CN106787780A - Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance - Google Patents
Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance Download PDFInfo
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- CN106787780A CN106787780A CN201710003732.XA CN201710003732A CN106787780A CN 106787780 A CN106787780 A CN 106787780A CN 201710003732 A CN201710003732 A CN 201710003732A CN 106787780 A CN106787780 A CN 106787780A
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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
- 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
- H02M3/338—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 in a self-oscillating arrangement
- H02M3/3381—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 in a self-oscillating arrangement using a single commutation path
-
- 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
- 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
-
- 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
- H02M3/33561—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 more than one ouput with independent control
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance, it is included：Input block；Filter unit；PFC boost unit；LLC isolated converter units, include first switch pipe, second switch pipe, transformer, first diode, second diode and filter inductance, the source electrode of first switch pipe is connected to the first end of primary winding, second end of primary winding is connected to front end ground by the first resonant capacitance, the drain electrode of second switch pipe is connected to the first end of primary winding, the first end of transformer secondary output winding is connected to the negative electrode of the first diode, second end of transformer secondary output winding is connected to the anode of the second diode, the negative electrode of the second diode is connected to the front end of filter inductance；Inversion reversed phase unit.The present invention can improve PF values and output voltage quality.
Description
Technical field
The present invention relates to voltage conversion circuit, more particularly to a kind of intelligent half-bridge amendment ripple electricity based on PFC and LLC resonance
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.
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 one kind can improve voltage conversion
The PF values of device, output voltage quality can be improved, and the safe and reliable intelligent half-bridge amendment ripple based on PFC Yu LLC resonance
Voltage conversion circuit.
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 Yu LLC resonance, it is included：One input block,
For providing DC voltage；One filter unit, is connected to the output end of input block, enters for the output voltage to input block
Row filtering；One PFC boost unit, is connected to the output end of filter unit, is boosted for the output voltage to filter unit
Conversion；One LLC isolated converter units, include first switch pipe, second switch pipe, transformer, the first diode, the two or two
Pole pipe and filter inductance, the drain electrode of the first switch pipe are connected to the output end of PFC boost unit, the first switch pipe
Source electrode is connected to the first end of primary winding, and the second end of the primary winding is connected by the first resonant capacitance
Front end ground is connected to, the drain electrode of the second switch pipe is connected to the first end of primary winding, the second switch pipe
Source electrode is connected to front end ground by 3rd resistor, and the grid of the first switch pipe and the grid of second switch pipe are used to load two
The pwm pulse signal of road opposite in phase, to make the first switch pipe and second switch pipe alternate conduction, the transformer secondary output
The centre tap of winding is connected to rear end ground, and the first end of the transformer secondary output winding is connected to the negative electrode of the first diode,
By the second capacitance connection in rear end ground, the second end of the transformer secondary output winding is connected to the anode of first diode
The anode of the second diode, the negative electrode of second diode is connected to the front end of filter inductance, the rear end of the filter inductance
By the 3rd capacitance connection in rear end ground, the anode of the rear end of the filter inductance and the first diode is used as LLC isolated variables
The output end of device unit；One inversion reversed phase unit, is connected to the output end of LLC isolated converter units, the inversion paraphase list
Unit exports alternating current after carrying out inversion conversion for the output voltage to LLC isolated converter units.
Preferably, the input block includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety electric capacity and whole
Stream bridge, the insurance 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, described anti-
Thunder and lightning 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 common mode inhibition electricity
The rear end of sense.
Preferably, the filter unit includes filter capacitor, and the filter capacitor is parallel to the output end of rectifier bridge.
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, the source electrode of the 3rd switching tube connects front end ground, and the grid of the 3rd switching tube is used to access all the way
Pwm control signal, the anode of drain electrode first commutation diode of connection of the 3rd switching tube, first commutation diode
Negative electrode as PFC boost unit output end, 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 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, 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 feed back to MCU controls
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 end of the primary winding is connected to MCU control unit, to make MCU control unit adopt
Collect the electric signal of primary winding.
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 output of LLC isolated converter units
End, the rear end of the 3rd sampling resistor is connected to MCU control unit, by second sampling resistor and the 3rd sampling resistor
And make MCU control unit gather the electric signal of LLC isolated converters unit 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 LLC isolated converter units, 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 LLC isolated converter units
Negative pole of output end, the grid of the 4th switching tube and the grid of the 5th switching tube are respectively used to access two-way opposite in phase
Pwm pulse signal, the positive pole of the 3rd electrochemical capacitor is connected to the drain electrode of the 4th switching tube, the 3rd electrochemical capacitor it is negative
Pole connection rear end ground, the negative pole of the 3rd electrochemical capacitor is also attached to the positive pole of the 4th electrochemical capacitor, the 4th electrolysis electricity
The negative pole of appearance is connected to the source electrode of the 5th switching tube, and the source electrode of the 4th switching tube and the negative pole of the 3rd electrochemical capacitor are used as inverse
Become the output end of reversed phase unit.
In intelligent half-bridge amendment wave voltage change-over circuit based on PFC and LLC resonance disclosed by the invention, input block is carried
The DC voltage of confession after unit filtering, boost conversion is carried out by PFC boost unit after filtering, is transmitted afterwards to LLC and is isolated change
Exchange unit, in LLC isolated converter units, first switch pipe, second switch pipe, the first resonant capacitance, primary
Leakage inductance and primary magnetizing inductance composition LLC resonance circuits, so as to by power transmission to transformer secondary coil, by first
Diode, the second diode rectification into two ripple levels of opposite direction, then by filter inductance, the second electric capacity, the 3rd electric capacity
And the DC voltage comprising positive negative direction is filtered into, and by changing the turn ratio of transformer primary and secondary, output electricity can be adjusted
The height of pressure, and then realize boosting or step-down conversion.Based on said structure, the isolation that the present invention not only realizes voltage is passed
It is defeated, so improve step-up/down conversion equipment PF values, also improve output voltage quality so that voltage conversion process is more
It is safe and reliable.
Brief description of the drawings
Fig. 1 is the schematic diagram of full-bridge amendment wave voltage change-over circuit of the present invention.
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 Yu LLC resonance, with reference to Fig. 1
Shown in Fig. 3, it is included：
One input block 10, for providing DC voltage；
One filter unit 20, is connected to the output end of input block 10, is carried out for the output voltage to input block 10
Filtering；
One PFC boost unit 30, is connected to the output end of filter unit 20, enters for the output voltage to filter unit 20
Row boost conversion；
One LLC isolated converters unit 40, includes first switch pipe Q6, second switch pipe Q7, transformer T1, the one or two
Pole pipe D5, the second diode D6 and filter inductance L3, the drain electrode of the first switch pipe Q6 are connected to the defeated of PFC boost unit 30
Go out end, the source electrode of the first switch pipe Q6 is connected to the first end of transformer T1 armature windings, the transformer T1 it is primary around
Second end of group is connected to front end ground by the first resonant capacitance C4, and the drain electrode of the second switch pipe Q7 is connected to transformer T1
The first end of armature winding, the source electrode of the second switch pipe Q7 is connected to front end ground by 3rd resistor R2B, and described first opens
The grid of the grid and second switch pipe Q7 that close pipe Q6 is used to load the pwm pulse signal of two-way opposite in phase, to make described the
One switching tube Q6 and second switch pipe Q7 alternate conductions, the centre tap of the transformer T1 secondary windings are connected to rear end ground,
The first end of the transformer T1 secondary windings is connected to the negative electrode of the first diode D5, and the anode of the first diode D5 leads to
Cross the second electric capacity C7 and be connected to rear end ground, the second end of the transformer T1 secondary windings is connected to the sun of the second diode D6
Pole, the negative electrode of the second diode D6 is connected to the front end of filter inductance L3, and the rear end of the filter inductance L3 passes through the 3rd
With being connected to rear end, the anode of the rear end of the filter inductance L3 and the first diode D5 is used as LLC isolated converters for electric capacity C8
The output end of unit 40；
One inversion reversed phase unit 60, is connected to the output end of LLC isolated converters unit 40, the inversion reversed phase unit 60
Alternating current is exported after carrying out inversion conversion for the output voltage to LLC isolated converters unit 40.
In above-mentioned amendment wave voltage change-over circuit, unit 20 is filtered the DC voltage that input block 10 is provided after filtering
Afterwards, boost conversion is carried out by PFC boost unit 30, is transmitted afterwards to LLC isolated converters unit 40, in LLC isolated converters
In unit 40, first switch pipe Q6, second switch pipe Q7, the first resonant capacitance C4, transformer T1 primary leakage inductance and primary is encouraged
Magnetoelectricity sense constitutes LLC resonance circuits, so as to by power transmission to transformer T1 secondary coil, by the first diode D5, the
Two diode D6 are rectified into two ripple levels of opposite direction, then by filter inductance L3, the second electric capacity C7, the 3rd electric capacity C8 and
The DC voltage comprising positive negative direction is filtered into, and by changing the turn ratio of transformer T1 primary and secondaries, output electricity can be adjusted
The height of pressure, and then realize boosting or step-down conversion.Based on said structure, the isolation that the present invention not only realizes voltage is passed
It is defeated, so improve step-up/down conversion equipment PF values, also improve output voltage quality so that voltage conversion process is more
It is safe and reliable.
On importation, the input block 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 inhibition inductance
The front end of L1 is parallel to socket, and the lightning protection resistance RV1 is parallel to the front end of common mode inhibition inductance L1, the safety electric capacity CX1
Input with rectifier bridge DB1 is parallel to the rear end of common mode inhibition inductance L1.
In order to be filtered to input voltage, the filter unit 20 includes filter capacitor C1, the filter capacitor C1
It is parallel to the output end of rectifier bridge DB1.
On boosting part, the PFC boost unit 30 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 end of input block 10, the liter
The rear end of voltage 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, and described the
The grid of three 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 first rectification two
The anode of pole pipe D1, the negative electrode of the first commutation diode D1 as PFC boost unit 30 output end, and first rectification
The negative electrode of 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.
In above-mentioned PFC boost unit 30, if filter capacitor C1 output half-wave alternating voltages, PFC enters boost mode, to carry
AC high 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 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.
Used as a kind of preferred embodiment, as shown in figure 3, the present embodiment also includes a MCU control unit 80, 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.
For the ease of monitoring the electric signal of AC, Fig. 2 is refer to, also include an AC sampling unit 70, the friendship
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 two inputs difference of amplifier U9B, the amplifier U9B
The input of input block 10 is connected to by current-limiting resistance, the output end of the amplifier U9B is connected to MCU control unit
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.
On this basis, the second end of the transformer T1 armature windings is connected to MCU control unit 80, to make MCU control
Unit processed 80 gathers the electric signal of transformer T1 armature windings.
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 LLC isolated converters unit 40, the 3rd sampling electricity
The rear end for hindering R15 is connected to MCU control unit 80, is made by the second sampling resistor R13 and the 3rd sampling resistor R15
The electric signal of the output of the collection LLC isolated converters of MCU control unit 80 unit 40.
On Converting Unit, Fig. 1 is refer to, the inversion reversed phase unit 60 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 LLC isolated converters
The output head anode of unit 40, the source electrode of the 4th switching tube Q2 is connected to the drain electrode of the 5th switching tube Q4, and the described 5th opens
The source electrode for closing pipe Q4 is connected to the negative pole of output end of LLC isolated converters unit 40, the grid of the 4th switching tube Q2 and the
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 C5, and the negative pole of the 4th electrochemical capacitor C5 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, inductance L3 filter inductances filter into DC voltage through the 4th switching tube after filtering
Q2, load, the 4th electrochemical capacitor C4 form loop powering load and form first half period amendment ripple level；Second half cycle
Phase amendment ripple 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, can be with
Filter circuit is constituted with filter inductance L3.The control of this inverter circuit is simple, and circuit is with low cost only with two metal-oxide-semiconductors.
Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance 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 Yu LLC resonance, it is characterised in that include：
One input block (10), for providing DC voltage；
One filter unit (20), is connected to the output end of input block (10), enters for the output voltage to input block (10)
Row filtering；
One PFC boost unit (30), is connected to the output end of filter unit (20), for the output voltage to filter unit (20)
Carry out boost conversion；
One LLC isolated converters unit (40), include first switch pipe (Q6), second switch pipe (Q7), transformer (T1),
One diode (D5), the second diode (D6) and filter inductance (L3), the drain electrode of the first switch pipe (Q6) are connected to PFC liters
The output end of pressure unit (30), the source electrode of the first switch pipe (Q6) is connected to the first end of transformer (T1) armature winding,
Second end of transformer (T1) armature winding is connected to front end ground, the second switch pipe by the first resonant capacitance (C4)
(Q7) drain electrode is connected to the first end of transformer (T1) armature winding, and the source electrode of the second switch pipe (Q7) is by the 3rd electricity
Resistance (R2B) is connected to front end ground, and the grid of the first switch pipe (Q6) and the grid of second switch pipe (Q7) are used to load two
The pwm pulse signal of road opposite in phase, to make the first switch pipe (Q6) and second switch pipe (Q7) alternate conduction, the change
The centre tap of depressor (T1) secondary windings is connected to rear end ground, and the first end of transformer (T1) secondary windings is connected to the
The negative electrode of one diode (D5), the anode of first diode (D5) is connected to rear end ground by the second electric capacity (C7), described
Second end of transformer (T1) secondary windings is connected to the anode of the second diode (D6), the negative electrode of second diode (D6)
The front end of filter inductance (L3) is connected to, the rear end of the filter inductance (L3) is connected to rear end ground by the 3rd electric capacity (C8),
The rear end of the filter inductance (L3) and the anode of the first diode (D5) as LLC isolated converters unit (40) output
End；
One inversion reversed phase unit (60), is connected to the output end of LLC isolated converters unit (40), the inversion reversed phase unit
(60) alternating current is exported after carrying out inversion conversion for the output voltage to LLC isolated converters unit (40).
2. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance is based on as claimed in claim 1, and its feature exists
In the input block (10) includes socket, insurance (F2), lightning protection resistance (RV1), common mode inhibition inductance (L1), safety electricity
Hold (CX1) and rectifier bridge (DB1), the insurance (F2) is serially connected with the zero line of socket or live wire, the common mode inhibition inductance
(L1) front end is parallel to socket, and the lightning protection resistance (RV1) is parallel to the front end of common mode inhibition inductance (L1), the safety electricity
The input of appearance (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 and LLC resonance is based on as claimed in claim 2, and its feature exists
In the filter unit (20) includes filter capacitor (C1), and the filter capacitor (C1) is parallel to the output of rectifier bridge (DB1)
End.
4. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance is based on as claimed in claim 1, and its feature exists
In, the PFC boost unit (30) 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 block (10), described liter of piezoelectricity
The rear end for feeling (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, described
The grid of the 3rd switching tube (Q5) is used to access pwm control signal all the way, the drain electrode connection first of the 3rd switching tube (Q5)
The anode of commutation diode (D1), the negative electrode of first commutation diode (D1) as PFC boost unit (30) output end,
And the negative electrode of first commutation diode (D1) connects the positive pole of the second electrochemical capacitor (C2), the negative pole of the second electrochemical capacitor (C2)
Connect front end ground.
5. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance 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 and LLC resonance 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 the input of input block (10)
Between MCU control unit (80), the AC sampling unit (70) for gather input block (10) AC voltage simultaneously
Feed back to MCU control unit (80).
7. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance 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.
8. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance is based on as claimed in claim 5, and its feature exists
In the second end of transformer (T1) armature winding is connected to MCU control unit (80), to make MCU control unit (80) adopt
Collect the electric signal of transformer (T1) armature winding.
9. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance is based on as claimed in claim 5, and its feature exists
In, a D/C voltage sampling unit (50) is also included, the D/C voltage sampling unit (50) includes second for being sequentially connected in series and adopts
Sample resistance (R13) and the 3rd sampling resistor (R15), the front end of second sampling resistor (R13) are connected to LLC isolated converters
The output end of unit (40), the rear end of the 3rd sampling resistor (R15) is connected to MCU control unit (80), by described
Two sampling resistors (R13) and the 3rd sampling resistor (R15) and make MCU control unit (80) gather LLC isolated converter units
(40) electric signal of output.
10. the intelligent half-bridge amendment wave voltage change-over circuit of PFC and LLC resonance is based on as claimed in claim 5, and its feature exists
In, the inversion reversed phase unit (60) include the 4th switching tube (Q2), the 5th switching tube (Q4), the 3rd electrochemical capacitor (C3) and
4th electrochemical capacitor (C5), the drain electrode of the 4th switching tube (Q2) is connected to the output end of LLC isolated converters unit (40)
Positive pole, the source electrode of the 4th switching tube (Q2) is connected to the drain electrode of the 5th switching tube (Q4), the 5th switching tube (Q4)
Source electrode is connected to the negative pole of output end of LLC isolated converters unit (40), and the grid and the 5th of the 4th switching tube (Q2) is opened
The grid for closing pipe (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 electricity
The negative pole of solution electric capacity (C3) is also attached to the positive pole of the 4th electrochemical capacitor (C5), the negative pole connection of the 4th electrochemical capacitor (C5)
In the source electrode of the 5th switching tube (Q4), the source electrode of the 4th switching tube (Q2) and the negative pole of the 3rd electrochemical capacitor (C3) are used as inverse
Become the output end of reversed phase unit (60).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003732.XA CN106787780A (en) | 2017-01-04 | 2017-01-04 | Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance |
| PCT/CN2017/080984 WO2018126556A1 (en) | 2017-01-04 | 2017-04-19 | Intelligent half-bridge correction wave voltage conversion circuit based on pfc and llc resonances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003732.XA CN106787780A (en) | 2017-01-04 | 2017-01-04 | Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106787780A true CN106787780A (en) | 2017-05-31 |
Family
ID=58949566
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710003732.XA Pending CN106787780A (en) | 2017-01-04 | 2017-01-04 | Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106787780A (en) |
| WO (1) | WO2018126556A1 (en) |
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| WO2018126557A1 (en) * | 2017-01-04 | 2018-07-12 | 广东百事泰电子商务股份有限公司 | Pfc and llc resonance-based smart half bridge sine wave voltage conversion circuit |
| 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 |
| CN116526428A (en) * | 2023-07-04 | 2023-08-01 | 广东东菱电源科技有限公司 | BUCK fast switch-on and switch-off protection circuit |
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| US20040012343A1 (en) * | 2002-07-19 | 2004-01-22 | Nostwick Allan Albert | Lighting control system with variable arc control including start-up circuit for providing a bias voltage supply |
| CN101527520A (en) * | 2009-01-20 | 2009-09-09 | 华南理工大学 | Single-stage single-phase AC-DC convertor based on LLC series resonance |
| CN101902137A (en) * | 2009-05-29 | 2010-12-01 | 索尼公司 | Supply unit |
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| US20040012343A1 (en) * | 2002-07-19 | 2004-01-22 | Nostwick Allan Albert | Lighting control system with variable arc control including start-up circuit for providing a bias voltage supply |
| CN101527520A (en) * | 2009-01-20 | 2009-09-09 | 华南理工大学 | Single-stage single-phase AC-DC convertor based on LLC series resonance |
| CN101902137A (en) * | 2009-05-29 | 2010-12-01 | 索尼公司 | Supply unit |
| CN103117642A (en) * | 2012-05-25 | 2013-05-22 | 深圳市中兴昆腾有限公司 | Control system and method of liquid level control (LLC) resonant converter |
| CN206364710U (en) * | 2017-01-04 | 2017-07-28 | 广东百事泰电子商务股份有限公司 | Intelligent half-bridge amendment wave voltage change-over circuit based on PFC Yu LLC resonance |
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| 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 |
| CN116526428A (en) * | 2023-07-04 | 2023-08-01 | 广东东菱电源科技有限公司 | BUCK fast switch-on and switch-off protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018126556A1 (en) | 2018-07-12 |
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