CN105656306A - Modular current-equalizing three-loop control system and control method thereof - Google Patents
Modular current-equalizing three-loop control system and control method thereof Download PDFInfo
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Abstract
The invention relates to circuit feedback loop design, and discloses a modular current-equalizing three-loop control system and a control method thereof. The system comprises a voltage loop control module connected to a multi-phase DC-DC converter, a current loop control module connected to the multi-phase DC-DC converter and the voltage loop control module, and a current-equalizing loop control module including multiple current-equalizing sub modules, wherein each current-equalizing sub module is connected with a corresponding conversion branch, the current loop control module and the current-equalizing sub modules adjacent to the current-equalizing sub module, and each current-equalizing sub module includes a branch current sampler, a current-equalizing calculator and a current-equalizing loop compensator. By adopting a control mode combining voltage and current control, the response speed of the control system is increased. The current-equalizing sub modules can independently control the corresponding conversion branches in the multi-phase DC-DC converter. The complexity of the system is reduced, the reliability of the system is improved, and the system is of high scalability.
Description
Technical field
The present invention relates to the design of circuit feedback control loop, particularly one is applied to multi-phase DC-DC and turnsThree ring control system and control methods thereof of the modularization current-sharing of parallel operation.
Background technology
In the control circuit of multi-phase DC-DC converter, conventionally adopt at present under voltage mode controlFlow equalizing ring design. , control circuit comprises voltage control unit and flow equalizing ring control module, Control of VoltageUnit gathers the output voltage of multi-phase DC-DC converter to produce voltage compensation signal, flow equalizing ring controlThe voltage compensation signal that unit produces using voltage control unit is as benchmark and produce sharing control signal. SoAnd because the speed of Voltage Feedback is slower, multi-phase DC-DC converter usually cannot obtain anti-timelyFeedback is controlled.
And, the flow equalizing ring control module employing each branch current of calculating in tradition and all branch currentsThe error account form of the difference of absolute average. , the absolute average of all branch currents need to have oneIndividual center calculation subelement calculates. Therefore, when the number of branch road more, center calculation subelement negativeLotus is just larger, and the reliability of control circuit also can reduce, and, due to the load of center calculation subelementCapabilities limits number of branches be arrange, make the extensibility of control system also poor.
Summary of the invention
The object of the present invention is to provide a kind of three ring control system and control methods thereof of modularization current-sharing,The control model that adopts voltage to combine with electric current has improved the response speed of control system; And, each equalStream submodule has been realized the independent of each conversion branch road in multi-phase DC-DC converter has been controlled, and not only reducesSystem complex degree, and improved the reliability of system; Meanwhile, also make this system have betterExtensibility.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of three rings of modularization current-sharingControl system, is applied to three ring control systems of modularization current-sharing to control multi-phase DC-DC converter,Described multi-phase DC-DC converter comprises many conversion branch roads and is used to load supplying, a kind of modularizationThree ring control systems of current-sharing comprise: Voltage loop control module, is connected in described multi-phase DC-DC conversionDevice, described Voltage loop control module is according to load voltage Vout generation current reference signal VIref; Electric currentRing control module, is connected in described multi-phase DC-DC converter and described Voltage loop control module, described inCurrent loop control module is according to load current Iout and the compensation of described current reference signal VIref generation currentSignal VD; Flow equalizing ring control module, comprises multiple current-sharing submodules, and it is right that each current-sharing submodule is connected inThe conversion branch road of answering, described current loop control module and with this current-sharing submodule before and after adjacent two allStream submodule, each current-sharing submodule comprises branch current sampler, current-sharing calculator and flow equalizing ring compensator,Described branch current sampler receives the current branch current I of the conversion branch road of its correspondenceiTo produce currentRoad current sampling signal VIi, described current-sharing calculator before and after receiving, export by two adjacent current-sharing submodulesFront branch current sampled signal VIPWith rear branch current sampled signal VIN, and according to described current branch road electricityStream sampled signal VIi, described front branch current sampled signal VIPAnd described rear branch current sampled signal VINProduce branch road current-sharing error signal i, described flow equalizing ring compensator according to described current compensation signal VD withDescribed branch road current-sharing error signal i produces described duty cycle control signal Vti, to control turning of its correspondenceChange branch road.
Embodiments of the present invention also provide a kind of three ring control methods of modularization current-sharing, comprise: rootAccording to load voltage Vout generation current reference signal VIref; According to described load current Iout and described electricityStream reference signal VIref generation current compensating signal VD; According to the current branch current I of each conversion branch roadiProduce the current branch current sampled signal VI of each conversion branch roadi; According to the current branch road electricity of each conversion branch roadStream sampled signal VIi, with this conversion branch road before and after the front branch current sampled signal of adjacent two branch roadsVIPAnd rear branch current sampled signal VINProduce the branch road current-sharing error signal i of this conversion branch road; RootProduce corresponding to respectively according to the branch road current-sharing error signal i of each conversion branch road and described current compensation signal VDThe duty cycle control signal Vti of conversion branch road.
Embodiment of the present invention in terms of existing technologies, control by three rings of modularization current-sharing of the present inventionSystem comprises Voltage loop control module, current loop control module and flow equalizing ring control module. Flow equalizing ring controlModule comprises multiple current-sharing submodules, and each current-sharing submodule is connected in corresponding conversion branch road, described electric currentRing control module and two the current-sharing submodules adjacent with these current-sharing submodule front and back, each current-sharing submoduleComprise branch current sampler, current-sharing calculator and flow equalizing ring compensator. Modularization current-sharing of the present inventionThree encircle the control model that control systems adopt voltages to combine with electric current, have improved the response speed of control systemDegree, has realized multi-phase DC-DC converter FEEDBACK CONTROL fast and effectively. And, each current-sharing submodulePiece has substituted the center calculation module in system, and each branch road in multi-phase DC-DC converter has been realized solelyVertical control, has not only reduced system complex degree, and has improved the reliability of system; Meanwhile, also makeMust this system there is good extensibility.
Preferably, in three ring control systems of modularization current-sharing of the present invention, each current-sharing submodule also comprisesEnable unit, for enabling or this current-sharing submodule of forbidden energy. Thereby, can increase easily or reduceThe number of the conversion branch road of multi-phase DC-DC converter.
Brief description of the drawings
Fig. 1 is according to the square frame of three ring control systems of the modularization current-sharing of first embodiment of the inventionFigure;
Fig. 2 is according to the circuit of three ring control systems of the modularization current-sharing of first embodiment of the inventionFigure;
Fig. 3 is according to the closed connection layout of each current-sharing submodule of first embodiment of the invention;
Fig. 4 is according to the branch road current-sharing error signal of many conversion branch roads of first embodiment of the inventionThe schematic diagram of adjustment process;
Fig. 5 comprises according to the current-sharing submodule of second embodiment of the invention the schematic diagram that enables unit;
Fig. 6 (a) is for analyzing 2 the conversion branch roads that comprise of flow equalizing ring transfer function in the present inventionThe equalization equivalent model of DC-DC converter;
Fig. 6 (b) is for analyzing 2 the conversion branch roads that comprise of flow equalizing ring transfer function in the present inventionThe small signal equivalent model of DC-DC converter;
Fig. 7 is according to the square frame of the system transfer function of three ring control systems of modularization current-sharing of the present inventionFigure;
Fig. 8 is according to the flow process of three ring control methods of the modularization current-sharing of third embodiment of the inventionFigure.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to thisBright each embodiment is explained in detail. But, persons of ordinary skill in the art may appreciate thatIn the each embodiment of the present invention, in order to make reader understand the application better, many technology are proposed thinJoint. But, even without these ins and outs and the many variations based on following embodiment and amendment,Also can realize the each claim of the application technical scheme required for protection.
The first embodiment of the present invention relate to a kind of multi-phase DC-DC converter modularization current-sharing threeRing control system, please with reference to Fig. 1 and Fig. 2, three ring control systems 1 of modularization current-sharing comprise electricityPressure ring control module 10, current loop control module 11 and flow equalizing ring control module 12. Modularization current-sharingThree ring control systems 1 are connected in multi-phase DC-DC converter 2 so that multi-phase DC-DC converter 2 is carried outFEEDBACK CONTROL, multi-phase DC-DC converter 2 is used to load 3 to power, and wherein, load 3 comprises negativeCarry capacitor CloadWith load resistance Rload, load capacitance CloadThere is capacitor equivalent series resistance Resr. InIn present embodiment, multi-phase DC-DC converter 2 comprises N bar conversion branch road, respectively changes the defeated of branch roadGo out to hold the output that is joined together to form multi-phase DC-DC converter 2 to think load supplying, respectively conversionThe input of branch road connects input voltage vin by by-pass cock Kih, Kil. Each conversion branch road comprises stringA separate inductor Li and a resistance R oni that connection connects, wherein, resistance R oni has represented correspondingThe equivalent series resistance on road, i is the numbering of corresponding conversion branch road, i value is from 1 to N. But, thisInvention does not impose any restrictions this.
In present embodiment, Voltage loop control module 10 comprises voltage sample device 101 and mends with Voltage loopRepay device 102, Voltage loop compensator 102 is connected in voltage sample device 101. Particularly, voltage sample device101 have this first input end IN10-1, be connected in the output of multi-phase DC-DC converter 2. VoltageSampler 101 obtains load voltage Vout, and preferably, voltage sample device 101 obtains negative with certain proportionLive is pressed Vout. Voltage loop compensator 102 is connected in voltage sample device 101 to receive load voltage Vout.Voltage loop compensator 102 has the second input IN10-2With output OUT10-1, the second input IN10-2Be used for receiving a reference voltage Vref. Substantial, Voltage loop compensator 102 comprises operational amplifierOPVWith impedance ZV1、ZV2, Voltage loop compensator 102 is according to the compensating action of operational amplifier, to negativeLive presses Vout and reference voltage Vref to modulate with generation current reference signal VIref, and by defeatedGo out to hold OUT10-1Output.
In present embodiment, current loop control module 11 comprises load current sampler 111 and electric currentRing compensator 112, electric current loop compensator 112 is connected in load current sampler 111. Particularly, negativeCarry current sampler 111 and there is first input end IN11-1, be connected in the defeated of multi-phase DC-DC converter 2Go out end. Load current sampler 111 obtains load current Iout, and load current Iout is carried out suitablyThe sampling of ratio is to produce load current sampled signal VIout. Electric current loop compensator 112 is connected in load electricityStream sampler 111 is to receive this load current sampled signal VIout. Electric current loop compensator 112 has secondInput IN11-2With output OUT11-1, the second input IN11-2Be connected in receiver voltage ring compensator102 output OUT10-1With received current reference signal VIref. Substantial, electric current loop compensator112 comprise operational amplifier OPIWith impedance ZI1、ZI2, the benefit of the operational amplifier comprising according to its insideRepay effect, load current sampled signal VIout and current reference signal VIref are modulated to produce electricityStream compensating signal VD, and by output OUT11-1Output.
In present embodiment, flow equalizing ring control module 12 comprises multiple current-sharing submodules 121, Duo GejunStream submodule 121 corresponds respectively to many conversion branch roads in multi-phase DC-DC converter 2, and multipleBetween current-sharing submodule 121, be closed syndeton, as shown in Figure 3. Each current-sharing submodule 121 comprisesBranch current sampler 1211, current-sharing calculator 1212 and flow equalizing ring compensator 1213, current-sharing calculator1212 are connected between branch current sampler 1211 and flow equalizing ring compensator 1213.
Particularly, branch current sampler 1211 has first input end IN121-1, be connected in this current-sharingThe conversion branch road that submodule is corresponding. Branch current sampler 1211 obtains conversion branch road current of its connectionBranch current IiTo produce the current branch current sampled signal VI of this conversion branch roadi。
Current-sharing calculator 1212 is connected in branch current sampler 1211 to receive the current of this conversion branch roadBranch current sampled signal VIi. Current-sharing calculator 1212 has the second input IN121-2, the 3rd inputEnd IN121-3, the first output OUT121-1, the second output OUT121-2, wherein, the first outputOUT121-1, the second output OUT121-2Two current-sharing submodules adjacent before and after being connected to are with outputThe current branch current sampled signal VI of this conversion branch roadi, the second input IN121-2, the 3rd inputIN121-3Two current-sharing submodules adjacent before and after being connected to are with two conversions adjacent before and after receivingThe current sampling signal on road, i.e. front branch current sampled signal VIP, rear branch current sampled signal VIN。Current-sharing calculator 1212 is according to current branch current sampled signal VIi, front branch current sampled signal VIPAnd rear branch current sampled signal VINProduce branch road current-sharing error signal i, wherein ε i=VIi-(VIP+VIN)/2。
Fig. 4 is according to the adjusting of the branch road current-sharing error signal i of many conversion branch roads of present embodimentThe schematic diagram of journey, wherein N=5, but the present invention does not impose any restrictions this. It should be noted that, byThat the equal proportion of the current value that obtains of sampling is zoomed in or out in current sampling signal VIi, therefore, electricityThe relative variation of stream sampled signal VIi can represent each branch current IiRelative variation.
As shown in Figure 4, taking the first branch road as example: current branch current sampled signal VI1 is 3, before itBranch current sampled signal VI5 is 2, and branch current sampled signal VI2 is 6 thereafter, therefore the first branch roadThe current sampling signal mean value of adjacent legs be 4. At next adjustment cycle, due to the first branch roadCurrent sampling signal be less than the current sampling signal mean value of adjacent legs, the branch road electricity of its first branch roadStream sampled signal will be by compensation to increase and to 4 convergences gradually. All the other change branch roads by that analogy, electricityStream sampled signal all by the current sampling signal mean value using adjacent legs as benchmark, adjust. SeeExamine the branch current sampled signal that each conversion branch road is adjusted after one-period, can find: each conversionBranch current sampled signal after the adjustment of road becomes on the whole more than the branch current sampled signal before adjustingBe bordering on the absolute average VIavg of current sampling signal. If continue this method of adjustment, divide through convergenceAnalyse known: after some adjustment cycles, the branch road sampled signal of respectively changing branch road will equal current sample letterNumber absolute average VIavg, can reach the result identical with traditional current-sharing mode.
Flow equalizing ring compensator 1213 is connected in current-sharing calculator 1212 with receiving branch current-sharing error signal i.Flow equalizing ring compensator 121 has four-input terminal IN121-4With the 3rd output OUT121-3, the 4th inputEnd IN121-4Be connected in the output OUT of electric current loop compensator 11211-1With received current compensating signal VD.Substantial, flow equalizing ring compensator 1213 comprises operational amplifier OPCSiWith impedance Zcsi1、Zcsi2, allStream ring compensator 1213 produces current-sharing bucking voltage Vdi according to branch road current-sharing error signal i, and according to electricityStream compensating signal VD and current-sharing bucking voltage Vdi produce duty cycle control signal Vti, whereinVti＝VD-Vdi。
Further, three of the modularization current-sharing of present embodiment ring control systems 1 also comprise multiple trianglesRipple signal comparator 13, each triangular signal comparator 13 is connected in corresponding current-sharing submodule with correspondingConversion branch road between, triangular signal comparator 13 is connected in flow equalizing ring compensator 1213 and conversionBetween the input of branch road. Particularly, triangular signal comparator 13 have triangular wave input pin withInput triangular signal Vtrii, wherein, triangular signal Vtrii at Vtri1 between VtriN, each otherThere is the phase difference (N is the number of conversion branch road) of 2 π/N. Triangular signal comparator 13 will receiveTo duty cycle control signal Vti and triangular signal Vtrii compare, to obtain thering are 2 π/N phaseThe square wave control signal of potential difference. The party's wave control signal be used for controlling conversion branch road by-pass cock Kih,Kil opens or closes, thereby realizes the FEEDBACK CONTROL to conversion branch road.
The second embodiment of the present invention relates to a kind of three ring control systems of modularization current-sharing. Second implementsMode and the first embodiment are roughly the same, and main distinction part is: in second embodiment of the inventionIn, as shown in Figure 5, each current-sharing submodule 121 also comprises and enables unit 1215, for enabling or forbidden energyThis current-sharing submodule. Particularly, enable unit 1215 and comprise four enable switch Keni and controller(scheming not formula), four enable switch Keni are arranged at respectively the second input of each current-sharing submodule 121IN121-2, the 3rd input IN121-3, the first output OUT121-1, the second output OUT121-2. ControlDevice processed is used for providing enable signal Eni to four enable switch Keni. When three rings of modularization current-sharing are controlledWhen system 1 need to deduct a current-sharing submodule, enable signal Eni is set to 0, this current-sharing submodule121 by short circuit, and this current-sharing submodule 121 no longer provides this branch road electricity to two adjacent current-sharing submodulesStream sampled signal VIiThereby,, its two adjacent current-sharing submodules will directly couple together; Work as modularizationWhen three ring control systems 1 of current-sharing need to add a current-sharing submodule, enable signal Eni is put to 1,This current-sharing submodule starts to send current branch current sampled signal to two adjacent current-sharing submodulesVIi, and receive front branch current sampled signal VIP and the described rear branch road of two adjacent current-sharing submodulesCurrent sampling signal VIN. Thereby three ring control systems of the modularization current-sharing of present embodiment can be squareJust increase and decrease conversion branch road changes its course to realize.
Above two embodiments are described three rings of modularization current-sharing provided by the present invention in detail and are controlledThe particular circuit configurations of system. The following is the loop stability of the three ring control systems to modularization current-sharingAnalyze design.
Suppose in N bar conversion branch road wherein have the electric current of a conversion branch road to change branch road not with all the otherWith, its electric current will be to all the other N-1 bar conversion branch road shuntings, and therefore the circulation patterns of loop is a lot.For simplified design, and take into account the theory of the adjacent conversion branch current of control of this invention, in design, only examineConsider the circulation patterns of adjacent conversion branch road. Change branch road into example, the equalization equivalent model of system with twoAs shown in Fig. 6 (a). The control of current-sharing loop can not make load output change, and the loop of load output is anti-Feedback is only determined by voltage loop and current loop. In the time analyzing current-sharing loop, suppose voltage loop and electric currentLoop is in stable state, the current compensation signal VD of current loop stable output, current compensation signalVD by with the comparison of triangular signal, obtain identical dutycycle at the input of two conversion branch roadsD. For the adjustment that ensures current-sharing loop does not change to load output, in two conversion branch roads forControl the dutycycle d of equal flow valuve, (the dutycycle d that controls equal flow valuve can be by all will only to produce difference componentStream bucking voltage Vdi and triangular signal Vtrii relatively draw). In sum, at two conversion branch roadsInput both end voltage value be respectively (D+d) Vin and (D-d) Vin. Under flow equalizing ring small-signal analysis,Because the dutycycle D of voltage loop and current loop control generation remains unchanged, load output value does not occurChange. The small signal equivalent model of system is as shown in Fig. 6 (b), and wherein, output head grounding, changes and prop upIn road, only contain current-sharing loop current. Suppose Ron1＝Ron2＝Ron, circuit expressions formula is as follows:
Through Laplace transform, above formula subtracts following formula and can obtain:
2d(s)×Vin＝2Ron×i(s)+2L×s×i(s)(2)
Through abbreviation, can obtain current-sharing loop transfer function:
Current-sharing loop transfer function is a first-order system with first order pole. Be illustrated in figure 7 modularization current-sharingThe block diagram of system transfer function of three ring control systems, TVRepresentative voltage loop, TiRepresent that electric current returnsRoad, TCSRepresent equalized current circuit, Kv representative voltage sampler (being 101 in Fig. 1), Ki represents electricityStream sampler (being 111 in Fig. 1), the transfer function of Gcv (S) representative voltage compensator, Gci(S) represent the transfer function of current compensator, Gcs (S) represents the transfer function of flow equalizing ring compensator,Hv (S) representative voltage loop transfer function, Hi (S) represents current loop transfer function, Hcs (S)Represent current-sharing loop transfer function. Wherein, the transfer function open loop expression formula in three loops is respectively:
Ti(s)＝Ki·GCi(s)·Hi(s)(4)
TCS(s)＝GCS(s)·HCS(s)(6)
In order to ensure the stability of system, avoid producing and disturbing between control loop, in Bode diagram, respectively openThe cross-over frequency at zero point of ring transfer function is following regulation: fSW>fTi>fTV>fCS. Wherein, fSWFor switch lockRate, fTiFor the Bode diagram zero crossing cut-off frequency of current loop transfer function (formula 4), fTV is electricityThe Bode diagram zero crossing cut-off frequency of pressure ring road transfer function (formula 5), fCSFor current-sharing loop shifts letterThe Bode diagram zero crossing cut-off frequency of number (formula 6). Under this regulation, the zero crossing of current loop cutsOnly frequency is the highest, has ensured the quick response of load to current signal; The cross-over frequency of current-sharing loop is minimum,Therefore in current-sharing process, by by reaching stable state a long transit time. So setEnsured voltage circuit and the current loop response speed to system output, can make again to reach in systemDuring to stable state, electric current is uniformly distributed each conversion branch road.
It is worth mentioning that, each module involved in present embodiment is logic module, in realityIn application, a logical block can be a physical location, can be also an of physical locationPoint, can also realize with the combination of multiple physical locations. In addition, for outstanding innovation part of the present invention,In present embodiment, do not have the unit not too close with solving technical problem relation proposed by the inventionIntroduce, but this does not show not exist in present embodiment other unit.
Third embodiment of the invention relates to a kind of three ring control methods of modularization current-sharing, is applied to moduleChange three ring control systems of current-sharing to control multi-phase DC-DC converter, multi-phase DC-DC converter comprisesMany conversion branch roads and be used to load supplying. As shown in Figure 8, the modularization current-sharing of present embodimentThree ring control methods comprise step S1 to step S6.
Step S1: according to load voltage Vout generation current reference signal VIref.
Step S2: according to load current Iout and current reference signal VIref generation current compensating signal VD.
Step S3: according to the current branch current I of each conversion branch roadiProduce the current branch road of each conversion branch roadCurrent sampling signal VIi。
Step S4: according to the current branch current sampled signal VI of each conversion branch roadi, with this conversion branch roadBefore and after the front branch current sampled signal VI of adjacent two branch roadsPAnd rear branch current sampled signalVINProduce the branch road current-sharing error signal i of this conversion branch road.
Step S5: according to branch road current-sharing error signal i and the described current compensation signal of each conversion branch roadVD produces the duty cycle control signal Vti corresponding to each conversion branch road.
Step S6: corresponding duty cycle control signal Vti produces each conversion branch road pair according to each conversion branch roadThe square wave control signal of answering, to control corresponding conversion branch road.
The step of the whole bag of tricks is divided above, just in order to be described clearly, can merge into one while realizationStep or some step is split, is decomposed into multiple steps, as long as comprise identical logical relation,All in the protection domain of this patent; To adding inessential amendment in algorithm or in flow process or drawingEnter inessential design, but the core design that does not change its algorithm and flow process is all at the protection model of this patentIn enclosing.
Be not difficult to find, present embodiment is the embodiment of the method corresponding with first, second embodiment,Present embodiment can with the enforcement of working in coordination of first, second embodiment. In first, second embodimentThe correlation technique details of mentioning is still effective in the present embodiment, in order to reduce repetition, no longer superfluous hereState. Correspondingly, the correlation technique details of mentioning in present embodiment also can be applicable to first, second enforcementIn mode.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above be realize of the present invention concreteEmbodiment, and in actual applications, can do various changes to it in the form and details, and not inclined to one sideFrom the spirit and scope of the present invention.
Claims (9)
1. three of modularization current-sharing ring control systems, are applied to multi-phase DC-DC converter, described inMulti-phase DC-DC converter comprises many conversion branch roads and is used to load supplying, it is characterized in that instituteThe three ring control systems of stating modularization current-sharing comprise:
Voltage loop control module, is connected in described multi-phase DC-DC converter, described Voltage loop control mouldPiece is according to load voltage Vout generation current reference signal VIref;
Current loop control module, is connected in described multi-phase DC-DC converter and described Voltage loop control mouldPiece, described current loop control module produces according to load current Iout and described current reference signal VIrefCurrent compensation signal VD;
Flow equalizing ring control module, comprises multiple current-sharing submodules, and each current-sharing submodule is connected in corresponding turningChange branch road, described current loop control module and two the current-sharing submodules adjacent with these current-sharing submodule front and backPiece, each current-sharing submodule comprises branch current sampler, current-sharing calculator and flow equalizing ring compensator, described inBranch current sampler receives the current branch current I of the conversion branch road of its correspondenceiTo produce current branch roadCurrent sampling signal VIi, described current-sharing calculator before and after receiving, export by two adjacent current-sharing submodulesFront branch current sampled signal VIPWith rear branch current sampled signal VIN, and according to described current branch roadCurrent sampling signal VIi, described front branch current sampled signal VIPAnd described rear branch current sampled signalVINProduce branch road current-sharing error signal i, described flow equalizing ring compensator is according to described current compensation signal VDProduce described duty cycle control signal Vti with described branch road current-sharing error signal i, to control its correspondenceConversion branch road.
2. three of modularization current-sharing according to claim 1 ring control systems, is characterized in that,The expression formula of described branch road current-sharing error signal i is: ε i=VIi-(VIP+VIN)/2。
3. three of modularization current-sharing according to claim 1 ring control systems, is characterized in that,Described flow equalizing ring compensator produces current-sharing bucking voltage Vdi, institute according to described branch road current-sharing error signal iThe expression formula of stating duty cycle control signal Vti is: Vti=VD-Vdi.
4. three of modularization current-sharing according to claim 1 ring control systems, is characterized in that,Each current-sharing submodule also comprises and enables unit, for enabling or this current-sharing submodule of forbidden energy.
5. three of modularization current-sharing according to claim 1 ring control systems, is characterized in that,Also comprise multiple triangular signal comparators, each triangular signal comparator is connected in corresponding current-sharing submoduleBetween piece and corresponding conversion branch road, described triangular signal produces according to described duty cycle control signal VtiRaw square wave control signal is to control corresponding conversion branch road.
6. three of modularization current-sharing according to claim 1 ring control systems, is characterized in that,Described current loop control module comprises load current sampler and electric current loop compensator, and described load current is adoptedSample device produces load current sampled signal VIout according to described load current Iout, described electric current loop compensationDevice produces described electricity according to described load current sampled signal VIout and described current reference signal VIrefStream compensating signal VD.
7. three of modularization current-sharing according to claim 1 ring control systems, is characterized in that,Described Voltage loop control module comprises voltage sample device and Voltage loop compensator, and described voltage sample device obtainsDescribed load voltage Vout, described Voltage loop compensator is for producing institute according to described load voltage VoutState current reference signal VIref.
8. three of modularization current-sharing ring control methods, three rings that are applied to modularization current-sharing are controlled systemSystem with control multi-phase DC-DC converter, described multi-phase DC-DC converter comprise many conversion branch roads andBe used to load supplying, it is characterized in that, comprise following steps:
According to load voltage Vout generation current reference signal VIref;
According to described load current Iout and described current reference signal VIref generation current compensating signalVD；
According to the current branch current I of each conversion branch roadiThe current branch current that produces each conversion branch road is adoptedSample signal VIi；
According to the current branch current sampled signal VI of each conversion branch roadi, with this conversion branch road before and after adjacentThe front branch current sampled signal VI of two branch roadsPAnd rear branch current sampled signal VINProducing shouldThe branch road current-sharing error signal i of conversion branch road;
Right according to the branch road current-sharing error signal i of each conversion branch road and described current compensation signal VD generationShould be in the duty cycle control signal Vti of each conversion branch road.
9. three of modularization current-sharing according to claim 8 ring control methods, is characterized in that,Produce according to the branch road current-sharing error signal i of each conversion branch road and described current compensation signal VD in stepAfter duty cycle control signal Vti, also comprise:
Produce square wave corresponding to each conversion branch road according to duty cycle control signal Vti corresponding to each conversion branch roadControl signal, to control corresponding conversion branch road.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6534960B1 (en) * | 2002-06-18 | 2003-03-18 | Texas Instruments Incorporated | Multi-channel interleaved power converter with current sharing |
| CN1645727A (en) * | 1999-09-01 | 2005-07-27 | 英特赛尔公司 | Multi-phase converter with balanced currents |
| US20100315047A1 (en) * | 2009-06-16 | 2010-12-16 | Chia-Ning Ni | Control Device for a Multi-phase DC-DC Converter and Related Multi-phase DC-DC Converter |
| CN102201735A (en) * | 2010-03-26 | 2011-09-28 | 英特赛尔美国股份有限公司 | Multiple phase switching regulator with phase current sharing |
-
2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645727A (en) * | 1999-09-01 | 2005-07-27 | 英特赛尔公司 | Multi-phase converter with balanced currents |
| US6534960B1 (en) * | 2002-06-18 | 2003-03-18 | Texas Instruments Incorporated | Multi-channel interleaved power converter with current sharing |
| US20100315047A1 (en) * | 2009-06-16 | 2010-12-16 | Chia-Ning Ni | Control Device for a Multi-phase DC-DC Converter and Related Multi-phase DC-DC Converter |
| CN102201735A (en) * | 2010-03-26 | 2011-09-28 | 英特赛尔美国股份有限公司 | Multiple phase switching regulator with phase current sharing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637960A (en) * | 2016-12-30 | 2017-05-10 | 东华大学 | Durable flame-retardant finish method for cotton fabric based on ultraviolet light curing reaction |
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| CN105656306B (en) | 2018-11-20 |
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