CN106712535A - Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback - Google Patents
Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback Download PDFInfo
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- CN106712535A CN106712535A CN201710021428.8A CN201710021428A CN106712535A CN 106712535 A CN106712535 A CN 106712535A CN 201710021428 A CN201710021428 A CN 201710021428A CN 106712535 A CN106712535 A CN 106712535A
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
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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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses an intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback. The intelligent half-bridge correction wave voltage conversion circuit comprises an input rectifier and filter unit, a PFC booster unit, an interleaved flyback isolation transformation unit, a DC filtering unit and an inverter phase inversion unit. The interleaved flyback isolation transformation unit comprises a first switch tube, a second switch tube, a first transformer, a second transformer, a first diode, a second diode, a third diode and a fourth diode, wherein the second end of a primary winding of the first transformer is connected to the drain electrode of the first switch tube; the second end of a primary winding of the second transformer is connected to the drain electrode of the second switch tube; the first end of a secondary winding of the first transformer is connected to the anode of the third diode; the second end of the secondary winding of the second transformer is connected to the cathode of the fourth diode; and the cathode of the third diode and the anode of the fourth diode serve as the output end of the interleaved flyback isolation transformation unit. The intelligent half-bridge correction wave voltage conversion circuit can reduce ripples in the circuit, can simplify circuit structure and reduce circuit cost.
Description
Technical field
The present invention relates to voltage conversion circuit, more particularly to a kind of intelligent half-bridge amendment ripple based on PFC interleaving inverse excitations
Voltage conversion circuit.
Background technology
In the prior art, the intelligent boost-buck conversion equipment for turning AC by AC is otherwise known as travelling insert row, in the device, voltage
Change-over circuit is its Key Circuit, is a kind of circuit that can realize AC-AC conversion, can realize buck in AC-AC conversion
And the function of burning voltage and frequency.But current AC-AC just most of meaningful formula equipment Market be non-isolation type topology electricity
Road, and PF values are low, output voltage quality is low, security reliability is poor.Particularly during voltage conversion, more line can be produced
Wave interference, and then influence quality of voltage.Additionally, existing amendment wave voltage change-over circuit is present, and circuit structure is complicated, response is fast
Spend the defect such as slow, relatively costly.
The content of the invention
The technical problem to be solved in the present invention is, in view of the shortcomings of the prior art, there is provided a kind of to reduce circuit
Ripple, circuit structure can be simplified, circuit cost is reduced, output voltage quality can be improved, and safe and reliable interlocked based on PFC
The intelligent half-bridge amendment wave voltage change-over circuit of flyback.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that.
A kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, it is included：One input rectifying
Filter unit, its input connection power network, for carrying out rectification and filtering to line voltage；One PFC boost unit, is connected to defeated
Enter the output end of rectification filtering unit, boost conversion is carried out for the output voltage to input rectifying filter unit；One is staggeredly anti-
Swash isolated variable unit, include first switch pipe, second switch pipe, the first transformer, the second transformer, the first diode,
Second diode, the 3rd diode and the 4th diode, the first end of the first primary winding are connected to PFC boost
The output end of unit, the second end of the first primary winding is connected to the drain electrode of first switch pipe, and described first opens
The source electrode for closing pipe is connected to front end ground, and the drain electrode of the first switch pipe is connected to the anode of the first diode, the described 1st
The negative electrode of pole pipe is connected to the output end of PFC boost unit by first resistor, and the first resistor is parallel with the 3rd electric capacity, institute
The first end for stating the second primary winding is connected to the output end of PFC boost unit, the second primary winding
The second end be connected to the drain electrode of second switch pipe, the source electrode of the second switch pipe is connected to front end ground, the second switch
The drain electrode of pipe is connected to the anode of the second diode, and the negative electrode of second diode is connected to PFC boost by second resistance
The output end of unit, the second resistance is parallel with the 4th electric capacity, the grid of the first switch pipe and the grid of second switch pipe
Pole is respectively used to access the pwm pulse signal of two-way opposite in phase, and the first end of the first transformer secondary output winding is connected to
The anode of the 3rd diode, the second end of the first transformer secondary output winding is connected to rear end ground, second transformer
The first end of level winding is connected to rear end ground, and the second end of the second transformer secondary output winding is connected to the moon of the 4th diode
Pole, the negative electrode of the 3rd diode and the anode of the 4th diode as interleaving inverse excitation isolated variable unit output end；One
DC filter units, include the first electric capacity and the second electric capacity, and the negative electrode of the 3rd diode passes through the first capacitance connection in rear
End ground, the anode of the 4th diode passes through the second capacitance connection in rear end ground；One inversion reversed phase unit, is connected to staggeredly anti-
Swash the output end of isolated variable unit, the inversion reversed phase unit is used to enter the output voltage of interleaving inverse excitation isolated variable unit
Alternating current is exported after row inversion conversion.
Preferably, the input rectifying filter unit includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety
Electric capacity and rectifier bridge, the insurance are serially connected with the zero line of socket or live wire, and the front end of the common mode inhibition inductance is parallel to slotting
Seat, the lightning protection resistance is parallel to the front end of common mode inhibition inductance, and the input of the safety electric capacity and rectifier bridge is parallel to
The rear end of common mode inhibition inductance.
Preferably, the output end of the rectifier bridge is parallel with filter capacitor.
Preferably, the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and second
Electrochemical capacitor, the front end of the boost inductance is connected to the output end of input rectifying filter unit, the rear end of the boost inductance
The drain electrode of the 3rd switching tube is connected to, the source electrode of the 3rd switching tube connects front end ground, and the grid of the 3rd switching tube is used for
Access pwm control signal all the way, the anode of drain electrode first commutation diode of connection of the 3rd switching tube, first rectification
The negative electrode of diode as PFC boost unit output end, and first commutation diode negative electrode connect the second electrochemical capacitor
Positive pole, the negative pole of the second electrochemical capacitor connects front end ground.
Preferably, also include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and
The grid of the 3rd switching tube is connected to MCU control unit, and the MCU control unit is used to distinguishing output pwm signal to the
One switching tube, second switch pipe and the 3rd switching tube, to control first switch pipe, second switch pipe and the 3rd switching tube break-make shape
State.
Preferably, the MCU control unit includes single-chip microcomputer and its peripheral circuit.
Preferably, an AC sampling unit is also included, the AC sampling unit is connected to input rectifying filter unit
Input and MCU control unit between, the AC sampling unit is used to gather the electricity of input rectifying filter unit AC
Press and feed back to MCU control unit.
Preferably, the AC sampling unit includes amplifier, and two inputs of the amplifier are respectively by current limliting electricity
Hinder and be connected to the input of input rectifying filter unit, the output end of the amplifier is connected to MCU control unit.
Preferably, the first sampling resistor is connected between the source electrode and front end ground of the 3rd switching tube, the described 3rd opens
The source electrode for closing pipe is connected to MCU control unit, makes MCU control unit gather the 3rd switching tube by first sampling resistor
The electric signal of source electrode.
Preferably, a D/C voltage sampling unit is also included, the D/C voltage sampling unit includes for being sequentially connected in series
Two sampling resistors and the 3rd sampling resistor, the front end of second sampling resistor are connected to the defeated of interleaving inverse excitation isolated variable unit
Go out end, the rear end of the 3rd sampling resistor is connected to MCU control unit, by second sampling resistor and the 3rd sampling electricity
Hinder and make MCU control unit gather the electric signal of interleaving inverse excitation isolated variable unit output.
In intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations disclosed by the invention, using input
Rectification filtering unit carries out output ripple DC voltage after rectification and filtering to line voltage, afterwards using PFC boost unit pair
Pulsating dc voltage carries out boosting treatment, in interleaving inverse excitation isolated variable unit, wherein first switch pipe and second switch pipe
Interaction conducting, the second switch pipe cut-off when first switch pipe is turned on, electric current is by the first primary winding, first switch pipe
Loop is formed to front end, the first primary winding starts energy storage；When second switch pipe is turned on, first switch pipe cuts
Only, electric current by the second primary winding, second switch pipe, constitute to front end loop, the second primary winding starts
Energy storage, while the first primary winding is bonded to secondary windings by the first magnetic core of transformer lotus root, then through the 3rd diode to
First electric capacity is charged, and forward voltage is formed on the first electric capacity；Then first switch pipe is turned on again, the cut-off of second switch pipe,
First transformer energy storage, the second transformer secondary output winding is charged by the 4th diode to the second electric capacity, the shape on the second electric capacity
Into negative voltage；Positive negative dc voltage is so formed on dc bus.The first diode, the two or two in foregoing circuit
Pole pipe, first resistor, second resistance, the 3rd electric capacity, the 4th electric capacity are respectively the absorption electricity of first switch pipe and second switch pipe
Road, for the peak voltage for absorbing the first transformer, the leakage inductance of the second transformer is produced, to subtract the voltage stress of switching tube.On
State interleaving inverse excitation isolated location and achieve following beneficial effect：Turned on as a result of interaction so that the current ripples in circuit
It is smaller, using relatively flexibly, while EMI, EMC in circuit disturb smaller, circuit work frequency higher, it is thus possible to improve work(
Rate density, additionally, output voltage can be changed by the primary and secondary turn ratio of the first transformer of change, the second transformer, and then
Realize boosting or be depressured.Based on These characteristics, the present invention achieve can reduce in circuit ripple, circuit structure, drop can be simplified
Low circuit cost, output voltage quality can be improved, and the beneficial effect such as safe and reliable.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams for correcting wave voltage change-over circuit.
Fig. 2 is the circuit theory diagrams of AC sampling unit in the preferred embodiment of the present invention.
Fig. 3 is the circuit theory diagrams of MCU control unit in the preferred embodiment of the present invention.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawings and examples.
The invention discloses a kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, with reference to Fig. 1
Shown in Fig. 3, it is included：
One input rectifying filter unit 10, its input connection power network, for carrying out rectification and filtering to line voltage；
One PFC boost unit 20, is connected to the output end of input rectifying filter unit 10, single for being filtered to input rectifying
The output voltage of unit 10 carries out boost conversion；
One interleaving inverse excitation isolated variable unit 30, includes first switch pipe Q6, second switch pipe Q7, the first transformer
T1, the second transformer T2, the first diode D6, the second diode D5, the 3rd diode D7 and the 4th diode D8, described first
The first end of transformer T1 armature windings is connected to the output end of PFC boost unit 20, the first transformer T1 armature windings
The second end be connected to the drain electrode of first switch pipe Q6, the source electrode of the first switch pipe Q6 is connected to front end ground, described first
The drain electrode of switching tube Q6 is connected to the anode of the first diode D6, and the negative electrode of the first diode D6 passes through first resistor R26
The output end of PFC boost unit 20 is connected to, the first resistor R26 is parallel with the 3rd electric capacity C5, the second transformer T2
The first end of armature winding is connected to the output end of PFC boost unit 20, the second end of the second transformer T2 armature windings
The drain electrode of second switch pipe Q7 is connected to, the source electrode of the second switch pipe Q7 is connected to front end ground, the second switch pipe Q7
Drain electrode be connected to the anode of the second diode D5, the negative electrode of the second diode D5 is connected to PFC by second resistance R27
The output end of boosting unit 20, the second resistance R27 is parallel with the 4th electric capacity C6, the grid of the first switch pipe Q6 and
The grid of two switching tube Q7 be respectively used to access two-way opposite in phase pwm pulse signal, described T1 level of first transformer around
The first end of group is connected to the anode of the 3rd diode D7, and the second end of the first transformer T1 secondary windings is connected to rear end
Ground, the first end of the second transformer T2 secondary windings is connected to rear end ground, and the of the second transformer T2 secondary windings
Two ends are connected to the negative electrode of the 4th diode D8, and the negative electrode of the 3rd diode D7 and the anode of the 4th diode D8 are used as friendship
The output end of wrong flyback isolated variable unit 30；
One DC filter units 40, the negative electrode for including the first electric capacity C7 and the second electric capacity C8, the 3rd diode D7 leads to
Cross the first electric capacity C7 and be connected to rear end ground, the anode of the 4th diode D8 is connected to rear end ground by the second electric capacity C8；
One inversion reversed phase unit 60, is connected to the output end of interleaving inverse excitation isolated variable unit 30, the inversion paraphase list
Unit 60 is used to export alternating current after carrying out inversion conversion to the output voltage of interleaving inverse excitation isolated variable unit 30.
In above-mentioned amendment wave voltage change-over circuit, rectification and filter are carried out to line voltage using input rectifying filter unit 10
Output ripple DC voltage after ripple, carries out boosting treatment using PFC boost unit 20 to pulsating dc voltage afterwards, staggeredly anti-
Swash in isolated variable unit 30, wherein first switch pipe Q6 interacts conducting with second switch pipe Q7, when first switch pipe Q6 conductings
When second switch pipe Q7 cut-off, electric current by the first transformer T1 armature windings, form loop first switch pipe Q6 to front end, the
One transformer T1 armature windings start energy storage；When second switch pipe Q7 is turned on, first switch pipe Q6 cut-offs, electric current is become by second
Depressor T2 armature windings, second switch pipe Q7, front end ground constitute loop, and the second transformer T2 armature windings start energy storage, while
First transformer T1 armature windings are bonded to secondary windings by the first transformer T1 magnetic core lotus roots, then through the 3rd diode D7 to first
Electric capacity C7 is charged, and forward voltage is formed on the first electric capacity C7；Then first switch pipe Q6 is turned on again, and second switch pipe Q7 cuts
Only, the first transformer T1 energy storage, the second transformer T2 secondary windings is charged by the 4th diode D8 to the second electric capacity C8,
Negative voltage is formed on two electric capacity C8；Positive negative dc voltage is so formed on dc bus.In foregoing circuit first
Diode D6, the second diode D5, first resistor R26, second resistance R27, the 3rd electric capacity C5, the 4th electric capacity C6 are respectively first
The absorbing circuit of switching tube Q6 and second switch pipe Q7, for absorbing the leakage inductance generation of the first transformer T1, the second transformer T2
Peak voltage, to subtract the voltage stress of switching tube.Above-mentioned interleaving inverse excitation isolated location achieves following beneficial effect：Due to adopting
With interactive conducting so that current ripples in circuit are smaller, using relatively flexibly, at the same EMI, EMC interference in circuit compared with
Small, circuit work frequency is higher, it is thus possible to improve power density, additionally, by changing the first transformer T1, the second transformer
The primary and secondary turn ratio of T2 can change output voltage, and then realize boosting or be depressured.Based on These characteristics, the present invention is achieved
The ripple in circuit can be reduced, circuit structure can be simplified, circuit cost is reduced, output voltage quality can be improved, and safely may be used
By etc. beneficial effect.
On importation, as shown in figure 1, the input rectifying filter unit 10 includes socket, insurance F2, thunder-lightning
Resistance RV1, common mode inhibition inductance L1, safety electric capacity CX1 and rectifier bridge DB1, the insurance F2 are serially connected with the zero line or live wire of socket
On, the front end of the common mode inhibition inductance L1 is parallel to socket, before the lightning protection resistance RV1 is parallel to common mode inhibition inductance L1
End, the input of the safety electric capacity CX1 and rectifier bridge DB1 is parallel to the rear end of common mode inhibition inductance L1.Further, institute
The output end for stating rectifier bridge DB1 is parallel with filter capacitor C1, is used to filter ripple.
On boosting part, the PFC boost unit 20 includes boost inductance L2, the 3rd switching tube Q5, the first rectification
The front end of diode D1 and the second electrochemical capacitor C2, the boost inductance L2 is connected to the output of input rectifying filter unit 10
End, the rear end of the boost inductance L2 is connected to the drain electrode of the 3rd switching tube Q5, and the source electrode of the 3rd switching tube Q5 connects front end
Ground, the grid of the 3rd switching tube Q5 is used to accessing pwm control signal all the way, the drain electrode connection of the 3rd switching tube Q5 the
The anode of one commutation diode D1, the negative electrode of the first commutation diode D1 as PFC boost unit 20 output end, and should
The negative electrode of the first commutation diode D1 connects the positive pole of the second electrochemical capacitor C2, and the negative pole of the second electrochemical capacitor C2 connects front end ground.
Above-mentioned PFC boost unit 20, when filter capacitor C1 output half-wave alternating voltages are sampled, PFC enters boost mode,
Turn the PF values that AC is intelligently depressured conversion topologies circuit to improve AC, be by the second filtered voltages of electrochemical capacitor C2 after boosting
400V, specific boosting principle is as follows：When 3rd switching tube Q5 is turned on, the boosted inductance L2 of electric current on filter capacitor C1, the
Three switching tube Q5 to GND form loop, boost inductance L2 storage energy；When the 3rd switching tube Q5 is turned off, meeting on boost inductance
The induced electromotive force more much higher than input voltage is formed, induced electromotive force forms unidirectional pulse electricity after carrying out rectification through continued flow tube D1
Pressure is given the second electrochemical capacitor C2 electric capacity and enters filtering again, is filtered into the DC voltage of 400V.And the 3rd switching tube Q5 is basis
The change of input AC amendment ripple that control chip is adopted increases or reduces the ON time of the 3rd switching tube Q5 so that electric current with
Voltage-phase becomes unanimously to improve PF values.
As a kind of preferred embodiment, Fig. 3 is refer to, the present embodiment also includes a MCU control unit 80, and described first opens
Grid, the grid of second switch pipe Q7 and the grid of the 3rd switching tube Q5 for closing pipe Q6 are connected to MCU control unit 80, institute
MCU control unit 80 is stated for distinguishing output pwm signal to first switch pipe Q6, second switch pipe Q7 and the 3rd switching tube Q5,
To control first switch pipe Q6, second switch pipe Q7 and the 3rd switching tube Q5 on off operating modes.Further, the MCU controls are single
Unit 80 includes single-chip microcomputer U1 and its peripheral circuit.
For the ease of monitoring the electric signal of AC, as shown in Fig. 2 the present embodiment also includes an AC sampling unit
70, the AC sampling unit 70 is connected between the input of input rectifying filter unit 10 and MCU control unit 80, described
AC sampling unit 70 is used to gather the voltage of the AC of input rectifying filter unit 10 and feed back to MCU control unit 80.
Further, the AC sampling unit 70 includes two inputs difference of amplifier U9B, the amplifier U9B
The input of input rectifying filter unit 10 is connected to by current-limiting resistance, the output end of the amplifier U9B is connected to MCU controls
Unit processed 80.
For the ease of carrying out Real-time Collection to electric current, is connected between the source electrode and front end ground of the 3rd switching tube Q5
One sampling resistor R2A, the source electrode of the 3rd switching tube Q5 is connected to MCU control unit 80, by first sampling resistor
R2A and make MCU control unit 80 gather the 3rd switching tube Q5 source electrodes electric signal.
Used as a kind of preferred embodiment, in order to be acquired to DC side electric signal, the present embodiment also includes a D/C voltage
Sampling unit 50, the D/C voltage sampling unit 50 includes the second sampling resistor R13 and the 3rd sampling resistor being sequentially connected in series
The front end of R15, the second sampling resistor R13 is connected to the output end of interleaving inverse excitation isolated variable unit 30, and the described 3rd adopts
The rear end of sample resistance R15 is connected to MCU control unit 80, by the second sampling resistor R13 and the 3rd sampling resistor R15
MCU control unit 80 is made to gather the electric signal of the output of interleaving inverse excitation isolated variable unit 30.
On inversion reversed phase unit 60, the inversion reversed phase unit 60 include the 4th switching tube Q2, the 5th switching tube Q4,
The drain electrode of the 3rd electrochemical capacitor C3 and the 4th electrochemical capacitor C4, the 4th switching tube Q2 is connected to the conversion of isolated form double tube positive exciting
The output head anode of device 30, the source electrode of the 4th switching tube Q2 is connected to the drain electrode of the 5th switching tube Q4, the 5th switch
The source electrode of pipe Q4 is connected to the negative pole of output end of isolated form two-transistor forward converter 30, the grid of the 4th switching tube Q2 and
The grid of five switching tube Q4 is respectively used to access the pwm pulse signal of two-way opposite in phase, and the 3rd electrochemical capacitor C3 is just
Pole is connected to the drain electrode of the 4th switching tube Q2, the negative pole connection rear end ground of the 3rd electrochemical capacitor C3, the 3rd electrolysis electricity
The negative pole for holding C3 is also attached to the positive pole of the 4th electrochemical capacitor C4, and the negative pole of the 4th electrochemical capacitor C4 is connected to the 5th switch
The source electrode of pipe Q4, the source electrode of the 4th switching tube Q2 and the negative pole of the 3rd electrochemical capacitor C3 are used as the defeated of inversion reversed phase unit 60
Go out end.
Further, first resistor R17 is connected between the grid and source electrode of the 4th switching tube Q2, the described 5th opens
Second resistance R23 is connected between the grid and source electrode that close pipe Q4.
In above-mentioned inversion reversed phase unit 60, the DC voltage of the output of isolated form two-transistor forward converter 30 is through the 4th switching tube
Q2, load, the 4th electrochemical capacitor C4 form loop powering load and form first half period amendment ripple level；Second half cycle
Phase amendment string level forms loop by the 5th switching tube Q4, load, the 3rd electrochemical capacitor C3, is so formed in load
One complete power frequency amendment alternating current wave pressure.Control chip output pwm signal sent out respectively after drive circuit PWM2H,
PWM2L gives the 4th switching tube Q2, the GATE poles of the 5th switching tube Q4.Phase in inversion phase inverter is with frequency according to control core
The pattern of piece inner setting is operated.The 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 also have the effect of filtering simultaneously.This is inverse
Become circuit control simply, circuit is with low cost only with two metal-oxide-semiconductors.
Intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations disclosed by the invention, it has PF high
Value, is capable of achieving power network and isolates with output end, and security is very high.Output can be automatically adjusted in input full voltage range
Voltage, can fix output frequency, and output voltage is exported with correcting ripple, and automatic shaping function is pressed with to alternating current, additionally,
Circuit of the present invention is simple, easy to control, and containing voltage and current sampling circuit, can anti-surge voltage and electric current.
The above is preferred embodiments of the present invention, is not intended to limit the invention, all in technology model of the invention
Interior done modification, equivalent or improvement etc. are enclosed, be should be included in the range of of the invention protection.
Claims (10)
1. a kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, it is characterised in that include：
One input rectifying filter unit (10), its input connection power network, for carrying out rectification and filtering to line voltage；
One PFC boost unit (20), is connected to the output end of input rectifying filter unit (10), single for being filtered to input rectifying
The output voltage of first (10) carries out boost conversion；
One interleaving inverse excitation isolated variable unit (30), includes first switch pipe (Q6), second switch pipe (Q7), the first transformer
(T1), the second transformer (T2), the first diode (D6), the second diode (D5), the 3rd diode (D7) and the 4th diode
(D8), the first end of the first transformer (T1) armature winding is connected to the output end of PFC boost unit (20), described first
Second end of transformer (T1) armature winding is connected to the drain electrode of first switch pipe (Q6), the source electrode of the first switch pipe (Q6)
Front end ground is connected to, the drain electrode of the first switch pipe (Q6) is connected to the anode of the first diode (D6), the one or two pole
The negative electrode for managing (D6) is connected to the output end of PFC boost unit (20), the first resistor (R26) by first resistor (R26)
The 3rd electric capacity (C5) is parallel with, the first end of the second transformer (T2) armature winding is connected to PFC boost unit (20)
Output end, the second end of the second transformer (T2) armature winding is connected to the drain electrode of second switch pipe (Q7), described second
The source electrode of switching tube (Q7) is connected to front end ground, and the drain electrode of the second switch pipe (Q7) is connected to the sun of the second diode (D5)
Pole, the negative electrode of second diode (D5) is connected to the output end of PFC boost unit (20), institute by second resistance (R27)
State second resistance (R27) and be parallel with the 4th electric capacity (C6), the grid of the first switch pipe (Q6) and second switch pipe (Q7)
Grid is respectively used to access the pwm pulse signal of two-way opposite in phase, the first end of the first transformer (T1) secondary windings
The anode of the 3rd diode (D7) is connected to, the second end of the first transformer (T1) secondary windings is connected to rear end ground, institute
The first end for stating the second transformer (T2) secondary windings is connected to rear end ground, the second of the second transformer (T2) secondary windings
End is connected to the negative electrode of the 4th diode (D8), and the negative electrode of the 3rd diode (D7) and the anode of the 4th diode (D8) are made
It is the output end of interleaving inverse excitation isolated variable unit (30)；
One DC filter units (40), include the first electric capacity (C7) and the second electric capacity (C8), the moon of the 3rd diode (D7)
Pole is connected to rear end ground by the first electric capacity (C7), and the anode of the 4th diode (D8) is connected to by the second electric capacity (C8)
Rear end ground；
One inversion reversed phase unit (60), is connected to the output end of interleaving inverse excitation isolated variable unit (30), the inversion paraphase list
First (60) export alternating current after carrying out inversion conversion for the output voltage to interleaving inverse excitation isolated variable unit (30).
2. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 1, and its feature exists
In the input rectifying filter unit (10) includes socket, insurance (F2), lightning protection resistance (RV1), common mode inhibition inductance
(L1), safety electric capacity (CX1) and rectifier bridge (DB1), the insurance (F2) are serially connected with the zero line of socket or live wire, the common mode
The front end for suppressing inductance (L1) is parallel to socket, and the lightning protection resistance (RV1) is parallel to the front end of common mode inhibition inductance (L1), institute
The input for stating safety electric capacity (CX1) and rectifier bridge (DB1) is parallel to the rear end of common mode inhibition inductance (L1).
3. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 2, and its feature exists
In the output end of the rectifier bridge (DB1) is parallel with filter capacitor (C1).
4. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 1, and its feature exists
In, the PFC boost unit (20) include boost inductance (L2), the 3rd switching tube (Q5), the first commutation diode (D1) and
Second electrochemical capacitor (C2), the front end of the boost inductance (L2) is connected to the output end of input rectifying filter unit (10), institute
The rear end for stating boost inductance (L2) is connected to the drain electrode of the 3rd switching tube (Q5), and the source electrode of the 3rd switching tube (Q5) connects front end
Ground, the grid of the 3rd switching tube (Q5) is used to access pwm control signal all the way, and the drain electrode of the 3rd switching tube (Q5) connects
The anode of the first commutation diode (D1) is connect, the negative electrode of first commutation diode (D1) is used as PFC boost unit (20)
Output end, and first commutation diode (D1) negative electrode connect the second electrochemical capacitor (C2) positive pole, the second electrochemical capacitor
(C2) negative pole connects front end ground.
5. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 4, and its feature exists
In, also include a MCU control unit (80), the grid of the first switch pipe (Q6), the grid of second switch pipe (Q7) and
The grid of the 3rd switching tube (Q5) is connected to MCU control unit (80), and the MCU control unit (80) for exporting respectively
Pwm signal to first switch pipe (Q6), second switch pipe (Q7) and the 3rd switching tube (Q5), with control first switch pipe (Q6),
Second switch pipe (Q7) and the 3rd switching tube (Q5) on off operating mode.
6. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 5, and its feature exists
In the MCU control unit (80) includes single-chip microcomputer (U1) and its peripheral circuit.
7. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 5, and its feature exists
In, an AC sampling unit (70) is also included, the AC sampling unit (70) is connected to input rectifying filter unit (10)
Input and MCU control unit (80) between, the AC sampling unit (70) is for gathering input rectifying filter unit
(10) voltage of AC and MCU control unit (80) is fed back to.
8. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 7, and its feature exists
In the AC sampling unit (70) includes amplifier (U9B), and two inputs of the amplifier (U9B) pass through current limliting respectively
Resistance and be connected to the input of input rectifying filter unit (10), it is single that the output end of the amplifier (U9B) is connected to MCU controls
First (80).
9. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations is based on as claimed in claim 5, and its feature exists
In being connected with the first sampling resistor (R2A), the 3rd switching tube between the source electrode and front end ground of the 3rd switching tube (Q5)
(Q5) source electrode is connected to MCU control unit (80), and MCU control unit (80) is made by first sampling resistor (R2A)
Gather the electric signal of the 3rd switching tube (Q5) source electrode.
10. the intelligent half-bridge amendment wave voltage change-over circuit of PFC interleaving inverse excitations, its feature are based on as claimed in claim 5
It is also to include a D/C voltage sampling unit (50), the D/C voltage sampling unit (50) includes second for being sequentially connected in series
Sampling resistor (R13) and the 3rd sampling resistor (R15), the front end of second sampling resistor (R13) be connected to interleaving inverse excitation every
From the output end of converter unit (30), the rear end of the 3rd sampling resistor (R15) is connected to MCU control unit (80), by
Second sampling resistor (R13) and the 3rd sampling resistor (R15) and make MCU control unit (80) gather interleaving inverse excitation isolation and become
Change the electric signal of unit (30) output.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021428.8A CN106712535A (en) | 2017-01-11 | 2017-01-11 | Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback |
| PCT/CN2017/080982 WO2018129824A1 (en) | 2017-01-11 | 2017-04-19 | Smart half-bridge modified-wave voltage conversion circuit based on pfc interleaved flyback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021428.8A CN106712535A (en) | 2017-01-11 | 2017-01-11 | Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback |
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| CN106712535A true CN106712535A (en) | 2017-05-24 |
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| CN201710021428.8A Pending CN106712535A (en) | 2017-01-11 | 2017-01-11 | Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback |
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| CN (1) | CN106712535A (en) |
| WO (1) | WO2018129824A1 (en) |
Cited By (2)
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| WO2018129825A1 (en) * | 2017-01-11 | 2018-07-19 | 广东百事泰电子商务股份有限公司 | Smart half-bridge sine-wave voltage conversion circuit based on pfc interleaved flyback |
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| CN109521828A (en) * | 2018-12-29 | 2019-03-26 | 惠州华科电器有限公司 | Linear voltage-stabilizing circuit |
| CN111405719B (en) * | 2020-03-27 | 2023-10-27 | 杰华特微电子股份有限公司 | BIFRED converter, control method thereof and LED driving circuit applying BIFRED converter |
| CN112971847B (en) * | 2021-02-09 | 2022-11-25 | 青岛海信医疗设备股份有限公司 | Ultrasonic equipment |
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| WO2018129824A1 (en) | 2018-07-19 |
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