CN206461349U - PoE surge prevention protection circuits - Google Patents
PoE surge prevention protection circuits Download PDFInfo
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- CN206461349U CN206461349U CN201621288406.5U CN201621288406U CN206461349U CN 206461349 U CN206461349 U CN 206461349U CN 201621288406 U CN201621288406 U CN 201621288406U CN 206461349 U CN206461349 U CN 206461349U
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- resistance
- transformer
- electric capacity
- breakover element
- poe
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Abstract
The utility model discloses a kind of PoE surge preventions protection circuit, includes filtration module, signal input part, signal output part, network electric power, RC circuits, the first surge prevention protection component and the second surge prevention protection component；The filtration module has the first transformer, the second transformer, the 3rd transformer and the 4th transformer for the setting that is connected in parallel to each other；The first protection surging component include resistance R1, resistance R2, can breakover element S1 and can breakover element S2.Because the positive pole and negative pole of network electric power have resistance R1 and resistance R2; controlled according to Ampere's law I=U/R during the invasion of PoE passages surging because of the first electric current for protecting positive pole after surging element turns GND/negative pole composition closed-loop path; so as to protect mainboard network electric power, short-circuit risks are effectively avoided.This PoE protrusion-dispellings protection circuit when surging is protected and tested or during surging invasion PoE network electric powers on the mainboard for not interfering with and being connected with RJ45 of powering be not damaged, for using bringing convenience.
Description
Technical field
The utility model is related to connector line area technology, refers in particular to a kind of PoE surge preventions protection circuit.
Background technology
RJ45 connectors possess two ports, one end connected with network cable (Cable Side), other end connection mainboard (PHY
Side) realize that network signal is transmitted, such as PC computers, server RJ45 connector applications, i.e. PHY Side are directly turned on
Be connected the Cable Side or increase Isolation Transformer And Common between PHY Side and Cable Side
Mode choke groups complete signal transmission.
RJ45 connectors with PoE functions provide direct current, such as networking telephone, the POS simultaneously in transmission network signal
Deng RJ45 PoE applications, i.e. PHY Side and Cable Side are in Isolation Transformer And Common mode
The completion signal transmission of choke groups is provided simultaneously with one or more groups of passage PHY Side and Cable Side and directly turns on transmission direct current
Electricity.
Surging invasion is subject to because RJ45 Cable Side need to be connected to by outdoor for netting twine, such as thunderbolt surging is drawn by netting twine
If not increasing surging protection to RJ45 Cable Side RJ45 connectors, incoming PHY Side are invaded computer motherboard by surging
And damage computer motherboard.RJ45 surge preventions typically can increase guard assembly in Cable Side and PHY Side, when surging enters
Surging is conducted to being connected to ground grounding components iron-clad (GND) and protects what is be connected with RJ45 PHY Side by guard assembly when invading
Mainboard, realizes that surging is protected.RJ45 PoE surge preventions connectors need to protect PoE passages while guard signal transmission channel,
When surging is invaded, surging is conducted to being connected to ground grounding components iron-clad (GND) and protects the mainboard that is connected with RJ45 by guard assembly
PHY Side Module and PoE Side Module, realize that PoE circuits surging is protected.
However, currently used for realizing its guard assembly for using of the circuit of surging protection for multiple normal open switch, this side
Formula when causing in surging persistent state, network electric power VC+ and VC- constitute closed-loop path because of guard assembly and GND conductings and
Short circuit, so as to cause PoE to power stopping, to using making troubles.
Utility model content
In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of PoE protrusion-dispellings to the utility model
Ripple protection circuit, it can effectively solve existing PoE surge preventions protection circuit causes PoE to power stopping in surging persistent state
The problem of.
To achieve the above object, the utility model is using following technical scheme：
A kind of PoE surge preventions protection circuit, include filtration module, signal input part, signal output part, network electric power,
RC circuits, the first surge prevention protection component and the second surge prevention protection component；The filtration module has the setting that is connected in parallel to each other
First transformer, the second transformer, the 3rd transformer and the 4th transformer；The signal input part connects the input of filtration module
Side, signal output part connects the outlet side of filtration module；The positive pole of the network electric power connects the primary coil of the first transformer
Centre tap, the negative pole of network electric power connects the centre tap of the primary coil of the second transformer；The RC circuit grounds are simultaneously connected
First transformer, the second transformer, the centre tap of the primary coil of the 3rd transformer and the 4th transformer；
The first protection surging component include resistance R1, resistance R2, can breakover element S1 and can breakover element S2；The electricity
Resistance R1 with can breakover element S1 concatenate, the resistance R1 after concatenation with can breakover element S1 its one ends connection the first transformer primary
The centre tap of coil and the positive pole of network electric power, other end ground connection；Resistance R2 with can breakover element S2 concatenate, after concatenation
Resistance R2 and can breakover element S2 its one ends connect the second transformer primary coil centre tap and the negative pole of network electric power,
The other end is grounded.
As a kind of preferred scheme, one end of the resistance R1 connect the primary coil of the first transformer centre tap and
The positive pole of network electric power, resistance R1 the other end connection can breakover element S1 one end, can breakover element S1 the other end ground connection.
As a kind of preferred scheme, one end of the resistance R2 connect the primary coil of the second transformer centre tap and
The negative pole of network electric power, resistance R2 the other end connection can breakover element S2 one end, can breakover element S2 the other end ground connection.
As a kind of preferred scheme, the second protection surging component includes can breakover element S3 and can breakover element
S4, this can breakover element S3 one end connect the 3rd transformer primary coil centre tap, can breakover element S3 it is another
End ground connection, this can breakover element S4 one end connect the 4th transformer primary coil centre tap, can breakover element S4
The other end is grounded.
As a kind of preferred scheme, the RC circuits include resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C0,
Electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity C4, electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity C4 one end connect first respectively
Transformer, the second transformer, the centre tap of the primary coil of the 3rd transformer and the 4th transformer, electric capacity C1, electric capacity C2, electricity
The other end for holding C3 and electric capacity C4 connects resistance R3, resistance R4, resistance R5 and resistance R6 one end respectively, resistance R3, resistance R4,
Resistance R5 and resistance the R6 other end are all connected with electric capacity C0 one end, electric capacity C0 other end ground connection.
The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology
Scheme is understood：
When surging is invaded, the first protection surging component is impacted by surging and turned on GND, is transferred to ground by surging
And prevent that high pressure surging from invading mainboard, because positive pole and the negative pole of network electric power have resistance R1 and resistance R2, according to Ampere's law I
=U/R and because first protects positive pole after surging element turns GND/negative pole composition closed-loop path when controlling the PoE passages surging to invade
Electric current, so as to protect mainboard network electric power, effectively avoids short-circuit risks.This PoE protrusion-dispellings protection circuit is protected in surging
PoE network electric powers on the mainboard for not interfering with and being connected with RJ45 of powering are not damaged during test or during surging invasion, to make
With bringing convenience.
More clearly to illustrate architectural feature of the present utility model and effect, come below in conjunction with the accompanying drawings with specific embodiment pair
The utility model is described in detail.
Brief description of the drawings
Fig. 1 is the structural representation of the preferred embodiment of the utility model；
Fig. 2 is the use state schematic diagram of the preferred embodiment of the utility model.
Accompanying drawing identifier declaration：
10th, filtration module 11, the first transformer
12nd, the second transformer 13, the 3rd transformer
14th, the 4th transformer 20, signal input part
30th, signal output part 40, network electric power
50th, RC circuits 60, the first surge prevention protection component
70th, the second surge prevention protection component.
Embodiment
It refer to shown in Fig. 1, that show the concrete structure of the preferred embodiment of the utility model, include filtering mould
Block 10, signal input part 20, signal output part 30, network electric power 40, RC circuits 50, the first surge prevention protection component 60 and the
Two surge preventions protect component 70.
The filtration module 10 has the first transformer 11, the second transformer 12, the 3rd transformer 13 for the setting that is connected in parallel to each other
With the 4th transformer 14；The signal input part 20 connects the input side of filtration module 10, the connection filtration module of signal output part 30
10 outlet side.
The centre tap of the primary coil of the first transformer of positive pole VC+ connections 11 of the network electric power 40, network electric power 40
The second transformer of negative pole VC- connections 12 primary coil centre tap, the RC circuits 50 are grounded and connect the first transformer
11st, the centre tap of the primary coil of the second transformer 12, the 3rd transformer 13 and the 4th transformer 14；In the present embodiment,
The RC circuits 50 include resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C0, electric capacity C1, electric capacity C2, electric capacity C3 and electricity
Hold C4, electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity C4 one end connect the first transformer 11, the second transformer 12, the respectively
The centre tap of the primary coil of three transformers 13 and the 4th transformer 14, electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity C4 it is another
One end connects resistance R3, resistance R4, resistance R5 and resistance R6 one end respectively, resistance R3, resistance R4, resistance R5 and resistance R6
The other end is all connected with electric capacity C0 one end, electric capacity C0 other end ground connection.
The first protection surging component 60 include resistance R1, resistance R2, can breakover element S1 and can breakover element S2；Should
Resistance R1 with can breakover element S1 concatenate, the resistance R1 after concatenation and can breakover element S1 its one ends connect the first transformer 11 it
The centre tap of primary coil and the positive pole VC+ of network electric power 40, other end ground connection；Resistance R2 with can breakover element S2 go here and there
Connect, the resistance R2 after concatenation and can breakover element S2 its one ends connect the second transformer 12 primary coil centre tap and net
The negative pole VC- of network power supply 40, other end ground connection.In the present embodiment, the resistance R1 one end connect the first transformer 11 it
The centre tap of primary coil and the positive pole VC+ of network electric power 40, resistance R1 the other end connection can breakover element S1 one end,
Can breakover element S1 the other end ground connection.One end of the resistance R2 connects the centre tap of the primary coil of the second transformer 12
With the negative pole VC- of network electric power 40, resistance R2 the other end connection can breakover element S2 one end, can breakover element S2 it is another
End ground connection.
The second protection surging component 70 include can breakover element S3 and can breakover element S4, this can breakover element S3
One end connect the 3rd transformer 13 primary coil centre tap, can breakover element S3 the other end ground connection, this can be turned on
Element S4 one end connects the centre tap of the primary coil of the 4th transformer 14, can breakover element S4 other end ground connection.
The operation principle that the present embodiment is described in detail is as follows：
As shown in Fig. 2 when being invaded by the surging that netting twine is introduced, the first protection surging component 60 is turning on network electric power 40 just
Pole VC+/negative pole VC- is connected with GND, by the positive pole VC+/negative pole VC- and the first transformer 11 and the second transformation of network electric power 40
The surging of the signal channel of device 12 is conducted to ground, and the second protection surging component 70 is connected in the conducting of surging intrusion response with GND,
The surging of 3rd transformer 13 and the signal channel of the 4th transformer 14 is conducted to ground, passes through the first protection surging component 60
The protection of RJ45 PoE surgings is completed with the second protection surging component 70.
This circuit is characterized in increase resistance inside the first protection surging component 60, and after tested, in test, PoE continues
Power supply.
When non-surge is invaded, the transmission of RJ45 PoE connector signals and the DC power transmission normal work of network electric power 40.
When surging is invaded, the first protection surging component 60 is impacted by surging and turned on GND, and surging is transferred to
Ground and prevent high pressure surging invade mainboard, because the positive pole VC+ and negative pole VC- of network electric power 40 have resistance R1 and resistance R2, root
Because first protects surging component 60 to turn on positive pole VC+ after GND/bear when controlling the PoE passages surging to invade according to Ampere's law I=U/R
Pole VC- constitutes the electric current of closed-loop path, so as to protect mainboard network electric power 40, effectively avoids short-circuit risks.This PoE prevents
Prominent protection circuit when surging is protected and tested or during surging invasion PoE mainboards for not interfering with and being connected with RJ45 of powering surf the Net
Network power supply 40 is not damaged.
It is described above, only it is preferred embodiment of the present utility model, not technical scope of the present utility model is made
Any limitation, therefore every any trickle amendment made according to technical spirit of the present utility model to above example, equivalent change
Change with modification, in the range of still falling within technical solutions of the utility model.
Claims (5)
1. a kind of PoE surge preventions protection circuit, includes filtration module, signal input part, signal output part, network electric power, RC
Circuit, the first surge prevention protection component and the second surge prevention protection component；The filtration module has the of the setting that is connected in parallel to each other
One transformer, the second transformer, the 3rd transformer and the 4th transformer；The signal input part connects the input side of filtration module,
Signal output part connects the outlet side of filtration module；The positive pole of the network electric power connects the centre of the primary coil of the first transformer
Tap, the negative pole of network electric power connects the centre tap of the primary coil of the second transformer；The RC circuit grounds and connection first
Transformer, the second transformer, the centre tap of the primary coil of the 3rd transformer and the 4th transformer；It is characterized in that：
The first protection surging component include resistance R1, resistance R2, can breakover element S1 and can breakover element S2；Resistance R1
With can breakover element S1 concatenate, the resistance R1 after concatenation and can breakover element S1 its one ends connect the first transformer primary coil
Centre tap and network electric power positive pole, the other end ground connection；Resistance R2 with can breakover element S2 concatenate, the resistance after concatenation
R2 and can breakover element S2 its one ends connect the second transformer primary coil centre tap and the negative pole of network electric power, it is another
End ground connection.
2. PoE surge preventions protection circuit according to claim 1, it is characterised in that：One end connection the of the resistance R1
The centre tap of the primary coil of one transformer and the positive pole of network electric power, resistance R1 other end connection can breakover element S1
One end, can breakover element S1 the other end ground connection.
3. PoE surge preventions protection circuit according to claim 1, it is characterised in that：One end connection the of the resistance R2
The centre tap of the primary coil of two transformers and the negative pole of network electric power, resistance R2 other end connection can breakover element S2
One end, can breakover element S2 the other end ground connection.
4. PoE surge preventions protection circuit according to claim 1, it is characterised in that：The second protection surging component bag
Included can breakover element S3 and can breakover element S4, this can breakover element S3 one end connect the primary coil of the 3rd transformer
Centre tap, can breakover element S3 the other end ground connection, this can breakover element S4 one end connect the 4th transformer primary line
The centre tap of circle, can breakover element S4 the other end ground connection.
5. PoE surge preventions protection circuit according to claim 1, it is characterised in that：The RC circuits include resistance R3,
Resistance R4, resistance R5, resistance R6, electric capacity C0, electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity C4, electric capacity C1, electric capacity C2, electric capacity
C3 and electric capacity C4 one end connect the primary line of the first transformer, the second transformer, the 3rd transformer and the 4th transformer respectively
The centre tap of circle, electric capacity C1, electric capacity C2, electric capacity C3 and electric capacity the C4 other end connect resistance R3, resistance R4, resistance R5 respectively
With resistance R6 one end, resistance R3, resistance R4, resistance R5 and resistance the R6 other end are all connected with electric capacity C0 one end, electric capacity C0
The other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621288406.5U CN206461349U (en) | 2016-11-29 | 2016-11-29 | PoE surge prevention protection circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621288406.5U CN206461349U (en) | 2016-11-29 | 2016-11-29 | PoE surge prevention protection circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206461349U true CN206461349U (en) | 2017-09-01 |
Family
ID=59692470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621288406.5U Expired - Fee Related CN206461349U (en) | 2016-11-29 | 2016-11-29 | PoE surge prevention protection circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206461349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581540A (en) * | 2018-06-08 | 2019-12-17 | 华为技术有限公司 | power supply equipment and power over Ethernet system |
-
2016
- 2016-11-29 CN CN201621288406.5U patent/CN206461349U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581540A (en) * | 2018-06-08 | 2019-12-17 | 华为技术有限公司 | power supply equipment and power over Ethernet system |
| US11183838B2 (en) | 2018-06-08 | 2021-11-23 | Huawei Technologies Co., Ltd. | Power sourcing equipment and power over ethernet system |
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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: 20170901 Termination date: 20181129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |