CN207381968U - A kind of anti-lightning strike power circuit for router - Google Patents
A kind of anti-lightning strike power circuit for router Download PDFInfo
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- CN207381968U CN207381968U CN201721466362.5U CN201721466362U CN207381968U CN 207381968 U CN207381968 U CN 207381968U CN 201721466362 U CN201721466362 U CN 201721466362U CN 207381968 U CN207381968 U CN 207381968U
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Abstract
The utility model discloses a kind of anti-lightning strike power circuits for router, including lightning protection circuit and current rectifying and wave filtering circuit, lightning protection circuit includes the first varistor, second varistor, 3rd varistor, first fuse, second fuse, 3rd fuse and discharge tube, 3rd varistor is connected in parallel between the phase line of power supply and zero curve, first fuse is connected in series between the phase line of power supply and the 3rd varistor, second fuse, first varistor, second varistor is sequentially connected in series with the 3rd fuse, and second one end of fuse be coupled to the phase line of power supply and the tie point of the first fuse, the other end of 3rd fuse is coupled to the zero curve of power supply, discharge tube one end is coupled to the tie point of the first varistor and the second varistor, the other end is grounded.A kind of anti-lightning strike power circuit for router of the utility model, to have the function that power supply lightning strike protection.
Description
Technical field
The utility model is related to router technology field, more specifically, it relates to a kind of for the anti-lightning strike of router
Power circuit.
Background technology
Router is each LAN, the equipment of wide area network in connection internet, it can be automatically selected according to the situation of channel
It is route with setting, with optimal path, the equipment that signal is sent by tandem.It is each to have been widely used for each row for router at present
Industry, the product of various difference class has become the connection of various backbone networks inside, backbone internetworking and backbone network and internet is mutual
Join the main force of interworking service.
Therefore be necessary to the security protection of router, because when using router, it may appear that do not close for a long time
The situation of router, but in thunderstorm weather, since router is in non-off-mode（I.e. power cord etc. does not pull out）, can
It can be influenced be subject to thunder and lightning, lightning current contacts and imports router by power cord, so as to the high voltage and high current of moment
The pressure-resistant not high electronic component of router interior can be burnt out.
Therefore need to propose a kind of new scheme to solve the problems, such as this.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of for the anti-lightning strike of router
Power circuit, to have the function that power supply lightning strike protection.
The above-mentioned technical purpose of the utility model technical scheme is that：It is a kind of for router
Anti-lightning strike power circuit, including the lightning protection circuit being connected with power supply and the rectifying and wave-filtering electricity for being coupled to lightning protection circuit output terminal
Road, the lightning protection circuit include the first varistor MOV1, the second varistor MOV2, the 3rd varistor MOV3, the first guarantor
Dangerous silk F1, the second fuse F2, the 3rd fuse F3 and discharge tube FDG, the 3rd varistor MOV3 are connected in parallel in
Between the phase line and zero curve of power supply, the first fuse F1 be connected in series in the phase line of power supply and the 3rd varistor MOV3 it
Between, the second fuse F2, the first varistor MOV1, the second varistor MOV2 and the 3rd fuse F3 are sequentially connected in series company
It connects, and one end of the second fuse F2 is coupled to the phase line of power supply and the tie point of the first fuse F1, the 3rd fuse F3's
The other end is coupled to the zero curve of power supply, and described discharge tube FDG one end is coupled to the first varistor MOV1 and the second varistor
The tie point of MOV2, other end ground connection.
By using above-mentioned technical proposal, when having a lightning stroke and lightning current contacts and when importing router by power cord,
It generates high voltage and high current imports power supply, and when the voltage for being added in varistor both ends is more than its operating voltage, resistance value
Reduce so that energy expenditure on varistor, and if electric current it is excessive when, the first fuse F1, the second fuse F2, the 3rd protect
Dangerous silk F3 can be burnt to protect late-class circuit, anti-lightning strike so as to have the function that.
The utility model is further arranged to：The current rectifying and wave filtering circuit includes the rectification that input terminal is coupled to lightning protection circuit
Bridge BG1 and filter capacitor C4, the filter capacitor C4 are connected in parallel in the output terminal of rectifier bridge BG1.
By using above-mentioned technical proposal, after the rectified bridge BG1 rectifications of alternating voltage, become the direct current with clutter
Pressure obtains more pure DC voltage after then being filtered using filter capacitor C4, and the capacity of filter capacitor C4 becomes larger, defeated
The AC ripple gone out will reduce.
The utility model is further arranged to：Input filter is connected in series between the lightning protection circuit and current rectifying and wave filtering circuit
Wave circuit.
By using above-mentioned technical proposal, input filter circuit has two-way buffer action, can inhibit from AC network
The interference signal of input, while it is also prevented from the harmonic wave generated during power work and electromagnetic interference signal influence AC network.
The utility model is further arranged to：The input filter circuit includes the first inductance L1, the second inductance L2, first
Capacitance C1, resistance R1, common mode inductance TR, the second capacitance C2 and the 3rd capacitance C3, the first capacitance C1 are connected in parallel in lightning protection
The output terminal of circuit, the first inductance L1 are connected in series between the output terminal of lightning protection circuit and one end of the first capacitance C1,
The second inductance L2 is connected in series between the output terminal of lightning protection circuit and the other end of the first capacitance C1, and the resistance R1 is simultaneously
The input terminal that connection is connected to the first capacitance C1, the common mode inductance TR is respectively coupled to the both ends of resistance R1, second capacitance
C2 is connected in series with the 3rd capacitance C3, and one end of the second capacitance C2 is connected to one end of common mode inductance TR output terminals, the 3rd electricity
The other end for holding C3 is connected to the tie point of the other end of common mode inductance TR output terminals, the second capacitance C2 and the 3rd capacitance C3
Ground connection.
By using above-mentioned technical proposal, the first inductance L1, the second inductance L2 and the first capacitance C1 form first order filtering,
And first capacitance C1 be mainly used to filter out DM EMI, and resistance R1 is avoided to provide discharge loop to the first capacitance C1 because of
Charge accumulated on one capacitance C1 influences the effect of filtering；Common mode inductance TR, the second capacitance C2 and the 3rd capacitance C3 carry out second
Grade filtering, the second capacitance C2 and the 3rd capacitance C3 are connected across the output terminal of common mode inductance TR, can effectively suppression common mode disturb.
The utility model is further arranged to：The company of series connection between the other end and current rectifying and wave filtering circuit of the 3rd capacitance C3
It is connected to thermistor RT1.
By using above-mentioned technical proposal, when electric power starting moment, since immediate current is big, add thermistor RT1 with regard to energy
Effectively prevent surge current, all consumption is on thermistor RT1 because of instantaneous energy, temperature-sensitive after temperature rise after a certain period of time
Resistance RT1 resistance values reduce, and at this moment the energy of its consumption is very small, and late-class circuit can work normally.
The utility model is further arranged to：The first capacitance C1 selects thin-film capacitor.
By using above-mentioned technical proposal, the high frequency characteristics of thin-film capacitor is preferable so that it filters out the effect of DM EMI
More preferably.
The utility model is further arranged to：The second capacitance C2 and the 3rd capacitance C3 Ceramics capacitors.
By using above-mentioned technical proposal, the second capacitance C2 and the 3rd capacitance C3 Ceramics capacitor can reduce electric leakage
Stream.
In conclusion the utility model has the advantages that：When having a lightning stroke and lightning current contacts and passes through power supply
When line imports router, generate high voltage and high current imports power supply, and when the voltage for being added in varistor both ends is more than its work
When making voltage, resistance value reduce so that energy expenditure on varistor, and if electric current it is excessive when, the first fuse F1, second
Fuse F2, the 3rd fuse F3 can burn to protect late-class circuit, anti-lightning strike so as to have the function that；And input filter is set
Circuit can inhibit the interference signal inputted from AC network, while the harmonic wave and electromagnetism that are also prevented from generating during power work are done
Disturb effect of signals AC network.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
In figure：1st, lightning protection circuit；2nd, current rectifying and wave filtering circuit；3rd, input filter circuit.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
A kind of anti-lightning strike power circuit for router, as shown in Figure 1, being connected including phase line L, the zero curve N with power supply
Lightning protection circuit 1 and be coupled to the current rectifying and wave filtering circuit 2 of 1 output terminal of lightning protection circuit, to power to router.
In the utility model, lightning protection circuit 1 includes the first varistor MOV1, the second varistor MOV2, the 3rd pressure-sensitive
Resistance MOV3, the first fuse F1, the second fuse F2, the 3rd fuse F3 and discharge tube FDG；Wherein, the 3rd pressure-sensitive electricity
Resistance MOV3 is connected in parallel between the phase line L of power supply and zero curve N, and the first fuse F1 is connected in series in the phase line L and the of power supply
Between three varistor MOV3, the second fuse F2, the first varistor MOV1, the second varistor MOV2 and the 3rd fuse
F3 is sequentially connected in series, and one end of the second fuse F2 is coupled to the tie point of the phase line L and the first fuse F1 of power supply, the
The other end of three fuse F3 is coupled to the zero curve N of power supply, and discharge tube FDG one end is coupled to the first varistor MOV1 and second
The tie point of varistor MOV2, other end ground connection.Discharge tube FDG therein is ceramic gas discharge tube.
When having a lightning stroke and lightning current contacts and when importing router by power cord, generate high voltage and high current imports
Power supply, when the voltage for being added in varistor both ends is more than its operating voltage, resistance value reduces so that energy expenditure is in the first pressure
On quick resistance MOV1, the second varistor MOV2 and the 3rd varistor MOV3, and if electric current it is excessive when, the first fuse F1,
Second fuse F2, the 3rd fuse F3 can burn to protect late-class circuit, anti-lightning strike so as to have the function that.
Current rectifying and wave filtering circuit 2 is coupled to the rectifier bridge BG1 of lightning protection circuit 1 and filter capacitor C4 including input terminal, filtering
Capacitance C4 is connected in parallel in the output terminal of rectifier bridge BG1；After the rectified bridge BG1 rectifications of alternating voltage, become straight with clutter
Galvanic electricity pressure obtains more pure DC voltage after then being filtered using filter capacitor C4, and the capacity of filter capacitor C4 becomes
Greatly, the AC ripple of output will reduce.
Meanwhile input filter circuit 3 is connected in series between lightning protection circuit 1 and current rectifying and wave filtering circuit 2, input filter electricity
Road 3 has two-way buffer action, can inhibit the interference signal inputted from AC network, while be also prevented from generating during power work
Harmonic wave and electromagnetic interference signal influence AC network.
In the utility model, input filter circuit 3 includes the first inductance L1, the second inductance L2, the first capacitance C1, resistance
R1, common mode inductance TR, the second capacitance C2 and the 3rd capacitance C3；Wherein, the first capacitance C1 is connected in parallel in the 3rd varistor
The both ends of MOV3, the first inductance L1 are connected in series between the 3rd varistor MOV3 one end and first capacitance C1 one end, and second
Inductance L2 is connected in series between the 3rd varistor MOV3 other ends and the first capacitance C1 other ends, and resistance R1 is connected in parallel in
First capacitance C1, two connectors of common mode inductance TR input terminals are connected to the both ends of resistance R1, the second capacitance C2 and the 3rd
Capacitance C3 is connected in series, and one end of the second capacitance C2 is connected to one end of common mode inductance TR output terminals, and the 3rd capacitance C3's is another
One end is connected to the tie point ground connection of the other end of common mode inductance TR output terminals, the second capacitance C2 and the 3rd capacitance C3.
Wherein, the first inductance L1, the second inductance L2 and the first capacitance C1 form first order filtering, and the first capacitance C1 is main
For filtering out DM EMI, and resistance R1 is avoided to provide discharge loop to the first capacitance C1 because of the charge on the first capacitance C1
Accumulation influences the effect of filtering；Common mode inductance TR, the second capacitance C2 and the 3rd capacitance C3 carry out second level filtering, the second capacitance C2
The output terminal of common mode inductance TR is connected across with the 3rd capacitance C3, can effectively suppression common mode be disturbed.
To prevent surge current, temperature-sensitive is connected in series between the other end of the 3rd capacitance C3 and current rectifying and wave filtering circuit 2
Resistance RT1；When electric power starting moment, since immediate current is big, thermistor RT1 is added just effectively to prevent surge current, because
All consumption is on thermistor RT1 for instantaneous energy, and thermistor RT1 resistance values reduce after temperature rise after a certain period of time, at this moment
The energy that it is consumed is very small, and late-class circuit can work normally.
In the utility model, the first capacitance C1 selects the preferable thin-film capacitor of high frequency characteristics so that it filters out DM EMI
It is better.
In the utility model, the second capacitance C2 and the 3rd capacitance C3 Ceramics capacitors can reduce leakage current.
It the above is only the preferred embodiment of the utility model, the scope of protection of the utility model is not limited merely to above-mentioned
Embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should be pointed out that pair
For those skilled in the art, several improvements and modifications under the premise of the utility model principle is not departed from,
These improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (7)
1. a kind of anti-lightning strike power circuit for router, it is characterised in that：Including the lightning protection circuit being connected with power supply（1）With
And it is coupled to lightning protection circuit（1）The current rectifying and wave filtering circuit of output terminal（2）, the lightning protection circuit（1）Including the first varistor
MOV1, the second varistor MOV2, the 3rd varistor MOV3, the first fuse F1, the second fuse F2, the 3rd fuse F3
And discharge tube FDG, the 3rd varistor MOV3 are connected in parallel between the phase line of power supply and zero curve, first insurance
Silk F1 is connected in series between the phase line of power supply and the 3rd varistor MOV3, the second fuse F2, the first varistor
MOV1, the second varistor MOV2 and the 3rd fuse F3 are sequentially connected in series, and one end of the second fuse F2 is coupled to electricity
The phase line in source and the tie point of the first fuse F1, the other end of the 3rd fuse F3 are coupled to the zero curve of power supply, the electric discharge
Pipe FDG one end is coupled to the tie point of the first varistor MOV1 and the second varistor MOV2, other end ground connection.
2. a kind of anti-lightning strike power circuit for router according to claim 1, it is characterised in that：The rectification filter
Wave circuit（2）Lightning protection circuit is coupled to including input terminal（1）Rectifier bridge BG1 and filter capacitor C4, the filter capacitor C4
It is connected in parallel in the output terminal of rectifier bridge BG1.
3. a kind of anti-lightning strike power circuit for router according to claim 2, it is characterised in that：The thunder-lightning
Road（1）With current rectifying and wave filtering circuit（2）Between be connected in series with input filter circuit（3）.
4. a kind of anti-lightning strike power circuit for router according to claim 3, it is characterised in that：The input filter
Wave circuit（3）Including the first inductance L1, the second inductance L2, the first capacitance C1, resistance R1, common mode inductance TR, the second capacitance C2 with
3rd capacitance C3, the first capacitance C1 are connected in parallel in lightning protection circuit（1）Output terminal, the first inductance L1 is connected in series
In lightning protection circuit（1）Output terminal and the first capacitance C1 one end between, the second inductance L2 is connected in series in lightning protection circuit
（1）Output terminal and the first capacitance C1 the other end between, the resistance R1 is connected in parallel in the first capacitance C1, the common mode electricity
The input terminal of sense TR is respectively coupled to the both ends of resistance R1, and the second capacitance C2 and the 3rd capacitance C3 is connected in series, and second
One end of capacitance C2 is connected to one end of common mode inductance TR output terminals, and it is defeated that the other end of the 3rd capacitance C3 is connected to common mode inductance TR
The tie point ground connection of the other end of outlet, the second capacitance C2 and the 3rd capacitance C3.
5. a kind of anti-lightning strike power circuit for router according to claim 4, it is characterised in that：3rd electricity
Hold the other end and current rectifying and wave filtering circuit of C3（2）Between be connected in series with thermistor RT1.
6. a kind of anti-lightning strike power circuit for router according to claim 4, it is characterised in that：First electricity
Hold C1 and select thin-film capacitor.
7. a kind of anti-lightning strike power circuit for router according to claim 4, it is characterised in that：Second electricity
Hold C2 and the 3rd capacitance C3 Ceramics capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721466362.5U CN207381968U (en) | 2017-11-06 | 2017-11-06 | A kind of anti-lightning strike power circuit for router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721466362.5U CN207381968U (en) | 2017-11-06 | 2017-11-06 | A kind of anti-lightning strike power circuit for router |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207381968U true CN207381968U (en) | 2018-05-18 |
Family
ID=62334302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721466362.5U Expired - Fee Related CN207381968U (en) | 2017-11-06 | 2017-11-06 | A kind of anti-lightning strike power circuit for router |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207381968U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301893A (en) * | 2018-09-25 | 2019-02-01 | 惠州亿纬锂能股份有限公司 | The power supply device of multiband voltage output |
| CN110011290A (en) * | 2019-05-14 | 2019-07-12 | 罗山县三通达电子科技有限公司 | A kind of Ethernet interface anti-surge circuit |
| CN110797853A (en) * | 2019-11-21 | 2020-02-14 | 东莞市鹏为科技有限公司 | Lightning protection circuit and lightning protection street lamp |
-
2017
- 2017-11-06 CN CN201721466362.5U patent/CN207381968U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301893A (en) * | 2018-09-25 | 2019-02-01 | 惠州亿纬锂能股份有限公司 | The power supply device of multiband voltage output |
| CN110011290A (en) * | 2019-05-14 | 2019-07-12 | 罗山县三通达电子科技有限公司 | A kind of Ethernet interface anti-surge circuit |
| CN110011290B (en) * | 2019-05-14 | 2021-10-22 | 罗山县三通达电子科技有限公司 | Ethernet interface anti-surge circuit |
| CN110797853A (en) * | 2019-11-21 | 2020-02-14 | 东莞市鹏为科技有限公司 | Lightning protection circuit and lightning protection street lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180518 Termination date: 20181106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |