CN103595038B - Actively current-sharing and blood pressure lowering current-sharing merge power-supply system and the power-supply system combination of application - Google Patents
Actively current-sharing and blood pressure lowering current-sharing merge power-supply system and the power-supply system combination of application Download PDFInfo
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Abstract
The invention discloses a kind of active current-sharing and blood pressure lowering current-sharing merges the power-supply system applied and power-supply system combination, power-supply system comprises: system load；And multiple power supply unit, it is connected in parallel with each other and is connected with system load, with output load current respectively to system load, each of which power supply unit has actively flow equalizing circuit and blood pressure lowering flow equalizing circuit, and whether the active flow equalizing circuit of each power supply unit reaches the first current setpoint according to load current and enters operating mode or operation stop mode, whether the blood pressure lowering flow equalizing circuit of each power supply unit reaches the second current setpoint according to load current and enters operating mode or operation stop mode, so that each power supply unit with actively all Flow Technique and/or blood pressure lowering equal Flow Technique mean allocation ground output load current.
Description
Technical field
The present invention is about a kind of power-supply system, and has parallel power sources, and each power supply supply especially in regard to one
Utensil actively current-sharing and the active current-sharing of blood pressure lowering flow equalizing function and blood pressure lowering current-sharing merge power-supply system and the power-supply system group of application
Close.
Background technology
Recently as the progress of science and technology, the electronic product with difference in functionality of all kinds is the most gradually developed,
These electronic products with difference in functionality of all kinds not only meet the various different demands of people, more incorporate everyone
Daily life so that people live more convenient.The electronic product of these difference in functionalitys of all kinds is by various electronic component institutes
Composition, and the supply voltage needed for each electronic component is not quite similar, therefore, the alternating current power supply that electric power system now provides
It is not appropriate for being supplied directly to electronic product to use.In order to provide suitable voltage to make it normally transport to each electronic component
Make, these electronic products need alternating current power supply, the most general civil power by power supply unit, be converted to suitable voltage to
Electronic product uses.
And along with the consciousness of green energy environmental protection gradually comes back, various electronic products are there's no one who doesn't or isn't tried every possible means towards saving energy resource consumption
Direction is developed, and power supply unit is also such, therefore to reach the energy use optimization and provide load high-reliability with
And High-current output, by parallel, to constitute a power-supply system for the power supply unit of identical wattage or multiple different wattage
More and more universal.
Parallel power sources in part power-supply system each has actively current-sharing (active current at present
Sharing) circuit, with by have the equal Flow Technique of active of accurate current-sharing advantage allow load needed for electric current can distribute fifty-fifty
On each power supply unit, additionally, also there is the parallel power sources in part power-supply system the most each to have blood pressure lowering
(droop) flow equalizing circuit, so that by having, circuit is simple, reaction is fast and the equal Flow Technique of blood pressure lowering that is that be difficult to shake allows needed for loading
Electric current can average being assigned on each power supply unit.
But those skilled in the art it will be clearly understood that, although utilize actively all Flow Technique or the equal Flow Technique of blood pressure lowering comes
Reaching current-sharing purpose and have respective advantage, the most all Flow Technique there is also and supplied by each power supply making parallel power sources
Answering utensil to have slow and easily concussion the disappearance of complex circuit, reaction, similarly, the equal Flow Technique of blood pressure lowering there is also and makes parallel power supply
The disappearance of device current-sharing poor effect, it follows that user is only capable of selecting in advance into active current-sharing also according to actual demand
Join power supply unit or the parallel power sources for blood pressure lowering current-sharing constitutes power-supply system, and power-supply system cannot be made also
Connection power supply unit can flexibly use the most all Flow Technique, the equal Flow Technique of blood pressure lowering or above-mentioned two according to various different demands
The merging application of the technology of kind.
What is more, in order to improve the reliability of power-supply system, the most all can be at the parallel power sources in power-supply system
The power supply unit of an extra multi-parallel at least redundant again, to guarantee when for providing electric energy loaded parallel power sources
When having at least one power supply unit exception in if, the electric energy that power-supply system still can be provided by the power supply unit of redundant
And normal operation a period of time or have enough time immediate reaction, this is so-called N+1 system, namely power-supply system is actually
The demand of corresponding load only needs N platform power supply unit, but needs at least N+1 platform to maintain its running smoothly.But in order to when using
When providing at least one the power supply unit exception in the parallel power sources of the required electric energy of load, the power supply of redundant supplies
Answering device can provide redundant function immediately, the power supply unit of this redundant has to last for being in operating state, and owing to power supply supplies
Device is answered always to have its basic electric energy loss when running, therefore when installing more multiple stage power supply unit, power-supply system in power-supply system
Total power consumption more increase, in other words, i.e. power-supply system is actually by power supply unit and this redundant because installing redundant
Power supply unit be continuously in operating state and have unnecessary electric energy loss.
Therefore, how to develop a kind of active current-sharing improving above-mentioned prior art disappearance and blood pressure lowering current-sharing merges application
Power-supply system and power-supply system combination, the problem that actually correlative technology field person is the most in the urgent need to address.
Summary of the invention
For solving the problems referred to above of the prior art, the main purpose of this case is to provide a kind of actively current-sharing and blood pressure lowering equal
Stream merges power-supply system and the power-supply system combination of application, has actively current-sharing by the multiple power supply units in power-supply system
Circuit and blood pressure lowering flow equalizing circuit, and actively flow equalizing circuit and blood pressure lowering flow equalizing circuit can start according to actual demand, therefore can
The parallel power sources making power-supply system can flexibly use the most all Flow Technique, the equal Flow Technique of blood pressure lowering or above two technology
Merging application, also make the parallel power sources within power-supply system have the function of redundant, and can supply at arbitrary power supply
When answering device exception, send unloader signal to notify that system load unloads, therefore this power-supply system redundant need not be the most additionally set
Power supply unit, be not only to maintain high-reliability with power-supply system, it is possible to reduce the consume of unnecessary electric energy.
For reaching above-mentioned purpose, the aspect of preferably implementing of this case merges application for a kind of active current-sharing of offer and blood pressure lowering current-sharing
Power-supply system, comprises: system load；And multiple power supply unit, it is connected in parallel with each other and is connected with system load, with respectively
Output load current is to system load, and each of which power supply unit has actively flow equalizing circuit and blood pressure lowering flow equalizing circuit, and
Whether the active flow equalizing circuit of each power supply unit reaches the first current setpoint according to load current and enters operating mode
Or operation stop mode, whether the blood pressure lowering flow equalizing circuit of each power supply unit reaches the second current setpoint according to load current
And enter operating mode or operation stop mode, so that each power supply unit is equal with the most all Flow Technique and/or blood pressure lowering respectively
Flow Technique and mean allocation ground output load current.
For reaching above-mentioned purpose, the aspect of preferably implementing of this case separately provides a kind of active current-sharing and blood pressure lowering current-sharing to merge application
Power-supply system combine, comprise: multiple power-supply systems, be serially connected, each power-supply system have multiple power supply unit and
System load, multiple power supply units are connected in parallel and are connected with system load, with output load current respectively to system load,
Each of which power supply unit has actively flow equalizing circuit and blood pressure lowering flow equalizing circuit, and the active current-sharing of each power supply unit
Whether circuit reaches one first current setpoint according to load current and enters operating mode or operation stop mode, each power supply
Whether the blood pressure lowering flow equalizing circuit of supply reaches one second current setpoint according to load current and enters operating mode or stopping
Operating mode, makes each power supply unit export to mean allocation with the most all Flow Technique and/or blood pressure lowering equal Flow Technique respectively
Load current is to system load；Wherein when arbitrary power-supply system of multiple power-supply systems is transshipped, in remaining multiple power-supply system
Power-supply system for underloading or zero load provides additional power to the power-supply system of overload.
For reaching above-mentioned purpose, the aspect of preferably implementing of this case provides again a kind of active current-sharing and blood pressure lowering current-sharing to merge application
Power-supply system combines, and comprises: multiple power-supply systems, and each power-supply system has multiple first power supply unit and system load,
Multiple first power supply units are connected in parallel and connect with corresponding system load, negative to system to export a load current respectively
Carry；And power supply storehouse, it is connected with multiple power-supply systems, and there are the multiple second source supplies being connected in parallel, in arbitrary electricity
During origin system overload, multiple second source supplies output load current respectively, make the output of power supply storehouse be supplied by multiple second sources
The redundant electric energy that the load current answering device to export is constituted is to the power-supply system transshipped；Each of which the first power supply unit and every
One second source supply is respectively provided with actively flow equalizing circuit and blood pressure lowering flow equalizing circuit, and each first power supply unit and every
Whether the active flow equalizing circuit of one second source supply reaches the first corresponding electric current according to corresponding load current respectively sets
Pinpoint and enter operating mode or operation stop mode, each first power supply unit and the blood pressure lowering of each second source supply
Whether flow equalizing circuit reaches the second corresponding current setpoint according to corresponding load current and enters operating mode or stop fortune
Operation mode, so that each first power supply unit and each second source supply are respectively with the most all Flow Technique and/or blood pressure lowering
All Flow Technique and load current corresponding to mean allocation ground output.
Accompanying drawing explanation
Fig. 1 is the active current-sharing of this case preferred embodiment and blood pressure lowering current-sharing merges the square signal of power-supply system of application
Figure.
Fig. 2 is voltage and the operating curve figure of electric current of the arbitrary power supply unit shown in Fig. 1.
Fig. 3 is the thin portion electrical block diagram of the single power supply supply shown in Fig. 1.
The electrical block diagram of the power-supply system combination that Fig. 4 is constituted by power-supply system as shown in Figure 1.
Fig. 5 is the electrical block diagram of the power-supply system combination of another preferred embodiment of this case.
Wherein, description of reference numerals is as follows:
1,50: power-supply system
10: system load
11: power supply unit
12: power supply circuit
120: power-supply unit
121: the first protection circuits
13: feedback circuit
14: and/or control circuit
15: actively flow equalizing circuit
151: stable state switching circuit
152: the second protection circuits
153: order unit altogether
154: partial pressure unit
155: actively current-sharing feedback unit
16: blood pressure lowering flow equalizing circuit
17: current-sensing circuit
18: bus
4,5: power-supply system combines
500: the first power supply units
51: power supply storehouse
510: second source supply
Io: load current
Vo: load voltage
Vf: feedback signal
Vt: detecting voltage
Va: actively current-sharing signal
Vd: blood pressure lowering current-sharing signal
Vc: control signal
Vw: unloader signal
Detailed description of the invention
Some exemplary embodiments embodying this pattern characteristics and advantage will describe in the explanation of back segment in detail.It it should be understood that
This case can have various changes in different aspects, and it is all without departing from the scope of this case, and explanation therein and diagram
It is illustrated as in itself being used, and nand architecture is in limiting this case.
Referring to Fig. 1, it is active current-sharing and the power-supply system of blood pressure lowering current-sharing merging application of this case preferred embodiment
Block schematic diagram.As it is shown in figure 1, the power-supply system 1 of the present embodiment comprises a system load 10 and multiple power supply unit 11,
Plurality of power supply unit 11, such as two shown in Fig. 1 power supply unit 11, is connected in parallel with each other, and and system load
10 connect, and multiple power supply units 11 receive an input voltage (not shown), for example, alternating voltage of civil power, and by this input
Voltage is changed, and then respective output load current Io in the way of mean allocation is to system load 10, bears with drive system
Carry 10.In above-described embodiment, the output of multiple power supply units 11 can be but be not limited to identical.
In the present embodiment, each power supply unit 11 comprise power supply circuit 12, feedback circuit 13, one and/
Or control circuit 14, actively flow equalizing circuit 15, blood pressure lowering flow equalizing circuit 16 and a current-sensing circuit 17.Power supply supply electricity
Road 12 is connected with system load 10 via the outfan of power supply unit 11, and receives input voltage, and by inside at least
The on or off of one switch element (not shown) switches and is changed by input voltage, with output loading voltage Vo and load current
Io carrys out driving system loads 10.
Feedback circuit 13 is then connected with power supply circuit 12, and it exports feedback signal Vf to power supply circuit 12,
To change the dutycycle of the switch element in power supply circuit 12, and then adjust the value of load voltage Vo, wherein real in some
Executing in example, feedback signal Vf can be but be not limited to the change of the load voltage Vo of corresponding power supply circuit 12 and change, with this
The dutycycle of the switch element in adjustment power supply circuit 12, makes the load voltage Vo of power supply circuit 12 can maintain one
Rated voltage.
Current-sensing circuit 17 is connected with power supply circuit 12, and it is in order to detect the load current of power supply circuit 12
Io, and export according to this load current Io with this load current Io have a proportionate relationship one detecting voltage Vt.
Actively flow equalizing circuit 15 is connected with the outfan of current-sensing circuit 17, is passed by current-sensing circuit 17 to receive
The detecting voltage Vt come, and then learn the information of the load current Io of correspondence, additionally, actively flow equalizing circuit 15 is also by such as one
Bus (BUS) 18 and be connected with the active flow equalizing circuit 15 of other power supply unit 11, main to receive other via bus 18
Dynamic flow equalizing circuit 15 is transmitted the information of the load current Io about other power supply unit 11, what is more, actively flow equalizing circuit
15 have one first predeterminable current setpoint, and actively flow equalizing circuit 15 foundation detecting voltage Vt judge the load of correspondence
Whether electric current Io reaches more than the first current setpoint, to enter operating mode or operation stop mode accordingly, and when actively
When flow equalizing circuit 15 enters operating mode, actively flow equalizing circuit 15 is by the information according to corresponding load current Io, Yi Jigen
According to the information of the load current Io that other power supply unit 11 is exported, output accordingly one actively current-sharing signal Va, make with this
Power supply unit 11 in parallel in power-supply system 1 the most all can carry out mean allocation ground output load current Io to system by Flow Technique
Load 10.
Blood pressure lowering flow equalizing circuit 16 is connected with the outfan of current-sensing circuit 17, is passed by current-sensing circuit 17 to receive
The detecting voltage Vt come, and then learn the information of the load current Io of correspondence, additionally, blood pressure lowering flow equalizing circuit 16 has predeterminable
One second current setpoint, according to detecting voltage Vt, blood pressure lowering flow equalizing circuit 16 also judges whether the load current Io of correspondence reaches
More than second current setpoint, to enter operating mode or operation stop mode accordingly, and when blood pressure lowering flow equalizing circuit 16 enters
During operating mode, blood pressure lowering flow equalizing circuit 16 can export a blood pressure lowering current-sharing signal Vd when the value of corresponding load current Io increases,
Decline with the load voltage Vo that this drives corresponding power supply circuit 12, power supply unit 11 in parallel in making power-supply system 1
Mean allocation ground output load current Io can be carried out to system load 10 with the equal stream mode of blood pressure lowering.
And/or control circuit 14 is then connected with feedback circuit 13, actively flow equalizing circuit 15 and blood pressure lowering flow equalizing circuit 16, it can
Receive the active current-sharing signal Va that transmitted by active flow equalizing circuit 15 and/or blood pressure lowering current-sharing that blood pressure lowering flow equalizing circuit 16 is transmitted
Signal Vd, to export control signal Vc accordingly to feedback circuit 13, therefore control signal Vc actually can be with active current-sharing
Signal Va or blood pressure lowering current-sharing signal Vd has corresponding relation, it is possible to have with active current-sharing signal Va and blood pressure lowering current-sharing signal Vd simultaneously
Corresponding relation, therefore feedback signal Vf that feedback circuit 13 is exported not only can be according to the load voltage Vo's of power supply circuit 12
Change and corresponding change, it is possible to the corresponding change according to the change of control signal Vc, consequently, it is possible to control signal Vc just can be passed through
And adjust feedback signal Vf, make dutycycle correspondence feedback signal Vf of the switch element in power supply circuit 12 change, enter
And make multiple power supply units 11 of power-supply system 1 dynamically with the most all Flow Technique, the equal Flow Technique of blood pressure lowering or active all
The Flow Technique collocation equal Flow Technique of blood pressure lowering carrys out mean allocation ground output load current Io to system load 10.
Referring to Fig. 2 and coordinate Fig. 1, wherein Fig. 2 is voltage and the operation of electric current of the arbitrary power supply unit shown in Fig. 1
Curve chart.As shown in Figures 1 and 2, in some embodiments, the first current setpoint can be but be not limited to be set equal to correspondence
Power supply unit 11 rated current 0% time, and the second current setpoint can be but is not limited to be set equal to the electricity of correspondence
The rated current of source supply 11 100% time, namely load when reaching fully loaded (full load) equal to this power supply unit 11
The value of electric current Io.Additionally, when the active flow equalizing circuit 15 in each power supply unit 11 learns correspondence according to detecting voltage Vt
Load current Io less than the first current setpoint, namely the load current Io that the most corresponding power supply unit 11 is exported is low
When the 0% of the rated current of this power supply unit 11, this active flow equalizing circuit 15 enters operation stop mode, otherwise, when actively
Flow equalizing circuit 15 learns that according to detecting voltage Vt the load current Io that the power supply unit 11 of correspondence is exported has reached first
More than current setpoint, namely the load current Io that the most corresponding power supply unit 11 is exported has reached this power supply unit
The rated current of 11 more than 0% time, this active flow equalizing circuit 15 then enters operating mode, therefore in the present embodiment, works as power supply
After supply 11 comes into operation, actively flow equalizing circuit 15 is all maintained at operating mode.What is more, when each power supply unit 11
Interior blood pressure lowering flow equalizing circuit 16 learns that according to detecting voltage Vt the load current Io that the power supply unit 11 of correspondence is exported is low
Power supply unit 11 in the second current setpoint namely the most corresponding is the most fully loaded and load current Io supplies less than this power supply
Answer device 11 rated current 1 00% time, this blood pressure lowering flow equalizing circuit 16 enters operation stop mode, otherwise, when blood pressure lowering current-sharing electricity
Road 16 learns that according to detecting voltage Vt the load current Io that the power supply unit 11 of correspondence is exported has reached the second electric current and set
More than fixed point, namely the most corresponding power supply unit 11 has reached fully loaded above and that this power supply unit 11 is exported load electricity
When stream Io has reached more than the 100% of the rated current of this power supply unit 11, this blood pressure lowering flow equalizing circuit 16 then enters running mould
Formula.
From the foregoing, it will be observed that when the power-supply system 1 of the present embodiment not yet operates, due to the most multiple power supply units 11, institute is defeated
The load current Io gone out all less than this power supply unit 11 rated current 0%, namely less than the first current setpoint and the
Two current setpoint, therefore actively flow equalizing circuit 15 and blood pressure lowering flow equalizing circuit 16 all enter operation stop mode and do not work.
And when power-supply system 1 comes into operation, and when multiple power supply unit 11 is normal condition, if the most each power supply supplies
The load current Io answering device 11 to be exported has reached more than the 0% of the rated current of this power supply unit 11 but has not arrived specified electricity
Stream 100% time, blood pressure lowering flow equalizing circuit 16 will be maintained at operation stop mode, and so active flow equalizing circuit 15 but improves into running mould
Formula, and export actively current-sharing signal Va to and/or control circuit 14, make and/or the corresponding actively current-sharing signal Va of control circuit 14
And exporting control signal Vc to feedback circuit 13, feedback signal Vf making feedback circuit 13 be exported is right according to control signal Vc
Should change, the most multiple power supply units 11 will mean allocation ground output load current Io bears to system with the most all Flow Technique
Carry 10.
But when arbitrary power supply unit 11 of multiple power supply units 11 occurs abnormality, such as because of occur aging,
Output impedance contrast XOR inefficacy etc., cause cannot equalization of incidence equal-wattage to system load 10 time, there is the electricity of abnormality
Source supply 11 is in order to force output equal-wattage to system load 10, and its load current Io will rise, and if load current Io
Reach corresponding power supply unit 11 rated current more than 100%, namely when this power supply unit 11 is in overload,
Owing to now load current Io has reached more than the second electric current preset, therefore except active flow equalizing circuit 15 is the most persistently maintained at fortune
Operation mode, blood pressure lowering flow equalizing circuit 16 also into operating mode, and output buck current-sharing signal Vd to and/or control circuit 14, make
And/or the corresponding actively current-sharing signal Va and blood pressure lowering current-sharing signal Vd of control circuit 14 and export control signal Vc to feedback circuit
13, make feedback signal Vf corresponding change according to the change of control signal Vc that feedback circuit 13 is exported, make generation different with this
Often the output voltage Vo of the power supply unit 11 of state is begun to decline by such as 54V, to order about the power supply confession of other normal condition
Answer device 11 can export higher load current Io in a special time to system load 10, the mesh reaching to accelerate current-sharing with this
, the most multiple power supply units 11 will carry out mean allocation ground output loading electricity with the most all technology the equal Flow Technique of blood pressure lowering of arranging in pairs or groups
Stream Io is to system load 10.
From the foregoing, it will be observed that the load current Io that each power supply unit 11 worked as in power-supply system 1 is exported reaches this power supply
The rated current of supply 11 more than 0% and when not arriving the 100% of rated current, the active current-sharing of each power supply unit 11
Circuit 15 first starts, and with this, with the most all Flow Technique, output load current Io is to system load 10 with carrying out mean allocation, the most
Individual power supply unit 11 actually has preferably current-sharing effect because using the most equal Flow Technique, but once when there being arbitrary electricity
Source supply 11 occurs abnormality to be in overload conditions, and then exports the load current of reach rated current more than 100%
During Io, the blood pressure lowering flow equalizing circuit 16 of the power supply unit 11 of abnormality is occurred to restart, to reduce corresponding power supply supply
The output voltage Vo of device 11 so that it is the exportable higher load current Io of its power supply unit 11 and assist sharing system load 10
Demand, namely multiple power supply unit 11 now combines actively all Flow Technique and the equal Flow Technique of blood pressure lowering and reaches the mesh of current-sharing
, and owing to utilizing, there is the equal Flow Technique of blood pressure lowering reacting fast and being difficult to shake advantage, therefore multiple power supply unit 11 can be made to exist
Under conditions of arbitrary power supply unit 11 is in abnormality, remaining is in the power supply unit 11 of normal condition can be rapidly
Export higher load current Io to system load 10, namely maintain a certain proportion of shunting effect to provide in special time
Load current Io needed for system load 10, consequently, it is possible to the plurality of power supply unit 11 there are in fact the function of redundant,
Therefore power-supply system 1 is without being the most additionally arranged in parallel the power supply unit of at least one redundant, therefore electric energy loss can be reduced.
In some embodiments, as it is shown in figure 1, when power supply unit 11 has abnormality to be in overload conditions, with defeated
Go out to reach more than the 100% of rated current, namely reach the load current Io of more than the second current setpoint to system load 10,
And then ordering about blood pressure lowering flow equalizing circuit 16 when entering operating mode, this blood pressure lowering flow equalizing circuit 16 will export a unloading in time starting simultaneously
Signal Vw, to system load 10, to notify that system load 10 unloads in a special time, maintains multiple power supply to supply with this
Answer the main and necessary operating capability of device 11, consequently, it is possible to the reliability that will can improve power-supply system 1.
Referring to Fig. 3 and coordinate Fig. 1, wherein Fig. 3 is the thin portion circuit structure signal of the single power supply supply shown in Fig. 1
Figure.As it can be seen, in some embodiments, power supply circuit 12 comprises power-supply unit 120 and one first protection
Circuit 121, wherein power-supply unit 120 is connected with the first protection circuit 121, and its framework is in conversion input voltage, with output
Load voltage Vo and load current Io, the first protection circuit 121 then outfan with power supply unit 11 is connected, and via electricity
The outfan of source supply 11 and be connected (as shown in Figure 1) with system load 10, additionally, can for but be not limited to by diode institute structure
Becoming, load voltage Vo and the load current Io that power-supply unit 120 exports can be sent to the defeated of power supply unit 11 by it
Go out end, and can prevent backward current from being flowed in power supply unit 11 by the outfan of power supply unit 11.
Actively flow equalizing circuit 15 then comprise stable state switching circuit 151,1 second protection circuit 152, altogether order unit 153,
Partial pressure unit 154 and actively current-sharing feedback unit 155, wherein stable state switching circuit 151 is connected with the second protection circuit 152,
And be connected with the outfan of current-sensing circuit 17 and receive detecting voltage Vt, stable state switching circuit 151 is according to power supply unit
Whether 11 be in steady state operation and carry out on or off switching accordingly, wherein not yet enters stable state fortune when power supply unit 11
When making, stable state switching circuit 151 is cut-off state, otherwise, when power supply unit 11 is steady state operation, stable state switching circuit
151 will switch to conducting state, make detecting voltage Vt can be sent to the second protection electricity via the stable state switching circuit 151 of conducting
Road 152.Second protection circuit 152 order together unit 153 connects, and can be but be not limited to by a super diodes (super
Diodel) being constituted, detecting voltage Vt can be sent to common order unit 153 by the second protection circuit 152, and can prevent backward current
Internal to power supply unit 11 by common order unit 153 input.Order unit 153 is connected with bus 18 and partial pressure unit 154 altogether, its
Being total to of other power supply unit 11 can will be sent to via bus 18 by the detecting voltage Vt received by the second protection circuit 152
Order unit 153, also can receive via bus 18 simultaneously and be transmitted about other power supply unit 11 by other power supply unit 11
Load current Io information other detecting voltage Vt, and by other detecting voltage Vt be sent to partial pressure unit 154, as dividing potential drop
Unit 154 is then connected with active current-sharing feedback unit 155, common order unit 153 other transmitted can be detectd by partial pressure unit 154
Surveying voltage Vt and carry out dividing potential drop, actively current-sharing feedback unit 155 is then connected with current-sensing circuit 17, and it can be according to by current sense
Other detecting voltage Vt after detecting voltage Vt that circuit 17 is transmitted and the dividing potential drop that transmitted by partial pressure unit 154 and export
Actively current-sharing signal Va.
Refer to Fig. 4, the circuit structure signal of its power-supply system combination constituted by power-supply system as shown in Figure 1
Figure.As shown in Figure 4, power-supply system combination 4 comprises multiple power-supply system 1 as shown in Figure 1, such as three power-supply systems 1, and many
Individual power-supply system 1 is serially connected, and what is more, the inside of multiple power-supply systems 1 can be each but be not limited to have cable
(not shown), makes multiple power-supply system 1 can carry out transmission and the reception of electric power by connecting this cable each other.And this
In embodiment, the circuit framework within each power-supply system 1 is similar in appearance to the power-supply system 1 shown in Fig. 1, therefore by with identical mark
Number represent circuit structure with to make flowing mode identical, additionally, the active of the multiple power supply units within each power-supply system 1 is equal
Being also similar to shown in Fig. 1 and Fig. 2 as flowing mode of current circuit (this figure being not shown), namely bearing when each power supply unit 11
Carry electric current Io reached rated current more than 0% and not up to rated current 100% time, multiple power supply units 11 first start master
Move flow equalizing circuit 15 and carry out current-sharing with the most all Flow Technique, transship when arbitrary power supply unit 11 and make load current Io
When reaching rated current more than 100%, this power supply unit 11 will restart blood pressure lowering flow equalizing circuit 16, and then make multiple power supply supply
Device 11 carrys out current-sharing with the most all Flow Technique and the equal Flow Technique of blood pressure lowering.
In the present embodiment, each power-supply system 1 not only can provide electric energy to drive the system load 10 of inside, and each
Power-supply system 1 also can be linked up each other and learn the state of other power-supply systems 1, with when the system load 10 of arbitrary power-supply system 1
Loading demand promote, when causing this power-supply system 1 to be in overload conditions, other is in unloaded situation or the power supply of underloading situation
Multiple power supply units 11 in system 1 can export bigger load current Io immediately, provides extra electric energy extremely place with this
In the power-supply system 1 of overload conditions, share the power-supply system 1 being in heavy load condition with assistance, consequently, it is possible to multiple electricity can be made
The service life of origin system 1 extends, and increases reliability, and in above-described embodiment, each power-supply system 1 can be directly square
Formula transmits electric energy to other adjacent power-supply system 1 by cable, it is possible in an indirect way through other power-supply system 1
Cable and transmit electric energy to the non-adjacent power-supply system 1 connect, for example, when a certain power-supply system 1 is connected to two electricity
Time between origin system 1, then these two power-supply systems 1 are by indirectly by the power-supply system 1 being connected between two power-supply systems 1
Cable transmit electric energy each other to the other side.
The circuit framework power-supply system that another embodiment of this case is described with Fig. 5 combined below and start, so due to Fig. 5
Shown each first power supply unit in power-supply system combination and circuit framework all phases of each second source supply
It is similar to the power supply unit 11 shown in Fig. 3, therefore in Fig. 5, will no longer illustrate the first power supply unit and second source supply
Internal structure, so in order to it will be clearly understood that about Fig. 5 power-supply system combine technology, the electricity about Fig. 5 mentioned below
The first power supply unit in origin system combination and the internal circuit of second source supply, by directly with the electricity shown in Fig. 3
Title and the label of the circuit structure that source supply 11 is identical illustrate.Referring to Fig. 5, and coordinate Fig. 3, wherein Fig. 5 is this case
The electrical block diagram of the power-supply system combination of another preferred embodiment.As it can be seen, power-supply system combination 5 comprises multiple electricity
Origin system 50 and a power supply storehouse 51 (power bank), each of which power-supply system 50 comprises multiple the first electricity being connected in parallel
Source supply 500 and system load 10, the plurality of first power supply unit 500 receives input voltage, and by this input voltage
Change, so in the way of mean allocation respectively output load current Io (the first load current) to system load 10, with
Driving system loads 10.
Power supply storehouse 51 then electrically connects with multiple power-supply systems 50, and has multiple second source supply being connected in parallel
510, it is can to link up with multiple power-supply systems 50, and has the function of redundant, namely appointing when multiple power-supply systems 50
The loading demand of the system load 10 of one power-supply system 50 improves, such as, caused because this power-supply system 50 is abnormal, and make right
When this power-supply system 50 answered is in overload conditions, multiple second source supplies 510 by export respectively for redundant electric energy
Load current Io (the second load current), makes power supply storehouse 51 can provide redundant electric energy to the power-supply system being in overload conditions
50, to meet the demand of the system load 10 in the power-supply system 50 being in overload conditions.
In the present embodiment, the circuit structure of each first power supply unit 500 in each power-supply system 50 and part
Element to make flowing mode system similar to the power supply unit 11 shown in Fig. 3, repeat no more in this.
Although only the first current setpoint of the active flow equalizing circuit 15 of each first power supply unit 500 of the present embodiment
Being again set at being equal to the 0% of the rated current of the first corresponding power supply unit 500, the most actively flow equalizing circuit 15 but changes into working as
Learn according to detecting voltage Vt when the load current Io of correspondence has reached more than the first current setpoint, enter the mould that decommissions
Formula, additionally, the second current setpoint of the blood pressure lowering flow equalizing circuit 16 of the first power supply unit 500 then changes is set equal to correspondence
The 0% of the rated current of the first power supply unit 500, and blood pressure lowering flow equalizing circuit 16 also change into when according to detecting voltage Vt and learn
When corresponding load current Io has reached more than the second current setpoint, enter operating mode, it follows that when each power supply system
When system 50 comes into operation, the load current Io that each first power supply unit 500 in power-supply system 50 is exported is inevitable to be reached
To more than the 0% of the rated current of the first power supply unit 500, therefore the active current-sharing of the most each first power supply unit 500
Circuit 15 enters operation stop mode and inoperative, and blood pressure lowering flow equalizing circuit 16 then enters operating mode and continued operation, therefore
Actually after power-supply system 5 comes into operation, multiple parallel connections of power-supply system 5 first power supply unit 500 will respectively with
The equal Flow Technique of blood pressure lowering carrys out mean allocation ground output load current Io to system load 10.
Multiple second source supplies 510 as power supply storehouse 51 can receive input voltage, and carries out input voltage turning
Change, and then in the way of mean allocation, be each output as the load current Io of redundant electric energy, and each second source supply
The circuit structure of 510 and portion of element to make flowing mode similar to the power supply unit 11 shown in Fig. 3, repeat no more in this.
Only the first current setpoint of the active flow equalizing circuit 15 of each second source supply 510 of the present embodiment sets
For 0% of the rated current equal to corresponding second source supply 510, and actively flow equalizing circuit 15 is worked as according to detecting voltage Vt
And learn the load current Io of correspondence when having reached more than the first current setpoint, enter operating mode and continued operation, additionally,
Second current setpoint of the blood pressure lowering flow equalizing circuit 16 of second source supply 510 then changes the second source being set equal to correspondence
The 0% of the rated current of supply 510, and blood pressure lowering flow equalizing circuit 16 is when the load current learning correspondence according to detecting voltage Vt
When Io has reached more than the second current setpoint, enter operation stop mode, it follows that when coming into operation in power supply storehouse 51,
The load current Io that each second source supply 510 in power supply storehouse 51 is exported is inevitable has reached second source supply
More than the 0% of the rated current of 510, therefore the active flow equalizing circuit 15 of the most each second source supply 510 all enters running
Pattern and continued operation, blood pressure lowering flow equalizing circuit 16 then enters operation stop mode and inoperative, therefore need to carry when power supply storehouse 51
Second source supply multiple in parallel during for redundant electric energy to arbitrary power-supply system 50 with overload conditions, in power supply storehouse 51
510 are actually constituted, by exporting with carrying out mean allocation with actively all Flow Technique respectively, redundant electric energy that power supply storehouse 51 can be provided by
Load current Io.
Additionally, the power supply storehouse 51 of the present embodiment not only can provide redundant electricity when arbitrary power-supply system 1 is in overload conditions
Can be to this power-supply system 50, and power supply storehouse 51 also can be under full load conditions in multiple power-supply systems 50, it is provided that normal operation electricity
Can to power-supply system combine 5, make power-supply system combination 5 can by power supply storehouse 51 promote entirety outputs, for example,
When there is two power-supply systems 50 in power-supply system combination 5, if the power that each power-supply system 50 is provided that is 100 watts,
Then power supply storehouse 51 is in order to provide the redundant electric energy of two power-supply systems 50 simultaneously, and the output in this power supply storehouse 51 will be 200
Watt, and owing to power supply storehouse 51 is under full load conditions in multiple power-supply systems 50, it is possible to provide normal operation electric energy is to power supply system
System combination 5, the general power that power-supply system combination 5 therefore can be made to can be provided by reaches 400 watts, therefore allows power-supply system combine 5
Range is the most wide.
In sum, this case is power-supply system and the power-supply system group that a kind of active current-sharing and blood pressure lowering current-sharing merge application
Close, have actively flow equalizing circuit and blood pressure lowering flow equalizing circuit by the multiple power supply unit cordings in power-supply system, and the most equal
Current circuit and blood pressure lowering flow equalizing circuit can set startup according to actual demand, therefore can make the parallel power sources of power-supply system
Can flexibly use the merging application of the most all Flow Technique, the equal Flow Technique of blood pressure lowering or above two technology, also make power-supply system
Internal parallel power sources has the function of redundant, and can send unloader signal when arbitrary power supply unit exception
Notice system load unloading, therefore this power-supply system need not the most additionally arrange the power supply unit of redundant, be with power supply system
System not only can maintain high-reliability, it is possible to reduces unnecessary electric energy consume.
This case must be appointed by those skilled in the art execute craftsman think and be all as modify, the most de-such as attached claim
Be intended to protector.
Claims (19)
1. actively current-sharing and blood pressure lowering current-sharing merge a power-supply system for application, comprise:
One system load；And
Multiple power supply units, are connected in parallel with each other and are connected with this system load, exporting a load current respectively to this are
System load, this power supply unit of each of which has active flow equalizing circuit and a blood pressure lowering flow equalizing circuit, and this power supply each
This active flow equalizing circuit of supply whether reach one first current setpoint according to this load current and enter operating mode or
Operation stop mode, whether this blood pressure lowering flow equalizing circuit of this power supply unit each reaches one second electric current according to this load current
Set point and enter operating mode or operation stop mode so that this power supply unit each respectively with actively all Flow Technique and/
Or the equal Flow Technique of blood pressure lowering and mean allocation ground export this load current；
Wherein this first current setpoint be set equal to correspondence this power supply unit rated current 0%.
2. power-supply system as claimed in claim 1, wherein when this load current of this power supply unit is less than this first electric current
During set point, this active flow equalizing circuit enters operation stop mode, when this load current reaches more than this first current setpoint
Time, this active flow equalizing circuit enters operating mode, so that the plurality of power supply unit carrys out average mark with the most all Flow Technique respectively
Export this load current with joining.
3. power-supply system as claimed in claim 2, wherein this second current setpoint is set equal to this power supply confession of correspondence
The 100% of the rated current answered.
4. power-supply system as claimed in claim 3, wherein when this load current of this power supply unit is less than this second electric current
During set point, this blood pressure lowering flow equalizing circuit enters operation stop mode, when this load current reaches more than this second current setpoint
Time, this blood pressure lowering flow equalizing circuit enters operating mode, so that the plurality of power supply unit is respectively with the most all Flow Technique collocation blood pressure lowerings
All Flow Technique and mean allocation ground exports this load current.
5. power-supply system as claimed in claim 4, wherein when this blood pressure lowering flow equalizing circuit enters operating mode, this blood pressure lowering current-sharing
Circuit more exports a unloader signal to this system load, to notify that this system load unloads in a special time.
6. power-supply system as claimed in claim 1, this power supply unit of each of which comprises:
One power supply circuit, is connected with this system load, to export a load voltage and this load current；And
One feedback circuit, is connected with this power supply circuit, and it exports one according to this load voltage of this power supply circuit
Feedback signal, to this power supply circuit, makes this output voltage corresponding adjustment according to this feedback signal of this power supply circuit
It is maintained at a rated voltage.
7. power-supply system as claimed in claim 6, this power supply unit of each of which also comprises a current-sensing circuit, with this
Actively flow equalizing circuit and this blood pressure lowering flow equalizing circuit connect, and in order to produce a detecting voltage according to this load current, make this master
Dynamic flow equalizing circuit and this blood pressure lowering flow equalizing circuit learn the information of this load current by this detecting voltage.
8. power-supply system as claimed in claim 7, this active flow equalizing circuit of this power supply unit of each of which also has one
Stable state switching circuit, is connected with this current-sensing circuit, in order to whether to be in steady state operation and corresponding according to this power supply unit
Ground carries out on or off switching, with when this power supply unit is for steady state operation, makes this detecting voltage steady via this of conducting
State switching circuit and be sent to other this power supply unit.
9. power-supply system as claimed in claim 7, this power supply unit of each of which also has one and/or control circuit, with
This feedback circuit, this actively flow equalizing circuit and connection of this blood pressure lowering flow equalizing circuit, be somebody's turn to do and/or control circuit be for according to by this actively
The actively current-sharing signal and/or transmitted in operating mode by this blood pressure lowering flow equalizing circuit that flow equalizing circuit is transmitted in operating mode
A blood pressure lowering current-sharing signal and export one accordingly and control signal to this feedback circuit, make this feedback signal according to this control signal
And correspondence changes, so that each power supply unit mean allocation ground with the most all Flow Technique and/or blood pressure lowering equal Flow Technique respectively
Export this load current.
10. power-supply system as claimed in claim 1, in wherein this first current setpoint defaults in this active flow equalizing circuit,
This second current setpoint defaults in this blood pressure lowering flow equalizing circuit.
11. 1 kinds of actively current-sharing and power-supply system combinations of blood pressure lowering current-sharing merging application, comprise:
Multiple power-supply systems, are serially connected, and this power-supply system each has multiple power supply unit and a system load, should
Multiple power supply units are connected in parallel and are connected with this system load, to export a load current respectively to this system load, its
In this power supply unit each there is actively flow equalizing circuit and a blood pressure lowering flow equalizing circuit, and this power supply unit each should
Actively whether flow equalizing circuit reaches one first current setpoint according to this load current and enters operating mode or the mould that decommissions
Formula, whether this blood pressure lowering flow equalizing circuit of this power supply unit each reaches one second current setpoint according to this load current and enters
Enter operating mode or operation stop mode, make this power supply unit each respectively with the most all Flow Technique and/or blood pressure lowering current-sharing skill
Art and mean allocation ground export this load current to system load；
Wherein when this power-supply system arbitrary of the plurality of power-supply system is transshipped, remaining the plurality of power-supply system is underloading or sky
This power-supply system carried provides additional power to this power-supply system of overload.
12. power-supply system as claimed in claim 11 combinations, wherein this first current setpoint is set equal to being somebody's turn to do of correspondence
The 0% of the rated current of power supply unit.
13. power-supply systems as claimed in claim 12 combinations, wherein when this power supply unit this load current less than this
During one current setpoint, this active flow equalizing circuit enters operation stop mode, when this load current reaches this first current settings
When point is above, this active flow equalizing circuit enters operating mode, so that the plurality of power supply unit comes with the most all Flow Technique respectively
Mean allocation ground exports this load current.
14. power-supply system as claimed in claim 13 combinations, wherein this second current setpoint is set equal to being somebody's turn to do of correspondence
The 100% of the rated current of power supply unit.
15. power-supply systems as claimed in claim 14 combinations, wherein when this power supply unit this load current less than this
During two current setpoint, this blood pressure lowering flow equalizing circuit enters operation stop mode, when this load current reaches this second current settings
When point is above, this blood pressure lowering flow equalizing circuit enters operating mode, so that the plurality of power supply unit is taken with the most all Flow Technique respectively
Join the equal Flow Technique of blood pressure lowering and mean allocation export this load current.
16. 1 kinds of actively current-sharing and power-supply system combinations of blood pressure lowering current-sharing merging application, comprise:
Multiple power-supply systems, this power-supply system each has multiple first power supply unit and a system load, and the plurality of first
Power supply unit is connected in parallel and connects with this corresponding system load, to export a load current respectively to this system load；
And
One power supply storehouse, is connected with the plurality of power-supply system, and has the multiple second source supplies being connected in parallel, and is somebody's turn to do in arbitrary
During power-supply system overload, the plurality of second source supply exports a load current respectively, makes this power supply storehouse export by the plurality of
The redundant electric energy that this load current of second source supply output is constituted is to this power-supply system transshipped；
This first power supply unit of each of which and this second source supply each be respectively provided with one actively flow equalizing circuit and
One blood pressure lowering flow equalizing circuit, and this active flow equalizing circuit of this first power supply unit each and this second source supply each divides
Whether do not reach one first corresponding current setpoint according to this corresponding load current and enter operating mode or decommission
Pattern, this of this blood pressure lowering flow equalizing circuit foundation correspondence of this first power supply unit each and this second source supply each is born
Carry whether electric current reaches one second corresponding current setpoint and enter operating mode or operation stop mode so that each this
One power supply unit and this second source supply each average mark with the most all Flow Technique and/or blood pressure lowering equal Flow Technique respectively
Export this load current of correspondence with joining.
17. power-supply system as claimed in claim 16 combinations, are wherein supplied to this active current-sharing of this first power supply unit
Circuit differentiate this first current setpoint and be supplied to this first power supply unit this blood pressure lowering flow equalizing circuit differentiate should
Second current setpoint is respectively set as 0% of the rated current equal to this corresponding the first power supply unit, it is provided that give this
This first current setpoint that this active flow equalizing circuits of two power supply units differentiates and be supplied to this second source supply
This second current setpoint of differentiating of this blood pressure lowering flow equalizing circuit be respectively set as equal to this corresponding second source supply
The 0% of rated current.
18. power-supply system as claimed in claim 17 combinations, wherein come into operation when this first power supply unit each and make
This corresponding load current reaches to be supplied to this first current setpoint of this first power supply unit and this second current settings
When point is above, this active flow equalizing circuit of this first power supply unit enters operation stop mode, this first power supply unit
This blood pressure lowering flow equalizing circuit enters operating mode, so that the plurality of first power supply unit carrys out average mark with the equal Flow Technique of blood pressure lowering respectively
Export this load current with joining.
19. power-supply system as claimed in claim 17 combinations, wherein come into operation when this second source supply each and make
This corresponding load current reaches to be supplied to this first current setpoint of this second source supply and this second current settings
When point is above, this active flow equalizing circuit of this second source supply enters operating mode, this fall of this second source supply
Pressure flow equalizing circuit enters operation stop mode, so that the plurality of second source supply carrys out average mark with the most all Flow Technique respectively
Export this load current with joining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210288583.3A CN103595038B (en) | 2012-08-14 | 2012-08-14 | Actively current-sharing and blood pressure lowering current-sharing merge power-supply system and the power-supply system combination of application |
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| CN201210288583.3A CN103595038B (en) | 2012-08-14 | 2012-08-14 | Actively current-sharing and blood pressure lowering current-sharing merge power-supply system and the power-supply system combination of application |
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| CN103595038B true CN103595038B (en) | 2016-08-24 |
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| CN108733187A (en) * | 2017-04-17 | 2018-11-02 | 伊姆西Ip控股有限责任公司 | Method for balanced feeding electric current and the equipment for power supply |
| CN108880191B (en) * | 2017-05-15 | 2024-02-13 | 中兴通讯股份有限公司 | Power supply unit, power supply system and power supply method |
| TWI693770B (en) * | 2019-06-04 | 2020-05-11 | 明泰科技股份有限公司 | Power load-sharing system |
| CN112072917B (en) * | 2020-08-24 | 2021-11-16 | 苏州浪潮智能科技有限公司 | Multi-phase buck circuit current sharing method and device and computer readable storage medium |
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| EP1605571A1 (en) * | 2004-06-09 | 2005-12-14 | Micrel Incorporated | Device and method for load current sharing |
| CN101557107A (en) * | 2008-04-08 | 2009-10-14 | 致茂电子股份有限公司 | Current control and system monitoring device of module-type DC power supply system |
| CN102468685A (en) * | 2010-11-19 | 2012-05-23 | 中兴通讯股份有限公司 | Power supply system |
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| US6495995B2 (en) * | 2001-03-09 | 2002-12-17 | Semtech Corporation | Self-clocking multiphase power supply controller |
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|---|---|---|---|---|
| EP1605571A1 (en) * | 2004-06-09 | 2005-12-14 | Micrel Incorporated | Device and method for load current sharing |
| CN101557107A (en) * | 2008-04-08 | 2009-10-14 | 致茂电子股份有限公司 | Current control and system monitoring device of module-type DC power supply system |
| CN102468685A (en) * | 2010-11-19 | 2012-05-23 | 中兴通讯股份有限公司 | Power supply system |
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