CN204131213U - A kind of circuit realizing communication equipment main power supply and take over seamlessly - Google Patents
A kind of circuit realizing communication equipment main power supply and take over seamlessly Download PDFInfo
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- CN204131213U CN204131213U CN201420433962.1U CN201420433962U CN204131213U CN 204131213 U CN204131213 U CN 204131213U CN 201420433962 U CN201420433962 U CN 201420433962U CN 204131213 U CN204131213 U CN 204131213U
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- circuit
- relay
- main power
- power supply
- communication equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model provides a kind of circuit realizing communication equipment main power supply and take over seamlessly, and this circuit comprises: an AC/DC power module, and its input termination main power source exchanges input, its output contact relay normally opened contact; Back-up source direct current input contact relay normally-closed contact, relay contact connects processor main board through switch and protective circuit, also comprise a control switching circuit, its input termination AC/DC power module output, described control switching circuit exports termination electronic switch controling end; One end ground connection of described electronic switch, one end of relay coil described in another termination, another termination AC/DC power module output of described relay coil.The utility model, by increase by control switching circuit, makes relay start decline stage early cut-off relay coil loop current at voltage, reaches quick release relay contact, thus realize the object of fast and smooth handoff.
Description
Technical field
The utility model relates to wireless communication technology field, particularly relates to a kind of circuit realizing communication equipment main power supply and take over seamlessly.
Background technology
In the application of specialty wireless communication network, a large amount of intermediate station or base station communication apparatus of using is expanded the coverage area.In the application of specialty, generally all need to provide back-up source to these professional equipments, to ensure that the normal operation of communication system provides continual communication service.Main power source adopts AC power usually, and back-up source adopts DC UPS or storage battery usually.Back-up source is generally as interim Emergency use, and equipment use ac main power is main under normal circumstances, when main power source power down, is temporarily switched to back-up source; After main power source recovers, will disconnect back-up source in time, switchback main power source continues power supply to equipment.In the process that this main power supply switches back and forth, require to keep voltage steady, without falling, communication equipment can not be caused to reset and restart, reduce calling traffic and interrupt.
Because the operating current of intermediate station or base station communication apparatus is larger, may from a few peace to tens peaces, mostly adopt relay to switch at present, when being switched to main power source from back-up source, voltage is stable, can not fall.But when being switched to back-up source from main power source, causing power supply to fall instantaneously, causing equipment to restart, causing well afoot call interruption.
Voltage Drop in switching is because the hangover of relay contact causes, that is fall under voltage in process, processor power-off reset in communication mainboard, and now relay does not also discharge completely, switch and also do not complete, cause communication equipment to restart; The time of restarting is general longer, may cannot provide call service, can cause serious adverse consequences when running into urgent event in tens seconds even one or two minute long-time.
Utility model content
The purpose of this utility model is to provide a kind of circuit realizing seamless mutual switching between communication equipment main power source and back-up source, ensures that communication equipment can not restart by power-off reset in electrical source exchange process.
The purpose of this utility model is achieved through the following technical solutions.
Realize the circuit that communication equipment main power supply takes over seamlessly, comprising: an AC/DC power module, its input termination main power source exchanges input, its output contact relay normally opened contact;
Back-up source direct current input contact relay normally-closed contact, relay contact connects processor main board through switch and protective circuit,
Also comprise a control switching circuit, its input termination AC/DC power module output, described control switching circuit exports termination electronic switch controling end;
One end ground connection of described electronic switch, one end of relay coil described in another termination, another termination AC/DC power module output of described relay coil.
Preferably, described electronic switch adopts switch triode Q1, and the base stage of described switch triode Q1 connects control switching circuit output, the grounded emitter of described switch triode Q1, one end of its collector connecting relay J1 coil.
Preferably, described control switching circuit comprises a resistance R1, a voltage stabilizing didoe D1, and described AC/DC power module output is connected with the negative electrode of voltage stabilizing didoe D1 through resistance R1, and the anode of described voltage stabilizing didoe D1 connects the base stage of switch triode Q1.
Preferably, also comprise a sustained diode 3, its negative electrode connects AC/DC power module output, and the anode of described sustained diode 3 connects the collector electrode of switch triode Q1.
Preferably, also comprise an a rectifier diode D2 and storage capacitor C1, the COM contact of the anode contact relay J1 of described rectifier diode D2, its negative electrode is through storage capacitor C1 ground connection.
Preferably, described voltage stabilizing didoe D1 is Zener diode, and its load voltage value is lower than a certain proportion of AC/DC power module output end voltage value.
Preferably, described rectifier diode D2 is Schottky diode, for isolation capacitance C1 to input back discharge.
Preferably, described storage capacitor C1 is used for the discharge and recharge of motherboard power supply input circuit, strengthens discharge time constant, extends electric fall time of discharging, makes the voltage in handoff procedure steady.
Preferably, described sustained diode 3 is switching diode, the reverse voltage that current switching produces instantaneously on release relay coil, to protect driving switch triode Q1.
The utility model compared with prior art, beneficial effect is: what the utility model provided realize circuit that communication equipment main power supply takes over seamlessly is by increase by control switching circuit, relay is made to start decline stage early cut-off relay coil loop current at voltage, reach quick release relay contact, thus realize the object of fast and smooth handoff.This circuit structure is simple, cost is low, reliability is high, easily implement.Operation for intermediate station communication equipment is more reliable and stable.
Accompanying drawing explanation
Fig. 1 is AC/DC power module output voltage characteristic curve chart;
Fig. 2 is the schematic block circuit diagram that the utility model realizes communication equipment main power supply and takes over seamlessly;
Fig. 3 is the utility model control switching circuit schematic diagram;
Fig. 4 is the VI performance diagram of Zener diode.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In the utility model, communication equipment includes but not limited to common intermediate station or base station, voltage to be kept steady in the main power source of communication equipment and the mutual handoff procedure of stand-by power supply, with the power good of the circuit and processor chips that ensure internal main Slab element, ensure the stable operation of system hardware and software.
Output voltage due to " AC/DC power module " has and keeps and the characteristic of slowly landing, because the output of general power module all can have several thousand microfarads to the large bulk capacitance of tens microfarads for the AC ripple of filtering low frequency.The power transfer module of about 300W capacity is exported for 12V, after exchanging input disconnection, the rated direct voltage 12V that its exports probably can about maintenance 2-3 second, then voltage exponentially characteristic decline to 0 gradually, middle meeting is through the time of one section of about 500ms, in the moment declined from 12V voltage, the time ts to motherboard circuit resetting voltage Vreset is approximately 50ms, as shown in Figure 1.
Communication equipment mainboard minimal maintenance voltage Vreset is approximately 6V, and relay coil adhesive ME for maintenance is lower than 6V.If without any measure, voltage start to decline the moment discharge completely to relay be switched to back-up source process in the middle of, 12V direct voltage can produce falling of about more than 200-500ms time span, causes the reset of motherboard circuit, result in restarting of equipment.
The utility model core concept: as Fig. 1, the Vrelease>Vreset if the magnitude of voltage Vrelease that release movement completes the moment satisfies condition, as long as meet the time conditions of (t0+tr) <ts, switching can be completed before circuit reset.Also with regard to mean from voltage start decline moment, to the time t0 in trigger voltage Vz moment, added release movement time tr, whole process time (t0+tr) will complete within 50ms, just can achieve the goal.
Setting Vz is 10V+/-0.5V, surveys the time t0 dropping to Vz from 12V and is approximately 10-20ms, be less than 10ms according to relay parameter tr, so the scope of estimation (t0+tr) is at 20-30ms, can meet the condition being less than 50ms.
Therefore, the utility model, by increase by control switching circuit, allows relay start decline stage early cut-off relay coil loop current at voltage, reaches quick release relay contact, thus realize the object of fast and smooth handoff.
Particularly, please participate in shown in Fig. 2, the utility model realizes the circuit that communication equipment main power supply takes over seamlessly and comprises:
One AC/DC power module, its input termination main power source exchanges input, its output DCIN contact relay normally opened contact NO;
Back-up source direct current input BAKIN contact relay normally-closed contact NC, relay COM contact connects processor main board through switch and protective circuit;
Further, also comprise a control switching circuit, its input termination AC/DC power module output DCIN, control switching circuit exports termination electronic switch SW control end;
One end ground connection of electronic switch, one end of other end contact relay coil, another termination AC/DC power module output DCIN of relay coil.
In Fig. 2, the power supply of communication equipment comprises two groups of inputs: " main power source exchanges input " and " input of back-up source direct current ".
Usually, main power source uses AC power.
The handoff procedure of main power supply is divided into two parts below to describe respectively.
(1) back-up source switches to main power source
Under normal circumstances, " input of back-up source direct current " of equipment exists with " main power source exchanges input " simultaneously, now " main power source exchanges input " is effective, " AC/DC power module " output " main power source " voltage DCIN in " main power source exchanges input " loop, drive electronic switch SW by " control switching circuit ", make the conducting of relay coil loop, relay adhesive, normally-closed contact NC and COM contact disconnect, and BAKIN loop disconnects; " main power source " voltage DCIN is communicated with COM contact by normally opened contact NO, and voltage DCOUT gives " switch and protective circuit " module of rear class, then gives the circuit supply in " processor main board ".
(2) main power source is switched to back-up source
" if main power source exchanges input " power down suddenly during communication equipment runs; relay discharges; " input of back-up source direct current " BAKIN is communicated with COM contact by relay normally-closed contact NC; voltage DCOUT gives " switch and protective circuit " module of rear class, then gives the circuit supply in " processor main board ".
In the process that communication equipment uses " back-up source " to power, if " main power source exchanges input " recovers, relay adhesive is made by " control switching circuit ", " input of back-up source direct current " loop disconnects, normally opened contact NO is communicated with COM contact, and " processor main board " is recovered to be powered by main power source.
And in handoff procedure (two), when being switched to back-up source from main power source, power supply is caused to fall instantaneously, equipment is caused to restart, the utility model is by increase by control switching circuit, allow relay start decline stage early cut-off relay coil loop current at voltage, reach quick release relay contact, thus realize the object of fast and smooth handoff.
Particularly, refer to shown in Fig. 3, in the utility model, control switching circuit comprises a resistance R1, a voltage stabilizing didoe D1, switch triode Q1,
AC/DC power module output DCIN is connected with the negative electrode of voltage stabilizing didoe D1 through resistance R1, and the anode of voltage stabilizing didoe D1 connects the base stage of switch triode Q1, the grounded emitter of switch triode Q1, one end of its collector connecting relay J1 coil.
Further, also comprise a sustained diode 3, its negative electrode meets AC/DC power module output DCIN, and the anode of sustained diode 3 connects the collector electrode of switch triode Q1.
Further, also comprise the COM contact of the anode contact relay J1 of a rectifier diode D2 and a storage capacitor C1, rectifier diode D2, its negative electrode through storage capacitor C1 ground connection,
Further, the negative electrode of rectifier diode D2 connects processor main board through switch and protective circuit.
In Fig. 3, when DCIN voltage is rated value 12V+/-10%, voltage stabilizing didoe D1 is in breakdown conditions, makes triode Q1 saturation conduction after R1 current limliting, drives relay coil work, completes above-mentioned handoff procedure ().
When DCIN terminal voltage is lower than 10V+/-0.5V, voltage stabilizing didoe D1 ends, and Q1 ends, and relay discharges, and completes above-mentioned handoff procedure (two).
Particularly, voltage stabilizing didoe D1 selects general Zener diode (Zener diode).Its load voltage value necessarily suitable ratio more lower slightly than DCIN terminal voltage value.The utility model DCIN, all for 12V, selects to calculate in 12V x 80% ratio, chooses the voltage-stabiliser tube that rated voltage is 10V+/-0.5V.
The VI characteristic curve of Zener diode such as Fig. 4, VF, IF are forward junction voltage and the forward conduction electric currents of diode, and VZ, IZT are reverse voltage and the reverse breakdown current of diode.The utility model make use of the reverse characteristic of voltage stabilizing didoe, when the reverse voltage being applied to diode two ends be increased to reach near puncture voltage Vz time, IZT starts to increase sharply, diode enters conducting state fast, relay coil is made to drive triode saturation conduction, relay quick pick-up, produces and switches.
When the reverse voltage being applied to diode two ends is slowly reduced near puncture voltage Vz, IZT starts rapid reduction, and the fast quick-recovery cut-off of diode, make relay coil drive triode cut-off, relay discharges fast, produces and switches.
Select the voltage stabilizing didoe of 10V, the node voltage Vz that can set trigger relay release is 10V+/-0.5V, direct voltage on relay coil stage of just having started to decline in advance can disconnect relay coil current circuit by force, about 10ms release time of relay mechanical contact, can guarantee to complete switching action in 50ms, reach the object that smooth and seamless switches, equipment is operated steadily reliably.
Preferably, switch triode Q1 selected by electronic switch, as the switch drive of relay coil, can select a triode having certain driving force.
Preferably, rectifier diode D2 is Schottky diode (Shottky barrier diode), for isolation capacitance C1 to input back discharge, has less forward drop.
Preferably, storage capacitor C1 is large bulk capacitance, for the discharge and recharge of motherboard power supply input circuit, strengthens discharge time constant, extends electric fall time of discharging, and makes the voltage in handoff procedure more steadily reliable.
Preferably, sustained diode 3 is regular tap diode, the reverse voltage that current switching produces instantaneously on release relay coil, for the protection of driving triode Q1.
Preferably, resistance R1 is the current-limiting resistance of voltage stabilizing didoe D1, chooses the saturation conduction of suitable state modulator Q1.
What the utility model provided realize circuit that communication equipment main power supply takes over seamlessly is by increase by control switching circuit, relay is made to start decline stage early cut-off relay coil loop current at voltage, reach quick release relay contact, thus realize the object of fast and smooth handoff.This circuit structure is simple, cost is low, reliability is high, easily implement.Operation for intermediate station communication equipment is more reliable and stable.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (9)
1. realize the circuit that communication equipment main power supply takes over seamlessly, comprising: an AC/DC power module, its input termination main power source exchanges input, its output contact relay normally opened contact;
Back-up source direct current input contact relay normally-closed contact, relay contact connects processor main board through switch and protective circuit, it is characterized in that;
Also comprise a control switching circuit, its input termination AC/DC power module output, described control switching circuit exports termination electronic switch controling end;
One end ground connection of described electronic switch, one end of relay coil described in another termination, another termination AC/DC power module output of described relay coil.
2. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 1, it is characterized in that, described electronic switch adopts switch triode Q1, the base stage of described switch triode Q1 connects control switching circuit output, the grounded emitter of described switch triode Q1, one end of its collector connecting relay J1 coil.
3. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 2, it is characterized in that, described control switching circuit comprises a resistance R1, a voltage stabilizing didoe D1, described AC/DC power module output is connected with the negative electrode of voltage stabilizing didoe D1 through resistance R1, and the anode of described voltage stabilizing didoe D1 connects the base stage of switch triode Q1.
4. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 2, it is characterized in that, also comprise a sustained diode 3, its negative electrode connects AC/DC power module output, and the anode of described sustained diode 3 connects the collector electrode of switch triode Q1.
5. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 2, it is characterized in that, also comprise an a rectifier diode D2 and storage capacitor C1, the COM contact of the anode contact relay J1 of described rectifier diode D2, its negative electrode is through storage capacitor C1 ground connection.
6. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 3, it is characterized in that, described voltage stabilizing didoe D1 is Zener diode, and its load voltage value is lower than a certain proportion of AC/DC power module output end voltage value.
7. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 5, it is characterized in that, described rectifier diode D2 is Schottky diode, for isolation capacitance C1 to input back discharge.
8. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 5, it is characterized in that, described storage capacitor C1 is used for the discharge and recharge of motherboard power supply input circuit, strengthens discharge time constant, extend electric fall time of discharging, make the voltage in handoff procedure steady.
9. realize the circuit that communication equipment main power supply takes over seamlessly as claimed in claim 4; it is characterized in that; described sustained diode 3 is switching diode, the reverse voltage that current switching produces instantaneously on release relay coil, to protect driving switch triode Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433962.1U CN204131213U (en) | 2014-08-01 | 2014-08-01 | A kind of circuit realizing communication equipment main power supply and take over seamlessly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433962.1U CN204131213U (en) | 2014-08-01 | 2014-08-01 | A kind of circuit realizing communication equipment main power supply and take over seamlessly |
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| Publication Number | Publication Date |
|---|---|
| CN204131213U true CN204131213U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420433962.1U Expired - Fee Related CN204131213U (en) | 2014-08-01 | 2014-08-01 | A kind of circuit realizing communication equipment main power supply and take over seamlessly |
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| CN (1) | CN204131213U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158283A (en) * | 2014-08-01 | 2014-11-19 | 科立讯通信股份有限公司 | Circuit and method for realizing smooth switching of main stand-by power source of communication equipment |
| CN104993578A (en) * | 2015-07-28 | 2015-10-21 | 兖州煤业股份有限公司 | Power supply apparatus of extraction face sensor |
| CN105186681A (en) * | 2015-10-10 | 2015-12-23 | 淄博淄柴新能源有限公司 | Uninterrupted DC power supply system |
| CN109617225A (en) * | 2018-12-18 | 2019-04-12 | 镇江中煤电子有限公司 | Mine power resource automatic power recovery device |
| CN109633291A (en) * | 2018-12-20 | 2019-04-16 | 兰州空间技术物理研究所 | Bias current master backup switching circuit in a kind of space electric field detection system |
-
2014
- 2014-08-01 CN CN201420433962.1U patent/CN204131213U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158283A (en) * | 2014-08-01 | 2014-11-19 | 科立讯通信股份有限公司 | Circuit and method for realizing smooth switching of main stand-by power source of communication equipment |
| CN104158283B (en) * | 2014-08-01 | 2017-05-17 | 科立讯通信股份有限公司 | Circuit and method for realizing smooth switching of main stand-by power source of communication equipment |
| CN104993578A (en) * | 2015-07-28 | 2015-10-21 | 兖州煤业股份有限公司 | Power supply apparatus of extraction face sensor |
| CN104993578B (en) * | 2015-07-28 | 2018-01-30 | 兖州煤业股份有限公司 | The electric supply installation of getting working face sensor |
| CN105186681A (en) * | 2015-10-10 | 2015-12-23 | 淄博淄柴新能源有限公司 | Uninterrupted DC power supply system |
| CN105186681B (en) * | 2015-10-10 | 2018-03-20 | 淄博淄柴新能源有限公司 | Uninterrupted DC power system |
| CN109617225A (en) * | 2018-12-18 | 2019-04-12 | 镇江中煤电子有限公司 | Mine power resource automatic power recovery device |
| CN109617225B (en) * | 2018-12-18 | 2023-04-25 | 镇江中煤电子有限公司 | Automatic power supply re-energizing device for mine |
| CN109633291A (en) * | 2018-12-20 | 2019-04-16 | 兰州空间技术物理研究所 | Bias current master backup switching circuit in a kind of space electric field detection system |
| CN109633291B (en) * | 2018-12-20 | 2020-11-27 | 兰州空间技术物理研究所 | Bias current main backup switching circuit in space electric field detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20210801 |
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| CF01 | Termination of patent right due to non-payment of annual fee |