CN106340944A - Power-off uninterruptible power supply device of airborne direct-current power supply system - Google Patents
Power-off uninterruptible power supply device of airborne direct-current power supply system Download PDFInfo
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- CN106340944A CN106340944A CN201610870184.6A CN201610870184A CN106340944A CN 106340944 A CN106340944 A CN 106340944A CN 201610870184 A CN201610870184 A CN 201610870184A CN 106340944 A CN106340944 A CN 106340944A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a power-off uninterruptible power supply device of an airborne direct-current power supply system. The power-off uninterruptible power supply device comprises a charging circuit, an energy storage capacitor and a discharging circuit; according to the charging circuit, a voltage-regulator tube D1, a transistor Q1 and a transistor Q2 are adopted to realize the setting of VTH; a tantalum capacitor which can withstand 100V voltage is selected as the energy storage capacitor; and according to the discharging circuit, an LM5118 controller is adopted, and peripheral components such as MOS tubes, diodes and inductors are adopted, and voltage boost-buck conversion and positive voltage output can be realized. According to the device of the invention, the capacity of the energy storage capacitor required by the device of the invention is greatly reduced, circuit cost is reduced, and the size and weight of the device are small. The device is suitable for the power-off uninterruptible power supply of a low-power airborne electronic device.
Description
Technical field
The invention belongs to power-off protection field, a kind of more particularly, to airborne DC power-supply system power-off maintains and supplies Denso
Put.
Background technology
Military aircraft 28v DC power-supply system generally adopts Redundancy power supply, is powered by main power source during normal work；?
Engine start, break down etc. in particular cases, powered by accessory power supplys such as batteries, during power supply, there are the feelings of Power convert
Condition.
National military standard gjb181-1986 and gjb181a-2003, the power interruption time in busbar or Power convert state
Cannot be greater than 50ms.For electronic equipments such as airborne computer, radars, the power failure more than 50ms may lead to data to be lost
Lose, equipment such as restarts at the serious conditions, it is desirable to have secondary power supply maintains output during power failure.Existing power-off maintains and typically adopts
With uninterrupted power source (ups), but there is the shortcomings of volume is big, weight weight, battery life are short in ups, be not suitable for small size, little work(
The electronic equipment of rate.For the charging of battery, super capacitor, generally using the control mode of first constant current, constant voltage output again, permissible
Precise control charging current, but circuit structure is relative complex, is unfavorable for compact apparatus.
In sum, when the power-off of military aircraft 28v DC power-supply system maintains the key of electric supply installation to be to ensure that interruption
Between be less than 50ms, and small volume, lightweight, reliability are high.It is big, pressure that non solid electrolyte all tantalum capacitor has capacity
The features such as height, small volume, life-span length, it is very suitable for as the energy-storage travelling wave tube in small-power electronic equipment.
Content of the invention
Technical problem underlying to be solved by this invention is to provide a kind of airborne DC power-supply system power-off to maintain to supply Denso
Put, using tantalum capacitance energy storage, ensure that power interruption time is less than 50ms, and greatly improve capacitance energy storage utilization rate, reduce
Circuit volume and cost, suppress charging surge current, thus reducing tantalum condenser failure risk simultaneously.
In order to solve above-mentioned technical problem, the invention provides a kind of airborne DC power-supply system power-off maintains and supplies Denso
Put, comprising:
Charging circuit, using voltage-stabiliser tube d1, transistor q1And q2Realize vthSetting；Controller ucc2801 adopts peak point current
Schema control, maximum duty cycle is 50%, reference voltage vref=5v；Take d3, r6, c2And q4Surge current during electricity in reduction.
Storage capacitor, the voltage drop volume according to non solid electrolyte all tantalum capacitor requires, and designs charging voltage vch=39v,
Select the tantalum electric capacity of pressure 100v.
Discharge circuit, using controller (lm5118), the peripheral component such as mos pipe, diode and inductance, realizes buck
Conversion and positive voltage output.
Compared to prior art, technical scheme possesses following beneficial effect: the invention provides one kind is airborne
DC power-supply system power-off maintains electric supply installation, while ensureing that power interruption time is less than 50ms, using tantalum capacitance energy storage,
The weight reducing device can be shown；Charging surge current is inhibited, and the power-off of discharge circuit maintains output dead-beat, required
Storage capacitor capacity substantially reduces, and circuit cost reduces.Assembly of the invention is very suitable for small-power air environment.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below by use required in embodiment
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without having to pay creative labor, others can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the circuit block diagram that airborne DC power-supply system power-off provided in an embodiment of the present invention maintains electric supply installation；
Fig. 2 is the charging circuit block diagram that airborne DC power-supply system power-off provided in an embodiment of the present invention maintains electric supply installation.
Fig. 3 is that airborne DC power-supply system power-off provided in an embodiment of the present invention maintains the pwm of electric supply installation to control
Device block diagram.
Fig. 4 is the discharge circuit frame that airborne DC power-supply system power-off provided in an embodiment of the present invention maintains electric supply installation
Figure.
Fig. 5 is the under-voltage protecting circuit that airborne DC power-supply system power-off provided in an embodiment of the present invention maintains electric supply installation
Block diagram.
Fig. 6 is v during the power-off of airborne DC power-supply system power-off maintenance electric supply installation provided in an embodiment of the present inventioninWith vs
Curve.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
With reference to Fig. 1, a kind of airborne DC power-supply system power-off maintains electric supply installation, comprising:
Charging circuit is (as shown in Figure 2) to adopt voltage-stabiliser tube d1, transistor q1And q2Realize vthSetting；Work as vin＞ vthWhen, open
By voltage-stabiliser tube d2With transistor q3The serial regulating circuit constituting, to pwm controller (ucc2801) power supply.
Controller ucc2801(is as shown in Figure 3) controlled using peak-current mode, maximum duty cycle is 50%, reference voltage
vref=5v.By resistance r11To primary current ipSampled, and through r10And c7After filtering, obtain current detection signal vcs；Logical
Cross resistance r12And r13Setting vch, sample and obtain feeding back signal vfb；vfbWith vrefAfter/2 compare, output error amplifies signal vcomp,
vcompAfter internal body diodes and electric resistance partial pressure, maximum is clamped to 1v, then with vcsRelatively, make in peripheral circuits such as pulsewidth latch
With under, realize drive control；When input or load change, the dutycycle of adjustment drive output signal is it is ensured that charging voltage vch
Stable.
vrefBy resistance r9And r10To vcsDC level v providingcs-dcFor:
(1)
Take r9=2.55k ω, r10=560, r11=100m ω, be calculated vcs-dc=0.9v.
vcomp1v, therefore v are clamped to by insidecsMaximum also can only arrive 1v, calculates peak primary currents ipFor:
(2)
Calculate ip=1.22a.
Assume transformer t in Fig. 21Primary and secondary turn ratio n=0.36, then secondary peak value electric current is=ip× n=0.44a, that is,
Secondary charging surge current maximum is 0.44a.
Assume t1Primary electrical sensibility reciprocal lp=14.40 μ h, switching frequency fs=300khz, works in discontinuous state, according to
Inductive current formula, obtains maximum duty cycle dymaxFor:
(3)
It is calculated dymax=23.95%.Due to isIt is restricted, vchReach setting value needed for time lengthening it means that
vfbIt is far below v within some timeref/ 2, now vcompMaximum will be kept to export, and be clamped to 1v, drive signal according to
The dymax output limiting.
For reducing surge current during upper electricity further, take d3, r6, c2And q4In reduction, surge current during electricity is (as schemed
Shown in 2)；After electricity on circuit, c2Both end voltage is very low, vcompBy q4Drag down, with vrefTo c2Charge, vcompVoltage slowly rises,
Realize dutycycle to be gradually increased from zero；After charging complete, circuit is in Light Condition, vcsAmplitude is less, is easily interfered, and leads to
Cross c5Clock oscillation signal is coupled to csEnd, carries out slope compensation, improves vcsAntijamming capability it is ensured that circuit work just
Often.
Storage capacitor, the voltage drop volume according to non solid electrolyte all tantalum capacitor requires, and designs charging voltage vch=39v,
Select the tantalum electric capacity of pressure 100v.
The power output of dc-dc converter is po, capacitance is c, and during normal work, electric capacity is charged to v1, storage
Primary power w1For:
(4)
After t is held time in power-off, the voltage at electric capacity two ends is reduced to v2, dump energy w2For:
(5)
In the t that holds time, electric capacity passes through discharge circuit provides energy to dc-dc it is assumed that the efficiency of dc-dc is η1, electric discharge electricity
The efficiency on road is η2, tantalum electric capacity desired volume c is:
(6)
Assume t=50ms, po=60w, η1=85%, η2=85%, v1=39v, v2=10v, are calculated c=5.844mf.Tantalum electricity during low temperature
The capacity holding can reduce it is assumed that being reduced to the 70% of normal temperature, at least should select the tantalum electric capacity of c=8.348mf.
Discharge circuit, using controller (lm5118), the peripheral component such as mos pipe, diode and inductance, realizes buck
Conversion and positive voltage export (as shown in Figure 4).The input voltage range of discharge circuit is 10～50v, and rear class dc-dc converter is permitted
Permitted minimum input voltage and be generally 16v, therefore vsIt is set to 18v.
Lm5118 is divided into 2 kinds of mode of operations: as input voltage vi ＞ vs, lm5118 is in decompression mode, now q1Lead
Logical, q2Turn off；In buck mode, when vi close to vs and dutycycle be more than 75% when, circuit enter boost mode, now q2 open
Begin to turn on, with viDecline, conducting dutycycle is gradually increased, until discharge circuit and q1Synchronization turns on and off.
Under buck-boost mode, continuous inductive current ilFor:
(7)
The power p of rear class dc-dc convertero=60w, efficiency eta1=85%, vs=18v, is calculated the output of discharge circuit by (7) formula
Electric current io=3.922a.Take filtering inductance l=4.7 μ h, switching frequency fs=300khz, vi=6v, calculates il=17.284a.Relatively
Big electric current can cause very big conduction loss and switching loss, is unfavorable for components selection, takes vimin=10v, now il=
13.261a, beneficial to design of integer electro-circuit.
viminSetting can utilize lm5118 under-voltage protection (uvlo) functional realiey, when its uvlo end level is more than
During 1.23v, drive output；When uvlo end level is less than 1.13v, then drives and terminate.Take shutoff voltage vioff=vimin=10v,
It is calculated cut-in voltage vion=10.885v, then hysteresis voltage is 0.885v.
Using under-voltage protecting circuit as shown in Figure 5, to improve hysteresis voltage, it is to avoid vsVibration.By a reference source ic1
(tl431), q1, r2Constitute reference voltage generating circuit, v with r3ref=5v；r4And r5For comparator ic2Reference voltage, r are provided7With
r8To vchSampling；ic2、r6And r10Constitute hysteresis loop comparator, to control the ulvo end of lm5118；Cut-in voltage vthonWith pass power-off
Pressure vthoffIt is respectively as follows:
(8)
(9)
In formula, vhFor the high level output of comparator, vh=vref；VLFor low level output, vl≈0v.Assume vthon=16v,
vthoff=10v, r8/(r7+r8)=0.25, is calculated r10/(r6+r10)=0.7, r5/(r4+r5)=0.714.Generally take r6+r10
>=100k ω, is conducive to circuit stability.
Based on the design of above-mentioned charging circuit, storage capacitor and discharge circuit, have developed circuit model machine.vin=22v power-off
V during 50mssCurve as shown in Figure 6.In shutdown transient, discharge circuit from unloaded saltus step to fully loaded, because dutycycle needs one
Individual adjustment process, vs somewhat reduces about 0.8v；vinFrom 0v recover to 22v when, from fully loaded saltus step to zero load, vs is somewhat for discharge circuit
Raise about 1v.This dynamic response is referred to as loaded by the load output disturbance that causes of change, increase vs output filter capacitor and
Accelerate feedback control loop response speed, disturbance amplitude can be reduced, rear class dc-dc converter will not be powered and impact.
In the present embodiment, a kind of described airborne DC power-supply system power-off maintains electric supply installation, based on whole tantalum capacitor storage
Can, using single-ended reverse exciting Topology Structure Design charging circuit, when inputting normal, tantalum electric capacity is charged to high pressure storage energy；When
Input power-off when, using buck constitute discharge circuit, capacitance energy storage is released to rear class dc-dc converter it is achieved that
50ms power-off maintains power supply and 12v circuit start to require.
The above, only present pre-ferred embodiments, the scope of present invention enforcement, skill under this invention are not limited with this
Equivalence changes and modification that art scheme and description are made, all should belong to the scope that the present invention covers.
Claims (6)
1. a kind of airborne DC power-supply system power-off maintains electric supply installation it is characterised in that including:
Charging circuit, using voltage-stabiliser tube d1, transistor q1And q2Realize vthSetting；Controller ucc2801 adopts Peak Current Mode
Formula controls, and maximum duty cycle is 50%, reference voltage vref=5v；Take d3, r6, c2And q4Surge current during electricity in reduction.
2. storage capacitor, the voltage drop volume according to non solid electrolyte all tantalum capacitor requires, and designs charging voltage vch=39v, choosing
Select the tantalum electric capacity of pressure 100v.
3. discharge circuit, using controller (lm5118), the peripheral component such as mos pipe, diode and inductance, realizes buck and turns
Change and positive voltage output.
4. a kind of airborne DC power-supply system power-off according to claim 1 maintain electric supply installation it is characterised in that: charge
Circuit adopts voltage-stabiliser tube d1, transistor q1And q2Realize vthSetting；Work as vin＞ vthWhen, open by voltage-stabiliser tube d2With transistor q3
The serial regulating circuit constituting, to pwm controller (ucc2801) power supply；
Controller ucc2801 adopts peak-current mode to control, and maximum duty cycle is 50%, reference voltage vref=5v.
5. pass through resistance r11To primary current ipSampled, and through r10And c7After filtering, obtain current detection signal vcs；Pass through
Resistance r12And r13Setting vch, sample and obtain feeding back signal vfb；vfbWith vrefAfter/2 compare, output error amplifies signal vcomp,
vcompAfter internal body diodes and electric resistance partial pressure, maximum is clamped to 1v, then with vcsRelatively, make in peripheral circuits such as pulsewidth latch
With under, realize drive control；When input or load change, the dutycycle of adjustment drive output signal is it is ensured that charging voltage vch
Stable；
vrefBy resistance r9And r10To vcsDC level v providingcs-dcFor:
(1)
vcomp1v, therefore v are clamped to by insidecsMaximum also can only arrive 1v, calculates peak primary currents ipFor:
(2)
According to inductive current formula, obtain maximum duty cycle dymaxFor:
(3)
Take d3, r6, c2And q4Surge current during electricity in reduction；After electricity on circuit, c2Both end voltage is very low, vcompBy q4Drag down,
With vrefTo c2Charge, vcompVoltage slowly rises, and realizes dutycycle and is gradually increased from zero；After charging complete, circuit is in sky
Load state, vcsAmplitude is less, is easily interfered, by c5Clock oscillation signal is coupled to csEnd, carries out slope compensation, carries
High vcsAntijamming capability it is ensured that circuit is working properly.
6. a kind of airborne DC power-supply system power-off according to claim 1 maintain electric supply installation it is characterised in that: energy storage
Electric capacity, the voltage drop volume according to non solid electrolyte all tantalum capacitor requires, and designs charging voltage vch=39v, selects pressure 100v
Tantalum electric capacity；
The power output of dc-dc converter is po, capacitance is c, and during normal work, electric capacity is charged to v1, storage initial
Energy w1For:
(4)
After t is held time in power-off, the voltage at electric capacity two ends is reduced to v2, dump energy w2For:
(5)
In the t that holds time, electric capacity passes through discharge circuit provides energy to dc-dc it is assumed that the efficiency of dc-dc is η1, discharge circuit
Efficiency be η2, tantalum electric capacity desired volume c is:
(6)
A kind of airborne DC power-supply system power-off according to claim 1 maintain electric supply installation it is characterised in that: electric discharge electricity
Road adopts controller (lm5118), and the peripheral component such as mos pipe, diode and inductance, realizes buck conversion and positive voltage is defeated
Go out；
Lm5118 is divided into 2 kinds of mode of operations: as input voltage vi ＞ vs, lm5118 is in decompression mode, now q1Conducting, q2
Turn off；In buck mode, when vi close to vs and dutycycle be more than 75% when, circuit enter boost mode, now q2Start to lead
Logical, with viDecline, conducting dutycycle is gradually increased, until discharge circuit and q1Synchronization turns on and off；
Under buck-boost mode, continuous inductive current ilFor:
(7)
Using under-voltage protecting circuit, to improve hysteresis voltage, it is to avoid vs vibrates；By a reference source ic1(tl431), q1, r2And r3Structure
Become reference voltage generating circuit, vref=5v；r4And r5For comparator ic2Reference voltage, r are provided7And r8To vchSampling；ic2、r6With
r10Constitute hysteresis loop comparator, to control the ulvo end of lm5118；Cut-in voltage vthonWith shutoff voltage vthoffIt is respectively as follows:
(8)
(9)
In formula, vhFor the high level output of comparator, vh=vref；VLFor low level output, vl≈0v.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610870184.6A CN106340944A (en) | 2016-10-05 | 2016-10-05 | Power-off uninterruptible power supply device of airborne direct-current power supply system |
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Cited By (6)
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| CN108226747A (en) * | 2017-11-30 | 2018-06-29 | 北京康拓科技有限公司 | A kind of dynamic circuit failure on-line detecting method |
| CN110350653A (en) * | 2019-07-15 | 2019-10-18 | 西安应用光学研究所 | A kind of stable DC power supply conversion control circuit for airborne photoelectric stabilized platform |
| CN110474414A (en) * | 2019-08-26 | 2019-11-19 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of onboard radar system and the super capacitor for airborne radar determine method |
| CN110798085A (en) * | 2019-11-14 | 2020-02-14 | 青岛航天半导体研究所有限公司 | Improved input voltage circuit |
| CN111525516A (en) * | 2020-05-21 | 2020-08-11 | 上海华铭智能终端设备股份有限公司 | Power supply device and vehicle-mounted POS machine |
| CN112072910A (en) * | 2020-07-27 | 2020-12-11 | 恒宇信通航空装备(北京)股份有限公司 | Small-power supply meeting national military standard airborne equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226747A (en) * | 2017-11-30 | 2018-06-29 | 北京康拓科技有限公司 | A kind of dynamic circuit failure on-line detecting method |
| CN110350653A (en) * | 2019-07-15 | 2019-10-18 | 西安应用光学研究所 | A kind of stable DC power supply conversion control circuit for airborne photoelectric stabilized platform |
| CN110474414A (en) * | 2019-08-26 | 2019-11-19 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of onboard radar system and the super capacitor for airborne radar determine method |
| CN110474414B (en) * | 2019-08-26 | 2023-05-05 | 中国航空工业集团公司沈阳飞机设计研究所 | Airborne radar system and super capacitor determination method for airborne radar |
| CN110798085A (en) * | 2019-11-14 | 2020-02-14 | 青岛航天半导体研究所有限公司 | Improved input voltage circuit |
| CN111525516A (en) * | 2020-05-21 | 2020-08-11 | 上海华铭智能终端设备股份有限公司 | Power supply device and vehicle-mounted POS machine |
| CN112072910A (en) * | 2020-07-27 | 2020-12-11 | 恒宇信通航空装备(北京)股份有限公司 | Small-power supply meeting national military standard airborne equipment |
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Application publication date: 20170118 |