CN207010546U - PFC circuit and transducer air conditioning - Google Patents
PFC circuit and transducer air conditioning Download PDFInfo
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- CN207010546U CN207010546U CN201720789801.XU CN201720789801U CN207010546U CN 207010546 U CN207010546 U CN 207010546U CN 201720789801 U CN201720789801 U CN 201720789801U CN 207010546 U CN207010546 U CN 207010546U
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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
Abstract
The utility model provides a kind of pfc circuit and transducer air conditioning, include forming rectification module by the branch circuit parallel connection that diode is composed in series with the IGBT pipes for carrying fly-wheel diode by setting two, and the input of reactor connection AC power, reactor, rectification module are connected in ac power supply circuit, rectification module output end is connected in parallel on after first electric capacity and the series connection of the second electric capacity, and switch module one end connection ac power supply circuit, the other end connect the common contact of the first electric capacity and the second electric capacity.The pfc circuit of the utility model embodiment is at work, its current loop is at most only by two diodes including the fly-wheel diode of diode and IGBT pipes, the each diode needed by two rectifier bridge stacks compared with the prior art, the working quantity of diode is greatly reduced, therefore the heating loss for reducing whole pfc circuit reduces the waste of energy.
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, it is existing
The pfc circuit of voltage multiplying rectifier scheme all includes two rectifier bridge stacks, wherein a bridge heap is used for voltage multiplying rectifier, one is served only in addition
Powered after full-wave rectification to PFC parts, in the whole PFC circuits course of work, each diode of this two bridge heaps is a total of
8 diodes will work, and because the operating current of pfc circuit is big, therefore the heating of the two bridge heaps is big, causes very big energy
Waste.And existing pfc circuit can only operate under voltage multiplying rectifier mode, loaded work piece in a low-power state when exist
The problem of conversion efficiency is relatively low, therefore cause the waste of energy.
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
The pfc circuit bridge heap heating of voltage multiplying rectifier mode is big and the problem of conversion efficiency is low under low power load be present.
To achieve the above object, a kind of pfc circuit provided by the utility model, including reactor, rectification module, switching molding
Block, the first electric capacity, the second electric capacity, controller and drive module；
The input of the reactor connection AC power, the reactor, rectification module are connected on ac power supply circuit
In；
The rectification module output end 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 rectification module output end, the rectification module to the AC rectification of input into
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 rectification module includes the first rectification unit and the second rectification unit, and first rectification unit includes the one or two
Pole pipe and the first IGBT pipes, second rectification unit includes the second diode and the 2nd IGBT is managed, first rectification unit
In parallel with the second rectification unit, first rectification unit and the second rectification unit include by diode respectively and carry afterflow two
The branch road that the IGBT pipes of pole pipe are composed in series, the control terminal of two IGBT pipes of the rectification module connect the control respectively
Device, two IGBT pipes of the rectification module carry out switch switching under control of the controller, with what is exported to the rectification module
DC voltage and DC current carry out Active PFC；
Described switch module one end connects the ac power supply circuit, and the other end connects first electric capacity and the second electric capacity
Common contact, the control terminal of the switch module connects the controller, and the controller controls the break-make of the switch module,
To be formed rectification circuit by rectification module and first electric capacity and the second electric capacity described in control and be realized full-bridge rectification and multiplication of voltage
Rectification switches.
The positive pole of first diode connects the source class of the first IGBT pipes, the positive pole connection of second diode
The source class of the 2nd IGBT pipes, first diode cathode are in parallel with the negative pole of second diode as the rectification
The cathode output end of module, the drain electrode of the first IGBT pipes are in parallel with the drain electrode of the 2nd IGBT pipes as the rectification mould
The cathode output end of block.
The positive pole of first diode connects the source class of the first IGBT pipes, the positive pole connection of second diode
The source class of the 2nd IGBT pipes, the source class and the source class of the 2nd IGBT pipes of the first IGBT pipes are in parallel as described
The cathode output end of rectification module, first diode cathode are in parallel with the negative pole of second diode as the rectification
The cathode output end of module.
Preferably, one end of the switch module connects the zero line input of the alternating voltage, described in other end connection
The common contact of first electric capacity and the second electric capacity.
Preferably, one end of the switch module connects the live wire input of the alternating voltage, described in other end connection
The common contact of first electric capacity and the second electric capacity.
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 two IGBT pipes of the rectification module switches over.
Preferably, in addition to voltage detection module,
The voltage detection module is connected in parallel on the rectification module output end, the output end connection of the voltage detection module
The controller, to detect the DC voltage value of the rectification module output.
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 switch module conducting is made, 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 switch module to disconnect, to control the current rectifying and wave filtering circuit to be operated in entirely
Bridge rectification mode.
To achieve the above object, the utility model also provides a kind of transducer air conditioning, and the transducer air conditioning includes described
Pfc circuit.
Pfc circuit provided by the utility model, by setting two to include by diode and carrying fly-wheel diode
The branch circuit parallel connection that IGBT pipes are composed in series forms rectification module, and the input of reactor connection AC power, reactor, rectification
Block coupled in series is connected in parallel on rectification module output end, and switch in ac power supply circuit after the first electric capacity and the series connection of the second electric capacity
Module one end connects ac power supply circuit, and the other end connects the common contact of the first electric capacity and the second electric capacity.The utility model is implemented
At work, its current loop is at most only by including the fly-wheel diode of diode and IGBT pipes for the pfc circuit of example
Two diodes, each diode needed by two rectifier bridge stacks compared with the prior art, greatly reduce diode
Working quantity, therefore the heating loss for reducing whole pfc circuit reduces the waste of energy.It is moreover, real by switch module
The switching of existing full-bridge rectification and voltage multiplying rectifier pattern, realize when loaded work piece in a low-power state when, pfc circuit remains to reality
Existing high-conversion rate, solving the pfc circuit of single voltage multiplying rectifier pattern in the prior art, conversion efficiency is low under low power scenarios makes
Into energy dissipation problem.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the utility model pfc circuit first embodiment；
Fig. 2 is to be operated in current loop schematic diagram of the reactor in energy storage under full-bridge rectification pattern in first embodiment；
Fig. 3 is to be operated in the electric current for charging to the first electric capacity and the second electric capacity under full-bridge rectification pattern in first embodiment to return
Road schematic diagram；
Fig. 4 is to be operated in another current loops of the reactor L in energy storage under full-bridge rectification pattern in first embodiment to show
It is intended to；
Fig. 5 is that another electricity to be charged under full-bridge rectification pattern to the first electric capacity and the second electric capacity is operated in first embodiment
Flow circuit diagram；
Fig. 6 is to be operated in first embodiment under voltage multiplying rectifier pattern to the current loop schematic diagram of the first electric capacity charging；
Fig. 7 is to be operated in first embodiment under voltage multiplying rectifier pattern to the current loop schematic diagram of the second electric capacity charging；
Fig. 8 is the electrical block diagram of the utility model pfc circuit second embodiment；
Fig. 9 is to be operated in second embodiment under voltage multiplying rectifier pattern to the current loop schematic diagram of the second electric capacity charging；
Figure 10 is to be operated in second embodiment under voltage multiplying rectifier pattern to the current loop schematic diagram of the first electric capacity charging；
Figure 11 is the electrical block diagram of the utility model pfc circuit 3rd embodiment；
Figure 12 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, rectification module 10, the electricity of switch module 20, first
Hold E1, the second electric capacity E2, controller 30 and drive module 40；
The input of reactor L connection AC powers, reactor L, rectification module 10 are connected in ac power supply circuit；
The output end of rectification module 10 is connected in parallel on after first electric capacity E1 and the second electric capacity E2 series connection,
Drive module 40 is connected in parallel on the output end of rectification module 10, and rectification module 10 is to the AC rectification of input into direct current
Electricity, to provide power supply, the control terminal of drive module 40 connection controller 30, the control driving mould of controller 30 for the work of drive module 40
Block 40 is run with driving load；
Rectification module 10 includes the first rectification unit 11 and the second rectification unit 12, and first rectification unit 11 includes the
One diode D1 and the first IGBT pipe Q1, second rectification unit 12 include the second diode D2 and the 2nd IGBT pipe Q2, the
One rectification unit 11 and the second rectification unit 12 are in parallel, and the first rectification unit 11 and the second rectification unit 12 include by two poles respectively
Manage and carry IGBT pipe (Insulated Gate Bipolar Transistor, the insulated gate bipolar crystal of fly-wheel diode
Pipe) branch road that is composed in series, the control terminal of two IGBT pipes of rectification module 10 connects controller 30, rectification module 10 respectively
Two IGBT pipes controller 30 control under carry out switch switching, with the DC voltage and direct current exported to rectification module 10
Stream carries out Active PFC；
The one end of switch module 20 connects ac power supply circuit, and other end connection the first electric capacity E1's and the second electric capacity E2 connects altogether
Point, the control terminal connection controller 30 of switch module 20, the break-make of the controlling switch module 20 of controller 30, to control by rectification mould
The electric capacity E1 of block 10 and first and the second electric capacity E2 composition rectification circuits realize full-bridge rectification and voltage multiplying rectifier switching.
Specifically, switch module 20 includes the switch K1 mono- of switch K1 and driving switch K1 switch drive unit 1 here
As be relay, the drive circuit that switch drive unit is formed for the circuit of corresponding driving relay if any triode, three poles
The controlled stage of pipe is that base stage is the control terminal of first switch module 20, and the switch ends of relay are the two of first switch module 20
End, controller 60 are break-make of the MCU control port by output signal by switch drive unit controlling switch K1.This
In because relay and driving relay switch drive unit be prior art, its physical circuit is not repeating.
First rectification unit 11 of rectification module 10 includes the first diode D1 and the first IGBT pipe Q1, the second rectification unit
12 include the second diode D2 and the 2nd IGBT pipes Q2；
First diode D1 positive pole connects the first IGBT pipes Q1 colelctor electrode, the second diode D2 positive pole connection the
Two IGBT pipes Q2 colelctor electrode, the first diode D1 negative poles are in parallel with the second diode D2 negative pole as rectification module 10
Cathode output end, the first IGBT pipes Q1 emitter stage and the 2nd IGBT pipes Q2 emitter stage negative pole in parallel as rectification module 10
Output end.
The zero line input of one end connection AC power of switch module 20, other end connection the first electric capacity E1 and second
Electric capacity E2 common contact.
The pfc circuit of the present embodiment also includes zero passage detection module 60, and it is defeated that zero passage detection module 60 is connected in parallel on AC power
Enter end, the output end of zero passage detection module 60 connection controller 30, to detect the voltage zero-crossing signal of AC power, controller according to
The on off state of two IGBT pipes of voltage zero-crossing signal control rectification module 10 switches over.Zero passage detection module 60 it is specific
Circuit refers to prior art, will not be repeated here.
The pfc circuit of the present embodiment also includes current detection module 50, and current detection module 50 is series at ac circuit, figure
Current detection module 50 is connected on the zero line of AC power in 1, naturally it is also possible to is connected on the zero line side of AC power, electric current
The output end connection controller 30 of detection module 50, to detect the AC current values of AC power input.Current detection module 50
By being formed including current transformer T1 and additional detection circuit, the physical circuit of current detection module 50 refers to prior art,
It will not be repeated here.
The pfc circuit of the present embodiment also includes voltage detection module 70, and voltage detection module 70 is connected in parallel on rectification module 10
Output end, the output end connection controller 30 of voltage detection module 70, to detect the DC voltage value of the output of rectification module 10.Electricity
Detection module 70 is pressed to use the ball bearing made composition based on electric resistance partial pressure structure type, physical circuit refers to prior art,
It will not be repeated here.
Pfc circuit operation principle shown in the present embodiment is as follows：When the K1 of switch module 20 disconnects, by rectification module 10
Full-bridge rectification pattern is operated in the first electric capacity E1 and the second electric capacity E2 current rectifying and wave filtering circuits formed.As shown in Fig. 2 when control
When device 30 processed controls the first IGBT pipes Q1 conductings, the 2nd IGBT pipes Q2 cut-offs, now AC power electric current is that L lines go out from live wire
Hair through reactor L, the first IGBT pipes Q1 collector and emitter, the 2nd IGBT pipes Q2 sustained diode 4 positive pole and
Negative pole returns to AC power zero line i.e. N lines and forms loop, realizes the energy storage to reactor L；As shown in figure 3, when controller 30 is controlled
When making the first IGBT pipes Q1 cut-offs, induced electromotive force is produced on reactor L, it flows through the reactor L sense of current and first
It is consistent before IGBT pipes Q1 cut-offs, now electric current caused by reactor L induced electromotive force is through the first diode D1, first
Electric capacity E1, the second electric capacity E2, the 2nd IGBT pipes Q2 sustained diode 4 form current loop with to the first electric capacity E1 and second
Electric capacity E2 charge, with this realize AC power electric current from L line starting directions when from rectification module 10 export DC voltage
With the Active PFC of electric current.As shown in figure 4, when controller 30 controls the 2nd IGBT pipes Q2 conductings, the first IGBT pipes Q1 to cut
When only, now AC power electric current from live wire be collector and emitter of the N lines through the 2nd IGBT pipes Q2, the first IGBT pipe
Positive pole and negative pole, the reactor L of Q1 sustained diode 3 return to AC power zero line i.e. L lines and form loop, realize to reactance
Device L energy storage；As shown in figure 5, when controller 30 controls the 2nd IGBT pipes Q2 cut-offs, induction electric is produced on reactor L
Gesture, it flows through before the reactor L sense of current ends with the 2nd IGBT pipes Q2 and is consistent, now reactor L induction electric
Electric current caused by gesture through the second diode D2, the first electric capacity E1, the second electric capacity E2, the first IGBT pipes Q1 sustained diode 3
Current loop is formed to the first electric capacity E1 and the second electric capacity E2 chargings, to realize AC power electric current with this and go out originating party from N lines
To when from rectification module 10 export DC voltage and electric current Active PFC.In sensing caused by above-mentioned reactor L
Electromotive force is in the first electric capacity E1 and the second electric capacity E2 charging processes, the first diode D1, the second diode D2, the first IGBT are managed
The Q1 IGBT pipes Q2 of sustained diode 3 and the 2nd sustained diode 4 forms full-bridge rectification mode, therefore, controller difference
By controlling the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 alternate conduction and cut-off, the work(under full-bridge rectification pattern is realized
Rate factor correction function.
When the K1 closures of switch module 20, it is made up of the electric capacity E1 of rectification module 10 and first and the second electric capacity E2 whole
Stream filter circuit is operated in voltage multiplying rectifier pattern.When controller 30 controls the first IGBT pipes Q1 conductings, the 2nd IGBT pipes Q2 cut-offs
When, AC power electric current is identical with Fig. 2 from the loop of L lines, realizes the energy storage to reactor L；As shown in fig. 6, when control
When device 30 processed controls the first IGBT pipes Q1 cut-offs, induced electromotive force is produced on reactor L, it flows through the reactor L sense of current
With the first IGBT pipes Q1 end before be consistent, now electric current caused by reactor L induced electromotive force through the first diode D1,
First electric capacity E1, switch K1 form loop to be charged to the first electric capacity E1, realize AC power electric current with this and go out originating party from L lines
To when from rectification module 10 export DC voltage and electric current Active PFC.When controller 30 controls the 2nd IGBT pipes
When Q2 conductings, the first IGBT pipes Q1 cut-offs, AC power electric current is identical with Fig. 4 from the loop of N lines, realizes to reactance
Device L energy storage；As shown in fig. 7, when controller 30 controls the 2nd IGBT pipes Q2 cut-offs, induced electromotive force is produced on reactor L,
It flows through before the reactor L sense of current ends with the 2nd IGBT pipes Q2 and is consistent, now reactor L induced electromotive force production
Raw electric current through switch K1, the second electric capacity E2, the first IGBT pipes Q1 sustained diode 3 into current loop with to the second electric capacity
E2 charge, with this realize AC power electric current from N line starting directions when from rectification module 10 export DC voltage and electricity
The Active PFC of stream.Opposed polarity induced electromotive force caused by above-mentioned reactor L is respectively to the electricity of the first electric capacity E1 and second
Hold E2 chargings, therefore the first electric capacity E1 and the voltage at the second electric capacity E2 both ends are one times of voltage on single electric capacity, are realized again
Press rectifier system.Therefore, controller respectively by control the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 alternate conduction and cut-off,
Realize the Active PFC function under voltage multiplying rectifier pattern.
Pfc circuit shown in the present embodiment, the load that drive module 40 drives include compressor or motor, pressure here
Contracting machine or motor are permagnetic synchronous motor, and drive module is included by IPM modules (Intelligent Power Module, intelligence
Power model) composition circuit, under the control of controller 30, realize the DC inverter that will be carried in IPM modules into exchange
Electricity realizes the driving to compressor or motor.At work, what it is due to pfc circuit input is to hand over to the pfc circuit of the present embodiment
Flow electric current, it is therefore desirable to ensure to maintain electric current in the first IGBT pipes Q1 or the 2nd IGBT pipes Q2 work, to realize to reactor L
Energy storage, thus controller is needed to detect the zero cross signal of alternating current by zero detection module 60, and the is just controlled after zero passage
One IGBT pipes Q1 or the 2nd IGBT pipes are turned on to guarantee to realize the energy storage to reactor L by lasting electric current.And PFC electricity
In the course of the work, controller 30 also needs to obtain the operating current of current circuit by current detection module 50 on road, if hair
The operating current now loaded is too high, when causing the operating current of pfc circuit too high, controller 30 control two IGBT pipes to close with
Close the work of PFC circuits and protect whole pfc circuit.In the process, controller 30 also needs to pass through the pfc circuit of the present embodiment
The DC voltage that voltage detection module 70 detects rectification module output in real time is DC bus-bar voltage, inclined in d-c bus voltage value
Gao Shi, the pwm value that can be turned on by adjusting the first IGBT pipes Q1 or the 2nd IGBT pipes, to reduce the DC bus-bar voltage of output
Value, realize the stabilization of d-c bus voltage value.
The pfc circuit of the present embodiment from the above-mentioned course of work it is recognised that when being operated under full-bridge rectification pattern,
During reactor L energy storage, current loop only passes through the fly-wheel diode of one of IGBT pipes, and produces induced electricity in reactor L
When kinetic potential charges to the first electric capacity E1 and the second electric capacity E2, current loop only a diode therethrough and one of them
The fly-wheel diode of IGBT pipes；When being operated under voltage multiplying rectifier pattern, in reactor L energy storage, current loop only passes through it
In an IGBT pipe fly-wheel diode, and reactor L produce induced electromotive force the first electric capacity E1 and the second electric capacity E2 are filled
When electric, the current loop only fly-wheel diode of a diode therethrough or one of IGBT pipes.Therefore it is relatively existing
When the pfc circuit for having two rectifier bridge stacks of sampling of technology works, each diode of every bridge heap works, the utility model
The pfc circuit of embodiment greatly reduces the working quantity of diode at work, therefore reduces the heating of whole pfc circuit
Loss reduces the waste of energy.
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, due to needing relatively high voltage to drive its normal work,
Therefore voltage multiplying rectifier is needed to lift the d-c bus voltage value of output.And when under low power load, if compressor work
To make 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, due to
Pfc circuit conversion efficiency now under voltage multiplying rectifier pattern is low, and now compressor can need not be relatively high operating voltage
Value, therefore the controlling switch module 20 of controller 30 disconnects, and current rectifying and wave filtering circuit is allowed when being operated under full-bridge rectification pattern, due to complete
The conversion efficiency lifting of pfc circuit, the efficiency that can now improve whole pfc circuit reduce energy dissipation under bridge rectification mode.
Specifically, controller 30 needs to obtain the frequency of current compressor, if the frequency of compressor is current compression less than preset value
Machine operating current is relatively low, and controlling switch module 20 is disconnected to allow current rectifying and wave filtering circuit to be operated in full-bridge rectification pattern to improve PFC
Circuit conversion efficiency；The controlling switch module if the frequency of compressor is the increase of current compressor operating current more than preset value
20 conductings maintain the normal work of load to allow current rectifying and wave filtering circuit to be operated in voltage multiplying rectifier pattern to improve loaded work piece voltage
Make.
The pfc circuit that the utility model embodiment provides, by setting two to include by diode and carrying the pole of afterflow two
The branch circuit parallel connection that the IGBT pipes of pipe are composed in series forms rectification module 10, and the input of reactor L connection AC powers, reactance
Device L, rectification module 10 are connected in ac power supply circuit, and rectification module is connected in parallel on after the first electric capacity E1 and the second electric capacity E2 series connection
10 output ends, and switch module one end connection ac power supply circuit, other end connection the first electric capacity E1's and the second electric capacity E2 is total to
Contact.At work, its current loop is at most only by including diode and IGBT for the pfc circuit of the utility model embodiment
Two diodes including the fly-wheel diode of pipe, each two pole needed by two rectifier bridge stacks compared with the prior art
Pipe, greatly reduces the working quantity of diode, therefore the heating loss for reducing whole pfc circuit reduces the wave of energy
Take.Moreover, realizing the switching of full-bridge rectification and voltage multiplying rectifier pattern by switch module, realize when loaded work piece is in low-power
When under state, pfc circuit remains to realize high-conversion rate, solves the pfc circuit of single voltage multiplying rectifier pattern in the prior art low
Conversion efficiency is low under power situation causes energy dissipation problem.
Further, based on the utility model pfc circuit first embodiment, the PFC electricity of the utility model second embodiment
Road from first embodiment as shown in figure 8, be a difference in that the circuit connecting mode of switch module 20 is different.
The live wire input of one end connection AC power of switch module 20, other end connection the first electric capacity E1 and second
Electric capacity E2 common contact.
In the present embodiment, switch module 20 is changed to be connected to the live wire i.e. L line ends of nearly AC power, is specifically connected in parallel on
Between reactor L and an ac input end of rectification module 20.
The pfc circuit of the present embodiment operation principle and first embodiment when switch module disconnects and is in full-bridge rectification pattern
It is identical.When switch module closed loop is under voltage multiplying rectifier pattern, cause when the first IGBT pipes Q1 or the 2nd IGBT pipes Q2 is turned on
Reactor L is in when under energy storage state that its operation principle is identical with first embodiment, be a difference in that as the first IGBT pipes Q1 or
It is different that 2nd IGBT pipes Q2 ends the current loop that induced electromotive force caused by reactor L is formed.As shown in figure 9, when the
One IGBT pipes Q1 from conducting become cut-off when, produce induced electromotive force on reactor L, its flow through the reactor L sense of current with
It is consistent before first IGBT pipes Q1 cut-offs, now electric current caused by reactor L induced electromotive force is through switching K1, the second electric capacity
E2, the 2nd IGBT pipes Q2 sustained diode 4 form loop to be charged to the second electric capacity E2, and AC power electricity is realized with this
Flow from L line starting directions when from rectification module 10 export DC voltage and electric current Active PFC；As shown in Figure 10,
When the 2nd IGBT pipes Q2 becomes cut-off from conducting, induced electromotive force is produced on reactor L, it flows through reactor L electric current side
It is consistent to before ending with the 2nd IGBT pipes Q2, now electric current caused by reactor L induced electromotive force is through the second diode
D2, the first electric capacity E1, switch K1 form loop to be charged to the first electric capacity E1, realize AC power electric current with this and go out from N lines
Originating party to when from rectification module 10 export DC voltage and electric current Active PFC.Above-mentioned charging process is only passed through
One diode, to pass through each diode of two rectifier bridge stacks compared with the prior art will greatly reduce, therefore reduce whole
The heating loss of individual pfc circuit.
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 11, different from the circuit structure that first embodiment is a difference in that rectification module 10.
The positive pole of first diode connects the first IGBT pipes Q1 colelctor electrode, and the positive pole of the second diode connects the 2nd IGBT
Pipe Q2 colelctor electrode, the first diode cathode cathode output end as rectification module in parallel with the negative pole of the second diode, the
One IGBT pipes Q1 emitter stage and the 2nd IGBT pipes Q2 emitter stage cathode output end in parallel as rectification module.I.e. first is whole
The link position for flowing the diode in the rectification unit 12 of unit 11 and second and IGBT pipes is exchanged with respect to first embodiment.
The pfc circuit principle of the present embodiment is similar to first embodiment, in the first IGBT pipes Q1 of pfc circuit or second
When IGBT pipes Q2 is turned on, its electric current passes through the fly-wheel diode and other one of one of IGBT pipes respectively in current loop
The collector and emitter of individual IGBT pipes is with to reactor L energy storage；And become in the first IGBT pipes Q1 or the 2nd IGBT pipes Q2 conductings
Into cut-off when, caused by its reactor L induced electromotive force difference switch module 20 disconnect and closed loop formed full-bridge rectification and times
Repoussage stream mode charges to the first electric capacity E1 and the second electric capacity E2, and its charge circuit at most only passes through a diode and one
The fly-wheel diode of IGBT pipes, it is identical with the diode operation quantity of first embodiment, therefore compared with the prior art equally significantly
Reduce the working quantity of diode, therefore the heating loss for reducing whole pfc circuit reduces the waste of energy.
Further, based on the utility model pfc circuit 3rd embodiment, the PFC electricity of the utility model fourth embodiment
Road is as shown in figure 12, different from the circuit connecting mode that 3rd embodiment is a difference in that switch module 20.Switch module 20
Circuit connecting mode of the connected mode with switch module in second embodiment 20.
The pfc circuit principle of the present embodiment is similar to 3rd embodiment, in the pfc circuit course of work, its current loop
In at most only by the fly-wheel diodes of a diode and an IGBT pipe, the diode operation quantity phase with first embodiment
Together, therefore the working quantity of diode is equally greatly reduced compared with the prior art, therefore reduce the heating of whole pfc circuit
Loss reduces the waste of energy.
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)
- A kind of 1. power factor correction circuit, it is characterised in that including reactor, rectification module, switch module, the first electric capacity, Second electric capacity, controller and drive module；The input of the reactor connection AC power, the reactor, rectification module are connected in ac power supply circuit；The rectification module output end 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 rectification module output end, and the rectification module is to the AC rectification of input into direct current Electricity, to provide power supply for drive module work, the drive module control terminal connects the controller, the controller control The drive module is made to run with driving load；The rectification module includes the first rectification unit and the second rectification unit, and first rectification unit includes the first diode Managed with the first IGBT, second rectification unit includes the second diode and the 2nd IGBT and managed, first rectification unit and the Two rectification units are in parallel, and first rectification unit and the second rectification unit include by diode respectively and carry fly-wheel diode The branch road that is composed in series of IGBT pipes, the control terminal of two IGBT pipes of the rectification module connects the controller, institute respectively The two IGBT pipes for stating rectification module carry out switch switching under control of the controller, with the direct current exported to the rectification module Pressure and DC current carry out Active PFC；Described switch module one end connects the ac power supply circuit, and the other end connects being total to for first electric capacity and the second electric capacity Contact, the control terminal of the switch module connect the controller, and the controller controls the break-make of the switch module, with control Formed rectification circuit by rectification module and first electric capacity and the second electric capacity described in system and realized full-bridge rectification and voltage multiplying rectifier Switching.
- 2. power factor correction circuit as claimed in claim 1, it is characterised in thatThe positive pole of first diode connects the source class of the first IGBT pipes, described in the positive pole connection of second diode The source class of 2nd IGBT pipes, first diode cathode are in parallel with the negative pole of second diode as the rectification module Cathode output end, the drain electrodes of the first IGBT pipes is in parallel with the drain electrode of the 2nd IGBT pipes as the rectification module Cathode output end.
- 3. power factor correction circuit as claimed in claim 1, it is characterised in thatThe positive pole of first diode connects the source class of the first IGBT pipes, described in the positive pole connection of second diode The source class of 2nd IGBT pipes, the source class of the first IGBT pipes are in parallel with the source class of the 2nd IGBT pipes as the rectification mould The cathode output end of block, first diode cathode are in parallel with the negative pole of second diode as the rectification module Cathode output end.
- 4. power factor correction circuit as claimed in claim 1, it is characterised in thatOne end of the switch module connects the zero line input of the alternating voltage, and the other end connects first electric capacity and the The common contact of two electric capacity.
- 5. power factor correction circuit as claimed in claim 1, it is characterised in thatOne end of the switch module connects the live wire input of the alternating voltage, and the other end connects first electric capacity and the The common contact of two 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 two IGBT pipes of rectification module switches over.
- 8. power factor correction circuit as claimed in claim 1, it is characterised in that also including voltage detection module,The voltage detection module is connected in parallel on the rectification module output end, described in the output end connection of the voltage detection module Controller, to detect the DC voltage value of the rectification module output.
- 9. power factor correction circuit as claimed in claim 1, it is characterised in thatWhen 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 Switch module conducting is stated, to control the current rectifying and wave filtering circuit to be operated in voltage multiplying rectifier pattern；When the running frequency is less than institute When stating preset value, the controller controls the switch module to disconnect, whole to control the current rectifying and wave filtering circuit to be operated in full-bridge Stream mode.
- 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 |
|---|---|---|---|
| CN201720789801.XU CN207010546U (en) | 2017-06-30 | 2017-06-30 | PFC circuit and transducer air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720789801.XU CN207010546U (en) | 2017-06-30 | 2017-06-30 | PFC circuit and transducer air conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207010546U true CN207010546U (en) | 2018-02-13 |
Family
ID=61449485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720789801.XU Withdrawn - After Issue CN207010546U (en) | 2017-06-30 | 2017-06-30 | PFC circuit and transducer air conditioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207010546U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972831A (en) * | 2020-07-22 | 2022-01-25 | 广东美的制冷设备有限公司 | Power factor correction circuit and control method thereof, medium, compressor and air conditioner |
| CN113972823A (en) * | 2020-07-22 | 2022-01-25 | 广东美的制冷设备有限公司 | Totem-pole PFC circuit, control method, circuit board and air conditioner |
| CN113972822A (en) * | 2020-07-22 | 2022-01-25 | 广东美的制冷设备有限公司 | Power factor correction circuit and control method thereof, medium, compressor and air conditioner |
-
2017
- 2017-06-30 CN CN201720789801.XU patent/CN207010546U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972831A (en) * | 2020-07-22 | 2022-01-25 | 广东美的制冷设备有限公司 | Power factor correction circuit and control method thereof, medium, compressor and air conditioner |
| CN113972823A (en) * | 2020-07-22 | 2022-01-25 | 广东美的制冷设备有限公司 | Totem-pole PFC circuit, control method, circuit board and air conditioner |
| CN113972822A (en) * | 2020-07-22 | 2022-01-25 | 广东美的制冷设备有限公司 | Power factor correction circuit and control method thereof, medium, compressor and air conditioner |
| WO2022017323A1 (en) * | 2020-07-22 | 2022-01-27 | 广东美的制冷设备有限公司 | Totem pole pfc circuit, control method, circuit board and air conditioner |
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