CN108923391A - Energy storage PCS protection circuit against input over-voltage - Google Patents
Energy storage PCS protection circuit against input over-voltage Download PDFInfo
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- CN108923391A CN108923391A CN201810807370.4A CN201810807370A CN108923391A CN 108923391 A CN108923391 A CN 108923391A CN 201810807370 A CN201810807370 A CN 201810807370A CN 108923391 A CN108923391 A CN 108923391A
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Classifications
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- 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
- H02H7/10—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 converters; for rectifiers
- H02H7/12—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 converters; for rectifiers for static converters or rectifiers
- H02H7/125—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 converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—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 converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
A kind of energy storage PCS protection circuit against input over-voltage of electronic technology field,Including rectifier bridge DB1,Capacitor C20,Capacitor C21,Capacitor C22,Capacitor C23,Resistance R33,Resistance R34,Resistance R35,Resistance R36,Adjustable resistance BP,AND gate circuit U4,Three terminal regulator U5,Relay K1,Triode Q7,Diode D14,The input termination power AC1 of rectifier bridge DB1,Power supply AC2,One end of the positive output termination capacitor C20 of rectifier bridge DB1,One end of resistance R34,One end of resistance R36,The other end of capacitor C20 is grounded,One end of another termination capacitor C21 of resistance R34,One end of resistance R33,The input terminal of three terminal regulator U5,When input voltage is normal,Relay K1 normally closed interlock closure,Switching Power Supply works normally；When input voltage is higher than 265V, the coil of relay K1 obtains electric, and the normally closed interlock of relay K1 disconnects, and Switching Power Supply power-off protects switching power circuit.After input voltage restores normal, circuit is automatically into working condition.
Description
Technical field
The present invention relates to a kind of power circuits, specifically, being related to a kind of suitable for constant-current switch power source input over-voltage
Circuit is protected, electronic technology field is belonged to.
Background technique
Currently, traditional constant-current switch power source includes power circuit, output circuit, amplifying circuit, sample circuit, driving control
Circuit, pressure-stabilizing constant flow circuit and PFC correcting circuit processed.
In realizing process of the present invention, inventor's discovery has at least the following problems in the prior art：When input voltage mistake
Gao Shi is easy to burn out power circuit.
Summary of the invention
The technical problem to be solved by the present invention is to against the above deficiency, provide a kind of Switching Power Supply input overvoltage protection electricity
Road, after the protection circuit against input over-voltage, can achieve input voltage it is excessively high when cut off power supply in time, protection power source circuit
Purpose.
In order to solve the above technical problems, the present invention uses following technical scheme：The present invention includes power circuit, output electricity
Road, amplifying circuit, sample circuit, drive control circuit, pressure-stabilizing constant flow circuit, PFC correcting circuit, protection circuit against input over-voltage,
Protection circuit against input over-voltage includes rectifier bridge DB1, capacitor C20, capacitor C21, capacitor C22, capacitor C23, resistance R33, resistance
R34, resistance R35, resistance R36, adjustable resistance BP, AND gate circuit U4, three terminal regulator U5, relay K1, triode Q7, two poles
Pipe D14；
The one of the positive output termination capacitor C20 of input termination power AC1, the power supply AC2 of rectifier bridge DB1, rectifier bridge DB1
End, one end of resistance R34, resistance R36 one end, capacitor C20 the other end ground connection, another termination capacitor C21's of resistance R34
One end, one end of resistance R33, three terminal regulator U5 input terminal.
Further, in the present invention, the other end ground connection of the other end of capacitor C21, resistance R33, three terminal regulator U5
One end of output termination capacitor C22, AND gate circuit U4 power end, the other end ground connection of capacitor C22, resistance R36's is another
Terminate one end and the slide plate of adjustable resistance BP, one end of another terminating resistor R35 of adjustable resistance BP, capacitor C23 one end, with
An input terminal of gate circuit U4.
Further, in the present invention, the other end ground connection of the other end of resistance R35, capacitor C23, AND gate circuit U4
Another input termination power end of AND gate circuit U4, the cathode of diode D14, relay K1 coil one end, diode
The output of the collector of the anode of D14, another termination triode Q7 of relay K1 coil, AND gate circuit U4 terminates triode Q7
Base stage, the emitter ground connection of triode Q7, the normally closed interlock of relay K1 is connected between power circuit and outer network source.
After the invention adopts the above technical scheme, compared with prior art, have the following advantages that：When input voltage is normal,
AND gate circuit U4 input terminal is low level, and AND gate circuit U4 exports low level, and protection circuit is failure to actuate, relay K1 normally closed interlock
Closure, Switching Power Supply work normally；When input voltage is higher than 265V, it is high level that electric resistance partial pressure value, which increases, electric with door at this time
Two equal input high levels of input terminal of road U4, export high level, triode Q7 saturation conduction, the coil of relay K1 obtain it is electric,
The normally closed interlock of relay K1 disconnects, Switching Power Supply power-off.Protect switching power circuit.Input voltage restores normal
Afterwards, circuit is automatically into working condition.
Detailed description of the invention
Fig. 1 is the circuit block diagram of switching power circuit in the embodiment of the present invention；
Fig. 2 is the circuit diagram of switching power circuit in the embodiment of the present invention；
Fig. 3 is the circuit diagram of pressure-stabilizing constant flow circuit in the embodiment of the present invention；
Fig. 4 is the circuit diagram of protection circuit against input over-voltage in the embodiment of the present invention；
Wherein：1, power circuit, 2, output circuit, 3, DC load, 4, amplifying circuit, 5, sample circuit, 6, driving control
Circuit processed, 7, pressure-stabilizing constant flow circuit, 8, PFC correcting circuit, 9, protection circuit against input over-voltage.
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention, before the present embodiment is with technical solution of the present invention
It mentions, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following embodiments.
Embodiment
Embodiment, as shown in Figure 1, Figure 2, Figure 3 shows, a kind of Switching Power Supply protection circuit against input over-voltage, power circuit includes
The power circuit 1 of electrical connection, output circuit 2, amplifying circuit 4, sample circuit 5, drive control circuit 6, pressure-stabilizing constant flow circuit 7,
PFC correcting circuit 8 and protection circuit against input over-voltage 9.
Power circuit 1 includes diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, electricity
Hinder R1, resistance R2, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5 and switch transformer T, diode D1, diode
D2, diode D3, diode D4 composition rectifier bridge, switch transformer T has the first primary coil, the second primary coil and secondary
Grade coil, capacitor C3 connect between the anode and ground of rectifier bridge, and the anode of a termination rectifier bridge of resistance R1, resistance R1's is another
One end of termination capacitor C4, diode D5 cathode, the other end ground connection of capacitor C4, the anode of diode D5 connects the first primary line
One end of circle, the other end ground connection of the first primary coil, one end of capacitor C5, the one of resistance R2 terminate the anode of rectifier bridge, electricity
Holding the cathode of the other end of C5, another terminating diode D6 of resistance R2, the one of the second primary coil terminates the anode of rectifier bridge,
The anode of another terminating diode D6 of second primary coil, capacitor C5, resistance R2 and diode D6 form surge absorbing circuit,
Secondary coil connects output circuit 2.
Output circuit 2 include resistance R3, resistance R4, diode D7, diode D8, diode D9, capacitor C6, capacitor C7,
Capacitor C8, capacitor C9, one end of the anode of a terminating diode D7 of secondary coil, resistance R3, another termination electricity of resistance R3
Hold one end of C6, cathode, one end of capacitor C7, one end of capacitor C8, the pressure-stabilizing constant flow of another terminating diode D7 of capacitor C6
Circuit 7 and DC load 3, the other end of capacitor C7, the centre tap of another termination secondary coil of capacitor C8, capacitor C9 one
It holds, the cathode of diode D9, cathode, the pressure-stabilizing constant flow circuit 7 of another terminating diode D8 of capacitor C9, the anode of diode D8
The other end of secondary coil is connect, the anode of diode D9 connects pressure-stabilizing constant flow circuit 7, and resistance R4 is in parallel with diode D9, resistance R3,
Capacitor C6 is used to eliminate noise.DC load 3 is connected between out+ and out-.
Resistance R8, resistance R9, resistance R10, resistance R11, capacitor C11 and triode Q3, triode Q4 form amplifying circuit
4, the input terminal of amplifying circuit 4 connects sample circuit 5, and the output of amplifying circuit 4 terminates drive control circuit 6.
Sample circuit 5 includes photoelectrical coupler U2, output termination amplifying circuit 4, drive control circuit 6.Photoelectrical coupler
Anode, the cathode of U2 connects pressure-stabilizing constant flow circuit 7 respectively, and the voltage value of pressure-stabilizing constant flow circuit 7 is carried out voltage sampling.
Drive control circuit 6 includes driving chip U1, resistance R7, resistance R12, capacitor C10, diode D10, diode
D11, resistance R13, resistance R14, current-limiting resistance R15, field-effect tube Q1, the model SA7527 of driving chip U1, driving chip
One end of 1 foot connecting resistance R7 of U1, one end of resistance R12, capacitor C10 one end, the other end of resistance R12, capacitor C10 it is another
One terminates the output end of 2 feet of driving chip U1, amplifying circuit 4, the input terminal of another termination amplifying circuit 4 of resistance R7, two
The emitter of the anode of pole pipe D10, photoelectrical coupler U2, the cathode of diode D10 connect the collector of photoelectrical coupler U2, driving
8 feet of chip U1,3 feet of driving chip U1 connect PFC correcting circuit 8, and 5 feet of driving chip U1 connect power circuit 1 through resistance R6
The anode of middle diode D5,6 feet of driving chip U1, one end of the 7 foot connecting resistance R13 of driving chip U1, diode D11
Cathode, the other end of resistance R13, the anode of diode D11 connect the grid of field-effect tube Q1, and the source electrode of field-effect tube Q1 is through current limliting
Resistance R15 ground connection, resistance R14 are connected between the grid of field-effect tube Q1 and the source electrode of field-effect tube Q1, field-effect tube Q1's
Drain electrode connects the anode of diode D6 in power circuit 1, and 4 feet of driving chip U1 meet the source electrode of field-effect tube Q1, driving chip U1
8 feet the cathode of diode D5 in power circuit 1 is connect through resistance R5.
Pressure-stabilizing constant flow circuit 7 includes operational amplifier U3, resistance R24, resistance R25, resistance R26, resistance R27, resistance
R28, resistance R29, resistance R30, resistance R31, resistance R32, capacitor C16, capacitor C17, capacitor C18, capacitor C19, diode
D12, diode D13 and photo resistance R-G, 1 foot of the model AP4310 of operational amplifier U3, operational amplifier U3 are operation
1 signal output end of amplifier, 2 feet are 1 inversion signal input terminal of operational amplifier, and 3 feet are the input of 1 in-phase signal of operational amplifier
End, 4 feet are ground terminal, and 5 feet are 2 in-phase signal input terminal of operational amplifier, and 6 feet are 2 inversion signal input terminal of operational amplifier,
7 feet are 2 signal output end of operational amplifier, and 8 feet are power end.1 foot of operational amplifier U3 connects the cathode of diode D12, electricity
One end of R26 is hindered, the anode of diode D12 connects the anode of 2 feet of photoelectrical coupler U2, diode D13, diode D13's
Cathode meets one end of 7 feet of operational amplifier U3, resistance R30, one end of another termination capacitor C19 of resistance R30, capacitor C19
6 feet of another termination operational amplifier U3, resistance R31 one end, the anode of another terminating diode D9 of resistance R31, electricity
Hinder one end of another termination capacitor C16 of R26, one end of another terminating resistor R24 of capacitor C16, resistance R25 one end, electricity
The anode of another termination capacitor C8 of R24 is hindered, the other end of resistance R25 is grounded, the 2 foot connecting resistance R27's of operational amplifier U3
One end, one end of resistance R28, capacitor C18 one end, one end of another termination capacitor C17 of resistance R27, operational amplifier U3
8 feet, one end of resistance R32, diode D8 cathode, the other end ground connection of capacitor C17, another termination photoelectricity of resistance R32
1 foot of coupler U2, one end of 5 feet of another termination operational amplifier U3 of resistance R28, photo resistance R-G, photo resistance R-
Another termination of G is grounded through resistance R29, the other end ground connection of capacitor C18.
PFC correcting circuit 8 includes resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance
R22, resistance R23, capacitor C13, capacitor C14, triode Q5 and triode Q6, one end of resistance R16, resistance R17 a termination
One end of resistance R2 in power circuit 1, collection of the other end of resistance R16 through one end of resistance R18 connecting resistance R20, triode Q5
Electrode, the other end ground connection of resistance R20, the base stage of triode Q5 is hanging, and the emitter of triode Q5 connects triode through resistance R23
One end of the base stage of Q6, capacitor C13, the other end ground connection of capacitor C13, the emitter ground connection of triode Q6, triode Q6 current collection
3 feet of one end through resistance R22 connecting resistance R19 of pole, one end of resistance R21, one end of capacitor C14 and driving chip U1, resistance
The other end of R21 is grounded, the other end of another terminating resistor R17 of resistance R19, the other end ground connection of capacitor C14.
As shown in figure 4, protection circuit against input over-voltage 9 includes rectifier bridge DB1, capacitor C20, capacitor C21, capacitor C22, capacitor
C23, resistance R33, resistance R34, resistance R35, resistance R36, adjustable resistance BP, AND gate circuit U4, three terminal regulator U5, relay
K1, triode Q7, diode D14, input termination power AC1, the power supply AC2 of rectifier bridge DB1, the positive output end of rectifier bridge DB1
Connect one end of capacitor C20, one end of resistance R34, resistance R36 one end, capacitor C20 the other end ground connection, resistance R34 it is another
One end of termination capacitor C21, one end of resistance R33, three terminal regulator U5 input terminal, the other end, the resistance R33 of capacitor C21
Other end ground connection, one end of the output termination capacitor C22 of three terminal regulator U5, AND gate circuit U4 power end, capacitor C22's
Other end ground connection, one end of another termination adjustable resistance BP of resistance R36 and slide plate, another terminating resistor of adjustable resistance BP
One end of R35, one end of capacitor C23, AND gate circuit U4 an input terminal, the other end of resistance R35, capacitor C23 it is another
End ground connection, another input termination power end of AND gate circuit U4, the cathode of diode D14, relay K1 of AND gate circuit U4
One end of coil, the collector of the anode of diode D14, another termination triode Q7 of relay K1 coil, AND gate circuit U4
Output termination triode Q7 base stage, triode Q7 emitter ground connection, the normally closed interlock of relay K1 be connected on power supply electricity
Between road 1 and outer network source.
The rectified bridge DB1 rectification of 220V is inputted, capacitor C20 filtering obtains a DC voltage.This voltage is through resistance R33, electricity
R34 partial pressure is hindered, capacitor C21 is filtered into three terminal regulator U5 and provides input voltage, and three terminal regulator U5, which is exported, stablizes 5V voltage, gives
AND gate circuit U4 and the power supply of relay K1 circuit.An input of AND gate circuit U4 terminates high level, another input terminates at
On the bleeder circuit that resistance R35, resistance R36, adjustable resistance BP are formed, adjustable resistance BP is adjusted, when keeping input voltage normal, with
Gate circuit U4 input terminal is low level, and AND gate circuit U4 exports low level, and protection circuit is failure to actuate, and relay K1 normally closed interlock closes
It closes, Switching Power Supply works normally.
When input voltage is higher than 265V, it is high level that electric resistance partial pressure value, which increases, and the two of AND gate circuit U4 input at this time
It holds equal input high level, exports high level, triode Q7 saturation conduction, the coil of relay K1 obtains electric, and relay K1's is normally closed
Contact disconnects, Switching Power Supply power-off.Protect switching power circuit.After input voltage restores normal, circuit automatically into
Working condition.
It is power circuit 1, output circuit 2, amplifying circuit 4, sample circuit 5, drive control circuit 6, steady in above embodiments
Pressing constant-current circuit 7, PFC correcting circuit 8 can be other custom circuits, as long as can be realized its function.
One skilled in the art would recognize that the above specific embodiments are only exemplary, it is to make ability
Field technique personnel can better understand the content of present invention, should not be construed as limiting the scope of protection of the present invention, as long as
Technical solution improvements introduced according to the present invention each falls within protection scope of the present invention.
Claims (3)
1. a kind of energy storage PCS protection circuit against input over-voltage, including power circuit (1), output circuit (2), amplifying circuit (4),
Sample circuit (5), drive control circuit (6), pressure-stabilizing constant flow circuit (7), PFC correcting circuit (8), it is characterised in that further include defeated
Enter overvoltage crowbar (9), protection circuit against input over-voltage (9) includes rectifier bridge DB1, capacitor C20, capacitor C21, capacitor C22, electricity
Hold C23, resistance R33, resistance R34, resistance R35, resistance R36, adjustable resistance BP, AND gate circuit U4, three terminal regulator U5, relay
Device K1, triode Q7, diode D14；
One end of the positive output termination capacitor C20 of input termination power AC1, the power supply AC2 of rectifier bridge DB1, rectifier bridge DB1, electricity
One end of R34, one end of resistance R36 are hindered, the other end of capacitor C20 is grounded, one end of another termination capacitor C21 of resistance R34,
One end of resistance R33, three terminal regulator U5 input terminal.
2. energy storage PCS protection circuit against input over-voltage according to claim 1, it is characterised in that the capacitor C21's is another
One end, resistance R33 other end ground connection, one end of the output termination capacitor C22 of three terminal regulator U5, AND gate circuit U4 power supply
End, the other end ground connection of capacitor C22, one end of another termination adjustable resistance BP of resistance R36 and slide plate, adjustable resistance BP's is another
One end of one terminating resistor R35, one end of capacitor C23, AND gate circuit U4 an input terminal.
3. energy storage PCS protection circuit against input over-voltage according to claim 2, it is characterised in that the resistance R35's is another
One end, capacitor C23 the other end ground connection, AND gate circuit U4 another input termination AND gate circuit U4 power end, diode
One end of the cathode of D14, relay K1 coil, the anode of diode D14, another termination triode Q7 of relay K1 coil
Collector, the base stage of the output termination triode Q7 of AND gate circuit U4, the emitter ground connection of triode Q7, relay K1's is normally closed
Contact is connected between power circuit (1) and outer network source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810807370.4A CN108923391A (en) | 2018-07-21 | 2018-07-21 | Energy storage PCS protection circuit against input over-voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810807370.4A CN108923391A (en) | 2018-07-21 | 2018-07-21 | Energy storage PCS protection circuit against input over-voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108923391A true CN108923391A (en) | 2018-11-30 |
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ID=64417019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810807370.4A Pending CN108923391A (en) | 2018-07-21 | 2018-07-21 | Energy storage PCS protection circuit against input over-voltage |
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| Country | Link |
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| CN (1) | CN108923391A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754837A (en) * | 2015-04-04 | 2015-07-01 | 张冰莹 | Input over-voltage protection constant-current power supply |
| CN106953377A (en) * | 2017-02-27 | 2017-07-14 | 国网福建省电力有限公司 | Suitable for the mobile energy storage for power supply system control method of multiple access scene |
-
2018
- 2018-07-21 CN CN201810807370.4A patent/CN108923391A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754837A (en) * | 2015-04-04 | 2015-07-01 | 张冰莹 | Input over-voltage protection constant-current power supply |
| CN106953377A (en) * | 2017-02-27 | 2017-07-14 | 国网福建省电力有限公司 | Suitable for the mobile energy storage for power supply system control method of multiple access scene |
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Application publication date: 20181130 |