CN207082837U - A kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply - Google Patents
A kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply Download PDFInfo
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- CN207082837U CN207082837U CN201720605792.4U CN201720605792U CN207082837U CN 207082837 U CN207082837 U CN 207082837U CN 201720605792 U CN201720605792 U CN 201720605792U CN 207082837 U CN207082837 U CN 207082837U
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Abstract
A kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply.It is pre-charged for dc bus by resistance R in power supply electrifying, after any road power supply is started, is controlled by delay circuit, first from resistance R to high-voltage capacitor charging, resistance R plays a part of suppressing surge current.After the completion for the treatment of high-voltage capacitor charging, then by delay circuit control triode ON adhesive power relay, so that power input major loop is connected.Circuit provided by the utility model, caused surge current during each road power supply progress switching manipulation can be effectively avoided to be influenceed to caused by power supply itself circuit and power network.And the control of the utility model circuit is simple, power device is few, and cost is low, and each road power supply independent control will not influence each other, and can effectively suppress the impact of power surge Current on Grid.
Description
Technical field
A kind of electronic equipment protection technique is the utility model is related to, more particularly to one kind is applied to multiple-channel output direct current power supply
Start-up surge protection circuit.
Background technology
Surge, i.e., beyond the overvoltage of the moment of normal working voltage or electric current or excessively stream.Also referred to as momentary pulse voltage, wink
State overvoltage, surging or surge, surge.This of short duration and violent pulse current, voltage pulsation can often be set to electronics in circuit
It is standby to cause irreversible infringement, influence the normal work and service life of equipment.
For example, currently used surge protector (SPD) is often merely able to play for KV level high pressure caused by thunder and lightning
Protective effect, and the surge current caused by being operated for power supply its own switch then can not be protected effectively.And power switching operations
Caused by dash current often influence power source internal device, especially influence making for power input rectifier bridge and high-voltage filtering capacitor
With the life-span, or even cause the infringement of device.
Particularly, when multichannel relatively high power dc source exports, per road power supply electrifying moment surge to caused by power network
Interference and impact more can not be ignored.
The content of the invention
The purpose of this utility model is to provide a kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply, energy
Enough power-supply device power-on surge currents that effectively solves are damaged to caused by power supply itself circuit and power network, and realize that each group power supply is defeated
Independent control between going out.
The power supply start-up surge protection circuit include charging resistor R, high-voltage capacitance C, power board, power relay K,
Triode Q1：
The pre-charge resistance R is with being connected the shared straight of the power supply after the contact switch parallel connection of the power relay K
Flow bus；
The first and second control terminals of the power relay K colelctor electrode with the triode Q1 and the power supply respectively
The control interface connection of control panel；
The emitter stage connection independent power supply of the triode Q1, the base stage of the triode Q1 connect the power supply control
The constant pressure output interface of making sheet；
The positive pole of the high-voltage capacitance C connects the power source bus, the negative pole ground connection of the high-voltage capacitance C.
In power supply start-up surge protection circuit as described above, the triode Q1 is also externally provided with biasing resistor, the biasing
The resistance of resistance determines according to the bias current under the triode Q1 on off states.
Further, in foregoing circuit, the power board quantity is including two or more, wherein each power supply
Plate is provided with separate control interface and constant pressure output interface；It is connected in parallel between each power board, Ke Yifen
The power relay K is not controlled individually.
In foregoing circuit, the power board also includes following delay circuit：
Including charging resistor R88, delay capacitor C77, delays time to control triode Q13, voltage-regulator diode D38, biasing resistor
R106, collector resistance R89 and diode D31；
Wherein, collector resistance R89 is in parallel with the diode D31, and the positive pole of the diode D31 connects the delay
Control triode Q13 colelctor electrode, the grounded emitter of the delays time to control triode Q13, the voltage-regulator diode D38 and institute
Biasing resistor R106 parallel connections are stated, the voltage-regulator diode D38 positive poles connect the base stage of the delays time to control triode Q13, described
Voltage-regulator diode D38 negative poles connect the positive pole of the delay capacitor C77, the negative pole ground connection of the delay capacitor C77, the delay
Electric capacity C77 positive pole also passes through the negative pole of the charging resistor R88 connections voltage-regulator diode D38；
In the delay circuit, the control interface of the positive pole of the delay diode D31 as the power board, institute
The negative pole for stating diode D31 connects the constant pressure output interface of the power board.
Further, in foregoing circuit, the second control of the control interface of the power board and the power relay K
Photo-coupler is additionally provided between end processed, between the constant pressure output interface of the power board and the triode Q1 base stage；
The first input end of the photo-coupler connects the constant pressure output interface of the power board, the photo-coupler
The second input connect the control interface of the power board, the first output end of the photo-coupler connects three pole
Pipe Q1 base stage, the second output end of the photo-coupler connect the second control terminal of the power relay K.
Further, in above-mentioned power supply start-up surge protection circuit, the constant pressure output interface per power board all the way
Also it is serially connected with voltage-regulator diode Z1, Z2, Z3 between the first input end of the photo-coupler, the voltage-regulator diode Z1, Z2,
Z3 positive pole connects the first input end that the road power board connects photo-coupler respectively, and the negative pole of the voltage-regulator diode connects
Connect the constant pressure output interface of the power board.
Current limiting can be also concatenated respectively per between the first input end of the corresponding photo-coupler of voltage-regulator diode all the way
Resistance R1, R2, R3.
Further, between first, second control terminal of the power relay can also series diode D, two pole
Pipe D positive pole connects the second control terminal of the negative pole power relay, and the negative pole of the diode D connects the negative pole power
First control terminal of relay.
Beneficial effect:
1. start-up surge protection circuit provided by the utility model, according to power supply starting signal, first from resistance R to high pressure
Electric capacity charges, and resistance R plays a part of suppressing surge current.After the completion for the treatment of high-voltage capacitor charging, then by delay circuit control three
Pole pipe turns on adhesive power relay, so that power input major loop is connected.Each road power supply can be effectively avoided to carry out switch behaviour
Caused surge current is to the influence caused by power supply itself circuit and power network when making.
2. the number of power sources that a circuit can be according to the actual requirements, by power board interlock circuit it is simple simultaneously
Connection, you can individually to realizing that effective Anti-surging protects per power supply all the way.The utility model circuit structure is simple, cost
It is low, it is easy to accomplish.Under conditions of effectively suppressing power surge and being impacted to power network, realize multiple power supplies to same group of inlet highway
Share, control circuit is simple and convenient.
3. in circuit provided by the utility model, each road power supply need not individually establish input circuit, therefore this circuit
The use of power device can be effectively limited, it is cost-effective.And it can ensure that every road power supply independent control is independent of each other.Using
Space can be effectively saved in power supply product, reduces small product size, mitigate product weight.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or by implement the present invention and understand.
Brief description of the drawings
Accompanying drawing is used for providing and further understanding to of the present utility model, and a part for constitution instruction, and with this reality
With new embodiment together, for explaining the utility model, do not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is according to start-up surge protection circuit Organization Chart of the present utility model；
Fig. 2 is the structure chart of delay circuit in power board；
Fig. 3 is the power relay K control circuit connection diagrams by taking three-way power control panel as an example.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Start-up surge protection circuit Organization Chart exemplified by the separate power control switch in the tunnels of Fig. 1 Wei Yi tri-.Including charging
The separate power board in resistance R, high-voltage capacitance C, three tunnels, power relay K and triode Q1：
The pre-charge resistance R is with being connected the shared straight of the power supply after the contact switch parallel connection of the power relay K
Flow bus；
The first and second control terminals of the power relay K colelctor electrode with the triode Q1 and each electricity respectively
Control interface (J1, the J2 and J3) connection of source control panel；
The emitter stage connection independent power supply of the triode Q1, the base stage of the triode Q1 connect the power supply control
The constant pressure output interface (+15V1 ,+15V2 ,+15V3) of making sheet；
The positive pole of the high-voltage capacitance C connects the power source bus, the negative pole ground connection of the high-voltage capacitance C.Each electricity
It is connected in parallel between the control panel of source, can individually controls the power relay K.
Above-mentioned triode Q1 is externally provided with biasing resistor, and the resistance of the biasing resistor switchs shape according to the triode Q1
Bias current under state determines.
Further, in foregoing circuit, the second control of the control interface of the power board and the power relay K
Photo-coupler is additionally provided between end processed, between the constant pressure output interface of the power board and the triode Q1 base stage；
The first input end of the photo-coupler connects the constant pressure output interface of the power board, the photo-coupler
The second input connect the control interface of the power board, the first output end of the photo-coupler connects three pole
Pipe Q1 base stage, the second output end of the photo-coupler connect the second control terminal of the power relay K.
Based on above technical scheme, the specific work process of this circuit is as follows：
Single channel or multiple power supplies control panel send command signal to delay circuit, after this delay circuit receives instruction, connect
Switch k.By taking three-way power as an example：J1, J2, J3 are the control interface output signal of three-way power control panel respectively, and this signal divides
The input of the road optocouplers of Bie He tri- is connected, the output end phase of three road optocouplers and the base stage for being even followed by driving triode Q1, three poles
Pipe Q1 emitter stage connects power supply independent all the way, and triode Q1 colelctor electrode connects power relay.After power supply electrifying, pass through first
Resistance R is pre-charged to dc bus.When starting any road power supply, the power board of the road power supply obtains electric work, prolongs thereon
When circuit work, after carrying out suitable time-delay to enabling signal, control power supply plate interface J1, J2 or J3 export one from height to
Thus low level, optocoupler input turn on, optocoupler output saturation, and driving triode switchs to conducting state by cut-off state,
The control terminal of power relay is connected, and obtains power relay coil electric, contact switch adhesive, and the contact of relay will be pre-charged
Resistance R short circuits, power input major loop are connected.
Further, in above-mentioned power supply start-up surge protection circuit, the constant pressure output interface per power board all the way
Also it is serially connected with voltage-regulator diode Z1, Z2, Z3 between the first input end of the photo-coupler, the voltage-regulator diode Z1, Z2,
Z3 positive pole connects the first input end that the road power board connects photo-coupler respectively, and the negative pole of the voltage-regulator diode connects
Connect the constant pressure output interface of the power board.
Current limiting can be also concatenated respectively per between the first input end of the corresponding photo-coupler of voltage-regulator diode all the way
Resistance (R1, R2, R3).
Further, between first, second control terminal of the power relay can also series diode D, two pole
Pipe D positive pole connects the second control terminal of the negative pole power relay, and the negative pole of the diode D connects the negative pole power
First control terminal of relay.
Shown in reference picture 3, the delay circuit in the power board of the present embodiment Zhong Ge roads specifically by charging resistor R88, prolong
When electric capacity C77, delays time to control triode Q13, voltage-regulator diode D38, biasing resistor R106, collector resistance R89 and diode
D31 is formed.No. three delay circuit structures are identical, enter line delay according to the signal of respective power board respectively.
Wherein, collector resistance R89 is in parallel with the diode D31, and the positive pole of the diode D31 connects the delay
Triode Q13 colelctor electrode is controlled, the emitter stage of the delays time to control triode Q13 connects power relay, the pole of voltage stabilizing two
Pipe D38 is in parallel with the biasing resistor R106, and the voltage-regulator diode D38 positive poles connect the delays time to control triode Q13's
Base stage, the voltage-regulator diode D38 negative poles connect the positive pole of the delay capacitor C77, and the negative pole of the delay capacitor C77 connects
Ground, the positive pole of the delay capacitor C77 also pass through the negative pole of the charging resistor R88 connections voltage-regulator diode D38.
In the delay circuit, the control interface of the positive pole of the diode D31 as the power board, described two
Pole pipe D31 negative pole connects the constant pressure output interface of the power board.
The delay circuit course of work is as follows：After power supply electrifying, the constant pressure output interface of each road power board (+15V1 ,+
15V2 or+15V3) respectively charged by the charging resistor R88 in the road delay circuit to delay capacitor C77.C77 just starts
Both ends are low-voltage during charging, and Q13 cut-offs, the control interface J (J1, J2 or J3) of power board is high potential.When delay electricity
After appearance C77 is fully charged, voltage-regulator diode D38 reverse breakdowns, Q13 is turned on, and J switchs to low potential by high potential.I.e. power supply is just upper electric
When, J point current potentials switch to low potential by high potential a process being delayed.Specifically by charging resistor R88 between the delay of the process
Resistance and delay capacitor C77 capacity determine.
One of ordinary skill in the art will appreciate that：Preferred embodiment of the present utility model is the foregoing is only, and
Limitation the utility model is not used in, although the utility model is described in detail with reference to the foregoing embodiments, for ability
For the technical staff in domain, its technical scheme that can be still recorded to foregoing embodiments is modified, or to its middle part
Technical characteristic is divided to carry out equivalent substitution.All any modifications within the spirit and principles of the utility model, made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (8)
1. a kind of power supply start-up surge protection circuit, including, pre-charge resistance (R), high-voltage capacitance (C), power board, its feature
It is, in addition to power relay (K), triode (Q1)；Open the contact of pre-charge resistance (R) and the power relay (K)
The general DC busbar of the power supply is connected after pass is in parallel；
First and second control terminals of the power relay (K) colelctor electrode with the triode (Q1) and the power supply respectively
The control interface connection of control panel；
The emitter stage connection independent power supply of the triode (Q1), the base stage of the triode (Q1) connect the power supply control
The constant pressure output interface of making sheet；
The positive pole of the high-voltage capacitance (C) connects the power source bus, the negative pole ground connection of the high-voltage capacitance (C).
2. power supply start-up surge protection circuit as claimed in claim 1, it is characterised in that the triode (Q1) is also externally provided with partially
Resistance is put, the resistance of the biasing resistor determines according to the bias current under the triode (Q1) on off state.
3. power supply start-up surge protection circuit as claimed in claim 1, it is characterised in that the power board quantity is two
More than, wherein each power board is provided with separate control interface and constant pressure output interface；Each power supply
It is connected in parallel between plate.
4. power supply start-up surge protection circuit as claimed in claim 1, it is characterised in that the power board also includes delay
Circuit；
The delay circuit includes charging resistor (R88), delay capacitor (C77), delays time to control triode (Q13), the pole of voltage stabilizing two
Manage (D38), biasing resistor (R106), collector resistance (R89) and diode (D31)；
The collector resistance (R89) is in parallel with the diode (D31), prolongs described in the positive pole connection of the diode (D31)
When control triode (Q13) colelctor electrode, the grounded emitter of the delays time to control triode (Q13), the voltage-regulator diode
(D38) in parallel with the biasing resistor (R106), voltage-regulator diode (D38) positive pole connects the delays time to control triode
(Q13) base stage, voltage-regulator diode (D38) negative pole connect the positive pole of the delay capacitor (C77), the delay capacitor
(C77) negative pole ground connection, the positive pole of the delay capacitor (C77) also pass through the charging resistor (R88)
Connect the voltage-regulator diode (D38) negative pole；
In the delay circuit, the control interface of the positive pole of the diode (D31) as the power board, two pole
The negative pole for managing (D31) connects the constant pressure output interface of the power board.
5. power supply start-up surge protection circuit as claimed in claim 2, it is characterised in that the control interface of the power board
Between the second control terminal of the power relay (K), the constant pressure output interface of the power board and the triode
(Q1) photo-coupler is additionally provided between base stage；
The first input end of the photo-coupler connects the constant pressure output interface of the power board, and the of the photo-coupler
Two inputs connect the control interface of the power board, and the first output end of the photo-coupler connects the triode
(Q1) base stage, the second output end of the photo-coupler connect the second control terminal of the power relay (K).
6. power supply start-up surge protection circuit as claimed in claim 5, it is characterised in that the constant pressure output of the power board
Voltage-regulator diode (Z1, Z2, Z3), the voltage-regulator diode are also serially connected between the first input end of interface and the photo-coupler
Positive pole connect the first input end of the photo-coupler, the negative pole of the voltage-regulator diode connects the perseverance of the power board
Press output interface.
7. power supply start-up surge protection circuit as claimed in claim 6, it is characterised in that the voltage-regulator diode and the optocoupler
Current-limiting resistance (R1, R2, R3) is also serially connected between the first input end of clutch.
8. power supply start-up surge protection circuit as claimed in claim 4, it is characterised in that first, the of the power relay
Diode (D) is also associated between two control terminals, the positive pole of the diode (D) connects the second of the negative pole power relay
Control terminal, the negative pole of the diode (D) connect the first control terminal of the negative pole power relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720605792.4U CN207082837U (en) | 2017-05-26 | 2017-05-26 | A kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720605792.4U CN207082837U (en) | 2017-05-26 | 2017-05-26 | A kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207082837U true CN207082837U (en) | 2018-03-09 |
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ID=61436908
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720605792.4U Expired - Fee Related CN207082837U (en) | 2017-05-26 | 2017-05-26 | A kind of start-up surge protection circuit of common bus multiple-channel output direct current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207082837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378810A (en) * | 2018-11-12 | 2019-02-22 | 西安昆仑工业（集团）有限责任公司 | A kind of small-bore aircraft gun power-off protection dash current suppression circuit |
-
2017
- 2017-05-26 CN CN201720605792.4U patent/CN207082837U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378810A (en) * | 2018-11-12 | 2019-02-22 | 西安昆仑工业（集团）有限责任公司 | A kind of small-bore aircraft gun power-off protection dash current suppression circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180309 Termination date: 20210526 |
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| CF01 | Termination of patent right due to non-payment of annual fee |