CN108736788A - Switching method, air conditioner and the computer readable storage medium of pfc circuit - Google Patents
Switching method, air conditioner and the computer readable storage medium of pfc circuit Download PDFInfo
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- CN108736788A CN108736788A CN201810553846.6A CN201810553846A CN108736788A CN 108736788 A CN108736788 A CN 108736788A CN 201810553846 A CN201810553846 A CN 201810553846A CN 108736788 A CN108736788 A CN 108736788A
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- pfc
- working condition
- pfc circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
- H02P21/28—Stator flux based control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
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- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
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Abstract
The invention discloses a kind of switching methods of pfc circuit, include the following steps：Obtain the DC bus-bar voltage of the cooler compressor and the demand voltage of the compressor busbar voltage；Based on the mapping relations between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit, determine and matched first working condition of the DC bus-bar voltage；Determine whether first working condition, second working condition current with the pfc circuit be consistent；When first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched to first working condition.The invention also discloses a kind of air conditioner and computer readable storage mediums.The present invention can reasonably realize the switching between low frequency PFC states and high frequency PFC states according to the DC bus-bar voltage and the demand voltage of busbar voltage so that air conditioner can take into account the demand of efficiency and power factor.
Description
Technical field
It can the present invention relates to a kind of air-conditioning technical field more particularly to switching method of pfc circuit, air conditioner and computer
Read storage medium.
Background technology
Currently, PFC (Power Factor Correction, PFC) technology has been widely used in air conditioner
In, PFC technologies include low frequency PFC and high frequency PFC.
Wherein, low frequency PFC is a kind of lower PFC technologies of switching frequency, and under normal circumstances, switching frequency is less than
1KHz, such as pulse PFC, multiple-pulse PFC.High frequency PFC is PFC technology of the switching frequency in 30K or more, including Boost
The topological structures such as PFC and totem PFC, high frequency PFC can effectively improve power factor.Using high frequency PFC system power because
Number is high, but efficiency is lower than using the efficiency of low frequency PFC system.
Existing air conditioner generally uses high frequency PFC, to obtain higher power factor.But due to the use of high frequency PFC
Energy efficiency of air conditioner it is low, and demand of the air conditioner to efficiency can not be taken into account.And some are only with the air conditioner of low frequency PFC, then without
Method takes into account demand of the air conditioner to power factor.Cause existing air conditioner that can not take into account air conditioner simultaneously to efficiency and power factor
Demand.
The above is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that the above is existing skill
Art.
Invention content
The main purpose of the present invention is to provide a kind of switching method of pfc circuit, air conditioner and computer-readable storages
Medium, it is intended to solve existing air conditioner often and can not be taken into account simultaneously only with high frequency PFC or low frequency PFC air conditioner to efficiency and
The technical issues of demand of power factor.
To achieve the above object, the present invention provides a kind of switching method of pfc circuit, is applied to the sky equipped with pfc circuit
Device, the working condition of the pfc circuit is adjusted to include at least low frequency PFC states and high frequency PFC states, the switching of the pfc circuit
Method includes the following steps：
Obtain the DC bus-bar voltage of the cooler compressor and the demand voltage of the compressor busbar voltage；
It is closed based on the mapping between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit
System determines and matched first working condition of the DC bus-bar voltage；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit
It is switched to first working condition.
Further, in one embodiment, it is described based on the DC bus-bar voltage, the demand voltage with it is described
Mapping relations between the working condition of pfc circuit determine the step with matched first working condition of the DC bus-bar voltage
Suddenly include：
Determine whether the demand voltage is less than the DC bus-bar voltage；
When the demand voltage is greater than or equal to the DC bus-bar voltage, determine that first working condition is high frequency
PFC states.
Further, in one embodiment, whether the determination demand voltage is less than the DC bus-bar voltage
The step of after, further include：
When the demand voltage is less than the DC bus-bar voltage, determine that first working condition is low frequency PFC shapes
State.
Further, in one embodiment, the determination first working condition and the pfc circuit it is current the
The whether consistent step of two working conditions includes：
Determine the corresponding PFC frequencies of second working condition and the corresponding default PFC frequencies of first working condition
Rate range；
Determine the PFC frequencies whether in the default PFC frequency ranges, wherein to be in institute in the PFC frequencies
When stating except default PFC frequency ranges, first working condition, second working condition current with the pfc circuit is determined not
Unanimously.
Further, in one embodiment, the step of determination second working condition corresponding PFC frequencies are wrapped
It includes：
Sampling operation is carried out to the pfc circuit, to obtain the current waveform of the pfc circuit；
The PFC frequencies are determined according to the current waveform.
Further, in one embodiment, the step of demand voltage for obtaining the compressor busbar voltage wraps
It includes：
Obtain the d shaft voltages and q shaft voltages of the compressor；
The demand voltage is calculated based on the d shaft voltages and the q shaft voltages.
Further, in one embodiment, the step of d shaft voltages and q shaft voltages for obtaining the compressor wraps
It includes：
The d shaft currents and q shaft currents of the compressor are obtained, and institute is calculated separately based on the d shaft currents, q shaft currents
State d shaft voltages and the q shaft voltages.
Further, in one embodiment, the pfc circuit includes Boost PFC.
In addition, to achieve the above object, the present invention also provides a kind of air conditioner, the air conditioner includes：Memory, processing
Device and the changeover program for being stored in the pfc circuit that can be run on the memory and on the processor, the pfc circuit
The step of switching method of any one of them pfc circuit among the above is realized when changeover program is executed by the processor.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
The changeover program of pfc circuit is stored on storage medium, the changeover program of the pfc circuit is realized above-mentioned when being executed by processor
The step of switching method of any one of them pfc circuit.
The present invention passes through the DC bus-bar voltage for obtaining the cooler compressor and the compressor busbar voltage
Demand voltage, then based on reflecting between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit
Relationship is penetrated, determining and matched first working condition of the DC bus-bar voltage then determines first working condition and institute
Whether consistent the second current working condition of pfc circuit is stated, then in first working condition and second working condition
When inconsistent, the working condition of the pfc circuit is switched to first working condition, realizes the direct current according to compressor
The demand voltage of busbar voltage and busbar voltage adjusts the working condition of pfc circuit, can be according to the DC bus-bar voltage and mother
The demand voltage of line voltage reasonably realizes the switching between low frequency PFC states and high frequency PFC states so that air conditioner can be simultaneous
Gartner is imitated and the demand of power factor.
Description of the drawings
Fig. 1 is the structural schematic diagram of air conditioner in the hardware running environment that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of the switching method first embodiment of pfc circuit of the present invention；
Fig. 3 is current waveform schematic diagram when pfc circuit of the present invention is in low frequency PFC states；
Fig. 4 is current waveform schematic diagram when pfc circuit of the present invention is in high frequency PFC states；
Fig. 5 is that current waveform, the DC bus-bar voltage of compressor and the waveform of demand voltage of FPC circuits of the present invention show
It is intended to；
Fig. 6 be pfc circuit of the present invention switching method second embodiment in be based on the DC bus-bar voltage, the demand
Mapping relations between voltage and the working condition of the pfc circuit determine and matched first work of the DC bus-bar voltage
The refinement flow diagram for the step of making state；
Fig. 7 is determining first working condition in the switching method 3rd embodiment of pfc circuit of the present invention and the PFC
The refinement flow diagram of the current whether consistent step of the second working condition of circuit；
Fig. 8 is the corresponding PFC of determination second working condition in the switching method fourth embodiment of pfc circuit of the present invention
The refinement flow diagram of the step of frequency and first working condition corresponding default PFC frequency ranges；
Fig. 9 is female for the direct current for obtaining the cooler compressor in the 5th embodiment of switching method of pfc circuit of the present invention
The refinement flow diagram of the step of demand voltage of line voltage and the compressor busbar voltage.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in Figure 1, in the hardware running environment that Fig. 1, which is the embodiment of the present invention, to be related to air conditioner structural representation
Figure.
As shown in Figure 1, the air conditioner may include：Processor 1001, such as CPU, network interface 1004, user interface
1003, memory 1005, communication bus 1002.Wherein, communication bus 1002 is for realizing the connection communication between these components.
User interface 1003 may include display screen (Display), input unit such as keyboard (Keyboard), optional user interface
1003 can also include standard wireline interface and wireless interface.Network interface 1004 may include optionally that the wired of standard connects
Mouth, wireless interface (such as WI-FI interfaces).Memory 1005 can be high-speed RAM memory, can also be stable memory
(non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned processor
1001 storage device.
Optionally, air conditioner can also include camera, RF (Radio Frequency, radio frequency) circuit, sensor, sound
Frequency circuit, WiFi module etc..Wherein, sensor such as optical sensor, motion sensor and other sensors.Certainly, empty
Device is adjusted to can also configure the other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, it is no longer superfluous herein
It states.
It will be understood by those skilled in the art that air conditioner structure shown in Fig. 1 does not constitute the restriction to air conditioner, it can
To include either combining certain components or different components arrangement than illustrating more or fewer components.
As shown in Figure 1, as may include that operating system, network are logical in a kind of memory 1005 of computer storage media
The changeover program of letter module, Subscriber Interface Module SIM and pfc circuit.
In air conditioner shown in Fig. 1, network interface 1004 be mainly used for connect background server, with background server into
Row data communication；User interface 1003 is mainly used for connecting client (user terminal), with client into row data communication；And it handles
Device 1001 can be used for calling the changeover program of the pfc circuit stored in memory 1005.
In the present embodiment, air conditioner includes：It memory 1005, processor 1001 and is stored on the memory 1005
And the changeover program for the pfc circuit that can be run on the processor 1001, wherein processor 1001 calls in memory 1005
When the changeover program of the pfc circuit of storage, and execute following operation：
Obtain the DC bus-bar voltage of the cooler compressor and the demand voltage of the compressor busbar voltage；
It is closed based on the mapping between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit
System determines and matched first working condition of the DC bus-bar voltage；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit
It is switched to first working condition.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Determine whether the demand voltage is less than the DC bus-bar voltage；
When the demand voltage is greater than or equal to the DC bus-bar voltage, determine that first working condition is high frequency
PFC states.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
When the demand voltage is less than the DC bus-bar voltage, determine that first working condition is low frequency PFC shapes
State.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Determine the corresponding PFC frequencies of second working condition and the corresponding default PFC frequencies of first working condition
Rate range；
Determine the PFC frequencies whether in the default PFC frequency ranges, wherein to be in institute in the PFC frequencies
When stating except default PFC frequency ranges, first working condition, second working condition current with the pfc circuit is determined not
Unanimously.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Sampling operation is carried out to the pfc circuit, to obtain the current waveform of the pfc circuit；
The PFC frequencies are determined according to the current waveform.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Obtain the d shaft voltages and q shaft voltages of the compressor；
The demand voltage is calculated based on the d shaft voltages and the q shaft voltages.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
The d shaft currents and q shaft currents of the compressor are obtained, and institute is calculated separately based on the d shaft currents, q shaft currents
State d shaft voltages and the q shaft voltages.
The present invention also provides a kind of switching methods of pfc circuit, are the switching side of pfc circuit of the present invention with reference to Fig. 2, Fig. 2
The flow diagram of method first embodiment.
In the present embodiment, the switching method of the pfc circuit is applied to the air conditioner equipped with pfc circuit, the pfc circuit
Working condition include at least low frequency PFC states and high frequency PFC states.Wherein, it is in low frequency in the working condition of pfc circuit
PFC states, the pfc circuit operate under low frequency PFC functions, to improve the efficiency of air conditioner；At the working condition of pfc circuit
In high frequency PFC states, which operates under high frequency PFC functions, to improve the power factor of air conditioner.
Wherein, which includes Boost PFC or totem PFC.Since Boost PFC can also promote compressor
DC bus-bar voltage, therefore Boost PFC can be used in the pfc circuit.Specifically, when pfc circuit is in low frequency PFC states,
The pfc circuit is low frequency multiple-pulse PFC, and when pfc circuit is in high frequency PFC states, which is Boost PFC.
As shown in figure 3, the current waveform that Fig. 3 is the pfc circuit when being in low frequency PFC states, the electric current of usual low frequency PFC
Periodicity shown in Fig. 3 is presented in waveform, and current spike when being closed without PFC occurs, and sine wave is not also presented.With high frequency
PFC states are compared, and pfc circuit is more efficient at this time, are more advantageous to the ultrahigh energy efficiency for realizing air-conditioning.
As shown in figure 4, the current waveform that Fig. 4 is the pfc circuit when being in high frequency PFC states, the electric current of usual high frequency PFC
Waveform is presented the sinusoidal wave shape in Fig. 4, and with the alternating voltage same-phase of input.Compared with low frequency PFC states, PFC is electric at this time
Road can be with the DC bus-bar voltage of constant compression machine, and DC bus-bar voltage can be lifted, and can less weak magnetic cause
Electric current increase.
In the present embodiment, the switching method of the pfc circuit includes：
Step S100 obtains the DC bus-bar voltage of the cooler compressor and the compressor busbar voltage
Demand voltage；
It in the present embodiment, can real-time or timing acquisition cooler compressor DC bus electricity when air conditioner is run
The demand voltage of pressure and the busbar voltage of the compressor.Specifically, busbar voltage sampling module can be set in air conditioner,
Directly acquire the DC bus-bar voltage of compressor by the busbar voltage sampling module, air conditioner can in real time or the timing acquisition mother
The DC bus-bar voltage of the collected compressor of line voltage sampling module, meanwhile, the d shaft voltages and q shaft voltages of compressor are obtained,
And the demand voltage of busbar voltage is determined according to d shaft voltages and q shaft voltages.
It should be noted that in other embodiments, the demand electricity of busbar voltage can also be obtained by other algorithms
Pressure, is not repeating herein.
Step S200, based between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit
Mapping relations, determine with matched first working condition of the DC bus-bar voltage；
In the present embodiment, the mapping that can pre-set DC bus-bar voltage, demand voltage and pfc circuit working condition is closed
System, when getting DC bus-bar voltage and demand voltage, according to the DC bus-bar voltage, the demand voltage and pfc circuit
The mapping relations of working condition obtain and first working condition.
Step S300 determines whether first working condition, second working condition current with the pfc circuit be consistent；
Step S400, when first working condition and second working condition are inconsistent, by the pfc circuit
Working condition is switched to first working condition.
In the present embodiment, when determining the first working condition, determine that first working condition and pfc circuit are current
Whether the second working condition is consistent；It specifically, can be by the corresponding predeterminated frequency range of the first working condition, with the pfc circuit
The corresponding PFC frequencies of the second current working condition, the i.e. current PFC frequencies of pfc circuit, determine the first working condition and second
Whether working condition is consistent, wherein when PFC frequencies are within the scope of predeterminated frequency, the first working condition of judgement and the second work
Make state consistency, when PFC frequencies are in except predeterminated frequency range, the first working condition of judgement differs with the second working condition
It causes.
If for example, the first working condition be low frequency PFC states, the predeterminated frequency ranging from corresponding frequencies of low frequency PFC
Range, when the current PFC frequencies of the pfc circuit are within the scope of the predeterminated frequency, which is in low frequency PFC states,
I.e. the first working condition is consistent with the second working condition, and otherwise the first working condition and the second working condition are inconsistent；If first
Working condition is high frequency PFC states, then the predeterminated frequency ranging from corresponding frequency ranges of high frequency PFC, current in the pfc circuit
PFC frequencies when being within the scope of the predeterminated frequency, which is in high frequency PFC states, i.e. the first working condition and second
Working condition is consistent, and otherwise the first working condition and the second working condition are inconsistent.
When determining that the first working condition and the second working condition are inconsistent, the working condition of pfc circuit is switched to the
One working condition；For example, the first working condition is low frequency PFC states, the second working condition is high frequency PFC states, then by PFC electricity
The working condition on road is switched to low frequency PFC states, i.e. the working condition of pfc circuit is switched to low frequency PFC shapes by high frequency PFC states
State；And then realize the switching in pfc circuit between low frequency PFC states and high frequency PFC states, it can be under specific operation, by PFC
The working condition of circuit is switched to low frequency PFC states by high frequency PFC states, to ensure the high energy efficiency of air conditioner, alternatively, by PFC
The working condition of circuit is switched to high frequency PFC states by low frequency PFC states, to ensure that air conditioner High Power Factor is run, in turn
Take into account demand of the air conditioner to efficiency and power factor.
It should be noted that the air conditioner manufacture before debugged when, using oscillograph carry out 2 road current samples, 1
The current waveform of road current sample acquisition PFC electric currents, 1 road current sample acquisition DC bus-bar voltage and DA mouthfuls of outputs of air conditioner
Busbar voltage demand voltage.The PFC frequencies of pfc circuit are obtained by current waveform, and aobvious in the display interface of oscillograph
Show current waveform, DC bus-bar voltage and demand voltage.It is the direct current of the current waveform of FPC circuits, compressor with reference to Fig. 5, Fig. 5
The waveform diagram of busbar voltage and demand voltage, in the DC bus-bar voltage of the compressor of Fig. 5 and the wave of demand voltage
In shape schematic diagram, solid line is DC bus-bar voltage wavy curve, dotted line is demand voltage wavy curve；As shown in Figure 5, in PFC
When the working condition of circuit is switched to high frequency PFC states by low frequency PFC states, demand voltage gradually rises, while DC bus
Voltage gradually rises until being equal to demand voltage, it is readily appreciated that, it is big in DC bus-bar voltage with the raising of DC bus-bar voltage
When demand voltage, the working condition of pfc circuit is switched to low frequency PFC states by high frequency PFC states.
Using the air conditioner of the switching method of the present embodiment pfc circuit, with it is existing using the air conditioner of high frequency PFC compared with,
The problem that the demand of efficiency and power factor can be taken into account, and then avoid air conditioner high energy consumption, efficiency low, while the air conditioner is also
The boosting demand of compressor busbar voltage can be taken into account.
The switching method for the pfc circuit that the present embodiment proposes, by the DC bus electricity for obtaining the cooler compressor
The demand voltage of pressure and the compressor busbar voltage is then based on the DC bus-bar voltage, the demand voltage and institute
The mapping relations between the working condition of pfc circuit, determination and matched first working condition of the DC bus-bar voltage are stated, and
Determine whether first working condition, second working condition current with the pfc circuit be consistent afterwards, then described first
When working condition is inconsistent with second working condition, the working condition of the pfc circuit is switched to first work
State realizes the working condition that pfc circuit is adjusted according to the DC bus-bar voltage of compressor and the demand voltage of busbar voltage,
Low frequency PFC states and high frequency PFC states can be reasonably realized according to the DC bus-bar voltage and the demand voltage of busbar voltage
Between switching so that air conditioner can take into account the demand of efficiency and power factor.
Based on first embodiment, the second embodiment of the switching method of pfc circuit of the present invention is proposed, with reference to Fig. 6, in this reality
It applies in example, step S200 includes：
Step S210, determines whether the demand voltage is less than the DC bus-bar voltage；
Step S220 determines first work when the demand voltage is greater than or equal to the DC bus-bar voltage
State is high frequency PFC states.
Further, in one embodiment, after step S210, further include：It is less than in the demand voltage described straight
When flowing busbar voltage, determine that first working condition is low frequency PFC states.
In the present embodiment, it in the demand voltage of the DC bus-bar voltage and busbar voltage that get compressor, determines
Whether demand voltage is less than DC bus-bar voltage, if demand voltage is greater than or equal to DC bus-bar voltage, it is determined that first work
It is low high frequency PFC states to make state, if the demand voltage is less than the DC bus-bar voltage, it is determined that high first working condition
For high frequency PFC states, and then the can be accurately determined according to the DC bus-bar voltage of compressor and the demand voltage of busbar voltage
One working condition improves the accuracy for the switching that pfc circuit carries out between low frequency PFC states and high frequency PFC states.
Whether the switching method for the pfc circuit that the present embodiment proposes is less than the direct current by the determination demand voltage
Busbar voltage then, when the demand voltage is greater than or equal to the DC bus-bar voltage, determines first working condition
For high frequency PFC states, the first work can be accurately determined according to the DC bus-bar voltage of compressor and the demand voltage of busbar voltage
Make state, improves the accuracy for the switching that pfc circuit carries out between low frequency PFC states and high frequency PFC states so that air conditioner energy
Enough take into account the demand of efficiency and power factor.
Based on first embodiment, the 3rd embodiment of the switching method of pfc circuit of the present invention is proposed, with reference to Fig. 7, in this reality
It applies in example, step S300 includes：
Step S310 determines that the corresponding PFC frequencies of second working condition and first working condition are corresponding
Default PFC frequency ranges；
Whether step S320 determines the PFC frequencies in the default PFC frequency ranges, wherein in the PFC
When frequency is in except the default PFC frequency ranges, determine that first working condition differs with second working condition
It causes.
In the present embodiment, when determining the first working condition matched with the running frequency of compressor, obtain this first
The corresponding PFC frequencies of the second working condition of the corresponding default PFC frequency ranges of working condition and pfc circuit currently,
In, which refers to the current running frequency of the pfc circuit, which refers to that the pfc circuit is in this
PFC frequency ranges when the first working condition, if the first working condition is high frequency PFC states, the predeterminated frequency is ranging from high
The corresponding frequency ranges of frequency PFC.
When determining PFC frequencies and default PFC frequency ranges, determine the PFC frequencies whether in default PFC frequency ranges
It is interior, if PFC frequencies are in the default PFC frequency ranges, judge that the first working condition is consistent with the second working condition, this
The working condition of Shi Wuxu adjustment pfc circuits judges the first work if PFC frequencies are in except the default PFC frequency ranges
It is inconsistent to make state second working condition current with pfc circuit, at this time, it may be necessary to switch the working condition of pfc circuit, to meet
The demand of air conditioner high energy efficiency and High Power Factor.
The switching method for the pfc circuit that the present embodiment proposes passes through the corresponding PFC frequencies of determination second working condition
Whether rate and the corresponding default PFC frequency ranges of first working condition then determine the PFC frequencies in described
In default PFC frequency ranges, wherein when the PFC frequencies are in except the default PFC frequency ranges, determine described the
One working condition and second working condition are inconsistent, can accurately be judged according to PFC frequencies and default PFC frequency ranges
Whether the first working condition consistent with the second working condition, improve pfc circuit high frequency PFC states and low frequency PFC states it
Between the accuracy that switches.
Based on 3rd embodiment, the fourth embodiment of the switching method of pfc circuit of the present invention is proposed, with reference to Fig. 8, in this reality
It applies in example, step S310 includes：
Step S311 carries out sampling operation, to obtain the current waveform of the pfc circuit to the pfc circuit；
Step S312 determines the PFC frequencies according to the current waveform.
In the present embodiment, high since periodicity shown in Fig. 3 is presented in the current waveform of low frequency PFC with reference to Fig. 3 and Fig. 4
The sinusoidal wave shape in Fig. 4 is presented in the current waveform of frequency PFC, and therefore can be by sampling electricity with the alternating voltage same-phase of input
Road carries out sampling operation to pfc circuit, and then obtains the current waveform of pfc circuit, and determines PFC frequencies according to the current waveform
Rate, and then accurately determine the current PFC frequencies of the pfc circuit.
The switching method for the pfc circuit that the present embodiment proposes, by carrying out sampling operation to the pfc circuit, to obtain
The current waveform of the pfc circuit determines the PFC frequencies then according to the current waveform, can be according to the electricity of pfc circuit
It flows waveform and accurately determines PFC frequencies, and then the first working condition is accurately judged according to PFC frequencies and default PFC frequency ranges
It is whether consistent with the second working condition, it further improves pfc circuit and switches between high frequency PFC states and low frequency PFC states
Accuracy.
Based on first embodiment, the 5th embodiment of the switching method of pfc circuit of the present invention is proposed, with reference to Fig. 9, in this reality
It applies in example, step S100 includes：
Step S110 obtains the d shaft voltages and q shaft voltages of the compressor；
Step S120 calculates the demand voltage based on the d shaft voltages and the q shaft voltages.
In the present embodiment, the demand electricity of the busbar voltage of compressor can be calculated by d shaft voltages, the q axis electricity of compressor
Pressure, specifically, obtains the d shaft voltages u of compressordAnd q shaft voltages uq, and demand voltage is calculated according to the following formula：
Further, in one embodiment, step S110 includes：The d shaft currents and q shaft currents of the compressor are obtained,
And the d shaft voltages and the q shaft voltages are calculated separately based on the d shaft currents, q shaft currents.
In the present embodiment, can the d shaft currents i of compressor be obtained according to existing algorithm firstd, q shaft currents iq, according to
Electric moter voltage equation calculation obtains d shaft voltages udAnd q shaft voltages uq。
Specifically, the d shaft currents i of compressor can be obtained by existing algorithmdAnd q shaft currents iq, pass through stator magnetic linkage equation
Obtain magnetic linkage component of the stator of compressor under d, q axis, stator magnetic linkage equation such as following formula：
Wherein, Ld、LqRespectively equivalent inductance of the stator inductance of compressor under d, q axis；ψfFor rotor-exciting magnetic field chain
Cross the magnetic linkage of stator winding；ψd、ψqRespectively magnetic linkage component of the stator of compressor under d, q axis.
Then, according to d shaft currents id, q shaft currents iq, magnetic linkage component ψ of the stator under d, q axisd、ψqPass through electric moter voltage
Equation calculation obtains d shaft voltages udAnd q shaft voltages uq, electric moter voltage equation such as following formula：
Wherein, p is differential operator, RsFor stator resistance, ωrFor rotor velocity.
The switching method for the pfc circuit that the present embodiment proposes, by obtaining the d shaft voltages and q shaft voltages of the compressor,
Then the d shaft voltages are based on and the q shaft voltages calculate the demand voltage, the demand of busbar voltage can be accurately obtained
Voltage, and then the first working condition is accurately determined according to the demand voltage of busbar voltage, it further increases pfc circuit and carries out low frequency
The accuracy of switching between PFC states and high frequency PFC states so that air conditioner can take into account the need of efficiency and power factor
It asks.
In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium, the computer readable storage medium
On be stored with the changeover program of pfc circuit, following operation is realized when the changeover program of the pfc circuit is executed by processor：
Obtain the DC bus-bar voltage of the cooler compressor and the demand voltage of the compressor busbar voltage；
It is closed based on the mapping between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit
System determines and matched first working condition of the DC bus-bar voltage；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit
It is switched to first working condition.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Determine whether the demand voltage is less than the DC bus-bar voltage；
When the demand voltage is greater than or equal to the DC bus-bar voltage, determine that first working condition is high frequency
PFC states.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
When the demand voltage is less than the DC bus-bar voltage, determine that first working condition is low frequency PFC shapes
State.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Determine the corresponding PFC frequencies of second working condition and the corresponding default PFC frequencies of first working condition
Rate range；
Determine the PFC frequencies whether in the default PFC frequency ranges, wherein to be in institute in the PFC frequencies
When stating except default PFC frequency ranges, first working condition, second working condition current with the pfc circuit is determined not
Unanimously.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Sampling operation is carried out to the pfc circuit, to obtain the current waveform of the pfc circuit；
The PFC frequencies are determined according to the current waveform.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Obtain the d shaft voltages and q shaft voltages of the compressor；
The demand voltage is calculated based on the d shaft voltages and the q shaft voltages.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
The d shaft currents and q shaft currents of the compressor are obtained, and institute is calculated separately based on the d shaft currents, q shaft currents
State d shaft voltages and the q shaft voltages.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements include not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
There is also other identical elements in the process of element, method, article or system.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical scheme of the present invention substantially in other words does the prior art
Going out the part of contribution can be expressed in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions use so that a station terminal equipment (can be mobile phone,
Computer, server, air conditioner device or the network equipment etc.) execute method described in each embodiment of the present invention.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of switching method of pfc circuit, which is characterized in that be applied to the air conditioner equipped with pfc circuit, the pfc circuit
Working condition include the following steps including at least low frequency PFC states and high frequency PFC states, the switching method of the pfc circuit：
Obtain the DC bus-bar voltage of the cooler compressor and the demand voltage of the compressor busbar voltage；
Based on the mapping relations between the DC bus-bar voltage, the demand voltage and the working condition of the pfc circuit, really
Fixed and matched first working condition of the DC bus-bar voltage；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched
For first working condition.
2. the switching method of pfc circuit as described in claim 1, which is characterized in that it is described based on the DC bus-bar voltage,
Mapping relations between the demand voltage and the working condition of the pfc circuit, determination are matched with the DC bus-bar voltage
The first working condition the step of include：
Determine whether the demand voltage is less than the DC bus-bar voltage；
When the demand voltage is greater than or equal to the DC bus-bar voltage, determine that first working condition is high frequency PFC
State.
3. the switching method of pfc circuit as claimed in claim 2, which is characterized in that whether the determination demand voltage
After the step of less than the DC bus-bar voltage, further include：
When the demand voltage is less than the DC bus-bar voltage, determine that first working condition is low frequency PFC states.
4. the switching method of pfc circuit as described in claim 1, which is characterized in that determination first working condition
The whether consistent step of the second current working condition includes with the pfc circuit：
Determine the corresponding PFC frequencies of second working condition and the corresponding default PFC frequencies model of first working condition
It encloses；
Determine the PFC frequencies whether in the default PFC frequency ranges, wherein to be in described pre- in the PFC frequencies
If when except PFC frequency ranges, determining that first working condition, second working condition current with the pfc circuit differs
It causes.
5. the switching method of pfc circuit as claimed in claim 4, which is characterized in that determination second working condition
The step of corresponding PFC frequencies includes：
Sampling operation is carried out to the pfc circuit, to obtain the current waveform of the pfc circuit；
The PFC frequencies are determined according to the current waveform.
6. the switching method of pfc circuit as described in claim 1, which is characterized in that described to obtain the compressor busbar electricity
The step of demand voltage of pressure includes：
Obtain the d shaft voltages and q shaft voltages of the compressor；
The demand voltage is calculated based on the d shaft voltages and the q shaft voltages.
7. the switching method of pfc circuit as claimed in claim 6, which is characterized in that the d axis electricity for obtaining the compressor
Pressure and the step of q shaft voltages include：
The d shaft currents and q shaft currents of the compressor are obtained, and the d axis is calculated separately based on the d shaft currents, q shaft currents
Voltage and the q shaft voltages.
8. the switching method of the pfc circuit as described in any one of claim 1 to 7, which is characterized in that the pfc circuit packet
Include Boost PFC.
9. a kind of air conditioner, which is characterized in that the air conditioner includes：It memory, processor and is stored on the memory
And the changeover program for the pfc circuit that can be run on the processor, the changeover program of the pfc circuit are held by the processor
The step of switching method such as pfc circuit described in any item of the claim 1 to 8 is realized when row.
10. a kind of computer readable storage medium, which is characterized in that be stored with PFC electricity on the computer readable storage medium
It is realized such as any one of claim 1 to 8 institute when the changeover program of the changeover program on road, the pfc circuit is executed by processor
The step of switching method for the pfc circuit stated.
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| CN201810553846.6A CN108736788B (en) | 2018-05-31 | 2018-05-31 | Switching method of PFC circuit, air conditioner and computer readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810553846.6A CN108736788B (en) | 2018-05-31 | 2018-05-31 | Switching method of PFC circuit, air conditioner and computer readable storage medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707919A (en) * | 2019-11-11 | 2020-01-17 | 宁波奥克斯电气股份有限公司 | PFC circuit control method and device and air conditioner |
| CN111720947A (en) * | 2020-06-19 | 2020-09-29 | 海信（山东）空调有限公司 | Method for controlling bus voltage of air conditioner, air conditioner and storage medium |
| CN111800063A (en) * | 2020-07-06 | 2020-10-20 | 青岛海尔空调器有限总公司 | Control method and control device of variable frequency equipment and variable frequency air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030201168A1 (en) * | 2002-04-29 | 2003-10-30 | Chae Seung-Ki | Apparatus for decomposing perfluorinated compounds and system for processing perfluorinated compounds using the apparatus |
| CN102305452A (en) * | 2011-07-15 | 2012-01-04 | 宁波奥克斯电气有限公司 | Control method of operating condition of PFC (Power Factor Corrector) module |
| CN102400899A (en) * | 2010-09-13 | 2012-04-04 | 海尔集团公司 | Control device and control method of air conditioner compressor and variable-frequency air conditioner |
| CN105827120A (en) * | 2016-05-04 | 2016-08-03 | 广东美的暖通设备有限公司 | Air conditioner and control method and device used for staggered PFC circuit of air conditioner |
-
2018
- 2018-05-31 CN CN201810553846.6A patent/CN108736788B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030201168A1 (en) * | 2002-04-29 | 2003-10-30 | Chae Seung-Ki | Apparatus for decomposing perfluorinated compounds and system for processing perfluorinated compounds using the apparatus |
| CN102400899A (en) * | 2010-09-13 | 2012-04-04 | 海尔集团公司 | Control device and control method of air conditioner compressor and variable-frequency air conditioner |
| CN102305452A (en) * | 2011-07-15 | 2012-01-04 | 宁波奥克斯电气有限公司 | Control method of operating condition of PFC (Power Factor Corrector) module |
| CN105827120A (en) * | 2016-05-04 | 2016-08-03 | 广东美的暖通设备有限公司 | Air conditioner and control method and device used for staggered PFC circuit of air conditioner |
Non-Patent Citations (1)
| Title |
|---|
| 李向丽等: "基于单周期控制的双频Boost功率因数校正变换器", 《低压电器》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707919A (en) * | 2019-11-11 | 2020-01-17 | 宁波奥克斯电气股份有限公司 | PFC circuit control method and device and air conditioner |
| CN111720947A (en) * | 2020-06-19 | 2020-09-29 | 海信（山东）空调有限公司 | Method for controlling bus voltage of air conditioner, air conditioner and storage medium |
| CN111800063A (en) * | 2020-07-06 | 2020-10-20 | 青岛海尔空调器有限总公司 | Control method and control device of variable frequency equipment and variable frequency air conditioner |
| CN111800063B (en) * | 2020-07-06 | 2021-08-24 | 重庆海尔空调器有限公司 | Control method and control device of variable frequency equipment and variable frequency air conditioner |
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| CN108736788B (en) | 2020-05-22 |
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