CN110034671A - Circuit of power factor correction and air conditioner - Google Patents
Circuit of power factor correction and air conditioner Download PDFInfo
- Publication number
- CN110034671A CN110034671A CN201910413442.1A CN201910413442A CN110034671A CN 110034671 A CN110034671 A CN 110034671A CN 201910413442 A CN201910413442 A CN 201910413442A CN 110034671 A CN110034671 A CN 110034671A
- Authority
- CN
- China
- Prior art keywords
- module
- switching tube
- factor correction
- power factor
- signal
- 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.)
- Pending
Links
- 238000012937 correction Methods 0.000 title claims abstract description 86
- 238000001514 detection method Methods 0.000 claims abstract description 97
- 230000001681 protective effect Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 13
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 23
- 239000004065 semiconductor Substances 0.000 description 17
- 230000002159 abnormal effect Effects 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 13
- 238000005070 sampling Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000005856 abnormality Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 230000005669 field effect Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003071 parasitic 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- 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 power supply signal, power factor correction module includes switching tube, and switching tube is configured as control power supply signal to load supplying；Drive module is connected to the driving input terminal of switching tube, is used for power factor correction module output switching signal；Control module is connected to drive module, opens output switching signal or closing output switching signal for controlling drive module；Current transformer is set to the input side of power factor correction module, inputs detection signal with acquisition；Hall current inductor is set to the outlet side of power factor correction module, exports detection signal with acquisition；Driving protective module is connect with control module, current transformer and Hall current inductor.According to the technical solution of the present invention, it can more directly detect whether rectifier occurs exception, the practicability of detection mode is higher.
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
In the related technology, circuit of power factor correction (power factor correction, i.e. pfc circuit) is using big
Power MOS switch technology substitutes IGBT device as main power device, replaces IGBT to be connected using the characteristic of the low conduction impedance of MOS
The characteristic of pressure drop constant realizes the lower power consumption under middle low power, to realize the power consumption for reducing air conditioner.
Power factor correction module is constituted using four switching tubes, and using two half-bridge driven chip drivings, wherein one
A driving chip has defencive function, carries out over-current detection in conjunction with sampling resistor, if detecting high current, triggers closing to four
The driving of a switch exports, and to carry out overcurrent protection, but the program has the following deficiencies:
As shown in Figure 1, existing protection scheme can only realize that upper and lower Q1 and Q3 abnormal or upper and lower Q2 and Q4 occur and go out
Detection when now abnormal, and in practical applications up and down two switching tubes since drive module itself can built-in interlock protection electricity
Road, upper and lower bridge arm is straight-through to be difficult to occur, so the probability that the corresponding failure of the protection scheme using sampling resistor occurs is very low,
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 power supply signal, and the power factor correction module includes switching tube, described to open
It closes pipe and is configured as controlling the power supply signal to load supplying；Drive module is connected to the driving input terminal of the switching tube,
For to the power factor correction module output switching signal；Control module is connected to the drive module, for controlling
Drive module is stated to open the output switching signal or close the output switching signal；Current transformer is set to the function
The input side of rate factor correcting module inputs detection signal with acquisition；Hall current inductor is set to the power factor school
The outlet side of positive module exports detection signal with acquisition；Protective module is driven, with the control module, the current transformer
And the Hall current inductor connection, for the inspection according to the input detection signal and/or the output detection signal
It surveys as a result, determining whether the control module output protection signal, the protection signal is closed for triggering the control module
Close the driving output of the drive module.
In the technical scheme, input terminal is acquired in the ac input end setting current transformer of power factor correction module
Current signal, and voltage signal is converted to, to detect signal as input, and sensed in DC output end setting Hall current
Device acquires output end current signal, and is converted to voltage signal, to detect signal as output, by will input detection signal and
Output detection signal is transmitted separately in driving protective module, to detect whether occurring over-current phenomenon avoidance by driving protective module, with
Detect there is over-current phenomenon avoidance in the case where, control stop to power factor correction module output switching signal, due to electric current
Mutual inductor and Hall current sensor directly acquire the input terminal electric current and output end current of power factor correction module, make power
Factor correcting module corresponding different current flow paths when executing different feature operations can be acquired by the sensor
It arrives, and carries out circuit abnormality detection, therefore can more directly detect whether rectifier exception occurs, and determining
When now abnormal, corresponding exceptional part can determine under different operating conditions, it is middle using with protection function compared with the existing technology
The driving chip combination sampling resistor of energy carries out the scheme of over-current detection, and limitation is smaller, and more has specific aim and reality
The property used.
Wherein, those skilled in the art can understand that, current transformer is will be primary according to electromagnetic induction principle
The instrument that side high current is converted to secondary side low current to measure, current transformer are applied to the measurement occasion of power frequency heavy-current,
To realize unsteady flow and electrical isolation function, it is based on electromagnetic induction principle, output voltage is directly proportional to the change rate of ac-side current,
Therefore it can accurately detect whether exchange side over-current phenomenon avoidance occurs, be believed by current transformer acquisition by the electric current of reactor
Number, and switch to corresponding voltage signal and be conveyed to driving protective module, with the voltage signal acquired based on current transformer, judgement
Whether over-current phenomenon avoidance is occurred.
Hall current sensor is the sensing that a 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 is externally defeated by device, and associative operation amplifier
Voltage signal out, and be compared with the secure threshold built in driving protective module, determining in circuit according to the result of the comparison is
It is no short circuit overcurrent phenomenon occur, since Hall current sensor can both measure exchange, direct current can also be measured, is set in exchange side
Under the premise of being equipped with current transformer, by power factor correction module setting in DC output side, with based on current transformer with
Whether the cooperation between Hall current sensor there is over-current phenomenon avoidance in detection circuit.
In any of the above-described technical solution, optionally, further includes: the first reactor and the second reactor, the first reactance
Device is set to the firewire of AC power source, second reactor is set on the zero curve of the AC power source；Zero crossing detection module,
It 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
For acquiring the zero passage detection signal between the zero line and the zero line side；The control module is also used to: according to described
The phase state that AC power source is stated described in the zero passage detection signal of zero crossing detection module output is determining, according to the phase state
Corresponding switch control signal is exported to the drive module, wherein the AC power source is for exporting the power supply signal, institute
It states current transformer to be set between the zero line of the AC power source and first reactor, or is set to the alternating current
Between the zero line side in source and second reactor.
In the technical scheme, by the way that two the first reactors and the second reactor in parallel are arranged, 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.
Further, by the way that in parallel 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, the first reactor and the second reactor in parallel
The electric energy supplied from AC power source can be converted to magnetic energy using as energy stores, and can be realized by discharging the energy
The boosting of pfc circuit and the improvement of power factor.
In addition, by the way that zero crossing detection module is arranged between firewire and zero curve, to judge alternating current by zero crossing detection module
The real-time phase in source, to be opened according to switching device execution different in different phase state driving power factor correcting modules
Operation is closed, 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 reaches consistent in phase.
Wherein, 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 the first reactor and the second reactor in parallel.
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
First output end of the outlet side, by the source series of the source electrode of the third switching tube and the 4th switching tube, and will connection
Point is determined as the second output terminal of the outlet side, by the drain electrode string of the source electrode of the first switch tube and the third switching tube
Connection, and tie point is connected to the zero line, by the drain electrode string of the source electrode of the second switch and the 4th switching tube
Connection, 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.
Wherein, Hall current sensor at least has following two set-up mode:
In any of the above-described technical solution, optionally, the Hall current sensor is set to the of the outlet side
Between one output end and the successive load of the circuit of power factor correction.
In any of the above-described technical solution, optionally, the Hall current sensor is set to the of the outlet side
Between one output end and ground terminal.
In the technical scheme, the first output end in direct current output had both can be set in Hall current sensor, can also be with
The second output terminal of direct current output is set, to judge the PFC by the direct-flow output signal of detection output
Whether there is over-current phenomenon avoidance in circuit, replaces sampling resistor in the prior art to carry out sampling behaviour using Hall current sensor
Make, on the one hand, can not be influenced by size of current, on the other hand, different half cycles is in based on AC power source, there is difference
Current flow path, different current flow paths correspond to different switching tube combinations, thus compared with the existing technology for, the detection of application
Range is wider.
In addition, being incorporated in the ac input end setting current transformer of power factor correction module, no matter rectification is being executed
Operation or PFC operation, have electric current to flow through current transformer, thus having detected that it is mutual that electric current flows through electric current
When sensor, corresponding voltage is exported as input detection signal, can be held according to the four of power factor correction module switching tubes
The current value received, setting needs voltage to be protected in the over-current detection unit built in driving protective module or current transformer
Value, first switch tube are connected on firewire between zero curve in second switch, and third switching tube is connected on fire in the 4th switching tube
Line is between zero curve, when first switch tube-second switch or the-the four switching tube of third switching tube appearance exception overcurrent,
The electric current will export relevant voltage by current transformer and trigger driving protective module, and then turn off the switch letter of drive module
Number, to protect the overcurrent for realizing switch tube, when overcurrent signal relief, drive protective module that will release to overcurrent drive module
Control, to restore to work normally, thus during rectifying operation or PFC during can be achieved to probability
The timely and effectively detection of relatively high failure, to achieve the purpose that promote the safety of entire pfc circuit.
In addition, those skilled in the art can understand that, based on current transformer triggering generate protection signal with
The priority that the protection signal generated is triggered based on Hall current sensor is identical, any to be abnormal triggering driving guarantor all the way
Module is protected, overcurrent reason may perhaps surge interference causes control module crash reset or reactor by electromagnetism for circuit
Short circuit exception etc. occurs.
Wherein, the voltage output signal of current transformer and Hall current sensor is connected to driving protection location, works as drive
Dynamic protection location detects that current transformer and the voltage signal of Hall current sensor output will be forced shutdown beyond preset value
First drive module and the second drive module, to protect the defencive function realized to four switching tubes.Wherein current transformer
Be in order to protect when first switch tube and second switch occur short circuit it is abnormal when detection or third switching tube and the 4th open
Detection when short circuit exception occurs for pipe is closed, Hall current sensor is short in order to protect first switch tube and the 4th switching tube to occur
Detection when short circuit exception occurs for detection or second switch and third switching tube when the exception of road.
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 detect input detection signal be greater than the first secure threshold and/
Or the output detection signal is greater than the second secure threshold, then triggers the control module and close first drive module and institute
State the driving output of the second drive module.
In the technical scheme, drive module includes the first drive module and the second drive module, to realize power factor
The half-bridge driven of correction module.
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.
In any of the above-described technical solution, optionally, further includes: bus capacitor, one end connection of the bus capacitor
To first 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 current transformer and electricity
Anti- device, then the freewheeling diode by first switch tube in the 4th switching tube is rectified to system power supply, at this time due to afterflow two
Pole pipe pressure drop is larger, 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 current transformer and reactor, and output switching signal driving first switch tube is connected with the 4th switching tube, makes to flow
It crosses that first switch tube, the electric current of freewheeling diode flows through metal-oxide-semiconductor on Hall current sensor and the 4th switching tube, utilizes metal-oxide-semiconductor
Low on state characteristic, bypass freewheeling diode, to reduce conduction loss.Similarly in AC power source negative half period, control module
Then second switch and third switching tube are opened in control, so that four metal-oxide-semiconductors is realized synchronous rectification, in synchronous rectification process
In, by detecting whether over-current phenomenon avoidance occur to by the current detecting on current transformer and Hall current sensor.
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 third switching tube and described the according to the zero passage detection signal and the switching signal
The opening and closing of four switching tubes, the third switching tube is connected with the 4th switching tube, to charge to the reactor, turns off institute
Third switching tube and the 4th switching tube, the first switch tube conducting are stated, the reactor powers to the load；The control
Module is also used to: if the input voltage of the AC power source is in negative half period, being opened according to the zero passage detection signal with described
OFF signal controls the third switching tube and the 4th switching tube is opened and closed, and the third switching tube is led with the 4th switching tube
It is logical, to charge to the reactor, the third switching tube and the 4th switching tube are turned off, the second switch is driven
Pipe conducting, the reactor powers to the load, to 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 to reactor, work as pass according to zero passage detection signal
When disconnected third switching tube and four switching tubes, control module drives first switch tube to open, and the electric energy of reactor storage will pass through
First switch tube is released to late-class circuit, to bus capacitor and load (such as motor) power supply, in input in AC power source
When negative half period, control module drives third switching tube to be connected with the 4th switching tube according to zero passage detection signal, carries out to reactor
Charging, when turning off third switching tube and four switching tubes, control module drives second switch to open, the electricity of reactor storage
Energy will be released to late-class circuit by second switch, to bus capacitor and load (such as motor) power supply, by electric to bus
Hold the energy that release is put aside in reactor, boosts to the DC voltage of bus capacitor, so as to pass through short circuit current,
The distortion for reducing current waveform, makes current waveform close to sine wave, and then can improve the power factor of pfc circuit, further
Ground can reasonably adjust pfc circuit by calculating the pulsewidth of third switching tube or first switch tube according to the busbar voltage of load
The duration of short circuit currents rationally controls the number of each switch conduction/shutdown according to pulse change number, can reduce
The conduction losses of switch unit reduce switching loss, improve efficiency.
In any of the above-described technical solution, optionally, the successive load includes: load drive module, is arranged in institute
It states between the first output end and the second output terminal, for receiving the direct current output of the power factor correction module, with right
Load supplying；The load drive module is additionally coupled to the control module, to receive the inversion control of the control module output
Signal processed.
Specifically, the motor to be set in the compressor of air conditioner is loaded.
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.
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 circuit of power factor correction according to an embodiment of the invention.
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 power supply signal, and the power factor correction module includes switching tube, and the switching tube is matched
The control power supply signal is set to load supplying；Drive module is connected to the driving input terminal of the switching tube, is used for institute
State 10 output switching signal of power factor correction module；Control module 30 is connected to the drive module, for controlling the drive
Dynamic model block, which is opened to export the switching signal or close, exports the switching signal；Current transformer 40 is set to the power
The exchange input side of factor correcting module 10 inputs detection signal with acquisition；Hall current inductor, be set to the power because
The DC output side of number correction module 10 exports detection signal with acquisition；Drive protective module 60, with the control module 30,
The current transformer 40 and Hall current inductor connection, for according to input detection signal and/or described
The testing result of output detection signal, it is determined whether 30 output protection signal of Xiang Suoshu control module, the protection signal are used for
Trigger the driving output that the control module 30 closes the drive module.
In this embodiment, input is acquired in the ac input end setting current transformer 40 of power factor correction module 10
Current signal is held, and is converted to voltage signal, to detect signal as input, and is passed in DC output end setting Hall current
Sensor 50 acquires output end current signal, and is converted to voltage signal, to detect signal as output, by that will input detection letter
Number with output detection signal be transmitted separately to driving protective module 60 on, to detect whether occurring overcurrent by driving protective module 60
Phenomenon, with detecting that control stops to 10 output switching signal of power factor correction module in the case where there is over-current phenomenon avoidance,
Due to current transformer 40 directly acquire with Hall current sensor 50 the input terminal electric current of power factor correction module 10 with it is defeated
Outlet electric current lead to the corresponding different current flow paths when executing different feature operations of power factor correction module 10 can
It crosses the sensor to collect, and carries out circuit abnormality detection, therefore can more directly detect whether rectifier occurs
It is abnormal, and when determining that appearance is abnormal, can determine corresponding exceptional part under different operating conditions, compared with the existing technology
The middle scheme that over-current detection is carried out using the driving chip combination sampling resistor with defencive function, limitation is smaller, and more
Add with specific aim and practicability.
Wherein, those skilled in the art can understand that, current transformer 40 is according to electromagnetic induction principle by one
The instrument that secondary side high current is converted to secondary side low current to measure, current transformer 40 are applied to the measurement field of power frequency heavy-current
It closes, to realize unsteady flow and electrical isolation function, based on electromagnetic induction principle, the change rate of output voltage and ac-side current is at just
Than, therefore can accurately detect whether exchange side over-current phenomenon avoidance occurs, the electricity that reactor is passed through by the acquisition of current transformer 40
Signal is flowed, and switchs to corresponding voltage signal and is conveyed to driving protective module 60, with the voltage acquired based on current transformer 40
Signal judges whether over-current phenomenon avoidance occur.
Hall current sensor 50 is the biography that a 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 50 is right by sensor, and associative operation amplifier
Outer output voltage signal, and be compared with the secure threshold built in driving protective module 60, electricity is determined according to the result of the comparison
Whether occur short circuit overcurrent phenomenon in road, since Hall current sensor 50 can both measure exchange, direct current can also be measured,
Under the premise of exchange side is provided with current transformer 40, power factor correction module 10 is arranged in DC output side, to be based on
Whether the cooperation between current transformer 40 and Hall current sensor 50 there is over-current phenomenon avoidance in detection circuit.
Embodiment two
As shown in Fig. 2, in any of the above-described embodiment, optionally, further includes: the first reactor L1 and the second reactor
L2, the first reactor L1 are set to the firewire of the AC power source, the second reactor L2 is set to the AC power source
On zero curve；Zero crossing detection module 70 is arranged between the end firewire L of the AC power source and zero curve N-terminal, and is connected to the control
Molding block 3030, the zero crossing detection module 70 are used to acquire the zero passage detection letter between the end the firewire L and the zero curve N-terminal
Number；The control module 3030 is also used to: being stated according to the zero passage detection signal determination that the zero crossing detection module 70 exports
The phase state of AC power source, to export corresponding switch control signal to the drive module according to the phase state,
In, for the AC power source for exporting the power supply signal, the current transformer 40 is set to the firewire of the AC power source
Hold L and the first reactor L1 between, or be set to the AC power source zero line side N and the second reactor L2 it
Between.
In this embodiment, by the way that two the first reactor L1 and the second reactor L2 in parallel are arranged, relative to single electricity
Anti- device circuit, on the one hand, can show the effect of two reactors superposition, on the other hand, the big ruler of assembly difficulty can be replaced
Very little reactor, is mounted in circuit of power factor correction, to reduce installation difficulty.
Further, by being arranged the first reactor L1 and the second reactor L2 in parallel in power factor correction module
Between 10 ac input end and AC power source, when AC power source carries out exchange output, the first reactor L1 in parallel and the
The electric energy supplied from AC power source can be converted to magnetic energy using as energy stores by two reactor L2, and can should by release
Energy realizes the boosting of pfc circuit and the improvement of power factor.
In addition, by the way that zero crossing detection module 70 is arranged between firewire and zero curve, to judge to hand over by zero crossing detection module 70
The real-time phase in galvanic electricity source, so as to according to switching device different in different phase state driving power factor correcting modules 10
Switch operation is executed, to realize rectification function or PFC (PFC) function respectively, to realize based on rectification function negative
The direct current supply at end is carried, or is controlled by PFC, makes to exchange side voltage and ac-side current reaches consistent in phase.
Wherein, 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 the first reactor L1 and the second reactor L2 of person's parallel connection.
Embodiment three
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 first of the outlet side and is exported
End, by the source series of the source electrode of the third switching tube Q3 and the 4th switching tube Q4, and is determined as the output for tie point
The second output terminal of side, by the drain series of the source electrode of the first switch tube Q1 and the third switching tube Q3, and will connection
Point is connected to the zero line L, by the drain series of the source electrode of the second switch Q2 and the 4th switching tube Q4, and will
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
MOSFET (Metal-Oxide-Semiconductor Field-Effect TransIstor, metal oxide semiconductcor field effect
Answer transistor, 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 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 40 and Hall current inductor, to detect running current, and detect there is current anomaly in the case where, control
Power factor correction module 10 processed stops working, and reruns after Abnormality remove, to guarantee the safety of motor driven process
Property.
Wherein, Hall current sensor 50 at least has following two set-up mode:
In any of the above-described embodiment, optionally, the Hall current sensor 50 is set to the of the outlet side
Between one output end and the successive load of the circuit of power factor correction.
In any of the above-described embodiment, optionally, the Hall current sensor 50 is set to the of the outlet side
Between one output end and ground terminal.
In this embodiment, the first output end in direct current output had both can be set in Hall current sensor 50, can also be with
The second output terminal of direct current output is set, to judge the PFC by the direct-flow output signal of detection output
Whether there is over-current phenomenon avoidance in circuit, sampling behaviour is carried out instead of sampling resistor in the prior art using Hall current sensor 50
Make, on the one hand, can not be influenced by size of current, on the other hand, different half cycles is in based on AC power source, there is difference
Current flow path, different current flow paths correspond to different switching tube combinations, thus compared with the existing technology for, the detection of application
Range is wider.
In addition, being incorporated in the ac input end setting current transformer 40 of power factor correction module 10, no matter executing
Rectifying operation or PFC operation, have electric current to flow through current transformer 40, thus having detected that electric current flows through
When current transformer 40, corresponding voltage is exported as input detection signal, is opened according to the four of power factor correction module 10
The current value that pipe is able to bear is closed, setting in the over-current detection unit built in driving protective module 60 or current transformer 40 needs
Voltage value to be protected, first switch tube Q1 are connected on firewire between zero curve in second switch Q2, third switching tube Q3 in
4th switching tube Q4 is connected on firewire between zero curve, as first switch tube Q1- second switch Q2 or third switching tube Q3-
When abnormal overcurrent occurs in 4th switching tube Q4, which will be exported relevant voltage by current transformer 40 and trigger driving protection
Module 60, and then the switching signal of drive module is turned off, so that the overcurrent for realizing switch tube is protected, when overcurrent signal relief,
Control of the protective module 60 by releasing to overcurrent drive module is driven, to restore to work normally, thus during rectifying operation,
Or the achievable timely and effectively detection to the higher failure of likelihood ratio during PFC, it is promoted entirely with reaching
The purpose of the safety of pfc circuit.
In addition, those skilled in the art can understand that, the protection signal generated based on the triggering of current transformer 40
It is identical as the protection priority of signal generated based on the triggering of Hall current sensor 50, it is any to be abnormal triggering drive all the way
Dynamic protective module 60, overcurrent reason may be caused 30 crash reset of control module by electromagnetism or surge interference for circuit, or
Short circuit exception etc. occurs for person's reactor.
Wherein, the voltage output signal of current transformer 40 and Hall current sensor 50 is connected to driving protection location,
When driving protection location detects that the voltage signal that current transformer 40 and Hall current sensor 50 export will beyond preset value
It is forced shutdown the first drive module 202 and the second drive module 204, to protect the defencive function realized to four switching tubes.
Wherein current transformer 40 be in order to protect when first switch tube Q1 and second switch Q2 occur short circuit it is abnormal when detection, or
Person third switching tube Q3 and the 4th switching tube Q4 occur short circuit it is abnormal when detection, Hall current sensor 50 is to protect the
Detection or second switch Q2 and third switching tube Q3 when short circuit exception occurs for one switching tube Q1 and the 4th switching tube Q4 are sent out
Detection when raw short circuit exception.
Example IV
As shown in Fig. 2, optionally, the drive module includes for driving described in any of the above-described embodiment
The first drive module 202 of one switching tube Q1 and the third switching tube Q3, and for drive the second switch Q2 with
The second drive module 204 of the 4th switching tube Q4, wherein if the driving protective module 60 is detecting the input inspection
It surveys signal and is greater than the first secure threshold and/or output detection signal greater than the second secure threshold, then trigger the control mould
The driving that block 30 closes first drive module 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 power
The half-bridge driven of factor correcting module.
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.
Embodiment five
The circuit of power factor correction in the application is described below based on synchronous rectification.
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 PN junction between source electrode and drain electrode, the saturation voltage of first switch tube Q1 is (between the drain-source under on-state
Voltage) lower than the positive voltage drop of freewheeling diode.Flowed through in the source drain of first switch tube Q1 as a result, electric current with
It flows through electric current in parasitic diode to compare, voltage drop becomes smaller, or even can reduce conduction losses.It is easy-to-understand to and says, is connecting
Electric current is flowed through in the first switch tube Q1 of state and flows through electricity in the freewheeling diode in the first switch tube Q1 of off-state
Stream is compared, and 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 also suitable.
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 70 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 by current transformer 40 and
Reactor, then by first switch tube Q1 in the 4th switching tube Q4 freewheeling diode rectify to system power supply, at this time due to
Freewheeling diode pressure drop is larger, causes energy waste.
In this embodiment, control module 30 judges to open in the positive half cycle of AC power source according to zero crossing detection module 70 at this time
When the beginning, electric current passes through current transformer 40 and reactor, and output switching signal drives first switch tube Q1 and the 4th switching tube Q4
Conducting, flows through the electric current for flowing through freewheeling diode on first switch tube Q1, Hall current sensor 50 and the 4th switching tube Q4
Metal-oxide-semiconductor bypasses freewheeling diode, to reduce conduction loss using the low on state characteristic of metal-oxide-semiconductor.It is similarly negative in AC power source
When half cycle, control module 30 then controls and opens second switch Q2 and third switching tube Q3, and four metal-oxide-semiconductors is made to realize synchronous rectification
Function, during synchronous rectification, by by the current detecting on current transformer 40 and Hall current sensor 50, inspection
It surveys and whether over-current phenomenon avoidance occurs.
Embodiment six
The circuit of power factor correction in the application is described below based on power factor emendation function.
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 addition, the circuit of power factor correction in the application also has with lower module on the basis of the setting of above-mentioned device:
As shown in Fig. 2, in any of the above-described embodiment, optionally, further includes: bus capacitor E, the bus capacitor
One end is connected to first output end, the other end ground connection of the bus capacitor, and drive module exports the switching signal, leads to
Cross that the AC power source charges to the bus capacitor or bus capacitor electric discharge, drive module do not export the switch and believe
Number, the bus capacitor electric discharge.
In any of the above-described embodiment, optionally, the successive load includes: load drive module 80, is arranged in institute
It states between the first output end and the second output terminal, for receiving the direct current output of the power factor correction module 10, with
To load supplying；The load drive module 80 is additionally coupled to the control module 30, is exported with receiving the control module 30
Inverter control signal.
Specifically, the motor to be set in the compressor of air conditioner is loaded.
In this embodiment, in the application scenarios that load is motor, load drive module 80 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.
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) since current transformer and Hall current sensor directly acquire the input terminal electric current of power factor correction module
With output end current, making power factor correction module, corresponding different current flow paths can be with when executing different feature operations
It is collected by the sensor, and carries out circuit abnormality detection, therefore can more directly detect whether rectifier goes out
It is now abnormal, and when determining that appearance is abnormal, can determine corresponding exceptional part under different operating conditions, relative to existing skill
The scheme of over-current detection is carried out in art using the driving chip combination sampling resistor with defencive function, limitation is smaller, and
More there is specific aim and practicability.
(2) by setting two the first reactors and the second reactor in parallel, 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.
(3) sampling resistor in the prior art is replaced to carry out sampling operation using Hall current sensor, on the one hand, can
It is not influenced by size of current, on the other hand, different half cycles is in based on AC power source, there is different current flow paths, no
Correspond to different switching tube combinations with current flow path, thus compared with the existing technology for, the detection range of application is wider.
(4) electric current will export relevant voltage by current transformer and/or Hall current sensor and trigger driving protection
Module, and then the switching signal of drive module is turned off, to protect the overcurrent for realizing switch tube, when overcurrent signal relief, drive
Dynamic protective module will release control to overcurrent drive module, to restore to work normally, thus during rectifying operation or function
The timely and effectively detection to the higher failure of likelihood ratio can be achieved during rate factor correcting, promote entire PFC to reach
The purpose of the safety of circuit.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, according to the technical solution of the present invention, due to electric current
Mutual inductor and Hall current sensor directly acquire the input terminal electric current and output end current of power factor correction module, make power
Factor correcting module corresponding different current flow paths when executing different feature operations can be acquired by the sensor
It arrives, and carries out circuit abnormality detection, therefore can more directly detect whether rectifier exception occurs, and determining
When now abnormal, corresponding exceptional part can determine under different operating conditions, it is middle using with protection function compared with the existing technology
The driving chip combination sampling resistor of energy carries out the scheme of over-current detection, and limitation is smaller, and more has specific aim and reality
The property used.
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 power supply signal, and the power factor correction module includes switching tube, the switching tube quilt
It is configured to control the power supply signal to load supplying；
Drive module is connected to the driving input terminal of the switching tube, switchs for exporting to the power factor correction module
Signal；
Control module is connected to the drive module, opens the output switching signal or pass for controlling the drive module
Close the output switching signal；
Current transformer is set to the input side of the power factor correction module, inputs detection signal with acquisition；
Hall current inductor is set to the outlet side of the power factor correction module, exports detection signal with acquisition；
Protective module is driven, connect, is used for the control module, the current transformer and the Hall current inductor
According to the testing result of the input detection signal and/or the output detection signal, it is determined whether Xiang Suoshu control module is defeated
Signal is protected out, and the protection signal is used to trigger the driving output that the control module closes the drive module.
2. circuit of power factor correction according to claim 1, which is characterized in that further include:
First reactor and the second reactor, first reactor are set to the firewire of AC power source, second reactor
It is set on the zero curve of the AC power source；
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: stating alternating current according to the zero passage detection signal determination that the zero crossing detection module exports
The phase state in source, to export corresponding switch control signal to the drive module according to the phase state,
Wherein, for the AC power source for exporting the power supply signal, the current transformer is set to the AC power source
Between zero line and first reactor, or it is set between the zero line side of the AC power source and second reactor.
3. circuit of power factor correction according to claim 2, 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 output by pipe
First output end of side by the source series of the source electrode of the third switching tube and the 4th switching tube, and tie point is determined as
The second output terminal of the outlet side, by the drain series of the source electrode of the first switch tube and the third switching tube, and will
Tie point is connected to the zero line, by the drain series of the source electrode of the second switch and the 4th switching tube, and will
Tie point is connected to the zero line side.
4. circuit of power factor correction according to claim 3, which is characterized in that
After the Hall current sensor is set to the first output end and the circuit of power factor correction of the outlet side
Between grade load.
5. circuit of power factor correction according to claim 3, which is characterized in that
The Hall current sensor is set between the first output end of the outlet side and ground terminal.
6. circuit of power factor correction according to claim 3, 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 is detecting that input detection signal is greater than the first secure threshold and/or described
Output detection signal is greater than the second secure threshold, then triggers the control module and close first drive module and described second
The driving of drive module exports.
7. circuit of power factor correction according to claim 3, 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 3, 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 3 to 8, which is characterized in that further include:
Bus capacitor, one end of the bus capacitor are connected to first 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. circuit of power factor correction according to claim 4, which is characterized in that the successive load includes:
Load drive module, be arranged between first output end and the second output terminal, for receive the power because
The direct current output of number correction module, to load supplying；
The load drive module is additionally coupled to the control module, to receive the inversion control letter of the control module output
Number.
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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910413442.1A CN110034671A (en) | 2019-05-17 | 2019-05-17 | Circuit of power factor correction and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910413442.1A CN110034671A (en) | 2019-05-17 | 2019-05-17 | Circuit of power factor correction and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110034671A true CN110034671A (en) | 2019-07-19 |
Family
ID=67242551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910413442.1A Pending CN110034671A (en) | 2019-05-17 | 2019-05-17 | Circuit of power factor correction and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110034671A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111404367A (en) * | 2020-04-17 | 2020-07-10 | 广东美的制冷设备有限公司 | PFC circuit, circuit board 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 |
| EP4304032A1 (en) * | 2022-07-07 | 2024-01-10 | Delta Electronics (Thailand) Public Co., Ltd. | Totem pole pfc with a surge protection circuit and surge protection method for a totem pole pfc |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070228834A1 (en) * | 2006-03-28 | 2007-10-04 | Fujitsu Limited | Uninterruptible power supply apparatus |
| CN101682267A (en) * | 2007-06-04 | 2010-03-24 | 松下电器产业株式会社 | Electric power source control device and heat pump device using the electric power source control device |
| CN102520232A (en) * | 2009-11-26 | 2012-06-27 | 华为技术有限公司 | Current sampling device |
| CN104617544A (en) * | 2014-04-02 | 2015-05-13 | 美的集团股份有限公司 | Air-conditioner and compressor protection circuit thereof |
| CN106411117A (en) * | 2016-11-17 | 2017-02-15 | 广州视源电子科技股份有限公司 | Active power factor correction circuit and starting method thereof |
| JP2017070193A (en) * | 2015-09-30 | 2017-04-06 | 浙江大学 | Bidirectional ac/dc converter |
| CN107546991A (en) * | 2016-06-28 | 2018-01-05 | 日立江森自控空调有限公司 | Power-converting device and the air conditioner for possessing power-converting device |
| CN210007619U (en) * | 2019-05-17 | 2020-01-31 | 广东美的制冷设备有限公司 | Power factor correction circuit and air conditioner |
-
2019
- 2019-05-17 CN CN201910413442.1A patent/CN110034671A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070228834A1 (en) * | 2006-03-28 | 2007-10-04 | Fujitsu Limited | Uninterruptible power supply apparatus |
| CN101682267A (en) * | 2007-06-04 | 2010-03-24 | 松下电器产业株式会社 | Electric power source control device and heat pump device using the electric power source control device |
| CN102520232A (en) * | 2009-11-26 | 2012-06-27 | 华为技术有限公司 | Current sampling device |
| CN104617544A (en) * | 2014-04-02 | 2015-05-13 | 美的集团股份有限公司 | Air-conditioner and compressor protection circuit thereof |
| JP2017070193A (en) * | 2015-09-30 | 2017-04-06 | 浙江大学 | Bidirectional ac/dc converter |
| CN107546991A (en) * | 2016-06-28 | 2018-01-05 | 日立江森自控空调有限公司 | Power-converting device and the air conditioner for possessing power-converting device |
| CN106411117A (en) * | 2016-11-17 | 2017-02-15 | 广州视源电子科技股份有限公司 | Active power factor correction circuit and starting method thereof |
| CN210007619U (en) * | 2019-05-17 | 2020-01-31 | 广东美的制冷设备有限公司 | Power factor correction circuit and air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111404367A (en) * | 2020-04-17 | 2020-07-10 | 广东美的制冷设备有限公司 | PFC circuit, circuit board and air conditioner |
| EP4304032A1 (en) * | 2022-07-07 | 2024-01-10 | Delta Electronics (Thailand) Public Co., Ltd. | Totem pole pfc with a surge protection circuit and surge protection method for a totem pole pfc |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209545434U (en) | Circuit of power factor correction and air conditioner | |
| CN110011531A (en) | Circuit of power factor correction and air conditioner | |
| CN110011530A (en) | Circuit of power factor correction and air conditioner | |
| CN109980915A (en) | Circuit of power factor correction and air conditioner | |
| CN110034671A (en) | Circuit of power factor correction and air conditioner | |
| CN104113200B (en) | For convertible frequency air-conditioner without bridge APFC systems and its control method | |
| CN107276388B (en) | PFC circuit and variable frequency air conditioner | |
| CN102721915B (en) | Method for UPS power circuit fault detection | |
| WO2020232993A1 (en) | Power factor correction circuit and air conditioner | |
| CN104034981A (en) | Self-circulation aging test system and test method for frequency converter | |
| CN105449806B (en) | The charging system of electric vehicle | |
| CN109980914A (en) | Circuit of power factor correction and air conditioner | |
| CN105375435B (en) | Electricity and the Self-power protective device and system of tripping are taken based on three-phase current sensing | |
| CN102231510B (en) | Pulsating DC (direct current) aftercurrent protector and running method thereof | |
| CN107888059A (en) | A kind of surge restraint circuit and Surge suppression method | |
| WO2020232995A1 (en) | Power factor correction circuit and air conditioner | |
| CN102545578B (en) | Single-phase half-bridge voltage-multiplying rectification PFC (power factor correction) circuit | |
| CN105634025A (en) | Grid-connected inversion device in direct current microgrid | |
| CN105826909A (en) | Charging circuit for converters, converter, and air conditioner | |
| CN202475293U (en) | Three-phase voltage pulse width modulation rectifier | |
| CN103487706B (en) | Based on the cascade connection type combining inverter cell failure detection method that pulse voltage compares | |
| CN105305483A (en) | Inverter grid connected type power source impedance measurement model optimization method under the condition of external disturbance signals | |
| CN210007620U (en) | Power factor correction circuit and air conditioner | |
| CN209545435U (en) | Circuit of power factor correction and air conditioner | |
| CN203691263U (en) | Direct-current power supply device, motor driving device, air conditioning device, refrigerator and heat pump type hot water supplying device |
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 |