CN206620057U - Intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge - Google Patents
Intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge Download PDFInfo
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- CN206620057U CN206620057U CN201720005369.0U CN201720005369U CN206620057U CN 206620057 U CN206620057 U CN 206620057U CN 201720005369 U CN201720005369 U CN 201720005369U CN 206620057 U CN206620057 U CN 206620057U
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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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- 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 discloses a kind of intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge, it includes：Input block；PFC boost unit；Full-bridge isolated variable unit, include first switch pipe, second switch pipe, 6th switching tube, 7th switching tube, transformer, first diode, second diode and filter inductance, the source electrode of 6th switching tube is connected to the first end of primary winding, the drain electrode of the second switch pipe is connected to the second end of primary winding, the source electrode of the first switch pipe is connected to the second end of primary winding, the drain electrode of 7th switching tube is connected to the first end of primary winding, the centre tap of the transformer secondary output winding is with being connected to rear end；Inversion reversed phase unit.The utility model can improve PF values and output voltage quality.
Description
Technical field
The utility model is related to voltage conversion circuit, more particularly to a kind of intelligent amendment based on PFC, full-bridge and half-bridge
Wave voltage change-over circuit.
Background technology
In the prior art, it is otherwise known as travelling insert row by the AC intelligent boost-buck conversion equipments for turning AC, in the device, voltage
Change-over circuit is its Key Circuit, be it is a kind of can realize AC-AC conversion circuit, can AC-AC conversion in realize buck
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.
Utility model content
The technical problems to be solved in the utility model is, can improve voltage there is provided one kind in view of the shortcomings of the prior art
The PF values of conversion equipment, output voltage quality can be improved, and safe and reliable be repaiied based on the intelligent of PFC, full-bridge and half-bridge
Positive wave voltage conversion circuit.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that.
A kind of intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge, it includes：One input block,
For providing DC voltage；One PFC boost unit, is connected to the output end of input block, for the output electricity to input block
Pressure carries out boost conversion；One full-bridge isolated variable unit, includes first switch pipe, second switch pipe, the 6th switching tube, the 7th
Switching tube, transformer, the first diode, the second diode and filter inductance, the drain electrode of the 6th switching tube are connected to PFC liters
The output end of unit is pressed, the source electrode of the 6th switching tube is connected to the first end of primary winding, the second switch
The drain electrode of pipe is connected to the second end of primary winding, the source electrode of the second switch pipe with being connected to front end, described
The drain electrode of one switching tube is connected to the output end of PFC boost unit, and the source electrode of the first switch pipe is connected to primary
Second end of winding, the drain electrode of the 7th switching tube is connected to the first end of primary winding, the 7th switching tube
Source electrode with being connected to front end, grid, the grid of second switch pipe, the grid of the 6th switching tube and of the first switch pipe
The grid of seven switching tubes is respectively used to access pwm pulse signal, and the centre tap of the transformer secondary output winding is connected to rear end
Ground, the first end of the transformer secondary output winding is connected to the anode of the first diode, and the negative electrode of first diode passes through
First capacitance connection is in rear end, and the negative electrode of first diode is connected to the front end of filter inductance, the transformer secondary output
Second end of winding is connected to the negative electrode of the second diode, and the anode of second diode is by the second capacitance connection in rear end
The anode of ground, the rear end of the filter inductance and the second diode as full-bridge isolated variable unit output end；One inversion is fallen
Facies unit, is connected to the output end of full-bridge isolated variable unit, and the inversion reversed phase unit is used for full-bridge isolated variable unit
Output voltage carry out inversion conversion after export alternating current.
Preferably, the input block includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety electric capacity and whole
Bridge is flowed, the insurance is serially connected with the zero line of socket or live wire, the front end of the common mode inhibition inductance is parallel to socket, described anti-
Thunder and lightning hinders the front end for being parallel to common mode inhibition inductance, and the input of the safety electric capacity and rectifier bridge is parallel to common mode inhibition electricity
The rear end of sense, 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 block, and the rear end of the boost inductance is connected to
The drain electrode of three switching tubes, with connecing front end, the grid of the 3rd switching tube is used to access all the way the source electrode of the 3rd switching tube
Pwm control signal, the anode of drain electrode the first commutation diode of connection of the 3rd switching tube, first commutation diode
Negative electrode is as 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
The negative pole of two electrochemical capacitors is with connecing front end.
Preferably, a MCU control unit is also included, the grid of the first switch pipe, the grid of second switch pipe,
The grid of the grid of three switching tubes, the grid of the 6th switching tube and the 7th switching tube is connected to MCU control unit, described
MCU control unit be used for distinguish output pwm signal to first switch pipe, second switch pipe, the 3rd switching tube, the 6th switching tube and
7th switching tube, to control the logical of first switch pipe, second switch pipe, the 3rd switching tube, the 6th switching tube and the 7th switching tube
Disconnected state.
Preferably, an AC sampling unit is also included, the AC sampling unit is connected to the input of input block
Between MCU control unit, the AC sampling unit is used to gather the voltage of input block AC and feeds back to MCU controls
Unit.
Preferably, the AC sampling unit includes amplifier, and two inputs of the amplifier pass through current limliting electricity respectively
The input of input rectifying filter unit is hindered and is connected to, 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, the second sampling resistor and the 3rd sampling resistor being sequentially connected in series, second sampling resistor are also included
Front end be connected to the output end of the full-bridge isolated variable unit, the rear end of the 3rd sampling resistor is connected to MCU controls
Unit, makes MCU control unit gather the full-bridge isolated variable list by second sampling resistor and the 3rd sampling resistor
The electric signal of member output.
Preferably, the inversion reversed phase unit includes the 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor and the 4th
Electrochemical capacitor, the drain electrode of the 4th switching tube is connected to the output head anode of full-bridge isolated variable unit, the 4th switch
The source electrode of pipe is connected to the drain electrode of the 5th switching tube, and the source electrode of the 5th switching tube is connected to the defeated of full-bridge isolated variable unit
Go out and hold negative pole, the grid of the 4th switching tube and the grid of the 5th switching tube are respectively used to access the PWM of two-way opposite in phase
Pulse signal, the positive pole of the 3rd electrochemical capacitor is connected to the drain electrode of the 4th switching tube, the negative pole of the 3rd electrochemical capacitor
With connecting rear end, the negative pole of the 3rd electrochemical capacitor is also attached to the positive pole of the 4th electrochemical capacitor, the 4th electrochemical capacitor
Negative pole be connected to the source electrode of the 5th switching tube, the source electrode of the 4th switching tube and the negative pole of the 3rd electrochemical capacitor are used as inversion
The output end of reversed phase unit.
Preferably, first resistor is connected between the grid and source electrode of the 4th switching tube, the 5th switching tube
Second resistance is connected between grid and source electrode.
In intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge disclosed in the utility model, utilize
The DC voltage that PFC boost unit is exported to input block carries out boosting processing, exports afterwards to full-bridge isolated variable unit,
In full-bridge isolated variable unit, when first switch pipe and the conducting of the 7th switching tube, electric current is by first switch pipe, primary
Coil, the 7th switching tube form loop to front end, and the voltage of primary winding is lower just upper negative, then passes through transformer
Magnetic core lotus root is bonded to transformer secondary output, and the second diode sends the second capacitor filtering to by backward voltage, the shape on the second electric capacity
The DC voltage born under Cheng Shangzheng；When second switch pipe and the 6th switching tube are turned on, electric current is as at the beginning of second switch pipe, transformer
Level coil, the 6th switching tube form loop to front end, and primary winding voltage is upper just lower negative, then passes through transformer
Magnetic core lotus root is bonded to transformer secondary output, is at this moment forward voltage by the voltage of the first diode, and is sent to the first electric capacity, the
Just lower negative DC voltage, is so formed generating positive and negative voltage on dc bus on being formed on one electric capacity.Wherein, the first electricity
Hold, the second electric capacity and filter inductance constitute filter circuit.And by changing the turn ratio of transformer primary and secondary, output can be adjusted
The height of voltage, and then realize boosting or decompression conversion.Based on said structure, the utility model not only realize voltage every
From transmission, and then the PF values of step-up/down conversion equipment are improved, also improve output voltage quality so that voltage conversion process
It is more safe and reliable.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model 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 amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge, with reference to
Shown in Fig. 1 to Fig. 3, it includes：
One input block 10, for providing DC voltage；
One PFC boost unit 20, is connected to the output end of input block 10, enters for the output voltage to input block 10
Row boost conversion；
One full-bridge isolated variable unit 30, includes first switch pipe Q6, second switch pipe Q7, the 6th switching tube Q8,
Seven switching tube Q9, transformer T1, the first diode D5, the second diode D6 and filter inductance L3, the 6th switching tube Q8's
Drain electrode is connected to the output end of PFC boost unit 20, and the source electrode of the 6th switching tube Q8 is connected to transformer T1 armature windings
First end, the drain electrode of the second switch pipe Q7 is connected to the second end of transformer T1 armature windings, the second switch pipe
With being connected to front end, the drain electrode of the first switch pipe Q6 is connected to the output end of PFC boost unit 20, described to Q7 source electrode
One switching tube Q6 source electrode is connected to the second end of transformer T1 armature windings, and the drain electrode of the 7th switching tube Q9 is connected to change
The first end of depressor T1 armature windings, the source electrode of the 7th switching tube Q9 with being connected to front end, the first switch pipe Q6's
Grid, second switch pipe Q7 grid, the 6th switching tube Q8 grid and the 7th switching tube Q9 grid are respectively used to access PWM
Pulse signal, the centre tap of the transformer T1 secondary windings with being connected to rear end, the of the transformer T1 secondary windings
One end is connected to the first diode D5 anode, and the negative electrode of the first diode D5 is connected to rear end by the first electric capacity C7
Ground, and first diode D5 negative electrode is connected to filter inductance L3 front end, the second end of the transformer T1 secondary windings
Be connected to the second diode D6 negative electrode, the anode of the second diode D6 by the second electric capacity C8 with being connected to rear end, institute
Filter inductance L3 rear end and the second diode D6 anode are stated as the output end of full-bridge isolated variable unit 30；
One inversion reversed phase unit 40, is connected to the output end of full-bridge isolated variable unit 30, the inversion reversed phase unit 40
Alternating current is exported after carrying out inversion conversion for the output voltage to full-bridge isolated variable unit 30.
In above-mentioned amendment wave voltage change-over circuit, the DC voltage exported using PFC boost unit 20 to input block 10
Boosting processing is carried out, is exported afterwards to full-bridge isolated variable unit 30, in full-bridge isolated variable unit 30, when first switch pipe
During Q6 and the 7th switching tube Q9 conductings, electric current is by first switch pipe Q6, transformer T1 primary coils, the 7th switching tube Q9 to front end
Ground formation loop, the voltage of transformer T1 armature windings is lower just upper negative, is then bonded to transformer by transformer T1 magnetic core lotus roots
Secondary, the second diode D6 sends the second electric capacity C8 to by backward voltage and filtered, and forms just lower negative on the second electric capacity C8
DC voltage；When second switch pipe Q7 and the 6th switching tube Q8 is turned on, electric current is primary by second switch pipe Q7, transformer T1
Coil, the 6th switching tube Q8 form loop to front end, and transformer T1 primary winding voltages are upper just lower negative, then pass through transformation
Device T1 magnetic core lotus roots are bonded to transformer secondary output, are at this moment forward voltage by the first diode D5 voltage, and be sent to the first electricity
Hold C7, just lower negative DC voltage is formed on the first electric capacity C7, generating positive and negative voltage is so formed on dc bus.Its
In, the first electric capacity C7, the second electric capacity C8 and filter inductance L3 composition filter circuits.And by changing the circle of transformer T1 primary and secondaries
Number ratio, can adjust the height of output voltage, and then realize boosting or decompression conversion.Based on said structure, the utility model
The isolation transmission of voltage is not only realized, and then improves the PF values of step-up/down conversion equipment, output voltage matter is also improved
Amount so that voltage conversion process is more safe and reliable.
On importation, as shown in figure 1, the input block 10 includes socket, insures F2, lightning protection resistance RV1, is total to
Mould suppresses inductance L1, safety electric capacity CX1 and rectifier bridge DB1, and the insurance F2 is serially connected with the zero line of socket or live wire, described common
The front end that mould suppresses inductance L1 is parallel to socket, and the lightning protection resistance RV1 is parallel to common mode inhibition inductance L1 front end, the peace
Rule electric capacity CX1 and rectifier bridge DB1 input is parallel to common mode inhibition inductance L1 rear end, the output of the rectifier bridge DB1
End is parallel with filter capacitor C1.
In the present embodiment, the PFC boost unit 20 includes boost inductance L2, the 3rd switching tube Q5, the first rectification two
Pole pipe D1 and the second electrochemical capacitor C2, the boost inductance L2 front end are connected to the output end of input block 10, the boosting
Inductance L2 rear end is connected to the 3rd switching tube Q5 drain electrode, the source electrode of the 3rd switching tube Q5 with connecing front end, the described 3rd
Switching tube Q5 grid is used to access pwm control signal all the way, drain electrode connection the first rectification two pole of the 3rd switching tube Q5
Pipe D1 anode, the negative electrode of the first commutation diode D1 is used as the output end of PFC boost unit 20, and first rectification two
Pole pipe D1 negative electrode connects the second electrochemical capacitor C2 positive pole, and the second electrochemical capacitor C2 negative pole is with connecing front end.
In above-mentioned PFC boost unit 20, if filter capacitor C1 exports half-wave alternating voltage, PFC enters boost mode, to carry
High AC turns the PF values that AC is intelligently depressured conversion topologies circuit, is 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 formation 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 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, the 3rd switching tube Q5 grid, the 6th switching tube Q8 grid and the 7th for closing pipe Q6 are opened
The grid for closing pipe Q9 is connected to MCU control unit 80, and the MCU control unit 80 is used to distinguishing output pwm signal to the
One switching tube Q6, second switch pipe Q7, the 3rd switching tube Q5, the 6th switching tube Q8 and the 7th switching tube Q9, to control first to open
Close pipe Q6, second switch pipe Q7, the 3rd switching tube Q5, the 6th switching tube Q8 and the 7th switching tube Q9 on off operating mode.
For the ease of monitoring the electric signal of AC, Fig. 2 is refer to, also includes an AC sampling unit 70, it is described to hand over
Stream sampling unit 70 is connected between the input of input block 10 and MCU control unit 80, and the AC sampling unit 70 is used
In collection the AC of input block 10 voltage and feed 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, which also includes, to be sequentially connected in series
The second sampling resistor R13 and the 3rd sampling resistor R15, the front end of the second sampling resistor R13 be connected to the full-bridge 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 described
Two sampling resistor R13 and the 3rd sampling resistor R15 and make MCU control unit 80 gather the full-bridge isolated variable unit 30 and export
Electric signal.
On Converting Unit, as shown in figure 1, the inversion reversed phase unit 40 includes the 4th switching tube Q2, the 5th switch
Pipe Q4, the 3rd electrochemical capacitor C3 and the 4th electrochemical capacitor C5, the drain electrode of the 4th switching tube Q2 are connected to full-bridge isolated variable
The output head anode of unit 30, the source electrode of the 4th switching tube Q2 is connected to the 5th switching tube Q4 drain electrode, and the described 5th opens
The source electrode for closing pipe Q4 is connected to the negative pole of output end of full-bridge isolated variable unit 30, the grid and the 5th of the 4th switching tube Q2
Switching tube Q4 grid is respectively used to access the pwm pulse signal of two-way opposite in phase, the positive pole of the 3rd electrochemical capacitor C3
It is connected to the 4th switching tube Q2 drain electrode, the negative pole connection rear end of the 3rd electrochemical capacitor C3, the 3rd electrochemical capacitor
C3 negative pole is also attached to the 4th electrochemical capacitor C5 positive pole, and the negative pole of the 4th electrochemical capacitor C5 is connected to the 5th switching tube
Q4 source electrode, the source electrode of the 4th switching tube Q2 and the 3rd electrochemical capacitor C3 negative pole as inversion reversed phase unit 40 output
End.First resistor R17, the 5th switching tube Q4 are further connected between the grid and source electrode of the 4th switching tube Q2
Grid and source electrode between be connected with second resistance R23.
In above-mentioned inversion reversed phase unit 40, full-bridge isolated variable unit 30 export voltage through the 4th switching tube Q2, load,
4th electrochemical capacitor C5 formation loop powering loads formation, first half period amendment ripple level；Second half period corrects string
Level is so formed one completely by the 5th switching tube Q4, load, the 3rd electrochemical capacitor C3 formation loop in load
Power frequency amendment alternating current wave pressure.The pwm signal that control chip is exported sends out PWM2H, PWM2L to the respectively after drive circuit
Four switching tube Q2, the 5th switching tube Q4 GATE poles.Phase in inversion phase inverter and frequency inside control chip according to setting
Fixed pattern is operated.The 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C5 also have the effect of filtering simultaneously, can be with filtered electrical
Feel L3 composition filter circuits.The inverter circuit is simple in construction, and circuit is with low cost only with two metal-oxide-semiconductors.
Intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge disclosed in the utility model, it has height
PF values, can be achieved power network and isolate with output end, and security is very high.It is able to can be automatically adjusted in input full voltage range defeated
Go out voltage, output frequency can be fixed, and output voltage is exported with correcting ripple, and automatic shaping function is pressed with to alternating current, this
Outside, the utility model circuit is simple, easy to control, and containing voltage and current sampling circuit, can anti-surge voltage and electric current.
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 amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge, it is characterised in that include：
One input block, for providing DC voltage；
One PFC boost unit, is connected to the output end of input block, and carrying out boosting for the output voltage to input block turns
Change；
One full-bridge isolated variable unit, includes first switch pipe, second switch pipe, the 6th switching tube, the 7th switching tube, transformation
Device, the first diode, the second diode and filter inductance, the drain electrode of the 6th switching tube are connected to the defeated of PFC boost unit
Go out end, the source electrode of the 6th switching tube is connected to the first end of primary winding, and the drain electrode of the second switch pipe connects
Be connected to the second end of primary winding, the source electrode of the second switch pipe with being connected to front end, the first switch pipe
Drain electrode is connected to the output end of PFC boost unit, and the source electrode of the first switch pipe is connected to the second of primary winding
End, the drain electrode of the 7th switching tube is connected to the first end of primary winding, the source electrode connection of the 7th switching tube
In front end, the grid of the first switch pipe, the grid of second switch pipe, the grid of the 6th switching tube and the 7th switching tube
Grid be respectively used to access pwm pulse signal, the centre tap of the transformer secondary output winding with being connected to rear end, the transformation
The first end of device secondary windings is connected to the anode of the first diode, and the negative electrode of first diode passes through the first capacitance connection
In rear end, and the negative electrode of first diode is connected to the front end of filter inductance, the second end of the transformer secondary output winding
Be connected to the negative electrode of the second diode, the anode of second diode by the second capacitance connection in rear end, the filtering
The anode of the rear end of inductance and the second diode as full-bridge isolated variable unit output end；
One inversion reversed phase unit, is connected to the output end of full-bridge isolated variable unit, and the inversion reversed phase unit is used for full-bridge
The output voltage of isolated variable unit exports alternating current after carrying out inversion conversion.
2. the intelligent amendment wave voltage change-over circuit as claimed in claim 1 based on PFC, full-bridge and half-bridge, its feature exists
In the input block includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety electric capacity and rectifier bridge, the guarantor
Danger is serially connected with the zero line of socket or live wire, and the front end of the common mode inhibition inductance is parallel to socket, the lightning protection resistor coupled in parallel
In the front end of common mode inhibition inductance, the input of the safety electric capacity and rectifier bridge is parallel to the rear end of common mode inhibition inductance,
The output end of the rectifier bridge is parallel with filter capacitor.
3. the intelligent amendment wave voltage change-over circuit as claimed in claim 1 based on PFC, full-bridge and half-bridge, its feature exists
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 block, and the rear end of the boost inductance is connected to the leakage of the 3rd switching tube
Pole, with connecing front end, the grid of the 3rd switching tube is used to access pwm control signal all the way the source electrode of the 3rd switching tube,
The anode of drain electrode the first commutation diode of connection of 3rd switching tube, the negative electrode of first commutation diode is used as PFC
The output end of boosting unit, and the positive pole of negative electrode the second electrochemical capacitor of connection of first commutation diode, the second electrochemical capacitor
Negative pole with connecing front end.
4. the intelligent amendment wave voltage change-over circuit as claimed in claim 3 based on PFC, full-bridge and half-bridge, its feature exists
In also including a MCU control unit, grid, the grid of second switch pipe, the grid of the 3rd switching tube of the first switch pipe
The grid of pole, the grid of the 6th switching tube and the 7th switching tube is connected to MCU control unit, and the MCU control unit is used
In output pwm signal respectively to first switch pipe, second switch pipe, the 3rd switching tube, the 6th switching tube and the 7th switching tube, with
Control the on off operating mode of first switch pipe, second switch pipe, the 3rd switching tube, the 6th switching tube and the 7th switching tube.
5. the intelligent amendment wave voltage change-over circuit as claimed in claim 4 based on PFC, full-bridge and half-bridge, its feature exists
In also including an AC sampling unit, the AC sampling unit is connected to the input and MCU control unit of input block
Between, the AC sampling unit is used to gather the voltage of input block AC and feeds back to MCU control unit.
6. the intelligent amendment wave voltage change-over circuit as claimed in claim 5 based on PFC, full-bridge and half-bridge, its feature exists
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.
7. the intelligent amendment wave voltage change-over circuit as claimed in claim 4 based on PFC, full-bridge and half-bridge, its feature exists
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.
8. the intelligent amendment wave voltage change-over circuit as claimed in claim 4 based on PFC, full-bridge and half-bridge, its feature exists
In also including the second sampling resistor and the 3rd sampling resistor being sequentially connected in series, the front end of second sampling resistor is connected to
The output end of the full-bridge isolated variable unit, the rear end of the 3rd sampling resistor is connected to MCU control unit, by described
Second sampling resistor and the 3rd sampling resistor and make MCU control unit gather the telecommunications of full-bridge isolated variable unit output
Number.
9. the intelligent amendment wave voltage change-over circuit as claimed in claim 4 based on PFC, full-bridge and half-bridge, its feature exists
In the inversion reversed phase unit includes the 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor and the 4th electrochemical capacitor, institute
The drain electrode for stating the 4th switching tube is connected to the output head anode of full-bridge isolated variable unit, the source electrode connection of the 4th switching tube
In the drain electrode of the 5th switching tube, the source electrode of the 5th switching tube is connected to the negative pole of output end of full-bridge isolated variable unit, institute
The grid of the grid and the 5th switching tube of stating the 4th switching tube is respectively used to access the pwm pulse signal of two-way opposite in phase, institute
The positive pole for stating the 3rd electrochemical capacitor is connected to the drain electrode of the 4th switching tube, the negative pole connection rear end of the 3rd electrochemical capacitor,
The negative pole of 3rd electrochemical capacitor is also attached to the positive pole of the 4th electrochemical capacitor, and the negative pole of the 4th electrochemical capacitor is connected to
The source electrode of 5th switching tube, the source electrode of the 4th switching tube and the negative pole of the 3rd electrochemical capacitor are used as the defeated of inversion reversed phase unit
Go out end.
10. the intelligent amendment wave voltage change-over circuit as claimed in claim 9 based on PFC, full-bridge and half-bridge, its feature exists
In, be connected with first resistor between the grid and source electrode of the 4th switching tube, the grid and source electrode of the 5th switching tube it
Between be connected with second resistance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720005369.0U CN206620057U (en) | 2017-01-04 | 2017-01-04 | Intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787807A (en) * | 2017-01-04 | 2017-05-31 | 广东百事泰电子商务股份有限公司 | Intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge |
| CN112367748A (en) * | 2020-12-14 | 2021-02-12 | 深圳市华浩德电子有限公司 | Floating type buck-boost PFC circuit and LED driving power supply |
-
2017
- 2017-01-04 CN CN201720005369.0U patent/CN206620057U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787807A (en) * | 2017-01-04 | 2017-05-31 | 广东百事泰电子商务股份有限公司 | Intelligent amendment wave voltage change-over circuit based on PFC, full-bridge and half-bridge |
| CN112367748A (en) * | 2020-12-14 | 2021-02-12 | 深圳市华浩德电子有限公司 | Floating type buck-boost PFC circuit and LED driving power supply |
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Denomination of utility model: Intelligent Correction Wave Voltage Conversion Circuit Based on PFC, Full Bridge, and Half Bridge Effective date of registration: 20231227 Granted publication date: 20171107 Pledgee: Agricultural Bank of China Limited Zijin County Sub branch Pledgor: Heyuan baishitai Technology Co.,Ltd. Registration number: Y2023980074827 |