CN108123593A - Pfc circuit, electric machine control system and transducer air conditioning - Google Patents
Pfc circuit, electric machine control system and transducer air conditioning Download PDFInfo
- Publication number
- CN108123593A CN108123593A CN201810093556.8A CN201810093556A CN108123593A CN 108123593 A CN108123593 A CN 108123593A CN 201810093556 A CN201810093556 A CN 201810093556A CN 108123593 A CN108123593 A CN 108123593A
- Authority
- CN
- China
- Prior art keywords
- value
- current
- voltage
- bus
- pfc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 40
- 230000005611 electricity Effects 0.000 claims description 19
- 230000001939 inductive effect Effects 0.000 claims description 14
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 235000013350 formula milk Nutrition 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 14
- 238000004146 energy storage Methods 0.000 description 7
- 230000002459 sustained effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 101100293261 Mus musculus Naa15 gene Proteins 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- 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]
-
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/085—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
-
- 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 present invention provides a kind of pfc circuit, electric machine control system and transducer air conditioning, electric machine control system is by including reactor, rectification part, current detecting part, filter circuit, alternating voltage sampling unit, DC voltage sampling unit and calculation control unit composition, and rectification part is formed in parallel by including the rectification unit that two rectifier diodes are connected and the switch unit that two switching tubes are connected, full-wave rectifying circuit is formed with this, calculation control unit includes PFC calculation control units, by the DC bus-bar voltage set-point for obtaining motor operation, and according to AC-input voltage value, d-c bus voltage value, the switching tube work of DC bus current value and DC bus-bar voltage set-point generation PFC duty cycle of switching signal driving rectification part, to carry out Active PFC to the alternating current of input.The relatively existing pfc circuit of the pfc circuit of the embodiment of the present invention can effectively improve efficiency, reduce common mode noise, and the reliability of entire electric machine control system is improved with this.
Description
Technical field
The present invention relates to convertible frequency air-conditioner technical field more particularly to pfc circuit, electric machine control system and transducer air conditionings.
Background technology
In order to tackle household appliances power conservation requirement, convertible frequency air-conditioner is developed rapidly, and active power factor correction is
It is widely used in convertible frequency air-conditioner electric control part.The automatically controlled power factor correction portion of major part convertible frequency air-conditioner uses Boost at present
(boosting) type circuit after electric current flows through rectifier bridge, supplies motor inverter, the electricity of this type after inductance and diode
It is that AC-DC (AC-DC) transfer efficiency is relatively low to control shortcoming；Or there is a kind of PFC (Active PFC) of no bridge mode
Circuit, although the pfc circuit of this no bridge mode improves AC-DC transfer efficiencies to a certain extent, but there are common-mode noises
The problem of big.
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.
The content of the invention
It is a primary object of the present invention to provide a kind of pfc circuit, electric machine control system and transducer air conditioning, it is therefore intended that
Solve the problems, such as that there are transfer efficiency is relatively low or common-mode noise is big in existing pfc circuit.
To achieve the above object, a kind of pfc circuit provided by the invention, the pfc circuit include reactor, rectification part,
Current detecting part, filter circuit, alternating voltage sampling unit, DC voltage sampling unit and calculation control unit；The reactor connection
The input terminal of AC power, the reactor and rectification part are connected in ac power supply circuit；The rectification part output terminal connection
Dc bus, the filter circuit are connected by the dc bus with the rectification part；The current detecting part is connected on institute
It states on dc bus；
The rectification part includes the first diode, the second diode and the first switch pipe and for carrying fly-wheel diode
Two switching tubes, the L lines of points of common connection and AC power after first diode and the second Diode series connect；It is described
The N lines of points of common connection and AC power after first switch pipe and the series connection of second switch pipe connect；The first switch pipe and
One end after the series connection of second switch pipe connects first diode cathode, after the first switch pipe and second switch pipe are connected
The other end connect second diode anode, the control terminal of the first switch pipe and second switch pipe connects described respectively
Calculation control unit；Wherein
The current detecting part obtains corresponding DC bus current value for detecting the DC bus current；Institute
It states filter circuit and carries out smothing filtering for the direct current to rectification module output to export DC bus-bar voltage；The friendship
Galvanic electricity pressure sampling unit obtains corresponding AC-input voltage value for detecting AC-input voltage；The DC voltage sampling
Portion obtains corresponding d-c bus voltage value for detecting the DC bus-bar voltage；
The calculation control unit includes PFC calculation control units, and the PFC calculation control units are used to obtain the straight of motor operation
Busbar voltage set-point is flowed, and according to the AC-input voltage value, the d-c bus voltage value, the DC bus current
Value and DC bus-bar voltage set-point generation PFC duty cycle of switching signal drive the switching tube work of the rectification part,
To carry out Active PFC to the alternating current of the input.
Preferably, the current detecting part is connected between the rectification part and the filter circuit, by described in detection
DC bus current determines the current value by the reactor.
Preferably, current detecting part is carried out in the intermediate time that the first switch pipe or the second switch pipe are closed
Current sample.
Preferably, the electric machine control system includes phase current sampling portion and inverter；
The phase current sampling portion is used to sample the phase current signal of the motor and is input to the motor operation control
Portion；
The inverter input terminal connects the dc bus, and the inverter output end connects motor；
The calculation control unit further includes motor calculation control unit, and the motor calculation control unit is used for according to the direct current
The rotating speed of target value of bus voltage value, the phase current signal of the motor and the motor calculates generation pulse width signal,
The calculation control unit also generates triangle carrier signal, and is generated according to the triangle carrier signal and the pulse width signal
Pwm control signal is to the inverter, to drive the motor operation.
Preferably, the motor calculation control unit includes：
Location/velocity estimation module, the rotor angle for being estimated to obtain motor for the rotor-position to motor are estimated
Evaluation and motor speed estimate；
Q axis gives current value computing module, for calculating Q axis according to motor rotating speed of target value, motor speed estimate and giving
Constant current value；
D axis gives current value computing module, for the maximum output voltage and the output voltage of inverter according to inverter
Amplitude calculates D axis and gives current value；
Current control module, for giving current value according to the Q axis, the D axis gives current value, the motor speed
It estimate, the d-c bus voltage value and the phase current values of motor sampling calculate generates the pulse width and believes
Number, and the pwm control signal is generated to the inverter according to the triangle carrier signal and the pulse width signal, with
Drive the motor operation.
Preferably, the D axis gives current value computing module and includes：
Weak magnetic controller, for the maximum output voltage to the inverter and the inverter output voltage amplitude into
Row is calculated gives current value initial value to obtain D axis；
Clipping unit gives electricity for giving current value initial value progress amplitude limiting processing to the D axis to obtain the D axis
Flow valuve.
Preferably, the current control module further includes：
Q shaft currents value and D shaft current value computing units, for according to the phase current values and angle estimation value progress
The Q shaft currents value and the D shaft currents value is calculated.
Preferably, the current control module is additionally operable to：
The phase current values of motor operation are obtained, and transfer the first phase current values to prestore and the second phase current values difference
Corresponding first Q axle inductances, the 2nd Q axle inductances value and the first D axle inductances, the 2nd D axle inductance values, according to the phase current values
And first phase current values and second phase current values, the first Q axle inductances, the 2nd Q axle inductances value and
The first D axle inductances, the 2nd D axle inductances value calculate Q axle inductances and D axle inductance values.
Preferably, the PFC calculation control units include weak magnetic critical voltage computing module, AC voltage parameter determines mould
It block, weak magnetic critical voltage value clipping module, inductor current value computing module, PFC switching signal duty cycle computing modules and opens
OFF signal generation module；Wherein
The weak magnetic critical voltage value computing module, for according to the Q axis given voltage value, the D axis given voltage
Weak magnetic critical voltage value during motor operation is calculated in value and index of modulation Kmax；
The AC voltage parameter determining module, for the AC-input voltage value gathered according to alternating voltage sampling unit,
Calculate that respectively obtain AC-input voltage polarity mark signal, AC-input voltage virtual value, AC-input voltage absolute
Value and zero passage detection signal；
The weak magnetic critical voltage value clipping module is described straight for being obtained to weak magnetic critical voltage value progress amplitude limit
Flow busbar voltage set-point；
The inductive current set-point computing module, for female according to the DC bus-bar voltage set-point and the direct current
Line voltage value carries out that the inductive current set-point is calculated；
The inductor current value computing module, for the inductive current to be calculated according to the DC bus current value
Value；
The PFC switching signals duty cycle computing module, for according to the inductive current set-point and inductance electricity
The PFC switching signals duty cycle signals are calculated in flow valuve；
The switching signal generation module, for according to the PFC switching signals duty cycle signals, AC-input voltage pole
Switching signal is calculated to control the first switch pipe or described in property beacon signal and alternating voltage zero-crossing signal
Two switching tube switchs.
To achieve the above object, the present invention also provides a kind of electric machine control system, including the pfc circuit.
To achieve the above object, the present invention also provides a kind of transducer air conditioning, including the electric machine control system.
Pfc circuit provided by the invention applied to electric machine control system, by including reactor, rectification part, current detecting
Portion, filter circuit, alternating voltage sampling unit, DC voltage sampling unit and calculation control unit composition, and rectification part is by including two
The rectification unit of rectifier diode series connection and the switch unit of two switching tube series connection are formed in parallel, and full-wave rectification electricity is formed with this
Road, calculation control unit includes PFC calculation control units, by obtaining the DC bus-bar voltage set-point of motor operation, and according to friendship
Stream input voltage value, d-c bus voltage value, DC bus current value and DC bus-bar voltage set-point generation PFC switches account for
Sky works than the switching tube of signal driving rectification part, to carry out Active PFC to the alternating current of input.The embodiment of the present invention
The relatively existing pfc circuit of pfc circuit can effectively improve efficiency, reduce common mode noise, improving entire motor with this controls
The reliability of system.
Description of the drawings
Fig. 1 is the electrical block diagram of pfc circuit first embodiment of the present invention；
Fig. 2 is another electrical block diagram of pfc circuit first embodiment of the present invention；
Fig. 3 is current loop schematic diagram of the electric current from the reactors of L lines in energy storage in first embodiment；
Fig. 4 is the current loop schematic diagram that electric current charges to electrolytic capacitor from L lines in first embodiment；
Fig. 5 is current loop schematic diagram of the electric current from the reactors of N lines in energy storage in first embodiment；
Fig. 6 is the current loop schematic diagram that electric current charges to electrolytic capacitor from N lines in first embodiment；
Fig. 7 is the sine wave modulation waveform diagram of the pwm signal of the control inverter in first embodiment；
Fig. 8 is the pwm signal of control inverter and the correspondence of isosceles triangle carrier signal in first embodiment
Schematic diagram；
Fig. 9 is the 51 output pwm signal waveform of PFC calculation control units and alternating current of pfc circuit second embodiment of the present invention
Flow waveform diagram；
Figure 10 is the motor calculation control unit high-level schematic functional block diagram of pfc circuit 3rd embodiment of the present invention；
Figure 11 be motor D axle inductances and Q axle inductances with electric current change curve；
Figure 12 is the PFC calculation control unit high-level schematic functional block diagrams of pfc circuit fourth embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is 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 has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
With reference to Fig. 1, Fig. 1 is the pfc circuit structure diagram that first embodiment of the invention provides, for convenience of description, only
Show with the relevant part of the embodiment of the present invention, details are as follows：
The PFC of the embodiment of the present invention be applied to electric machine control system, including reactor L, rectification part 4, current detecting part 3,
Filter circuit 7, alternating voltage sampling unit 2, DC voltage sampling unit 6 and calculation control unit 5；Wherein
The input terminal of reactor L connections AC power 1, reactor L and rectification part 4 are connected in ac power supply circuit.
4 output terminal of rectification part connects dc bus, and filter circuit 7 is connected by dc bus with rectification part 4；Filter circuit
7 are used to carry out smothing filtering to the direct current of rectification module output to export DC bus-bar voltage, in figure filter circuit 7 mainly by
Electrolytic capacitor EC is formed.
Current detecting part 3 is connected on dc bus, for detecting DC bus current value Idc, current detecting part 3 here
Can the current sampling circuit based on series resistance type, then the difference channel by being connected with resistance both ends output, such sampling
Circuit belongs to the prior art, and details are not described herein.
Alternating voltage sampling unit 2 and DC voltage sampling unit 6 are respectively used to Sample AC input voltage value Uac and direct current is female
Line voltage value Udc, DC voltage sampling unit 6 can be based on being gone here and there in figure by the first divider resistance R4 and the second divider resistance R5 here
Join the simple pressure sampling circuit formed, the circuit of alternating voltage sampling unit 2 can be identical with DC voltage sampling unit 6, also may be used
With the voltage sampling circuit based on other existing voltage sampling circuits such as transformer device structure type.
Calculation control unit 5 includes PFC calculation control units 51, and PFC calculation control units 51 are used to obtain the direct current of motor operation
Busbar voltage set-point Udref, and according to AC-input voltage value Uac, d-c bus voltage value Udc, DC bus current value
The switching tube work of Idc and DC bus-bar voltage set-point Udref generation PFC duty cycle of switching signal driving rectification parts 4, with
Active PFC is carried out to the alternating current of input.
Specifically, rectification part 4 includes the first rectification unit 41 and second switch unit 42, the first rectification unit 41 includes string
The the first diode D1 and the second diode D3 of connection, second switch unit 42 include carrying for series connection and the first of fly-wheel diode open
Pipe S7 and second switch pipe S8 is closed, the first rectification unit 41 and second switch unit 42 are in parallel, and first switch pipe S7 and second is opened
Close the common contact and first of the control terminal difference concatenation operation control unit 5 of pipe S8, the first diode D1 and the second diode D3
The common contact of switching tube S7 and second switch pipe S8 connect the L lines of AC power and N lines respectively, and being formed AC power with this returns
Road.
In figure the first diode D1 and the second diode D3 can be common low speed rectifier diode, first switch pipe S7 and
Second switch pipe S8 is metal-oxide-semiconductor (Metal Oxid Semiconductor, metal-oxide semiconductor (MOS)), naturally it is also possible to be it
The power tube of his type such as IGBT manages (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor),
First diode D1 and the second diode D3 series connection is the cathode of the second diode D3 of anode connection of the first diode D1, and the
Firewire, that is, L lines of points of common connection and AC power after one diode D1 and the second diode D3 series connection connect, the one or two pole
S poles, that is, source electrode of the cathode connection first switch pipe S7 of pipe D1, the D poles of the anode connection second switch pipe S8 of the second diode D3
It drains, first switch pipe S7 is that the D poles of first switch pipe S7 are connected the S of second switch pipe S8 with second switch pipe S8 series connection
Pole, and first switch pipe S7 is connected with the points of common connection that second switch pipe S8 connects with AC power N lines, sustained diode 5
Anode and cathode connect the D poles of first switch pipe S7 and S poles respectively, sustained diode 6 is integrated in first switch pipe S7
Portion, the anode and cathode of sustained diode 6 connect the D poles of second switch pipe S8 and S poles respectively, and sustained diode 6 is integrated in
Inside second switch pipe S8.
Above-mentioned current detecting part 3 is connected on the anode line side of dc bus in Fig. 1, can also be connected on dc bus
Cathode line side, as shown in Fig. 2, its to detect the function of DC bus current value Idc identical with Fig. 1.Current detecting part 3 specifically may be used
It is connected between rectification part 4 and the filter circuit 7.
Pfc circuit operation principle shown in the present embodiment is as follows：It is made of entirely reactor L, rectification part 4 and electrolytic capacitor EC
Ripple current rectifying and wave filtering circuit, as shown in figure 3, when PFC calculation control units 51 control first switch pipe S7 conductings, second switch pipe S8
During cut-off, at this time AC power electric current from firewire, that is, L lines through the first diode D1, the S poles of first switch pipe S7 and D poles,
Reactor L returns to AC power zero curve i.e. N lines and forms circuit, realizes the energy storage to reactor L；When PFC calculation control units 51 are controlled
During first switch pipe S7 cut-offs processed, as shown in figure 4, generating induced electromotive force on reactor L, the electric current that electromotive force generates flows through
The current direction of reactor L is consistent before ending with first switch pipe S7, the electricity that the induced electromotive force of reactor L generates at this time
The first diode D1, current detecting part 3, electrolytic capacitor EC, the sustained diode 6 of second switch pipe S8, reactor L is flowed through to return
Circuit is formed to charge to electrolytic capacitor EC to AC power zero curve, that is, N lines, and AC power electric current is realized from L lines with this
Phasing, that is, Active PFC of alternating voltage and alternating current that slave rectification part 4 during starting direction inputs.
And when PFC calculation control units 51 control first switch pipe S7 cut-offs, second switch pipe S8 conductings, such as Fig. 5 institutes
Show, at this time AC power electric current from zero curve, that is, N lines through reactor L, the S poles of second switch pipe S8 and D poles, the second diode
D3 returns to AC power firewire i.e. L lines and forms circuit, realizes the energy storage to reactor L；When PFC calculation control units 51 control second
When switching tube S8 ends, as shown in fig. 6, generating induced electromotive force on reactor L, the electric current that electromotive force generates flows through reactor
The current direction of L and second switch pipe S8 are consistent before ending, and the electric current that the induced electromotive force of reactor L generates at this time is through the
The sustained diode 5 of one switching tube S7, current detecting part 3, electrolytic capacitor EC, the second diode D3 return to AC power firewire
I.e. L lines form circuit to charge to electrolytic capacitor EC, with this realize AC power electric current from N line starting directions when from
Phasing, that is, Active PFC of alternating voltage and alternating current that rectification part 4 inputs.
Therefore, PFC calculation control units 51 are respectively by controlling the alternate conduction of first switch pipe S7 and second switch pipe S8
And cut-off, realize the Active PFC function under full-wave rectification pattern.
Further, the electric machine control system cited in the pfc circuit of the embodiment of the present invention further includes phase current sampling portion
9, phase current sampling portion 9 is used to detect the phase current signal of motor 10, and obtains corresponding phase current values, is input to motor computing
Control unit 5, such as phase current signal Iu, Iv, Iw in Fig. 1, the current sample that current sample portion 9 can be based on three resistance and single electron
Scheme is realized, belongs to the prior art, details are not described herein.
8 input terminal of inverter connects dc bus, is the DC power supply described in inverter 8 provides work as rectification busbar,
8 output terminal of inverter connects motor 10, and calculation control unit 5 further includes motor calculation control unit 52, and motor calculation control unit 52 is used
It is counted in the rotating speed of target value ω ref of phase current signal Iu, Iv, Iw according to d-c bus voltage value Udc, motor and motor 10
Generation pulse width signal is calculated, calculation control unit 5 also generates triangle carrier signal, and according to triangle carrier signal and pulse width
Signal generation pwm control signal is run to inverter 8 with driving motor 10.
Specifically, motor calculation control unit 52 passes through simultaneously according to phase current signal Iu, Iv, Iw of the motor 10 of sampling
The rotating speed of target value ω ref of d-c bus voltage value Udc and motor 10 are further obtained, by calculating, finally export six tunnels
Pwm control signal is to inverter 8, and pwm control signal is macroscopically being based on sine wave modulation principle, as shown in fig. 7, passing through
Lumbar triangle carrier wave S2 is modulated the pwm control signal waveform such as S1 finally obtained wherein all the way using sine voltage signal S3
Shown, the cycle T of PWM is traditionally arranged to be 100us-250us, finally by 8 driving motor 10 of inverter, due to machine winding
Inductance characteristic, finally on three windings of motor 10 formed sinusoidal waveform as shown in the dotted portion waveform S4 in Fig. 7.
Since the frequency of PWM is very high, carries out pulsewidth calculating in motor calculation control unit 52 and ultimately produce pwm control signal
When, the Principle of Space Voltage Vector PWM (SVPWM) realization is actually based on, i.e., is believed by calculating the pulse width of generation
Number, and pass through the timer inside motor calculation control unit 52 and generate continuous triangle carrier signal, and by above-mentioned pulse width
Mode final output pwm control signal of the signal compared with triangle carrier signal, pwm control signal share six tunnels, point
Not Kong Zhi inverter 8 the work of six switching tubes of S1-S6, last inverter 8 exports three-phase driving signal to the realization pair of motor 10
The driving operation of motor 10.
As shown in figure 8, the triangle carrier signal waveform diagram that the timer inside motor calculation control unit 52 generates is such as
Shown in S6, as shown in Du1, Du2, Du3 in figure, actual Software Create pwm control signal waveform is pulse width signal
This pulse width signal is sent into comparand register, being based on triangular carrier S6 finally by timer can generate wherein all the way
Pwm control signal is as shown in S5, and wherein each the triangular carrier cycle corresponds to one of pwm control signal cycle.Wherein S6
For triangle carrier signal in each triangle be isosceles triangle, the wave crest of each of which isosceles triangle in this isosceles three
The intermediate time of the effective pulse width of pwm control signal in angular carrier cycle is identical, such as first isoceles triangle in figure
The wave crest of shape corresponds to the midpoint b moment position at the a-c moment in effective pulse width, that is, figure of first pwm pulse waveform.It is logical
It crosses different pulse width signals and ultimately generates the different pwm control signal of different effective pulse widths.This PWM of wherein six roads
Control signal be added to six switching tubes of inverter 8 and finally constituted when controlling motor 10 three 120 ° of space phase mutual deviations to
Amount, finally synthesizes the voltage vector signal changed over time, and this voltage vector signal amplitude is constant, identical according to sine wave
Frequency rotates so that motor 10 realizes operating under the control of this voltage vector signal.
The pfc circuit applied to electric machine control system of the embodiment of the present invention, by including reactor L, rectification part 4, electric current
Test section 3, filter circuit 7, alternating voltage sampling unit 2, DC voltage sampling unit 6 and calculation control unit 5 form, and rectification part 4
It is formed in parallel by including the rectification unit of two rectifier diodes series connection and the switch unit of two switching tubes series connection, is formed with this
Full-wave rectifying circuit, calculation control unit include PFC calculation control units 51, are given by the DC bus-bar voltage for obtaining motor operation
Value Udref, and it is female according to AC-input voltage value Uac, d-c bus voltage value Udc, DC bus current value Idc and direct current
The switching tube work of line voltage set-point Udref generation PFC duty cycle of switching signal driving rectification parts 4, with the exchange to input
Electricity carries out Active PFC.The relatively existing pfc circuit of the pfc circuit of the embodiment of the present invention can effectively improve efficiency, subtract
Few common mode noise improves the reliability of entire electric machine control system with this.
Further, the second embodiment as pfc circuit provided by the invention, the of the pfc circuit based on the present invention
One embodiment in the present embodiment, current value I by reactor is determined by detecting DC bus current IdcL, electric current inspection
Survey portion 3 carries out current sample in the first switch pipe S7 or second switch pipe S8 intermediate times closed.
Pfc circuit operation principle explanation is understood in first embodiment, first switch pipe is controlled in PFC calculation control units 51
When S7 or second switch pipe S8 is opened, energy storage of the AC power electric current to reactor L passes through the electric current I of reactor at this timeL
It without electrolytic capacitor EC, will not charge at this time to electrolytic capacitor EC, therefore there is no electric current to flow through on dc bus, only
When PFC calculation control units 51 control first switch pipe S7 or the second switch pipe S8 to close, the induction electric that is generated on reactor L
The electric current I that gesture generatesLIt can just charge to electrolytic capacitor EC, just there is electric current on dc bus at this time, therefore in order to accurate
Detect the electric current of dc bus, it should detect in first switch pipe S7 or second switch pipe S8 down periods.
Pwm signal waveform such as S7 control first switch pipe S7 that PFC calculation control units 51 as shown in Figure 9 export or the
The on off state of two switching tube S8 switches over, with control pfc circuit carry out Active PFC when, current detecting part 3 is right
The acquisition of DC bus current is control first switch pipe S7 or second switch pipe S8 in a pwm control signal cycle
Be the T2 periods in the period figure of closing intermediate time such as figure in the t1 moment sampled, due to first switch pipe
When the on off state of S7 or second switch pipe S8 switch over, reactor L can carry out the conversion of energy storage and release, above-mentioned
Reactor L energy storage during switching tube is opened, passes through the current value I of reactorLIncrease, and in electricity of above-mentioned switching tube down periods
The induced electromotive force that anti-device L is generated releases to the electrolytic capacitor electric discharge of filtering, passes through the current value I of reactorLReduce,
It passes through the alternating current I of reactor LLThe waveform diagram of the PWM of switching tube is followed to be opened as shown in the S8 in figure in switching tube
T1 devices its electric current increase opened, and its electric current reduces during the t2 closed in switching tube, therefore select a suitable electric current
Sampled point is important, the problem of otherwise sampling error being brought big.Due in first switch pipe S7 or second switch pipe S8
During unlatching, pass through the electric current i of reactorLWithout electrolytic capacitor EC, only in first switch pipe S7 or second switch pipe S8
During closing, pass through the electric current i of reactorLJust by electrolytic capacitor, i.e., the electric current i of reactor at this timeLFor DC bus current value
Idc, it is tests determined, it is handed in the electric current that the intermediate time of above-mentioned switching tube down periods samples than accurate represent
Galvanic electricity stream each PWM cycle actual current value, such as I in figureLThe current value that _ sample obtains for actual samples, size
Close to the electric current I of reactorLIn the average value that the pwm control signal device of entire switching tube changes, in this, as passing through electricity
The current value I of anti-deviceL, therefore ensure that the accuracy of sampled current value, hereby it is ensured that FC calculation control units 51 control switching tube
Work is accurate, and the accuracy of Active PFC is improved with this.
Further, the 3rd embodiment as pfc circuit provided by the invention, the of the pfc circuit based on the present invention
One embodiment, as shown in Figure 10, the motor calculation control unit 52 of the electric machine control system of the present embodiment further include：
Location/velocity estimation module 521 is estimated to obtain the rotor angle of motor 10 for the rotor-position to motor
Spend estimated values theta est and motor speed estimate ω est；
Q axis gives current value Iqref computing modules 522, for being estimated according to motor rotating speed of target value ω ref, motor speed
Evaluation ω est calculate Q axis and give current value Iqref；
D axis gives current value Idref computing modules 523, for according to the maximum output voltage Vmax of inverter and inversion
The output voltage amplitude V1 of device calculates D axis and gives current value Idref；
Current control module 524 gives current value Idref, motor speed for giving current value Iqref, D axis according to Q axis
Degree estimate ω est, d-c bus voltage value Udc and phase current values Iu, Iv, Iw for being sampled to motor 10 are calculated
Pulse width signal, and pwm control signal is generated to inverter 8 according to above-mentioned triangle carrier signal and pulse width signal, with
The motor 10 is driven to run
Specifically, the motor 10 in the embodiment of the present invention can be the motor of position-sensor-free, location/velocity estimation module
During the 521 definite rotor angle estimated values theta est of motor 10 and motor speed estimate ω est, it can be realized by flux observation method
Above-mentioned function, specifically, first can be according to the voltage V in two-phase rest frameα、VβWith electric current Iα、IβIt is electromechanical to calculate compression
The estimate of machine useful flux on two-phase rest frame α and β direction of principal axis calculates as follows with specific reference to the following formula (1)：
Wherein,WithThe respectively estimate of motor useful flux on α and β direction of principal axis, VαAnd VβRespectively α and β
Voltage on direction of principal axis, IαAnd IβElectric current respectively on α and β direction of principal axis, R are stator resistance, LqJoin for the q axle inductances of motor
Number.
Then, the rotor angle estimated values theta est of compressor electric motor and motor actual speed are calculated according to following formula (2)
Value value ω est：
Wherein, Kp_pllAnd Ki_pllRespectively proportional integration parameter, θerrFor misalignment angle estimate, ωfFor speed low pass filtered
The bandwidth of ripple device.
Specifically, Q axis, which gives current value computing module 522, includes superpositing unit and pi regulator.Wherein, superpositing unit is used
It is calculated in the difference of motor rotating speed of target value ω ref and motor speed estimate ω est, pi regulator is used for according to above-mentioned folded
Add motor rotating speed of target value ω ref that unit exports and motor speed estimate ω est difference carry out PI adjust to export Q axis to
Constant current value Iqref.
Specifically, D axis, which gives current value computing module 523, includes weak magnetic controller and clipping unit, wherein, weak magnetic control
Device be used to the maximum output voltage Vmax of the inverter 8 and output voltage amplitude V1 of inverter 8 is calculated to obtain D axis to
Constant current value initial value Id0, clipping unit for D axis is given current value initial value Id0 carry out amplitude limiting processing with obtain D axis to
Constant current value Idref.
In an embodiment of the present invention, weak magnetic controller can calculate D axis according to the following formula (3) and give current value initial value
Id0：
Wherein, Id0Current value initial value, K are given for D axisiFor integral control coefficient, V1
For the output voltage amplitude of inverter, vdFor D shaft voltages, vqFor Q shaft voltages, VmaxFor the maximum output voltage of inverter 8, Vdc
The DC bus-bar voltage exported for rectifier 4.
In an embodiment of the present invention, clipping unit obtains D axis according to the following formula (4) and gives current value：
Wherein, Idref gives current value, I for D axisdemagFor motor demagnetization current limits value.
Specifically, the specific calculating of current control module 524 is as follows：
U, V, W three-phase electricity flow valuve Iu, Iv, Iw are obtained according to being sampled to motor 10, and passes through the static seat of three phase static-two-phase
It marks converting unit and carries out Clark conversion, based on following formula (5), obtain motor on two-phase rest frame α and β direction of principal axis
Electric current IαAnd Iβ
Iα=Iu
Further according to rotor angle estimated values thetaestPass through static-two cordic phase rotators converting unit of two-phase to carry out
Park is converted, and actual current value Iq, Id of D axis and Q axis under two-phase rotating coordinate system is calculated by following formula (6).
Id=Iαcosθest+Iβsinθest
Iq=-Iαsinθest+Iβcosθest (6)
Q shaft currents value and D shaft current value meters in current control module 524 are realized above by formula (5) and formula (6)
Calculate calculating of the unit to actual current value Iq, Id of D axis and Q axis.
Further, current control module 524 can calculate Q axis given voltage values according to the following formula (7) and D axis gives electricity
Pressure value：
Wherein, Vq is Q axis given voltage values, and Vd is D axis given voltage values, and Iqref is that Q axis gives current value, Idref is
D axis gives current value, and Iq is Q shaft currents, and Id is D shaft currents, and Kpd and Kid are respectively the control proportional gain of D shaft currents and integration
Gain, Kpq and Kiq are respectively the control proportional gain of Q shaft currents and storage gain, and ω is motor speed, and Ke is the anti-electricity of motor 10
Gesture coefficient, Ld and Lq are respectively D axis and Q axle inductances, the two parameters can be provided by motor manufacturer, specifically can be according to motor
The motor D axis and Q axis that manufacturer provides with taking rated value therein in the change curve of electric current,Table
Show the integrations of x (τ) in time.
Further, in order to further accurately obtain D axle inductance Ld and Q axle inductance Lq, current control module 524 is also
For：The phase current values of motor operation are obtained, and transfer the first phase current values to prestore and the second phase current values are corresponding
First Q axle inductances, the 2nd Q axle inductances value and the first D axle inductances, the 2nd D axle inductance values, according to phase current values and the first phase
Current value and the second phase current values, the first Q axle inductances, the 2nd Q axle inductances value and the first D axle inductances, the 2nd D axle inductance value meters
Calculate Q axle inductances and D axle inductance values.Specifically, phase current signal Iu, Iv of the motor 10 gathered by obtaining current sample portion 9,
Iw, wherein these three phase current sizes are identical, only need to use one of them.The motor D axis electricity that motor manufacturer provides
Sense and Q axle inductances are as shown in figure 11 with the change curve of electric current, and wherein i is winding current, that is, phase current values of motor, at this time
Can be prestored by above-mentioned graph the first phase current values i1 and corresponding first Q axle inductance values Lq1 of the second phase current values i2,
2nd Q axle inductance value Lq2 and the first D axle inductance values Ld1, the 2nd D axle inductance value Ld2, and i pairs of currently detected phase current
The D axle inductance value Ld and Q axle inductance values Lq answered can be calculated according to following mathematic interpolation formula：
Ld=Ld1+ (Ld2-Ld1) * (i-i1)/(i2-i1)
Lq=Lq1+ (Lq2-Lq1) * (i-i1)/(i2-i1)
Pass through corresponding D axle inductances Ld and Q the axis electricity of the phase current of the relatively accurate really settled front motor 10 of above-mentioned formula energy
Feel Lq values.
It, can be according to angle of rotor of motor estimate after Q axis given voltage value Vq and D axis given voltage values Vd is got
θest- two-phase static coordinate converting unit progress Park inverse transformations are rotated by two-phase to Vq and Vd, are fixed on coordinate system
Voltage value V α and V β, specific transformation for mula (8) are as follows：
Wherein, θ is 10 rotor angle of motor, can use above-mentioned rotor angle estimated values theta est herein.
Further, can according to voltage value V α and the V β that fixed coordinates are fastened by two-phase it is static-three phase static coordinate turns
It changes unit and carries out Clark inverse transformations, obtain three-phase voltage Vu, Vv and Vw, specific transformation for mula (9) is as follows：
Vu=Vα
Then duty cycle computing unit can carry out duty cycle according to DC bus-bar voltage Udc and three-phase voltage Vu, Vv and Vw
It calculates, obtains duty cycle control signal, i.e. three-phase duty cycle Du, Dv and Dw, specific formula for calculation (10) is as follows：
Du=(Vu+0.5Vdc)/Vdc
Dv=(Vv+0.5Vdc)/Vdc
Dw=(Vw+0.5Vdc)/Vdc (10)
Wherein, Udc is DC bus-bar voltage.
Here three-phase duty cycle signals contain three road pulse width signals, such as a wherein phase duty cycle Du in Fig. 8
In corresponding Du1, Du2, Du3 duty cycle signals at different moments, finally generated again by the timer inside calculation control unit
Triangle carrier signal generates corresponding three road pwm control signal to the upper bridge arm three-way switch pipe of inverter 8, and the three of lower bridge arm
Three road pwm control signals of road control signal and corresponding complementary therewith, therefore three-phase duty cycle signals here are actual contains
Six road pwm control signals, finally according to the corresponding six roads pwm control signal of three-phase duty cycle Du, Dv, Dw to the six of inverter 4
Way switch pipe is controlled, to realize that the driving to motor 10 is run.
Further, the fourth embodiment as pfc circuit provided by the invention, the of the pfc circuit based on the present invention
Three embodiments, as shown in figure 12, in the present embodiment, PFC calculation control units 51 include weak magnetic critical voltage Us computing modules
511st, AC voltage parameter determining module 512, weak magnetic critical voltage value Us clipping modules 513, inductor current value ILComputing module
516th, PFC switching signals duty cycle computing module 515 and switching signal generation module 517；
Weak magnetic critical voltage value Us computing modules 511, for Q axis given voltage value Vq, D axis given voltage value Vd and tune
Weak magnetic critical voltage value Us during motor operation is calculated in COEFFICIENT K max processed.
AC voltage parameter determining module 512, for the AC-input voltage value gathered according to alternating voltage sampling unit 2
Uac carries out calculating and respectively obtains AC-input voltage polarity mark signal, AC-input voltage virtual value Urms, exchange input
Absolute value of voltage | Uac | and zero passage detection signal, since AC-input voltage value Uac is the voltage value that sine wave changes,
It is not difficult to obtain above-mentioned parameter value by analyzing and calculating its real-time voltage value in a sine wave period.
Weak magnetic critical voltage value Us clipping modules 513 obtain direct current mother for carrying out amplitude limit to weak magnetic critical voltage value Us
Line voltage set-point Udref.
Inductive current set-point ILrefComputing module 514, for female according to DC bus-bar voltage set-point Udref and direct current
Line voltage value Udc carries out that inductive current set-point I is calculatedLref；
Inductor current value ILComputing module 516, for inductor current value I to be calculated according to DC bus current value IdcL；
PFC switching signal duty cycles computing module 515, for according to inductive current set-point ILrefWith inductor current value IL
PFC switching signal duty cycle signals are calculated；
Switching signal generation module 517, for according to PFC switching signals duty cycle signals, AC-input voltage polarity mark
Know signal and switching signal is calculated to control first switch pipe S7 or second switch pipe S8 in alternating voltage zero-crossing signal
Switch.
Specifically, weak magnetic critical voltage value Us clipping modules 513 are calculated based on following equation (11)：
Wherein Vd is D axis given voltage values, and Vq is Q axis given voltage values, the two parameters are in above-mentioned 3rd embodiment
The current control module 524 of motor calculation control unit 52 be calculated based on formula (7), Kmax is the index of modulation, i.e. inversion
The ratio between device maximum output voltage and busbar voltage.If considering the situation of linear modulation,
Further, weak magnetic critical voltage value Us is passed through amplitude limit [U by weak magnetic critical voltage value Us clipping modules 513dc_min,
Udc_max] after obtain the command value Udref of DC bus-bar voltage, wherein, Udc_minIt is determined according to input voltage, usually takes Udc_min
=Uac_max+U0,Uac_maxFor the maximum of alternating voltage, U0For constant, recommendation takes 5V-10V.Udc_maxIt is pressure-resistant according to system and protect
Certain surplus is stayed to determine, Udc_max=Urate-U1,UrateFor device pressure voltage, IPM modules are pressure-resistant desirable used in the present embodiment
For 500V, i.e. Urate=500V, U1To retain pressure-resistant surplus, recommend 50V-100V, U in the present embodiment1It can be taken as 100V.
Further, inductive current set-point ILrefInductive current set-point I is calculated in computing module 514LrefWhen, first
DC bus-bar voltage set-point Udref and d-c bus voltage value Udc are made the difference, and carry out PI controls, is multiplied by supply voltage
Absolute value | Uac |, multiplied by with the 1/U reciprocal of supply voltage virtual value square2Rms obtains the command value I of inductive currentLref。
Further, inductor current value ILInductor current value I is calculated in computing module 516LWhen, pass through dc bus electricity
Inductor current value I is calculated in flow valuve IdcL, understand that DC bus current value Idc is first switch pipe in second embodiment
The inductor current value I that S7 or second switch pipe S8 down periods pass through reactor LL, therefore with DC bus current value Idc be
Inductor current value I can be representedL。
Further, when PFC switching signal duty cycle signals are calculated in PFC switching signals duty cycle computing module 515,
According to inductive current set-point ILrefWith the actual value I of inductive currentLIt makes the difference, and carries out PI controls and obtain PFC switching signal duties
Compare D.
Further, switching signal generation module 517 finally exchanges input electricity according to PFC switching signal duty cycle signals D
Polarity mark signal and alternating voltage zero-crossing signal is pressed finally to determine output to first switch pipe S7 or second switch pipe S8
The pwm control signal of switch, pfc circuit to be controlled to work.
During the switching signal that the PFC calculation control units 51 of the present embodiment generate control switching tube work in calculating, by
It is run in introducing motor calculation control unit 51 in the pwm control signal for calculating generation control inverter with finally obtaining motor 10
Relevant parameter such as Q axis given voltage value Vq and D axis given voltage value Vd with obtain weak magnetic control parameter value, therefore its transport
Control process introduces the real-time parameter during motor 10 controls so that the control of pfc circuit can monitor motor 10 in real time
Loading condition and change, therefore control it is more accurate.
The present invention also provides a kind of electric machine control system, electric machine control system can be used for driving permanent magnet synchronous motor fortune
Row can be applicable on the home appliance of the sampling permanent magnet synchronous motor work such as air conditioner or washing machine, motor control of the invention
System processed includes the pfc circuit of the embodiments of the present invention, can effectively improve the reliability of entire electric machine control system.
The present invention also provides a kind of transducer air conditioning, transducer air conditioning includes indoor unit part and outdoor machine part, wherein
Outdoor controller and/or indoor machine controller may include the electric machine control system described in the embodiment of the present invention, with control room
Inner blower either outdoor fan or outdoor compressor operation can effectively promote the reliability of entire transducer air conditioning.
In the description of this specification, the description meaning of reference term " first embodiment ", " second embodiment ", " example " etc.
Refer to reference to specific method, device or the feature that the embodiment or example describe be contained at least one embodiment of the present invention or
In example.In the present specification, a schematic expression of the above terms does not necessarily refer to the same embodiment or example.And
And specific features, method, apparatus or the feature of description can be in any one or more of the embodiments or examples with suitable sides
Formula combines.In addition, without conflicting with each other, those skilled in the art can be real by the difference described in this specification
It applies example or example and different embodiments or exemplary feature is combined and combines.
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
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (11)
1. a kind of pfc circuit, the pfc circuit is applied to electric machine control system, which is characterized in that the pfc circuit includes electricity
Anti- device, rectification part, current detecting part, filter circuit, alternating voltage sampling unit, DC voltage sampling unit and calculation control unit；Institute
The input terminal of reactor connection AC power is stated, the reactor and rectification part are connected in ac power supply circuit；The rectification
Portion's output terminal connection dc bus, the filter circuit are connected by the dc bus with the rectification part；The electric current inspection
Survey portion is connected on the dc bus；
The rectification part includes the first diode, the second diode and carries the first switch pipe of fly-wheel diode and second and open
Guan Guan, the L lines of points of common connection and AC power after first diode and the second Diode series connect；Described first
The N lines of points of common connection and AC power after switching tube and the series connection of second switch pipe connect；The first switch pipe and second
One end after switching tube series connection connects first diode cathode, another after the first switch pipe and the series connection of second switch pipe
The control terminal of one end connection second diode anode, the first switch pipe and second switch pipe connects the computing respectively
Control unit；Wherein
The current detecting part obtains corresponding DC bus current value for detecting the DC bus current；The filter
Wave circuit is used to carry out smothing filtering to the direct current of rectification module output to export DC bus-bar voltage；The alternating current
Pressure sampling unit obtains corresponding AC-input voltage value for detecting AC-input voltage；The DC voltage sampling unit is used
In the detection DC bus-bar voltage, and obtain corresponding d-c bus voltage value；
The calculation control unit includes PFC calculation control units, and the direct current that the PFC calculation control units are used to obtain motor operation is female
Line voltage set-point, and according to the AC-input voltage value, the d-c bus voltage value, the DC bus current value with
And the DC bus-bar voltage set-point generation PFC duty cycle of switching signal drives the switching tube work of the rectification part, with right
The alternating current of the input carries out Active PFC.
2. pfc circuit as described in claim 1, which is characterized in that the current detecting part is connected on the rectification part and institute
Between stating filter circuit, current value by the reactor is determined by detecting the DC bus current.
3. pfc circuit as claimed in claim 2, which is characterized in that the current detecting part in the first switch pipe or
The intermediate time that the second switch pipe is closed carries out current sample.
4. pfc circuit as described in claim 1, which is characterized in that the electric machine control system include phase current sampling portion and
Inverter；
The phase current sampling portion is used to sample the phase current signal of the motor and is input to the motor calculation control unit；
The inverter input terminal connects the dc bus, and the inverter output end connects motor；
The calculation control unit further includes motor calculation control unit, and the motor calculation control unit is used for according to the dc bus
The rotating speed of target value of voltage value, the phase current signal of the motor and the motor calculates generation pulse width signal, described
Calculation control unit also generates triangle carrier signal, and generates PWM according to the triangle carrier signal and the pulse width signal
Control signal is to the inverter, to drive the motor operation.
5. pfc circuit as claimed in claim 4, which is characterized in that the motor calculation control unit includes：
Location/velocity estimation module is estimated to obtain the rotor angle estimate of motor for the rotor-position to motor
With motor speed estimate；
Q axis gives current value computing module, and electricity is given for calculating Q axis according to motor rotating speed of target value, motor speed estimate
Flow valuve；
D axis gives current value computing module, for the maximum output voltage and the output voltage amplitude of inverter according to inverter
It calculates D axis and gives current value；
Current control module, for giving current value according to the Q axis, the D axis gives current value, motor speed estimation
It value, the d-c bus voltage value and the phase current values of motor sampling calculate generates the pulse width signal, and
The pwm control signal is generated to the inverter according to the triangle carrier signal and the pulse width signal, with driving
The motor operation.
6. pfc circuit as claimed in claim 5, which is characterized in that the D axis, which gives current value computing module, to be included：
Weak magnetic controller, carry out by the output voltage amplitude of the maximum output voltage to the inverter and the inverter based on
It calculates and gives current value initial value to obtain D axis；
Clipping unit carries out amplitude limiting processing to obtain the D axis to constant current for giving current value initial value to the D axis
Value.
7. pfc circuit as claimed in claim 5, which is characterized in that the current control module further includes：
Q shaft currents value and D shaft current value computing units, for being calculated according to the phase current values and the angle estimation value
Obtain the Q shaft currents value and the D shaft currents value.
8. pfc circuit as claimed in claim 5, which is characterized in that the current control module is additionally operable to：
The phase current values of motor operation are obtained, and transfer the first phase current values to prestore and the second phase current values correspond to respectively
The first Q axle inductances, the 2nd Q axle inductances value and the first D axle inductances, the 2nd D axle inductance values, according to the phase current values and
First phase current values and second phase current values, the first Q axle inductances, the 2nd Q axle inductances value and described
First D axle inductances, the 2nd D axle inductances value calculate Q axle inductances and D axle inductance values.
9. such as claim 5 to 8 any one of them pfc circuit, which is characterized in that the PFC calculation control units include weak magnetic
Critical voltage computing module, AC voltage parameter determining module, weak magnetic critical voltage value clipping module, inductor current value calculate mould
Block, PFC switching signal duty cycle computing modules and switching signal generation module；Wherein
The weak magnetic critical voltage value computing module, for according to the Q axis given voltage value, the D axis given voltage value with
And the weak magnetic critical voltage values of index of modulation Kmax when being calculated motor operation；
The AC voltage parameter determining module for the AC-input voltage value gathered according to alternating voltage sampling unit, carries out
Calculating respectively obtain AC-input voltage polarity mark signal, AC-input voltage virtual value, AC-input voltage absolute value and
Zero passage detection signal；
The weak magnetic critical voltage value clipping module obtains the direct current mother for carrying out amplitude limit to the weak magnetic critical voltage value
Line voltage set-point；
The inductive current set-point computing module, for according to the DC bus-bar voltage set-point and dc bus electricity
Pressure value carries out that the inductive current set-point is calculated；
The inductor current value computing module, for the inductor current value to be calculated according to the DC bus current value；
The PFC switching signals duty cycle computing module, for according to the inductive current set-point and the inductor current value
The PFC switching signals duty cycle signals are calculated；
The switching signal generation module, for according to the PFC switching signals duty cycle signals, AC-input voltage polarity mark
Show signal and switching signal is calculated to control the first switch pipe or described second open in alternating voltage zero-crossing signal
Close pipe switch.
10. a kind of electric machine control system, which is characterized in that including pfc circuit as described in any one of claim 1 to 9.
11. a kind of transducer air conditioning, which is characterized in that including electric machine control system as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093556.8A CN108123593B (en) | 2018-01-29 | 2018-01-29 | PFC circuit, motor control system and variable frequency air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093556.8A CN108123593B (en) | 2018-01-29 | 2018-01-29 | PFC circuit, motor control system and variable frequency air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108123593A true CN108123593A (en) | 2018-06-05 |
| CN108123593B CN108123593B (en) | 2023-11-28 |
Family
ID=62233278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810093556.8A Active CN108123593B (en) | 2018-01-29 | 2018-01-29 | PFC circuit, motor control system and variable frequency air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108123593B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030442A (en) * | 2020-01-27 | 2020-04-17 | 广东希塔变频技术有限公司 | Control method, control device, PFC circuit, motor driving device and air conditioner |
| TWI705647B (en) * | 2018-06-11 | 2020-09-21 | 日商三菱電機股份有限公司 | Convertor and motor control device |
| CN114337418A (en) * | 2021-12-30 | 2022-04-12 | 海信（山东）空调有限公司 | PFC circuit control method, air conditioner and computer storage medium |
| CN114623567A (en) * | 2022-03-15 | 2022-06-14 | 青岛海信日立空调系统有限公司 | Air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011103718A (en) * | 2009-11-10 | 2011-05-26 | Mitsubishi Electric Corp | Brushless dc motor drive circuit, brushless dc motor, and apparatus |
| CN104953854A (en) * | 2015-06-19 | 2015-09-30 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner, power circuit of outdoor unit of variable-frequency air conditioner and PFC (power factor correction) control method |
| WO2016050043A1 (en) * | 2014-09-30 | 2016-04-07 | 海信科龙电器股份有限公司 | Alternating-alternating variable-frequency air conditioner control method and controller |
| CN106505527A (en) * | 2016-12-19 | 2017-03-15 | 广东美的制冷设备有限公司 | Motor drive protection device, over-voltage protection method and transducer air conditioning |
| CN106559026A (en) * | 2016-11-30 | 2017-04-05 | 广东美的制冷设备有限公司 | A kind of control method of motor driven systems, control device and transducer air conditioning |
| CN207884487U (en) * | 2018-01-29 | 2018-09-18 | 广东美的制冷设备有限公司 | Pfc circuit, electric machine control system and transducer air conditioning |
-
2018
- 2018-01-29 CN CN201810093556.8A patent/CN108123593B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011103718A (en) * | 2009-11-10 | 2011-05-26 | Mitsubishi Electric Corp | Brushless dc motor drive circuit, brushless dc motor, and apparatus |
| WO2016050043A1 (en) * | 2014-09-30 | 2016-04-07 | 海信科龙电器股份有限公司 | Alternating-alternating variable-frequency air conditioner control method and controller |
| CN104953854A (en) * | 2015-06-19 | 2015-09-30 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner, power circuit of outdoor unit of variable-frequency air conditioner and PFC (power factor correction) control method |
| CN106559026A (en) * | 2016-11-30 | 2017-04-05 | 广东美的制冷设备有限公司 | A kind of control method of motor driven systems, control device and transducer air conditioning |
| CN106505527A (en) * | 2016-12-19 | 2017-03-15 | 广东美的制冷设备有限公司 | Motor drive protection device, over-voltage protection method and transducer air conditioning |
| CN207884487U (en) * | 2018-01-29 | 2018-09-18 | 广东美的制冷设备有限公司 | Pfc circuit, electric machine control system and transducer air conditioning |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI705647B (en) * | 2018-06-11 | 2020-09-21 | 日商三菱電機股份有限公司 | Convertor and motor control device |
| CN111030442A (en) * | 2020-01-27 | 2020-04-17 | 广东希塔变频技术有限公司 | Control method, control device, PFC circuit, motor driving device and air conditioner |
| CN111030442B (en) * | 2020-01-27 | 2023-02-28 | 广东希塔变频技术有限公司 | Control method, control device, PFC circuit, motor driving device and air conditioner |
| CN114337418A (en) * | 2021-12-30 | 2022-04-12 | 海信（山东）空调有限公司 | PFC circuit control method, air conditioner and computer storage medium |
| CN114337418B (en) * | 2021-12-30 | 2023-10-27 | 海信空调有限公司 | PFC circuit control method, air conditioner and computer storage medium |
| CN114623567A (en) * | 2022-03-15 | 2022-06-14 | 青岛海信日立空调系统有限公司 | Air conditioner |
| CN114623567B (en) * | 2022-03-15 | 2023-10-17 | 青岛海信日立空调系统有限公司 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108123593B (en) | 2023-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108054913A (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN108023473B (en) | PFC circuit, motor control system and variable frequency air conditioner | |
| CN108199576B (en) | PFC circuit, motor control system and variable frequency air conditioner | |
| CN107681929B (en) | Motor control system and variable frequency air conditioner | |
| JP4429338B2 (en) | Motor control device, current detection unit | |
| CN108123593A (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN110297182B (en) | Power electronic load system for simulating open-winding permanent magnet synchronous motor | |
| CN101025156B (en) | DC frequency-changeable compressor driving apparatus and method | |
| CN110224648A (en) | Permanent magnet synchronous motor parameter identification and method for controlling position-less sensor and system | |
| CN105119536B (en) | A kind of motor driver topology and its control method | |
| CN110112964A (en) | A kind of brushless DC motor without position sensor commutation position correction system and method | |
| CN109525152A (en) | Motor drive control method, device and circuit | |
| CN207427006U (en) | Electric machine control system, transducer air conditioning | |
| CN111030442B (en) | Control method, control device, PFC circuit, motor driving device and air conditioner | |
| CN111130333B (en) | Control method, control device, PFC circuit, motor driving device and air conditioner | |
| CN109713949A (en) | A kind of suppressing method and system of torque pulsation of brushless DC motor | |
| CN108054914A (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN108023474B (en) | PFC circuit, motor control system and variable frequency air conditioner | |
| CN209488475U (en) | Motor control assembly and electrical equipment based on FOC | |
| CN207884488U (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN207884487U (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN207884485U (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN208063042U (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN207884486U (en) | Pfc circuit, electric machine control system and transducer air conditioning | |
| CN208112505U (en) | Pfc circuit, electric machine control system and transducer air conditioning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |