CN206908512U - PFC circuit and transducer air conditioning - Google Patents
PFC circuit and transducer air conditioning Download PDFInfo
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- CN206908512U CN206908512U CN201720790504.7U CN201720790504U CN206908512U CN 206908512 U CN206908512 U CN 206908512U CN 201720790504 U CN201720790504 U CN 201720790504U CN 206908512 U CN206908512 U CN 206908512U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model 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 formed 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 formed.Pfc circuit of the present utility model 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
It the utility model is related 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 supply is exported again after (Power Factor Correction, Active PFC) circuit generally use 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.
Utility model content
Main purpose of the present utility model is to provide a kind of pfc circuit and transducer air conditioning, it is therefore intended that solves existing
Pfc circuit be 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 provided by the utility model, including reactor, Active PFC mould
Block, rectification module, first switch module, second switch module, the first electric capacity, the second electric capacity and drive module；
The input of the reactor connection AC power, the reactor, the rectification module and the first switch
Block coupled in series is in ac power supply circuit；
The control terminal 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 terminal 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 terminal 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, described in the second switch module other end connection
The common contact of first electric capacity and the second electric capacity, the control terminal of the second switch module connect the controller, the controller
The break-make of the second switch module is controlled, to be made up of described in control 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.
Preferably, 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 connect 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.
Preferably, 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.
Preferably, 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.
Preferably, 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, and the other end of the second switch module connects being total to for first electric capacity and the second electric capacity
Contact.
Preferably, 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.
Preferably, 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 controls according to the voltage zero-crossing signal
The on off state of the power factor correction module switches over.
Preferably, 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.
Preferably, 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 terminal of the switch element connects the driver element, and the input of the driver element is linked as the power
Factor correction circuit control terminal.
To achieve the above object, the utility model also provides a kind of transducer air conditioning, and the transducer air conditioning includes described
Power factor correction circuit.
Pfc circuit provided by the utility model, by increasing first switch module and second switch mould in PFC electric currents
Block, first switch block coupled in series in the ac circuit by being formed including reactor, rectification module, power factor correction module
Ac input end is in parallel with the ac input end of rectification module, and second switch module one end is connected in above-mentioned ac circuit, separately
Outer 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 formed.It is of the present utility model
Pfc circuit realizes current rectifying and wave filtering circuit in pfc circuit by second switch module and is operated in full-bridge rectification module and times repoussage
The switching of stream mode, pfc circuit remains to realize high conversion efficiency during realizing that load is in low power run, and first switch mould
Block realizes the power supply that whole PFC and load can be disconnected when operation irregularity protection occurs in pfc circuit, realizes whole pfc circuit
Safeguard protection.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the utility model pfc circuit first embodiment；
Fig. 2 is the current loop schematic diagram being operated in first embodiment under voltage multiplying rectifier pattern；
Fig. 3 is the current loop schematic diagram being operated in first embodiment under voltage multiplying rectifier pattern；
Fig. 4 is the electrical block diagram of the utility model pfc circuit second embodiment；
Fig. 5 is the electrical block diagram of the utility model pfc circuit 3rd embodiment；
Fig. 6 is the current loop schematic diagram being operated in 3rd embodiment under voltage multiplying rectifier pattern；
Fig. 7 is the current loop schematic diagram being operated in 3rd embodiment under voltage multiplying rectifier pattern；
Fig. 8 is the electrical block diagram of the utility model pfc circuit fourth embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Reference picture 1, Fig. 1 are the pfc circuit structure chart that the utility model first embodiment provides, for convenience of description, only
The part related to the utility model embodiment is shown, details are as follows：
The pfc circuit that the utility model embodiment provides includes reactor L, power factor correction module 10, rectification module
40th, first 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 terminal connection controller 60 of first switch module 20, controller 60 control the break-make of first switch 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 terminal 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 forms pfc circuit, the control terminal 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 terminal connection controller 60 of second switch module 30, controller 60 control second switch mould
The break-make of block 30, current rectifying and wave filtering circuit is formed by the electric capacity E1 of rectification module 40 and first and the second electric capacity E2 with control and realized entirely
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 the drive circuit that the circuit of corresponding driving relay is formed if any triode,
The controlled stage of triode is that base stage is the control terminal of first switch module 20, and the switch ends of relay are first switch module 20
Both ends, controller 60 are 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 repeating.
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 terminal connection driver element 13 of switch element 12, the input of driver element 13 are linked as pfc circuit control terminal.
Here rectification unit 11 includes full-bridge rectification module BR1, realizes to the AC rectification of input into direct current, switchs
Unit includes being opened by what IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) was formed
The drive circuit that pipe Q1, PFC driver element 12 is driving switch pipe Q1 work is closed, the control terminal 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 switch, 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 formed, 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, other end connection the first electric capacity E1 and the second electric capacity E2 of second switch module 30 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, two test sides series connection of current detection module 70
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 forming, the output end of current detection module 70 and control
Device 60 connects, 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 formed
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
Obtain galvanic current 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 both 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 forms 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 electric current corresponding to 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 closures of first switch module 20, 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 work 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 figure
Dotted line shown in, alternating current is through switching K2, the second electric capacity E2, full-bridge rectification module BR2, reactor L return to alternating current from 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 both ends is twice of AC charging voltage after electric capacity E1 and the second electric capacity E2 series connection, i.e., is now operated in voltage multiplying rectifier mould
Formula.Meanwhile the work of pfc circuit and essentially identical, i.e., its current loop when switching tube Q1 is turned under above-mentioned switch K2 disconnections
It is same as described above, and the sense of current corresponding to induced electromotive force and switching tube Q1 are produced when switching tube Q1 disconnects, on reactor L
It is consistent before disconnection, 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 serves, 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 breaks
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 at work, by
What it is in pfc circuit input is alternating current, it is therefore desirable to ensures to maintain electric current when switching tube Q1 works, to realize to reactor
L energy storage, thus controller needs to detect the zero cross signal of alternating current by zero detection module 80, 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 working
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, and when causing the operating current of pfc circuit too high, 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 disconnected
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 increases 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 that low voltage such as inputs is 100V, the DC voltage of output can be lifted by voltage multiplying rectifier, is pressure with load
Exemplified by contracting machine, when compressor operating is under high power environment, reducing half with respect to the direct current that is exported under full-bridge mode can be with
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 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, and now controller 60 controls second switch mould
Block 30 disconnects, and allows current rectifying and wave filtering circuit when being operated under full-bridge rectification pattern, now the raising of pfc circuit conversion efficiency, although this
When operating current with respect to being improved under voltage multiplying rectifier pattern, but because the working frequency of compressor is low, its working current value still exists
In safe range.Therefore the wide load such as frequency-changeable compressor of current margin is directed to, 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 is disconnected to allow current rectifying and wave filtering circuit to be operated in full-bridge rectification pattern to improve pfc circuit conversion efficiency；If compressor
Frequency is that the increase of current compressor operating current then controls second switch module 30 to turn on to make rectifying and wave-filtering electric more than preset value
Road is operated in voltage multiplying rectifier pattern to reduce the supply current of load so that loaded work piece is safer to cause overcurrent protection incessantly.
The pfc circuit that the utility model embodiment provides, by increasing first switch module 20 and second in PFC electric currents
Switch module 30, first switch module 20 are connected in the ac circuit by being formed including reactor L, rectification module 40, power
The ac input end of factor correction module 10 is in parallel with the ac input end of rectification module 40, the connection of the one end of second switch module 30
In above-mentioned ac circuit, other end is connected to two electric capacity in the filter circuit that the first electric capacity E1 and the second electric capacity E2 is formed
Common contact.The pfc circuit of the utility model embodiment realizes rectifying and wave-filtering electricity in pfc circuit by second switch module 30
Road 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 remains to realize high-conversion rate, and first switch module 30 realize can be disconnected when operation irregularity protection occurs in pfc circuit it is whole
The power supply of individual pfc circuit, realize the safeguard protection of whole pfc circuit.
Further, based on the utility model pfc circuit first embodiment, the PFC electricity of the utility model second embodiment
Road is as shown in figure 4, be a difference in that the circuit side connector of first switch module 20 and second switch module 30 with first embodiment
Formula is different.
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, 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, it is disconnected the power supply to whole pfc circuit.The company of second switch module 30
It is identical with first embodiment to connect relation.
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 the utility model pfc circuit first embodiment, the PFC electricity of the utility model 3rd embodiment
Road is as shown in figure 5, be a difference in that the circuit side connector of first switch module 20 and second switch module 30 with first embodiment
Formula is different.
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 are identical with first embodiment.
In the present embodiment, when the K1 closures of first switch module 20, 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 closures of first switch module 20, 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, work 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 returns 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 sense of current corresponding to 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 the utility model pfc circuit first embodiment, the PFC electricity of the utility model fourth embodiment
Road is as shown in figure 8, be a difference in that the circuit side connector of first switch module 20 and second switch module 30 with first embodiment
Formula is different.
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, other end connection the first electric capacity E1 and the second electric capacity E2 of second switch module 30 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 are connected between reactor L and an ac input end of rectification module, and second opens
It is in parallel with one end of another and rectification module 40 of the first switch module 20 away from reactor L to close the one end of module 30.
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 utility model also provides a kind of transducer air conditioning, by indoor set, outdoor unit into wherein outdoor unit includes frequency conversion
Compressor, outdoor unit control circuit include above-mentioned pfc circuit, and its specific embodiment refers to above-described embodiment, herein
Repeat no more.
In the description of this specification, the description meaning of reference term " first embodiment ", " second embodiment ", " example " etc.
Refer to and be contained at least one implementation of the present utility model with reference to specific method, device or the feature that the embodiment or example describe
In example or example.In this manual, identical embodiment is necessarily directed to the schematic representation of above-mentioned term or shown
Example.Moreover, specific features, method, apparatus or the feature of description can close in any one or more embodiments or example
Suitable mode combines.In addition, in the case of not conflicting, those skilled in the art can be by described in this specification
Different embodiments or example and the feature of different embodiments or example are combined and combined.
Preferred embodiment of the present utility model is these are only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
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 input of the reactor connection AC power, the reactor, the rectification module and the first switch module
It is connected in ac power supply circuit；
The control terminal 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 exports through the rectification module rectification
Direct current, to provide power supply for drive module work, the drive module control terminal 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 terminal 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 terminal of the second switch module connect the controller, the controller control
The break-make of the second switch module, to form rectification by rectification module and first electric capacity and the second electric capacity described in control
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 exchange 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 controlling the voltage zero-crossing signal
The on off state of power factor correction module switches 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 terminal of the switch element connects the driver element, and the input of the driver element is linked as the power factor (PF)
The control terminal 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720790504.7U CN206908512U (en) | 2017-06-30 | 2017-06-30 | PFC circuit and transducer air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720790504.7U CN206908512U (en) | 2017-06-30 | 2017-06-30 | PFC circuit and transducer air conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206908512U true CN206908512U (en) | 2018-01-19 |
Family
ID=61291982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720790504.7U Withdrawn - After Issue CN206908512U (en) | 2017-06-30 | 2017-06-30 | PFC circuit and transducer air conditioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206908512U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258769A (en) * | 2021-05-31 | 2021-08-13 | 佛山市顺德区美的电子科技有限公司 | AC/DC multiplexing power supply circuit, control method, household appliance and storage medium |
| CN114123834A (en) * | 2021-10-29 | 2022-03-01 | 广东汇芯半导体有限公司 | Semiconductor circuit having a plurality of transistors |
-
2017
- 2017-06-30 CN CN201720790504.7U patent/CN206908512U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258769A (en) * | 2021-05-31 | 2021-08-13 | 佛山市顺德区美的电子科技有限公司 | AC/DC multiplexing power supply circuit, control method, household appliance and storage medium |
| CN114123834A (en) * | 2021-10-29 | 2022-03-01 | 广东汇芯半导体有限公司 | Semiconductor circuit having a plurality of transistors |
| CN114123834B (en) * | 2021-10-29 | 2024-03-29 | 广东汇芯半导体有限公司 | Semiconductor circuit with a high-voltage power supply |
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