CN107276388A - Pfc circuit and transducer air conditioning - Google Patents
Pfc circuit and transducer air conditioning Download PDFInfo
- Publication number
- CN107276388A CN107276388A CN201710535265.5A CN201710535265A CN107276388A CN 107276388 A CN107276388 A CN 107276388A CN 201710535265 A CN201710535265 A CN 201710535265A CN 107276388 A CN107276388 A CN 107276388A
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- module
- switch module
- electric capacity
- switch
- rectification
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4283—Arrangements for improving power factor of AC input by adding a controlled rectifier in parallel to a first rectifier feeding a smoothing capacitor
-
- 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)
- Rectifiers (AREA)
Abstract
The invention provides a kind of pfc circuit and transducer air conditioning, by increasing first switch module and second switch module in PFC electric currents, first switch block coupled in series is in the ac circuit by being constituted including reactor, rectification module, the ac input end of power factor correction module is in parallel with the ac input end of rectification module, second switch module one end is connected in above-mentioned ac circuit, and other end is connected to the common contact of two electric capacity in the filter circuit that the first electric capacity and the second electric capacity are constituted.The pfc circuit of the present invention realizes the switching that current rectifying and wave filtering circuit in pfc circuit is operated in full-bridge rectification module and voltage multiplying rectifier pattern by second switch module, and pfc circuit remains to realize high conversion efficiency during realizing that load is in low power run.
Description
Technical field
The present invention relates to PFC control fields, more particularly to a kind of pfc circuit and transducer air conditioning.
Background technology
The driving frequency-changeable compressor or the PFC of direct current generator being currently used under low-voltage such as 100VAC supply voltages
(Power Factor Correction, Active PFC) circuit generally using power supply is exported again after voltage multiplying rectifier, due to again
There is the problem of conversion efficiency is relatively low in pressure rectifier system, therefore cause electric energy when loaded work piece under low-power operation state
Waste.
The content of the invention
It is a primary object of the present invention to provide a kind of pfc circuit and transducer air conditioning, it is therefore intended that solve existing PFC
Circuit is operated in the problem of conversion efficiency is relatively low under voltage multiplying rectifier mode.
To achieve the above object, a kind of pfc circuit for providing of the present invention, including it is reactor, power factor correction module, whole
Flow module, first switch module, second switch module, the first electric capacity, the second electric capacity and drive module；
The reactor connects the input of AC power, the reactor, the rectification module and the first switch
Block coupled in series is in ac power supply circuit；
The control end of the first switch module connects the controller, and the controller controls the first switch module
Break-make, to control the break-make of the ac input circuit；
The output end of the rectification module is connected in parallel on after first electric capacity and the second electric capacity series connection；
The drive module is connected in parallel on the output end of the rectification module, and the AC power is through the rectification module rectification
Direct current is exported, to provide power supply for drive module work, the drive module control end connects the controller, described
Controller controls the drive module to be run with driving load；
The ac input end of the power factor correction module is in parallel with the ac input end of the rectification module, the work(
Rate factor correction module control end connects the controller, and the power factor correction module is carried out under controller control
Switch switching, Active PFC is carried out with the DC voltage and DC current that are exported to the rectification module；
One end of the second switch module connects the ac circuit, and the second switch module other end connection is described
The common contact of first electric capacity and the second electric capacity, the control end of the second switch module connects the controller, the controller
The break-make of the second switch module is controlled, to control described to be made up of rectification module and first electric capacity and the second electric capacity
Current rectifying and wave filtering circuit realizes full-bridge rectification pattern and voltage multiplying rectifier pattern switching.
It is preferred that, described first switch module one end and one end of the second switch module are connected to the AC power altogether
Zero line input, the other end of the second switch module connects the common contact of first electric capacity and the second electric capacity, and described the
The one switch module other end connects the common contact of an ac input end of the power factor correction module and the rectification module.
It is preferred that, one end of the second switch module connects the AC power zero line input, the second switch
The other end of module connects the common contact of first electric capacity and the second electric capacity；
One end of the first switch module connects the AC power live wire input, and the first switch module is another
End connects the common contact of an ac input end of the power factor correction module and the rectification module.
It is preferred that, one end of the second switch module connects the AC power live wire input, the second switch
The other end of module connects the common contact of first electric capacity and the second electric capacity；
One end of the first switch module connects the AC power zero line input, and the first switch module is another
End connects the common contact of an ac input end of the power factor correction module and the rectification module.
It is preferred that, one end of the first switch module connects the AC power live wire input, the first switch
One end connection, the ac input end of the power factor correction module one and the rectification of the module other end, the second switch module
One ac input end of module connects altogether, other end connection first electric capacity of the second switch module and being total to for the second electric capacity
Contact.
It is preferred that, in addition to current detection module,
The current detection module is series at the ac circuit, and the output end of the current detection module connects the control
Device processed, to detect the AC current values of the AC power input.
It is preferred that, in addition to zero passage detection module,
The zero passage detection wired in parallel connects institute in the ac power input end, the zero passage detection module output end
Controller is stated, to detect the voltage zero-crossing signal of the AC power, the controller is controlled according to the voltage zero-crossing signal
The on off state of the power factor correction module is switched over.
It is preferred that, when the load is compressor, the controller is additionally operable to：
Judge the frequency of current control compressor operating, when the running frequency is more than preset value, the controller control
The second switch module conducting is made, to control the current rectifying and wave filtering circuit to be operated in voltage multiplying rectifier pattern；When the operation frequency
When rate is less than the preset value, the controller controls the second switch module to disconnect, to control the current rectifying and wave filtering circuit
It is operated in full-bridge rectification pattern.
It is preferred that, the power factor correction module includes rectification unit, switch element and driver element；
Two inputs of the rectification unit are described two ac input ends of power factor correction module, the rectification
Two output ends of unit are in parallel with the switch element；
The control end of the switch element connects the driver element, and the input of the driver element is linked as the power
Factor correction circuit control end.
To achieve the above object, the present invention also provides a kind of transducer air conditioning, and the transducer air conditioning includes described work(
Rate factor correction circuit.
The pfc circuit that the present invention is provided, by increasing first switch module and second switch module in PFC electric currents, the
One switch module is connected in the ac circuit by being constituted including reactor, rectification module, the exchange of power factor correction module
Input is in parallel with the ac input end of rectification module, and second switch module one end is connected in above-mentioned ac circuit, and in addition one
End is connected to the common contact of two electric capacity in the filter circuit that the first electric capacity and the second electric capacity are constituted.The pfc circuit of the present invention leads to
Cross second switch module and realize current rectifying and wave filtering circuit in pfc circuit and be operated in cutting for full-bridge rectification module and voltage multiplying rectifier pattern
Change, pfc circuit is remained to realize high conversion efficiency during realizing that load is in low power run, and first switch module is realized
Pfc circuit can disconnect the power supply of whole PFC and load when there is operation irregularity protection, realize the safety guarantor of whole pfc circuit
Shield.
Brief description of the drawings
Fig. 1 is the electrical block diagram of pfc circuit first embodiment of the present invention；
Fig. 2 is to be operated in current loop schematic diagram under voltage multiplying rectifier pattern in first embodiment；
Fig. 3 is to be operated in current loop schematic diagram under voltage multiplying rectifier pattern in first embodiment；
Fig. 4 is the electrical block diagram of pfc circuit second embodiment of the present invention；
Fig. 5 is the electrical block diagram of pfc circuit 3rd embodiment of the present invention；
Fig. 6 is to be operated in current loop schematic diagram under voltage multiplying rectifier pattern in 3rd embodiment；
Fig. 7 is to be operated in current loop schematic diagram under voltage multiplying rectifier pattern in 3rd embodiment；
Fig. 8 is the electrical block diagram of pfc circuit fourth embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Reference picture 1, the pfc circuit structure chart that Fig. 1 provides for first embodiment of the invention, for convenience of description, only shows
The part related to the embodiment of the present invention, details are as follows：
Pfc circuit provided in an embodiment of the present invention includes reactor L, power factor correction module 10, rectification module 40, the
One switch module 20, second switch module 30, the first electric capacity E1, the second electric capacity E2, controller 60 and drive module 50；
The input of reactor L connection AC powers, reactor L, rectification module 40 and first switch module 20 are connected on
In ac power supply circuit；
The control end connection controller 60 of first switch module 20, the break-make of the control first switch of controller 60 module 20,
To control the break-make of ac input circuit；
The output end of rectification module 40 is connected in parallel on after first electric capacity E1 and the second electric capacity E2 series connection；
Drive module 50 is connected in parallel on the output end of rectification module 40, the rectified rectification of the module 40 output direct current of AC power
Electricity, to provide power supply, the control end of drive module 50 connection controller 60, the control driving mould of controller 60 for the work of drive module 50
Block 50 is run with driving load；
The ac input end of power factor correction module 10 is in parallel with the ac input end of rectification module 40；Active PFC mould
Block 10 and reactor L constitutes pfc circuit, the control end of power factor correction module 10 connection controller 60, Active PFC mould
Block 10 carries out switch switching under the control of controller 60, and work(is carried out with the DC voltage and DC current that are exported to rectification module 40
Rate factor correction；
Second switch module 30 one end connection ac circuit, the other end of second switch module 30 connect the first electric capacity E1 and
Second electric capacity E2 common contact, the control end connection controller 60 of second switch module 30, the control second switch mould of controller 60
The break-make of block 30, to control to constitute current rectifying and wave filtering circuit realization entirely by the electric capacity E1 of rectification module 40 and first and the second electric capacity E2
Bridge rectification mode and voltage multiplying rectifier pattern switching.
Specifically, first switch module 20 includes the switch of switch K1 and driving switch K1 switch drive unit 1 here
K1 is generally relay, and switch drive unit 1 is to drive the drive circuit that the circuit of relay is constituted if any triode accordingly,
The controlled stage of triode is that base stage is the control end of first switch module 20, and the switch ends of relay are first switch module 20
Two ends, controller 60 is that a MCU control port passes through the logical of the controlling switch K1 of switch drive unit 1 by output signal
It is disconnected.Here because the switch drive unit 1 of relay and driving relay is prior art, its physical circuit is not being repeated.
With first switch module 20, the circuit structure of second switch module 30 is also same, and second switch module 30 is wrapped
Switch K2 and driving switch K2 switch drive unit 2 is included, a control port output control signal of controller 60 is by opening
Close the controlling switch K2 of driver element 2 break-make.
Power factor correction module 10 includes rectification unit 11, switch element 12 and driver element 13；
Two inputs of rectification unit 11 are two ac input ends of power factor correction module, the two of rectification unit 11
Individual output end is in parallel with switch element 12；
The control end connection driver element 13 of switch element 12, the input of driver element 13 is linked as pfc circuit control end.
Here rectification unit 11 includes full-bridge rectification module BR1, realizes to the AC rectification of input into direct current, switchs
Unit is included by opening that IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) is constituted
It is the drive circuit that driving switch pipe Q1 works to close pipe Q1, PFC driver element 12, and the control end of PFC driver elements 12 is connected to
Controller 60, the switch by the controlling switch pipe Q1 of PFC driver elements 12 of controller 60 switches, and power factor (PF) school is controlled with this
The work of positive module 10.
Rectification module 40 with the rectification unit 11 of power factor correction module 10 circuit structure, also by including full-bridge rectification
Module BR2 is constituted, and is realized to the AC rectification of input into direct current.
In the present embodiment, the one end of first switch module 20 and one end of second switch module 30 are connected to AC power zero altogether
Line input, the other end of second switch module 30 connects the first electric capacity E1 and the second electric capacity E2 common contact, first switch mould
The other end of block 20 connects the common contact of an ac input end of power factor correction module 10 and rectification module 40.
The pfc circuit of the present embodiment also includes current detection module 70, and two test sides of current detection module 70 are connected
In ac circuit, the output end connection controller 60 of current detection module 70, to detect the AC current values of AC power input.
Current detection module 70 including current transformer T1 and additional detection circuit by constituting, the output end of current detection module 70 and control
Device 60 is connected, and controller can obtain the ac circuit current value detected.The physical circuit of current detection module 70 refers to existing
There is technology, will not be repeated here.
The pfc circuit of the present embodiment also includes zero passage detection module 80, and zero passage detection module 80 is used to detect AC power
Voltage zero-crossing signal, controller 60 cuts according to voltage zero-crossing signal to the on off state of power factor correction module 10
Change.The physical circuit of zero passage detection module 80 refers to prior art, will not be repeated here.
Circuit operation principle shown in the present embodiment is as follows：When the K1 closures of first switch module 20, second switch module
When 30 K2 disconnects, it is operated in entirely by the electric capacity E1 of rectification module 40 and first and the second electric capacity E2 current rectifying and wave filtering circuit constituted
Bridge rectification mode.Now the live wire of AC power is L lines through the first protective tube FUSE1, differential mode filter inductance L2, current transformer
T1, reactor L are carried in a full-bridge rectification module BR2 ac input end.The live wire of AC power is L lines through differential mode filtered electrical
Feel L2, when the K1 of first switch module 20 is carried in full-bridge rectification module BR2 another ac input end.AC power is through full-bridge
Direct current is exported after rectification module BR2 rectifications, after the filter circuit to be formed filtering of being connected via the first electric capacity E1, the second electric capacity E2
Galvanic current is obtained to be carried in drive module 50, therefore now rectification module BR2 is operated in full-bridge rectification pattern.Together
When, the pfc circuit being made up of full-bridge rectification module BR1, switching tube Q1, PFC driver element 12 and reactor L in controller 60 i.e.
Under MCU control carry out PFC correction works, because pfc circuit is to be connected on AC, thus AC signal need it is whole by full-bridge
Flow module BR1 be rectified into direct current be carried in IGBT switching tubes Q1 source class and drain electrode two ends, grid through PFC driver elements by
MCU output switch pulse signals are controlled.When switching tube Q1 is turned on, AC power is through reactor L, full-bridge rectification module
The BR1 and switching tube Q1 and K1 of first switch module 20 constitutes loop, and reactor L storage energies are electric when switching tube Q1 disconnects
Induced electromotive force is produced on anti-device L, the sense of current that its corresponding electric current flows through reactor L is consistent with before switching tube Q1 disconnections,
Now the corresponding electric current of induced electromotive force charges through full-bridge rectification module BR2 to the first electric capacity E1, the second electric capacity E2, is realized with this
PFC corrections.
When the K1 of first switch module 20 is closed, during the K2 closures of second switch module 30, by rectification module 40 and first
The arrangement filter circuit of electric capacity E1 and the second electric capacity E2 compositions is operated in voltage multiplying rectifier pattern.As shown in Fig. 2 working as AC power
Alternating current from L lines when, as shown in broken lines, alternating current is through reactor L, full-bridge rectification module BR2, first
Electric capacity E1, switch K2 return to the N lines of alternating current；As shown in figure 3, when the alternating current of AC power is from N lines, in such as figure
Dotted line shown in, alternating current returns to alternating current from L through switching K2, the second electric capacity E2, full-bridge rectification module BR2, reactor L
Line.Due to alternating current from L and N lines when the first electric capacity E1 and the second electric capacity E2 are charged respectively, therefore be carried in first
The voltage at two ends is twice of AC charging voltage after electric capacity E1 and the second electric capacity E2 series connection, i.e., be now operated in voltage multiplying rectifier mould
Formula.Meanwhile, essentially identical, i.e., its current loop when switching tube Q1 is turned under the work of pfc circuit disconnects with above-mentioned switch K2
It is same as described above, and the corresponding sense of current of induced electromotive force and switching tube Q1 are produced when switching tube Q1 disconnects, on reactor L
It is consistent before disconnecting, now electric current respectively as in Fig. 2 and Fig. 3 dotted line direction the first electric capacity E1 or the second electric capacity E2 is charged, with this
Realize PFC corrections.
Pfc circuit shown in the present embodiment, its second switch module 30, which is served, realizes full-bridge rectification pattern and times repoussage
The switching of stream mode, and first switch module 20 is due to being connected in ac circuit, therefore when first switch module 20 disconnects,
Ac circuit disconnects, because rectification module 40 and power factor correction module 10 are connected in this loop, when ac circuit is disconnected
When opening, the power supply to the two modules is also disconnected, it is achieved thereby that whole pfc circuit and driving mould to the rear class of rectification module 20
Block 50 and the power supply of load.In a particular application, load includes compressor or motor, and drive module 50 corresponds to driving compression
The drive circuit of machine or motor, compressor or motor here are permagnetic synchronous motor, and drive module 50 includes IPM modules
(Intelligent Power Module, SPM), under the control of controller 60, realization will be carried in IPM modules
On DC inverter realize driving to compressor or motor into alternating current.The pfc circuit of the present embodiment operationally, by
What it is in pfc circuit input is alternating current, it is therefore desirable to ensure to maintain electric current when switching tube Q1 works, to realize to reactor
L energy storage, thus controller needs the zero cross signal by zero detection module 80 detection alternating current, just control is opened after zero passage
Pipe Q1 is closed to open to ensure that switching tube Q1 can realize the energy storage to reactor L by lasting electric current.And pfc circuit is in work
During, controller 60 also needs to obtain the operating current of current circuit by current detection module 70, if it find that load
Operating current is too high, when causing the operating current of pfc circuit too high, and controller 60 needs controlling switch pipe Q1 working frequency to drop
It is low, to reduce operating current, and when detecting operating current over-limit condition, it is necessary to by controlling first switch module 20 to break
Open, disconnect whole pfc circuit and load, to realize the safeguard protection of pfc circuit and load.Because first switch module 20 disconnects
When whole pfc circuit and load all power off, and control module 60 stills need working power, it is therefore desirable to increase a dc source
Control module 60 is powered, as shown in fig. 1.
Current rectifying and wave filtering circuit shown in the present embodiment is suitable for when the exchange of input when being operated under voltage multiplying rectifier pattern
When the alternating current of low voltage such as input is 100V, the DC voltage of output can be lifted by voltage multiplying rectifier, to load as pressure
, can be with respect to the direct current reduction half exported under full-bridge mode when compressor operating is under high power environment exemplified by contracting machine
The operating current of reduction load causes loaded work piece safer while the conversion efficiency of PFC module is also higher, and in low-power
When under load, if compressor operating is under low frequency state, when being such as less than preset value 20Hz with the working frequency of compressor, now
The operating current of circuit is low, and the pfc circuit conversion efficiency under voltage multiplying rectifier pattern is low, the now control of controller 60 second switch mould
Block 30 disconnects, and allows current rectifying and wave filtering circuit when being operated under full-bridge rectification pattern, now pfc circuit conversion efficiency is improved, although this
When operating current improved with respect under voltage multiplying rectifier pattern, but because the working frequency of compressor is low, its working current value still exists
In safe range.Therefore for the wide load such as frequency-changeable compressor of current margin, now controller needs to obtain current pressure
The frequency of contracting machine, if the frequency of compressor less than preset value be current compressor operating current it is relatively low if control second switch mould
Block 30 disconnects to allow current rectifying and wave filtering circuit to be operated in full-bridge rectification pattern improving pfc circuit conversion efficiency；If compressor
Frequency is that then control second switch module 30 is turned on to make rectifying and wave-filtering electric the increase of current compressor operating current more than preset value
The supply current that road is operated in voltage multiplying rectifier pattern to reduce load causes overcurrent protection incessantly so that loaded work piece is safer.
Pfc circuit provided in an embodiment of the present invention, by increasing first switch module 20 and second switch in PFC electric currents
Module 30, first switch module 20 is connected in the ac circuit by being constituted including reactor L, rectification module 40, power factor (PF)
The ac input end of correction module 10 is in parallel with the ac input end of rectification module 40, and the one end of second switch module 30 is connected to
State in ac circuit, other end is connected in the filter circuit that the first electric capacity E1 and the second electric capacity E2 are constituted being total to for two electric capacity
Contact.The pfc circuit of the embodiment of the present invention realizes current rectifying and wave filtering circuit in pfc circuit by second switch module 30 and is operated in
The switching of full-bridge rectification module and voltage multiplying rectifier pattern, with realize when loaded work piece in a low-power state when, pfc circuit is remained to
High-conversion rate is realized, and first switch module 30 is realized when operation irregularity protection occurs in pfc circuit can disconnect whole pfc circuit
Power supply, realize the safeguard protection of whole pfc circuit.
Further, based on pfc circuit first embodiment of the present invention, pfc circuit such as Fig. 4 institutes of second embodiment of the invention
Show, it is different from the circuit connecting mode that first embodiment is a difference in that first switch module 20 and second switch module 30.
One end connection AC power zero line input of second switch module 30, the other end connection of second switch module 30
First electric capacity E1 and the second electric capacity E2 common contact；
One end connection AC power live wire input of first switch module 20, the other end of first switch module 20 connection work(
The common contact of one ac input end of rate factor correction module 10 and rectification module 40.
In the present embodiment, first switch module 20 is changed to be connected in parallel on the live wire i.e. L line ends of nearly AC power, is specifically simultaneously
It is associated between reactor L and an ac input end of rectification module, because first switch module 20 is still to be connected on to exchange back
Lu Zhong, so when first switch module disconnects, that is, being disconnected the power supply to whole pfc circuit.The company of second switch module 30
Connect relation identical with first embodiment.
The first switch module 20 of the present embodiment and the operation principle of second switch module 30 are identical with first embodiment,
This is repeated no more.
Further, based on pfc circuit first embodiment of the present invention, pfc circuit such as Fig. 5 institutes of third embodiment of the invention
Show, it is different from the circuit connecting mode that first embodiment is a difference in that first switch module 20 and second switch module 30.
One end connection AC power live wire input of second switch module 30, the other end connection of second switch module 30
First electric capacity E1 and the second electric capacity E2 common contact；
One end connection AC power zero line input of first switch module 20, the other end of first switch module 20 connection work(
The common contact of one ac input end of rate factor correction module 10 and rectification module 40.
In the present embodiment, second switch module 30 is changed to be connected in parallel on the live wire i.e. L line ends of nearly AC power, is specifically it
One end shunt reactor L, other end connected mode is identical with first embodiment.
In the present embodiment, when the K1 of first switch module 20 is closed, when the K2 of second switch module 30 disconnects, by rectification mould
The current rectifying and wave filtering circuit of the electric capacity E1 of block 40 and first and the second electric capacity E2 compositions is operated in full-bridge rectification pattern, its operation principle
It is identical with first embodiment, it will not be repeated here.
When the K1 of first switch module 20 is closed, during the K2 closures of second switch module 30, by rectification module 40 and first
The arrangement filter circuit of electric capacity E1 and the second electric capacity E2 compositions is operated in voltage multiplying rectifier pattern.As shown in fig. 6, working as AC power
Alternating current from N lines when, as shown in broken lines, alternating current through switch K1, full-bridge rectification module BR2, first
Electric capacity E1, switch K2, reactor L return to alternating current from L lines；As shown in fig. 7, when the alternating current of AC power goes out from L lines
During hair, as shown in broken lines, alternating current is returned to through reactor L, switch K2, the second electric capacity E2, full-bridge rectification module BR2
The N lines of alternating current.Therefore alternating current from L and N lines when the second electric capacity E2 and the first electric capacity E1 are charged respectively, with respect to the
The simply charge circuit of one embodiment is different, equally realizes voltage multiplying rectifier.And the working method of pfc circuit is implemented with first
Example, produces the corresponding sense of current of induced electromotive force when switching tube Q1 disconnects, on reactor L and switching tube Q1 disconnections are previous
Cause, now electric current respectively as in Fig. 6 and Fig. 7 dotted line direction the first electric capacity E1 or the second electric capacity E2 is charged, PFC is realized with this
Correction.
The operation principle of other modules of the present embodiment is identical with first embodiment, will not be repeated here.
Further, based on pfc circuit first embodiment of the present invention, pfc circuit such as Fig. 8 institutes of fourth embodiment of the invention
Show, it is different from the circuit connecting mode that first embodiment is a difference in that first switch module 20 and second switch module 30.
One end connection AC power live wire input of first switch module 20, the other end of first switch module 20, second
One end connection of switch module 30, an ac input end of the ac input end of power factor correction module 10 1 and rectification module 40
Connect altogether, the other end of second switch module 30 connects the first electric capacity E1 and the second electric capacity E2 common contact.
In the present embodiment, first switch module 20 and second switch module 30 are changed to be connected on the live wire of nearly AC power
That is L line ends, specifically first switch module 20 is connected between reactor L and an ac input end of rectification module, and second opens
Close the one end of module 30 in parallel with one end of another and rectification module 40 of the first switch module 20 away from reactor L.
In the present embodiment, pfc circuit is operated in full-bridge rectification and the same 3rd embodiment of voltage multiplying rectifier working method, other moulds
The same first embodiment of working method of block, will not be repeated here.
The present invention also provides a kind of transducer air conditioning, by indoor set, outdoor unit into wherein outdoor unit compresses including frequency conversion
Machine, outdoor unit control circuit includes above-mentioned pfc circuit, and its specific embodiment refers to above-described embodiment, herein no longer
Repeat.
In the description of this specification, the description meaning of reference term " first embodiment ", " second embodiment ", " example " etc.
Refer to reference to specific method, device or the feature that the embodiment or example are described be contained in the present invention at least one embodiment or
In example.In this manual, identical embodiment or example are necessarily directed to the schematic representation of above-mentioned term.And
And, specific features, method, device or the feature of description can be in any one or more embodiments or example with suitable side
Formula is combined.In addition, in the case of not conflicting, those skilled in the art can be real by the difference described in this specification
The feature for applying example or example and non-be the same as Example or example is combined and combined.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of power factor correction circuit, it is characterised in that including reactor, power factor correction module, rectification module,
One switch module, second switch module, the first electric capacity, the second electric capacity, controller and drive module；
The reactor connects the input of AC power, the reactor, the rectification module and the first switch module
It is connected in ac power supply circuit；
The control end of the first switch module connects the controller, and the controller controls the logical of the first switch module
It is disconnected, to control the break-make of the ac input circuit；
The output end of the rectification module is connected in parallel on after first electric capacity and the second electric capacity series connection；
The drive module is connected in parallel on the output end of the rectification module, and the AC power is exported through the rectification module rectification
Direct current, to provide power supply for drive module work, the drive module control end connects the controller, the control
Device controls the drive module to be run with driving load；
The ac input end of the power factor correction module is in parallel with the ac input end of the rectification module, the power because
Plain correction module control end connects the controller, and the power factor correction module is switched under controller control
Switching, Active PFC is carried out with the DC voltage and DC current that are exported to the rectification module；
One end of the second switch module connects the ac circuit, the second switch module other end connection described first
The common contact of electric capacity and the second electric capacity, the control end of the second switch module connects the controller, the controller control
The break-make of the second switch module, to control described to constitute rectification by rectification module and first electric capacity and the second electric capacity
Filter circuit realizes full-bridge rectification pattern and voltage multiplying rectifier pattern switching.
2. power factor correction circuit as claimed in claim 1, it is characterised in that
Described first switch module one end and one end of the second switch module are connected to the AC power zero line input altogether,
The other end of the second switch module connects the common contact of first electric capacity and the second electric capacity, and the first switch module is another
One end connects the common contact of an ac input end of the power factor correction module and the rectification module.
3. power factor correction circuit as claimed in claim 1, it is characterised in that
One end of the second switch module connects the AC power zero line input, the other end of the second switch module
Connect the common contact of first electric capacity and the second electric capacity；
One end of the first switch module connects the AC power live wire input, and the first switch module other end connects
Connect the common contact of an ac input end of the power factor correction module and the rectification module.
4. power factor correction circuit as claimed in claim 1, it is characterised in that
One end of the second switch module connects the AC power live wire input, the other end of the second switch module
Connect the common contact of first electric capacity and the second electric capacity；
One end of the first switch module connects the AC power zero line input, and the first switch module other end connects
Connect the common contact of an ac input end of the power factor correction module and the rectification module.
5. power factor correction circuit as claimed in claim 1, it is characterised in that
One end connection AC power live wire input of the first switch module, the first switch module other end,
One end connection of the second switch module, the ac input end of the power factor correction module one are exchanged with the one of rectification module
Input connects altogether, and the other end of the second switch module connects the common contact of first electric capacity and the second electric capacity.
6. power factor correction circuit as claimed in claim 1, it is characterised in that also including current detection module,
The current detection module is series at the ac circuit, and the output end of the current detection module connects the control
Device, to detect the AC current values of the AC power input.
7. power factor correction circuit as claimed in claim 1, it is characterised in that also including zero passage detection module,
The zero passage detection wired in parallel connects the control in the ac power input end, the zero passage detection module output end
Device processed, to detect the voltage zero-crossing signal of the AC power, the controller is according to being controlled the voltage zero-crossing signal
The on off state of power factor correction module is switched over.
8. power factor correction circuit as claimed in claim 1, it is characterised in that
When the load is compressor, the controller is additionally operable to：
Judge the frequency of current control compressor operating, when the running frequency is more than preset value, the controller controls institute
The conducting of second switch module is stated, to control the current rectifying and wave filtering circuit to be operated in voltage multiplying rectifier pattern；When the running frequency is small
When the preset value, the controller controls the second switch module to disconnect, to control the current rectifying and wave filtering circuit to work
In full-bridge rectification pattern.
9. the power factor correction circuit as described in any one of claim 1 to 8, the power factor correction module includes rectification list
Member, switch element and driver element；
Two inputs of the rectification unit are described two ac input ends of power factor correction module, the rectification unit
Two output ends it is in parallel with the switch element；
The control end of the switch element connects the driver element, and the input of the driver element is linked as the power factor (PF)
The control end of correction module.
10. a kind of transducer air conditioning, including the power factor correction circuit as described in any one of claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710535265.5A CN107276388B (en) | 2017-06-30 | 2017-06-30 | PFC circuit and variable frequency air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710535265.5A CN107276388B (en) | 2017-06-30 | 2017-06-30 | PFC circuit and variable frequency air conditioner |
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| CN107276388A true CN107276388A (en) | 2017-10-20 |
| CN107276388B CN107276388B (en) | 2023-03-31 |
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| CN201710535265.5A Active CN107276388B (en) | 2017-06-30 | 2017-06-30 | PFC circuit and variable frequency air conditioner |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713983A (en) * | 2018-12-29 | 2019-05-03 | 常州朗奇威电器有限公司 | Over Current Protection System, controller and over-current protection method |
| CN109980915A (en) * | 2019-05-17 | 2019-07-05 | 广东美的制冷设备有限公司 | Circuit of power factor correction and air conditioner |
| CN110311547A (en) * | 2019-07-09 | 2019-10-08 | 广东美的制冷设备有限公司 | Pfc circuit and air conditioner |
| CN110417251A (en) * | 2019-07-09 | 2019-11-05 | 广东美的制冷设备有限公司 | Pfc circuit and air conditioner |
| CN110474527A (en) * | 2019-08-15 | 2019-11-19 | 海信（山东）空调有限公司 | Converter plant and its control method, the air conditioner of three phase electric power factor correction |
| CN110601557A (en) * | 2018-06-13 | 2019-12-20 | 重庆美的制冷设备有限公司 | High-integration intelligent power module and electrical equipment |
| CN111641334A (en) * | 2020-06-05 | 2020-09-08 | 广东美的制冷设备有限公司 | Variable frequency control device and air conditioner |
| CN112432310A (en) * | 2020-10-23 | 2021-03-02 | 珠海格力电器股份有限公司 | Power factor calibration system, method, processor, compressor, air conditioner and medium |
| CN113595412A (en) * | 2021-08-27 | 2021-11-02 | 康佳集团股份有限公司 | LLC circuit and switching power supply |
| CN114640240A (en) * | 2022-02-16 | 2022-06-17 | 华为数字能源技术有限公司 | Bridgeless power factor correction protection circuit, control method and power module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933307A (en) * | 2006-08-31 | 2007-03-21 | 上海交通大学 | Active passive mixed single phase power factor correcting circuit |
| US20130141004A1 (en) * | 2011-12-01 | 2013-06-06 | RAB Lighting Inc. | Led driver protection circuit |
| CN103973134A (en) * | 2013-01-30 | 2014-08-06 | 广东美的制冷设备有限公司 | Direct-current power device and PWM (pulse width modulation) pulse control method for improving power factor thereof |
| CN104834239A (en) * | 2015-05-12 | 2015-08-12 | 广东美的制冷设备有限公司 | Current loop communication and power supply control circuit of air conditioner and outdoor unit thereof |
-
2017
- 2017-06-30 CN CN201710535265.5A patent/CN107276388B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933307A (en) * | 2006-08-31 | 2007-03-21 | 上海交通大学 | Active passive mixed single phase power factor correcting circuit |
| US20130141004A1 (en) * | 2011-12-01 | 2013-06-06 | RAB Lighting Inc. | Led driver protection circuit |
| CN103973134A (en) * | 2013-01-30 | 2014-08-06 | 广东美的制冷设备有限公司 | Direct-current power device and PWM (pulse width modulation) pulse control method for improving power factor thereof |
| CN104834239A (en) * | 2015-05-12 | 2015-08-12 | 广东美的制冷设备有限公司 | Current loop communication and power supply control circuit of air conditioner and outdoor unit thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601557A (en) * | 2018-06-13 | 2019-12-20 | 重庆美的制冷设备有限公司 | High-integration intelligent power module and electrical equipment |
| CN109713983A (en) * | 2018-12-29 | 2019-05-03 | 常州朗奇威电器有限公司 | Over Current Protection System, controller and over-current protection method |
| CN109980915A (en) * | 2019-05-17 | 2019-07-05 | 广东美的制冷设备有限公司 | Circuit of power factor correction and air conditioner |
| CN110311547A (en) * | 2019-07-09 | 2019-10-08 | 广东美的制冷设备有限公司 | Pfc circuit and air conditioner |
| CN110417251A (en) * | 2019-07-09 | 2019-11-05 | 广东美的制冷设备有限公司 | Pfc circuit and air conditioner |
| CN110474527A (en) * | 2019-08-15 | 2019-11-19 | 海信（山东）空调有限公司 | Converter plant and its control method, the air conditioner of three phase electric power factor correction |
| CN111641334A (en) * | 2020-06-05 | 2020-09-08 | 广东美的制冷设备有限公司 | Variable frequency control device and air conditioner |
| CN111641334B (en) * | 2020-06-05 | 2021-11-23 | 广东美的制冷设备有限公司 | Variable frequency control device and air conditioner |
| CN112432310A (en) * | 2020-10-23 | 2021-03-02 | 珠海格力电器股份有限公司 | Power factor calibration system, method, processor, compressor, air conditioner and medium |
| CN112432310B (en) * | 2020-10-23 | 2022-08-26 | 珠海格力电器股份有限公司 | Power factor calibration system, method, processor, compressor, air conditioner and medium |
| CN113595412A (en) * | 2021-08-27 | 2021-11-02 | 康佳集团股份有限公司 | LLC circuit and switching power supply |
| CN113595412B (en) * | 2021-08-27 | 2023-08-18 | 康佳集团股份有限公司 | LLC circuit and switching power supply |
| CN114640240A (en) * | 2022-02-16 | 2022-06-17 | 华为数字能源技术有限公司 | Bridgeless power factor correction protection circuit, control method and power module |
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