CN208299684U - High power switching power supply anti-surge circuit - Google Patents
High power switching power supply anti-surge circuit Download PDFInfo
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- CN208299684U CN208299684U CN201820975631.9U CN201820975631U CN208299684U CN 208299684 U CN208299684 U CN 208299684U CN 201820975631 U CN201820975631 U CN 201820975631U CN 208299684 U CN208299684 U CN 208299684U
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Abstract
The utility model discloses a kind of high power switching power supply anti-surge circuits, including filter circuit, thermistor, varistor, rectifier bridge, the first electrolytic capacitor, the second electrolytic capacitor, relay, control circuit, accessory power supply, two power inputs of filter circuit are connect with the two poles of the earth of alternating current input power supplying respectively, first output end of filter circuit is connected by the first input end of thermistor and rectifier bridge, and the second output terminal of filter circuit and the second input terminal of rectifier bridge connect；Relay has contact switch, trigger winding, and contact switch is connected in parallel with thermistor, and two input terminals of trigger winding and two output ends of control circuit connect, and two input terminals of control circuit are connect with accessory power supply, the first electrolytic capacitor respectively.The high power switching power supply anti-surge circuit in use, the surge current of Switching Power Supply can be reduced, while can improve the service efficiency of Switching Power Supply in large power supply.
Description
Technical field
The utility model relates to field of switch power more particularly to a kind of high power switching power supply anti-surge circuits.
Background technique
Anti-surging Switching Power Supply can only can effectively reduce surge current, but large power supply in small-power power at present
In cannot effectively use, in order to be effectively reduced Switching Power Supply starting when surge current must increase temperature-sensitive resistance value and power, phase
It should will reduce the efficiency of Switching Power Supply.The Switching Power Supply being especially used on light of stage, often several even tens desk lamps
Have while powering on, Switching Power Supply causes surge current very big, can interfere the normal work of other electrical equipments.
Summary of the invention
The purpose of this utility model is to provide a kind of high power switching power supply anti-surge circuit, the high power switching power supplies
Anti-surge circuit in use, the surge current of Switching Power Supply can be reduced, while can improve making for Switching Power Supply in large power supply
Use efficiency.
Its technical solution is as follows:
High power switching power supply anti-surge circuit, including filter circuit, thermistor, varistor, rectifier bridge, the first electricity
Solve capacitor, the second electrolytic capacitor, relay, control circuit, accessory power supply, two power inputs difference of the filter circuit
Connect with the two poles of the earth of alternating current input power supplying, the first output end of filter circuit pass through the thermistor and the rectifier bridge the
The connection of one input terminal, the second output terminal of filter circuit are connect with the second input terminal of the rectifier bridge；The varistor with
Two input terminals of the rectifier bridge are connected in parallel；First electrolytic capacitor, the second electrolytic capacitor respectively with the rectifier bridge
Output end be connected in parallel；
The relay has contact switch, trigger winding, and the contact switch is connected in parallel with the thermistor, institute
Two input terminals for stating trigger winding are connect with two output ends of the control circuit, two input terminals of the control circuit
It is connect respectively with accessory power supply, the first electrolytic capacitor.
The filter circuit includes the first filter capacitor, the second filter capacitor, first filter capacitor and described second
Filter capacitor is connected in series.
The filter circuit further includes first capacitor, first resistor, the second capacitor, the first capacitor, first resistor point
It is not connected in parallel with first filter capacitor, second capacitor is connected in parallel with second filter capacitor.
The filter circuit further includes third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the third capacitor,
Four capacitors anode connect respectively with two input terminals of second filter capacitor, the third capacitor, the 4th capacitor bear
Pole ground line；5th capacitor, the 6th capacitor anode connect respectively with two output ends of the filter circuit, described the
The cathode ground line of five capacitors, the 6th capacitor.
The control circuit includes voltage detecting circuit, trigger switch circuit, the anode of the voltage detecting circuit and institute
State the connection of the first electrolytic capacitor, the cathode ground connection of the voltage detecting circuit；The trigger switch circuit have triggering input terminal,
Power input, ground wire connecting pin, the triggering input terminal are connect with the output end of the voltage detecting circuit, and the power supply is defeated
Enter end to connect with the accessory power supply, the ground wire connecting pin ground line.
The voltage detecting circuit includes second resistance, 3rd resistor, the 4th resistance, the anode of the second resistance and institute
The connection of the first electrolytic capacitor is stated, the 3rd resistor, the 4th resistance and the second resistance are connected in series, the 4th resistance
The anode of cathode ground line, the 4th resistance is connect with the triggering input terminal.
The trigger switch circuit include the first triode, the second triode, the 5th resistance, the 6th resistance, the 7th resistance,
Zener diode, the 5th resistance, the anode of the 7th resistance, the emitter of the second triode and the power input connect
It connects, the 6th resistance and the 5th resistance are connected in series, the cathode of the 6th resistance and the collection of first triode
Electrode connection；
The base stage of first triode is connect with the triggering input terminal, the emitter of first triode, the 7th
The cathode of resistance is connect with the anode of the zener diode, the cathode ground line of the zener diode；Two or three pole
The base stage of pipe is connect with the cathode of the 5th resistance, and the collector of second triode and the anode of the trigger winding connect
It connects.
The trigger switch circuit further includes the 8th resistance, the 7th capacitor, the two poles of the earth of the 8th resistance respectively with it is described
Trigger the collector connection of input terminal, the second triode, the collector of the anode and second triode of the 7th capacitor
Connection, the cathode ground line of the 7th capacitor.
The trigger switch circuit further includes first diode, anode and the trigger winding of the first diode
Anode connection, the cathode ground line of the first diode.
It should be understood that
Aforementioned " first, second ... " does not represent specific quantity and sequence, is only used for the differentiation to title.
The advantages of below to the utility model or principle are illustrated:
1, this high power switching power supply anti-surge circuit includes filter circuit, thermistor, varistor, rectifier bridge,
One electrolytic capacitor, the second electrolytic capacitor, relay, control circuit, accessory power supply, when the power source is activated, alternating current energization moment warp
Filter circuit, thermistor and rectifier bridge is crossed to charge to the first electrolytic capacitor, the second electrolytic capacitor；Temperature-sensitive is concatenated in electric power loop
Resistance can thus cause utility grid very big if we can be considered as immediate current infinity without thermistor
Impact；At this moment thermistor just plays prevents high current input action, but starts to work normally after power initiation, temperature-sensitive electricity
Resistance is still gone here and there in circuit, and energy is consumed, and as the power of power supply increases, resistance value and power also increase, will consume more
More energy；
The resistor coupled in parallel that first electrolytic capacitor, the second electrolytic capacitor charging transient are equivalent to resistance value very little is exported in rectifier bridge
End, when the first electrolytic capacitor, the second electrolytic capacitor both ends voltage with rising, be closed relay by control circuit, i.e.,
Two terminal shortcircuit of thermistor, input current are directly over relay to load supplying；
The resistance value of thermistor can be improved in power initiation electric current in this process, reduces surge current；When delay one
Section time relay closure, electric current are directly over rectifier to load supplying, and thermistor does not consume such power supply at work
Energy and the whole efficiency for improving Switching Power Supply；
The high power switching power supply anti-surge circuit is in large power supply in use, the surge electricity of Switching Power Supply can be reduced
Stream, while the service efficiency of Switching Power Supply can be improved.
2, filter circuit includes the first filter capacitor, the second filter capacitor, is dropped with the first filter capacitor, the second filter capacitor
Low AC ripple ripple coefficient promotes efficient, smooth electric current output.
3, control circuit includes voltage detecting circuit, trigger switch circuit, when power supply electrifying, the first electrolytic capacitor,
Two electrolytic capacitor charging transients, the first electrolytic capacitor, the second electrolytic capacitor both ends voltage with rising, pass through voltage detecting electricity
The voltage of the first electrolytic capacitor, the second electrolytic capacitor both ends is detected on road, is opened with the triggering in high voltage triggered control circuit
Powered-down road, to control relay closure, i.e. two terminal shortcircuit of thermistor, input current is directly over relay and supplies load
Electricity.
4, voltage detecting circuit includes second resistance, 3rd resistor, the 4th resistance, passes through second resistance, 3rd resistor,
Four the first electrolytic capacitors of resistance detection, the second electrolytic capacitor both ends voltage.
5, trigger switch circuit include the first triode, it is the second triode, the 5th resistance, the 6th resistance, the 7th resistance, steady
Press diode, when the voltage that voltage detecting circuit detects reaches 7.5V, the first triode ON, when the first triode ON
The level of the second transistor base will be dragged down afterwards, to make the second triode ON, wherein defeated help power supply 12V to flow through the two or three
Pole pipe makes relay power on closure, and relay closure makes two terminal shortcircuit of thermistor, and alternating current flows through relay and supplies to load at this time
Electricity, thermistor do not consume energy without work；Wherein the 7th resistance, zener diode, which play, draws high the first transistor emitter
The effect of voltage, the effect of the 5th resistance are to draw high the level of the second transistor base when the first triode does not work, and make
Two triodes are in off state.
Detailed description of the invention
Fig. 1 is the floor map of the utility model embodiment high power switching power supply anti-surge circuit.
Description of symbols:
10, filter circuit, the 11, first filter capacitor, the 12, second filter capacitor, 13, first capacitor, 14, first resistor,
15, the second capacitor, 16, third capacitor, the 17, the 4th capacitor, the 18, the 5th capacitor, the 19, the 6th capacitor, 20, thermistor, 30, pressure
Quick resistance, 40, rectifier bridge, the 50, first electrolytic capacitor, the 60, second electrolytic capacitor, 70, relay, 71, contact switch, 72, touching
Hair line circle, 80, control circuit, 81, voltage detecting circuit, 811, second resistance, 812,3rd resistor, the 813, the 4th resistance, 82,
Trigger switch circuit, the 821, first triode, the 822, second triode, the 823, the 5th resistance, the 824, the 6th resistance, the 825, the 7th
Resistance, 826, zener diode, the 827, the 8th resistance, the 828, the 7th capacitor, 829, first diode, 90, accessory power supply.
Specific embodiment
The embodiments of the present invention are described in detail below.
As shown in Figure 1, high power switching power supply anti-surge circuit, including filter circuit 10, thermistor 20, varistor
30, rectifier bridge 40, the first electrolytic capacitor 50, the second electrolytic capacitor 60, relay 70, control circuit 80, accessory power supply 90, filtering
Two power inputs of circuit 10 are connect with the two poles of the earth of alternating current input power supplying respectively, and the first output end of filter circuit 10 passes through
Thermistor 20 is connect with the first input end of rectifier bridge 40, and the second of the second output terminal of filter circuit 10 and rectifier bridge 40 is defeated
Enter end connection；Varistor 30 and two input terminals of rectifier bridge 40 are connected in parallel；First electrolytic capacitor 50, the second electrolytic capacitor
60 output end respectively with rectifier bridge 40 is connected in parallel；
Relay 70 has contact switch 71, trigger winding 72, and contact switch 71 is connected in parallel with thermistor 20, triggers
Two input terminals of coil 72 are connect with two output ends of control circuit 80, two input terminals of control circuit 80 respectively with it is auxiliary
Help power supply 90, the connection of the first electrolytic capacitor 50.
Wherein, filter circuit 10 includes the first filter capacitor 11, the second filter capacitor 12, first capacitor 13, first resistor
14, the second capacitor 15, third capacitor 16, the 4th capacitor 17, the 5th capacitor 18, the 6th capacitor 19, the first filter capacitor 11 and
Two filter capacitors 12 are connected in series；First capacitor 13, first resistor 14 are connected in parallel with the first filter capacitor 11 respectively, the second electricity
Hold 15 to be connected in parallel with the second filter capacitor 12；Third capacitor 16, the 4th capacitor 17 anode respectively with the second filter capacitor 12
Two input terminals connection, third capacitor 16, the 4th capacitor 17 cathode ground line；5th capacitor 18, the 6th capacitor 19 are just
Pole is connect with two output ends of filter circuit 10 respectively, the cathode ground line of the 5th capacitor 18, the 6th capacitor 19；
Control circuit 80 includes voltage detecting circuit 81, trigger switch circuit 82, the anode and the of voltage detecting circuit 81
The connection of one electrolytic capacitor 50, the cathode ground connection of voltage detecting circuit 81；Trigger switch circuit 82 has triggering input terminal, power supply defeated
Enter end, ground wire connecting pin, triggering input terminal is connect with the output end of voltage detecting circuit 81, power input and accessory power supply 90
Connection, ground wire connecting pin ground line；
Voltage detecting circuit 81 includes second resistance 811,3rd resistor 812, the 4th resistance 813, and second resistance 811 is just
Pole is connect with the first electrolytic capacitor 50, and 3rd resistor 812, the 4th resistance 813 are connected in series with second resistance 811, the 4th resistance
The anode of 813 cathode ground line, the 4th resistance 813 is connect with triggering input terminal；
Trigger switch circuit 82 includes the first triode 821, the second triode 822, the 5th resistance 823, the 6th resistance
824, the 7th resistance 825, zener diode 826, the 8th resistance 827, the 7th capacitor 828, first diode 829, the 5th resistance
823, the anode of the 7th resistance 825, the second triode 822 emitter connect with power input, the 6th resistance 824 and the 5th
Resistance 823 is connected in series, and the cathode of the 6th resistance 824 is connect with the collector of the first triode 821；First triode 821
Base stage connect with triggering input terminal, the emitter of the first triode 821, the cathode of the 7th resistance 825 and zener diode 826
Anode connection, the cathode ground line of zener diode 826；The base stage of second triode 822 and the cathode of the 5th resistance 823 connect
It connects, the collector of the second triode 822 is connect with the anode of trigger winding 72；
The two poles of the earth of 8th resistance 827 are connect with the collector of triggering input terminal, the second triode 822 respectively, the 7th capacitor
828 anode is connect with the collector of the second triode 822, the cathode ground line of the 7th capacitor 828；First diode 829
Anode is connect with the anode of trigger winding 72, the cathode ground line of first diode 829.
The present embodiment has the advantages that
1, this high power switching power supply anti-surge circuit includes filter circuit 10, thermistor 20, varistor 30, rectification
Bridge 40, the first electrolytic capacitor 50, the second electrolytic capacitor 60, relay 70, control circuit 80, accessory power supply 90, work as power initiation
When, alternating current energization moment is electrolysed electricity to the first electrolytic capacitor 50, second by filter circuit 10, thermistor 20 and rectifier bridge 40
Hold 60 chargings；Thermistor 20 is concatenated in electric power loop, if it is infinite that we can be considered as immediate current without thermistor 20
Greatly, very big impact can be thus caused to utility grid；At this moment thermistor 20 just plays prevents high current input action, but
It is to start to work normally after power initiation, thermistor 20 is still gone here and there in circuit, consumes energy, and with the function of power supply
Rate increases, and resistance value and power also increase, and will consume more energy；
First electrolytic capacitor 50,60 charging transient of the second electrolytic capacitor are equivalent to the resistor coupled in parallel of resistance value very little in rectifier bridge
40 output ends, when the first electrolytic capacitor 50,60 both ends of the second electrolytic capacitor voltage with rising, by control circuit 80 make after
Electric appliance 70 is closed, i.e., 20 liang of terminal shortcircuits of thermistor, input current are directly over relay 70 to load supplying；
The resistance value of thermistor 20 can be improved in power initiation electric current in this process, reduces surge current；Work as delay
A period of time relay 70 is closed, and electric current is directly over rectifier to load supplying, such power supply thermistor 20 at work
It does not consume energy and improves the whole efficiency of Switching Power Supply；
The high power switching power supply anti-surge circuit is in large power supply in use, the surge electricity of Switching Power Supply can be reduced
Stream, while the service efficiency of Switching Power Supply can be improved.
2, filter circuit 10 includes the first filter capacitor 11, the second filter capacitor 12, is filtered with the first filter capacitor 11, second
Wave capacitor 12 reduces AC ripple ripple coefficient, promotes efficient, smooth electric current output.
3, control circuit 80 includes voltage detecting circuit 81, trigger switch circuit 82, when power supply electrifying, the first electrolysis electricity
Hold 60 charging transient of the 50, second electrolytic capacitor, the first electrolytic capacitor 50,60 both ends of the second electrolytic capacitor voltage with rising,
The voltage that the first electrolytic capacitor 50,60 both ends of the second electrolytic capacitor are detected by voltage detecting circuit 81 is touched with high voltage
The trigger switch circuit 82 in control circuit 80 is sent out, to control the closure of relay 70, i.e. 20 liang of terminal shortcircuits of thermistor, input
Electric current is directly over relay 70 to load supplying.
4, voltage detecting circuit 81 includes second resistance 811,3rd resistor 812, the 4th resistance 813, passes through second resistance
811,3rd resistor 812, the 4th resistance 813 detect the voltage of the first electrolytic capacitor 50,60 both ends of the second electrolytic capacitor.
5, trigger switch circuit 82 includes the first triode 821, the second triode 822, the 5th resistance 823, the 6th resistance
824, the 7th resistance 825, zener diode 826, when the voltage that voltage detecting circuit 81 detects reaches 7.5V, the one or three pole
Pipe 821 is connected, and the level of 822 base stage of the second triode will be dragged down after the conducting of the first triode 821, to make the two or three pole
Pipe 822 is connected, and helps power supply 12V to flow through the second triode 822 relay 70 is made to power on closure wherein defeated, relay 70, which is closed, makes heat
20 liang of terminal shortcircuits of quick resistance, alternating current flows through relay 70 and powers to the load at this time, and thermistor 20 does not consume energy without work；
Wherein the 7th resistance 825, zener diode 826 play the role of drawing high 821 emitter voltage of the first triode, the 5th resistance
823 effect is to draw high the level of 822 base stage of the second triode when the first triode 821 does not work, make the second triode
822 are in off state.
The above are only specific embodiments of the present invention, does not limit the protection scope of the utility model with this；Not
It violates made any replacement on the basis of the utility model is conceived and improves, the category protection scope of the utility model.
Claims (9)
1. high power switching power supply anti-surge circuit, which is characterized in that including filter circuit, thermistor, varistor, rectification
Bridge, the first electrolytic capacitor, the second electrolytic capacitor, relay, control circuit, accessory power supply, two power supplys of the filter circuit
Input terminal is connect with the two poles of the earth of alternating current input power supplying respectively, the first output end of filter circuit by the thermistor with it is described
The first input end of rectifier bridge connects, and the second output terminal of filter circuit is connect with the second input terminal of the rectifier bridge；It is described
Two input terminals of varistor and the rectifier bridge are connected in parallel；First electrolytic capacitor, the second electrolytic capacitor respectively with
The output end of the rectifier bridge is connected in parallel；
The relay has contact switch, trigger winding, and the contact switch is connected in parallel with the thermistor, the touching
Two input terminals of hair line circle are connect with two output ends of the control circuit, two input terminals difference of the control circuit
It is connect with accessory power supply, the first electrolytic capacitor.
2. high power switching power supply anti-surge circuit as described in claim 1, which is characterized in that the filter circuit includes the
One filter capacitor, the second filter capacitor, first filter capacitor and second filter capacitor are connected in series.
3. high power switching power supply anti-surge circuit as claimed in claim 2, which is characterized in that the filter circuit further includes
First capacitor, first resistor, the second capacitor, the first capacitor, first resistor are in parallel with first filter capacitor respectively to be connected
It connects, second capacitor is connected in parallel with second filter capacitor.
4. high power switching power supply anti-surge circuit as claimed in claim 2, which is characterized in that the filter circuit further includes
Third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the third capacitor, the 4th capacitor anode respectively with described second
Two input terminals of filter capacitor connect, the cathode ground line of the third capacitor, the 4th capacitor；5th capacitor, the 6th
The anode of capacitor is connect with two output ends of the filter circuit respectively, the cathode ground connection of the 5th capacitor, the 6th capacitor
Line.
5. such as the described in any item high power switching power supply anti-surge circuits of Claims 1-4, which is characterized in that the control
Circuit includes voltage detecting circuit, trigger switch circuit, and anode and first electrolytic capacitor of the voltage detecting circuit connect
It connects, the cathode ground connection of the voltage detecting circuit；The trigger switch circuit has triggering input terminal, power input, ground wire
Connecting pin, the triggering input terminal are connect with the output end of the voltage detecting circuit, the power input and the auxiliary
Power supply connection, the ground wire connecting pin ground line.
6. high power switching power supply anti-surge circuit as claimed in claim 5, which is characterized in that the voltage detecting circuit packet
Including second resistance, 3rd resistor, the 4th resistance, the anode of the second resistance is connect with first electrolytic capacitor, and described the
Three resistance, the 4th resistance and the second resistance are connected in series, the cathode ground line of the 4th resistance, the 4th resistance
It is positive to be connect with the triggering input terminal.
7. high power switching power supply anti-surge circuit as claimed in claim 5, which is characterized in that the trigger switch circuit packet
Include the first triode, the second triode, the 5th resistance, the 6th resistance, the 7th resistance, zener diode, the 5th resistance,
The anode of seven resistance, the second triode emitter connect with the power input, the 6th resistance and it is described 5th electricity
Resistance is connected in series, and the cathode of the 6th resistance is connect with the collector of first triode；
The base stage of first triode is connect with the triggering input terminal, emitter, the 7th resistance of first triode
The anode of cathode and the zener diode connect, the cathode of the zener diode is grounded；Second triode
Base stage is connect with the cathode of the 5th resistance, and the collector of second triode is connect with the anode of the trigger winding.
8. high power switching power supply anti-surge circuit as claimed in claim 7, which is characterized in that the trigger switch circuit is also
Including the 8th resistance, the 7th capacitor, the two poles of the earth of the 8th resistance respectively with it is described triggering input terminal, the second triode current collection
The anode of pole connection, the 7th capacitor is connect with the collector of second triode, the cathode ground connection of the 7th capacitor
Line.
9. high power switching power supply anti-surge circuit as claimed in claim 5, which is characterized in that the trigger switch circuit is also
Including first diode, the anode of the first diode is connect with the anode of the trigger winding, the first diode
Cathode ground line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820975631.9U CN208299684U (en) | 2018-06-22 | 2018-06-22 | High power switching power supply anti-surge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820975631.9U CN208299684U (en) | 2018-06-22 | 2018-06-22 | High power switching power supply anti-surge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208299684U true CN208299684U (en) | 2018-12-28 |
Family
ID=64701725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820975631.9U Expired - Fee Related CN208299684U (en) | 2018-06-22 | 2018-06-22 | High power switching power supply anti-surge circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208299684U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212746A (en) * | 2019-05-10 | 2019-09-06 | 江苏理工学院 | A kind of constant pressure Switching Power Supply surge-prevention soft starting circuit and method |
| CN111564961A (en) * | 2020-05-22 | 2020-08-21 | 深圳创维－Rgb电子有限公司 | Inrush current protection switching circuit, switching power supply and television |
-
2018
- 2018-06-22 CN CN201820975631.9U patent/CN208299684U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212746A (en) * | 2019-05-10 | 2019-09-06 | 江苏理工学院 | A kind of constant pressure Switching Power Supply surge-prevention soft starting circuit and method |
| CN111564961A (en) * | 2020-05-22 | 2020-08-21 | 深圳创维－Rgb电子有限公司 | Inrush current protection switching circuit, switching power supply and television |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181228 Termination date: 20210622 |
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| CF01 | Termination of patent right due to non-payment of annual fee |