CN208638027U - A kind of surging protection circuit - Google Patents
A kind of surging protection circuit Download PDFInfo
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- CN208638027U CN208638027U CN201821283053.9U CN201821283053U CN208638027U CN 208638027 U CN208638027 U CN 208638027U CN 201821283053 U CN201821283053 U CN 201821283053U CN 208638027 U CN208638027 U CN 208638027U
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Abstract
The utility model embodiment discloses a kind of surging protection circuit, which includes differential mode surge protective unit and common mode carrying out surge protection unit.Differential mode surge protective unit with firewire and zero curve for connecting respectively；Common mode carrying out surge protection unit includes varistor unit and gas discharge pipe unit；Gas discharge pipe unit connect and is grounded with varistor unit；Gas discharge pipe unit includes multiple gas-discharge tubes being serially connected；Wherein, the two sides of the portion gas discharge tube of a gas discharge pipe unit capacitor in parallel.Due in the early period for meeting with lightning surge, the capacitor charging of the two sides parallel connection of portion gas discharge tube and be equivalent to short-circuit conducting, at this time, the only gas-discharge tube conducting of some, so that the residual voltage of surging protection circuit is lower, to can also ensure that the residual voltage of gas discharge pipe unit is smaller and meets the requirement for protecting lightning surge while selecting the biggish gas discharge pipe unit of discharge voltage to meet resistance to pressure request.
Description
Technical field
The utility model relates to carrying out surge protection technical field more particularly to a kind of surging protection circuits.
Background technique
Surge (Electrical surge) be also surging, refers to the moment mistake for exceeding normal working voltage on electrical equipment
Voltage.Essentially, surge is a kind of violent pulse occurred within only several hundred times a ten thousandth second.Generate the original of surge
Because including internal cause, such as electrical equipment start and stop and failure and external cause such as thunder and lightning etc..
In outdoor environment, the natural phenomenas such as thunder and lightning often occur.Therefore, it is however generally that need to be arranged in outdoor
The equipment such as Switching Power Supply and LED drive power are equipped with surging protection circuit.
In the prior art, surging protection circuit usually only selects gas-discharge tube as protective device.Since gas is put
The residual voltage of fulgurite is higher, in order to meet the requirement of protection lightning surge, generally requires the selection lower gas of discharge voltage
Discharge tube.However, the pressure resistance of safety regulation certification at present is more demanding.In order to meet resistance to pressure request, then need to select electric discharge electricity
Press biggish gas-discharge tube.
As it can be seen that in the surging protection circuit of the prior art, it is difficult to while meeting and protecting lightning surge requirement and safety resistance to
Pressure request.
Utility model content
The utility model embodiment proposes a kind of surging protection circuit, it is intended to solve existing surging protection circuit and be difficult to simultaneously
The problem of meeting the requirement that protection lightning surge requires and safety is pressure-resistant.
To solve the above-mentioned problems, the utility model embodiment proposes a kind of surging protection circuit, the carrying out surge protection electricity
Road includes:
Differential mode surge protective unit, for being connect respectively with firewire and zero curve；
Common mode carrying out surge protection unit, including varistor unit and gas discharge pipe unit；The varistor unit
For connecting respectively with firewire and zero curve, the gas discharge pipe unit connect and is grounded with the varistor unit；Institute
Stating gas discharge pipe unit includes multiple gas-discharge tubes being serially connected；Wherein, the part gas of the gas discharge pipe unit
The two sides of a body discharge tube capacitor in parallel.
Its further technical solution is that the surging protection circuit further includes security unit, and the security unit includes
First fuse and the second fuse, first fuse are used to be set to firewire, and second fuse is for being set to
On zero curve.
Its further technical solution is that the differential mode surge protective unit includes the first varistor, first pressure
Quick resistance with firewire and zero curve for connecting respectively.
Its further technical solution is that the varistor unit includes the second varistor and the pressure-sensitive electricity of third
Resistance, second varistor with firewire for connecting and connecting with the gas discharge pipe unit, the third varistor
For connecting with zero curve and being connect with the gas discharge pipe unit.
Its further technical solution is that the common mode carrying out surge protection unit includes multiple gas-discharge tubes parallel with one another
Unit.
Pass through the technical solution of application the utility model embodiment, the gas discharge pipe unit packet of common mode carrying out surge protection unit
Multiple gas-discharge tubes being serially connected, and a two sides capacitor in parallel for the portion gas discharge tube of gas discharge pipe unit are included,
Due to meet with lightning surge early period, the capacitor charging of the two sides parallel connection of portion gas discharge tube and be equivalent to short-circuit conducting,
At this point, the only gas-discharge tube conducting of some, so that the residual voltage of surging protection circuit is lower, to discharge selecting
It can also ensure that the residual electricity of gas discharge pipe unit while the biggish gas discharge pipe unit of voltage is to meet resistance to pressure request
Press requirement that is smaller and meeting protection lightning surge.
Detailed description of the invention
In order to illustrate more clearly of the utility model embodiment technical solution, will make below to required in embodiment description
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of schematic block diagram for surging protection circuit that the utility model embodiment proposes；
Fig. 2 is the schematic diagram that residual voltage changes over time；
Fig. 3 is a kind of circuit diagram for surging protection circuit that the utility model embodiment proposes；
Fig. 4 is a kind of circuit diagram for surging protection circuit that another embodiment of the utility model proposes.
Appended drawing reference
Differential mode surge protective unit 10；Common mode carrying out surge protection unit 20；Varistor unit 21；Gas discharge pipe unit 22
And security unit 30.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, the technical solution in embodiment is carried out it is clear, complete
Ground describes, and similar reference numerals represent similar component in attached drawing.Obviously, will be described below embodiment is only that this is practical
Novel a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, belongs to the model of the utility model protection
It encloses.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that specific merely for the sake of describing in this utility model embodiment term used in the description
The purpose of embodiment and be not intended to limit the utility model embodiment.Such as in the utility model embodiment specification and appended power
As used in sharp claim, other situations unless the context is clearly specified, otherwise " one " of singular, "one"
And "the" is intended to include plural form.
Referring to Fig. 1, the utility model embodiment proposes a kind of surging protection circuit, as seen from the figure, the surging protection circuit
Including differential mode surge protective unit 10 and common mode carrying out surge protection unit 20.Common mode carrying out surge protection unit 20 includes varistor list
Member 21 and gas discharge pipe unit 22.
Differential mode surge protective unit 10 for being connect respectively with firewire L and zero curve N, with absorb firewire L and zero curve N it
Between differential mode surge.
Common mode carrying out surge protection unit 20 includes varistor unit 21 and gas discharge pipe unit 22.Varistor unit
21 with firewire L and zero curve N for connecting respectively, and gas discharge pipe unit 22 connect and is grounded with varistor unit 21.Altogether
Mould carrying out surge protection unit 20 is used to absorb the common mode surge between firewire L or zero curve N and the earth.
In the utility model embodiment, gas discharge pipe unit 22 includes multiple gas-discharge tubes being serially connected；Wherein,
The two sides of the portion gas discharge tube of gas discharge pipe unit 22 capacitor in parallel.
Referring to fig. 2, schematic diagram is changed over time for residual voltage.As seen from the figure, using traditional connection, (only gas is put
Fulgurite) carry out lightning surge test when, each gas-discharge tube simultaneously turns on, and residual voltage is gradually risen by t0-t3, residual in t3
Staying voltage is U5.
Using the utility model connection when, the t0-t1 stage, the capacitor charging of the two sides parallel connection of portion gas discharge tube and
It is equivalent to short-circuit conducting, at this point, only gas-discharge tube (gas-discharge tube of the non-shunt capacitance) conducting of some, residual electricity
It presses lower.In the t1-t2 stage, capacitor is to gas discharge tube discharge, so that residual voltage slightly improves, the final residual voltage in t2
For U6.As seen from the figure, U6 < U5, it is seen then that the utility model embodiment may make the more traditional connection of residual voltage low.
Pass through the technical solution of application the utility model embodiment, the gas discharge pipe unit packet of common mode carrying out surge protection unit
Multiple gas-discharge tubes being serially connected, and a two sides capacitor in parallel for the portion gas discharge tube of gas discharge pipe unit are included,
Due to meet with lightning surge early period, the capacitor charging of the two sides parallel connection of portion gas discharge tube and be equivalent to short-circuit conducting,
At this point, the only gas-discharge tube conducting of some, so that the residual voltage of surging protection circuit is lower, to discharge selecting
It can also ensure that the residual electricity of gas discharge pipe unit while the biggish gas discharge pipe unit of voltage is to meet resistance to pressure request
Press requirement that is smaller and meeting protection lightning surge.
Referring to Fig. 3, for a kind of circuit diagram for surging protection circuit that an embodiment of the present invention proposes, You Tuke
Know, which includes differential mode surge protective unit 10, common mode carrying out surge protection unit 20 and security unit 30.Common mode
Carrying out surge protection unit 20 includes varistor unit 21 and gas discharge pipe unit 22.
Differential mode surge protective unit 10 includes the first varistor RV1, the first varistor RV1 for respectively with firewire L
And zero curve N connection.
Further, security unit 30 includes that the first fuse F1 and the second fuse F2, the first fuse F1 are used for
On firewire L, the second fuse F2 is used to be set to zero curve N.
Further, varistor unit 21 includes the second varistor RV2 and third varistor RV3, and described the
For connecting with firewire L and connecting with gas discharge pipe unit 22, third varistor RV3 is used for and 0 two varistor RV2
It line N connection and is connect with gas discharge pipe unit 22.
Further, gas discharge pipe unit 22 connect and is grounded with varistor unit 21；Gas discharge pipe unit 22
Including multiple gas-discharge tube GDT being serially connected；Wherein, there are two gas-discharge tube GDT in gas discharge pipe unit 22
Two sides parallel connection one have capacitor C.
Referring to fig. 4, a kind of circuit diagram of the surging protection circuit proposed for another embodiment of the utility model, You Tuke
Know, which includes differential mode surge protective unit 10, common mode carrying out surge protection unit 20 and security unit 30.Common mode
Carrying out surge protection unit 20 includes varistor unit 21 and multiple gas discharge pipe units 22 parallel with one another.
Differential mode surge protective unit 10 includes the first varistor RV1, the first varistor RV1 for respectively with firewire L
And zero curve N connection.
Further, security unit 30 includes that the first fuse F1 and the second fuse F2, the first fuse F1 are used for
On firewire L, the second fuse F2 is used to be set to zero curve N.
Further, varistor unit 21 includes the second varistor RV2 and third varistor RV3, and described the
For connecting with firewire L and connecting with gas discharge pipe unit 22, third varistor RV3 is used for and 0 two varistor RV2
It line N connection and is connect with gas discharge pipe unit 22.
Further, gas discharge pipe unit 22 connect and is grounded with varistor unit；Gas discharge pipe unit 22 wraps
Include multiple gas-discharge tube GDT being serially connected；Wherein, there are two gas-discharge tube GDT's in gas discharge pipe unit 22
Two sides parallel connection one has capacitor C.
It should be noted that being born by the electric current that surging protection circuit can be improved in multiple gas discharge pipe units 22 in parallel
Ability.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in some embodiment
Part, reference can be made to the related descriptions of other embodiments.
Obviously, it is practical without departing from this can to carry out various modification and variations to the utility model by those skilled in the art
Novel spirit and scope.In this way, even these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
The above is specific embodiment of the present utility model, but the protection scope of the utility model is not limited to
This, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in various etc.
The modifications or substitutions of effect, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this is practical new
The protection scope of type should be subject to the protection scope in claims.
Claims (5)
1. a kind of surging protection circuit characterized by comprising
Differential mode surge protective unit, for being connect respectively with firewire and zero curve；
Common mode carrying out surge protection unit, including varistor unit and gas discharge pipe unit；The varistor unit is used for
It is connect respectively with firewire and zero curve, the gas discharge pipe unit connect and is grounded with the varistor unit；The gas
Body electric discharge pipe unit includes multiple gas-discharge tubes being serially connected；Wherein, the portion gas of the gas discharge pipe unit is put
The two sides of a fulgurite capacitor in parallel.
2. surging protection circuit according to claim 1, which is characterized in that the surging protection circuit further includes insurance policy
Member, the security unit include the first fuse and the second fuse, and first fuse is used to be set to firewire, described
Second fuse is used to be set to zero curve.
3. surging protection circuit according to claim 1, which is characterized in that the differential mode surge protective unit includes first
Varistor, first varistor with firewire and zero curve for connecting respectively.
4. surging protection circuit according to claim 1, which is characterized in that the varistor unit includes second pressure-sensitive
Resistance and third varistor, second varistor with firewire for connecting and connecting with the gas discharge pipe unit
It connects, the third varistor with zero curve for connecting and connecting with the gas discharge pipe unit.
5. surging protection circuit according to claim 1, which is characterized in that the common mode carrying out surge protection unit includes multiple
Gas discharge pipe unit parallel with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821283053.9U CN208638027U (en) | 2018-08-09 | 2018-08-09 | A kind of surging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821283053.9U CN208638027U (en) | 2018-08-09 | 2018-08-09 | A kind of surging protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208638027U true CN208638027U (en) | 2019-03-22 |
Family
ID=65740876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821283053.9U Active CN208638027U (en) | 2018-08-09 | 2018-08-09 | A kind of surging protection circuit |
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| CN (1) | CN208638027U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695837A (en) * | 2018-08-09 | 2018-10-23 | 茂硕科技有限公司 | A kind of surging protection circuit |
-
2018
- 2018-08-09 CN CN201821283053.9U patent/CN208638027U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695837A (en) * | 2018-08-09 | 2018-10-23 | 茂硕科技有限公司 | A kind of surging protection circuit |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220707 Address after: No.1061, xilizongbai Road, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN MOSO POWER ELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 518000 4th floor, Santai Industrial Park, Songbai 1061, Xili street, Nanshan District, Shenzhen, Guangdong Province Patentee before: MAOSHUO TECHNOLOGY Co.,Ltd. |