CN107889307A - A kind of vehicle passenger cab illumination redundancy backup power supply circuit and control method - Google Patents
A kind of vehicle passenger cab illumination redundancy backup power supply circuit and control method Download PDFInfo
- Publication number
- CN107889307A CN107889307A CN201711060964.5A CN201711060964A CN107889307A CN 107889307 A CN107889307 A CN 107889307A CN 201711060964 A CN201711060964 A CN 201711060964A CN 107889307 A CN107889307 A CN 107889307A
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- power supply
- circuit
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- power
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Stand-By Power Supply Arrangements (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention discloses a kind of vehicle passenger cab illumination redundancy backup power supply circuit, including two internal structure identical driving powers, respectively the first driving power and the second driving power, the input of two driving powers is connected with power supply circuit, the output end of two driving powers connects respectively to be loaded all the way, the load capacity of the driving power is higher than actual loading, the driving power includes power circuit unit, control circuit unit and stand-by circuit unit, the input of the driving power draws power circuit unit and control circuit unit, the positive pole and stand-by circuit unit of the power circuit unit load, the negative pole of the control circuit unit connection load, the stand-by circuit unit of two driving powers is connected with each other.The disclosure of the invention control method of the power supply circuit simultaneously, present invention incorporates the advantage of existing redundant power supply method, the stability of vehicle passenger cab lighting power supply system can be greatly improved.
Description
Technical field
The present invention relates to power supply unit field, and in particular to a kind of vehicle passenger cab illumination redundancy backup power supply circuit and control
Method.
Background technology
It is more next to the reliability requirement of vehicle passenger cab lighting power supply system with the fast development of urban track traffic industry
Higher, railcar is typically operated in tunnel, it is necessary to by guest room light fixture system illumination, if power supply, which breaks down, causes guest room
Without illumination, passenger will be caused panic, influence train driving safety.The method of generally use power supply redundancy can to improve power supply at present
By property, catastrophic failure is tackled.Existing power supply redundancy scheme has：The N+1 backups of capacity redundancy, redundancy cold standby, parallel current-sharing
And redundancy backup.Capacity redundancy refers to that the maximum load capability of power supply is more than actual loading, and reserved capacity space can ensure to bear
Carry normal work and can ensure normal work under situation of change within the specific limits in load, but capacity redundancy can tackle it is negative
It is limited to carry variable quantity, is had little significance to improving reliability；Redundancy cold standby refers to that power supply is made up of multiple function identical modules,
By one of power supply when normal, when its failure, backup battery starts work at once, and it is when power supply switches between existence time
Every voltage gap being easily caused, so as to cause system-down；The N+1 backup modes of parallel current-sharing refer to power supply by multiple identical
Unit is formed, and each unit is connected in parallel by OR gate diode, is powered simultaneously to equipment from each unit, this scheme is at one
Easily involve all units when load supplying is not interfered with during power failure, but loading terminal shortcircuit, the risk that overall failure be present；
Redundancy backup refers to that power supply is composed of multiple units, while work, backup battery can be thrown immediately during mains power failure
Enter, output voltage fluctuation very little, but only powered at full capacity to all devices from one of power supply, other power supplys are unloaded, make full
The power source life of load operation is decayed until the stand-by power supply that breaks down starts at first, and power supply input cost is big.Redundancy above
The equal Shortcomings of backup method, can not meet the requirement of vehicle passenger cab lighting power supply system reliability.
In view of drawbacks described above, creator of the present invention obtains a kind of car of the present invention finally by prolonged research and practice
Guest room illumination redundancy backup power supply circuit and control method.
The content of the invention
To solve above-mentioned technological deficiency, the technical solution adopted by the present invention is, there is provided a kind of redundancy backup power supply circuit,
Powered for rail traffic vehicles guest room illuminator, including two internal structure identical driving powers, respectively first drives
Dynamic power supply and the second driving power, the input of two driving powers are connected with power supply circuit, two driving electricity
The output end in source connects respectively to be loaded all the way, and the load capacity of the driving power is higher than actual loading, the driving power bag
Power circuit unit, control circuit unit and stand-by circuit unit are included, the input of the driving power draws power circuit list
Member and control circuit unit, the positive pole and stand-by circuit unit of the power circuit unit connection load, the control circuit list
The negative pole of member connection load, the stand-by circuit unit of two driving powers are connected with each other.
Preferably, the stand-by circuit unit includes a backup input circuit and a backup output circuit, described first drives
Backup input circuit/backup output circuit of dynamic power supply is defeated with backup output circuit/backup of second driving power respectively
Enter circuit connection.
Preferably, the fallback circuit unit includes a relay and a voltage-regulator diode, it is logical that the relay includes one
Disconnect closing and connect the power circuit unit, the negative pole of the voltage-regulator diode with a coil, the positive pole of the voltage-regulator diode
It is connected with the input of the coil, the output end connection common port of the coil, described in the both ends connection of the on-off switch
Backup input circuit.
Preferably, the power circuit unit includes a voltage-stabilized power supply and a diode, the input of the voltage-stabilized power supply
It is connected with power supply circuit, the cathode output end of the voltage-stabilized power supply connects the positive pole of the diode, and the voltage-stabilized power supply is born
Pole output end connection common port, the negative pole of the diode draw the positive pole and fallback circuit unit of load.
Preferably, the rated power of the voltage-stabilized power supply is 350W, the voltage-stabilized power supply has malfunction indicator lamp.
Preferably, the control circuit unit includes a single-chip microcomputer, a microcontroller power supply and an adjustment switch, the monolithic
The input of electromechanical source is connected with power supply circuit, and the output end of the microcontroller power supply is connected with the single-chip microcomputer, the adjustment
Switch includes first end, the second end and controls its first end and the control terminal of the second end conducting, the control of the adjustment switch
End connects the signal output part of the single-chip microcomputer, the negative pole of the first end connection load of the adjustment switch, the adjustment switch
The second end connection common port.
Preferably, the adjustment switch is N-channel type metal-oxide-semiconductor, the first end is drain electrode, and second end is source electrode,
The control terminal is grid.
Preferably, the control circuit unit also includes a toggle switch, the letter of the toggle switch and the single-chip microcomputer
The connection of number input.
Preferably, the input of the driving power has a urgency signal input circuit, the urgency signal input circuit
It is connected through light-coupled isolation with a signal input part of the single-chip microcomputer, the control circuit unit includes a failure feedback electricity
Road, the signal output part of the single-chip microcomputer draw fault-signal through light-coupled isolation.
A kind of control method with above-mentioned vehicle passenger cab illumination redundancy backup power supply circuit, comprises the following steps：
Stp1：Electric on power supply circuit, driving power light-load starting, two-way driving power gives two-way load supplying respectively；
Stp2：Control circuit unit adjustment load intensity of illumination；
Stp3：A certain driving power failure, fallback circuit unit are connected, and normal driving power is vehicle load supplying；.
Stp4：Failure driving power sends fault cues signal；
Stp5：Power supply circuit is accessed after failure driving power reparation, Stp1 steps is repeated, is respectively by two-way driving power
Two-way load supplying.
Compared with the prior art the beneficial effects of the present invention are：The redundancy backup power supply circuit is applied to guest room illumination and supplied
Electric system, the driving power that equipment is mutually redundant backup by two form, while work, backups each other, load is also classified into
Duplex feeding, each unit is separate in normal work, and load divides two-way individually to power will not when ensure that load terminal shortcircuit
Involve all units；When a driving power failure, the driving power by back up single channel unit loaded be connected to it is another
On one power supply, powered by it for vehicle light fixture, the load to normal power source has no effect, no-voltage gap；It is and single
Driving power design capacity redundancy, driving power is operated under the conditions of underloading during normal work, will not be to the life-span of driving power
Impact, when breaking down, a driving power is with regard to that can be individually for whole load supplyings.This equipment also has fault alarm
Function, when a failure occurs the indicator lamp of power supply light, simultaneous faults signal output part output fault cues signal.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in various embodiments of the present invention
The accompanying drawing used is briefly described.
Fig. 1 is the structured flowchart of redundancy backup power supply circuit of the present invention；
Fig. 2 is the electronic circuitry of redundancy backup power supply circuit of the present invention；
The enlarged drawing of Fig. 3 driving power inputs；
The enlarged drawing of Fig. 4 driving power output ends；
Fig. 5 is the workflow diagram of redundancy backup power supply circuit.
Numeral represents in figure：
1. the control circuit unit 13. of the first 2. second driving power of driving power, 11. power circuit unit 12. backs up
Circuit unit
Embodiment
Below in conjunction with accompanying drawing, the forgoing and additional technical features and advantages are described in more detail.
As shown in figure 1, a kind of redundancy backup power supply circuit for the power supply of rail traffic vehicles guest room illuminator, including
Two internal structure identical driving powers, respectively the first driving power 1 and the second driving power 2.Two driving electricity
The input in source is connected with power supply circuit, and output end connects load all the way respectively.
The driving power has power circuit unit 11, control circuit unit 12 and fallback circuit unit 13.The electricity
Source circuit unit 11 is used to for the electric power that vehicle power supply circuit provides to be converted into stable output, is used for load.The control
Circuit unit 12 is used to control output current, adjustment load brightness of illumination.The fallback circuit unit 11 of two driving powers is mutual
Connection, makes two driving powers backup each other.Two-way is divided individually to supply without contact, load between two driving powers during normal work
Electricity will not involve all units when ensure that load terminal shortcircuit.
As shown in Figure 2, Figure 3, Figure 4, two-way load is LED light source 1 and LED light source 2, respectively by the He of the first driving power 1
Second driving power 2 is individually powered.Two driving power internal structures are identical, by taking the first driving power 1 as an example, driving power tool
There are an input interface CON1, an output interface CON2 and a backup interface CON3.Input interface CON1 has power supply defeated
Enter and hold 110V+, 110V-, urgency signal input EM, fault-signal output end TCMS.Output interface CON2 has output end LED
+, LED-, earth terminal PE.Backup interface CON3 has backup output end OUT+, backup input IN+, public terminal GND, earth terminal
PE.Input interface CON1 is connected with vehicle powering system, and output interface CON2 connects with load, the output of the first driving power 1
Interface CON2 is connected with LED light source 1, and the output interface CON2 of the second driving power 2 is connected with LED light source 2, two driving powers
Backup interface CON3 be connected with each other.
The power circuit unit 11 includes an a voltage-stabilized power supply U1 and diode Z1, input interface CON1 input
110V+, 110V- connection voltage-stabilized power supply U1.Voltage-stabilized power supply U1 cathode output end connection diode Z1 positive pole, cathode output end
Connect common port.Diode Z1 negative pole connection output interface CON2 output end LED+, while diode Z1 negative pole is drawn
Fallback circuit unit 13.The rated power of the voltage-stabilized power supply U1 is 350W, and its load capacity is higher than actual loading LED light source 1
With LED light source 2.Voltage-stabilized power supply U1 is operated under the conditions of underloading during normal work, and power source life will not be impacted, single electricity
Source design capacity redundancy, when breaking down, a driving power is with regard to that can be individually for whole load supplyings.Voltage-stabilized power supply U1 is also set
Faulty indicator lamp, when power failure, power supply indicator is bright, carries out fault alarm.
The control circuit unit 12 includes a single-chip microprocessor MCU, the adjustment switches of a microcontroller power supply U2 and one Q1.Driving electricity
Source input interface CON1 input 110V+, 110V- draws microcontroller power supply U2, microcontroller power supply U2 output end and monolithic
Machine MCU connections, powered for single-chip microprocessor MCU.Input interface CON1 urgency signal input EM is through optical coupling isolator OC1 and monolithic
Machine MCU input connection, for sending emergency parachute to single-chip microprocessor MCU.One output end of single-chip microprocessor MCU is through light-coupled isolation
Device OC2 is connected with input interface CON1 fault-signal output end TCMS, for fed power supplies fault-signal, when a failure occurs
The indicator lamp of power supply lights simultaneous faults signal output part TCMS output high level prompting failures.Fault-signal output end TCMS exists
It is that output is that low level is about 1.5V during normal work, high level is exported in failure.
The adjustment switch Q1 includes first end, the second end and controls its first end and the control terminal of the second end conducting,
Its control terminal connects the signal output part of single-chip microprocessor MCU, and first end connection output interface CON2 output end LED-, the second end connects
Connect output interface CON3 public terminal GND.Adjustment switch Q1 is N-channel type metal-oxide-semiconductor, and first end is drain electrode, and the second end is source
Pole, control terminal are grid.Single-chip microprocessor MCU can send dim signal to adjustment switch Q1, and switch Q1 controls are adjusted by changing
The voltage at end, realize the regulation of load brightness of illumination.
The control circuit unit 12 also includes a toggle switch SW, the signal input of toggle switch SW and single-chip microprocessor MCU
End connection.Multiple gears can be selected by toggle switch SW, adjust brightness.It can also realize that Emergency Light pattern is adjusted automatically
Whole brightness of illumination.
The fallback circuit unit 13 includes a backup input circuit and a backup output circuit, backup input circuit and standby
Part output circuit is drawn from power circuit unit 11, and the backup output end OUT+ of backup output circuit and backup interface CON3 connects
Connect, backup input circuit is connected with backup interface CON3 backup input IN+.The backup interface CON3 of two driving powers connects
When connecing, backup input circuit/backup output circuit of the first driving power 1 is electric with the backup output of the second driving power 2 respectively
Road/backup input circuit forms connection.
Fallback circuit unit 13 includes an a relay K1 and voltage-regulator diode ZD1.The relay K1 includes a break-make
Switch and a coil, the positive pole connection voltage-stabilized power supply U1 of the voltage-regulator diode ZD1 port of export, voltage-regulator diode ZD1's is negative
Pole is connected with the input of relay K1 coils, the output end connection common port of relay K1 coils, relay K1 on-off switches
Both ends connection backup input circuit.During normal work, the input of relay K1 coils obtains electric, on-off switch disconnection, two-way
The fallback circuit of driving power disconnects, and gives two-way load supplying respectively.Using the voltage-stabilized power supply U1 failures of the first driving power 1 as
Example, driving power failure is without output, and relay K1 is without input signal, on-off switch contact closure, the backup of the first driving power 1
Input circuit and the backup output circuit of the second driving power 2 are connected, and are whole load supplyings by the second driving power 2.Pass through
Relay K1 closures contact is that LED light source 1 is powered, and the load to the second driving power 2 has no effect, no-voltage gap, real
Now when one of driving power failure, vehicle illuminates the switching of flicker free.
As shown in figure 5, the control method of the redundancy backup power supply circuit, comprises the following steps：
Stp1：LED luminance makes the voltage stabilizing electricity of two driving powers from secretly gradually brightening when electric on redundancy backup power supply circuit
Source U1 reduces input starting current, while relay K1 inputs obtain electric, contact disconnection, two-way driving power from light-load starting
Two paths of LED light source power supply is given respectively, and individually power supply, which ensure that, will not involve all units during partial load terminal shortcircuit.
Stp2：Gear is adjusted by toggle switch SW, single-chip microprocessor MCU sends dim signal, and control LED light source illumination is strong
Degree.
Stp3：A certain driving power failure, the voltage-stabilized power supply U1 of the driving power believe without output, relay K1 without input
Number, contact closure, be connected by fallback circuit with backup driving power, backup driving power is vehicle load supplying, by after
Electrical equipment K1 closures are the load supplying of trouble power, and the load to normal power source has no effect, no-voltage gap.
Stp4：The malfunction indicator lamp of failure driving power is bright, simultaneous faults output port TCMS output high level prompting events
Barrier.
Stp5：Failure driving power is repaired, power supply circuit is accessed after reparation, Stp1 steps is repeated, is driven by two-way
Dynamic power supply is respectively two-way load supplying.
The redundancy backup power supply circuit combines capacity redundancy, the N+1 backups of parallel current-sharing and the advantage of redundancy backup,
Power supply is made up of two units, while work, backups each other, load is also classified into duplex feeding, and each unit is in normal work
When it is separate, when power supply breaks down, make failure electric by the backup cable cut-off between power supply of relay
The load in source is connected on another power supply, is all load supplyings by it, and backup battery can drive immediately during power failure
All load, the load to normal power source have no effect no-voltage gap, and improve vehicle passenger cab lighting power supply system can
By property.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for the purpose of the present invention, and it is non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (10)
1. a kind of vehicle passenger cab illuminates redundancy backup power supply circuit, it is characterised in that is driven including two internal structure identicals
Power supply, respectively the first driving power and the second driving power, the input of two driving powers connect with power supply circuit
Connect, the output end of two driving powers connects respectively to be loaded all the way, and the load capacity of the driving power is higher than actual negative
Carry, the driving power includes power circuit unit, control circuit unit and stand-by circuit unit, the input of the driving power
Draw power circuit unit and control circuit unit, the positive pole and stand-by circuit list of the power circuit unit connection load in end
Member, the negative pole of the control circuit unit connection load, the stand-by circuit unit of two driving powers are connected with each other.
2. redundancy backup power supply unit as claimed in claim 1, it is characterised in that the stand-by circuit unit includes a backup
Input circuit and a backup output circuit, backup input circuit/backup output circuit of first driving power respectively with institute
State backup output circuit/backup input circuit connection of the second driving power.
3. redundancy backup power supply unit as claimed in claim 2, it is characterised in that the fallback circuit unit includes a relay
Device and a voltage-regulator diode, the relay include an on-off switch and a coil, the positive pole connection institute of the voltage-regulator diode
Power circuit unit is stated, the negative pole of the voltage-regulator diode is connected with the input of the coil, and the output end of the coil connects
Common port is connect, the both ends of the on-off switch connect the backup input circuit.
4. vehicle passenger cab as claimed in claim 3 illuminates redundancy backup power supply circuit, it is characterised in that the power circuit list
Member includes a voltage-stabilized power supply and a diode, and the input of the voltage-stabilized power supply is connected with power supply circuit, the voltage-stabilized power supply
Cathode output end connects the positive pole of the diode, the cathode output end connection common port of the voltage-stabilized power supply, the diode
Negative pole draw load positive pole and fallback circuit unit.
5. vehicle passenger cab as claimed in claim 4 illuminates redundancy backup power supply circuit, it is characterised in that the voltage-stabilized power supply
Rated power is 350W, and the voltage-stabilized power supply has malfunction indicator lamp.
6. vehicle passenger cab as claimed in claim 4 illuminates redundancy backup power supply circuit, it is characterised in that the control circuit list
Member includes a single-chip microcomputer, a microcontroller power supply and an adjustment switch, the input of the microcontroller power supply and is connected with power supply circuit,
The output end of the microcontroller power supply is connected with the single-chip microcomputer, and the adjustment switch includes first end, the second end and control
Its first end and the control terminal of the second end conducting, the control terminal of the adjustment switch connect the signal output part of the single-chip microcomputer,
The negative pole of the first end connection load of the adjustment switch, the second end connection common port of the adjustment switch.
7. vehicle passenger cab as claimed in claim 6 illuminates redundancy backup power supply circuit, it is characterised in that the adjustment switch is
N-channel type metal-oxide-semiconductor, the first end are drain electrode, and second end is source electrode, and the control terminal is grid.
8. vehicle passenger cab as claimed in claim 6 illuminates redundancy backup power supply circuit, it is characterised in that the control circuit list
Member also includes a toggle switch, and the toggle switch is connected with the signal input part of the single-chip microcomputer.
9. vehicle passenger cab as claimed in claim 8 illuminates redundancy backup power supply circuit, it is characterised in that the driving power
Input has a urgency signal input circuit, a letter of the urgency signal input circuit through light-coupled isolation and the single-chip microcomputer
The connection of number input, the control circuit unit include a fault feedback circuit, and the signal output part of the single-chip microcomputer is through light
Fault-signal is drawn in coupling isolation.
10. a kind of control method with vehicle passenger cab as claimed in claim 1 illumination redundancy backup power supply circuit, its feature
It is, comprises the following steps：
Stp1：Electric on power supply circuit, driving power light-load starting, two-way driving power gives two-way load supplying respectively；
Stp2：Control circuit unit adjustment load intensity of illumination；
Stp3：A certain driving power failure, fallback circuit unit are connected, and normal driving power is vehicle load supplying；.
Stp4：Failure driving power sends fault cues signal；
Stp5：Power supply circuit is accessed after failure driving power reparation, Stp1 steps is repeated, is respectively two-way by two-way driving power
Load supplying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711060964.5A CN107889307B (en) | 2017-11-02 | 2017-11-02 | Vehicle passenger room illumination redundancy backup power supply circuit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711060964.5A CN107889307B (en) | 2017-11-02 | 2017-11-02 | Vehicle passenger room illumination redundancy backup power supply circuit and control method |
Publications (2)
| Publication Number | Publication Date |
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| CN107889307A true CN107889307A (en) | 2018-04-06 |
| CN107889307B CN107889307B (en) | 2020-12-04 |
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ID=61783547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711060964.5A Active CN107889307B (en) | 2017-11-02 | 2017-11-02 | Vehicle passenger room illumination redundancy backup power supply circuit and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600295A (en) * | 2020-12-04 | 2021-04-02 | 清华大学 | Power supply method for redundant vehicle-mounted sensor |
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| JPH01160330A (en) * | 1987-12-17 | 1989-06-23 | Nec Corp | Power supply circuit |
| JPH04183234A (en) * | 1990-11-13 | 1992-06-30 | Meidensha Corp | System switcher for uninterruptible power supply system |
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| CN112600295A (en) * | 2020-12-04 | 2021-04-02 | 清华大学 | Power supply method for redundant vehicle-mounted sensor |
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