CN101697413B - Protective device of direct current power supple for communication equipment - Google Patents
Protective device of direct current power supple for communication equipment Download PDFInfo
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- CN101697413B CN101697413B CN2009102111493A CN200910211149A CN101697413B CN 101697413 B CN101697413 B CN 101697413B CN 2009102111493 A CN2009102111493 A CN 2009102111493A CN 200910211149 A CN200910211149 A CN 200910211149A CN 101697413 B CN101697413 B CN 101697413B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 31
- 238000004891 communication Methods 0.000 title claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000005669 field effect Effects 0.000 claims description 13
- 230000001012 protector Effects 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 9
- 101100355601 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RAD53 gene Proteins 0.000 claims description 7
- 101150087667 spk1 gene Proteins 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 208000025274 Lightning injury Diseases 0.000 abstract 1
- 230000009191 jumping Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 3
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Abstract
The invention relates to a protective device of direct current power supple for communication equipment and belongs to the technical field of direct current power supply. The protective device comprises a lightning strike protection module, an over/under-voltage protection module, a wave filtering module and a DC-DC power supply module, wherein the lightning strike protection module comprises a primary protection unit, a display unit, a secondary protection unit and a protective tube FU2; the wave filtering module comprises a low-frequency wave filtering unit, a high-low frequency decoupling unit and a high-frequency wave filtering unit. In the invention, a comprehensive protection method based on the cooperation of the three modules, i.e., a reasonable design between two stages of lightning protection in which the first stage of lightning protection is used for aerial drainage and the second stage of lightning protection is used for clamping, is adopted to drain amplified lightning stroke current and to ensure a lower residual voltage value; the over/under-voltage protection of the control of a power supply management module on the power supply module is adopted to prevent the influence from input voltage jumping; meanwhile; the wave filtering mode combining the low-frequency filtered wave and the high-frequency filtered wave is adopted to effectively solve the problems of protection from lightning stoke damage in the direct current power supply for the communication equipment and high-low frequency interference.
Description
Technical field
The present invention relates to a kind of DC power supply technical field, particularly relate to the protector of a kind of communication apparatus with DC power supply.
Background technology
Along with development of science and technology, communication system equipment performance more and more higher, environment for use becomes increasingly complex, so communication equipment is also more and more higher to the requirement of power supply.At present, the DC power supply of part communication equipment does not adopt comprehensive protecting method design, this not only can make communication equipment indescribable deadlock occur, soft faults such as fluctuation of service, and equipment generally is difficult to by the Electro Magnetic Compatibility test, and the limit of disturbance of stipulating among the conduction interference immunity standard limit value of the radiofrequency field induction of stipulating among surge (impacts) immunity to interference that particularly can not be by stipulating among the GB/T 17626.5-2008, the GB/T 17626.6-2008 and the GB9254-2008 is tested; Bring problems for the electromagnetic compatibility authentication of product; Simultaneously, the phenomenon of thunderbolt damage equipment power supply takes place often.
Summary of the invention
Technical problem to be solved by this invention is to solve the protector anti-lightning strike ability and the problem that resist multiple electromagnetic interference (EMI) ability of communication apparatus with DC power supply.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides the protector of a kind of communication apparatus with DC power supply, adopts comprehensive protecting method to solve thunderbolt and the electromagnetic interference problem of communication apparatus with the protector of DC power supply.This protector comprises lightning Protection module, overvoltage/undervoltage protection module, filtration module and DC-DC power module.
Described lightning Protection module comprises elementary protective unit, display unit, secondary protective unit and protective tube FU2, and elementary protective unit comprises first, second, third 3 piezo-resistance MOV
1, MOV
2, MOV
3, the first piezo-resistance MOV
1With the 0V that is connected direct current after protective tube FU2 is connected in series and-the 48V output line on, the first piezo-resistance MOV
1Simultaneously with the 3rd piezo-resistance MOV
3Be connected to the earth connection PE of DC power supply after the serial connection, the second piezo-resistance MOV
2Be connected between the 0V output line and earth connection PE of DC power supply;
Secondary protective unit comprises the 4th, the 5th, the 63 piezo-resistance MOV
4, MOV
5, MOV
6, the 4th piezo-resistance MOV
4Be connected DC power supply 0V and-the 48V output line between, the 5th piezo-resistance MOV
5Be connected between the 0V output line and PE earth connection of DC power supply the 6th piezo-resistance MOV
6Be connected DC power supply-48V output line and PE earth connection between; The first piezo-resistance MOV
1With the 4th piezo-resistance MOV
4Input between be connected with first inductance L 1, the output of protective tube FU2 and the 4th piezo-resistance MOV
4Input between be connected with second inductance L 2;
The pin 1 of optocoupler 4N35 is connected to the 0V output of DC power supply through first resistance R 1 in the display unit, pin 2 through the first indicator light LED1 and FU2 be connected to power supply-48V output; Pin 4 through second resistance R 2 be connected to DC power supply-48V output, the 0V output of pin 5 and DC power supply links to each other and is connected with the other end of second resistance R 2 through the second indicator light LED2, the two ends of first capacitor C 1 are connected between the input of the optocoupler 4N35 pin 5 and the second indicator light LED2 after connecting pin 1, the second capacitor C 2 of the output of the first indicator light LED1 and optocoupler 4N35 and buzzer SPK1 parallel connection respectively;
Described overvoltage/undervoltage protection module comprises power management chip, the pin V of this power management chip
EEWith pin V
DDBe connected to respectively DC power supply-48V and 0V output, pin 0V is provided with overvoltage sampling divider resistance R5, pin UV is provided with under-voltage sampling divider resistance R3, pin SENSE and pin V
EEBetween be provided with the 8th resistance R 8, pin PWRGD connects the pin 2 of the second optocoupler 4N25, pin DRAIN is connected to the drain electrode of field effect transistor Q1 through the 5th capacitor C 5, this pin also is connected in series the grid that the other end that is connected GATE pin and the 7th resistance R 7, the seven resistance R 7 after the 4th capacitor C 4 and the 6th resistance R 6 simultaneously is connected to field effect transistor Q1; The pin 1 of the second optocoupler 4N25 is exported through the 0V that the 9th resistance R 9 connects DC power supply, is connected to the Vin of DC/DC module after pin 5 connects the ON/OFF enable pin of DC/DC module and is connected in series the 8th capacitor C 8
-, pin 4 meets the Vin of DC/DC module
-The source electrode of field effect transistor Q1 is connected to the SENSE pin of power management chip, and grid is connected to the GATE pin of power management chip through the 7th resistance R 7;
Described filtration module comprises low frequency filtering unit, low-and high-frequency decoupling unit and High frequency filter unit, and the low frequency filtering unit is used for suppressing the low-frequency disturbance of 0.15～30MHz of carrying from overvoltage/undervoltage protection module output current; The high and low frequency that low-and high-frequency decoupling unit is used for removing low frequency filtering unit output current disturbs, and the High frequency filter unit is used for suppressing the High-frequency Interference of 30～500MHz of carrying from low frequency filtering unit output current.
In the such scheme, described low frequency filtering unit is the EMI low-frequency filter, the Vin of this EMI low-frequency filter
+And Vin
-Input is connected to the 0V output of DC power supply and the drain electrode of field effect transistor Q1 respectively, and the Vin of described EMI low-frequency filter
+And Vin
-Be connected with the 5th capacitor C 5 between the input, low-and high-frequency decoupling unit is composed in parallel by high frequency decoupling capacitor and low frequency decoupling capacitor, and the High frequency filter unit is made up of two ferrite filters, is connected to low-and high-frequency decoupling unit output end vo ut
+, Vout
-With DC/DC module input Vin
+, Vin
-Connection line on.
The comprehensive protecting method that the present invention adopts three modules to work in coordination, promptly by the appropriate design between the two-stage lightning protection, first order lightning protection is used for earial drainage, and second level lightning protection is used for clamp, the big thunder-strike current but also can guarantee to hang down the residual voltage value of so not only can having released; The overvoltage/undervoltage protection of adopting power management module that power module is controlled prevents the influence of input voltage transition; The filtering mode of taking low frequency filtering to combine with High frequency filter simultaneously effectively solves the low-and high-frequency interference problem of power supply.
Description of drawings
Fig. 1 is the protector structured flowchart of communication apparatus of the present invention with DC power supply;
Fig. 2 is a kind of specific embodiment circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is made detailed explanation.
As shown in Figure 1 and Figure 2; communication apparatus with DC power supply have 0V ,-48V and three outputs of PE (earth connection); this protector is connected on the output of this DC power supply; be used for this DC power supply is carried out integrated protection, this protector comprises lightning Protection module, overvoltage/undervoltage protection module, filtration module and DC/DC module.
The lightning Protection module comprises elementary protective unit, display unit, secondary protective unit and protective tube FU2, and primary unit is used for earial drainage, and the jumbo thunder-strike current of releasing is by first, second, third 3 piezo-resistance MOV
1, MOV
2, MOV
3Constitute, wherein the first piezo-resistance MOV
1With the 0V that is connected DC power supply after protective tube FU2 is connected in series and-the 48V output line on, the first piezo-resistance MOV
1Simultaneously with the 3rd piezo-resistance MOV
3Be connected to the earth connection PE of DC power supply after the serial connection, the second piezo-resistance MOV
2Be connected between the 0V output line and earth connection PE of DC power supply; Four, the 5th, the 63 piezo-resistance MOV
4, MOV
5, MOV
6Constitute secondary protective unit, secondary protective unit is used for voltage clamp, and the residual voltage that is about to thunderbolt is clamped on the lower level, and the voltage of direct current supply is not had influence.The 4th piezo-resistance MOV wherein
4Be connected DC power supply 0V and-the 48V output line between, the 5th piezo-resistance MOV
5Be connected between the 0V output line and PE earth connection of DC power supply the 6th piezo-resistance MOV
6Be connected DC power supply-48V output line and PE earth connection between; The first piezo-resistance MOV
1With the 4th piezo-resistance MOV
4Input between be connected with first inductance L 1, the output of protective tube FU2 and the 4th piezo-resistance MOV
4Input between be connected with second inductance L 2;
Display unit provides work and alarm Presentation Function, and the pin 1 of the optocoupler 4N35 in the display unit is connected to the 0V output of DC power supply through first resistance R 1, pin 2 through the first indicator light LED1 and FU2 be connected to power supply-48V output; Pin 4 through second resistance R 2 be connected to DC power supply-48V output, the 0V output of pin 5 and DC power supply links to each other and is connected with the other end of second resistance R 2 through the second indicator light LED2, the two ends of first capacitor C 1 are connected between the input of the optocoupler 4N35 pin 5 and the second indicator light LED2 after connecting pin 1, the second capacitor C 2 of the output of the first indicator light LED1 and optocoupler 4N35 and buzzer SPK1 parallel connection respectively.
The two-stage protective unit can protect the thunder-strike current of 5kA 8/20 μ s, is provided with the alarm display unit simultaneously, and the running status of this protector is effectively monitored.
During operate as normal, on the pin 1 of the output of DC power supply through being added in the first optocoupler 4N35 after the R1 current limliting, the size of choose reasonable R1, can make the LED1 conducting luminous, voltage between the pin 4 and 5 is placed in the state less than 1 volt at this moment, the pin 5 output low voltages of optocoupler 4N35, this voltage is lower than the conducting voltage of LED2 and SPK1, so LED2 does not work and not buzzing of SPK1 alarm; When the excessive damage protective tube of thunder-strike current FU2, the loop at LED1 place disconnects, so LED1 extinguishes, at this moment, the circuit decision that voltage between the pin 4 and 5 is made up of LED2, SPK1 and R2, the size of choose reasonable R2 can allow the pin 5 of the first optocoupler 4N35 export high voltages, make the LED2 conducting luminous, and buzzer SPK1 energising alarm.
Described overvoltage/undervoltage protection module comprises overvoltage protective unit and under-voltage protective unit; can make up and finish overvoltage protection and under-voltage protection function; output voltage is controlled between 37～71V; when overtension; the work of overvoltage protection circuit, the DC/DC power module quits work, when voltage is too low; under-voltage protection circuit can lock circuit, and the DC/DC power module quits work.The pin V of power management chip MAX5921 in the overvoltage/undervoltage protection module
EEWith pin V
DDBe connected to respectively DC power supply-48V and 0V output, pin UV is connected to the 0V output of DC power supply through under-voltage sampling divider resistance R3, pin 0V through overvoltage sampling divider resistance R5 be connected to DC power supply-48V output, be connected with the 4th resistance R 4 between resistance R 4 and the R5, pin SENSE and pin V
EEBetween be provided with the 8th resistance R 8, pin PWRGD connects the pin 2 of the second optocoupler 4N25, pin DRAIN is connected to the drain electrode of field effect transistor Q1 through the 5th capacitor C 5, this pin also is connected in series the grid that the other end that is connected GATE pin and the 7th resistance R 7, the seven resistance R 7 after the 4th capacitor C 4 and the 6th resistance R 6 simultaneously is connected to field effect transistor Q1; The pin 1 of the second optocoupler 4N25 is exported through the 0V that the 9th resistance R 9 (current-limiting resistance) connects DC power supply, is connected to the Vin of DC/DC module after pin 5 connects the ON/OFF enable pin of DC/DC module and is connected in series the 8th capacitor C 8
-, pin 4 meets the Vin of DC/DC module
-The source electrode of field effect transistor Q1 is connected to the SENSE pin of power management chip, and grid is connected to the GATE pin of power management chip through the 7th resistance R 7.
R3 is under-voltage sampling divider resistance, when the UV of power management chip MAX5921 pin (pin 3) during than the low 1.223V of the lower limit of power supply thresholding (by height to low transition), will detect under-voltage condition; R4 is the divider resistance of under-voltage and overvoltage sampling, and R5 is an overvoltage sampling divider resistance, when the OV of power management chip MAX5921 pin (pin 2) during than the high 1.223V of higher limit of power supply thresholding (transition from low to high), will detect overvoltage condition; R8 is for detecting resistance; when the voltage at these resistance R 8 two ends surpasses 50mV; can realize that load current regulates by draw electric current from GATE end, electronic circuit breaker (MAX5921 is integrated electronic circuit breaker, so that at load current protective circuit under the excessive and short-circuit conditions) will saltus step.
The effect of MAX5921 is by load current limit to a lsafety level being prevented the influence of input voltage transition, need not to cut off electric; Utilize UV and OV pin to detect under-voltage and overvoltage fault, UV is connected with the internal simulation comparator respectively with the OV pin, the comparator hysteresis is respectively 130mV (UV) and 50mV (OV), when the UV pin voltage is reduced to respective threshold or OV voltage when rising to respective threshold, cause that the GATE end drags down, and GATE will uprise at the UV pin, before the OV pin step-down, continue to keep low level before promptly input supply voltage reaches in the specified scope.MAX5921 has the internal lock function, and regardless of the input of UV pin, outside field effect transistor Q1 will keep off-state always, exceeds 15.4V up to the input power source voltage.
Voltage on the DRAIN of power management chip MAX5921 pin (pin 1) is greater than V
PGDuring the higher limit of (power supply thresholding); the PWRGD pin becomes high-impedance state; no current flows through between the pin 1 and 2 of the second optocoupler 4N25; so form high potential difference between pin 5 and 4; this moment, the startup pin ON/OFF of DC/DC power module was a high level; DC/DC power module PEQ100-48S is quit work, realize overvoltage protection.Voltage on the DRAIN pin drops to V
PGHigher limit when following, PWRGD pin absorption current, so have electric current to flow through in the pin 1 and 2 of the second optocoupler 4N25, thereby form low potential difference between pin 5 and 4, this moment, the startup pin ON/OFF of DC/DC power module was a low level, DC/DC power module PEQ100-48S starts working, normal output current.
Filtration module comprises low frequency filtering unit, low-and high-frequency decoupling unit and High frequency filter unit; the low frequency filtering unit is an EMI low-frequency filter; be used for suppressing the low-frequency disturbance of 0.15～30MHz of carrying from overvoltage/undervoltage protection module output current, the Vin of this EMI low-frequency filter
+And Vin
-Input is connected to the 0V output of DC power supply and the drain electrode of field effect transistor Q1 respectively, and the Vin of described EMI low-frequency filter
+And Vin
-Be connected with the 5th capacitor C 5 between the input; Low-and high-frequency decoupling unit is used for removing the high and low frequency interference of low frequency filtering unit output current, is composed in parallel by high frequency decoupling capacitor C6 and low frequency decoupling capacitor C7, and the effect of C6 is the high frequency decoupling, and the effect of C7 is the low frequency decoupling; The High frequency filter unit is used for suppressing the High-frequency Interference of 30～500MHz of carrying from low frequency filtering unit output current, is made up of two ferrite filters, is connected to low-and high-frequency decoupling unit output end vo ut
+, Vout
-With DC/DC module input Vin
+, Vin
-Connection line on.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (2)
1. communication apparatus comprises lightning Protection module, overvoltage/undervoltage protection module, filtration module and DC-DC power module with the protector of DC power supply, it is characterized in that:
Described lightning Protection module comprises elementary protective unit, display unit, secondary protective unit and protective tube FU2, and elementary protective unit comprises first, second, third 3 piezo-resistance MOV
1, MOV
2, MOV
3, the first piezo-resistance MOV
1With the 0V that is connected DC power supply after protective tube FU2 is connected in series and-the 48V output line on, the first piezo-resistance MOV
1Simultaneously with the 3rd piezo-resistance MOV
3Be connected to the earth connection PE of DC power supply after the serial connection, the second piezo-resistance MOV
2Be connected between the 0V output line and earth connection PE of DC power supply;
Secondary protective unit comprises the 4th, the 5th, the 63 piezo-resistance MOV
4, MOV
5, MOV
6, the 4th piezo-resistance MOV
4Be connected DC power supply 0V and-the 48V output line between, the 5th piezo-resistance MOV
5Be connected between the 0V output line and earth connection PE of DC power supply the 6th piezo-resistance MOV
6Be connected DC power supply-48V output line and earth connection PE between; The first piezo-resistance MOV
1With the 4th piezo-resistance MOV
4Input between be connected with first inductance L 1, the output of protective tube FU2 and the 4th piezo-resistance MOV
4Input between be connected with second inductance L 2;
The pin 1 of optocoupler 4N35 is connected to the 0V output of DC power supply through first resistance R 1 in the display unit, pin 2 through the first indicator light LED1 and protective tube FU2 be connected to power supply-48V output; Pin 4 through second resistance R 2 be connected to DC power supply-48V output, the 0V output of pin 5 and DC power supply links to each other and is connected with the other end of second resistance R 2 through the second indicator light LED2, the two ends of first capacitor C 1 are connected between the input of the optocoupler 4N35 pin 5 and the second indicator light LED2 after connecting pin 1, the second capacitor C 2 of the output of the first indicator light LED1 and optocoupler 4N35 and buzzer SPK1 parallel connection respectively;
Described overvoltage/undervoltage protection module comprises power management chip, the pin V of this power management chip
EEWith pin V
DDBe connected to respectively DC power supply-48V and 0V output, be connected to overvoltage sampling divider resistance R5 on the pin 0V, be connected to under-voltage sampling divider resistance R3, pin SENSE and pin V on the pin UV
EEBetween be provided with the 8th resistance R 8, pin
Connect the pin 2 of the second optocoupler 4N25, pin DRAIN is connected to the drain electrode of field effect transistor Q1 through the 5th capacitor C 5, this pin DRAIN also is connected in series the grid that the other end that is connected GATE pin and the 7th resistance R 7, the seven resistance R 7 after the 4th capacitor C 4 and the 6th resistance R 6 simultaneously is connected to field effect transistor Q1; The pin 1 of the second optocoupler 4N25 is exported through the 0V that the 9th resistance R 9 connects DC power supply, is connected to the Vin of DC/DC module after pin 5 connects the ON/OFF enable pin of DC/DC module and is connected in series the 8th capacitor C 8
-, pin 4 meets the Vin of DC/DC module
-The source electrode of field effect transistor Q1 is connected to the SENSE pin of power management chip, and grid is connected to the GATE pin of power management chip through the 7th resistance R 7;
Described filtration module comprises low frequency filtering unit, low-and high-frequency decoupling unit and High frequency filter unit, and the low frequency filtering unit is used for suppressing the low-frequency disturbance of 0.15～30MHz of carrying from overvoltage/undervoltage protection module output current; The high and low frequency that low-and high-frequency decoupling unit is used for removing low frequency filtering unit output current disturbs, and the High frequency filter unit is used for suppressing the High-frequency Interference of 30～500MHz of carrying from low frequency filtering unit output current;
The model of described power management chip is MAX5921.
2. communication apparatus as claimed in claim 1 is characterized in that described low frequency filtering unit is the EMI low-frequency filter, the Vin of this EMI low-frequency filter with the protector of DC power supply
+And Vin
-Input is connected to the 0V output of DC power supply and the drain electrode of field effect transistor Q1 respectively, and the Vin of described EMI low-frequency filter
+And Vin
-Be connected with the 5th capacitor C 5 between the input, low-and high-frequency decoupling unit is composed in parallel by high frequency decoupling capacitor and low frequency decoupling capacitor, the High frequency filter unit is made up of two ferrite filters, and one of them ferrite filter connects low-and high-frequency decoupling unit output end vo ut
+With DC/DC module input Vin
+Another ferrite filter connects low-and high-frequency decoupling unit output end vo ut
-With DC/DC module input Vin
-
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102111493A CN101697413B (en) | 2009-11-06 | 2009-11-06 | Protective device of direct current power supple for communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102111493A CN101697413B (en) | 2009-11-06 | 2009-11-06 | Protective device of direct current power supple for communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101697413A CN101697413A (en) | 2010-04-21 |
| CN101697413B true CN101697413B (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102111493A Expired - Fee Related CN101697413B (en) | 2009-11-06 | 2009-11-06 | Protective device of direct current power supple for communication equipment |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279371B (en) * | 2011-05-11 | 2013-06-19 | 烽火通信科技股份有限公司 | Main power supply panel and spare power supply panel voltage fault detecting system for communication equipment |
| CN103078290B (en) * | 2013-01-23 | 2015-05-20 | 迈普通信技术股份有限公司 | Method and apparatus for undervoltage protection of service board card |
| CN104578038B (en) * | 2015-01-30 | 2018-01-02 | 国家电网公司 | Real-time voltage monitoring, over-pressure safety device and method for communication chip |
| CN107528540A (en) * | 2017-03-09 | 2017-12-29 | 浙江省能源与核技术应用研究院 | Photovoltaic array on-Line Monitor Device and method |
| CN107525974A (en) * | 2017-09-06 | 2017-12-29 | 武汉旗云高科工程技术有限公司 | A kind of Lightning Warning method and speed antenna integral type electric field change measuring instrument |
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