CN202111470U - Lightning and surging protection circuit - Google Patents
Lightning and surging protection circuit Download PDFInfo
- Publication number
- CN202111470U CN202111470U CN2011202294478U CN201120229447U CN202111470U CN 202111470 U CN202111470 U CN 202111470U CN 2011202294478 U CN2011202294478 U CN 2011202294478U CN 201120229447 U CN201120229447 U CN 201120229447U CN 202111470 U CN202111470 U CN 202111470U
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- piezo
- resistance
- power supply
- lightning
- supply input
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Abstract
The utility model relates to the technical field of switch power supply protection circuits, especially to a lightning and surging protection circuit used for switch power supply. The lightning and surging protection circuit comprises a lightning protection tube GDT (Gas Discharge Tube), a protective tube F1, a thermistor NTC (Negative Temperature Coefficient Thermistor), a voltage dependent resistor VZ1, a voltage dependent resistor VZ2, a voltage dependent resistor VZ3, a first output terminal, a second output terminal, a power supply input terminal N and a power supply terminal L. The circuit comprises two lightning protection branch circuits in parallel; the switch power supply can work normally when not struck by lightning, and when the lightning happens, the surge from electrical networks can be introduced into the ground for protecting all electronic components from damage and thereby taking the effects of lightning and surging protection; the wiring of the whole circuit is simple, which can effectively reduce production costs.
Description
Technical field
The utility model relates to the protective circuit of switch power source technical field, particularly relates to a kind of lightning protection anti-surge circuit that is used for Switching Power Supply.
Background technology
Thunderbolt is a kind of natural phenomena that has destructive power, and its voltage can be up to millions of volts, and immediate current can be up to hundreds thousand of amperes.Particularly China's southern area is in the subtropical zone; Lightening activity is frequent; Cause the accident of supply of electric power fault frequent because of the thunder and lightning disaster every year; Therefore, for reducing the infringement that thunderbolt causes normal supply of electric power, needing badly provides a kind of lightning protection anti-surge circuit that lightning protection effect is good, wiring is simple, cost is low that is used for Switching Power Supply.
Summary of the invention
The purpose of the utility model is to avoid weak point of the prior art and the lightning protection that a kind of lightning protection effect is good, wiring is simple, cost is low anti-surge circuit is provided.
The purpose of the utility model realizes through following technical measures:
A kind of lightning protection anti-surge circuit is provided, includes anti-thunder tube GDT, protective tube F1; Thermistor NTC, piezo-resistance VZ1, piezo-resistance VZ2, piezo-resistance VZ3, the 1st output, the 2nd output; Power supply input N end, power supply input L end, wherein, the end of thermistor NTC is connected with power supply input N end; The other end of thermistor NTC is connected with the end of piezo-resistance VZ1, the end of piezo-resistance VZ3, and the other end of piezo-resistance VZ1 is connected with the end of piezo-resistance VZ2, the end of anti-thunder tube GDT, another termination the earth of anti-thunder tube GDT; The other end of piezo-resistance VZ2 is connected with the other end of piezo-resistance VZ3, the end of protective tube F1; The other end of protective tube F1 is connected with power supply input L end, and the end of piezo-resistance VZ3 is connected with the 1st output, and the other end of piezo-resistance VZ3 is connected with the 2nd output.
Wherein, the model of said thermistor NTC is 3 Ω/10A.
Wherein, the model of said piezo-resistance VZ1, piezo-resistance VZ2 and piezo-resistance VZ3 is 20D471.
Wherein, the model of said anti-thunder tube GDT is T3.15AL.
The beneficial effect of the utility model:
A kind of lightning protection anti-surge circuit of the utility model includes anti-thunder tube GDT, protective tube F1; Thermistor NTC, piezo-resistance VZ1, piezo-resistance VZ2, piezo-resistance VZ3, the 1st output, the 2nd output; Power supply input N end, power supply input L end; Wherein, the end of thermistor NTC is connected with power supply input N end, and the other end of thermistor NTC is connected with the end of piezo-resistance VZ1, the end of piezo-resistance VZ3; The other end of piezo-resistance VZ1 is connected with the end of piezo-resistance VZ2, the end of anti-thunder tube GDT; Another termination the earth of anti-thunder tube GDT, the other end of piezo-resistance VZ2 is connected with the other end of piezo-resistance VZ3, the end of protective tube F1, and the other end of protective tube F1 is connected with power supply input L end; The end of piezo-resistance VZ3 is connected with the 1st output, and the other end of piezo-resistance VZ3 is connected with the 2nd output.In the foregoing circuit; Power supply input N end is connected with thermistor NTC, piezo-resistance VZ1, anti-thunder tube GDT; Power supply input L end is connected with protective tube F1, piezo-resistance VZ2, anti-thunder tube GDT; The two constitutes the lightning protection branch road of two parallel connections, and piezo-resistance VZ1, piezo-resistance VZ2 and anti-thunder tube GDT can effectively absorb between power supply input N and the earth, power supply is imported the lightning surge between L end and the earth, the lightning surge between piezo-resistance VZ3 absorption power supply input N and power supply input L hold.When thunderbolt not taking place, do not influence the operate as normal of Switching Power Supply, when thunderbolt takes place, can the surge from electrical network be imported the earth; Protect all electronic components not to be damaged; Thereby play the effect of the anti-surge of lightning protection, the entire circuit wiring is simple, effectively reduces production cost.
Description of drawings
Utilize accompanying drawing that the utility model is further specified, but the content in the accompanying drawing does not constitute any restriction to the utility model.
Fig. 1 is the circuit diagram of a kind of lightning protection anti-surge circuit of the utility model.
Embodiment
In conjunction with following examples the utility model is further described:
The embodiment of a kind of lightning protection anti-surge circuit of the utility model is as shown in Figure 1, includes anti-thunder tube GDT, protective tube F1; Thermistor NTC, piezo-resistance VZ1, piezo-resistance VZ2, piezo-resistance VZ3, the 1st output, the 2nd output; Power supply input N end, power supply input L end, wherein, the end of thermistor NTC is connected with an end of power supply input N end, capacitor C 1; The other end of thermistor NTC is connected with the end of piezo-resistance VZ1, the end of piezo-resistance VZ3; The other end of piezo-resistance VZ1 is connected with the end of piezo-resistance VZ2, the end of anti-thunder tube GDT, another termination the earth of anti-thunder tube GDT, and the other end of piezo-resistance VZ2 is connected with the other end of piezo-resistance VZ3, the end of protective tube F1; The other end of protective tube F1 is connected with power supply input L end; The other end of the other end of capacitor C 1, capacitor C 2 connects the earth, and the end of piezo-resistance VZ3 is connected with the 1st output, and the other end of piezo-resistance VZ3 is connected with the 2nd output.
In the foregoing circuit; Power supply input N end is connected with thermistor NTC, piezo-resistance VZ1, anti-thunder tube GDT; Power supply input L end is connected with protective tube F1, piezo-resistance VZ2, anti-thunder tube GDT; The two constitutes the lightning protection branch road of two parallel connections, and piezo-resistance VZ1, piezo-resistance VZ2 and anti-thunder tube GDT can effectively absorb between power supply input N and the earth, power supply is imported the lightning surge between L end and the earth, the lightning surge between piezo-resistance VZ3 absorption power supply input N and power supply input L hold.When thunderbolt not taking place, do not influence the operate as normal of Switching Power Supply, when thunderbolt takes place, can the surge from electrical network be imported the earth; Protect all electronic components not to be damaged; Thereby play the effect of the anti-surge of lightning protection, the entire circuit wiring is simple, effectively reduces production cost.
In the present embodiment, as embodiment preferred, the model of thermistor NTC is 3 Ω/10A.
The model of piezo-resistance VZ1, piezo-resistance VZ2 and piezo-resistance VZ3 is 20D471.
The model of anti-thunder tube GDT is T3.15AL.
Should be noted that at last; Above embodiment only be used to explain the utility model technical scheme but not to the restriction of the utility model protection range; Although the utility model has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model, and do not break away from the essence and the scope of the utility model technical scheme.
Claims (4)
1.
A kind of lightning protection anti-surge circuit is characterized in that: said lightning protection anti-surge circuit includes anti-thunder tube GDT, protective tube F1; Thermistor NTC, piezo-resistance VZ1, piezo-resistance VZ2, piezo-resistance VZ3, the 1st output, the 2nd output; Power supply input N end, power supply input L end; Wherein, the end of thermistor NTC is connected with power supply input N end, and the other end of thermistor NTC is connected with the end of piezo-resistance VZ1, the end of piezo-resistance VZ3; The other end of piezo-resistance VZ1 is connected with the end of piezo-resistance VZ2, the end of anti-thunder tube GDT; Another termination the earth of anti-thunder tube GDT, the other end of piezo-resistance VZ2 is connected with the other end of piezo-resistance VZ3, the end of protective tube F1, and the other end of protective tube F1 is connected with power supply input L end; The end of piezo-resistance VZ3 is connected with the 1st output, and the other end of piezo-resistance VZ3 is connected with the 2nd output.
2.
A kind of lightning protection anti-surge circuit according to claim 1 is characterized in that: the model of said thermistor NTC is 3 Ω/10A.
3.
A kind of lightning protection anti-surge circuit according to claim 2 is characterized in that: the model of said piezo-resistance VZ1, piezo-resistance VZ2 and piezo-resistance VZ3 is 20D471.
4.
A kind of lightning protection anti-surge circuit according to claim 1 is characterized in that: the model of said anti-thunder tube GDT is T3.15AL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202294478U CN202111470U (en) | 2011-07-01 | 2011-07-01 | Lightning and surging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202294478U CN202111470U (en) | 2011-07-01 | 2011-07-01 | Lightning and surging protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202111470U true CN202111470U (en) | 2012-01-11 |
Family
ID=45436919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202294478U Expired - Fee Related CN202111470U (en) | 2011-07-01 | 2011-07-01 | Lightning and surging protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202111470U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013149575A1 (en) * | 2012-04-01 | 2013-10-10 | 华为终端有限公司 | Lightning protection circuit, switching power supply and lightning protection method |
-
2011
- 2011-07-01 CN CN2011202294478U patent/CN202111470U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013149575A1 (en) * | 2012-04-01 | 2013-10-10 | 华为终端有限公司 | Lightning protection circuit, switching power supply and lightning protection method |
| CN103368164A (en) * | 2012-04-01 | 2013-10-23 | 华为终端有限公司 | Anti-lightning circuit, switching power supply and anti-lightning method |
| US9391445B2 (en) | 2012-04-01 | 2016-07-12 | Huawei Device Co., Ltd. | Surge protection circuit, switching power supply, and surge protection method |
| CN103368164B (en) * | 2012-04-01 | 2016-08-17 | 华为终端有限公司 | A kind of lightning protection circuit, Switching Power Supply and lightening arresting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20190701 |