CN104242628B - PFC control methods, device and the air conditioner of AC DC converters - Google Patents
PFC control methods, device and the air conditioner of AC DC converters Download PDFInfo
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- CN104242628B CN104242628B CN201410447105.1A CN201410447105A CN104242628B CN 104242628 B CN104242628 B CN 104242628B CN 201410447105 A CN201410447105 A CN 201410447105A CN 104242628 B CN104242628 B CN 104242628B
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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
Abstract
The invention discloses a kind of PFC control methods of AC DC converters in air conditioner, it comprises the following steps：The output voltage and input current of sampling AC DC converters；Ratio control is integrated to output voltage to obtain the first compensation electric current according to DC reference voltage, and input current is handled to obtain the second compensation electric current；First compensation electric current and the second compensation electric current are overlapped to obtain current compensation amount；According to current compensation amount and output voltage and input current generation control signal, and the switching tube of PFC units is controlled to adjust the output voltage of AC DC converters according to control signal.The PFC control methods can efficiently reduce the fluctuation of the output voltage of AC DC converters and reduce current ripples, realize the life-span of increase AC DC converter output terminal electric capacity.The invention also discloses the PFC control devices and a kind of air conditioner of AC DC converters in a kind of air conditioner.
Description
Technical field
The present invention relates to PFC (Power Factor Correction, PFC) technical field, more particularly to
In a kind of air conditioner in the PFC control methods of AC-DC converter, a kind of air conditioner the PFC control devices of AC-DC converter and
A kind of air conditioner with the PFC control devices.
Background technology
As a large amount of power electronic products access power network, substantial amounts of harmonic current is generated to power network, and substantial amounts of harmonic wave
Electric current will produce very big harm to this electricity system.With the continuous popularization of convertible frequency air-conditioner, the harmonic wave of air-conditioning, air-conditioning
Power factor will meet certain standard.
At present, air conditioner typically uses single-rotor compressor, will cause single rotor pressure because load torque fluctuation is bigger
There is larger fluctuation in the DC voltage of contracting machine, and has larger ripple, and the voltage fluctuated will influence air-conditioner control system
Reliability, simultaneously because the presence of DC side bulky capacitor, voltage ripple will produce big ripple current, and big ripple current will
Temperature rise is produced on electric capacity, so that the electric capacity life-span can be reduced.
The content of the invention
The purpose of the present invention is intended at least solve above-mentioned technological deficiency to a certain extent.
Therefore, first purpose of the present invention is the PFC for proposing AC-DC converter in a kind of air conditioner
PFC control methods, can efficiently reduce the fluctuation of the output voltage of AC-DC converter and reduce current ripples, realize increase
The life-span of AC-DC converter output capacitor.
Second object of the present invention is the PFC control devices for proposing AC-DC converter in a kind of air conditioner.The present invention
The 3rd purpose be to propose a kind of air conditioner.
To reach the power of AC-DC converter in above-mentioned purpose, a kind of air conditioner that one aspect of the present invention embodiment is proposed
Factor correcting PFC control methods, comprise the following steps：The output voltage and input current for the AC-DC converter of sampling；According to
DC reference voltage is integrated ratio IP controls to the output voltage to obtain the first compensation electric current, and to the input electricity
Stream is handled to obtain the second compensation electric current；Described first compensation electric current and the second compensation electric current are overlapped to obtain
Obtain current compensation amount；According to the current compensation amount and the output voltage and input current generation control signal, and according to
The control signal is controlled to adjust the AC-DC converter to the switching tube of PFC units in the AC-DC converter
Output voltage.
PFC control methods according to embodiments of the present invention, carry out IP controls by the output voltage to AC-DC converter and obtain
The first compensation electric current is obtained, and it is that AC-DC becomes to carry out processing to obtain the second compensation electric current by the input current to AC-DC converter
The output current of parallel operation, is obtained after the output current that the first compensation electric current and the second compensation electric current are AC-DC converter is superimposed
Current compensation amount, generates control signal to control opening for PFC units according to current compensation amount and output voltage and input current
The break-make of pipe is closed, realizes and the output voltage of AC-DC converter is adjusted, so as to reduce the fluctuation of output voltage.Therefore, originally
The PFC control methods of inventive embodiments are it is contemplated that the fluctuation of load situation of air conditioner will cause the defeated of AC-DC converter
Go out curent change, the electricity that the electric current of change is the second compensation electric current and obtained by being integrated ratio to control to output voltage
Stream i.e. the first compensation electric current is compensated as feedback quantity, is efficiently reduced the fluctuation of the output voltage of AC-DC converter and is dropped
Low current ripple, the efficiency of air-conditioner control system is increased while improving the output capacitor life-span of AC-DC converter.
According to one embodiment of present invention, before IP controls are carried out to the output voltage, also to the output electricity
Pressure carries out low-pass filtering treatment.
According to one embodiment of present invention, after the first compensation electric current is obtained, also to the described first compensation electricity
Stream carries out amplitude limiting processing.
According to one embodiment of present invention, the first compensation electric current is calculated according to below equation：
Wherein, I1For the described first compensation electric current, VrefFor the DC reference voltage, VoutFor the output voltage, KiFor
Integral coefficient, KpFor proportionality coefficient.
According to one embodiment of present invention, the input current is handled and specifically wrapped with obtaining the second compensation electric current
Include：Processing is taken absolute value to the input current to obtain the first electric current；To first electric current carry out low-pass filtering treatment with
Obtain the second electric current；The second compensation electric current is obtained according to second electric current.
Wherein, the second compensation electric current is calculated according to below equation：
Idc_in=(1-D) KIin
Wherein, Idc_inFor the described second compensation electric current, D is the dutycycle of the control switching tube, IinFor the described second electricity
Stream, K is gain constant.
To reach the PFC of AC-DC converter in above-mentioned purpose, a kind of air conditioner that another aspect of the present invention embodiment is proposed
Control device, including：Voltage sample module, the output voltage for the AC-DC converter of sampling；Current sample module, is used
In the input current for the AC-DC converter of sampling；First compensation electric current acquisition module, for according to DC reference voltage to institute
Output voltage is stated to carry out IP controls to obtain the first compensation electric current；Second compensation electric current acquisition module, for the input electricity
Stream is handled to obtain the second compensation electric current；Laminating module, for the described first compensation electric current and second compensation is electric
Stream is overlapped to obtain current compensation amount；PFC control module, for according to the current compensation amount and the output voltage
Control signal is generated with input current, and the switching tube of PFC units in the AC-DC converter is entered according to the control signal
Row controls to adjust the output voltage of the AC-DC converter.
PFC control devices according to embodiments of the present invention, the first compensation electric current acquisition module passes through to AC-DC converter
Output voltage carries out IP controls and obtains the first compensation electric current, and the second compensation electric current acquisition module passes through to the defeated of AC-DC converter
Enter electric current and carry out processing acquisition the second compensation electric current i.e. output current of AC-DC converter, laminating module compensates electric current by first
Current compensation amount is obtained after being superimposed with the output current that the second compensation electric current is AC-DC converter, PFC control module is according to electric current
Compensation rate and output voltage and input current generation control signal are realized to AC- with controlling the break-make of the switching tube of PFC units
The output voltage of DC converters is adjusted, so as to reduce the fluctuation of output voltage.Therefore, the PFC controls of the embodiment of the present invention
Device is it is contemplated that the fluctuation of load situation of air conditioner will cause the output current of AC-DC converter to change, by change
I.e. the first compensation electric current of electric current that electric current is the second compensation electric current and obtained by being integrated ratio control to output voltage is made
Compensated for feedback quantity, efficiently reduce the fluctuation of the output voltage of AC-DC converter and reduce current ripples, improve AC-
Increase the efficiency of air-conditioner control system while the output capacitor life-span of DC converters.
According to one embodiment of present invention, the first compensation electric current acquisition module is carrying out IP to the output voltage
Before control, it is additionally operable to carry out low-pass filtering treatment to the output voltage.
According to one embodiment of present invention, the first compensation electric current acquisition module is obtaining the first compensation electric current
Afterwards, it is additionally operable to carry out amplitude limiting processing to the described first compensation electric current.
According to one embodiment of present invention, the first compensation electric current acquisition module calculates described the according to below equation
One compensation electric current：
Wherein, I1For the described first compensation electric current, VrefFor the DC reference voltage, VoutFor the output voltage, KiFor
Integral coefficient, KpFor proportionality coefficient.
According to one embodiment of present invention, the second compensation electric current acquisition module is specifically included：First electric current is obtained
Unit, is handled to obtain the first electric current for being taken absolute value to the input current；Low-pass filter unit, for described first
Electric current carries out low-pass filtering treatment to obtain the second electric current；Second compensation electric current acquiring unit, for according to second electric current
Obtain the second compensation electric current.
Wherein, the second compensation electric current acquiring unit calculates the second compensation electric current according to below equation：
Idc_in=(1-D) KIin
Wherein, Idc_inFor the described second compensation electric current, D is the dutycycle of the control switching tube, IinFor the described second electricity
Stream, K is gain constant.
In addition, embodiments of the invention also proposed a kind of air conditioner, it includes above-mentioned PFC control devices.
Air conditioner according to embodiments of the present invention, it is contemplated that fluctuation of load situation will cause AC-DC converter
Output current changes, and is the second compensation electric current and by AC-DC converter by the electric current of change by PFC control devices
Output voltage is integrated ratio and controls obtained electric current i.e. the first compensation electric current to be compensated as feedback quantity, efficiently reduces
The fluctuation of the output voltage of AC-DC converter and reduce current ripples, improve AC-DC converter the output capacitor life-span it is same
The efficiency of Shi Zengjia air-conditioner control systems.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein：
Fig. 1 is the flow chart of the PFC control methods of AC-DC converter in the air conditioner according to the embodiment of the present invention；
Fig. 2 is the PFC control principle block diagrams of AC-DC converter in the air conditioner according to one embodiment of the invention；
Fig. 3 is the output voltage waveforms contrast schematic diagram according to a specific example of the invention；And
Fig. 4 is the block diagram of the PFC control devices of AC-DC converter in the air conditioner according to the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only merely illustrative, and
Purpose does not lie in the limitation present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is the relation between itself not indicating discussed various embodiments and/or setting for purposes of simplicity and clarity again.This
Outside, the invention provides various specific techniques and material example, but those of ordinary skill in the art can be appreciated that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
" on " structure can include the first and second features and be formed as the embodiment that directly contacts, other feature shape can also be included
Into the embodiment between the first and second features, such first and second feature may not be direct contact.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection or the connection of two element internals, can
To be to be joined directly together, it can also be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
Controlled with reference to the accompanying drawings to describe the PFC of AC-DC converter in the air conditioner proposed according to embodiments of the present invention
The PFC control devices of AC-DC converter and the air conditioner with the PFC control devices in method, air conditioner.
Fig. 1 is the flow chart of the PFC control methods of AC-DC converter in the air conditioner according to the embodiment of the present invention.Such as Fig. 1
Shown, the PFC control methods of AC-DC converter comprise the following steps in the air conditioner：
S1, the output voltage and input current of AC-DC converter of sampling.
S2, IP (Integral Proportional integrate ratio) control is carried out to output voltage according to DC reference voltage
System is handled input current to obtain the second compensation electric current to obtain the first compensation electric current.
Wherein, in an embodiment of the present invention, it is necessary to which explanation, can obtain the by carrying out processing to input current
Two compensation electric currents are the output current of AC-DC converter, can also directly sample and obtain the output current of AC-DC converter.
S3, the first compensation electric current and the second compensation electric current are overlapped to obtain current compensation amount.
S4, control signal is generated according to current compensation amount and output voltage and input current, and according to control signal pair
The switching tube of PFC units is controlled to adjust the output voltage of AC-DC converter in AC-DC converter, realizes and reduces output
The fluctuation of voltage, reaches the purpose of the output capacitor ripple current of reduction AC-DC converter.
According to one embodiment of present invention, as shown in Fig. 2 switching tube can be IGBT, control signal can be PWM letters
Number.
As shown in Fig. 2 after sampling obtains the output voltage and input current of AC-DC converter, first, using LPF
(Low Pass Filter, low pass filter) carries out low-pass filtering treatment, main purpose to the output voltage of AC-DC converter
Be filter out Boost circuit in AC-DC converter circuit (i.e. PFC units), higher hamonic wave present in rectifier and circuit into
Point.That is, before IP controls are carried out to the output voltage, also carrying out low-pass filtering treatment to the output voltage.
Secondly, carry out IP controls to the output voltage after low-pass filtering treatment to obtain the according to DC reference voltage
One compensation electric current.According to one embodiment of present invention, the first compensation electric current is calculated according to below equation：
Wherein, I1For the described first compensation electric current, VrefFor the DC reference voltage, VoutFor the output voltage, KiFor
Integral coefficient, KpFor proportionality coefficient.
Also, as shown in Figure 2, in addition it is also necessary to which the first compensation electric current obtained to calculating carries out amplitude limiting processing.That is, root
According to one embodiment of the present of invention, after the first compensation electric current is obtained, amplitude limit also is carried out to the described first compensation electric current
Processing.
Simultaneously, it is contemplated that the fluctuation of load situation of air conditioner will cause the output current of AC-DC converter to change, this hair
The PFC control methods of bright embodiment use the PFC control strategies for injecting AC-DC converter DC side output current, i.e., to AC-
The input current of DC converters is handled to obtain the second compensation electric current i.e. output current of AC-DC converter, and second is mended
The output current injection for repaying the i.e. AC-DC converter of electric current is compensated.
Specifically, according to one embodiment of present invention, as shown in Fig. 2 being handled the input current to obtain
Second compensation electric current includes：Processing is taken absolute value to the input current to obtain the first electric current；First electric current is carried out
Low-pass filtering treatment is to obtain the second electric current；The second compensation electric current is obtained according to second electric current.
Wherein, the second compensation electric current is calculated according to below equation：
Idc_in=(1-D) KIin (2)
Wherein, Idc_inFor the described second compensation electric current, D is the dutycycle of the control switching tube, IinFor the described second electricity
Stream, K is gain constant.
That is, second compensation electric current be AC-DC converter output current and AC-DC converter input current it
Between relation can be expressed by the way that Boost circuit (i.e. PFC units) relational expression in AC-DC converter is formula (2), this is with regard to root
The output current for obtaining AC-DC converter can be just calculated according to the input current of AC-DC converter, is adopted without being further added by an electric current
Sample circuit, reduces hardware cost input.In an embodiment of the present invention, it can be adjusted and increased according to the load situation of change of air conditioner
Beneficial COEFFICIENT K reduces the purpose of output voltage fluctuation to reach, and can also improve the response speed of whole system.
As shown in Fig. 2 the first compensation electric current and the second compensation electric current are overlapped to obtain current compensation amount B, as
One of importation of PFC control module, current compensation amount B is obtained according to below equation：
Then, it can be calculated according to current compensation amount B and by the output voltage after low-pass filtering treatment and the second electric current
Dutycycle after being compensated, IGBT break-make, realization pair are controlled finally according to the pwm signal corresponding to the dutycycle after compensation
The output voltage of AC-DC converter is adjusted, and reaches the purpose of optimization system control.
Specifically, according to the example of the present invention, the AC-DC converter after the regulation of above-mentioned PFC control methods is passed through
Output voltage waveforms are as shown in Figure 3.From figure 3, it can be seen that regulation after AC-DC converter output voltage waveforms amplitude
Reduction, voltage change ratio is also reduced, and can thus reach the purpose for reducing harmonic wave ripple current.
PFC control methods according to embodiments of the present invention, carry out IP controls by the output voltage to AC-DC converter and obtain
The first compensation electric current is obtained, and it is that AC-DC becomes to carry out processing to obtain the second compensation electric current by the input current to AC-DC converter
The output current of parallel operation, is obtained after the output current that the first compensation electric current and the second compensation electric current are AC-DC converter is superimposed
Current compensation amount, generates control signal to control opening for PFC units according to current compensation amount and output voltage and input current
The break-make of pipe is closed, realizes and the output voltage of AC-DC converter is adjusted, so as to reduce the fluctuation of output voltage.Therefore, originally
The PFC control methods of inventive embodiments are it is contemplated that the fluctuation of load situation of air conditioner will cause the defeated of AC-DC converter
Go out curent change, the electricity that the electric current of change is the second compensation electric current and obtained by being integrated ratio to control to output voltage
Stream i.e. the first compensation electric current is compensated as feedback quantity, is efficiently reduced the fluctuation of the output voltage of AC-DC converter and is dropped
Low current ripple, the efficiency of air-conditioner control system is increased while improving the output capacitor life-span of AC-DC converter.
Fig. 4 is the block diagram of the PFC control devices of AC-DC converter in the air conditioner according to the embodiment of the present invention.
As shown in figure 4, the PFC control devices of AC-DC converter include voltage sample module (not shown), electric current in the air conditioner
Sampling module (not shown), the first compensation electric current acquisition module 30, second compensate electric current acquisition module 40, laminating module 50
With PFC control module 60.
Wherein, output voltage of the voltage sample module for AC-DC converter of sampling, current sample module is used to sample
The input current of AC-DC converter；First compensation electric current acquisition module 30 is used for according to DC reference voltage to the output electricity
Pressure carries out IP controls to obtain the first compensation electric current, and the second compensation electric current acquisition module 40 is used for the input current
Manage to obtain the second compensation electric current；Laminating module 50 is used to be folded in the described first compensation electric current and the second compensation electric current
Current compensation amount is obtained, PFC control module 60 is used for according to the current compensation amount and the output voltage and input
Electric current generates control signal, and the switching tube of PFC units 101 in the AC-DC converter is carried out according to the control signal
Control to adjust the output voltage of the AC-DC converter.
According to one embodiment of present invention, the first compensation electric current acquisition module 30 is carrying out IP controls to the output voltage
Before system, it is additionally operable to carry out low-pass filtering treatment to the output voltage, filters out in AC-DC converter circuit Boost circuit (i.e.
PFC units), higher harmonic component present in rectifier and circuit.
Also, the first compensation electric current acquisition module 30 is after the first compensation electric current is obtained, it is additionally operable to described the
One compensation electric current carries out amplitude limiting processing.
According to one embodiment of present invention, the first compensation electric current acquisition module 30 calculates described first according to below equation
Compensate electric current：
Wherein, I1For the described first compensation electric current, VrefFor the DC reference voltage, VoutFor the output voltage, KiFor
Integral coefficient, KpFor proportionality coefficient.
Specifically, as shown in figure 4, the second compensation electric current acquisition module 40 is specifically included：First electric current acquiring unit 401,
The compensation electric current of low-pass filter unit 402 and second acquiring unit 403.Wherein, the first electric current acquiring unit 401 is used for described defeated
Enter electric current to take absolute value processing to obtain the first electric current；Low-pass filter unit 402 is used to carry out low pass filtered to first electric current
Ripple handles to obtain the second electric current；Second compensation electric current acquiring unit 403 is used to obtain described second according to second electric current
Compensate electric current.
Wherein, the second compensation electric current acquiring unit 403 calculates the second compensation electric current according to below equation：
Idc_in=(1-D) KIin
Wherein, Idc_inFor the described second compensation electric current, D is the dutycycle of the control switching tube, IinFor the described second electricity
Stream, K is gain constant.
PFC control devices according to embodiments of the present invention, the first compensation electric current acquisition module passes through to AC-DC converter
Output voltage carries out IP controls and obtains the first compensation electric current, and the second compensation electric current acquisition module passes through to the defeated of AC-DC converter
Enter electric current and carry out processing acquisition the second compensation electric current i.e. output current of AC-DC converter, laminating module compensates electric current by first
Current compensation amount is obtained after being superimposed with the output current that the second compensation electric current is AC-DC converter, PFC control module is according to electric current
Compensation rate and output voltage and input current generation control signal are realized to AC- with controlling the break-make of the switching tube of PFC units
The output voltage of DC converters is adjusted, so as to reduce the fluctuation of output voltage.Therefore, the PFC controls of the embodiment of the present invention
Device is it is contemplated that the fluctuation of load situation of air conditioner will cause the output current of AC-DC converter to change, by change
I.e. the first compensation electric current of electric current that electric current is the second compensation electric current and obtained by being integrated ratio control to output voltage is made
Compensated for feedback quantity, efficiently reduce the fluctuation of the output voltage of AC-DC converter and reduce current ripples, improve AC-
Increase the efficiency of air-conditioner control system while the output capacitor life-span of DC converters.
In addition, embodiments of the invention also proposed a kind of air conditioner, it includes above-mentioned PFC control devices.
Air conditioner according to embodiments of the present invention, it is contemplated that fluctuation of load situation will cause AC-DC converter
Output current changes, and is the second compensation electric current and by AC-DC converter by the electric current of change by PFC control devices
Output voltage is integrated ratio and controls obtained electric current i.e. the first compensation electric current to be compensated as feedback quantity, efficiently reduces
The fluctuation of the output voltage of AC-DC converter and reduce current ripples, improve AC-DC converter the output capacitor life-span it is same
The efficiency of Shi Zengjia air-conditioner control systems.
Any process described otherwise above or method description are construed as in flow chart or herein, represent to include
Module, fragment or the portion of the code of one or more executable instructions for the step of realizing specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown or discussion suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress for combining these instruction execution systems, device or equipment and using
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wirings
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program thereon or other are suitable for computer-readable medium
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Rapid to can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as
Fruit is realized using in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (11)
1. the PFC PFC control methods of AC-DC converter in a kind of air conditioner, it is characterised in that including following step
Suddenly：
The output voltage and input current for the AC-DC converter of sampling；
Ratio IP controls are integrated to the output voltage to obtain the first compensation electric current according to DC reference voltage, and to institute
Input current is stated to be handled to obtain the second compensation electric current, wherein, the input current is handled to obtain the second benefit
Electric current is repaid to specifically include：Processing is taken absolute value to the input current to obtain the first electric current；First electric current is carried out low
Pass filter handles to obtain the second electric current；The second compensation electric current is obtained according to second electric current；
Described first compensation electric current and the second compensation electric current are overlapped to obtain current compensation amount；
According to the current compensation amount and the output voltage and input current generation control signal, and believed according to the control
Number the switching tubes of PFC units in the AC-DC converter is controlled to adjust the output voltage of the AC-DC converter.
2. PFC control methods as claimed in claim 1, it is characterised in that before IP controls are carried out to the output voltage,
Low-pass filtering treatment also is carried out to the output voltage.
3. PFC control methods as claimed in claim 1, it is characterised in that also right after the first compensation electric current is obtained
The first compensation electric current carries out amplitude limiting processing.
4. PFC control methods as claimed in claim 1, it is characterised in that the first compensation electricity is calculated according to below equation
Stream：
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<mi>s</mi>
</mfrac>
<mo>-</mo>
<msub>
<mi>K</mi>
<mi>p</mi>
</msub>
<mo>*</mo>
<msub>
<mi>V</mi>
<mrow>
<mi>o</mi>
<mi>u</mi>
<mi>t</mi>
</mrow>
</msub>
</mrow>
Wherein, I1For the described first compensation electric current, VrefFor the DC reference voltage, VoutFor the output voltage, KiFor integration
Coefficient, KpFor proportionality coefficient.
5. PFC control methods as claimed in claim 1, it is characterised in that the second compensation electricity is calculated according to below equation
Stream：
Idc_in=(1-D) KIin
Wherein, Idc_inFor the described second compensation electric current, D is the dutycycle of the control switching tube, IinFor second electric current, K
For gain constant.
6. the PFC control devices of AC-DC converter in a kind of air conditioner, it is characterised in that including：
Voltage sample module, the output voltage for the AC-DC converter of sampling；
Current sample module, the input current for the AC-DC converter of sampling；
First compensation electric current acquisition module, for carrying out IP controls to the output voltage according to DC reference voltage to obtain the
One compensation electric current；
Second compensation electric current acquisition module, for being handled the input current to obtain the second compensation electric current, wherein, institute
The second compensation electric current acquisition module is stated to specifically include：First electric current acquiring unit, for the place that taken absolute value to the input current
Manage to obtain the first electric current；Low-pass filter unit, it is electric to obtain second for carrying out low-pass filtering treatment to first electric current
Stream；Second compensation electric current acquiring unit, for obtaining the second compensation electric current according to second electric current；
Laminating module, for the described first compensation electric current and the second compensation electric current to be overlapped to obtain current compensation
Amount；
PFC control module, for generating control signal according to the current compensation amount and the output voltage and input current,
And the switching tube of PFC units in the AC-DC converter is controlled according to the control signal to adjust the AC-DC changes
The output voltage of parallel operation.
7. PFC control devices as claimed in claim 6, it is characterised in that the first compensation electric current acquisition module is to institute
State before output voltage progress IP controls, be additionally operable to carry out low-pass filtering treatment to the output voltage.
8. PFC control devices as claimed in claim 6, it is characterised in that the first compensation electric current acquisition module is being obtained
After the first compensation electric current, it is additionally operable to carry out amplitude limiting processing to the described first compensation electric current.
9. PFC control devices as claimed in claim 6, it is characterised in that the first compensation electric current acquisition module according to
Lower formula calculates the first compensation electric current：
<mrow>
<msub>
<mi>I</mi>
<mn>1</mn>
</msub>
<mo>=</mo>
<mrow>
<mo>(</mo>
<msub>
<mi>V</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>V</mi>
<mrow>
<mi>o</mi>
<mi>u</mi>
<mi>t</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mfrac>
<msub>
<mi>K</mi>
<mi>i</mi>
</msub>
<mi>s</mi>
</mfrac>
<mo>-</mo>
<msub>
<mi>K</mi>
<mi>p</mi>
</msub>
<mo>*</mo>
<msub>
<mi>V</mi>
<mrow>
<mi>o</mi>
<mi>u</mi>
<mi>t</mi>
</mrow>
</msub>
</mrow>
Wherein, I1For the described first compensation electric current, VrefFor the DC reference voltage, VoutFor the output voltage, KiFor integration
Coefficient, KpFor proportionality coefficient.
10. PFC control devices as claimed in claim 6, it is characterised in that the second compensation electric current acquiring unit according to
Lower formula calculates the second compensation electric current：
Idc_in=(1-D) KIin
Wherein, Idc_inFor the described second compensation electric current, D is the dutycycle of the control switching tube, IinFor second electric current, K
For gain constant.
11. a kind of air conditioner, it is characterised in that including the PFC control devices as any one of claim 6-10.
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| CN201410447105.1A CN104242628B (en) | 2014-09-03 | 2014-09-03 | PFC control methods, device and the air conditioner of AC DC converters |
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| CN106160433B (en) * | 2015-03-25 | 2018-11-27 | 国家能源投资集团有限责任公司 | It is a kind of for controlling the feedback system and energy-storage system of current transformer |
| CN107370358B (en) * | 2016-05-13 | 2021-03-02 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Current loop control method of power factor correction circuit and current loop controller |
| CN109442669B (en) * | 2018-11-12 | 2020-11-24 | 奥克斯空调股份有限公司 | Air conditioner control method and device and air conditioner |
| WO2020107956A1 (en) * | 2018-11-30 | 2020-06-04 | 广东美的制冷设备有限公司 | Operation control method and system, and compressor, air conditioner and readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102187559A (en) * | 2008-11-25 | 2011-09-14 | 株式会社村田制作所 | PFC converter |
| CN102857087A (en) * | 2012-09-17 | 2013-01-02 | 海信（山东）空调有限公司 | Adaptive control method of power factor |
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| WO2006013557A2 (en) * | 2004-08-02 | 2006-02-09 | Green Power Technologies Ltd. | Method and control circuitry for improved-performance switch-mode converters |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102187559A (en) * | 2008-11-25 | 2011-09-14 | 株式会社村田制作所 | PFC converter |
| CN102857087A (en) * | 2012-09-17 | 2013-01-02 | 海信（山东）空调有限公司 | Adaptive control method of power factor |
Non-Patent Citations (1)
| Title |
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| 基于dsPIC的数字控制PFC研究;周福星，谢运祥;《通信电源技术》;20090125;第26卷(第1期);第6-9页 * |
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