CN105375457A - LED streetlight four-stage lightning protection module - Google Patents
LED streetlight four-stage lightning protection module Download PDFInfo
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- CN105375457A CN105375457A CN201410421173.0A CN201410421173A CN105375457A CN 105375457 A CN105375457 A CN 105375457A CN 201410421173 A CN201410421173 A CN 201410421173A CN 105375457 A CN105375457 A CN 105375457A
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Abstract
The invention discloses an LED streetlight lightning protection module. Varistors, a gaseous discharge tube and air core inductors form a multistage absorption network, residual voltage of instantaneous high voltage lightning strike on a driver and a light source is reduced, and a driving power supply and the LED light source are thus protected. The first-stage lightning protection system is composed of four varistors and a gaseous discharge tube, thereby realizing differential mode and common mode absorption; the second-stage lightning protection system is composed of two air core inductors and one varistor, a differential mode lightning strike is further protected, and lightning strike energy is discharged through the varistor between an L and an N; the third-stage lightning protection system is composed of a common-mode inductor and two safety capacitors for restraining common-mode current generated by the lightning strike; and the fourth-stage lightning protection system is also composed of two air core inductors and one varistor, and the differential mode lightning strike is further protected. Advantages of multiple lightning protection systems are integrated to form the four-stage lightning protection system. In the case of a 10kV/5kA lightning strike, the outputted residual voltage is lower than 700V, and the driving power supply and the LED light source can be effectively protected.
Description
Technical field
The present invention relates to LED street lamp lightning protection field.
Background technology
The main Four types of thunderbolt: 1. conduct thunder.Thunder and lightning at a distance hits circuit or the very high voltage because of electromagnetic induction generation, reaches electric equipment indoor in building by outdoor power circuit and communication line.2. direct lightning strike.Direct lightning strike contains great energy, and the thunder and lightning that crest voltage can reach 5000kv flows into ground, has great destructive power.Following three kinds of impacts can be caused: (1) huge rich electric current flows down ground in several gsec, makes earth potential pick up height rapidly, causes counterattack accident, the harm person and device security.(2) lightning current produces powerful electromagnetic wave, and high pulse voltage responded to by power line and holding wire.(3) lightning current flows through electric equipment and produces high heat, causes fire or explosion accident.3. induced lightening.Between cloud layer, the powerful electromagnetic wave of frequent electric discharge generation causes common and different mode to disturb, and affects electric equipment operation.4. switch overvoltage.Inductive in electric power system and capacity load are opened or disconnection, earth polar short circuit, power circuit short circuit etc., and can produce high-voltage pulse on power circuit, pulse voltage can reach 3 to 5 times of normal voltage, can badly damaged equipment.Execution is similar with thunderbolt.
The lightning protection measures that LED street lamp is traditional adopts fuse or wire wound resistor.Fuse is a kind of disposable elements be connected in order to protective circuit on circuit, when circuit power on flow through large time, make metal wire wherein or sheet produce high temperature and fuse, cause open circuit and interruptive current, avoid coming to harm with protective circuit.Need the fuse manually more renewed to resume operation to make circuit after old blown fuse, and for street lamp, if manually will change fuse, cost is quite high.And wire wound resistor is when as overcurrent protection, need the fault current of more than 4 times of rated current effectively to disconnect, at this moment just create the high temperature of 300 ~ 500 DEG C, very dangerous.So it is very necessary for researching and developing lightning protection measures of new generation.
Summary of the invention
The object of the invention is the LED street lamp lightning-protection module with a kind of superpower lightning protection capability, is intended to solve street lamp lightning Protection problem.
Thunderbolt have common and different mode two kinds, common mode and lightning induced surge be applied to L and N over the ground between, differential mode lightning induced surge is applied between L and N.
A kind of LED street lamp lightning-protection module synthesizes multistage absorption network by piezo-resistance, gas discharge tube, hollow inductive bank, reduce instantaneous pressure thunderbolt and be added to the residual voltage driven and on light source, thus protection drives driving power and LED light source.It is characterized in that comprising level Four lightning protection.
First order lightning-protection system is made up of four piezo-resistances and a gas discharge tube, the first order realizes the biabsorption of differential mode and common mode, if common mode is struck by lightning, then the high pressure of L and N forms loop by piezo-resistance and gas discharge tube to the earth, to release thunderbolt energy, if differential mode thunderbolt L and N forms loop, thunderbolt energy of releasing by the piezo-resistance of series connection.
Preferably, the puncture voltage of first order lightning-protection system gas discharge tube is between 600V ~ 800V, and through-current capacity is greater than 5000A.The clamp voltage of piezo-resistance is at 400V ~ 500V, and through-current capacity is greater than 5000A.
Second level lightning-protection system is made up of two air core inductors and a piezo-resistance, to differential mode thunderbolt further protection, to be released thunderbolt energy by the piezo-resistance between L and N.
Preferably, the clamp voltage of second level lightning-protection system piezo-resistance is at 300V ~ 400V, and through-current capacity is greater than 2000A.
Third level lightning-protection system is made up of a common mode inductance and two safety electric capacity, for suppressing the common mode current produced that is struck by lightning.When there being common mode current to flow through common mode inductance, due to the same tropism of common mode inductance, magnetic field in the same way can be produced in coil and increasing the induction reactance of coil, coil is made to show as high impedance, produce stronger damping, with this attenuation common-mode electric current, reach the object of lightning Protection.
Fourth stage lightning-protection system is also made up of two air core inductors and a piezo-resistance, to differential mode thunderbolt further protection, to be released thunderbolt energy by the piezo-resistance between L and N.
Preferably, the inductance value of the second level and fourth stage lightning-protection system air core inductor is between 4 μ H ~ 7 μ H.
Preferably, the clamp voltage of fourth stage lightning-protection system piezo-resistance is at 250V ~ 300V, and through-current capacity is greater than 2000A.
To sum up, the present invention combines the advantage of multiple lightning-protection system, constitutes level Four lightning-protection system.The present invention when 10kV/5kA is struck by lightning, can makes to export residual voltage lower than 700V, effectively protects driving power and LED light source.
Accompanying drawing explanation
Fig. 1 is LED street lamp level Four lightning-protection module according to an embodiment of the invention.
Fig. 2 is LED street lamp Pyatyi lightning-protection module according to another embodiment of the invention.
1, first order lightning protection; 2, second level lightning protection; 3, third level lightning protection; 4, fourth stage lightning protection.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not entire infrastructure.
The first embodiment of the present invention is as shown in Figure 1:
LED street lamp lightning-protection module includes level Four lightning protection measures.First order lightning-protection system is positioned at 220VAC input side, includes four piezo-resistances and a gas discharge tube, and wherein after two piezo-resistance parallel connections, an end is connected to L input line, the pin 1 of another termination gas discharge tube; After two other piezo-resistance parallel connection, an end is connected to N input line, the pin 3 of another termination gas discharge tube; Pin 2 ground connection of gas discharge tube.Like this, first order lightning-protection system can realize the biabsorption of differential mode and common mode, if common mode thunderbolt, then the high pressure of L and N forms loop by piezo-resistance and gas discharge tube to the earth, to release thunderbolt energy, if differential mode thunderbolt L and N forms loop, thunderbolt energy of releasing by the piezo-resistance of series connection.
Preferably, the puncture voltage of first order lightning-protection system gas discharge tube is between 600V ~ 800V, and through-current capacity is greater than 5000A.The clamp voltage of piezo-resistance is at 400V ~ 500V, and through-current capacity is greater than 5000A.
After second level lightning-protection system is positioned at first order lightning-protection system, include two air core inductors and a piezo-resistance, wherein these two air core inductors are serially connected in L and N respectively, piezo-resistance is connected across between L and N, second level lightning-protection system can to differential mode thunderbolt further protection, to be released thunderbolt energy by the piezo-resistance between L and N.
Preferably, the clamp voltage of second level lightning-protection system piezo-resistance is at 300V ~ 400V, and through-current capacity is greater than 2000A.
Third level lightning-protection system is between second level lightning-protection system and fourth stage lightning-protection system, include two X-type safety electric capacity and a common mode inductance, these two X-type safety capacitance profile are on the both sides of common mode inductance, be connected across between L and N, can absorb the peak voltage of common mode thunderbolt and electric current.
Fourth stage lightning-protection system is positioned at 220VAC outlet side, include two air core inductors and a piezo-resistance, wherein these two air core inductors are serially connected in L and N respectively, and piezo-resistance is connected across between L and N, to differential mode thunderbolt further protection, to be released thunderbolt energy by the piezo-resistance between L and N.
Preferably, the inductance value of the second level and fourth stage lightning-protection system air core inductor is between 4 μ H ~ 7 μ H.
Preferably, the clamp voltage of fourth stage lightning-protection system piezo-resistance is at 250V ~ 300V, and through-current capacity is greater than 2000A.
The second embodiment of the present invention is as shown in Figure 2:
The present embodiment is on the basis of the first embodiment, add one-level lightning-protection system, include Pyatyi lightning-protection system altogether, wherein the first order, the second level, the fourth stage are identical with the first embodiment with level V lightning-protection system, this one-level lightning-protection system increased is third level lightning-protection system, include two air core inductors and a piezo-resistance, two air core inductors are serially connected in L and N respectively, and piezo-resistance is connected across between L and N.Like this in this embodiment, the second level, the third level are identical with level V structure, are all the protection for being struck by lightning to differential mode, and so doing is because the broken by lightning of LED street lamp is mainly struck by lightning by differential mode and causes in actual applications.
Claims (10)
1.LED street lamp level Four lightning-protection module, synthesizes multistage absorption network by piezo-resistance, gas discharge tube, hollow inductive bank, it is characterized in that: comprise level Four lightning protection.
2. level Four lightning-protection module according to claim 1, is characterized in that:
First order lightning-protection system is made up of four piezo-resistances and a gas discharge tube, realize the biabsorption of differential mode and common mode, if common mode is struck by lightning, then the high pressure of L and N forms loop by piezo-resistance and gas discharge tube to the earth, to release thunderbolt energy, if differential mode thunderbolt L and N forms loop, thunderbolt energy of releasing by the piezo-resistance of series connection.
3. level Four lightning-protection module according to claim 1 and 2, is characterized in that:
In first order lightning-protection system, the 1st pin of gas discharge tube and the 3rd pin connect two piezo-resistances respectively, and the other end of two piezo-resistances connect meets input line L and N respectively.
4. the 2nd pin ground connection of gas discharge tube.
5. level Four lightning-protection module according to claim 3, is characterized in that:
After second level lightning-protection system is positioned at first order lightning-protection system, include two air core inductors and a piezo-resistance, wherein these two air core inductors are serially connected in L and N respectively, and piezo-resistance is connected across between L and N,
Level Four lightning-protection module according to claim 1 or 4, is characterized in that:
Third level lightning-protection system includes two X-type safety electric capacity and a common mode inductance, and these two X-type safety capacitance profile, on the both sides of common mode inductance, are connected across between L and N, can absorb the peak voltage of common mode thunderbolt and electric current.
6. level Four lightning-protection module according to claim 5, is characterized in that:
Fourth stage lightning-protection system is positioned at 220VAC outlet side, include two air core inductors and a piezo-resistance, wherein these two air core inductors are serially connected in L and N respectively, and piezo-resistance is connected across between L and N, to differential mode thunderbolt further protection, to be released thunderbolt energy by the piezo-resistance between L and N.
7. the level Four lightning-protection module according to claim 1 or 3, is characterized in that:
The puncture voltage of first order lightning-protection system gas discharge tube is between 600V ~ 800V, and through-current capacity is greater than 5000A.
8. the level Four lightning-protection module according to claim 1 or 4, is characterized in that:
The inductance value of the second level and fourth stage lightning-protection system air core inductor is between 4 μ H ~ 7 μ H.
9. the level Four lightning-protection module according to claim 3 or 4, is characterized in that:
The clamp voltage of first order lightning-protection system system piezo-resistance is at 400V ~ 500V, through-current capacity is greater than 5000A, the clamp voltage of second level lightning-protection system piezo-resistance is at 300V ~ 400V, through-current capacity is greater than 2000A, the clamp voltage of fourth stage lightning-protection system piezo-resistance is at 250V ~ 300V, and through-current capacity is greater than 2000A.
10. level Four lightning-protection module according to claim 1, is characterized in that:
On the basis of level Four lightning protection, increase one-level and become Pyatyi lightning protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421173.0A CN105375457A (en) | 2014-08-25 | 2014-08-25 | LED streetlight four-stage lightning protection module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410421173.0A CN105375457A (en) | 2014-08-25 | 2014-08-25 | LED streetlight four-stage lightning protection module |
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| CN105375457A true CN105375457A (en) | 2016-03-02 |
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| CN201410421173.0A Pending CN105375457A (en) | 2014-08-25 | 2014-08-25 | LED streetlight four-stage lightning protection module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026627A (en) * | 2016-06-30 | 2016-10-12 | 山东超越数控电子有限公司 | Method for improving surge immunity of switching power supply |
| CN107306027A (en) * | 2016-04-18 | 2017-10-31 | 中兴通讯股份有限公司 | The lightning protection device and Switching Power Supply of a kind of Switching Power Supply |
| CN114243662A (en) * | 2021-11-01 | 2022-03-25 | 南方电网数字电网研究院有限公司 | VFTO anti-interference circuit and switching device |
| CN114928037A (en) * | 2022-06-17 | 2022-08-19 | 北京航空航天大学宁波创新研究院 | Lightning protection type filter based on take temperature protection |
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2014
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| CN203589720U (en) * | 2013-10-25 | 2014-05-07 | 四川新力光源股份有限公司 | LED optical engine lightning protection apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107306027A (en) * | 2016-04-18 | 2017-10-31 | 中兴通讯股份有限公司 | The lightning protection device and Switching Power Supply of a kind of Switching Power Supply |
| CN107306027B (en) * | 2016-04-18 | 2021-01-26 | 中兴通讯股份有限公司 | Switching power supply's lightning protection device and switching power supply |
| CN106026627A (en) * | 2016-06-30 | 2016-10-12 | 山东超越数控电子有限公司 | Method for improving surge immunity of switching power supply |
| CN114243662A (en) * | 2021-11-01 | 2022-03-25 | 南方电网数字电网研究院有限公司 | VFTO anti-interference circuit and switching device |
| CN114928037A (en) * | 2022-06-17 | 2022-08-19 | 北京航空航天大学宁波创新研究院 | Lightning protection type filter based on take temperature protection |
| CN114928037B (en) * | 2022-06-17 | 2023-10-20 | 北京航空航天大学宁波创新研究院 | Lightning protection type filter based on temperature protection |
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Application publication date: 20160302 |
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