CN115275958B - Lightning protection circuit of power down circuit of communication power supply - Google Patents
Lightning protection circuit of power down circuit of communication power supply Download PDFInfo
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- CN115275958B CN115275958B CN202211186229.XA CN202211186229A CN115275958B CN 115275958 B CN115275958 B CN 115275958B CN 202211186229 A CN202211186229 A CN 202211186229A CN 115275958 B CN115275958 B CN 115275958B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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Abstract
The invention discloses a lightning protection circuit of a power-down circuit of a communication power supply, which comprises a lightning protection module and a diode pressure relief circuit, wherein the power-down circuit of the communication power supply comprises a direct-current input end, a direct-current output end and an output ORING tube; the lightning protection module is connected between the positive pole of the direct current output end and the negative pole of the direct current output end; the diode pressure relief circuit comprises a plurality of diode slow tubes and a plurality of diode fast tubes, wherein anodes of the diode slow tubes are connected with the negative electrode of the direct current output end, and cathodes of the diode slow tubes are connected with the positive electrode of the direct current output end; the anode of the diode fast tube is connected with the cathode of the direct current output end, and the cathode of the diode fast tube is connected with the anode of the direct current output end. The diode voltage-relief circuit can provide an effective path for lightning stroke energy, prevent excessive energy from flowing through the output ORING tube and provide effective protection for the output ORING tube.
Description
Technical Field
The invention relates to a lightning protection circuit, in particular to a lightning protection circuit of a power down circuit of a communication power supply.
Background
With the rise of the communication industry, 5G communication will become the mainstream in the future, and the product is the power supply equipment for 5G communication, the requirement on the reliability of the product is stricter, and therefore the required lightning protection grade is improved linearly compared with the traditional power supply.
In a differential mode lightning stroke state, when the voltage of the negative electrode of the direct current output end is positive and the voltage of the positive electrode DC + of the direct current output end is negative, energy firstly flows through the output ORING tube, and the residual energy is too high, so that the output ORING tube can be directly damaged; when the common-mode lightning stroke arrives, when the energy is the negative pole of the direct current output end to the ground, the energy can directly flow through the ORING tube and can directly damage the output ORING tube. Therefore, the output ORING tube can be damaged by differential mode lightning strike or common mode lightning strike of the power-off circuit of the traditional communication power supply.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a lightning protection circuit of a communication power supply power-off circuit, which can protect an output ORING tube.
In order to solve the technical problems, the invention adopts the technical scheme that the lightning protection circuit of the power-down circuit of the communication power supply comprises a lightning protection module and a diode pressure relief circuit, the power-down circuit of the communication power supply comprises a direct-current input end, a direct-current output end and an output ORING pipe, the positive pole of the direct-current input end is connected with the positive pole of the direct-current output end, and the negative pole of the direct-current input end is connected with the negative pole of the direct-current output end through the output ORING pipe; the lightning protection module is connected between the positive pole of the direct current output end and the negative pole of the direct current output end; the diode pressure relief circuit comprises a plurality of diode slow tubes and a plurality of diode fast tubes, wherein the anodes of the diode slow tubes are connected with the cathodes of the direct current output ends, and the cathodes of the diode slow tubes are connected with the anodes of the direct current output ends; the anode of the diode fast tube is connected with the cathode of the direct current output end, and the cathode of the diode fast tube is connected with the anode of the direct current output end.
The lightning protection circuit and the diode pressure relief circuit comprise a plurality of patch rectifier bridges, and each patch rectifier bridge comprises two diode slow tubes connected with each other by cathodes or two diode slow tubes connected with each other by anodes.
The lightning protection circuit comprises an input capacitor and a discharge circuit, wherein the input capacitor is connected between the positive pole of the direct current input end and the negative pole of the direct current input end; the discharge circuit comprises two voltage dependent resistors and a discharge tube, the two voltage dependent resistors are connected in series and then connected in parallel with the input capacitor, one end of the discharge tube is connected with the series connection point of the two voltage dependent resistors, and the other end of the discharge tube is grounded.
In the lightning protection circuit, the output ORING tube includes a plurality of MOS tubes, the sources of the MOS tubes are connected to the negative electrode of the dc input terminal, the drains are connected to the negative electrode of the dc output terminal, and the gates are connected to the driving signal input terminal of the output ORING tube.
In the lightning protection circuit, when the voltage of the negative electrode of the direct current output end is positive and the voltage of the positive electrode of the direct current output end is negative due to the differential mode lightning stroke energy, most of the differential mode lightning stroke energy flows through the lightning protection module and returns to the lightning equipment, and the redundant differential mode lightning stroke energy flows through the diode pressure relief circuit and returns to the lightning equipment; a small amount of differential mode lightning strike energy flows through the output ORING tube, residual energy is absorbed by the input capacitor, and the residual voltage of the differential mode lightning strike energy is clamped by the two piezoresistors of the discharge circuit.
When the equipment connected with the direct current output end is subjected to common-mode lightning stroke, part of lightning stroke energy input by the direct current output end flows through the diode pressure relief circuit and the discharge circuit to be released to the ground; another part of the lightning stroke energy input by the direct current output end flows through the output ORING tube and the discharge circuit to be discharged to the ground.
The diode pressure relief circuit of the lightning protection circuit can provide an effective path for lightning stroke energy, prevent excessive energy from flowing through the output ORING tube and provide effective protection for the output ORING tube.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a circuit of a lightning protection circuit of a circuit under a communication power supply according to an embodiment of the present invention.
FIG. 2 is a diagram of the path of energy flow when the negative pole of the output of the differential mode energy power supply is positive relative to the positive pole of the output of the differential mode energy power supply in accordance with an embodiment of the present invention.
FIG. 3 is a diagram illustrating the energy flow path when the common mode energy is output negative to ground according to an embodiment of the present invention.
Detailed Description
The structure and the principle of the power-down circuit of the communication power supply of the embodiment of the invention are shown in figures 1 to 3. As shown in figure 1, the power-down circuit of the communication power supply comprises a direct current input end, a direct current output end, an output ORING tube and a lightning protection circuit, and the lightning protection circuit comprises a lightning protection module LIGHT 1, a diode voltage-relief circuit, an input capacitor and a discharge circuit. The lightning protection module LIGHT 1 used in the embodiment of the invention is TM20PC1-050, the rated working voltage of the module is-48 Vdc, the maximum continuous working voltage is 65Vdc, and the lightning protection module is suitable for the output voltage range of the power supply in the embodiment. This module nominal discharge current is 10KA, and the thunderbolt energy that actual test used is 10KA, and is comparatively critical, and the actual measurement is not enough to the discharge capacity of test thunderbolt, leaves certain residual energy, damages the device then, for saving the cost, in order to prevent selecting for use high-end lightning protection module, for example nominal discharge energy is 20 KA's lightning protection module, has increased diode pressure release circuit for this, releases unnecessary energy, prevents to damage key device.
The positive pole 54+ of the direct current input end is connected with the positive pole DC + of the direct current output end, and the negative pole 54-of the direct current input end is connected with the negative pole DC-of the direct current output end through the output ORING tube.
The output ORING tube comprises 4 MOS tubes ORING1, ORING2, ORING3 and ORING4, the sources of the 4 MOS tubes are connected with the negative electrode 54 of the direct current input end, the drains are connected with the negative electrode DC of the direct current output end, and the grids are connected with the driving signal input end 12VS of the output ORING tube.
The lightning protection module LIGHT 1 is connected between the positive pole DC + of the direct current output end and the negative pole DC-of the direct current output end.
The diode pressure relief circuit comprises 4 diodes D1, D2, D3 and D4 and two patch rectifier bridges BRG1 and BRG2. The 4 ES3J diodes D1, D2, D3 and D4 are fast diodes, the 4 diodes D1, D2, D3 and D4 are connected in parallel, the anode is connected with the negative pole DC-of the direct current output end, and the cathode is connected with the positive pole DC + of the direct current output end. Each patch rectifier bridge utilizes two diodes to short-circuit the alternating current end of the rectifier bridge, and is connected with the anodes of the diodes D1, D2, D3 and D4, the negative end of the rectifier bridge is suspended, the positive end of the rectifier bridge is connected with the anode DC + of the direct current output end, and the diodes in the patch rectifier bridges BRG1 and BRG2 are slow tubes. Therefore, the patch rectifier bridges BRG1 and BRG2 can utilize the diode slow tube (or the diode slow tube with two anodes connected) in which two cathodes are connected, and the used 4 slow tubes are connected in parallel, which is the anode connected to the negative electrode DC "of the DC output terminal, and the cathode connected to the positive electrode DC + of the DC output terminal. The slow tube has large flow rate, and the combination of the fast tube and the slow tube is favorable for the flow of residual energy to prevent the damage of devices.
The input capacitor comprises a capacitor C1 and a capacitor C2, and the capacitor C1 and the capacitor C2 are connected in parallel between the anode 54+ of the direct current input end and the cathode 54-of the direct current input end.
The discharge circuit comprises a voltage dependent resistor MOV1, a voltage dependent resistor MOV2 and a discharge tube G1, wherein the two voltage dependent resistors MOV1 and MOV2 are connected in series and then are connected with an input capacitor C1 and C2 in parallel, one end of the discharge tube G1 is connected with the series connection point of the two voltage dependent resistors MOV1 and MOV2, and the other end of the discharge tube G1 is grounded GND.
As shown in fig. 2, when the voltage of the negative electrode DC-of the DC output terminal is positive and the voltage of the positive electrode DC + of the DC output terminal is negative due to the differential mode lightning strike energy, most of the differential mode lightning strike energy returns to the lightning strike device through the lightning protection module LIGHTP1, and the redundant differential mode lightning strike energy returns to the lightning strike device through the diode voltage relief circuit. A small amount of differential mode lightning energy flows through the output ORING tube, residual energy is absorbed by the input capacitor, and the residual voltage of the differential mode lightning energy is clamped by the two piezoresistors of the discharge circuit.
When the equipment connected with the direct current output end is subjected to common-mode lightning strike, part of the lightning strike energy input by the direct current output end flows through the diode voltage-relief circuit and the discharge circuit to be discharged to the ground as shown in figure 3. Another part of the lightning stroke energy input by the DC output end flows through the output ORING tube and the discharge circuit to be discharged to the ground.
In the embodiment of the invention, the diode voltage relief circuit of the lightning protection circuit is connected in parallel with the lightning protection module LIGHT 1, under the differential mode lightning stroke state, the voltage of the negative electrode DC-of the direct current output end is negative, the voltage of the positive electrode DC + of the direct current output end is positive, energy firstly flows through the power output capacitors C1 and C2, is absorbed by the capacitors, and then flows through the ORING tube, so that the ORING tube cannot be damaged; when the voltage of the negative electrode DC-of the direct current output end is positive, and the voltage of the positive electrode DC + of the direct current output end is negative, energy firstly flows through the ORING tube, the residual energy is too high, and the ORING tube can be directly damaged. When common-mode lightning strikes, when the energy is the positive pole DC + of the direct current output end to the ground, the energy does not flow through the output ORING tube and does not damage the output ORING tube; when the energy is the negative electrode DC-to-ground of the direct current output end, the energy can directly flow through the ORING tube, and the lightning protection circuit of the embodiment of the invention is additionally provided with the diode pressure relief circuit to enable part of the energy to flow to the ground through the positive electrode DC + of the direct current output end, so that the ORING tube is protected.
The embodiment of the invention can be used for the lightning protection circuit of the power supply power-down circuit of the 5G communication power supply, can inhibit the 8/20 mu S10 KA impact energy and the residual energy left by the output lightning protection device, and can prevent the damage of the power supply output ORING tube. In the embodiment of the invention, four ES3J diodes and two rectifier bridges are matched with a common lightning protection module for a diode pressure relief circuit with single-path output of a 5G power supply, and 30 standard tests of output end DC + to DC-, output end DC + to ground and output end DC-to ground can be completed under 8/20 mu S10 KA differential mode impact energy, so that the problem of damage of residual energy ORING caused by lightning stroke impact is solved, a high-end lightning protection module can be avoided, and the circuit cost is reduced.
Claims (6)
1. The lightning protection circuit of the power-down circuit of the communication power supply comprises a direct-current input end, a direct-current output end and an output ORING pipe, wherein the positive pole of the direct-current input end is connected with the positive pole of the direct-current output end, and the negative pole of the direct-current input end is connected with the negative pole of the direct-current output end through the output ORING pipe; the diode pressure relief circuit comprises a plurality of diode slow tubes and a plurality of diode fast tubes, wherein the anodes of the diode slow tubes are connected with the cathodes of the direct current output ends, and the cathodes of the diode slow tubes are connected with the anodes of the direct current output ends; the anode of the diode fast tube is connected with the cathode of the direct current output end, and the cathode of the diode fast tube is connected with the anode of the direct current output end.
2. The lightning protection circuit of claim 1, wherein the diode voltage relief circuit comprises a plurality of patch bridges comprising two cathodically connected diode thyristors or two anodically connected diode thyristors.
3. The lightning protection circuit of claim 1, comprising an input capacitor and a discharge circuit, wherein the input capacitor is connected between the positive pole of the DC input terminal and the negative pole of the DC input terminal; the discharge circuit comprises two voltage dependent resistors and a discharge tube, the two voltage dependent resistors are connected in series and then connected in parallel with the input capacitor, one end of the discharge tube is connected with the series connection point of the two voltage dependent resistors, and the other end of the discharge tube is grounded.
4. The lightning protection circuit of claim 1, wherein the ORING output transistor includes a plurality of MOS transistors having sources connected to the negative terminal of the DC input terminal, drains connected to the negative terminal of the DC output terminal, and gates connected to the driving signal input terminal of the ORING output transistor.
5. The lightning protection circuit of claim 3, wherein when the differential mode lightning strike energy causes the voltage at the negative pole of the DC output terminal to be positive and the voltage at the positive pole of the DC output terminal to be negative, most of the differential mode lightning strike energy flows through the lightning protection module and returns to the lightning strike device, and a portion of the differential mode lightning strike energy flows through the diode voltage relief circuit and returns to the lightning strike device; a small amount of differential mode lightning energy flows through the output ORING tube, residual energy is absorbed by the input capacitor, and the residual voltage of the differential mode lightning energy is clamped by the two piezoresistors of the discharge circuit.
6. The lightning protection circuit of claim 3, wherein when a device connected to the DC output is subjected to a common mode lightning strike, a portion of the energy of the lightning strike input from the DC output is discharged to ground through the diode voltage relief circuit and the discharge circuit; another part of the lightning stroke energy input by the DC output end flows through the output ORING tube and the discharge circuit to be discharged to the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186229.XA CN115275958B (en) | 2022-09-28 | 2022-09-28 | Lightning protection circuit of power down circuit of communication power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186229.XA CN115275958B (en) | 2022-09-28 | 2022-09-28 | Lightning protection circuit of power down circuit of communication power supply |
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| CN115275958A CN115275958A (en) | 2022-11-01 |
| CN115275958B true CN115275958B (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211186229.XA Active CN115275958B (en) | 2022-09-28 | 2022-09-28 | Lightning protection circuit of power down circuit of communication power supply |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD264094A1 (en) * | 1987-08-20 | 1989-01-18 | Liebknecht Transformat | ARRANGEMENT FOR THE PROTECTION OF THE INPUT DEVICES OF A LOW VOLTAGE CONTROL FOR HIGH VOLTAGE CIRCUIT BREAKERS |
| EP0372673A2 (en) * | 1988-12-08 | 1990-06-13 | Nortel Networks Corporation | Telephone protection circuit |
| CN1381935A (en) * | 2001-04-16 | 2002-11-27 | 伊顿公司 | Impact protection device containing hot melt sheet spring, melt sheet pulling and hoop device |
| CN102055182A (en) * | 2010-12-07 | 2011-05-11 | 贵州永跃科技有限责任公司 | Lightening protector without ground wire |
| CN214174440U (en) * | 2021-01-05 | 2021-09-10 | 中电投新疆能源化工集团哈密有限公司 | Lightning protection ultrasonic wave anemorumbometer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8053808B2 (en) * | 2007-05-21 | 2011-11-08 | Alpha & Omega Semiconductor, Ltd. | Layouts for multiple-stage ESD protection circuits for integrating with semiconductor power device |
| CN201417941Y (en) * | 2009-06-08 | 2010-03-03 | 杭州华三通信技术有限公司 | Interface protection circuit |
| US11362083B2 (en) * | 2020-02-11 | 2022-06-14 | Semtech Corporation | TVS diode circuit with high energy dissipation and linear capacitance |
| JP7303139B2 (en) * | 2020-03-06 | 2023-07-04 | 株式会社日立製作所 | power conversion system |
| CN114583940A (en) * | 2022-05-09 | 2022-06-03 | 深圳市高斯宝电气技术有限公司 | Power-off circuit of low-voltage direct-current power supply |
-
2022
- 2022-09-28 CN CN202211186229.XA patent/CN115275958B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD264094A1 (en) * | 1987-08-20 | 1989-01-18 | Liebknecht Transformat | ARRANGEMENT FOR THE PROTECTION OF THE INPUT DEVICES OF A LOW VOLTAGE CONTROL FOR HIGH VOLTAGE CIRCUIT BREAKERS |
| EP0372673A2 (en) * | 1988-12-08 | 1990-06-13 | Nortel Networks Corporation | Telephone protection circuit |
| CN1381935A (en) * | 2001-04-16 | 2002-11-27 | 伊顿公司 | Impact protection device containing hot melt sheet spring, melt sheet pulling and hoop device |
| CN102055182A (en) * | 2010-12-07 | 2011-05-11 | 贵州永跃科技有限责任公司 | Lightening protector without ground wire |
| CN214174440U (en) * | 2021-01-05 | 2021-09-10 | 中电投新疆能源化工集团哈密有限公司 | Lightning protection ultrasonic wave anemorumbometer |
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| CN115275958A (en) | 2022-11-01 |
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