CN107370354B - A kind of AC input current Surge suppression system - Google Patents
A kind of AC input current Surge suppression system Download PDFInfo
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- CN107370354B CN107370354B CN201710494981.3A CN201710494981A CN107370354B CN 107370354 B CN107370354 B CN 107370354B CN 201710494981 A CN201710494981 A CN 201710494981A CN 107370354 B CN107370354 B CN 107370354B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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Abstract
The present invention relates to a kind of AC input current Surge suppression systems, comprising: suppression circuit and control circuit；Suppression circuit, for the size of limit inrush currents, plays the protection to circuit devcie including accessing in circuit after a resistance and thyristor parallel connection；Control circuit is connect with suppression circuit, reduces the power loss of suppression circuit in circuit by the opening and closing of thyristor in control suppression circuit.Current surge inhibits the presence of resistance, and impact of the surge current to circuit devcie is effectively reduced；In resistance both ends parallel thyristors, the power loss as caused by resistance in circuit normal processes is effectively solved.
Description
Technical field
The present invention relates to technical field of circuit control more particularly to a kind of AC input current Surge suppression systems.
Background technique
Surge current is that AC power source connects moment, the one kind for being charged rapidly due to input energy storage filter capacitor, and being generated
Much larger than the peak point current of equipment steady state operating current, have centainly to equipment inside rectifier bridge, fuse and electromagnetic interface filter
Percussion, the final reliability for influencing equipment and service life.
Currently, the method for commonly inhibiting inrush current is to seal in current-limiting resistance in rectification circuit, such as Fig. 1 institute
Show, its working principle is that: the current limliting in rectification outlet side one lesser resistance of series connection, for circuital current.It is inputted in exchange
It is closed moment, for capacitor C1 close to short-circuit condition, the dash current generated in circuit is very big, exists if any resistance R1, because of its partial pressure
Effect, can in limiting circuit electric current size, finally play the effect of each device in protection circuit.
Traditional surge current suppression circuit can satisfy certain use occasion.But its disadvantage are as follows: resistance R1 resistance value
The more difficult assurance of selection, if resistance R1 resistance value is too small, the instantaneous power generated on the resistance can be very big, and to surge electricity
The inhibiting effect of stream is unobvious, cannot play the role of good circuit protection.Resistance value increase, which can be played, preferably inhibits surge
The effect of electric current, but resistance value can not be selected excessive, and otherwise the power loss of circuit can be larger, and capacitor C1 charging can be very slow.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of AC input current Surge suppression system, passes to solve
When resistance is larger in system scheme, consumption many technical problems such as power is larger at resistance both ends.
The purpose of the present invention is mainly achieved through the following technical solutions:
Based in one embodiment of the present of invention, a kind of AC input current Surge suppression system is provided, comprising: suppression
Circuit processed and control circuit；Suppression circuit after a resistance and thyristor parallel connection including accessing in circuit, for limiting surge electricity
The size of stream plays the protection to circuit devcie；Control circuit is connect with suppression circuit, passes through thyristor in control suppression circuit
Opening and closing reduce suppression circuit power loss in circuit.
In another embodiment based on present system, suppression circuit includes resistance R1, resistance R2, resistance R3, electricity
Hold C1, rectifier bridge V1, thyristor V2；After exchange is electrically accessed suppression circuit, direct current, resistance are rectified by rectifier bridge V1 first
One end of R1, one end of resistance R2, thyristor V2 cathode be connected with the negative output terminal of rectifier bridge V1；The other end of resistance R1,
The anode of thyristor V2 is connect with the cathode of capacitor C1；The positive output end of rectifier bridge V1 is connect with the anode of capacitor C1；Resistance R2
The other end connect with the gate pole of one end of resistance R3, thyristor V2；The other end of resistance R3, the positive output end of rectifier bridge V1 and
Negative output terminal connects to the control circuit respectively, input control signal.
In another embodiment based on present system, control circuit includes resistance R4, R5, R6, R7, comparator N1
With triode V3；R6 connect with R7 after connect rectifier bridge V1 positive output end and negative output terminal between, the junction of R6 and R7 with
The negative input end of N1 connects, the positive input terminal input reference voltage Vref of N1；The positive power source terminal of N1 is connect with+15V power supply, N1's
One end of the connection of the negative output terminal of ground terminal and V1, the output end of N1 and R4 connect, the other end of R4 respectively with one end of R5, V3
Base stage connection, the other end of R5 connect with the emitter of V3 ,+15V power supply respectively, the collector of V3 and the other end company of R3
It connects, output control signal.
In another embodiment based on present system, brilliant lock is passed through by the proportionate relationship control of R2 and R3 resistance value
The driving current of pipe V2.
In another embodiment based on present system, input rectifying bridge is 380V alternating current, integration output 540V
When direct current, R6 takes 7.5K Ω, R7 to take 820K Ω.
In another embodiment based on present system, when just having started work, the reverse input end electricity of comparator N1
It forces down in 3 foot voltages, the output end output of N1 is high level, and triode V3 is not turned on, then thyristor V2 is without gate electrode drive signals,
In blocking state, circuit is capacitor C1 charging by resistance R1；With the rising of busbar voltage, the reversed input of comparator N1
The voltage at end is finally higher than 3 foot voltages, the output of 1 foot be it is low, triode V3 conducting generates the gate electrode drive signals of thyristor V2,
Under the action of the signal, thyristor V2 conducting, resistance R1 is short-circuited in circuit, and electric current is that capacitor C1 fills by thyristor V2
Electricity.
In another embodiment based on present system, the concrete model of thyristor is 30TPS08.
The present invention has the beneficial effect that:
Current surge inhibits the presence of resistance, and impact of the surge current to circuit devcie is effectively reduced；Resistance both ends simultaneously
Join thyristor, effectively solves the power loss as caused by resistance in circuit normal processes.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is conventional surge current suppressing circuit；
Fig. 2 is the Inrush current restraining system in one embodiment of the invention.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
The embodiment of the present application provides a kind of AC input current Surge suppression system, exchanges DC voltage after input rectifying
To rear class filtering capacitor charging, since capacitor both end voltage can not be mutated, impact DC voltage can generate surge current.In order to
Inhibit surge current, increase resistance R1, DC voltage is charged by R1 to capacitor C1, and surge current can be effectively suppressed.Pass through inspection
It surveys voltage value needed for C1 charging voltage reaches and passes through the driving resistance R2 of thyristor V2 compared with presetting reference voltage value
Open-minded with R3 control thyristor V2, short-circuit R1, major loop generates loss after avoiding circuit from working normally.
A kind of AC input current Surge suppression system, as shown in Figure 2, comprising: suppression circuit and control circuit；Inhibit electricity
Road is used for the size of limit inrush currents, plays the protection to circuit devcie；Control circuit is connect with suppression circuit, for reducing
The power loss of suppression circuit in circuit.
Wherein suppression circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, rectifier bridge V1, thyristor V2, such as attached drawing 2
It is shown；After exchange is electrically accessed suppression circuit, direct current is rectified by rectifier bridge V1 first, one end of resistance R1, resistance R2
One end, thyristor V2 cathode be connected with the negative output terminal of rectifier bridge V1；The other end of resistance R1, the anode of thyristor V2 and electricity
Hold the cathode wire connection of C1；The positive output end of rectifier bridge V1 is connect with the anode of capacitor C1；The other end and resistance of resistance R2
The gate pole connection of one end, thyristor V2 of R3；The other end of resistance R3, the positive output end of rectifier bridge V1 and negative output terminal respectively with
Control circuit connection, input control signal.It is controlled by the proportionate relationship of R2 and R3 and is used for by the driving current of thyristor V2
Protect circuit components.
Control circuit includes resistance R4, R5, R6, R7, comparator N1 and triode V3；R6 connects rectifier bridge after connecting with R7
Between the positive output end and negative output terminal of V1, the negative input end of the junction and N1 of R6 and R7 is connected, the positive input terminal input of N1
Reference voltage Vref, in one particular embodiment of the present invention, Vref is redefined for 5.1V；The positive power source terminal and+15V of N1
Power supply connection, the ground terminal of N1 and the negative output terminal of V1 connect, and the output end of N1 and one end of R4 connect, the other end difference of R4
Connect with the base stage of one end of R5, V3, the other end of R5 is connect with the emitter of V3 ,+15V power supply respectively, the collector of V3 with
The other end of R3 connects, output control signal.
In one particular embodiment of the present invention, R1 is 280 Ω, and R2 is 75 Ω, and R3 is 130 Ω, and C1 is 660 μ F, V1
For FUO 22-16N, V2 30TPS08, R4 are 2K Ω, R5 is 3K Ω, R6 is that 7.5K Ω (is suitable for 380V AC rectification
The requirement of 540V direct current), R7 be 820K Ω, N1 LM193, V3 S8550.
After exchange electrically connects, it is rectified into direct current by rectifier bridge V1, the V+ voltage after rectifier bridge V1 rectification passes through resistance
The negative terminal of comparator N1 is sent to after R6 and R7 partial pressure, compared with the Vref reference voltage of the positive input of comparator N1, just
When starting work, the reverse input end voltage of comparator N1 is lower than 3 foot voltages, and the output end output of N1 is high level, triode
V3 is not turned on, then for thyristor V2 without gate electrode drive signals, thyristor V2 is in blocking state, and circuit is capacitor C1 by resistance R1
Charging.Resistance R1 plays the role of inhibiting exchange inrush current in this process, but certain function can be generated on its resistance
Rate loss.With the rising of busbar voltage, the voltage of the reverse input end of comparator N1 is finally higher than 3 foot voltages, and the output of 1 foot is
Low, triode V3 conducting generates the gate electrode drive signals of thyristor V2, under the action of the signal, thyristor V2 conducting, and resistance
R1 is short-circuited in circuit, excision.Electric current is capacitor C1 charging by thyristor V2.Because turn on thyristors resistance is extremely low, at it
The power loss of upper generation is also extremely low, and plays inhibition surge current due to the presence of resistance R1 at circuit start initial stage
Effect.
In conclusion the working principle of AC input current surge restraint circuit are as follows: electrically connect initial stage in exchange, pass through electricity
The size of current-limiting resistance limit inrush currents in road, plays the protection to circuit devcie.To reduce the resistance in circuit
Power loss after circuit start, realizes leading for thyristor by giving gate signal by way of resistor coupled in parallel thyristor
It is logical, thus short-circuit resistance, the normal work of start circuit.The circuit is the shock problem for solving surge current, is also solved
Because resistance there are due to caused by power dissipation concerns.Circuit form of the present invention is novel, and structure is simple, at low cost, can satisfy
The demand of most of input circuit can apply in all kinds of electrical equipments.
The present invention has the beneficial effect that: current surge inhibits the presence of resistance, and surge current is effectively reduced to circuit devcie
Impact；In resistance both ends parallel thyristors, the power loss as caused by resistance in circuit normal processes is effectively solved.
It will be understood by those skilled in the art that realizing all or part of the process of above-described embodiment method, meter can be passed through
Calculation machine program is completed to instruct relevant hardware, and the program can be stored in computer readable storage medium.Wherein, institute
Stating computer readable storage medium is disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of AC input current Surge suppression system characterized by comprising suppression circuit and control circuit；Inhibit electricity
It, for the size of limit inrush currents, is played to circuit devcie including being accessed in circuit after a resistance and thyristor parallel connection on road
Protection；Control circuit is connect with suppression circuit, reduces suppression circuit in electricity by the opening and closing of thyristor in control suppression circuit
Power loss in road；
Suppression circuit includes resistance R1, resistance R2, resistance R3, capacitor C1, rectifier bridge V1, thyristor V2；Exchange is electrically accessed inhibition
After circuit, direct current is rectified by rectifier bridge V1 first, one end of resistance R1, one end of resistance R2, thyristor V2 cathode
It is connected with the negative output terminal of rectifier bridge V1；The other end of resistance R1, the anode of thyristor V2 are connect with the cathode of capacitor C1；Rectification
The positive output end of bridge V1 is connect with the anode of capacitor C1；The other end of resistance R2 and one end of resistance R3, the gate pole of thyristor V2
Connection；The other end of resistance R3, the positive output end of rectifier bridge V1 and negative output terminal connect to the control circuit respectively, input control letter
Number；
Control circuit includes resistance R4, R5, R6, R7, comparator N1 and triode V3；R6 connects rectifier bridge V1's after connecting with R7
Between positive output end and negative output terminal, the negative input end of the junction and N1 of R6 and R7 is connected, the positive input terminal input reference of N1
Voltage Vref；The positive power source terminal of N1 is connect with+15V power supply, and the negative output terminal of the ground terminal of N1 and V1 connect, the output end of N1 with
One end of R4 connects, and the other end of R4 is connect with the base stage of one end of R5, V3 respectively, the other end of R5 respectively with the transmitting of V3
Pole, the connection of+15V power supply, the collector of V3 and the other end of R3 connect, output control signal；
When just starting work, the reverse input end voltage of comparator N1 is lower than 3 foot voltages, and the output end output of N1 is high level,
Triode V3 is not turned on, then thyristor V2 is in blocking state without gate electrode drive signals, and circuit is that capacitor C1 fills by resistance R1
Electricity；With the rising of busbar voltage, the voltage of the reverse input end of comparator N1 is finally higher than 3 foot voltages, the output of 1 foot be it is low,
Triode V3 conducting, generates the gate electrode drive signals of thyristor V2, under the action of the signal, thyristor V2 conducting, and resistance R1
It is short-circuited in circuit, electric current is capacitor C1 charging by thyristor V2；
R2 is 75 Ω, and R3 is 130 Ω, and input rectifying bridge is 380V alternating current, and when integration exports 540V direct current, R6 takes 7.5K
Ω, R7 take 820K Ω.
2. the system as claimed in claim 1, which is characterized in that pass through thyristor by the proportionate relationship control of R2 and R3 resistance value
The driving current of V2.
3. such as the described in any item systems of claim 1-2, which is characterized in that the concrete model of the thyristor is 30TPS08.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494981.3A CN107370354B (en) | 2017-06-26 | 2017-06-26 | A kind of AC input current Surge suppression system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494981.3A CN107370354B (en) | 2017-06-26 | 2017-06-26 | A kind of AC input current Surge suppression system |
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| Publication Number | Publication Date |
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| CN107370354A CN107370354A (en) | 2017-11-21 |
| CN107370354B true CN107370354B (en) | 2019-07-02 |
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| CN201710494981.3A Active CN107370354B (en) | 2017-06-26 | 2017-06-26 | A kind of AC input current Surge suppression system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108199568A (en) * | 2018-01-05 | 2018-06-22 | 西安电子工程研究所 | A kind of inhibition in-rush current limiting circuit |
| US10483869B1 (en) * | 2018-07-13 | 2019-11-19 | Stmicroelectronics Ltd | Power conversion circuit having inrush current limiting resistor bypass |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101694938A (en) * | 2009-10-27 | 2010-04-14 | 浪潮电子信息产业股份有限公司 | Surging current suppression method |
| CN202260437U (en) * | 2011-10-13 | 2012-05-30 | 深圳Tcl新技术有限公司 | Low-power surge eliminating circuit and switching power supply |
| CN202840933U (en) * | 2012-11-07 | 2013-03-27 | 洛阳隆盛科技有限责任公司 | AC slow-startup circuit |
| CN205377275U (en) * | 2016-01-12 | 2016-07-06 | 陕西华讯科技有限公司 | Surge current inhibitor |
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