CN206820659U - Intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations - Google Patents
Intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations Download PDFInfo
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- CN206820659U CN206820659U CN201720036126.3U CN201720036126U CN206820659U CN 206820659 U CN206820659 U CN 206820659U CN 201720036126 U CN201720036126 U CN 201720036126U CN 206820659 U CN206820659 U CN 206820659U
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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
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Abstract
The utility model discloses a kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, it includes：Input rectifying filter unit；PFC boost unit；Interleaving inverse excitation isolated variable unit, include first switch pipe, second switch pipe, first transformer, second transformer, first diode, second diode, 3rd diode and the 4th diode, second end of the first primary winding is connected to the drain electrode of first switch pipe, second end of the second primary winding is connected to the drain electrode of second switch pipe, the first end of first transformer secondary output winding is connected to the anode of the 3rd diode, second end of the second transformer secondary output winding is connected to the negative electrode of the 4th diode, the output end of the negative electrode of 3rd diode and the anode of the 4th diode as interleaving inverse excitation isolated variable unit；DC filter units；Inversion reversed phase unit.The utility model can reduce ripple in circuit, can simplify circuit structure and reduce circuit cost.
Description
Technical field
Voltage conversion circuit is the utility model is related to, more particularly to a kind of intelligent half-bridge based on PFC interleaving inverse excitations is repaiied
Positive wave 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 just most of meaningful formula equipment Market is electric for the topology of non-isolation type by current AC-AC
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.In addition, there is circuit structure complexity, response speed in existing amendment wave voltage change-over circuit
The defects of degree is slow, cost is higher.
Utility model content
The technical problems to be solved in the utility model is, in view of the shortcomings of the prior art, there is provided one kind can reduce circuit
In ripple, circuit structure can be simplified, circuit cost is reduced, can improve output voltage quality, it is and safe and reliable based on PFC
The intelligent half-bridge amendment wave voltage change-over circuit of interleaving inverse excitation.
In order to solve the above technical problems, the utility model adopts the following technical scheme that.
A kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, it includes：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, for carrying out boost conversion to the output voltage of 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 are connected to the drain electrode of first switch pipe, and described first opens
Close the source electrode of pipe with being connected to front end, the drain electrode of the first switch pipe is connected to the anode of the first diode, and 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 with being connected to front end, 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 are 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 3rd diode, with being connected to rear end, second transformer is secondary at the second end of the first transformer secondary output winding
With being connected to rear end, the second end of the second transformer secondary output winding is connected to the moon of the 4th diode to the first end of level winding
Pole, the output end of the negative electrode of the 3rd diode and the anode of the 4th diode as interleaving inverse excitation isolated variable unit；One
DC filter units, include the first electric capacity and the second electric capacity, and the negative electrode of the 3rd diode is by the first capacitance connection in rear
End ground, the anode of the 4th diode by the second capacitance connection in rear end；One inversion reversed phase unit, it 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 or live wire of socket, and the front end of the common mode inhibition inductance is parallel to slotting
Seat, the lightning protection resistance are 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 are 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, with connecing front end, the grid of the 3rd switching tube is used for the source electrode of the 3rd switching tube
Pwm control signal, the drain electrode of the 3rd switching tube connect the anode of the first commutation diode, first rectification all the way for access
Output end of the negative electrode of diode as PFC boost unit, and the negative electrode of first commutation diode connects the second electrochemical capacitor
Positive pole, the negative pole of the second electrochemical capacitor is with connecing front end.
Preferably, also include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and
The grid of 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 pass through current limliting electricity respectively
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 be 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 the electric signal of MCU control unit collection interleaving inverse excitation isolated variable unit output.
In intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations disclosed in the utility model, utilize
Input rectifying filter unit carries out output ripple DC voltage after rectification and filtering to line voltage, utilizes PFC boost list afterwards
Member carries out boosting processing to pulsating dc voltage, and in interleaving inverse excitation isolated variable unit, wherein first switch pipe is opened with second
Pipe interaction conducting is closed, second switch pipe ends when first switch pipe turns on, and electric current is opened by the first primary winding, first
Close pipe and to front end form loop, the first primary winding starts energy storage；When second switch pipe turns on, first switch pipe
Cut-off, electric current by the second primary winding, second switch pipe, form to front end loop, the second primary winding is opened
Beginning 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
Charged to the first electric capacity, forward voltage is formed on the first electric capacity；Then first switch pipe is turned on again, and second switch pipe is cut
Only, the first transformer energy storage, the second transformer secondary output winding is charged by the 4th diode to the second electric capacity, on the second electric capacity
Form negative voltage；Positive negative dc voltage is so formed on dc bus.The first diode in foregoing circuit, second
Diode, first resistor, second resistance, the 3rd electric capacity, the 4th electric capacity are respectively the absorption of first switch pipe and second switch pipe
Circuit, for absorbing peak voltage caused by the leakage inductance of the first transformer, the second transformer, to subtract the voltage stress of switching tube.
Above-mentioned interleaving inverse excitation isolated location achieves following beneficial effect：Turned on as a result of interaction so that the electric current line in circuit
Ripple is smaller, using relatively flexibly, while EMI, EMC interference in circuit are smaller, circuit work frequency is higher, it is thus possible to improves
Power density, in addition, output voltage can be changed by the primary and secondary turn ratio of the first transformer of change, the second transformer, enter
And realize boosting or decompression.Based on These characteristics, the utility model achieves the ripple that can be reduced in circuit, can simplify circuit knot
Structure, reduce 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 of amendment wave voltage change-over circuit.
Fig. 2 is the circuit theory diagrams of AC sampling unit in the utility model preferred embodiment.
Fig. 3 is the circuit theory diagrams of MCU control unit in the utility model preferred embodiment.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and examples.
The utility model discloses a kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, knot
Close shown in Fig. 1 to Fig. 3, it includes：
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, the output end of input rectifying filter unit 10 is connected to, it is single for being filtered to input rectifying
The output voltage of member 10 carries out boost conversion；
One interleaving inverse excitation isolated variable unit 30, include 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 first switch pipe Q6 drain electrode, the source electrode of the first switch pipe Q6 with being connected to front end, described first
Switching tube Q6 drain electrode is connected to the first diode D6 anode, 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
Be connected to second switch pipe Q7 drain electrode, the source electrode of the second switch pipe Q7 with being connected to front end, the second switch pipe Q7
Drain electrode be connected to the second diode D5 anode, 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 are parallel with the 4th electric capacity C6, the grid of the first switch pipe Q6 and
Two switching tube Q7 grid 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 3rd diode D7 anode, 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 with being connected to rear end, the of the second transformer T2 secondary windings
Two ends are connected to the 4th diode D8 negative electrode, and the negative electrode of the 3rd diode D7 and the 4th diode D8 anode are as friendship
The output end of wrong flyback isolated variable unit 30；
One DC filter units 40, include the first electric capacity C7 and the second electric capacity C8, and the negative electrode of the 3rd diode D7 leads to
Cross the first electric capacity C7 with being connected to rear end, the anode of the 4th diode D8 by the second electric capacity C8 with being connected to rear end；
One inversion reversed phase unit 60, it is connected to the output end of interleaving inverse excitation isolated variable unit 30, the inversion paraphase list
Member 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, boosting processing is carried out to pulsating dc voltage using PFC boost unit 20 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 is turned on
When second switch pipe Q7 cut-off, electric current to front end forms loop by the first transformer T1 armature windings, first switch pipe Q6, 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, loop is formed to front end, the second transformer T2 armature windings start energy storage, simultaneously
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 is cut
Only, the first transformer T1 energy storage, the second transformer T2 secondary windings are 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.First in foregoing circuit
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
Switching tube Q6 and second switch pipe Q7 absorbing circuit, for absorbing the first transformer T1, the second transformer T2 leakage inductance generation
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, while EMI, EMC interference in circuit compared with
It is small, circuit work frequency is higher, it is thus possible to improve power density, in addition, pass through change the first transformer T1, the second transformer
T2 primary and secondary turn ratio can change output voltage, and then realize boosting or decompression.Based on These characteristics, the utility model takes
The ripple that can be reduced in circuit was obtained, circuit structure can be simplified, circuit cost is reduced, output voltage quality can be improved, and was pacified
The beneficial effect such as reliable entirely.
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 are parallel to common mode inhibition inductance L1 rear end.Further, institute
The output end for stating rectifier bridge DB1 is parallel with filter capacitor C1, to filter out ripple.
On part of boosting, the PFC boost unit 20 includes boost inductance L2, the 3rd switching tube Q5, the first rectification
Diode D1 and the second electrochemical capacitor C2, the boost inductance L2 front end are connected to the output of input rectifying filter unit 10
End, the rear end of the boost inductance L2 are connected to the 3rd switching tube Q5 drain electrode, and the source electrode of the 3rd switching tube Q5 connects front end
Ground, the grid of the 3rd switching tube Q5 are used to accessing pwm control signal all the way, the drain electrode connection of the 3rd switching tube Q5 the
One commutation diode D1 anode, the output end of the negative electrode of the first commutation diode D1 as PFC boost unit 20, and should
First commutation diode D1 negative electrode connects the second electrochemical capacitor C2 positive pole, and the second electrochemical capacitor C2 negative pole is with connecing front end.
Above-mentioned PFC boost unit 20, when sampling filter capacitor C1 output half-wave alternating voltages, PFC enters boost mode,
To improve the PF values that AC turns AC and is intelligently depressured conversion topologies circuit, it is by the second filtered voltages of electrochemical capacitor C2 after boosting
400V, specific boosting principle are 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 continued flow tube D1 carries out rectification
Pressure gives the second electrochemical capacitor C2 electric capacity and enters filtering again, is filtered into 400V DC voltage.And the 3rd switching tube Q5 is basis
Input AC amendment ripple that control chip is adopted changes to increase or reduce the 3rd switching tube Q5 ON time 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, second switch pipe Q7 grid and the 3rd switching tube Q5 grid for closing pipe Q6 are connected to MCU control unit 80, institute
State MCU control unit 80 and be used to distinguish 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
Member 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 feeds back to MCU control unit 80.
Further, the AC sampling unit 70 includes amplifier U9B, the amplifier U9B two inputs difference
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 80 processed.
For the ease of being gathered in real time 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.
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 include the second sampling resistor R13 and the 3rd sampling resistor being sequentially connected in series
R15, the second sampling resistor R13 front end are connected to the output end of interleaving inverse excitation isolated variable unit 30, and the described 3rd adopts
Sample resistance R15 rear end 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,
3rd electrochemical capacitor C3 and the 4th electrochemical capacitor C4, the 4th switching tube Q2 drain electrode are 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 are connected to the 5th switching tube Q4 drain electrode, the 5th switch
Pipe Q4 source electrode 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
Five switching tube Q4 grid 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 4th switching tube Q2 drain electrode, and with connecting rear end, the 3rd electrolysis is electric for the negative pole of the 3rd electrochemical capacitor C3
The negative pole for holding C3 is also attached to the 4th electrochemical capacitor C4 positive pole, and the negative pole of the 4th electrochemical capacitor C4 is connected to the 5th switch
Pipe Q4 source electrode, the source electrode of the 4th switching tube Q2 and the 3rd electrochemical capacitor C3 negative pole are 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 pass pipe Q4 grid and source electrode.
In above-mentioned inversion reversed phase unit 60, the DC voltage that isolated form two-transistor forward converter 30 exports 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 corrects string level and 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 is to the 4th switching tube Q2, the 5th switching tube Q4 GATE poles.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 filtered simultaneously.This is inverse
Become circuit control simply, circuit is only cheap with two metal-oxide-semiconductors, cost.
Intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations disclosed in the utility model, it has
High PF values, power network can be achieved and isolate with output end, and security is very high.It is able to can be automatically adjusted in input full voltage range
Output voltage, output frequency can be fixed, and output voltage is exported with correcting ripple, and automatic shaping function is pressed with to alternating current,
In addition, the utility model circuit is simple, it is easy to control, and contain voltage and current sampling circuit, can anti-surge voltage and electricity
Stream.
Simply the utility model preferred embodiment described above, is not limited to the utility model, all in this practicality
Modification, equivalent substitution or improvement made in new technical scope etc., should be included in the model that the utility model is protected
In enclosing.
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, its input connection power network, for carrying out rectification and filtering to line voltage；
One PFC boost unit, the output end of input rectifying filter unit is connected to, for the output to input rectifying filter unit
Voltage carries out boost conversion；
One interleaving inverse excitation isolated variable unit, include first switch pipe, second switch pipe, the first transformer, the second transformer,
First diode, the second diode, the 3rd diode and the 4th diode, the first end of the first primary winding connect
The output end of PFC boost unit is connected to, the second end of the first primary winding is connected to the drain electrode of first switch pipe,
With being connected to front end, the drain electrode of the first switch pipe is connected to the anode of the first diode to the source electrode of the first switch pipe,
The negative electrode of first diode is connected to the output end of PFC boost unit by first resistor, and the first resistor is parallel with
3rd electric capacity, the first end of the second primary winding are connected to the output end of PFC boost unit, second transformation
Second end of device armature winding is connected to the drain electrode of second switch pipe, the source electrode of the second switch pipe with being connected to front end, institute
The drain electrode for stating second switch pipe is connected to the anode of the second diode, and the negative electrode of second diode is connected by second resistance
In the output end of PFC boost unit, the second resistance is parallel with the 4th electric capacity, and the grid of the first switch pipe and second open
Close pipe grid be respectively used to access two-way opposite in phase pwm pulse signal, the first of the first transformer secondary output winding
End is connected to the anode of the 3rd diode, the second end of the first transformer secondary output winding with being connected to rear end, described second
With being connected to rear end, the second end of the second transformer secondary output winding is connected to the four or two to the first end of transformer secondary output winding
The negative electrode of pole pipe, the negative electrode of the 3rd diode and the anode of the 4th diode are as the defeated of interleaving inverse excitation isolated variable unit
Go out end；
One DC filter units, include the first electric capacity and the second electric capacity, and the negative electrode of the 3rd diode is connected by the first electric capacity
With being connected to rear end, the anode of the 4th diode by the second capacitance connection in rear end；
One inversion reversed phase unit, is connected to the output end of interleaving inverse excitation isolated variable unit, and the inversion reversed phase unit is used for pair
The output voltage of interleaving inverse excitation isolated variable unit exports alternating current after carrying out inversion conversion.
2. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 1
In the input rectifying filter unit includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety electric capacity and rectification
Bridge, the insurance are serially connected with the zero line or live wire of socket, and the front end of the common mode inhibition inductance is parallel to socket, the lightning protection
Resistor coupled in parallel is parallel to common mode inhibition inductance in the front end of common mode inhibition inductance, the input of the safety electric capacity and rectifier bridge
Rear end.
3. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 2
In the output end of the rectifier bridge is parallel with filter capacitor.
4. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 1
In the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and the second electrochemical capacitor, described
The front end of boost inductance is connected to the output end of input rectifying filter unit, and the rear end of the boost inductance is connected to the 3rd switch
The drain electrode of pipe, with connecing front end, the grid of the 3rd switching tube is used to access PWM all the way and controlled the source electrode of the 3rd switching tube
Signal, the anode of drain electrode the first commutation diode of connection of the 3rd switching tube, the negative electrode of first commutation diode are made
For the output end of PFC boost unit, and the negative electrode of first commutation diode connects the positive pole of the second electrochemical capacitor, the second electrolysis
The negative pole of electric capacity is with connecing front end.
5. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 4
In also including a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and the 3rd switching tube
Grid is connected to MCU control unit, and the MCU control unit is used to distinguish output pwm signal to first switch pipe, second
Switching tube and the 3rd switching tube, to control first switch pipe, second switch pipe and the 3rd switching tube on off operating mode.
6. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 5
In the MCU control unit includes single-chip microcomputer and its peripheral circuit.
7. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 5
In also including an AC sampling unit, the AC sampling unit is connected to the input and MCU of input rectifying filter unit
Between control unit, the AC sampling unit is used to gather the voltage of input rectifying filter unit AC and feeds back to MCU
Control unit.
8. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 7
Include amplifier in, the AC sampling unit, two inputs of the amplifier are connected to defeated by current-limiting resistance respectively
Enter the input of rectification filtering unit, the output end of the amplifier is connected to MCU control unit.
9. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations, its feature exist as claimed in claim 5
In being connected with the first sampling resistor between the source electrode and front end ground of the 3rd switching tube, the source electrode of the 3rd switching tube connects
MCU control unit is connected to, makes MCU control unit gather the telecommunications of the 3rd switching tube source electrode by first sampling resistor
Number.
10. the intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations as claimed in claim 5, its feature
It is, also include a D/C voltage sampling unit, the D/C voltage sampling unit includes the second sampling resistor being sequentially connected in series
With the 3rd sampling resistor, the front end of second sampling resistor is connected to the output end of interleaving inverse excitation isolated variable unit, described
The rear end of 3rd sampling resistor is connected to MCU control unit, and MCU is made by second sampling resistor and the 3rd sampling resistor
The electric signal of control unit collection interleaving inverse excitation isolated variable unit output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720036126.3U CN206820659U (en) | 2017-01-11 | 2017-01-11 | Intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720036126.3U CN206820659U (en) | 2017-01-11 | 2017-01-11 | Intelligent half-bridge amendment wave voltage change-over circuit based on PFC interleaving inverse excitations |
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| CN206820659U true CN206820659U (en) | 2017-12-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712535A (en) * | 2017-01-11 | 2017-05-24 | 广东百事泰电子商务股份有限公司 | Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback |
| CN113507216A (en) * | 2021-06-25 | 2021-10-15 | 科陆国际技术有限公司 | Isolation circuit, switching power supply and electronic equipment |
-
2017
- 2017-01-11 CN CN201720036126.3U patent/CN206820659U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712535A (en) * | 2017-01-11 | 2017-05-24 | 广东百事泰电子商务股份有限公司 | Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback |
| CN113507216A (en) * | 2021-06-25 | 2021-10-15 | 科陆国际技术有限公司 | Isolation circuit, switching power supply and electronic equipment |
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Denomination of utility model: Intelligent half bridge correction wave voltage conversion circuit based on PFC interleaved flyback Effective date of registration: 20231227 Granted publication date: 20171229 Pledgee: Agricultural Bank of China Limited Zijin County Sub branch Pledgor: Heyuan baishitai Technology Co.,Ltd. Registration number: Y2023980074827 |