CN101159385B - Veneer power source backup method and system - Google Patents
Veneer power source backup method and system Download PDFInfo
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- CN101159385B CN101159385B CN2007101814755A CN200710181475A CN101159385B CN 101159385 B CN101159385 B CN 101159385B CN 2007101814755 A CN2007101814755 A CN 2007101814755A CN 200710181475 A CN200710181475 A CN 200710181475A CN 101159385 B CN101159385 B CN 101159385B
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- power supply
- veneer
- backup
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Abstract
The invention relates to a veneer power backup method and a system thereof. The veneer power backup method comprises the following steps. Firstly, voltage is led to the veneer through a bus; then the lead-in voltage is converted into the required low voltage through the DC/DC on the veneer; at the same time, a backup power supply is arranged and is and led to each veneer. When the veneer power supply works normally, the backup power loop is cut off. When the veneer power is ineffective, the backup power loop is shut down. The veneer power supply backup system comprises a high-low-voltage bus, a backup power supply, a DC/DC power supply and a diode D1 connected with the DC/DC power in series. The system is characterized in that it also comprises a detection switch circuit. When the veneer works normally, the detection switch circuit keeps the power backup in open-circuit state. When the veneer power is ineffective, the detection switch circuit is communicated with the backup power circuit and supplies power for the business veneer. The invention decreases the backup power supply and greatly saves cost.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of service board power supply backup method and one-board power supply standby system thereof.
Technical background
In the communications field, the uninterrupted power supply of communication system is that communication system is normal, the most basic assurance of stable operation, the Secondary Power Module that the existing communication system uses, and its MTBF is generally between 1500Khours-5000KHours.Though this Secondary Power Module has higher reliability, but for when accident occurring, what still can guarantee to power is uninterrupted, industry is design one standby system in system normally, secondary power supply is backed up, when losing efficacy, guarantee the operate as normal of system with certain (a bit) modular power source in system.
In the prior art, the common mode that power supply is protected and backed up has following several:
1) n+1 centralized power supply system: in this mode, the power panel that n+1 (n 〉=1) piece is identical is in parallel simultaneously to be used, and is system's centrally connected power supply, system power＜power panel Power x n.When any block power supply plate lost efficacy, system was by all the other n block power supply plate power supplies, and business can not be affected.But the reliability of centrally connected power supply is lower than decentralized power supply.
2) single-plate grade Hot Spare: in this mode, each veneer is directly introduced the 48V power supply, by this plate DC/DC 48V is converted to the low pressure that needs, and this plate DC/DC does 1+1 hot backup.
3) mode of decentralized power supply, centralized hot backup: in this mode, each veneer is directly introduced the 48V power supply, 48V is converted to the low pressure that needs by this plate DC/DC; Simultaneously, system provides a backup battery plate, exports and introduce each veneer, is the veneer power supply with this plate DC/DC.When the DC/DC of any veneer lost efficacy, can both be by the power supply of backup battery plate, business can not be affected.Obviously, this is a kind of improvement of mode 2, the backup battery that was positioned at service board is originally all put together, and still be 1+1 backup in essence.Because backup battery is to power for service board simultaneously with this plate power supply, be 1+1 backup in essence, so the power of backup battery must be enough to bear whole system.
Wherein the third mode is comparatively advanced backup mode, and Fig. 1 is the electric power-feeding structure figure of this kind mode.
Though above-mentioned several scheme can realize the backup of power supply, all there is following shortcoming:
1) the backup battery power ratio is bigger, and cost compares higher, and heat dissipation design is also very difficult.
2) because the electric current that passes through of low-voltage bus bar on the backboard is bigger, so, be difficult to solve the big problem of low-voltage bus bar pressure drop on the backboard, and then make and can't be applied to low pressure, big current system.
3) backup battery is also in running order at ordinary times, and load is heavier, and then has reduced the reliability of itself.
In addition, also there are following shortcoming in existing n+1 centrally connected power supply, centralized hot backup:
1) because the plate position that power panel takies is too much, reduces the configuration of service board, influenced the integrated level of system.
2) reliability of centralized power supply system is lower.
3) be difficult to solve the big problem of low-voltage bus bar pressure drop on the backboard, can't be applied to the system of low pressure, big electric current.
4) backup battery is in running order at ordinary times makes load heavier, and then has reduced the reliability of itself.
Summary of the invention
The purpose of this invention is to provide a kind of electric current that can reduce backup battery power, reduce the backboard low-voltage bus bar, allow backup battery be in the one-board power supply backup method and the one-board power supply standby system of light condition at ordinary times.
Wherein, one-board power supply backup method of the present invention adopts the decentralized power-supply mode, introduce voltage by bus earlier and give veneer, be the required operating voltage of veneer by the DC/DC power supply on the veneer with the voltage transitions of introducing again, a backup DC/DC power supply that is provided with simultaneously, in parallel with the DC/DC power supply on the veneer, at last each veneer is introduced in its output, it is characterized in that: during DC/DC power supply operate as normal on veneer, to back up the DC/DC electric power loop disconnects, when one-board power supply lost efficacy, will back up the DC/DC electric power loop and connect.
Described one-board power supply backup method, concrete steps are: dispose a detection commutation circuit that comprises sample detecting circuit and switching switch circuit on the described veneer, described sample detecting circuit carries out sample detecting to this veneer output voltage, and the output switching signal is given switching switch circuit, switching switch circuit is according to the switching of this switching signal control backup DC/DC electric power loop, that is: during normal working of single board, this detection commutation circuit makes backup DC/DC electric power loop be in open-circuit condition, when the DC/DC power-fail on the veneer, this detects commutation circuit and connects backup DC/DC electric power loop, is the veneer power supply.
Described one-board power supply backup method also is included in a storage capacitor is set on the veneer, this storage capacitor one end ground connection, and the other end connects load, in the circuit handoff procedure, is the service board power supply.
Described one-board power supply backup method when the DC/DC power-fail on the veneer, also comprises a step that reports power-fail information to system.
A kind of one-board power supply standby system, comprise the high-low pressure bus, backup DC/DC power supply that links to each other with the high-low pressure bus and veneer DC/DC power supply, the isolating diode D1 that connects with veneer DC/DC power supply, the positive pole of this diode D1 connects high potential, described backup DC/DC power supply is in parallel with veneer DC/DC power supply, it is characterized in that, comprise that is also detected a commutation circuit, one end is connected between veneer DC/DC power supply and the isolating diode D1, the other end connects low-voltage bus bar, during normal working of single board, this detection commutation circuit makes the power supply backup plate be in open-circuit condition, when veneer DC/DC power-fail, this detects commutation circuit and connects backup DC/DC electric power loop, is the veneer power supply.
Described detection commutation circuit, comprise switching switch circuit, sample detecting circuit, wherein, described switching switch circuit one end is connected in low-voltage bus bar, the other end is connected in the negative pole of isolating diode D1, described sample detecting circuit input end is connected between veneer DC/DC power supply and the isolating diode D1, and output is connected in the input of switching switch circuit.
Described switching switch circuit comprises metal-oxide-semiconductor Q4, resistance R 2 and the diode D4 that is connected in parallel, and the negative pole of diode D4 connects the source electrode of metal-oxide-semiconductor Q4, and the drain electrode of described metal-oxide-semiconductor Q4 connects low-voltage bus bar, and gate pole receives the control signal of sample detecting circuit input.
Described sample detecting circuit comprises resistance R 12 and the R13 that is connected in series, wherein, the end of R13 is connected the positive pole of isolating diode D1, the other end is connected in the input of a detection chip, the output of detection chip is connected in the gate pole of metal-oxide-semiconductor Q4, finish detection to veneer DC/DC electric power output voltage, and when output voltage is unusual output drive signal, open switching switch circuit.
Described one-board power supply standby system, also comprise a soft-start circuit, described soft-start circuit is connected between low-voltage bus bar and the switching switch circuit, comprise the resistance R 6 and the R7 that are connected in series, the capacitor C 1, diode D3 and the metal-oxide-semiconductor Q3 that are connected in parallel with R6, wherein, the drain electrode of this metal-oxide-semiconductor Q3 links to each other with the drain electrode of metal-oxide-semiconductor Q4.
Described detection commutation circuit also comprises a storage capacitor C, and this storage capacitor C one end connects load, and other end ground connection is used for powering to the load in handoff procedure.
By single board backup method of the present invention and single board standby system, make that the power configuration of backup battery is flexible, the power of backup battery descends, saved cost in a large number, while is owing to the line drop that has reduced backup battery, and when operate as normal, backup battery is in light condition substantially, temperature rise is lower, and reliability improves relatively.
Description of drawings
Fig. 1 is decentralized power supply, centralized hot backup electric power-feeding structure block diagram;
Fig. 2 is the power supply cold standby electric power-feeding structure figure of system of the present invention;
Fig. 3 is a circuit diagram of the embodiment of the invention.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
As shown in Figure 2, the present invention has designed a kind of novel one-board power supply standby system, the part identical with one-board power supply standby system of the prior art is the high-low pressure bus, backup DC/DC power supply, veneer DC/DC power supply, diode, the high potential of this diode cathode connected system, power input when this bus is used to provide system's operate as normal, this backup DC/DC power supply is in parallel with veneer DC/DC power supply, the same during work with DC/DC power supply on the veneer, be used for changing the direct voltage of high-low pressure bus input into direct voltage that veneer needs, such as may bus providing voltage is 48 volts, and the operating voltage that needs during the veneer operation is 5 volts, and this DC/DC can be 5 volts operating voltage with these 48 volts of voltage transitions.
The present invention is on above-mentioned former standby system basis, increase by one and detected commutation circuit, this detection commutation circuit guarantees to disconnect the loop of backup DC/DC power supply when normal working of single board, make the veneer power supply finish by veneer DC/DC power supply, when veneer DC/DC power supply goes wrong and can not normal power supply, DC/DC power supply power supply by the power supply backup plate guarantees normal working of single board.
As shown in Figure 3, this detection commutation circuit comprises: switching switch circuit, sample detecting circuit and soft-start circuit.
This sample detecting circuit comprises a sample circuit and a detection chip, this detection chip can have multiple, comparator with a reference source can adopt in the present invention, such as the detection chip of the model of using in the present embodiment as MC33161, this sample circuit comprises resistance R 12 and the R13 that is connected in series, and wherein the end of R13 is connected the positive pole of diode D1, and the other end is connected in the input of detection chip, be 3 pin in the present embodiment, the other end ground connection of R12.Output 5 pin of detection chip are connected the gate pole of metal-oxide-semiconductor Q4, when circuit working, a threshold value is set earlier, this plate output voltage is sampled, and deliver to 3 pin of detection chip by sample circuit, when output is lower than preset threshold, 5 pin of detection chip are reversed to low level by high level, finish detection, and the output switching signal, give switching switch circuit, connect backup battery.
This switching switch circuit comprises metal-oxide-semiconductor Q4, diode D1 and the resistance R 2 that is connected in parallel, and the negative pole of diode D4 connects the source electrode of metal-oxide-semiconductor Q4.At the gate pole of Q4, can connect a current-limiting resistance R3 again.5 pin of the drain electrode joint detection chip of Q4, the i.e. output of testing circuit.
Also comprise a soft-start circuit, this soft-start circuit is connected between low-voltage bus bar and the switching switch circuit, comprises the resistance R 6 and the R7 that are connected in series, the capacitor C 1, diode D3 and the metal-oxide-semiconductor Q3 that are connected in parallel with R6, wherein, the drain electrode of this metal-oxide-semiconductor Q3 links to each other with the drain electrode of metal-oxide-semiconductor Q4.This soft-start circuit control metal-oxide-semiconductor Q3 slowly opens, and strikes sparks when avoiding the veneer hot plug.
Metal-oxide-semiconductor Q3 and Q4 can use the metal-oxide-semiconductor of P raceway groove, low pressure drop among the present invention, and gate pole ground connection is got final product.
In the present invention, use metal-oxide-semiconductor Q3 is relative with Q4, under the situation of not using diode, reached the purpose with backup battery and this plate isolated from power, this is the key point place.
In order to guarantee that veneer can not have the switching of meeting, a storage capacitor C also is set on this veneer, this capacitor C one end is connected in the negative pole of diode D1, other end ground connection.In the process of switching, C powers to veneer by storage capacitor.
One-board power supply backup method of the present invention, adopt the decentralized power-supply mode, introduce voltage by bus and give veneer, and then the voltage transitions of bus being introduced by the DC/DC on the veneer is the required low pressure of veneer, and a backup battery plate is set simultaneously, and each veneer is introduced in its output, when the one-board power supply operate as normal, the backup battery loop is disconnected, when one-board power supply lost efficacy, backup battery is changed to closed circuit.
The present invention disposes one and detects commutation circuit on each veneer, during normal working of single board, this detection commutation circuit makes the power supply backup plate be in open-circuit condition, and when one-board power supply lost efficacy, this detected commutation circuit and connects the backup battery loop, is the service board power supply.
The present invention also is provided with a storage capacitor on veneer, this storage capacitor is the veneer power supply when circuit switches.
When the power-fail of service board, also comprise a step to system's reporting information.The fault that veneer was lost efficacy reports system, like this, can race against time as soon as possible and finish the repair of trouble power ground, avoids backup battery long service time, reduces the system safety coefficient.
Application by one-board power supply standby system of the present invention and backup method, make backup battery power configuration flexibly, the power of backup battery descends, saved cost in a large number, reduced the line drop of backup battery simultaneously, and when operate as normal, backup battery is in light condition substantially, and temperature rise is lower, and reliability improves relatively.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (4)
1. one-board power supply standby system, comprise the high-low pressure bus, backup DC/DC power supply that links to each other with the high-low pressure bus and veneer DC/DC power supply, the isolating diode D1 that connects with veneer DC/DC power supply, the positive pole of this diode D1 connects high potential, described backup DC/DC power supply is in parallel with veneer DC/DC power supply, it is characterized in that, comprise that is also detected a commutation circuit, one end is connected between veneer DC/DC power supply and the isolating diode D1, the other end connects low-voltage bus bar, during normal working of single board, this detection commutation circuit makes the power supply backup plate be in open-circuit condition, when veneer DC/DC power-fail, this detects commutation circuit and connects backup DC/DC electric power loop, is the veneer power supply;
Wherein, described detection commutation circuit comprises switching switch circuit, sample detecting circuit, described switching switch circuit one end is connected in low-voltage bus bar, the other end is connected in the negative pole of isolating diode D1, described sample detecting circuit input end is connected between veneer DC/DC power supply and the isolating diode D1, and output is connected in the input of switching switch circuit; Described switching switch circuit comprises metal-oxide-semiconductor Q4, resistance R 2 and the diode D4 of connection parallel with one another, and the negative pole of diode D4 connects the source electrode of metal-oxide-semiconductor Q4, and the drain electrode of described metal-oxide-semiconductor Q4 connects low-voltage bus bar, and gate pole receives the control signal of sample detecting circuit input.
2. one-board power supply standby system as claimed in claim 1, it is characterized in that described sample detecting circuit comprises resistance R 12 and the R13 that is connected in series, wherein, the end of R13 is connected the positive pole of isolating diode D1, the other end is connected in the input of a detection chip, and the output of detection chip is connected in the gate pole of metal-oxide-semiconductor Q4, finishes the detection to veneer DC/DC electric power output voltage, and when output voltage is unusual output drive signal, open switching switch circuit.
3. one-board power supply standby system as claimed in claim 1, it is characterized in that also comprising a soft-start circuit, described soft-start circuit is connected between low-voltage bus bar and the switching switch circuit, comprise the resistance R 6 and the R7 that are connected in series, the capacitor C 1, diode D3 and the metal-oxide-semiconductor Q3 that are connected in parallel with R6, wherein, the drain electrode of this metal-oxide-semiconductor Q3 links to each other with the drain electrode of metal-oxide-semiconductor Q4.
4. want each described one-board power supply standby system of 1-3 as right, it is characterized in that described detection commutation circuit also comprises a storage capacitor C, this storage capacitor C one end connects load, and other end ground connection is used for powering to the load in handoff procedure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021259216A CN100377469C (en) | 2002-08-02 | 2002-08-02 | Single-deck power supply backup method and backup system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021259216A Division CN100377469C (en) | 2002-08-02 | 2002-08-02 | Single-deck power supply backup method and backup system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101159385A CN101159385A (en) | 2008-04-09 |
| CN101159385B true CN101159385B (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101814755A Expired - Fee Related CN101159385B (en) | 2002-08-02 | 2002-08-02 | Veneer power source backup method and system |
| CNB021259216A Expired - Lifetime CN100377469C (en) | 2002-08-02 | 2002-08-02 | Single-deck power supply backup method and backup system |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021259216A Expired - Lifetime CN100377469C (en) | 2002-08-02 | 2002-08-02 | Single-deck power supply backup method and backup system |
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| CN (2) | CN101159385B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159385B (en) * | 2002-08-02 | 2010-12-22 | 华为技术有限公司 | Veneer power source backup method and system |
| CN1331293C (en) * | 2004-03-31 | 2007-08-08 | 华为技术有限公司 | Single-plate power-supply system |
| CN100390686C (en) * | 2004-04-21 | 2008-05-28 | 华为技术有限公司 | System for identifying single board redundant power supply |
| CN1979999B (en) * | 2005-11-29 | 2011-03-30 | 上海贝岭股份有限公司 | High-voltage/low-voltage power supply switching-over circuit |
| CN100426193C (en) | 2006-05-19 | 2008-10-15 | 华为技术有限公司 | Single-board power construction and power supply |
| CN101459531B (en) * | 2007-12-11 | 2011-06-22 | 英业达股份有限公司 | Electricity supply device and method for substrate management controller |
| CN101764425B (en) * | 2009-12-30 | 2011-11-09 | 福建星网锐捷网络有限公司 | Single plate power backup circuit and single plate power system |
| CN101777790B (en) * | 2009-12-30 | 2011-11-16 | 北京宇航系统工程研究所 | Reliable power supply circuit of triple redundancy embedded computer system |
| CN103066574A (en) * | 2012-12-17 | 2013-04-24 | 浪潮电子信息产业股份有限公司 | Over-voltage protection (OVP) protection line of multiple groups of voltage |
| CN103143813B (en) * | 2013-02-21 | 2016-06-15 | 郭少枝 | A kind of inversion module equipment with fallback circuit |
| CN104319870B (en) * | 2014-09-22 | 2017-02-15 | 邦彦技术股份有限公司 | Power supply system supporting redundancy backup and hot plug |
| CN106532917B (en) * | 2016-12-08 | 2019-01-15 | 北京卫星制造厂 | A kind of highly reliable output isolation control circuit of master backup power supply |
| CN106601184B (en) * | 2016-12-21 | 2019-04-05 | 深圳市奥拓电子股份有限公司 | A kind of LED display and its power redundancy backup method and device |
| CN107273631A (en) * | 2017-06-28 | 2017-10-20 | 济南浪潮高新科技投资发展有限公司 | A kind of design method of Auto-Sensing hard disk voltage and auto switching electric source passage |
| CN109428384A (en) * | 2017-08-25 | 2019-03-05 | 上海华为技术有限公司 | A kind of backup power supply system of AC power supply device, circuit board and standby method for electrically |
| CN114301153A (en) * | 2020-09-22 | 2022-04-08 | 西安诺瓦星云科技股份有限公司 | Power supply backup control circuit card and LED display control system |
| CN111965515B (en) * | 2020-10-21 | 2021-01-19 | 深圳市永联科技股份有限公司 | Method for identifying fault of reverse-filling prevention diode |
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- 2002-08-02 CN CNB021259216A patent/CN100377469C/en not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1472863A (en) | 2004-02-04 |
| CN100377469C (en) | 2008-03-26 |
| CN101159385A (en) | 2008-04-09 |
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