CN106160071A - Short-circuit protection circuit - Google Patents
Short-circuit protection circuit Download PDFInfo
- Publication number
- CN106160071A CN106160071A CN201610502888.8A CN201610502888A CN106160071A CN 106160071 A CN106160071 A CN 106160071A CN 201610502888 A CN201610502888 A CN 201610502888A CN 106160071 A CN106160071 A CN 106160071A
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- 238000005070 sampling Methods 0.000 claims abstract description 26
- 230000000295 complement effect Effects 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000005669 field effect Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 9
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 230000000474 nursing effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 206010068052 Mosaicism Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H02J7/0026—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention provides a kind of short-circuit protection circuit; relate to power safety technology field; this circuit includes: sampling unit, comparing unit and short-circuit protection unit; described sampling unit; for gathering the electric current of equalizing circuit to be protected; and export to described comparing unit; described comparing unit; for the electric current of described equalizing circuit is compared with the current threshold preset; if judging, the electric current knowing described equalizing circuit more than the current threshold preset, then controls described short-circuit protection unit and disconnects the connection of described equalizing circuit and DC source.The benefit electric-type equalizing circuit that the present invention provides, can fast and effeciently protect benefit electric-type equalizing circuit, improve the safety of circuit.
Description
Technical field
The present invention relates to power safety technology field, be specifically related to a kind of short-circuit protection circuit.
Background technology
Owing to lithium battery monomer is in the difference manufactured, lithium battery is caused to have one in groups time
Cause sex chromosome mosaicism, and due to set of cells temperature contrast in use, cause lithium battery group
Along with the increase of cycle-index, this discordance is gradually increased, it is therefore desirable to equalizing circuit pair
It equalizes, and improves the concordance of set of cells.
Balanced way is divided into active equalization and passive equilibrium, for active equalization, uses at present
Many is to mend electric-type equilibrium.There is the risk of short-circuit failure in equalizing circuit, therefore needs in use
It is protected.There is problems in that currently for battery balanced short-circuit protection
When 1, being controlled by software, short circuit response time is longer, to equalizer switch device and battery
Group itself causes damage, and the inefficacy of software simultaneously can cause equalizing circuit to there is unprotect state.
2, relying on the reliability of equalizing circuit self, causing equalizing circuit short-circuit failure to be in can not
The state of control, is likely to result in lithium battery group discharge and recharge safety issue.
Summary of the invention
(1) solve the technical problem that
The technical problem to be solved in the present invention is: when mending electric-type equalizing circuit short circuit, the soonest
Speed protects benefit electric-type equalizing circuit and set of cells effectively.
(2) technical scheme
For solving the problems referred to above, the invention provides a kind of short-circuit protection circuit, including sampling unit,
Comparing unit and short-circuit protection unit；
Wherein, described sampling unit is for gathering the electric current of equalizing circuit to be protected and defeated
Go out to described comparing unit；
Described comparing unit, for by the electric current of described equalizing circuit and default current threshold ratio
Relatively, if judging, the electric current knowing described equalizing circuit more than the current threshold preset, then controls institute
State short-circuit protection unit and disconnect the connection of described equalizing circuit and DC source；
Described short-circuit protection unit includes drive circuit and protective switch of the short circuit；
Described protective switch of the short circuit includes N-channel enhancement mode MOSFET；
Described drive circuit includes the first dropping resistor；First shunt resistance；First current-limiting resistance；
Supplying resistance；Stabilivolt；Class B push-pull formula complementary symmetry power amplifier circuit；
The anode of described stabilivolt is connected with the source electrode of described metal-oxide-semiconductor field effect transistor；Described stabilivolt
Negative electrode be connected by described first dropping resistor with the grid of described metal-oxide-semiconductor field effect transistor；Described
Stabilivolt the first shunt resistance in parallel；The negative electrode of described stabilivolt passes through the first current-limiting resistance and institute
The outfan stating class B push-pull formula complementary symmetry power amplifier circuit is connected；
The input of described class B push-pull formula complementary symmetry power amplifier circuit by described supplying resistance with
Power supply connects；
The input of described class B push-pull formula complementary symmetry power amplifier circuit connects fault control signal
Input.
Preferably, described supplying resistance passes through pull down resistor earth terminal.
Preferably, described drive circuit also includes light emitting diode；The anode of described light emitting diode
It is connected by the second dropping resistor with the outfan of class B push-pull formula complementary symmetry power amplifier circuit；Institute
State the minus earth end of light emitting diode.
Preferably, described class B push-pull formula complementary symmetry power amplifier circuit includes a NPN audion
With a PNP triode；The emitter stage of described NPN audion and described PNP triode
As the outfan of described class B push-pull formula amplifying circuit after emitter stage connection；Described NPN tri-pole
The base stage of pipe amplifies electricity as described class B push-pull formula after being connected with the base stage of described PNP triode
The input on road；The colelctor electrode of described NPN audion connects power supply；Described PNP triode
Grounded collector end.
Described drive circuit also includes diode, and described diode is with described first current-limiting resistance also
Connection, the anode of described diode is connected with the negative electrode of described light emitting diode, described diode
Negative electrode is connected with the outfan of described class B push-pull formula complementary symmetry power amplifier circuit.
Described euqalizing current sample circuit includes nursing one's health resistance；First filter capacitor；Difference is asked to amplify electricity
Road；Limiter diode group；
Described poor amplifying circuit is asked to include integrated operational amplifier；
Described conditioning resistance asks first input end and second input of poor amplifying circuit described in being connected to
Between；Described the second input seeking poor amplifying circuit, by described first filter capacitor ground connection；
Described limiter diode is connected to in-phase input end and the anti-phase input of described integrated operational amplifier
Between end, constitute double limiting diode；
Through conditioning resistance conditioning and poor amplifying circuit is asked to put from the current signal of sampling unit collection
After big, output sample rate current is to comparing unit.
Preferably, described integrated operational amplifier uses simplex power mode.
Described comparing unit includes euqalizing current threshold circuit；DC balance resistance；Voltage ratio is relatively
Device；Pull-up resistor；Second filter capacitor；3rd dropping resistor；4th dropping resistor；Second
Shunt resistance；IGCT；Optical coupled switch；
Described euqalizing current threshold circuit includes the first resistance and the second resistance, described first resistance
One end connect power supply, the other end connects the second resistance；The other end ground connection of described second resistance
End；
Described optical coupled switch has four pins；
The inverting input of described voltage comparator and described first resistance and described second resistance it
Between position be connected；Described DC balance resistance connects with the normal phase input end of described voltage comparator
Connect；Described pull-up resistor one end is connected with power supply, one end and the outfan of described voltage comparator
Connect；The outfan of described voltage comparator is by described 3rd dropping resistor and described IGCT
Gate pole connects；Described second filter capacitor one terminates described gate circuit transistor gate, other end earth terminal；
Described second shunt resistance one end connects the gate pole of IGCT, other end earth terminal；Described brilliant lock
The minus earth end of pipe, anode is by described 4th dropping resistor and the second of described optical coupled switch
Pin is connected.
Preferably, described comparing unit also includes light emitting diode and the 5th dropping resistor；Described
The anode of light emitting diode is by the second pin of described 5th dropping resistor with described optical coupled switch
Being connected, the negative electrode of described light emitting diode is connected with the anode of IGCT.
(3) beneficial effect
The invention provides a kind of short-circuit protection circuit, sampling unit therein, comparing unit with
And short-circuit protection unit uses devices at full hardware design, it is not related to software section, it is to avoid software failure
Cause the problem that short-circuit protection lost efficacy.
It addition, by the drive circuit control to protective switch of the short circuit break-make, it is achieved that to equilibrium
The protection of circuit, i.e. when equalizing circuit short circuit, can cut off equalizing circuit, response time immediately
Short.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below
The accompanying drawing used required in embodiment or description of the prior art will be briefly described, aobvious and
Easily insight, the accompanying drawing in describing below is only some embodiments of the present invention, for this area
From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to according to these
Accompanying drawing obtains other accompanying drawing.
Fig. 1 is the short-circuit protection circuit embodiment theory diagram provided according to the present invention；
Fig. 2 is the drive circuit embodiment circuit signal on circuit system provided according to the present invention
Figure；
Fig. 3 is the sampling unit embodiment electrical block diagram provided according to the present invention；
Fig. 4 is the comparing unit embodiment electrical block diagram provided according to the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
Be fully described by, it is clear that described embodiment be a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Make the every other embodiment obtained under creative work premise, broadly fall into present invention protection
Scope.
As it is shown in figure 1, the invention provides the embodiment of a kind of short-circuit protection circuit, including adopting
Sample unit, comparing unit, drive circuit and protective switch of the short circuit；
Sampling unit carries out electric current by sampling resistor to the electric current of equalizing circuit to be protected and adopts
Collection, the electric current of collection is compared with the current threshold preset by comparing unit, if judging to know institute
The electric current stating equalizing circuit is more than the current threshold preset, then drive circuit control short-circuit protection leaves
Close the connection disconnecting equalizing circuit with DC source；
Protective switch of the short circuit has three pins, the second pin and the isolated DC source in equalizing circuit
Being connected, the 3rd pin is connected with equalizer switch circuit by sampling resistor, the first pin and driving
Circuit is connected.
Wherein, sampling unit, comparing unit and drive circuit and protective switch of the short circuit use
Devices at full hardware designs, and is not related to software section, it is to avoid software failure causes the short-circuit protection to lose efficacy
Problem.It addition, by the drive circuit control to protective switch of the short circuit break-make, it is achieved that to all
The protection of weighing apparatus circuit, i.e. when equalizing circuit short circuit, can cut off equalizing circuit, during response immediately
Between short.
In the specific implementation, drive circuit here can be accomplished in several ways, below to it
Middle a kind of embodiment is specifically introduced, as in figure 2 it is shown, be the drive circuit of the present embodiment
Circuit diagram on circuit system, the anode of stabilivolt D3 and metal-oxide-semiconductor field effect transistor U3
Source electrode be connected, the grid of negative electrode and metal-oxide-semiconductor field effect transistor U3 is by the first dropping resistor R5
It is connected；Stabilivolt D3 the first shunt resistance R6 in parallel；The negative electrode of stabilivolt passes through the first current limliting
Resistance R1 is connected with the outfan of class B push-pull formula complementary symmetry power amplifier circuit；Class B push-pull formula is mutual
The input mending power amplification circuit is connected with power supply after supplying resistance R2 series connection；MOS field
The source electrode of effect pipe U3 is connected with equalizer switch U1 by sampling resistor R7；From sampling resistor
R7 two ends output Is+ and Is-is in collecting unit.
Supplying resistance R2 passes through pull down resistor R3 earth terminal.
The anode of light emitting diode D2 and the outfan of class B push-pull formula complementary symmetry power amplifier circuit
Connected by the second dropping resistor R4；Minus earth end.
Class B push-pull formula complementary symmetry power amplifier circuit includes NPN type triode Q1 and positive-negative-positive three
Pole pipe Q2；The colelctor electrode of Q1 connects power supply；After the emitter stage of Q1 is connected with the emitter stage of Q2
Outfan as class B push-pull formula amplifying circuit；The base stage of Q1 is made after being connected with the base stage of Q2
Input for class B push-pull formula amplifying circuit；The grounded collector end of Q2.
Diode D1 and the first current-limiting resistance R1 is in parallel, diode D1 anode and light-emitting diodes
The negative electrode of pipe D2 is connected, the negative electrode of diode D1 and class B push-pull formula complementary symmetry power amplifier circuit
Outfan be connected.
Described drive circuit works principle is as follows:
Input drive signal is divided into low level signal and high level signal, when low level signal passes through
When the input of class B push-pull formula complementary symmetry power amplifier circuit inputs, drive metal-oxide-semiconductor field effect transistor
U3 ends, and equalizing circuit carries out short-circuit protection, now light emitting diode D2 cut-off.
When high level signal inputs, amplified by class B push-pull formula complementary symmetry power amplifier circuit,
Again after the first current-limiting resistance R1 current limliting and the first dropping resistor R5 blood pressure lowering, drive MOS
Field effect transistor U3 turns on, and equalizing circuit normally works, now light emitting diode D2 conducting, rises
Effect to instruction.
Diode D1, the second dropping resistor R4 and light emitting diode D2 are formed and quickly discharge MOS
Junction capacitance voltage circuit.
Stabilivolt D3, the first shunt resistance R6 and the first current-limiting resistance R1 form mu balanced circuit,
The conducting of protection metal-oxide-semiconductor field effect transistor, prevents voltage excessive and punctures.
Pull down resistor R3, as the load of+15V, plays the effect of voltage stabilizing, prevents from loading too small,
Voltage instability.
In the specific implementation, sampling unit here can be accomplished in several ways, below right
One of which embodiment is specifically introduced, as it is shown on figure 3, be the sampling list of the present embodiment
Unit's electrical block diagram:
Resistance R8, R10, R11, R12 and integrated operational amplifier U4 composition ask difference to amplify electricity
Road, wherein resistance R8 one end is the first input end seeking poor amplifying circuit, the other end and integrated fortune
The reverse input end calculating amplifier U4 connects；Resistance R12 mono-terminates integrated operational amplifier U4
Reverse input end, another termination operational amplifier U4 outfan；Resistance R10 one end is
Seek the second input of poor amplifying circuit, the input in the same direction of another termination integrated operational amplifier U4
End；Resistance R11 mono-terminates the input in the same direction of integrated operational amplifier U4, another termination
2.048V reference voltage.
Conditioning resistance R9 is connected to ask between the first input end of poor amplifying circuit and the second input；
Seek the second input of poor amplifying circuit, by the first filter capacitor C1 ground connection.
Two diodes D4, D5 are connected to the in-phase input end of integrated operational amplifier U4 and anti-phase
Between input, constitute double limiting diode.
The operation principle of described sampling unit is as follows:
The current signal gathered from sampling resistor R7 two ends is through nursing one's health the conditioning of resistance R9 and asking
Difference amplifying circuit exports current sampling data to euqalizing current comparison circuit after amplifying；Difference is asked to amplify electricity
Resistance R11 mono-in road terminates the input in the same direction of integrated operational amplifier U4, and another terminates base
Quasi-voltage, it is possible to realize high-precision collection.
In the specific implementation, comparing unit here can be accomplished in several ways, below right
One of which embodiment is specifically introduced, as shown in Figure 4, for the comparison list of the present embodiment
The electrical block diagram of unit, including euqalizing current threshold circuit；DC balance resistance R15；
Voltage comparator U5；Pull-up resistor R16；Second filter capacitor C1；3rd dropping resistor R17；
4th dropping resistor R19；Second shunt resistance R18；IGCT D7；Optical coupled switch U6.
Euqalizing current threshold circuit is composed in series by resistance R13 and resistance R14, the electricity after series connection
Resistance one end connects power supply, one end earth terminal.
IGCT D7 has gate pole, anode and negative electrode.
Optical coupled switch U6 has four pins；
Position between inverting input and resistance R13 and the resistance R14 of voltage comparator U5
Being connected, the normal phase input end of DC balance resistance R15 and voltage comparator U5 is connected；Pull-up
Resistance R16 one end is connected with power supply, and one end is connected with the outfan of voltage comparator U5；Electricity
The outfan of pressure comparator U5 is connected by the gate pole of the 3rd dropping resistor R17 and IGCT D7；
Second filter capacitor C1 mono-terminates the gate pole of IGCT D7, other end earth terminal；Second shunting
Resistance R18 one end connects the gate pole of IGCT D7, other end earth terminal；The moon of IGCT D7
Pole earth terminal, the anode the second pin phase by the 4th dropping resistor R19 and optical coupled switch U6
Even.
The anode of light emitting diode D6 by the 4th dropping resistor R19 and optical coupled switch U6 the
Two pins are connected, and the negative electrode of light emitting diode D6 is connected with the anode of IGCT D7.
Described comparing unit operation principle is as follows:
From the current sampling data of sampling unit output, it is transferred to electricity by DC balance resistance R15
Pressure comparator U5, with default euqalizing current protection value by compared with comparator U5, if
Current sampling data is more than euqalizing current threshold value, then U5 exports high level, drives IGCT D7 to lead
Logical, then power supply VCC, optical coupled switch U6, the 4th dropping resistor R19, light emitting diode D6,
IGCT D7, GND loop turns on, the three-prong of optical coupled switch U6 and the short circuit of the 4th pin,
Output low level signal is to the input of the class B push-pull formula complementary symmetry power amplifier circuit in drive circuit
End, metal-oxide-semiconductor field effect transistor U3 disconnects, equalizing circuit is carried out short-circuit protection；
If current sampling data is less than euqalizing current threshold value, then optical coupled switch U6 output high level letter
Number to the input of the class B push-pull formula complementary symmetry power amplifier circuit in drive circuit, MOS field is imitated
Should pipe U3 adhesive, equalizing circuit normally works.
By changing the size of the resistance of R13 and R14, different current thresholds can be set.
It should be noted that in this article, the relational terms of such as first and second or the like is only
Only it is used for separating an entity or operation with another entity or operating space, and not necessarily
Require or imply and there is the relation of any this reality or suitable between these entities or operation
Sequence.And, term " includes ", " comprising " or its any other variant are intended to nonexcludability
Comprise, so that include the process of a series of key element, method, article or equipment not only
Including those key elements, but also include other key elements being not expressly set out, or also include
The key element intrinsic for this process, method, article or equipment.There is no more restriction
In the case of, statement " including ... " key element limited, it is not excluded that including described wanting
Process, method, article or the equipment of element there is also other identical element.
Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, those of ordinary skill in the art
It is understood that the technical scheme described in foregoing embodiments still can be modified by it,
Or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, not
The essence making appropriate technical solution departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a short-circuit protection circuit, it is characterised in that including: sampling unit, comparing unit
And short-circuit protection unit；
Wherein, described sampling unit is for gathering the electric current of equalizing circuit to be protected and defeated
Go out to described comparing unit；
Described comparing unit, for by the electric current of described equalizing circuit and default current threshold ratio
Relatively, if judging, the electric current knowing described equalizing circuit more than the current threshold preset, then controls institute
State short-circuit protection unit and disconnect the connection of described equalizing circuit and DC source；
Described short-circuit protection unit includes drive circuit and protective switch of the short circuit；
Described protective switch of the short circuit includes N-channel enhancement mode MOSFET；
Described drive circuit includes the first dropping resistor；First shunt resistance；First current-limiting resistance；
Supplying resistance；Stabilivolt；Class B push-pull formula complementary symmetry power amplifier circuit；
The anode of described stabilivolt is connected with the source electrode of described metal-oxide-semiconductor field effect transistor；Described stabilivolt
Negative electrode be connected by described first dropping resistor with the grid of described metal-oxide-semiconductor field effect transistor；Described
Stabilivolt the first shunt resistance in parallel；The negative electrode of described stabilivolt passes through the first current-limiting resistance and institute
The outfan stating class B push-pull formula complementary symmetry power amplifier circuit is connected；
The input of described class B push-pull formula complementary symmetry power amplifier circuit by described supplying resistance with
Power supply connects；
The input of described class B push-pull formula complementary symmetry power amplifier circuit connects fault control signal
Input.
2. short-circuit protection circuit as claimed in claim 1, it is characterised in that: described power supply electricity
Resistance is by pull down resistor earth terminal.
3. short-circuit protection circuit as claimed in claim 1, it is characterised in that: described driving electricity
Road also includes light emitting diode；The anode of described light emitting diode and class B push-pull formula complementary power
The outfan of amplifying circuit is connected by the second dropping resistor；The negative electrode of described light emitting diode connects
Ground end.
4. short-circuit protection circuit as claimed in claim 1, it is characterised in that: described Class B pushes away
Pull complementary symmetry power amplifier circuit includes a NPN audion and a PNP triode；Described
The emitter stage of NPN audion be connected with the emitter stage of described PNP triode after as described Class B
The outfan of push-pull type amplifying circuit；The base stage of described NPN audion and described PNP triode
Base stage connect after as the input of described class B push-pull formula amplifying circuit；Described NPN tri-pole
The colelctor electrode of pipe connects power supply；The grounded collector end of described PNP triode.
5. the short-circuit protection circuit as described in Claims 1-4 is arbitrary, it is characterised in that: institute
Stating drive circuit and also include diode, described diode is in parallel with described first current-limiting resistance, institute
The negative electrode of the anode and described light emitting diode of stating diode is connected, the negative electrode of described diode with
The outfan of described class B push-pull formula complementary symmetry power amplifier circuit is connected.
6. short-circuit protection circuit as claimed in claim 5, it is characterised in that: described sampling is single
Unit includes nursing one's health resistance；First filter capacitor；Seek poor amplifying circuit；Limiter diode group；
Described poor amplifying circuit is asked to include integrated operational amplifier；
Described conditioning resistance asks first input end and second input of poor amplifying circuit described in being connected to
Between；Described the second input seeking poor amplifying circuit, by described first filter capacitor ground connection；
Described limiter diode is connected to in-phase input end and the anti-phase input of described integrated operational amplifier
Between end, constitute double limiting diode；
Through conditioning resistance conditioning and poor amplifying circuit is asked to put from the current signal of sampling unit collection
After big, output sample rate current is to comparing unit.
7. short-circuit protection circuit as claimed in claim 6, it is characterised in that: described integrated fortune
Calculate amplifier and use simplex power mode.
8. short-circuit protection circuit as claimed in claim 7, it is characterised in that: comparing unit bag
Include euqalizing current threshold circuit；DC balance resistance；Voltage comparator；Pull-up resistor；Second
Filter capacitor；3rd dropping resistor；4th dropping resistor；Second shunt resistance；IGCT；
Optical coupled switch；
Described euqalizing current threshold circuit includes the first resistance and the second resistance, described first resistance
One end connects power supply, and the other end connects the second resistance；The other end earth terminal of described second resistance；
Described optical coupled switch has four pins；
The inverting input of described voltage comparator and described first resistance and described second resistance it
Between position be connected；Described DC balance resistance connects with the normal phase input end of described voltage comparator
Connect；Described pull-up resistor one end is connected with power supply, one end and the outfan of described voltage comparator
Connect；The outfan of described voltage comparator is by described 3rd dropping resistor and described IGCT
Gate pole connects；Described second filter capacitor one terminates described gate circuit transistor gate, other end earth terminal；
Described second shunt resistance one end connects the gate pole of IGCT, other end earth terminal；Described brilliant lock
The minus earth end of pipe, anode is by described 4th dropping resistor and the second of described optical coupled switch
Pin is connected.
9. short-circuit protection circuit as claimed in claim 8, it is characterised in that: described the most single
Unit also includes light emitting diode and the 5th dropping resistor；The anode of described light emitting diode passes through institute
State the 5th dropping resistor to be connected with the second pin of described optical coupled switch, described light emitting diode
Negative electrode is connected with the anode of IGCT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502888.8A CN106160071B (en) | 2016-06-29 | 2016-06-29 | Short-circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502888.8A CN106160071B (en) | 2016-06-29 | 2016-06-29 | Short-circuit protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106160071A true CN106160071A (en) | 2016-11-23 |
| CN106160071B CN106160071B (en) | 2019-05-07 |
Family
ID=57350492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610502888.8A Active CN106160071B (en) | 2016-06-29 | 2016-06-29 | Short-circuit protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106160071B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828421A (en) * | 2018-04-09 | 2018-11-16 | 厦门科华恒盛股份有限公司 | A kind of thyristor malfunction detection system and method |
| CN111225478A (en) * | 2018-11-23 | 2020-06-02 | 明纬(广州)电子有限公司 | Switch module protection circuit |
| CN112491005A (en) * | 2020-11-05 | 2021-03-12 | 中国航空工业集团公司西安航空计算技术研究所 | Recoverable quick protection circuit of 28V/on output interface circuit |
| CN113359418A (en) * | 2021-06-18 | 2021-09-07 | 中国北方发动机研究所(天津) | Control circuit for improving PID overshoot and response time |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102668305A (en) * | 2009-12-22 | 2012-09-12 | Abb研究有限公司 | Battery energy storage system with short circuit protection, and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108828421A (en) * | 2018-04-09 | 2018-11-16 | 厦门科华恒盛股份有限公司 | A kind of thyristor malfunction detection system and method |
| CN111225478A (en) * | 2018-11-23 | 2020-06-02 | 明纬(广州)电子有限公司 | Switch module protection circuit |
| CN111225478B (en) * | 2018-11-23 | 2022-06-07 | 明纬(广州)电子有限公司 | Switch module protection circuit |
| CN112491005A (en) * | 2020-11-05 | 2021-03-12 | 中国航空工业集团公司西安航空计算技术研究所 | Recoverable quick protection circuit of 28V/on output interface circuit |
| CN112491005B (en) * | 2020-11-05 | 2023-07-21 | 中国航空工业集团公司西安航空计算技术研究所 | Recoverable quick protection circuit of 28V/on output interface circuit |
| CN113359418A (en) * | 2021-06-18 | 2021-09-07 | 中国北方发动机研究所(天津) | Control circuit for improving PID overshoot and response time |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106160071B (en) | 2019-05-07 |
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Denomination of invention: High power transistor fast short-circuit protective circuit Effective date of registration: 20191011 Granted publication date: 20190507 Pledgee: Hefei Xingtai financing guarantee Group Ltd. Pledgor: ANHUI RNTEC TECHNOLOGY Co.,Ltd. Registration number: Y2019340000112 |
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Denomination of invention: Short circuit protection circuit Effective date of registration: 20220506 Granted publication date: 20190507 Pledgee: China Construction Bank Corporation Hefei Shushan sub branch Pledgor: ANHUI RNTEC TECHNOLOGY Co.,Ltd. Registration number: Y2022980004761 |
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