CN105591536A - Interlaced PFC circuit control method and interlaced PFC circuit control device - Google Patents
Interlaced PFC circuit control method and interlaced PFC circuit control device Download PDFInfo
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- CN105591536A CN105591536A CN201610099161.XA CN201610099161A CN105591536A CN 105591536 A CN105591536 A CN 105591536A CN 201610099161 A CN201610099161 A CN 201610099161A CN 105591536 A CN105591536 A CN 105591536A
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- branch road
- parafacies
- pfc circuit
- state information
- work state
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an interlaced PFC circuit control method and an interlaced PFC circuit control device. The interlaced PFC circuit control method is characterized in that a response to a triggered PFC circuit starting instruction can be provided, and auxiliary phase branch operation state parameters of the PFC circuit can be acquired to determine auxiliary phase branch working state information; main phase branch operation state parameters of the PFC circuit can be acquired to determine main phase branch working state information; a corresponding preset strategy can be invoked to control the operation of the interlaced PFC circuit according to the determined auxiliary phase branch working state information and the main phase branch working state information. The problem of the abnormal working state of the PFC caused by the inability of detecting the faults of the branches during the engineering process of the interlaced PFC circuit of the prior art can be solved, and the working stability of the PFC circuit can be provided, and the safety of the application device can be improved.
Description
Technical field
The present invention relates to pfc circuit control technology field, in particular to a kind of alternating expressionPfc circuit control method and device.
Background technology
At present the main circuit of the interleaved PFC on transducer air conditioning as shown in Figure 1, by two-wayBOOST inductive branch composition. Generally main circuit is divided into major-minor two phase controls, is respectively by electricityThe principal phase that sense L1, switching tube Q1, diode D1, resistance R S1 device form and be respectively byThe parafacies composition that inductance L 2, switching tube Q2, diode D2, resistance R S2 device form.
In existing interleaved PFC circuit, two-way inductive branch in use can't carry outCorresponding testing, testing normally just can be carried out artificially in specific maintenance periodDetect. But, if in use branch road also may break down, once a certainBreaking down in road, can make whole PFC work in abnormality, and what extremely affect transducer air conditioning canBy property, cause supply harmonic to disturb abnormal, easily there is abnormal protection in complete machine, affects normal workDo.
For cannot detection branch occurring event in interleaved PFC circuit engineering process in correlation techniqueBarrier, may cause PFC to work in abnormal problem, not yet proposes at present solution effectively.
Summary of the invention
The invention provides a kind of interleaved PFC circuit control method and device, existing at least to solveHave in technology and cannot detection branch break down in interleaved PFC circuit engineering process, may causePFC works in abnormal problem.
For solving the problems of the technologies described above, according to disclosure embodiment aspect, the present invention carriesSupplied a kind of interleaved PFC circuit control method, the method comprises: in response to the PFC triggeringCircuit open command, obtains the parafacies branch road running state parameters of pfc circuit, to determine parafaciesBranch road work state information; Obtain the principal phase branch road running state parameters of pfc circuit, to determinePrincipal phase branch road work state information; Prop up according to definite parafacies branch road work state information and principal phaseThe work state information on road, the operation of calling corresponding preset strategy control interleaved PFC circuit.
Further, obtain the parafacies branch road running state parameters of pfc circuit, to determine parafaciesBranch road work state information, comprising: judge whether to meet pfc circuit unlocking condition; If meet,Obtain the circuit parameter before pfc circuit is opened; Open the parafacies branch road of pfc circuit, call theOne default self-inspection logic is determined parafacies branch road work state information.
Further, judge whether to meet pfc circuit unlocking condition, comprising: judge PFC electricityWhether road median generatrix voltage is less than alternating current crest voltage; If be less than, judge pfc circuit unlatchingWhether instruction triggers for the first time; If so, judge and meet pfc circuit unlocking condition.
Further, the circuit parameter before the pfc circuit obtaining is opened comprises: busbar voltage,Call the first default self-inspection logic and determine parafacies branch road work state information, comprising: judge busWhether voltage is more than or equal to the first voltage threshold; If so, call the first default self-inspection logic rootDetermine parafacies branch road work state information according to the variable quantity of busbar voltage.
Further, calling the first default self-inspection logic determines secondary according to the variable quantity of busbar voltagePhase branch road work state information, comprising: busbar voltage is raise, heighten pfc circuit output electricityThe pressure value upper limit; Detect busbar voltage rising value in very first time threshold value and whether exceed second voltageThreshold value; If so, determine that parafacies branch road work state information is normal, otherwise, determine that parafacies props upRoad work state information is abnormal.
Further, the circuit parameter before the pfc circuit obtaining is opened comprises: busbar voltage,Call the first default self-inspection logic and determine parafacies branch road work state information, comprising: judge busWhether voltage is more than or equal to the first voltage threshold; If not, call the first default self-inspection logicDetermine parafacies branch road work state information according to the current change quantity of parafacies branch road.
Further, call the first default self-inspection logic true according to the current change quantity of parafacies branch roadDetermine parafacies branch road work state information, comprising: open second o'clock at the parafacies branch road of pfc circuitBetween after threshold value, judge whether the electric current of parafacies branch road in the 3rd time threshold is greater than predetermined currentThreshold value; If so, determine that parafacies branch road work state information is normal, otherwise, determine that parafacies props upRoad work state information is abnormal.
Further, obtain the principal phase branch road running state parameters of pfc circuit, to determine principal phaseBranch road work state information, comprising: the principal phase branch road of opening pfc circuit; At the 4th time thresholdAfter value, close the parafacies branch road of pfc circuit; Call the second default self-inspection logic and determine that principal phase props upRoad work state information.
Further, the circuit parameter before the pfc circuit obtaining is opened comprises: busbar voltage,Call the second default self-inspection logic and determine principal phase branch road work state information, comprising: at the 5th o'clockBetween after threshold value, judge compared with the busbar voltage of obtaining before current busbar voltage is opened with pfc circuit,Whether exceed tertiary voltage threshold value; If so, determine that principal phase branch road work state information is normal,Otherwise, determine that principal phase branch road work state information is for abnormal.
Further, according to the work of definite parafacies branch road work state information and principal phase branch roadStatus information, the operation of calling corresponding preset strategy control interleaved PFC circuit, comprising: sentenceWhether the work state information of disconnected parafacies branch road work state information and principal phase branch road is extremely;If so, send PFC operation troubles information.
Further, according to the work of definite parafacies branch road work state information and principal phase branch roadStatus information, the operation of calling corresponding preset strategy control interleaved PFC circuit, comprising: sentenceWhether the work state information of disconnected whether parafacies branch road work state information or principal phase branch road is differentOften; If so, judge currently whether in detecting pattern, if in detecting pattern, send PFCOperation troubles information, if not in detecting pattern, it is normal corresponding opening work state informationBranch road, and control pfc circuit under default environmental condition time, restriction correction motion power.
According to disclosure embodiment on the other hand, provide the control of a kind of interleaved PFC circuitDevice, this device comprises: the first determining unit, open for the pfc circuit in response to triggeringInstruction, obtains the parafacies branch road running state parameters of pfc circuit, to determine the work of parafacies branch roadStatus information; The second determining unit, for obtaining the principal phase branch road running status ginseng of pfc circuitAmount, to determine principal phase branch road work state information; Control module, for according to definite parafaciesThe work state information of branch road work state information and principal phase branch road, calls corresponding preset strategy controlThe operation of interleaved PFC circuit processed.
Further, the first determining unit comprises: the first judge module is full for judging whetherFoot pfc circuit unlocking condition; The first acquisition module, in the first judge module judged resultWhen meeting, obtain the circuit parameter before pfc circuit is opened; The first determination module, for openingOpen the parafacies branch road of pfc circuit, call the first default self-inspection logic and determine parafacies branch road work shapeState information.
Further, the first judge module comprises: the first judgment sub-unit, and for judging PFCWhether circuit median generatrix voltage is less than alternating current crest voltage; The second judgment sub-unit, forThe first judgment sub-unit judged result when being less than, judges pfc circuit open command whether firstInferior triggering; The 3rd judgment sub-unit, in the second judgment sub-unit judged result when being,Judge and meet pfc circuit unlocking condition.
Further, the circuit parameter before the pfc circuit that the first acquisition module obtains is opened comprises:Busbar voltage, the first determination module comprises: the 4th judgment sub-unit, for judging busbar voltageWhether be more than or equal to the first voltage threshold; First determines subelement, for sub in the 4th judgementUnit judges result when being, is called the first default self-inspection logic according to the variable quantity of busbar voltageDetermine parafacies branch road work state information.
Further, first determines that subelement comprises: voltage rising submodule, and for by busVoltage raises, and heightens the pfc circuit output voltage values upper limit; First judges submodule, for inspectionSurvey busbar voltage rising value in very first time threshold value and whether exceed second voltage threshold value; First is trueStator modules, in the time that the first judgement submodule is judged as YES, determines parafacies branch road work shapeState information is normal, otherwise, determine that parafacies branch road work state information is for abnormal.
Further, the circuit parameter before the pfc circuit that the first acquisition module obtains is opened comprises:Busbar voltage, the first determination module comprises: the 5th judgment sub-unit, for judging busbar voltageWhether be more than or equal to the first voltage threshold; Second determines subelement, for sub in the 5th judgementUnit judges result when not being, is called the first default self-inspection logic according to the electric current of parafacies branch roadVariable quantity is determined parafacies branch road work state information.
Further, second determines that subelement comprises: second judges submodule, at PFCThe parafacies branch road of circuit is opened after the second time threshold, judges that parafacies props up in the 3rd time thresholdWhether the electric current on road is greater than predetermined current threshold value; Second determines submodule, in the second judgementWhen submodule is judged as YES, determine that parafacies branch road work state information is for normal, otherwise, determineParafacies branch road work state information is abnormal.
Further, the second determining unit comprises: opening module, and for opening pfc circuitPrincipal phase branch road; Closing module, for after the 4th time threshold, closes the parafacies of pfc circuitBranch road; The second determination module, determines the work of principal phase branch road for calling the second default self-inspection logicStatus information.
Further, the circuit parameter before the pfc circuit that the first acquisition module obtains is opened comprises:Busbar voltage, the second determination module comprises: the 6th judgment sub-unit, at the 5th time thresholdAfter value, judge compared with the busbar voltage of obtaining before current busbar voltage is opened with pfc circuit, beThe no tertiary voltage threshold value that exceedes; Second determines subelement, for judging in the 6th judgment sub-unitResult when being, determines that principal phase branch road work state information is for normal, otherwise, determine that principal phase props upRoad work state information is abnormal.
Further, control module comprises: the second judge module, and for judging parafacies branch road workWhether the work state information of making status information and principal phase branch road is extremely; Fault message module,For in the second judge module judged result when being, send PFC operation troubles information.
Further, according to the work of definite parafacies branch road work state information and principal phase branch roadStatus information, the operation of calling corresponding preset strategy control interleaved PFC circuit, comprising: theThree judge modules, for judging whether the work of parafacies branch road work state information or principal phase branch roadWhether status information is abnormal; The 4th judge module, in the 3rd judge module judged resultWhen being, judge currently whether in detecting pattern, if in detecting pattern, send PFC fortuneRow fault message, if not in detecting pattern, opening work state information is normal corresponding propping upRoad, and control pfc circuit under default environmental condition time, restriction correction motion power.
In the present invention, in interleaved PFC circuit, increase the work of principal phase branch road and parafacies branch roadStatus information measuring ability, after the pfc circuit open command triggering, interleaved PFC circuit workDo in process, obtain parafacies branch road running state parameters and principal phase branch road running state parameters,Determining after the running status of principal phase branch road and parafacies branch road, calling corresponding preset strategy control and hand overThe operation of wrong formula pfc circuit. The enforcement of this control program, can solve in prior art effectivelyIn interleaved PFC circuit engineering process, cannot detection branch break down, may cause PFC workIn abnormal problem, the stability of pfc circuit work is provided, further, also increase applicationThe security of equipment.
Brief description of the drawings
Fig. 1 is interleaved PFC circuit theory diagrams in prior art;
Fig. 2 is the optional flow process of one of the interleaved PFC circuit control method of the embodiment of the present inventionFigure;
Fig. 3 is that the another kind of the interleaved PFC circuit control method of the embodiment of the present invention optionally flowsCheng Tu;
Fig. 4 is that another of interleaved PFC circuit control method of the embodiment of the present invention optionally flowsCheng Tu;
Fig. 5 is the optional structure of one of the interleaved PFC circuit control device of the embodiment of the present inventionBlock diagram; And
Fig. 6 is that the another kind of the interleaved PFC circuit control device of the embodiment of the present invention is optionally tiedStructure block diagram.
Detailed description of the invention
Here will at length describe exemplary embodiment, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless separately there is expression, the same numbers in different accompanying drawings representsSame or analogous key element. Embodiment described in following exemplary embodiment does not representThe all embodiments consistent with the present invention. On the contrary, they be only with as claimsThe example of the consistent apparatus and method in some aspects that describe in detail in book, of the present invention.
Embodiment 1
Below in conjunction with accompanying drawing, interleaved PFC circuit control method provided by the invention is saidBright.
Interleaved PFC circuit control method provided by the invention can be applied on air-conditioning equipment,For example, can, in family expenses air-conditioning equipment or market with realizing on temperature control system, also can be applicable to itOn the electric equipment that he comprises interleaved PFC circuit. Fig. 2 illustrates the control of this interleaved PFC circuitThe optional flow chart of one of method processed, as shown in Figure 2, this interleaved PFC circuit controlling partyMethod comprises the steps S102-S106:
S102, in response to the pfc circuit open command triggering, the parafacies that obtains pfc circuit props upRoad running state parameters, to determine parafacies branch road work state information;
When the electric equipment application such as convertible frequency air-conditioner, meeting after pfc circuit unlocking condition, triggeringPfc circuit open command. After the pfc circuit open command triggering, can be according to PFCThe parafacies branch road running state parameters of circuit determines whether parafacies branch road can normally work, orIn the state of fault.
In an optional embodiment, obtain the parafacies branch road running status ginseng of pfc circuitAmount, to determine parafacies branch road work state information, can adopt following scheme: judge whether fullFoot pfc circuit unlocking condition; If meet, obtain the circuit parameter before pfc circuit is opened, excellentSelection of land, the parameter of obtaining can comprise the parameters such as busbar voltage. Further, judging whetherWhile meeting pfc circuit unlocking condition, can first judge whether pfc circuit median generatrix voltage is less than friendshipFlow electric crest voltage (for example, < 365V), if be less than alternating current crest voltage, continue judgementWhether pfc circuit open command triggers for the first time,, detection is controlled to PFC first opportunity that isWhen unlatching, avoid follow-up duplicate detection. If judge, pfc circuit open command is to touch for the first timeSend out, judge and meet pfc circuit unlocking condition. Opening after the parafacies branch road of pfc circuit,Call the first default self-inspection logic and determine parafacies branch road work state information.
In an optional embodiment, also provide the above-mentioned first default self-inspection logic of callingDetermine parafacies branch road work state information, can set in advance the first voltage threshold, according to bus electricityThe relation of pressure and the first voltage threshold, for example, the first voltage threshold is set to 330V,,When busbar voltage is more than or equal to 330V, be defined as high-pressure situations, otherwise, be low pressure situation.Branch office's high-pressure situations or low pressure situation, adopt different schemes to determine, specific as follows:
Specifically, first judge whether busbar voltage is more than or equal to the first voltage threshold; MotherWhen whether line voltage is more than or equal to the first voltage threshold, call the first default self-inspection logic basisThe variable quantity of busbar voltage is determined parafacies branch road work state information. Particularly, calling firstWhen default self-inspection logic is determined parafacies branch road work state information according to the variable quantity of busbar voltage,Can adopt following scheme: busbar voltage is raise, heighten the pfc circuit output voltage values upper limit;Detect busbar voltage rising value in very first time threshold value and whether exceed second voltage threshold value; If so,Determine that parafacies branch road work state information is for normal, otherwise, determine parafacies branch road duty letterBreath is for abnormal. Preferably, very first time threshold value can be set to 6s, and second voltage threshold value can arrangeFor 15V, that is to say, busbar voltage raises while exceeding 15V in 6s, determines parafacies branch roadWork state information is normal, otherwise, determine that parafacies branch road breaks down.
It should be noted that, above-mentioned very first time threshold value can be set to 6s, second voltage hereinIt is only a kind of preferred embodiment that threshold value can be set to 15V, in actual mechanical process, and canChange and arrange as the case may be, the present invention is not limited to this.
In the time that busbar voltage is less than the first voltage threshold (, when busbar voltage < 330V), adjustPreset self-inspection logic with first and determine parafacies branch road work shape according to the current change quantity of parafacies branch roadState information. Particularly, calling the first default self-inspection logic according to the curent change of parafacies branch roadAmount is determined when parafacies branch road work state information, can be adopted following scheme: at pfc circuitParafacies branch road is opened after the second time threshold, judges the electricity of parafacies branch road in the 3rd time thresholdWhether stream is greater than predetermined current threshold value; If so, determine that parafacies branch road work state information is normal,Otherwise, determine that parafacies branch road work state information is for abnormal. Preferably, the second above-mentioned timeThreshold value can be set to 3s, and the 3rd time threshold can be set to 1s, and predetermined current threshold value canBe set to 1A, that is to say, open after 3s at the parafacies branch road of pfc circuit, continuously in 1sElectric current is greater than 1A, determines that parafacies branch road work state information is normal, otherwise, determine parafaciesBranch road breaks down.
It should be noted that, the second above-mentioned time threshold can be set to 3s herein, the 3rd o'clockBetween threshold value can be set to 1s, predetermined current threshold value can be set to 1A, be only a kind of preferablyEmbodiment, in actual mechanical process, can be as the case may be and change arranges, the present inventionBe not limited to this.
S104, obtains the principal phase branch road running state parameters of pfc circuit, to determine principal phase branch roadWork state information;
Complete after the detection of parafacies branch road, can be according to the principal phase branch road running status of pfc circuitParameter, determines principal phase branch road work state information. Specifically, can comprise following steps:Open the principal phase branch road of pfc circuit; After the 4th time threshold, close the parafacies of pfc circuitBranch road; Call the second default self-inspection logic and determine principal phase branch road work state information. Preferably,The 4th above-mentioned time threshold can be set to 3s, that is to say, in the detection that completes parafacies branch roadAfter, open after the principal phase branch road 3s of pfc circuit, carry out the detection of principal phase branch road.
Specifically, determine principal phase branch road work state information calling the second default self-inspection logicTime, can adopt following preferred scheme: after the 5th time threshold, judge current busbar voltageCompared with the busbar voltage of obtaining before opening with pfc circuit, whether exceed tertiary voltage threshold value; IfBe, determine that principal phase branch road work state information is for normal, otherwise, determine principal phase branch road work shapeState information is abnormal. Preferably, above-mentioned the 5th time threshold can be 3s, tertiary voltage threshold valueCan be set to 15V, that is to say, after 3s, current busbar voltage and pfc circuit are openedThe busbar voltage of obtaining before opening is compared, and exceeding (or equaling) 15V is to determine principal phase branch road workMake status information for normal, otherwise, determine that principal phase branch road breaks down.
S106, according to the duty of definite parafacies branch road work state information and principal phase branch roadInformation, the operation of calling corresponding preset strategy control interleaved PFC circuit.
After determining the duty of parafacies branch road and principal phase branch road respectively, can be according to its realityDuty, the operation of calling corresponding preset strategy control interleaved PFC circuit, specifically comesSay, can comprise the steps: to judge the work of parafacies branch road work state information and principal phase branch roadWhether make status information is extremely; If the work of parafacies branch road work state information and principal phase branch roadBe abnormality as status information, can control and send PFC operation troubles information, carryWake up. If whether the work state information of parafacies branch road work state information or principal phase branch road is abnormal,, in parafacies branch road and principal phase branch road, one of them branch road is abnormality, can judge currentWhether, in detecting pattern, if under detecting pattern, can send PFC operation troubles information,As prompting. If not in detecting pattern, opening work state information is normal corresponding branch road,And control pfc circuit under default environmental condition time, restriction correction motion power. SpecificallyWhile realization, can in the time of the maximum conditions such as high temperature, high pressure, to a certain degree limit correction operate power,For example, restriction running frequency, reduces power.
In the above-mentioned preferred embodiment providing, in interleaved PFC circuit, increase principal phaseThe work state information measuring ability of branch road and parafacies branch road, opens and refers at the pfc circuit triggeringAfter order, in interleaved PFC circuit working process, obtain parafacies branch road running state parameters andPrincipal phase branch road running state parameters, is determining after the running status of principal phase branch road and parafacies branch road,Call the operation of corresponding preset strategy control interleaved PFC circuit. The enforcement of this control program,Can effectively solve in prior art cannot detection branch to go out in interleaved PFC circuit engineering processExisting fault, may cause PFC to work in abnormal problem, and the stable of pfc circuit work is providedProperty, further, also increase the security of application apparatus.
Embodiment 2
Interleaved PFC circuit control method based on providing in above-described embodiment 1, the present invention canThe embodiment 2 of choosing also provides a kind of specific implementation of the method, specifically, and Fig. 3Illustrate that whether in this interleaved PFC circuit control method, detect each road PFC branch road out of orderSchematic flow sheet, as shown in Figure 3, the method comprises the steps:
S20, monitors and knows and meet PFC unlocking condition, can trigger pfc circuit open command;
S21, whether too highly detect busbar voltage, and whether PFC opened;
Controlling testing process is to open first in the PFC that powers on, and busbar voltage is non-too highWhen (≤365V), carry out.
S22, records the busbar voltage before PFC opens, and opens parafacies PFC branch road, carries out secondaryPhase PFC branch road self-inspection logic;
S23, judges whether busbar voltage is more than or equal to 330V, if so, performs step S24,Otherwise, execution step S25;
S24, judges whether to realize rising >=15V in busbar voltage 6s, if so, execution stepS26, otherwise, execution step S27;
S25, judges after 3s continuously in 1s, whether electric current is greater than 1A, if so, performs step S26,Otherwise, execution step S28;
S26, judges that parafacies PFC branch road is normal;
S27, judges parafacies PFC branch trouble;
S28, reports parafacies PFC branch trouble after 6s;
S29, opens principal phase PFC, closes parafacies PFC after 3s, starts to carry out principal phase PFC and props upRoad self-inspection logic;
S30, judges after 3s whether bus voltage ratio PFC exceedes before opening or equal 15V,If so, perform step S31, otherwise, execution step S32;
S31, judges that principal phase PFC branch road is normal;
S32, reports principal phase PFC branch trouble after 7s;
S33, according to self-detection result, carries out corresponding PFC and opens strategy
After PFC self-inspection becomes, carry out corresponding PFC and open control strategy. Specifically can be referring to Fig. 4The flow chart illustrating, as shown in Figure 4, if two-way PFC branch road has fault, directly stopsFault machine report; If only principal phase or parafacies pfc circuit fault, report disorderly closedown under test status,If normal operating condition, opens another branch road, in the time of maximum conditions, to a certain degree limit correctionOperate power, and take more excellent radiating control according to operating condition, ensure that air-conditioner is just movingOften.
Embodiment 3
Interleaved PFC circuit control method based on providing in above-described embodiment 1, the present invention canThe embodiment 3 of choosing also provides a kind of interleaved PFC circuit control device, specifically, and figure5 illustrate the optional structured flowchart of one of this interleaved PFC circuit control device, as Fig. 5 instituteShow, this device comprises: the first determining unit 50, open for the pfc circuit in response to triggeringInstruction, obtains the parafacies branch road running state parameters of pfc circuit, to determine the work of parafacies branch roadStatus information; The second determining unit 60, for obtaining the principal phase branch road running status of pfc circuitParameter, to determine principal phase branch road work state information; Control module 70, determines for basisThe work state information of parafacies branch road work state information and principal phase branch road, calls corresponding default planSlightly control the operation of interleaved PFC circuit.
Further, as shown in Figure 6, the first determining unit 50 comprises: the first judge module 51,Be used for judging whether to meet pfc circuit unlocking condition; The first acquisition module 52, for firstJudge module judged result when meeting, is obtained the circuit parameter before pfc circuit is opened; FirstDetermination module 53, for opening the parafacies branch road of pfc circuit, calls the first default self-inspection logicDetermine parafacies branch road work state information.
Further, the first judge module comprises: the first judgment sub-unit, and for judging PFCWhether circuit median generatrix voltage is less than alternating current crest voltage; The second judgment sub-unit, forThe first judgment sub-unit judged result when being less than, judges pfc circuit open command whether firstInferior triggering; The 3rd judgment sub-unit, in the second judgment sub-unit judged result when being,Judge and meet pfc circuit unlocking condition.
Further, the circuit parameter before the pfc circuit that the first acquisition module obtains is opened comprises:Busbar voltage, the first determination module comprises: the 4th judgment sub-unit, for judging busbar voltageWhether be more than or equal to the first voltage threshold; First determines subelement, for sub in the 4th judgementUnit judges result when being, is called the first default self-inspection logic according to the variable quantity of busbar voltageDetermine parafacies branch road work state information.
Further, first determines that subelement comprises: voltage rising submodule, and for by busVoltage raises, and heightens the pfc circuit output voltage values upper limit; First judges submodule, for inspectionSurvey busbar voltage rising value in very first time threshold value and whether exceed second voltage threshold value; First is trueStator modules, in the time that the first judgement submodule is judged as YES, determines parafacies branch road work shapeState information is normal, otherwise, determine that parafacies branch road work state information is for abnormal.
Further, the circuit parameter before the pfc circuit that the first acquisition module obtains is opened comprises:Busbar voltage, the first determination module comprises: the 5th judgment sub-unit, for judging busbar voltageWhether be more than or equal to the first voltage threshold; Second determines subelement, for sub in the 5th judgementUnit judges result when not being, is called the first default self-inspection logic according to the electric current of parafacies branch roadVariable quantity is determined parafacies branch road work state information.
Further, second determines that subelement comprises: second judges submodule, at PFCThe parafacies branch road of circuit is opened after the second time threshold, judges that parafacies props up in the 3rd time thresholdWhether the electric current on road is greater than predetermined current threshold value; Second determines submodule, in the second judgementWhen submodule is judged as YES, determine that parafacies branch road work state information is for normal, otherwise, determineParafacies branch road work state information is abnormal.
Further, as shown in Figure 6, the second determining unit 60 comprises: opening module 61, useIn the principal phase branch road of opening pfc circuit; Closing module 62, for after the 4th time threshold,Close the parafacies branch road of pfc circuit; The second determination module 63, for calling the second default self-inspectionLogic is determined principal phase branch road work state information.
Further, the circuit parameter before the pfc circuit that the first acquisition module obtains is opened comprises:Busbar voltage, the second determination module comprises: the 6th judgment sub-unit, at the 5th time thresholdAfter value, judge compared with the busbar voltage of obtaining before current busbar voltage is opened with pfc circuit, beThe no tertiary voltage threshold value that exceedes; Second determines subelement, for judging in the 6th judgment sub-unitResult when being, determines that principal phase branch road work state information is for normal, otherwise, determine that principal phase props upRoad work state information is abnormal.
Further, control module comprises: the second judge module, and for judging parafacies branch road workWhether the work state information of making status information and principal phase branch road is extremely; Fault message module,For in the second judge module judged result when being, send PFC operation troubles information.
Further, according to the work of definite parafacies branch road work state information and principal phase branch roadStatus information, the operation of calling corresponding preset strategy control interleaved PFC circuit, comprising: theThree judge modules, for judging whether the work of parafacies branch road work state information or principal phase branch roadWhether status information is abnormal; The 4th judge module, in the 3rd judge module judged resultWhen being, judge currently whether in detecting pattern, if in detecting pattern, send PFC fortuneRow fault message, if not in detecting pattern, opening work state information is normal corresponding propping upRoad, and control pfc circuit under default environmental condition time, restriction correction motion power.
About the device in above-described embodiment, wherein unit, module executable operations is concreteMode have been described in detail in the embodiment about the method, will not do in detail hereinSet forth explanation.
In the present invention, in interleaved PFC circuit, increase the work of principal phase branch road and parafacies branch roadMake status information measuring ability, after the pfc circuit open command triggering, interleaved PFC electricityIn the course of work of road, obtain parafacies branch road running state parameters and principal phase branch road running status ginsengAmount, determining after the running status of principal phase branch road and parafacies branch road, calls corresponding preset strategy controlThe operation of interleaved PFC circuit processed. The enforcement of this control program, can solve existing effectivelyIn technology, in interleaved PFC circuit engineering process, cannot detection branch break down, may causePFC works in abnormal problem, and the stability of pfc circuit work is provided, further, and alsoIncrease the security of application apparatus.
Those skilled in the art are considering description and are putting into practice after invention disclosed herein, by easyExpect other embodiment of the present invention. The application is intended to contain any modification of the present invention, useWay or adaptations, these modification, purposes or adaptations follow of the present invention oneAs property principle comprise common practise in the art or the conventional techniques that the present invention does not inventMeans. Description and embodiment are only regarded as exemplary, true scope of the present invention and spiritPointed out by claim below.
Should be understood that, the present invention is not limited to described above and shown in the drawingsPrecision architecture, and can carry out various amendments and change not departing from its scope. The present inventionScope only limited by appended claim.
Claims (22)
1. an interleaved PFC circuit control method, is characterized in that, comprising:
In response to the pfc circuit open command triggering, obtain the parafacies branch road of described pfc circuitRunning state parameters, to determine described parafacies branch road work state information;
Obtain the principal phase branch road running state parameters of described pfc circuit, to determine that described principal phase props upRoad work state information;
According to the described parafacies branch road work state information of determining and the work shape of described principal phase branch roadState information, the operation of calling interleaved PFC circuit described in corresponding preset strategy control.
2. method according to claim 1, is characterized in that, described in obtain described PFCThe parafacies branch road running state parameters of circuit, to determine described parafacies branch road work state information,Comprise:
Judge whether to meet described pfc circuit unlocking condition;
If meet, obtain the circuit parameter before described pfc circuit is opened;
Open the parafacies branch road of described pfc circuit, call described in the first default self-inspection logic determinesParafacies branch road work state information.
3. method according to claim 2, is characterized in that, described in judge whether to meet instituteState pfc circuit unlocking condition, comprising:
Judge whether described pfc circuit median generatrix voltage is less than alternating current crest voltage;
If be less than, judge whether pfc circuit open command triggers for the first time;
If so, judge and meet described pfc circuit unlocking condition.
4. method according to claim 2, is characterized in that, the described PFC electricity obtainingCircuit parameter before open on road comprises: busbar voltage, described in to call the first default self-inspection logic trueFixed described parafacies branch road work state information, comprising:
Judge whether described busbar voltage is more than or equal to the first voltage threshold;
If so, call the described first default self-inspection logic true according to the variable quantity of described busbar voltageFixed described parafacies branch road work state information.
5. method according to claim 4, is characterized in that, described in call described first pre-If self-inspection logic is determined described parafacies branch road duty letter according to the variable quantity of described busbar voltageBreath, comprising:
Described busbar voltage is raise, heighten the pfc circuit output voltage values upper limit;
Detect described busbar voltage rising value in very first time threshold value and whether exceed second voltage thresholdValue;
If so, determine that described parafacies branch road work state information is normal, otherwise, described in determiningParafacies branch road work state information is abnormal.
6. method according to claim 2, is characterized in that, the described PFC electricity obtainingCircuit parameter before open on road comprises: busbar voltage, described in to call the first default self-inspection logic trueFixed described parafacies branch road work state information, comprising:
Judge whether described busbar voltage is more than or equal to the first voltage threshold;
If not, call the described first default self-inspection logic and become according to the electric current of described parafacies branch roadChange amount is determined described parafacies branch road work state information.
7. method according to claim 6, is characterized in that, described in call described first pre-If self-inspection logic is determined described parafacies branch road work shape according to the current change quantity of described parafacies branch roadState information, comprising:
Parafacies branch road at described pfc circuit is opened after the second time threshold, judges at the 3rd o'clockBetween in threshold value the electric current of described parafacies branch road whether be greater than predetermined current threshold value;
If so, determine that described parafacies branch road work state information is normal, otherwise, described in determiningParafacies branch road work state information is abnormal.
8. method according to claim 1, is characterized in that, described in obtain described PFCThe principal phase branch road running state parameters of circuit, to determine described principal phase branch road work state information,Comprise:
Open the principal phase branch road of described pfc circuit;
After the 4th time threshold, close the parafacies branch road of described pfc circuit;
Call the second default self-inspection logic and determine described principal phase branch road work state information.
9. method according to claim 8, is characterized in that, the described PFC electricity obtainingCircuit parameter before open on road comprises: busbar voltage, described in to call the second default self-inspection logic trueFixed described principal phase branch road work state information, comprising:
After the 5th time threshold, judge before current busbar voltage and described pfc circuit are opened and obtainThe busbar voltage of getting is compared, and whether exceedes tertiary voltage threshold value;
If so, determine that described principal phase branch road work state information is normal, otherwise, described in determiningPrincipal phase branch road work state information is abnormal.
10. method according to claim 1, is characterized in that, the institute that described basis is definiteThe work state information of stating parafacies branch road work state information and described principal phase branch road, calls correspondenceThe operation of interleaved PFC circuit described in preset strategy control, comprising:
Judge the work state information of described parafacies branch road work state information and described principal phase branch roadWhether be abnormal;
If so, send PFC operation troubles information.
11. methods according to claim 1, is characterized in that, the institute that described basis is definiteThe work state information of stating parafacies branch road work state information and described principal phase branch road, calls correspondenceThe operation of interleaved PFC circuit described in preset strategy control, comprising:
Judge whether the duty of described parafacies branch road work state information or described principal phase branch roadWhether information is abnormal;
If so, judge currently whether in detecting pattern, if in detecting pattern, send PFCOperation troubles information, if not in detecting pattern, it is normal corresponding opening work state informationBranch road, and control described pfc circuit under default environmental condition time, restriction correction motionPower.
12. 1 kinds of interleaved PFC circuit control devices, is characterized in that, comprising:
The first determining unit, for the pfc circuit open command in response to triggering, described in obtainingThe parafacies branch road running state parameters of pfc circuit, to determine described parafacies branch road duty letterBreath;
The second determining unit, for obtaining the principal phase branch road running state parameters of described pfc circuit,To determine described principal phase branch road work state information;
Control module, the described parafacies branch road work state information and the described master that determine for basisThe work state information of phase branch road, calls interleaved PFC circuit described in corresponding preset strategy controlOperation.
13. devices according to claim 12, is characterized in that, described first determines listUnit comprises:
The first judge module, for judging whether to meet described pfc circuit unlocking condition;
The first acquisition module, in the first judge module judged result when meeting, obtain instituteState the circuit parameter before pfc circuit is opened;
The first determination module, for opening the parafacies branch road of described pfc circuit, calls first pre-If self-inspection logic is determined described parafacies branch road work state information.
14. devices according to claim 13, is characterized in that, described first judges mouldPiece comprises:
The first judgment sub-unit, for judging whether described pfc circuit median generatrix voltage is less than friendshipFlow electric crest voltage;
The second judgment sub-unit, in described the first judgment sub-unit judged result when being less than,Judge whether pfc circuit open command triggers for the first time;
The 3rd judgment sub-unit, in described the second judgment sub-unit judged result when being,Judge and meet described pfc circuit unlocking condition.
15. devices according to claim 13, is characterized in that, described first obtains mouldCircuit parameter before the described pfc circuit that piece obtains is opened comprises: busbar voltage, described firstDetermination module comprises:
The 4th judgment sub-unit, for judging whether described busbar voltage is more than or equal to the first electricityPress threshold value;
First determines subelement, in described the 4th judgment sub-unit judged result when being,Call the described first default self-inspection logic and determine described parafacies according to the variable quantity of described busbar voltageBranch road work state information.
16. devices according to claim 15, is characterized in that, described first determines sonUnit comprises:
Voltage rising submodule, for described busbar voltage is raise, heightens pfc circuit outputThe magnitude of voltage upper limit;
First judges submodule, rises for detection of described busbar voltage in very first time threshold valueWhether value exceeds second voltage threshold value;
First determines submodule, in the time that described first judges that submodule is judged as YES, determinesDescribed parafacies branch road work state information is normal, otherwise, determine described parafacies branch road work shapeState information is abnormal.
17. devices according to claim 13, is characterized in that, described first obtains mouldCircuit parameter before the described pfc circuit that piece obtains is opened comprises: busbar voltage, described firstDetermination module comprises:
The 5th judgment sub-unit, for judging whether described busbar voltage is more than or equal to the first electricityPress threshold value;
Second determines subelement, in described the 5th judgment sub-unit judged result when not being,Call described in the described first default self-inspection logic determines according to the current change quantity of described parafacies branch roadParafacies branch road work state information.
18. devices according to claim 17, is characterized in that, described second determines sonUnit comprises:
Second judges submodule, opens for the second time for the parafacies branch road at described pfc circuitAfter threshold value, judge whether the electric current of described parafacies branch road in the 3rd time threshold is greater than default electricityStream threshold value;
Second determines submodule, in the time that described second judges that submodule is judged as YES, determinesDescribed parafacies branch road work state information is normal, otherwise, determine described parafacies branch road work shapeState information is abnormal.
19. devices according to claim 12, is characterized in that, described second determines listUnit comprises:
Opening module, for opening the principal phase branch road of described pfc circuit;
Closing module, for after the 4th time threshold, the parafacies of closing described pfc circuit props upRoad;
The second determination module, determines described principal phase branch road work for calling the second default self-inspection logicMake status information.
20. devices according to claim 19, is characterized in that, described first obtains mouldCircuit parameter before the described pfc circuit that piece obtains is opened comprises: busbar voltage, described secondDetermination module comprises:
The 6th judgment sub-unit, for after the 5th time threshold, judge current busbar voltage withThe busbar voltage that described pfc circuit obtains before opening is compared, and whether exceedes tertiary voltage threshold value;
Second determines subelement, in described the 6th judgment sub-unit judged result when being,Determine that described principal phase branch road work state information is for normal, otherwise, determine described principal phase branch road workMake status information for abnormal.
21. devices according to claim 12, is characterized in that, described control module bagDraw together:
The second judge module, for judging described parafacies branch road work state information and described principal phaseWhether the work state information of branch road is extremely;
Fault message module, in described the second judge module judged result when being, sendPFC operation troubles information.
22. devices according to claim 12, is characterized in that, described basis is determinedThe work state information of described parafacies branch road work state information and described principal phase branch road, it is right to callThe operation of answering interleaved PFC circuit described in preset strategy control, comprising:
The 3rd judge module, for judge whether described parafacies branch road work state information or described inWhether the work state information of principal phase branch road is abnormal;
The 4th judge module, in described the 3rd judge module judged result when being, judgementCurrent whether in detecting pattern, if in detecting pattern, send PFC operation troubles information,If not in detecting pattern, opening work state information is normal corresponding branch road, and controls instituteState pfc circuit under default environmental condition time, restriction correction motion power.
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| CN105591536B (en) | 2018-09-07 |
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