CN109980914A - Circuit of power factor correction and air conditioner - Google Patents
Circuit of power factor correction and air conditioner Download PDFInfo
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- CN109980914A CN109980914A CN201910415197.8A CN201910415197A CN109980914A CN 109980914 A CN109980914 A CN 109980914A CN 201910415197 A CN201910415197 A CN 201910415197A CN 109980914 A CN109980914 A CN 109980914A
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- 238000012937 correction Methods 0.000 title claims abstract description 93
- 238000001514 detection method Methods 0.000 claims description 57
- 239000003990 capacitor Substances 0.000 claims description 25
- 230000001681 protective effect Effects 0.000 claims description 24
- 230000001360 synchronised effect Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 20
- 239000004065 semiconductor Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000005856 abnormality Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000015607 signal release Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Rectifiers (AREA)
Abstract
The present invention provides a kind of circuit of power factor correction and air conditioners, wherein circuit of power factor correction includes: power factor correction module, receives the power supply signal of AC power source, and power factor correction module includes switching tube；First reactor and the second reactor, the first reactor is set to the firewire of AC power source, the second reactor is set on the zero curve of AC power source；Drive module is connected to the driving input terminal of switching tube, is used for switching tube output switching signal；Control module is connected to drive module, opens output switching signal for control switch drive module or closes output switching signal.According to the technical solution of the present invention, by on alternating current firewire with the first reactor and the second reactor, relative to single reactor circuit, on the one hand, it can show the effect of two reactors superposition, on the other hand, the large scale reactor of assembly difficulty can be replaced, it is mounted in circuit of power factor correction, to reduce installation difficulty.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of circuit of power factor correction and a kind of air conditioner.
Background technique
Circuit of power factor correction (power factor correction, i.e. pfc circuit) is switched using high-power MOS
Technology substitutes IGBT device as main power device, replaces IGBT conduction voltage drop constant using the characteristic of the low conduction impedance of MOS
Characteristic realizes the lower power consumption under middle low power, to realize the power consumption for reducing air conditioner.
In the related technology, as shown in Figure 1, carrying out power factor correction module using the driving chip with defencive function
Driving is realized the power factor emendation function of circuit in conjunction with single reactor, is had the following deficiencies:
(1) in the pfc circuit structure for air conditioner, often volume is all larger with the matched reactor of AC power source,
Cause installation difficulty higher；
(2) driving chip with defencive function can only realize abnormality detection when electric current flows through upper and lower bridge arm, actual
Current direction seldom walks upper and lower bridge arm runner, therefore the probability that the corresponding failure of protection scheme occurs is very low, and practicability is poor.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an object of the present invention to provide a kind of circuit of power factor correction.
It is another object of the present invention to provide a kind of air conditioners.
To achieve the goals above, according to the embodiment of the first aspect of the invention, a kind of PFC is provided
Circuit, comprising: power factor correction module receives the power supply signal of AC power source, and the power factor correction module includes opening
Guan Guan, the switching tube are configured as controlling the power supply signal to load supplying；First reactor and the second reactor, it is described
First reactor is set to the firewire of the AC power source, second reactor is set on the zero curve of the AC power source；
Drive module is connected to the driving input terminal of the switching tube, is used for the switching tube output switching signal；Control module,
It is connected to the drive module, is opened described in the output switching signal or closing output for controlling the switch drive module
Switching signal, wherein if executing Active PFC operation, the drive module output is controlled by the control module and is corresponded to
Switch control signal, the drive module is controlled by the switch control signal and exports the switching signal, to described the
One reactor and second reactor charge, or are discharged by first reactor and second reactor.
In the technical scheme, by alternating current firewire with the first reactor and the second reactor, relative to single reactance
Device circuit, on the one hand, can show the effect of two reactors superposition, on the other hand, the large scale of assembly difficulty can be replaced
Reactor is mounted in circuit of power factor correction, to reduce installation difficulty.
In addition, it is corresponding to control drive module output by control module in executing PFC operating process
Switch control signal, so as to charging path or discharge path are correspondingly formed in power factor correction module, to realize full-wave rectification
Power factor emendation function under mode.
In the above-mentioned technical solutions, optionally, further includes: Hall current sensor is set to the PFC
The input current to acquire input current, and is converted to voltage signal by the exchange input side of module；Protective module is driven,
It is connect with the Hall current sensor and the control module, for according to the voltage signal and corresponding secure threshold
Between relationship, it is determined whether Xiang Suoshu control module output protection signal, the protection signal is for triggering the control mould
Block closes the output of the drive module.
Wherein, secure threshold indicates the safe voltage upper limit value of the input side of power factor correction module.
In the technical scheme, Hall current sensor, Hall are set in the ac input end of power factor correction module
Position of the current sensor based on setting, acquires the input current of power factor correction module, and converts electrical current into voltage letter
In number output driving protective module, to detect whether occurring over-current phenomenon avoidance by driving protective module, to detect occurring overcurrent
In the case where phenomenon, control stops to power factor correction module output switching signal, on the one hand, due to Hall current sensor
It is not in electrical contact with circuit-under-test, the power of tested power supply can not be consumed, therefore do not influence the efficient low function of frequency conversion equipment
On the other hand consumption control since Hall current sensor directly acquires the input terminal electric current of power factor correction module, makes power
Factor correcting module corresponding different current flow paths when executing different feature operations, such as diagonal bridge arm flow path, top
Left and right bridge arm flow path and the left and right bridge arm flow path of lower part etc. can carry out circuit abnormality inspection by Hall current sensor
It surveys, therefore can more directly detect whether rectifier exception occurs, and when determining that appearance is abnormal, in different works
It can determine corresponding exceptional part under condition, it is middle compared with the existing technology that sampling is combined using the driving chip with defencive function
Resistance carries out the scheme of over-current detection, and limitation is smaller, and more has specific aim and practicability.
Wherein, Hall current sensor is that high current is transformed to secondary small voltage signal using Hall effect
Small voltage signal is enlarged into normal voltage, that is to say, that Hall current sensor pair by sensor, and associative operation amplifier
Outer output voltage signal, and be compared with the secure threshold built in driving protective module, circuit is determined according to the result of the comparison
In whether there is short circuit overcurrent phenomenon, since Hall current sensor can both measure exchange, direct current can also be measured, therefore both
The exchange input side in power factor correction module can be set, the direct current output in power factor correction module also can be set
Side, in this application, due to taking into account PFC and full-wave rectification, by Hall current sensor be set to power because
The exchange input side of number correction module.
In any of the above-described technical solution, optionally, further includes: zero crossing detection module is arranged in the AC power source
Zero line and zero line side between, and be connected to the control module, the zero crossing detection module is for acquiring the zero line
Zero passage detection signal between the zero line side；The control module is also used to: according to zero crossing detection module output
The phase state of AC power source is stated described in zero passage detection signal is determining, to determine according to the phase state to the drive module
Switch control signal, charge or discharge are carried out to first reactor and second reactor with control.
In the technical scheme by the way that the first reactor and the second reactor to be arranged in the friendship of power factor correction module
It flows between input terminal and AC power source, when AC power source carries out exchange output, reactor can will be supplied from AC power source
Electric energy is converted to magnetic energy using as energy stores, and can be realized by discharging the energy pfc circuit boosting and power because
Several improvement.
Specifically, by the way that zero crossing detection module is arranged between firewire and zero curve, to judge to exchange by zero crossing detection module
The real-time phase of power supply, to be executed according to switching device different in different phase state driving power factor correcting modules
Switch operation, to realize rectification function or PFC (PFC) function respectively, to realize load end based on rectification function
Direct current supply, or controlled by PFC, make to exchange side voltage and ac-side current and reach consistent in phase.
In addition, there are many reason of generating over-current phenomenon avoidance, for example circuit is interfered and causes control module crash reset, or
Short circuit exception etc. occurs for reactor.
In any of the above-described technical solution, optionally, the Hall current sensor is set to first reactor
Between zero line and/or the Hall current sensor is set between second reactor and zero line side.
In any of the above-described technical solution, optionally, the power factor correction module is opened by first switch tube, second
Guan Guan, third switching tube construct to be formed with the 4th switching tube, and first switch tube and second switch are set to PFC
The top of module, third switching tube and the 4th switching tube are set to the lower part of power factor correction module, first switch tube and the
Three switching tubes are set to the left part of power factor correction module, and second switch and the 4th switching tube are set to PFC
The right part of module, the first switch tube, the second switch, the third switching tube and the 4th switching tube are included
Freewheeling diode by the drain electrode of the first switch tube and the drain series of the second switch, and tie point is determined as
The cathode output end of the power factor correction module, by the source electrode string of the source electrode of the third switching tube and the 4th switching tube
Join, and tie point is determined to the cathode output end of the power factor correction module, and be grounded, by the source of the first switch tube
The drain series of pole and the third switching tube, and tie point is connected to the zero line, by the source of the second switch
The drain series of pole and the 4th switching tube, and tie point is connected to the zero line side.
Specifically, first switch tube, second switch, third switching tube and the 4th switching tube all can be MOSFET
(Metal-Oxide-Semiconductor Field-Effect TransIstor, metal oxide semiconductor field effect transistor
Pipe, i.e. metal-oxide-semiconductor), such as super node MOSFET or SiC-MOSFET.
The working method of metal-oxide-semiconductor, controls on-off between source electrode and drain electrode by grid and realizes and switch, and when conducting needs grid
Power supply is greater than source electrode power supply.
In the technical scheme, by the way that the power factor correction module being made of four switching tubes is arranged, in conjunction with control mould
The control instruction of block output, control circuit executes rectifying operation or PFC operation respectively, as motor driven system
When the composition part of system, boosted by being alternately carried out " power-factor improvement movement " and " synchronous rectification movement ",
To achieve the purpose that improve the permission limit of motor speed, and during the work time, by increasing setting electric current in circuit
Mutual inductor and Hall current inductor, to detect running current, and detect there is current anomaly in the case where, control function
Rate factor correcting module stops working, and reruns after Abnormality remove, to guarantee the safety of motor driven process.
In the technical scheme, Hall current sensor is arranged by the ac input end in power factor correction module,
No matter rectifying operation or PFC operation are being executed, is thering is electric current to flow through Hall current sensor, thus detecting
To when having electric current to flow through hall device, which will export corresponding voltage, be switched according to the four of power factor correction module
The current value that pipe is able to bear sets in the over-current detection unit built in driving protective module or Hall current sensor and needs
The voltage value of protection, first switch tube are connected on firewire between zero curve in second switch, and third switching tube is in the 4th switch
Pipe is connected on firewire between zero curve, when first switch tube-second switch or the appearance of the-the four switching tube of third switching tube are different
When normal overcurrent, which will export relevant voltage by Hall current sensor and trigger driving protective module, and then turn off and drive
The switching signal of dynamic model block, when overcurrent signal relief, drives protective module that will release to protect the overcurrent for realizing switch tube
Control to overcurrent drive module, to restore to work normally, thus during rectifying operation or during PFC
The timely and effectively detection to the higher failure of likelihood ratio can be achieved, to reach the mesh for the safety for promoting entire pfc circuit
's.
For the circuit of power factor correction of Hall current sensor is arranged, can be based in different current flow paths
Hall current sensor samples voltage, and determines whether there is short circuit phenomenon according to the testing result of sampled voltage, because
This can satisfy first switch tube in power factor correction module, second switch, third switching tube and the 4th switching tube not
The detection demand for the flow path that same combining form is formed.
In any of the above-described technical solution, optionally, the drive module includes for driving the first switch tube
With the first drive module of the third switching tube, and for driving the second switch and the 4th switching tube
Two drive modules, wherein if the driving protective module is detecting the voltage signal greater than secure threshold and/or the pressure
Drop is greater than the second default secure threshold, then triggers the control module and close first drive module and the second driving mould
The driving of block exports.
In the technical scheme, drive module includes the first drive module and the second drive module, to realize H bridge reorganizer
Half-bridge driven.
In addition, those skilled in the art can understand that, when control module controls drive module stopping driving output,
Stop exporting for the first drive module of control simultaneously and the second drive module, i.e. two drive modules are having the same to be executed preferentially
Grade.
Specifically, first switch tube and third switching tube are driven using the first drive module, and second switch is opened with the 4th
It closes pipe to drive using the second drive module, the voltage signal of Hall current sensor output is sent to driving protective module, works as drive
Dynamic protective module detects that the voltage signal of Hall current sensor output will be forced shutdown the first drive module beyond preset value
With the second drive module, thus protection four switching tubes.
In any of the above-described technical solution, optionally, further includes: bus capacitor, one end connection of the bus capacitor
To the cathode output end, the other end of the bus capacitor is grounded, and drive module exports the switching signal, passes through the friendship
Galvanic electricity source charges to the bus capacitor or bus capacitor electric discharge, drive module do not export the switching signal, the mother
Line capacitance electric discharge.
In any of the above-described technical solution, optionally, the control module is also used to: if the input of the AC power source
Voltage is in positive half cycle, then controls the drive module output for the first switch tube to be connected with the 4th switching tube
Switching signal, and bypass corresponding freewheeling diode；The control module is also used to: if the input voltage of the AC power source
In negative half period, then the drive module output is controlled for opening the second switch with what the third switching tube was connected
OFF signal, and corresponding freewheeling diode is bypassed, to realize synchronous rectification.
Wherein, there is freewheeling diode in the inside of first switch tube, freewheeling diode is the source electrode in first switch tube
The saturation voltage (the drain source voltage across poles under on-state) of the part of existing PN junction between drain electrode, first switch tube is low
In the positive voltage drop of freewheeling diode.Electric current is flowed through in the source drain of first switch tube as a result, and in parasitic two poles
It flows through electric current in pipe to compare, voltage drop becomes smaller, or even can reduce conduction losses.It is easy-to-understand to and says, the of on-state
Electric current is flowed through in one switching tube compared with flowing through electric current in the freewheeling diode in the first switch tube in off-state, makes to be connected
Loss becomes smaller, in addition, being also suitable for other second switches, third switching tube and the 4th switching tube.
In the technical scheme, open-minded according to the phase state of alternating current by the principle using metal-oxide-semiconductor low conduction voltage drop
Low-power consumption synchronous rectification can be realized in corresponding metal-oxide-semiconductor.
Specifically, control module carries out exporting corresponding control according to the current alternating current phases that zero crossing detection module detects
Signal processed drives corresponding switching tube to work.
In the related technology, when synchronizing rectification, in AC power source positive half cycle, electric current passes through Hall current sensor
And reactor, it is then rectified in the freewheeling diode of the 4th switching tube to system power supply by first switch tube, at this time due to continuous
It is larger to flow diode drop, causes energy waste.
In the technical scheme, control module judges to start in the positive half cycle of AC power source according to zero crossing detection module at this time
When, electric current passes through Hall current sensor and reactor, and output switching signal driving first switch tube is connected with the 4th switching tube,
The electric current for flowing through freewheeling diode on the 4th switching tube of first switch tube is set to flow through metal-oxide-semiconductor, using the low on state characteristic of metal-oxide-semiconductor,
Freewheeling diode is bypassed, to reduce conduction loss.Similarly in AC power source negative half period, control module then controls and opens second
Switching tube and third switching tube make four metal-oxide-semiconductors realize synchronous rectification, during synchronous rectification, by by suddenly
That current sensor current detecting, detects whether over-current phenomenon avoidance occur.
In any of the above-described technical solution, optionally,
The control module is also used to: if the input voltage of the AC power source is in positive half cycle, according to the zero passage
Detect that signal and the switching signal control the third switching tube and the 4th switching tube is opened and closed, the third switching tube with
The 4th switching tube conducting, to charge to the reactor, turns off the third switching tube and the 4th switching tube,
The first switch tube conducting, the reactor power to the load；The control module is also used to: if the AC power source is defeated
Enter voltage and be in negative half period, then according to the zero passage detection signal and the switching signal control the third switching tube with it is described
The opening and closing of 4th switching tube, the third switching tube is connected with the 4th switching tube, to charge to the reactor, shutdown
The third switching tube and the 4th switching tube drive the second switch to be connected, and the reactor powers to the load, with
Realize PFC.
In the technical scheme, when circuit is used to carry out PFC operation, when input is in the positive half cycle of AC power source,
Control module drives third switching tube to be connected with the 4th switching tube, charges, filling to reactor according to zero passage detection signal
In electric process, short circuit phenomenon is determined whether by the electric current on detection Hall current sensor, when shutdown third switching tube
When with four switching tubes, control module drives first switch tube to open, and the electric energy of reactor storage will be released by first switch tube
It puts to late-class circuit, to bus capacitor and load (such as motor) power supply, when input is in the negative half period of AC power source, control
Module is driven third switching tube to be connected with the 4th switching tube, charged to reactor according to zero passage detection signal, when turning off the
When three switching tubes and four switching tubes, control module drives second switch to open, and the electric energy of reactor storage will pass through second
Switching tube is released to late-class circuit, to bus capacitor and load (such as motor) power supply, by discharging to bus capacitor in reactance
The energy put aside in device boosts to the DC voltage of bus capacitor, so as to reduce current waveform by short circuit current
Distortion, make current waveform close to sine wave, and then the power factor of pfc circuit can be improved.
Further, no matter input voltage is in the positive half cycle or negative half period of AC power source, and electric current flows through Hall electricity
Flow sensor, therefore during executing PFC, current signal is acquired by Hall current sensor and is converted to
Corresponding voltage signal, to be based on whether overcurrent occur in voltage signal decision circuitry.
In any of the above-described technical solution, optionally, further includes: load drive module is set to the anode output
Between end and the cathode output end, for receiving the direct current output of the power factor correction module, to load supplying；Institute
It states control module and is additionally coupled to load drive module connection, for exporting inverter control signal to the load drive module.
In the technical scheme, in the application scenarios that load is motor, load drive module is used for constant voltage DC is inverse
Become three-phase alternating current output, powered with realizing to motor, in conjunction with the setting of DC bus-bar voltage detection module, by power because
The detection of the busbar voltage of the direct current output of number correction module and the detection of the input voltage, control PFC mould
Pulsewidth in block when switch state and each switching tube conducting of each switching tube member.
In any of the above-described technical solution, optionally, the control module is additionally coupled to load drive module connection, with
For exporting inverter control signal to the load drive module.
Embodiment according to the second aspect of the invention provides a kind of air conditioner, comprising: such as first aspect present invention skill
Circuit of power factor correction described in art scheme.
Specifically, circuit of power factor correction is applied in the motor driven systems of compressor, by being in detection circuit
It is no over-current phenomenon avoidance occur, it causes motor speed too fast when preventing overcurrent, compressor is caused demagnetization phenomenon occur.
Additional aspect and advantage of the invention will provide in following description section, will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the schematic diagram of circuit of power factor correction in the related technology；
Fig. 2 shows the schematic diagrames of the circuit of power factor correction according to the present invention for applying example.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Embodiment one
As shown in Fig. 2, circuit of power factor correction according to an embodiment of the invention, is suitable for air conditioner, comprising:
Power factor correction module 10 receives the power supply signal of AC power source, and the power factor correction module includes switching tube, described
Switching tube is configured as controlling the power supply signal to load supplying；First reactor L1 and the second reactor L2, described first
Reactor L1 is set to the firewire of the AC power source, the second reactor L2 is set on the zero curve of the AC power source；
Drive module is connected to the driving input terminal of the switching tube, is used for the switching tube output switching signal；Control module
30, it is connected to the drive module, opens the output switching signal or closing output for controlling the switch drive module
The switching signal.
In the technical scheme, by alternating current firewire with the first reactor L1 and the second reactor L2, relative to list
Reactor circuit, on the one hand, can show the effect of two reactors superposition, on the other hand, the big of assembly difficulty can be replaced
Size reactor, is mounted in circuit of power factor correction, to reduce installation difficulty.
In addition, controlling drive module output in executing PFC operating process by control module 30 and corresponding to
Switch control signal, so as to charging path or discharge path are correspondingly formed in power factor correction module 10, to realize all-wave
Power factor emendation function under rectification mode.
Embodiment two
In the above-mentioned technical solutions, optionally, further includes: Hall current sensor 40 is set to the power factor school
The exchange input side of positive module 10, to acquire input current, and is converted to voltage signal for the input current；Driving protection mould
Block 50 is connect with the Hall current sensor 40 and the control module 30, for according to the voltage signal with it is corresponding
Secure threshold between relationship, it is determined whether 30 output protection signal of Xiang Suoshu control module, the protection signal is for touching
It sends out control module 30 described and closes the output of the drive module.
In this embodiment, Hall current sensor 40 is set in the ac input end of power factor correction module 10, suddenly
Position of that current sensor 40 based on setting, acquires the input current of power factor correction module 10, and converts electrical current into
In voltage signal output driving protective module 50, to detect whether occurring over-current phenomenon avoidance by driving protective module 50, to detect
In the case where there is over-current phenomenon avoidance, control stops to 10 output switching signal of power factor correction module, on the one hand, due to suddenly
You are not in electrical contact current sensor 40 with circuit-under-test, can not consume the power of tested power supply, therefore do not influence frequency conversion
The efficient low power consumption control of equipment, on the other hand, since Hall current sensor 40 directly acquires power factor correction module 10
Input terminal electric current, make the corresponding different current flow paths when executing different feature operations of power factor correction module 10, than
The left and right bridge arm flow path of such as diagonal bridge arm flow path, the left and right bridge arm flow path on top and lower part, can pass through Hall current
Sensor 40 carries out circuit abnormality detection, therefore can more directly detect whether rectifier 10 exception, Yi Ji occurs
When determining that appearance is abnormal, corresponding exceptional part can determine under different operating conditions, middle use has compared with the existing technology
The driving chip combination sampling resistor of defencive function carries out the scheme of over-current detection, and limitation is smaller, and more has and be directed to
Property and practicability.
Wherein, Hall current sensor 40 is that high current is transformed to secondary small voltage signal using Hall effect
Sensor, small voltage signal is enlarged into normal voltage, that is to say, that Hall current sensor by and associative operation amplifier
40 external output voltage signals, and be compared with the secure threshold built in driving protective module 50, according to the result of the comparison really
Determine whether occur short circuit overcurrent phenomenon in circuit, since Hall current sensor 40 can both measure exchange, can also measure straight
Stream, therefore the exchange input side in power factor correction module 10 both can be set, it also can be set in PFC mould
The DC output side of block 10.
Embodiment three
In any of the above-described embodiment, optionally, further includes: zero crossing detection module 60 is arranged in the AC power source
Zero line and zero line side N between, and be connected to the control module 30, the zero crossing detection module 60 is for acquiring the fire
Zero passage detection signal between line end and the zero line side N；The control module 30 is also used to: according to the zero crossing detection module
The phase state of AC power source is stated described in the zero passage detection signal of 60 outputs is determining, to control according to the phase state to described
First reactor L1 and the second reactor L2 carries out charge or discharge.
In this embodiment by being arranged the first reactor L1 and the second reactor L2 in power factor correction module 10
Ac input end and AC power source between, AC power source carry out exchange output when, reactor can will be supplied from AC power source
The electric energy given is converted to magnetic energy using as energy stores, and boosting and the function of pfc circuit can be realized by discharging the energy
The improvement of rate factor.
Specifically, by the way that zero crossing detection module 60 is arranged between firewire and zero curve, to be judged by zero crossing detection module 60
The real-time phase of AC power source, so as to according to derailing switch different in different phase state driving power factor correcting modules 10
Part executes switch operation, to realize rectification function or PFC (PFC) function respectively, to be realized based on rectification function
The direct current supply of load end, or controlled by PFC, make to exchange side voltage and ac-side current reaches consistent in phase.
In addition, there are many reason of generating over-current phenomenon avoidance, for example circuit is interfered and causes 30 crash reset of control module, or
Short circuit exception etc. occurs for person's reactor.
In any of the above-described technical solution, optionally, the Hall current sensor 40 is set to first reactance
Between device L1 and zero line and/or the Hall current sensor 40 is set between the second reactor L2 and zero line side.
Example IV
As shown in Fig. 2, optionally, the power factor correction module 10 is opened by first in any of the above-described embodiment
It closes pipe Q1, second switch Q2, third switching tube Q3 to construct to be formed with the 4th switching tube Q4, first switch tube Q1 and second switch
Pipe Q2 is set to the top of power factor correction module 10, and third switching tube Q3 and the 4th switching tube Q4 are set to power factor school
The lower part of positive module 10, first switch tube Q1 and third switching tube Q3 are set to the left part of power factor correction module 10, and second
Switching tube Q2 and the 4th switching tube Q4 is set to the right part of power factor correction module 10, the first switch tube Q1, described
Two switching tube Q2, the third switching tube Q3 and the included freewheeling diode of the 4th switching tube Q4, by the first switch
The drain electrode of pipe Q1 and the drain series of the second switch Q2, and tie point is determined as the power factor correction module 10
Cathode output end, by the source series of the source electrode of the third switching tube Q3 and the 4th switching tube Q4, and by tie point determine
The cathode output end of the power factor correction module 10, and be grounded, by the source electrode of the first switch tube Q1 and the third
The drain series of switching tube Q3, and tie point is connected to the zero line, by the source electrode of the second switch Q2 with it is described
The drain series of 4th switching tube Q4, and tie point is connected to the zero line side N.
Specifically, first switch tube Q1, second switch Q2, third switching tube Q3 and the 4th switching tube Q4 all can be
MOSFT (Mta-Oxid-Smicoductor Fid-ffct TrasIstor, Metal Oxide Semiconductor Field Effect Transistor, i.e.,
Metal-oxide-semiconductor), such as superjunction MOSFT or SiC-MOSFT.
The working method of metal-oxide-semiconductor, controls on-off between source electrode and drain electrode by grid and realizes and switch, and when conducting needs grid
Power supply is greater than source electrode power supply.
In this embodiment, by the way that the power factor correction module 10 being made of four switching tubes is arranged, in conjunction with control mould
The control instruction that block 30 exports, control circuit executes rectifying operation or PFC operation respectively, as motor driven
When the composition part of system, risen by being alternately carried out " power-factor improvement movement " and " synchronous rectification movement "
Pressure, to achieve the purpose that improve the permission limit of motor speed, and during the work time, by increasing setting electricity in circuit
Current transformer and Hall current inductor, to detect running current, and detect there is current anomaly in the case where, control
Power factor correction module 10 stops working, and reruns after Abnormality remove, to guarantee the safety of motor driven process.
In this embodiment, Hall current sensor is arranged by the ac input end in power factor correction module 10
40, no matter rectifying operation or PFC operation are being executed, is thering is electric current to flow through Hall current sensor 40, thus
When having detected that electric current flows through hall device, which will export corresponding voltage, according to the four of power factor correction module 10
The current value that a switching tube is able to bear, in the over-current detection unit built in driving protective module 50 or Hall current sensor 40
Middle setting needs voltage value to be protected, and first switch tube Q1 is connected on firewire between zero curve in second switch Q2, and third is opened
It closes pipe Q3 and is connected on firewire between zero curve in the 4th switching tube Q4, when first switch tube Q1- second switch Q2 or third
When abnormal overcurrent occurs in the 4th switching tube Q4 of switching tube Q3-, which will export relevant voltage by Hall current sensor 40
And driving protective module 50 is triggered, and then turn off the switching signal of drive module, so that the overcurrent for realizing switch tube is protected, when
Over-current signal releases, control of the driving protective module 50 by releasing to overcurrent drive module, to restore to work normally, thus whole
The timely and effectively detection that can be achieved in operating process or during PFC to the higher failure of likelihood ratio is flowed,
To achieve the purpose that promote the safety of entire pfc circuit.
It, can be with base in different current flow paths for the circuit of power factor correction of Hall current sensor 40 is arranged
Voltage is sampled in Hall current sensor 40, and short circuit is determined whether there is now according to the testing result of sampled voltage
As, therefore can satisfy first switch tube Q1 in power factor correction module 10, second switch Q2, third switching tube Q3 and
The detection demand for the flow path that the combining form of four switching tube Q4 is formed.
In any of the above-described embodiment, optionally, the drive module includes for driving the first switch tube Q1
With the first drive module 202 of the third switching tube Q3, and for driving the second switch Q2 to open with the described 4th
Close the second drive module 204 of pipe Q4, wherein if the driving protective module 50 is detecting that it is safe that the voltage signal is greater than
Threshold value and/or the pressure drop are greater than the second default secure threshold, then trigger the control module 30 and close the first driving mould
The driving of block 202 and second drive module 204 exports
In this embodiment, drive module includes the first drive module 202 and the second drive module 204, to realize that H bridge is whole
Manage the half-bridge driven of device.
In addition, those skilled in the art can understand that, control module 30 controls drive module and stops driving output
When, it is while controls the first drive module 202 and the stopping output of the second drive module 204, is i.e. two drive modules has identical
Execution priority.
In any of the above-described embodiment, optionally, further includes: bus capacitor E, one end of the bus capacitor are connected to
The cathode output end, the other end ground connection of the bus capacitor, drive module export the switching signal, pass through the exchange
Power supply charges to the bus capacitor or bus capacitor electric discharge, drive module do not export the switching signal, the bus
Capacitor electric discharge.
Embodiment five
As shown in Fig. 2, optionally, the Hall current sensor 40 is arranged described in any of the above-described embodiment
Between AC power source and the reactor；The driving protective module 50 is also used to: if detecting, the voltage signal is greater than peace
Full threshold value then exports the protection signal to the control module 30, to close the output of the drive module.
Wherein, Hall current sensor 40 can be placed in any position of the concatenated firewire of reactor or zero curve.
In this embodiment, Hall current sensor is arranged by the ac input end in power factor correction module 10
40, no matter rectifying operation or PFC operation are being executed, is thering is electric current to flow through Hall current sensor 40, thus
When having detected that electric current flows through hall device, which will export corresponding voltage, according to the four of power factor correction module 10
The current value that a switching tube is able to bear, in the over-current detection unit built in driving protective module 50 or Hall current sensor 40
Middle setting needs voltage value to be protected, and first switch tube Q1 is connected on firewire between zero curve in second switch Q2, and third is opened
It closes pipe Q3 and is connected on firewire between zero curve in the 4th switching tube Q4, when first switch tube Q1- second switch Q2 or third
When abnormal overcurrent occurs in the 4th switching tube Q4 of switching tube Q3-, which will export relevant voltage by Hall current sensor 40
And driving protective module 50 is triggered, and then turn off the switching signal of drive module, so that the overcurrent for realizing switch tube is protected, when
Over-current signal releases, control of the driving protective module 50 by releasing to overcurrent drive module, to restore to work normally, thus whole
The timely and effectively detection that can be achieved in operating process or during PFC to the higher failure of likelihood ratio is flowed,
To achieve the purpose that promote the safety of entire pfc circuit.
It, can be with base in different current flow paths for the circuit of power factor correction of Hall current sensor 40 is arranged
Voltage is sampled in Hall current sensor 40, and short circuit is determined whether there is now according to the testing result of sampled voltage
As, therefore can satisfy first switch tube Q1 in power factor correction module 10, second switch Q2, third switching tube Q3 and
The detection demand of the difference combination flow path of four switching tube Q4.
First switch tube Q1 and third switching tube Q3 is driven using the first drive module 202, second switch Q2 and the 4th
Switching tube Q4 is driven using the second drive module 204, and the voltage signal that Hall current sensor 40 exports is output to driving protection
Module 50, when driving protective module 50 detects that the voltage signal that Hall current sensor 40 exports will be forced to close beyond preset value
Disconnected first drive module 202 and the second drive module 204, thus four switching tubes of protection.
Embodiment six
In any of the above-described embodiment, optionally, the control module 30 is also used to: if the input of the AC power source
Voltage is in positive half cycle, then controls the drive module output for making the first switch tube Q1 and the 4th switching tube Q4
The switching signal of conducting, and bypass corresponding freewheeling diode；The control module 30 is also used to: if the AC power source is defeated
Enter voltage and be in negative half period, then controls the drive module output for making the second switch Q2 and the third switching tube
The switching signal of Q3 conducting, and corresponding freewheeling diode is bypassed, to realize synchronous rectification.
Wherein, there is freewheeling diode in the inside of first switch tube Q1, freewheeling diode is in first switch tube Q1
The part of existing P knot, the saturation voltage of first switch tube Q1 are (electric between the drain-source under on-state between source electrode and drain electrode
Pressure) lower than the positive voltage drop of freewheeling diode.Electric current is flowed through in the source drain of first switch tube Q1 as a result, and is being posted
It flows through electric current in raw diode to compare, voltage drop becomes smaller, or even can reduce conduction losses.It is easy-to-understand to and says, is connecting shape
Electric current is flowed through in the first switch tube Q1 of state and flows through electric current in the freewheeling diode in the first switch tube Q1 of off-state
It compares, conduction losses is made to become smaller, in addition, for other second switch Q2, third switching tube Q3 and the 4th switching tube Q4
It is applicable in.
In this embodiment, by the principle using metal-oxide-semiconductor low conduction voltage drop, phase is opened according to the phase state of alternating current
Low-power consumption synchronous rectification can be realized in the metal-oxide-semiconductor answered.
It is answered specifically, the current alternating current phases that control module 30 is detected according to zero crossing detection module 60 carry out output phase
Control signal, drive corresponding switching tube to work.
In the related technology, when synchronizing rectification, in AC power source positive half cycle, electric current passes through Hall current sensor
40 and reactor, then rectified to system power supply, at this time by first switch tube Q1 in the freewheeling diode of the 4th switching tube Q4
Since freewheeling diode pressure drop is larger, energy waste is caused.
In this embodiment, control module 30 judges to open in the positive half cycle of AC power source according to zero crossing detection module 60 at this time
When the beginning, electric current passes through Hall current sensor 40 and reactor, and output switching signal drives the switch of first switch tube Q1 and the 4th
Pipe Q4 conducting, makes the electric current for flowing through freewheeling diode on first switch tube Q1 and the 4th switching tube Q4 flow through metal-oxide-semiconductor, utilizes MOS
The low on state characteristic of pipe bypasses freewheeling diode, to reduce conduction loss.Similarly in AC power source negative half period, mould is controlled
Block 30 then controls and opens second switch Q2 and third switching tube Q3, and four metal-oxide-semiconductors is made to realize synchronous rectification, whole synchronizing
During stream, by detecting whether over-current phenomenon avoidance occur to by the current detecting on Hall current sensor 40.
Embodiment seven
In any of the above-described embodiment, optionally, the control module 30 is also used to: if the input of the AC power source
Voltage is in positive half cycle, then according to the zero passage detection signal and the switching signal control the third switching tube Q3 with it is described
4th switching tube Q4 opening and closing, the third switching tube Q3 are connected with the 4th switching tube Q4, to carry out to the reactor L1
Charging turns off the third switching tube Q3 and the 4th switching tube Q4, the first switch tube Q1 conducting, the reactor L1
It powers to the load；The control module 30 is also used to: if the input voltage of the AC power source is in negative half period, according to
Zero passage detection signal and the switching signal control the third switching tube Q3 and the 4th switching tube Q4 and are opened and closed, the third
Switching tube Q3 is connected with the 4th switching tube Q4, to charge to the reactor L1, turns off the third switching tube Q3
With the 4th switching tube Q4, the second switch Q2 is driven to be connected, the reactor L1 powers to the load, to realize power
Factor correcting.
In this embodiment, in circuit for when input is in the positive half cycle of AC power source, controlling when carrying out PFC operation
Molding block 30 drives third switching tube Q3 to be connected with the 4th switching tube Q4, charges to reactor according to zero passage detection signal,
When turning off third switching tube Q3 and the 4th switching tube Q4, control module 30 drives first switch tube Q1 to open, reactor storage
Electric energy will be released to late-class circuit by first switch tube Q1, to bus capacitor E and load (such as motor) power supply, inputting
When negative half period in AC power source, control module 30 drives third switching tube Q3 to switch with the 4th according to zero passage detection signal
Pipe Q4 conducting, charges to reactor, and when turn off third switching tube Q3 and the 4th switching tube Q4, control module 30 drives the
Two switching tube Q2 open, reactor storage electric energy will be released to late-class circuit by second switch Q2, to bus capacitor E with
(such as motor) power supply is loaded, by discharging the energy put aside in reactor to bus capacitor E, to the direct current of bus capacitor E
Voltage boosts, and so as to reduce the distortion of current waveform by short circuit current, makes current waveform close to sine wave, into
And the power factor of pfc circuit can be improved, further, by according to the busbar voltage of load calculate third switching tube Q3 or
The pulsewidth of first switch tube Q1 can reasonably adjust the duration of pfc circuit short circuit currents, be closed according to pulse change number
Reason controls the number of each switch conduction/shutdown, can reduce the conduction losses of switch unit, reduces switching loss, improves effect
Rate.
In any of the above-described embodiment, optionally, further includes: load drive module 70 is connected to the power factor
The DC output end of correction module 10, for receiving the direct current output of the power factor correction module 10, to load supplying；
DC bus-bar voltage detection module (not shown) is connected to the DC output end of the power factor correction module 10, and
It is arranged in parallel with the load drive module 70, for detecting DC bus-bar voltage.
In this embodiment, in the application scenarios that load is motor, load drive module 70 is used for constant voltage DC is inverse
Become three-phase alternating current output, powered with realizing to motor, in conjunction with the setting of DC bus-bar voltage detection module, by power because
The detection of the busbar voltage of the direct current output of number correction module 10 and the detection of the input voltage, control PFC
Pulsewidth in module 10 when switch state and each switching tube conducting of each switching tube member.
In any of the above-described embodiment, optionally, the control module 30 is additionally coupled to load drive module 70 and connects,
For exporting inverter control signal to the load drive module 70.
The air conditioner of embodiment according to the present invention, comprising: the electricity of PFC described in any of the above-described embodiment
Road.
Specifically, circuit of power factor correction is applied in the motor driven systems of compressor, by being in detection circuit
It is no over-current phenomenon avoidance occur, it causes motor speed too fast when preventing overcurrent, compressor is caused demagnetization phenomenon occur.
Compared with prior art, embodiment disclosed in technical scheme at least have it is following the utility model has the advantages that
(1) by alternating current firewire with the first reactor and the second reactor, relative to single reactor circuit, a side
Face can show the effect of two reactors superposition, on the other hand, can replace the large scale reactor of assembly difficulty, installation
In circuit of power factor correction, to reduce installation difficulty.
(2) it is not in electrical contact with circuit-under-test in Hall current sensor, the power of tested power supply can not be consumed, because
This does not influence the efficient low power consumption control of frequency conversion equipment, and lesion Hall current sensor directly acquires power factor correction module
Input terminal electric current makes power factor correction module corresponding different current flow paths when executing different feature operations, such as right
Angle bridge arm flow path, the left and right bridge arm flow path on top and left and right bridge arm flow path of lower part etc., can be sensed by Hall current
Device carries out circuit abnormality detection, therefore can more directly detect whether rectifier exception occurs, and occurs determining
When abnormal, corresponding exceptional part can determine under different operating conditions, it is middle using with defencive function compared with the existing technology
Driving chip combination sampling resistor carry out over-current detection scheme, limitation is smaller, and more have specific aim with it is practical
Property.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
It should be noted that in the claims, any reference symbol between parentheses should not be configured to power
The limitation that benefit requires.Word "comprising" does not exclude the presence of component or step not listed in the claims.Before component
Word "a" or "an" does not exclude the presence of multiple such components.The present invention can be by means of including several different components
It hardware and is realized by means of properly programmed computer.If in the module claim for listing equipment for drying, these dresses
Several in setting, which can be, to be embodied by the same item of hardware.The use of word first, second, and third is not
Indicate any sequence.These words can be construed to title.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from right of the present invention by those skilled in the art
It is required that and its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (11)
1. a kind of circuit of power factor correction characterized by comprising
Power factor correction module receives the power supply signal of AC power source, and the power factor correction module includes switching tube, institute
It states switching tube and is configured as controlling the power supply signal to load supplying；
First reactor and the second reactor, first reactor are set to the firewire of the AC power source, second electricity
Anti- device is set on the zero curve of the AC power source；
Drive module is connected to the driving input terminal of the switching tube, is used for the switching tube output switching signal；
Control module is connected to the drive module, opens the output switching signal for controlling the switch drive module
Or close and export the switching signal,
Wherein, Active PFC operation is executed, the drive module is controlled by the control module and exports corresponding switch control
Signal processed controls the drive module by the switch control signal and exports the switching signal, to first reactor
It charges with second reactor, or is discharged by first reactor and second reactor.
2. circuit of power factor correction according to claim 1, which is characterized in that further include:
Current sensor is set to the exchange input side of the power factor correction module, to acquire input current, and will be described
Input current is converted to voltage signal；
Drive protective module, connect with the Hall current sensor and the control module, the sampled signal if more than
Secure threshold, secure threshold is then to the control module output protection signal, and the protection signal is for triggering the control mould
Block closes the output of the drive module.
3. circuit of power factor correction according to claim 2, which is characterized in that further include:
Zero crossing detection module is arranged between the zero line and zero line side of the AC power source, and is connected to the control module,
The zero crossing detection module is used to acquire the zero passage detection signal between the zero line and the zero line side；
The control module is also used to: if executing PFC operation, the mistake exported according to the zero crossing detection module
Zero detection signal determines the phase state of the AC power source, to be opened according to phase state determination the drive module
Control signal is closed, charge or discharge are carried out to first reactor and second reactor with control.
4. circuit of power factor correction according to claim 2, which is characterized in that
The current sensor is set between first reactor and zero line, and/or
The current sensor is set between second reactor and zero line side.
5. circuit of power factor correction according to claim 4, which is characterized in that
The power factor correction module constructs shape by first switch tube, second switch, third switching tube and the 4th switching tube
At included two pole of afterflow of the first switch tube, the second switch, the third switching tube and the 4th switching tube
Tie point by the drain electrode of the first switch tube and the drain series of the second switch, and is determined as the power by pipe
The cathode output end of factor correcting module, by the source series of the source electrode of the third switching tube and the 4th switching tube, and will be even
Contact is determined as the cathode output end of the power factor correction module, and the source electrode of the first switch tube and the third are opened
The drain series of pipe are closed, and tie point is connected to the zero line, the source electrode of the second switch is opened with the described 4th
The drain series of pipe are closed, and tie point is connected to the zero line side.
6. circuit of power factor correction according to claim 5, which is characterized in that
The drive module includes the first drive module for driving the first switch tube Yu the third switching tube, and
For driving the second drive module of the second switch Yu the 4th switching tube,
Wherein, if the driving protective module detect the voltage signal be greater than secure threshold, trigger the control mould
Block closes first drive module and the driving of second drive module exports.
7. circuit of power factor correction according to claim 5, which is characterized in that
The control module is also used to: if the input voltage of the AC power source is in positive half cycle, controlling the drive module
The switching signal for the first switch tube to be connected with the 4th switching tube is exported, and bypasses corresponding two pole of afterflow
Pipe；
The control module is also used to: if the input voltage of the AC power source is in negative half period, controlling the drive module
The switching signal for the second switch to be connected with the third switching tube is exported, and bypasses corresponding two pole of afterflow
Pipe, to realize synchronous rectification.
8. circuit of power factor correction according to claim 5, which is characterized in that
The control module is also used to: if the input voltage of the AC power source is in positive half cycle, according to the zero passage detection
Signal and the switching signal control the third switching tube and the 4th switching tube is opened and closed, the third switching tube with it is described
The conducting of 4th switching tube, to charge to the reactor, turns off the third switching tube and the 4th switching tube, described
First switch tube conducting, the reactor power to the load；
The control module is also used to: if the input voltage of the AC power source is in negative half period, according to the zero passage detection
Signal and the switching signal control the third switching tube and the 4th switching tube is opened and closed, the third switching tube with it is described
The conducting of 4th switching tube, to charge to the reactor, turns off the third switching tube and the 4th switching tube, drives
The second switch conducting, the reactor powers to the load, to realize PFC.
9. the circuit of power factor correction according to any one of claim 5 to 8, which is characterized in that further include:
Bus capacitor, one end of the bus capacitor are connected to the cathode output end, and the other end of the bus capacitor is grounded,
Drive module exports the switching signal, is charged by the AC power source to the bus capacitor or the bus capacitor is put
Electricity, drive module do not export the switching signal, the bus capacitor electric discharge.
10. the circuit of power factor correction according to any one of claim 5 to 8, which is characterized in that further include:
Load drive module, be set between the cathode output end and the cathode output end, for receive the power because
The direct current output of number correction module, to load supplying；
The control module is additionally coupled to load drive module connection, for exporting inversion control to the load drive module
Signal.
11. a kind of air conditioner characterized by comprising the PFC electricity as described in any one of claims 1 to 10
Road.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910415197.8A CN109980914A (en) | 2019-05-17 | 2019-05-17 | Circuit of power factor correction and air conditioner |
| JP2021568656A JP2022533375A (en) | 2019-05-17 | 2019-11-11 | Power factor correction circuit and air conditioner |
| PCT/CN2019/117015 WO2020232994A1 (en) | 2019-05-17 | 2019-11-11 | Power factor correction circuit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910415197.8A CN109980914A (en) | 2019-05-17 | 2019-05-17 | Circuit of power factor correction and air conditioner |
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| CN109980914A true CN109980914A (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910415197.8A Pending CN109980914A (en) | 2019-05-17 | 2019-05-17 | Circuit of power factor correction and air conditioner |
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| WO2020232994A1 (en) * | 2019-05-17 | 2020-11-26 | 广东美的制冷设备有限公司 | Power factor correction circuit and air conditioner |
| WO2020232995A1 (en) * | 2019-05-17 | 2020-11-26 | 广东美的制冷设备有限公司 | Power factor correction circuit and air conditioner |
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