CN210629098U - Lightning protection circuit - Google Patents
Lightning protection circuit Download PDFInfo
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- CN210629098U CN210629098U CN201922102736.0U CN201922102736U CN210629098U CN 210629098 U CN210629098 U CN 210629098U CN 201922102736 U CN201922102736 U CN 201922102736U CN 210629098 U CN210629098 U CN 210629098U
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- power supply
- discharge tube
- electric discharge
- protection system
- lightning protection
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Abstract
The utility model discloses a lightning protection circuit, which comprises a DC power supply and a primary protection system, wherein the primary protection system comprises a first electric discharge tube, a first capacitor and a second electric discharge tube, and the anode of the DC power supply is grounded through the first electric discharge tube and the first capacitor respectively; one end of the second electric discharge tube is connected with the positive pole of the DC power supply, and the other end of the second electric discharge tube is connected with the negative pole of the DC power supply. The two ends of the second electric discharge tube are respectively connected with the positive electrode and the negative electrode of the DC power supply and used for differential mode protection of the DC power supply, and the two ends of the second electric discharge tube and the primary protection system jointly act, so that the protection diversity of the lightning protection circuit can be improved, and the lightning protection effect is improved.
Description
Technical Field
The utility model relates to a power electronic technology field especially relates to a lightning protection circuit.
Background
In the mobile communication technology, a DC power supply is usually used as a main power supply source for driving and adjusting in a base station antenna, and as the base station is generally arranged outdoors, the outdoor severe environment has higher requirements on the DC power supply, and special lightning protection needs to be carried out on the base station DC power supply particularly in the outdoor open environment. The protection circuit that uses on the market at present sets up the lightning protection circuit usually at the positive and negative pole of DC power, but this kind of protection circuit protective properties is relatively poor, and the effect is also more single, can only protect specific thunder and lightning type, is difficult to satisfy user's multiple user demand.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the lightning protection circuit with good protection performance is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: a lightning protection circuit comprises a DC power supply and a primary protection system, wherein the primary protection system comprises a first electric discharge tube, a first capacitor and a second electric discharge tube, and the positive electrode of the DC power supply is grounded through the first electric discharge tube and the first capacitor respectively; one end of the second electric discharge tube is connected with the positive pole of the DC power supply, and the other end of the second electric discharge tube is connected with the negative pole of the DC power supply.
Furthermore, the primary protection system further comprises a third electric discharge tube and a second capacitor, and the negative electrode of the DC power supply is grounded through the third electric discharge tube and the second capacitor, respectively.
Further, still include the second grade protection system, the second grade protection system includes first inductance and first TVS pipe, first inductance and first TVS pipe in proper order with the DC power connects in series.
Furthermore, the inductance value of the first inductor is 10-200 uH.
Further, still include tertiary protection system, tertiary protection system includes second inductance and second TVS pipe, second inductance and second TVS pipe in proper order with the DC power source is established ties.
Furthermore, the inductance value of the second inductor is 10-200 uH.
The beneficial effects of the utility model reside in that: the two ends of the second electric discharge tube are respectively connected with the positive electrode and the negative electrode of the DC power supply and used for differential mode protection of the DC power supply, and the two ends of the second electric discharge tube and the primary protection system jointly act, so that the protection diversity of the lightning protection circuit can be improved, and the lightning protection effect is improved.
Drawings
Fig. 1 is a circuit diagram of a lightning protection circuit according to a first embodiment of the present invention.
Description of reference numerals:
g1, a first electric discharge tube;
g2, a second electric discharge tube;
g3, a third electric discharge tube;
c1, a first capacitance;
c2, a second capacitor;
l1, a first inductor;
l2, a second inductor;
d1, a first TVS tube;
d2, a second TVS tube.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: and two ends of the second electric discharge tube are respectively connected with the anode and the cathode of the DC power supply and used for differential mode protection of the DC power supply.
Referring to fig. 1, a lightning protection circuit includes a DC power supply and a primary protection system, the primary protection system includes a first electrical discharge tube G1, a first capacitor C1 and a second electrical discharge tube G2, and an anode of the DC power supply is grounded through the first electrical discharge tube G1 and the first capacitor C1, respectively; one end of the second electric discharge tube G2 is connected to the positive electrode of the DC power supply, and the other end is connected to the negative electrode of the DC power supply.
The working principle of the utility model is as follows: the primary protection system is connected to the positive pole of the DC power supply and used for lightning protection on the positive pole of the DC power supply, and the second electric discharge tube connected to the positive pole and the negative pole of the DC power supply is used for lightning protection between the two poles of the DC power supply, so that the lightning protection diversity of the DC power supply is increased.
From the above description, the beneficial effects of the present invention are: the two ends of the second electric discharge tube are respectively connected with the positive electrode and the negative electrode of the DC power supply and used for differential mode protection of the DC power supply, and the two ends of the second electric discharge tube and the primary protection system jointly act, so that the protection diversity of the lightning protection circuit can be improved, and the lightning protection effect is improved.
Further, the primary protection system further comprises a third electric discharge tube G3 and a second capacitor C2, and the negative electrode of the DC power supply is grounded through the third electric discharge tube G3 and the second capacitor C2, respectively.
As can be seen from the above description, the third electric discharge tube and the second capacitor connected to the negative electrode of the DC power supply are used for lightning protection of the negative electrode of the DC power supply, and form an all-directional protection for the DC power supply.
Further, the protection system comprises a second-stage protection system, wherein the second-stage protection system comprises a first inductor L1 and a first TVS tube D1, and the first inductor L1 and the first TVS tube D1 are sequentially connected with the DC power supply in series.
According to the description, the secondary protection system can perform secondary voltage limiting on the DC power supply, and effectively reduces the lightning surge overvoltage in the DC power supply.
Further, the inductance value of the first inductor L1 is 10-200 uH.
Further, the three-stage protection system comprises a second inductor L2 and a second TVS tube D2, wherein the second inductor L2 and the second TVS tube D2 are sequentially connected in series with the DC power supply.
Further, the inductance value of the second inductor L2 is 10-200 uH.
Example one
Referring to fig. 1, a first embodiment of the present invention is: a lightning protection circuit comprises a DC power supply and a primary protection system, wherein the primary protection system comprises a first electric discharge tube G1, a first capacitor C1 and a second electric discharge tube G2, and the positive pole of the DC power supply is grounded through the first electric discharge tube G1 and the first capacitor C1 respectively; one end of the second electric discharge tube G2 is connected to the positive electrode of the DC power supply, and the other end is connected to the negative electrode of the DC power supply.
Referring to fig. 1, the primary protection system further includes a third electrical discharge tube G3 and a second capacitor C2, and the negative terminal of the DC power source is grounded through the third electrical discharge tube G3 and the second capacitor C2, respectively.
In detail, the protection device further comprises a secondary protection system, wherein the secondary protection system comprises a first inductor L1 and a first TVS tube D1, and the first inductor L1 and the first TVS tube D1 are sequentially connected in series with the DC power supply. In the embodiment, the primary protection system can effectively restrain the lightning impulse within several hundred volts between 8 and 20 uS; the secondary system protection can limit the voltage to within a few volts.
Specifically, the three-stage protection system comprises a second inductor L2 and a second TVS tube D2, wherein the second inductor L2 and the second TVS tube D2 are sequentially connected in series with the DC power supply.
Optionally, the inductance value of the first inductor L1 is 10-200uH, the inductance value of the second inductor L2 is 10-200uH, and preferably, the inductance values of the first inductor L1 and the second inductor L2 are both 27 uH.
To sum up, the utility model provides a lightning protection circuit, the positive negative pole of DC power is connected respectively at the both ends of second electric discharge tube for the differential mode protection of DC power, and with the combined action of one-level protection system, can improve the variety that lightning protection circuit protected, improved lightning protection effect.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (6)
1. A lightning protection circuit, its characterized in that: the DC power supply comprises a DC power supply and a primary protection system, wherein the primary protection system comprises a first electric discharge tube, a first capacitor and a second electric discharge tube, and the positive electrode of the DC power supply is grounded through the first electric discharge tube and the first capacitor respectively; one end of the second electric discharge tube is connected with the positive pole of the DC power supply, and the other end of the second electric discharge tube is connected with the negative pole of the DC power supply.
2. The lightning protection circuit of claim 1, wherein: the primary protection system further comprises a third electric discharge tube and a second capacitor, and the negative electrode of the DC power supply is grounded through the third electric discharge tube and the second capacitor respectively.
3. The lightning protection circuit of claim 1, wherein: still include the second grade protection system, the second grade protection system includes first inductance and second TVS pipe, first inductance and first TVS pipe in proper order with the DC power connects in series.
4. The lightning protection circuit of claim 3, wherein: the inductance value of the first inductor is 10-200 uH.
5. The lightning protection circuit of claim 1, wherein: still include tertiary protection system, tertiary protection system includes second inductance and second TVS pipe, second inductance and second TVS pipe in proper order with the DC power source is established ties.
6. The lightning protection circuit of claim 5, wherein: the inductance value of the second inductor is 10-200 uH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102736.0U CN210629098U (en) | 2019-11-27 | 2019-11-27 | Lightning protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102736.0U CN210629098U (en) | 2019-11-27 | 2019-11-27 | Lightning protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210629098U true CN210629098U (en) | 2020-05-26 |
Family
ID=70750133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922102736.0U Active CN210629098U (en) | 2019-11-27 | 2019-11-27 | Lightning protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210629098U (en) |
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2019
- 2019-11-27 CN CN201922102736.0U patent/CN210629098U/en active Active
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