15th resistance and field effect transistor
Connect；The colelctor electrode of the 5th PNP type triode is electrically connected by the 16th resistance with the grid of field effect transistor；The power supply is just
Pole is electrically connected respectively by the first electric capacity, the 9th resistance with the base stage of the 5th PNP type triode；The base of the 5th PNP type triode
Pole electrically connects with the colelctor electrode of the 6th PNP type triode；The colelctor electrode of the 6th PNP type triode pass sequentially through the 12nd resistance,
13rd resistance is electrically connected with the colelctor electrode of the 7th NPN type triode；The emitter stage of the 7th NPN type triode passes through the tenth
Four resistance eutral groundings；The colelctor electrode of the first PNP type triode is electrically connected by the tenth resistance and the emitter stage of the 4th NPN type triode
Connect；The colelctor electrode of the first PNP type triode passes sequentially through the 11st resistance, the 14th resistance eutral grounding；3rd NPN type triode
Colelctor electrode is electrically connected with the base stage of the 7th NPN type triode；The base stage of the 6th PNP type triode passes through the 13rd resistance and the 7th
The colelctor electrode electrical connection of NPN type triode；The colelctor electrode of the 6th PNP type triode passes sequentially through the 12nd resistance, the 13rd electric
Resistance is electrically connected with the colelctor electrode of the 7th NPN type triode.
This utility model has the advantages and positive effects that：
This utility model patent automatically adjusts excessively stream by adopting above-mentioned technical proposal according to the change of input voltage
Protect the mode put to solve the integrated protection of system, protection circuit is approximately operated in the way of invariable power；The circuit
Using the circuit form of current-limiting protection point automatic tracing voltage, adopt in the running voltage of whole wide scope and protected in low pressure
Point is maximum, and voltage protects point for minima when peaking, and by the protection point that reasonable adjusting is optimal, makes whole electricity
Road reaches rational protection power in whole wide-voltage range.
Description of the drawings：
Fig. 1 is the circuit diagram of this utility model preferred embodiment；
Fig. 2 is using overcurrent protection value after this utility model circuit and input voltage homologous thread figure.
Specific embodiment
For utility model content of the present utility model, feature and effect can be further appreciated that, following examples are hereby enumerated, and
Accompanying drawing is coordinated to describe in detail as follows：
Refer to Fig. 1, a kind of adaptive overcurrent protection circuit, including：
Tracking circuit；The tracking circuit includes：The current sampling resistor R electrically connected with positive sourceSHUNT, it is the 11st electric
Resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 5th PNP type triode Q5, the 6th positive-negative-positive three
Pole pipe Q6, the 7th NPN type triode Q7；
Biasing circuit；The biasing circuit include first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4,
5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 15th resistance
R15, the 16th resistance R16, the first pressure limiting diode VD1, the second pressure limiting diode VD2, the 3rd pressure limiting diode VD3, first
PNP type triode Q1, the second PNP type triode Q2, the 3rd NPN type triode Q3, the 4th NPN type triode Q4, field effect transistor
M1；Wherein：
The negative pole of the power supply passes sequentially through the positive pole of the 6th resistance R6,3rd resistor R3, first resistor R1 and power supply and connects
Connect；The negative pole of the power supply passes sequentially through the 6th resistance R6, the 4th resistance R4 and is electrically connected with the colelctor electrode of the second PNP type triode Q2
Connect；The colelctor electrode of second PNP type triode Q2 is according to the colelctor electrode electricity by the 7th resistance R7 and the 4th NPN type triode Q4
Connection；The emitter stage of the 4th NPN type triode Q4 is grounded by the 8th resistance R8；3rd NPN type triode Q3
Base stage is electrically connected with the base stage of the 4th NPN type triode Q4；The emitter stage of the 3rd NPN type triode Q3 passes through the second pressure limiting
Diode VD2 is grounded；The colelctor electrode of the 3rd NPN type triode Q3 is by the 5th resistance R5 and the first PNP type triode Q1
Colelctor electrode electrical connection；The emitter stage of first PNP type triode Q1 is electrically connected with positive source；The positive source is successively
Electrically connected with the base stage of the first PNP type triode Q1 by first resistor R1, the first pressure limiting diode VD1；The positive source
Electrically connected with the base stage of the first PNP type triode Q1 by second resistance R2；The positive pole of the power supply and the second PNP type triode
The emitter stage of Q2, the emitter stage of the 5th PNP type triode Q5, the emitter stage of the 6th PNP type triode Q6, the source of field effect transistor M1
Pole electrically connects；The colelctor electrode of first PNP type triode Q1 is electrically connected with the base stage of the second PNP type triode Q2；5th PNP
The colelctor electrode of type audion Q5 is electrically connected by the 7th resistance R7 with the colelctor electrode of the 4th NPN type triode Q4；5th positive-negative-positive three
The colelctor electrode of pole pipe Q5 is electrically connected respectively by the source electrode of the 3rd pressure limiting diode VD3, the 15th resistance R15 and field effect transistor M1
Connect；The colelctor electrode of the 5th PNP type triode Q5 is electrically connected by the 16th resistance R16 with the grid of field effect transistor M1；Institute
State positive source to electrically connect with the base stage of the 5th PNP type triode Q5 by the first electric capacity C1, the 9th resistance R9 respectively；5th
The base stage of PNP type triode Q5 is electrically connected with the colelctor electrode of the 6th PNP type triode Q6；The current collection of the 6th PNP type triode Q6
Pole passes sequentially through the 12nd resistance R12, the 13rd resistance R13 and electrically connects with the colelctor electrode of the 7th NPN type triode Q7；Described
The emitter stage of seven NPN type triodes passes through the 14th resistance eutral grounding；The colelctor electrode of the first PNP type triode Q1 passes through the tenth resistance
R10 is electrically connected with the emitter stage of the 4th NPN type triode Q4；The colelctor electrode of the first PNP type triode Q1 passes sequentially through the 11st
Resistance R11, the 14th resistance R14 are grounded；The colelctor electrode of the 3rd NPN type triode Q3 and the base stage of the 7th NPN type triode Q7
Electrical connection；The colelctor electrode electricity that the base stage of the 6th PNP type triode Q6 passes through the 13rd resistance R13 and the 7th NPN type triode Q7
Connection；The colelctor electrode of the 6th PNP type triode Q6 passes sequentially through the 12nd resistance R12, the 13rd resistance R13 and the 7th NPN type
The colelctor electrode electrical connection of audion Q7.
The circuit is adopted using the circuit form of current-limiting protection point automatic tracing voltage in the running voltage of whole wide scope
Used in low pressure when protection point be maximum, and voltage when peaking protection point be minima, it is optimal by reasonable adjusting
Protection point, makes whole circuit reach rational protection power in whole wide-voltage range.The protective current point of circuit and output electricity
Pressure relation is as follows：
I1=Iref-I2…………………………………………………….……(2)
Iout=Ik-VIN·KI……………………………………………….……(4)
Wherein：IOUTIt is output current；I1It is the electric current for flowing through the 12nd resistance R12；IrefIt is reference current；I2It is to flow through
The electric current V of the 11st resistance R11INIt is input voltage；VrefIt is reference voltage；IkIt is bigoted electric current；KIIt is penalty coefficient.
Fig. 2 is referred to, is linear relationship between overcurrent protection value and input voltage.
Embodiment of the present utility model has been described in detail above, but the content is only of the present utility model preferable
Embodiment, it is impossible to be considered as limiting practical range of the present utility model.It is all according to this utility model application range made it is equal
Deng change and improvement etc., all should still belong within patent covering scope of the present utility model.
Claims (1)
1. a kind of adaptive overcurrent protection circuit, it is characterised in that：At least include：
Tracking circuit；The tracking circuit includes：The current sampling resistor that electrically connects with positive source, the 11st resistance, the tenth
Two resistance, the 13rd resistance, the 14th resistance, the 5th PNP type triode, the 6th PNP type triode, the 7th NPN type triode；
Biasing circuit；The biasing circuit include first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the
Six resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 15th resistance, the 16th resistance, the pole of the first pressure limiting two
Pipe, the second pressure limiting diode, the 3rd pressure limiting diode, the first PNP type triode, the second PNP type triode, the 3rd NPN type three
Pole pipe, the 4th NPN type triode, field effect transistor；Wherein：
The negative pole of the power supply passes sequentially through the positive pole connection of the 6th resistance, 3rd resistor, first resistor and power supply；The power supply
Negative pole pass sequentially through the 6th resistance, the 4th resistance and electrically connect with the colelctor electrode of the second PNP type triode；Second positive-negative-positive
The colelctor electrode of audion with the colelctor electrode of the 4th NPN type triode by the 7th resistance according to being electrically connected；The pole of 4th NPN type three
The emitter stage of pipe passes through the 8th resistance eutral grounding；The base stage of the 3rd NPN type triode is electric with the base stage of the 4th NPN type triode
Connection；The emitter stage of the 3rd NPN type triode is grounded by the second pressure limiting diode；3rd NPN type triode
Colelctor electrode is electrically connected by the 5th resistance with the colelctor electrode of the first PNP type triode；The emitter stage of first PNP type triode
Electrically connect with positive source；The positive source passes sequentially through first resistor, the first pressure limiting diode and the first PNP type triode
Base stage electrical connection；The positive source is electrically connected by second resistance with the base stage of the first PNP type triode；The power supply
The emitter stage of positive pole and the second PNP type triode, the emitter stage of the 5th PNP type triode, the transmitting of the 6th PNP type triode
Pole, the source electrode electrical connection of field effect transistor；The colelctor electrode of first PNP type triode and the base stage electricity of the second PNP type triode
Connection；The colelctor electrode of the 5th PNP type triode is electrically connected by the 7th resistance with the colelctor electrode of the 4th NPN type triode；5th
The colelctor electrode of PNP type triode is electrically connected respectively by the 3rd pressure limiting diode, the 15th resistance with the source electrode of field effect transistor；Institute
The colelctor electrode for stating the 5th PNP type triode is electrically connected by the 16th resistance with the grid of field effect transistor；The positive source point
Not Tong Guo the first electric capacity, the 9th resistance electrically connect with the base stage of the 5th PNP type triode；The base stage of the 5th PNP type triode with
The colelctor electrode electrical connection of the 6th PNP type triode；The colelctor electrode of the 6th PNP type triode pass sequentially through the 12nd resistance, the tenth
Three resistance are electrically connected with the colelctor electrode of the 7th NPN type triode；The emitter stage of the 7th NPN type triode is electric by the 14th
Resistance ground connection；The colelctor electrode of the first PNP type triode is electrically connected by the tenth resistance with the emitter stage of the 4th NPN type triode；The
The colelctor electrode of one PNP type triode passes sequentially through the 11st resistance, the 14th resistance eutral grounding；The current collection of the 3rd NPN type triode
Pole electrically connects with the base stage of the 7th NPN type triode；The base stage of the 6th PNP type triode is by the 13rd resistance and the 7th NPN
The colelctor electrode electrical connection of type audion；The colelctor electrode of the 6th PNP type triode pass sequentially through the 12nd resistance, the 13rd resistance with
The colelctor electrode electrical connection of the 7th NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621067744.6U CN206135402U (en) | 2016-09-19 | 2016-09-19 | Self -adaptation current foldback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621067744.6U CN206135402U (en) | 2016-09-19 | 2016-09-19 | Self -adaptation current foldback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206135402U true CN206135402U (en) | 2017-04-26 |
Family
ID=58570201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621067744.6U Withdrawn - After Issue CN206135402U (en) | 2016-09-19 | 2016-09-19 | Self -adaptation current foldback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206135402U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229954A (en) * | 2016-09-19 | 2016-12-14 | 中国电子科技集团公司第十八研究所 | Self-adaptive overcurrent protection circuit |
| CN110514883A (en) * | 2019-09-18 | 2019-11-29 | 中国电子科技集团公司第五十八研究所 | A kind of high pressure wide input range current sample operational amplifier circuit |
| CN114336499A (en) * | 2021-11-25 | 2022-04-12 | 河南嘉晨智能控制股份有限公司 | Scheme for adaptively adjusting over-current protection point |
-
2016
- 2016-09-19 CN CN201621067744.6U patent/CN206135402U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229954A (en) * | 2016-09-19 | 2016-12-14 | 中国电子科技集团公司第十八研究所 | Self-adaptive overcurrent protection circuit |
| CN106229954B (en) * | 2016-09-19 | 2018-08-24 | 中国电子科技集团公司第十八研究所 | Self-adaptive overcurrent protection circuit |
| CN110514883A (en) * | 2019-09-18 | 2019-11-29 | 中国电子科技集团公司第五十八研究所 | A kind of high pressure wide input range current sample operational amplifier circuit |
| CN114336499A (en) * | 2021-11-25 | 2022-04-12 | 河南嘉晨智能控制股份有限公司 | Scheme for adaptively adjusting over-current protection point |
| CN114336499B (en) * | 2021-11-25 | 2023-09-15 | 河南嘉晨智能控制股份有限公司 | Scheme for adaptively adjusting overcurrent protection point |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170426 Effective date of abandoning: 20180824 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170426 Effective date of abandoning: 20180824 |