CN106533193A - PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit - Google Patents
PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit Download PDFInfo
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- CN106533193A CN106533193A CN201611153617.2A CN201611153617A CN106533193A CN 106533193 A CN106533193 A CN 106533193A CN 201611153617 A CN201611153617 A CN 201611153617A CN 106533193 A CN106533193 A CN 106533193A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit. The intelligent sine wave voltage conversion circuit comprises an input rectifying and filtering unit, a PFC voltage boosting unit, a full-bridge DC-to-DC isolation converter unit, an inversion phase reversal unit and a filtering inductor, wherein the full-bridge DC-to-DC isolation converter unit comprises a first switching tube, a second switching tube, a transformer, a first rectifying bridge, an eighth switching tube, a ninth switching tube and a first electrolytic capacitor; the inversion phase reversal unit is connected to the output end of the full-bridge DC-to-DC isolation converter unit for performing inversion conversion on the output voltage of the full-bridge DC-to-DC isolation converter unit and then outputting an alternating current; the front end of the filtering inductor is connected to the output end of the inversion phase reversal unit while the back end of the filtering inductor is connected with a load; and the filtering inductor is used for filtering high-frequency pulse and providing power frequency sine alternating current for the load. By adoption of the PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit, the output voltage quality can be improved, and the high-frequency pulse in the output signal can be filtered.
Description
Technical field
The present invention relates to voltage conversion circuit, more particularly to a kind of intelligent sine voltage turn of bridge of being enjoyed a double blessing based on PFC
Change circuit.
Background technology
In prior art, the intelligent boost-buck conversion equipment for turning AC by AC is otherwise known as travelling insert row, in the device, sinusoidal
Wave voltage change-over circuit topology is its Key Circuit, is a kind of circuit that can realize AC-AC conversion, can be in AC-AC conversion
Realize buck and the function of burning voltage and frequency.But current AC-AC just meaningful formula equipment Market great majority are non-isolated
The topological circuit of type, and PF values are low, output voltage quality is low, security reliability is poor.In practical application, due to voltage conversion process
The middle high speed switching that there is switching tube so that the outlet side of circuit can have certain high-frequency pulse signal, and then affect output
The quality of voltage, thus be difficult to meet conversion requirements.
The content of the invention
The technical problem to be solved in the present invention is, for the deficiencies in the prior art, there is provided a kind of to be enjoyed a double blessing bridge based on PFC
Intelligent sine voltage change-over circuit, to improve the PF values of voltage conversion device, improve output voltage quality, and can
The high-frequency impulse of outlet side is filtered, and then high-quality power frequency sinusoidal ac is provided for load.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that.
A kind of intelligent sine voltage change-over circuit of bridge of being enjoyed a double blessing based on PFC, which is included for entering to line voltage
Row rectification and filtering input rectifying filter unit, carry out boost conversion for the output voltage to input rectifying filter unit
PFC boost unit, and：One full-bridge DC turns DC isolated converter units, includes first switch pipe, second switch pipe, transformation
Device, the first rectifier bridge, the 8th switching tube, the 9th switching tube and the first electrochemical capacitor, the drain electrode of the first switch pipe are connected to
The outfan of PFC boost unit, the source electrode of the first switch pipe are connected to the first end of primary winding, and described second
The drain electrode of switching tube is connected to the source electrode of first switch pipe, and the source electrode of the second switch pipe connects front end ground, the 8th switch
The drain electrode of pipe is connected to the outfan of PFC boost unit, and the source electrode of the 8th switching tube is connected to primary winding
Second end, the drain electrode of the 9th switching tube are connected to the source electrode of the 8th switching tube, before the source electrode connection of the 9th switching tube
With holding, the grid of the grid of the first switch pipe, the grid of second switch pipe, the grid of the 8th switching tube and the 9th switching tube
It is respectively used to access pwm pulse signal, to control nine switching tube of first switch Guan Yu while break-make, and described second opens
Close eight switching tubes of Guan Yu simultaneously break-make, the two ends phase of the two ends of the transformer secondary winding and the first rectifier bridge input side is simultaneously
Connection, the negative pole of the first rectifier bridge outlet side are connected to rear end ground, and the positive pole of the first rectifier bridge outlet side is connected to the
The positive pole of one electrochemical capacitor, the negative pole of first electrochemical capacitor are connected to rear end ground, and the first rectifier bridge outlet side is just
Pole turns the outfan of DC isolated converter units as full-bridge DC；One inversion reversed phase unit, is connected to full-bridge DC and turns DC isolation changes
The outfan of exchange unit, the inversion reversed phase unit are carried out for the output voltage for turning DC isolated converter units to full-bridge DC
Output AC electricity after inversion conversion；One filter inductance, the front end of the filter inductance are connected to the outfan of inversion reversed phase unit,
The rear end connection load of the filter inductance, the filter inductance are used to filter high-frequency impulse, and it is sinusoidal to provide power frequency for load
Alternating current.
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 outfan of input rectifying filter unit, the rear end of the boost inductance
The drain electrode of the 3rd switching tube is connected to, the source electrode of the 3rd switching tube connects front end ground, and the grid of the 3rd switching tube is used for
Access pwm control signal all the way, the anode of drain electrode first commutation diode of connection of the 3rd switching tube, first rectification
Outfan 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 connects front end ground.
Preferably, also include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe,
The grid of the grid of eight switching tubes, the grid of the 9th switching tube and the 3rd switching tube is connected to MCU control unit, described
MCU control unit be used for respectively output pwm signal to first switch pipe, second switch pipe, the 8th switching tube, the 9th switching tube and
3rd switching tube, to control the logical of first switch pipe, second switch pipe, the 8th switching tube, the 9th switching tube and the 3rd switching tube
Disconnected state.
Preferably, the inversion reversed phase unit includes being opened by the 4th switching tube, the 5th switching tube, the 6th switching tube and the 7th
Close the inverter bridge of pipe composition, the grid of the 4th switching tube, the grid of the 5th switching tube, the grid and the 7th of the 6th switching tube
The grid of switching tube is connected to MCU control unit, the 4th switching tube is controlled by the MCU control unit, the 5th is opened
Guan Guan, the 6th switching tube and the 7th switching tube on or off, to make the inversion reversed phase unit output AC voltage.
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 input of the front end of common mode inhibition inductance, the safety electric capacity and rectifier bridge and are parallel to
The rear end of common mode inhibition inductance, the outfan of the rectifier bridge are parallel with filter capacitor.
Preferably, the full-bridge DC turns DC isolated converters unit and also includes the second sampling resistor and being sequentially connected in series
Three sampling resistors, the front end of second sampling resistor are connected to the positive pole of the first rectifier bridge outlet side, the 3rd sampling electricity
The rear end of resistance is connected to MCU control unit, makes MCU control unit adopt by second sampling resistor and the 3rd sampling resistor
Collection full-bridge DC turns the signal of telecommunication of DC isolated converters unit output.
Preferably, an AC sampling unit is also included, the AC sampling unit is connected to input rectifying filter unit
Input and MCU control unit between, the AC sampling unit is used to gather the electricity of input rectifying filter unit AC
Press and feed back to MCU control unit.
Preferably, the AC sampling unit includes amplifier, and two inputs of the amplifier are respectively by current limliting electricity
Hinder and be connected to the input of input rectifying filter unit, the outfan 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 signal of telecommunication of source electrode.
Preferably, the MCU control unit includes single-chip microcomputer and its peripheral circuit.
In the intelligent sine voltage change-over circuit of bridge of being enjoyed a double blessing based on PFC disclosed by the invention, filtered using input rectifying
Ripple unit carries out output ripple DC voltage after rectification and filtering to line voltage, straight to pulsing using PFC boost unit afterwards
Stream voltage carries out boosting process, turns, in DC isolated converter units, to lead when first switch pipe and nine switching tubes in full-bridge DC
It is logical；Electric current forms loop by first switch pipe, primary transformer coil, the 9th switching tube to front end, then by transformator
Magnetic core Rhizoma Nelumbinis are bonded to transformer secondary, and at this moment the two of the first rectifier bridge diode is started working, by AC rectification into unidirectional arteries and veins
Galvanic electricity gives the first electrochemical capacitor, and filters and form direct current.When second switch pipe and the 8th switching tube are turned on, electric current is by second
Switching tube primary coil, the 8th switching tube form loop to front end ground, are then bonded to transformer secondary by magnetic core of transformer Rhizoma Nelumbinis,
At this moment the another two diode of the first rectifier bridge is started working, and AC rectification is supplied electricity to the first electrochemical capacitor into unidirectional pulsation,
And filter and form direct current.The height of output voltage can be adjusted by the turn ratio for changing transformer primary secondary, and then realized
Boosting or blood pressure lowering.Based on said structure, the present invention realizes the isolation transmission of voltage by the way of full-bridge isolation, can be effective
The PF values of step-up/down conversion equipment are improved, while also improving output voltage quality so that voltage conversion process is safer
It is reliable.On this basis, the present invention is provided with filter inductance in the outfan of inversion reversed phase unit, can be filtered using filter inductance
High-frequency impulse in alternating current so that load is obtained in that the power frequency sinusoidal ac of high-quality, and then improves output voltage quality,
To meet power demands.
Description of the drawings
Fig. 1 is the schematic diagram of sine 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
With reference to the accompanying drawings and examples the present invention is described in more detail.
The invention discloses a kind of intelligent sine voltage change-over circuit of bridge of being enjoyed a double blessing based on PFC, with reference to Fig. 1 to Fig. 3
Shown, which is included for the input rectifying filter unit 10 of rectification and filtering is carried out to line voltage, for input rectifying
The output voltage of filter unit 10 carries out the PFC boost unit 20 of boost conversion, and：
One full-bridge DC turns DC isolated converters unit 30, includes first switch pipe Q6, second switch pipe Q7, transformator
T1, the first rectifier bridge (D5, D6, D7, D8), the 8th switching tube Q8, the 9th switching tube Q9 and the first electrochemical capacitor C3, described first
The drain electrode of switching tube Q6 is connected to the outfan of PFC boost unit 20, and the source electrode of the first switch pipe Q6 is connected to transformator
The first end of T1 armature windings, the drain electrode of the second switch pipe Q7 are connected to the source electrode of first switch pipe Q6, and described second opens
The source electrode for closing pipe Q7 connects front end ground, and the drain electrode of the 8th switching tube Q8 is connected to the outfan of PFC boost unit 20, and described the
The source electrode of eight switching tube Q8 is connected to the second end of transformator T1 armature windings, and the drain electrode of the 9th switching tube Q9 is connected to
The source electrode of eight switching tube Q8, the source electrode connection front end ground of the 9th switching tube Q9, the grid of the first switch pipe Q6, second
The grid of the grid of switching tube Q7, the grid of the 8th switching tube Q8 and the 9th switching tube Q9 is respectively used to access pwm pulse signal,
To control the first switch pipe Q6 and the 9th switching tube Q9 break-makes simultaneously, and the second switch pipe Q7 and the 8th switching tube Q8
While break-make, the two ends of the transformator T1 vice-side windings are with the two ends of the first rectifier bridge (D5, D6, D7, D8) input side mutually simultaneously
Connection, the negative pole of the first rectifier bridge (D5, D6, D7, D8) outlet side are connected to rear end ground, first rectifier bridge (D5, D6,
D7, D8) positive pole of outlet side is connected to the positive pole of the first electrochemical capacitor C3, after the negative pole of the first electrochemical capacitor C3 is connected to
End ground, the positive pole of the first rectifier bridge (D5, D6, D7, D8) outlet side turn DC isolated converters unit 30 as full-bridge DC
Outfan；
One inversion reversed phase unit 40, is connected to the outfan that full-bridge DC turns DC isolated converters unit 30, and the inversion is fallen
Facies unit 40 carries out output AC electricity after inversion conversion for the output voltage for turning DC isolated converters unit 30 to full-bridge DC；
The front end of one filter inductance L3, the filter inductance L3 is connected to the outfan of inversion reversed phase unit 40, the filter
The rear end of ripple inductance L3 connects load, and the filter inductance L3 is used to filter high-frequency impulse, and provides power frequency sinusoidal friendship for load
Stream electricity.
In the intelligent sine voltage change-over circuit of above-mentioned bridge of being enjoyed a double blessing based on PFC, using input rectifying filter unit 10
Output ripple DC voltage after rectification and filtering is carried out to line voltage, afterwards using PFC boost unit 20 to Rectified alternating current
Pressure carries out boosting process, turns in DC isolated converters unit 30 in full-bridge DC, as first switch pipe Q6 and the 9th switching tube Q9
Conducting；Electric current forms loop, Ran Houtong by first switch pipe Q6, transformator T1 primary coils, the 9th switching tube Q9 to front end
Cross transformator T1 magnetic core Rhizoma Nelumbinis and be bonded to transformer secondary, at this moment the two of the first rectifier bridge diode (D6, D7) is started working, will hand over
Stream electric rectification supplies electricity to the first electrochemical capacitor C3 into unidirectional pulsation, and filters and form direct current.When second switch pipe Q7 and the 8th is opened
When closing pipe Q8 conductings, electric current is formed back to front end by second switch pipe Q7, transformator T1 primary coils, the 8th switching tube Q8
Road, is then bonded to transformer secondary by transformator T1 magnetic core Rhizoma Nelumbinis, and at this moment the another two diode (D5, D8) of the first rectifier bridge is opened
AC rectification is supplied electricity to the first electrochemical capacitor C3 into unidirectional pulsation, and filters and form direct current by beginning work.By changing transformation
The turn ratio of device T1 original secondary can adjust the height of output voltage, and then realize boosting or blood pressure lowering.Based on said structure, this
It is bright by the way of full-bridge isolation to realize the isolation transmission of voltage, the PF values of step-up/down conversion equipment be effectively improved,
Also improve output voltage quality simultaneously so that voltage conversion process is more safe and reliable.On this basis, the present invention is in inversion
The outfan of reversed phase unit 70 is provided with filter inductance L3, the high-frequency impulse in alternating current can be filtered using filter inductance L3, is made
The power frequency sinusoidal ac for being obtained in that high-quality must be loaded, and then improves output voltage quality, to meet power demands.
With regard to part of boosting, in the present embodiment, the PFC boost unit 20 includes boost inductance L2, the 3rd switching tube
Q5, the first commutation diode D1 and the second electrochemical capacitor C2, the front end of the boost inductance L2 are connected to input rectifying filtering list
The outfan of unit 10, the rear end of the boost inductance L2 are connected to the drain electrode of the 3rd switching tube Q5, the 3rd switching tube Q5's
Source electrode connects front end ground, and the grid of the 3rd switching tube Q5 is used to access pwm control signal all the way, the 3rd switching tube Q5's
The anode of drain electrode the first commutation diode D1 of connection, the negative electrode of the first commutation diode D1 is used as PFC boost unit 20
Outfan, and the negative electrode of first commutation diode D1 connects the positive pole of the second electrochemical capacitor C2, the second electrochemical capacitor C2's is negative
Pole connects front end ground.
In above-mentioned PFC boost unit 20, when monitor input rectifying filter unit 10 output half-wave alternating voltage be, PFC
Boosting unit 20 enters boost mode, to improve the PF values that AC turns AC intelligence blood pressure lowering conversion topologies circuits, is filtered by C2 after boosting
Voltage after ripple is 400V, and specific boosting principle is as follows：When Q5 is turned on, the boosted inductance L2 of the electric current on C1, Q5 to GND shapes
Into loop, boost inductance L2 storage energy；When Q5 is turned off, the faradism more much higher than input voltage on boost inductance, can be formed
Kinetic potential, induction electromotive force formed Jing after continued flow tube D1 carries out rectification unidirectional pulse voltage give again C2 electric capacity enter filtering, be filtered into
The DC voltage of 400V.And Q5 is the input AC Electrical change adopted according to control chip increasing or reduce during the conducting of Q5
Between, so that electric current is consistent with voltage-phase change improving PF values.
With regard to the control section of the present invention, the present embodiment also includes a MCU control unit 80, the first switch pipe Q6
Grid, the grid of second switch pipe Q7, the grid of the 8th switching tube Q8, the grid of the 9th switching tube Q9 and the 3rd switching tube Q5
Grid be connected to MCU control unit 80, the MCU control unit 80 be used for respectively output pwm signal to first switch
Pipe Q6, second switch pipe Q7, the 8th switching tube Q8, the 9th switching tube Q9 and the 3rd switching tube Q5, with control first switch pipe Q6,
Second switch pipe Q7, the 8th switching tube Q8, the on off operating mode of the 9th switching tube Q9 and the 3rd switching tube Q5.Further, it is described
MCU control unit 80 includes single-chip microcomputer U1 and its peripheral circuit.
As a kind of optimal way, the inversion reversed phase unit 40 include by the 4th switching tube Q1, the 5th switching tube Q2,
The inverter bridge of six switching tube Q3 and the 7th switching tube Q4 compositions, the grid of the 4th switching tube Q1, the grid of the 5th switching tube Q2
The grid of pole, the grid of the 6th switching tube Q3 and the 7th switching tube Q4 is connected to MCU control unit 80, by the MCU
Control unit 80 and control the 4th switching tube Q1, the 5th switching tube Q2, the 6th switching tube Q3 and the 7th switching tube Q4 conducting or cut
Only, making 40 output AC voltage of inversion reversed phase unit.Further, the front end of filter inductance L3 is connected to inversion paraphase
The outfan of unit 40, and then filter the high-frequency impulse in the alternating voltage so that load obtains the power frequency simple alternating current of high-quality
Electricity.
In above-mentioned inversion reversed phase unit 40, the DC voltage Jing Q1, L4, load, Q4 through C3 filter capacitors forms loop
Powering load forms first high frequency arteries and veins level；Second high-frequency impulse level forms loop by Q2, L3, load, Q3, leads to
Cross L3 to be filtered the inhibition of high-frequency impulse level, a complete power frequency sine wave exchange is formed in load
Voltage.The pwm signal that single-chip microcomputer U1 is exported sends GATE of the four road pwm signals to Q1, Q2, Q3, Q4 respectively Jing after drive circuit
Pole.Phase place in inversion phase inverter is operated according to the pattern of control chip inner setting with frequency, and Q1, Q2, Q3, Q4
It is to modulate high-frequency PWM pattern by power frequency to be operated, high-frequency impulse level is filtered by inductance L3, leaves power frequency sinusoidal ac
To load supplying.
With regard to ac input division point, the input rectifying filter unit 10 include 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 or live wire of socket, described
The front end of common mode inhibition inductance L1 is parallel to socket, and the lightning protection resistance RV1 is parallel to the front end of common mode inhibition inductance L1, described
The input of safety electric capacity CX1 and rectifier bridge DB1 is parallel to the rear end of common mode inhibition inductance L1, and the rectifier bridge DB1's is defeated
Go out end and be parallel with filter capacitor C1.
In the present embodiment, in order to realize that the unidirectional current for turning the output of DC isolated converters unit 30 to full-bridge DC is sampled,
The full-bridge DC turns DC isolated converters unit 30 and also includes the second sampling resistor R13 and the 3rd sampling resistor being sequentially connected in series
R15, the front end of the second sampling resistor R13 are connected to the positive pole of the first rectifier bridge (D5, D6, D7, D8) outlet side, and described
The rear end of three sampling resistor R15 is connected to MCU control unit 80, by the second sampling resistor R13 and the 3rd sampling resistor
R15 and make MCU control unit 80 collection full-bridge DC turn DC isolated converters unit 30 output the signal of telecommunication.
In order to monitor the output signal of input rectifying filter unit 10, 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 10 AC of input rectifying filter unit and feed back to MCU control unit 80.
Further, the AC sampling unit 70 includes amplifier U9B, two input difference of amplifier U9B
The input of input rectifying filter unit 10 is connected to by current-limiting resistance, the outfan of amplifier U9B is connected to MCU controls
Unit processed 80.
For the ease of carrying out Real-time Collection to the electric current in PFC boost unit 20, the source electrode of the 3rd switching tube Q5 with
The first sampling resistor R2A is connected between the ground of front end, the source electrode of the 3rd switching tube Q5 is connected to MCU control unit 80, mat
MCU control unit 80 is made to gather the signal of telecommunication of the 3rd switching tube Q5 source electrodes by the first sampling resistor R2A.
The intelligent sine voltage change-over circuit of bridge of being enjoyed a double blessing based on PFC disclosed by the invention, its compared to existing technology and
Speech, first, the present invention has high PF values, realizes electrical network and isolates with outfan, and safety is very high, meanwhile, in the full electricity of input
Can automatically adjust output voltage in the range of pressure, and fixed output frequency, again, output voltage be with sinewave output,
Automatic shaping function is pressed with to alternating current, additionally, the present invention program contains voltage and current sampling circuit, can anti-surge voltage with
Electric current.
The above is preferred embodiments of the present invention, is not limited to the present invention, all technology models in the present invention
Enclose interior done modification, equivalent or improvement etc., should be included in the present invention it is protected in the range of.
Claims (10)
1. a kind of intelligent sine voltage change-over circuit of bridge of being enjoyed a double blessing based on PFC, it is characterised in that include for electrical network
Voltage carry out rectification and filtering input rectifying filter unit, for boosting to the output voltage of input rectifying filter unit
The PFC boost unit of conversion, and：
One full-bridge DC turns DC isolated converter units, include first switch pipe, second switch pipe, transformator, the first rectifier bridge,
8th switching tube, the 9th switching tube and the first electrochemical capacitor, the drain electrode of the first switch pipe are connected to the defeated of PFC boost unit
Go out end, the source electrode of the first switch pipe is connected to the first end of primary winding, and the drain electrode of the second switch pipe connects
The source electrode of first switch pipe is connected to, the source electrode of the second switch pipe connects front end ground, and the drain electrode of the 8th switching tube is connected to
The outfan of PFC boost unit, the source electrode of the 8th switching tube are connected to the second end of primary winding, and the described 9th
The drain electrode of switching tube is connected to the source electrode of the 8th switching tube, and the source electrode of the 9th switching tube connects front end ground, and described first opens
The grid for closing grid, the grid of second switch pipe, the grid of the 8th switching tube and the 9th switching tube of pipe is respectively used to access PWM
Pulse signal, to control nine switching tube of first switch Guan Yu while break-make, and the second switch Guan Yu eight is switched
Break-make simultaneously is managed, the two ends of the transformer secondary winding are in parallel with the two ends of the first rectifier bridge input side, and described first is whole
The negative pole of stream bridge outlet side is connected to rear end ground, and the positive pole of the first rectifier bridge outlet side is just being connected to the first electrochemical capacitor
Pole, the negative pole of first electrochemical capacitor are connected to rear end ground, and the positive pole of the first rectifier bridge outlet side turns as full-bridge DC
The outfan of DC isolated converter units；
One inversion reversed phase unit, is connected to the outfan that full-bridge DC turns DC isolated converter units, and the inversion reversed phase unit is used
Output AC electricity after inversion conversion is carried out in the output voltage for turning DC isolated converter units to full-bridge DC；
One filter inductance, the front end of the filter inductance are connected to the outfan of inversion reversed phase unit, after the filter inductance
End connection load, the filter inductance are used to filter high-frequency impulse, and provide power frequency sinusoidal ac for load.
2. enjoyed a double blessing based on PFC as claimed in claim 1 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
State PFC boost unit and include boost inductance, the 3rd switching tube, the first commutation diode and the second electrochemical capacitor, the boosting
The front end of inductance is connected to the outfan of input rectifying filter unit, and the rear end of the boost inductance is connected to the 3rd switching tube
Drain electrode, the source electrode of the 3rd switching tube connect front end ground, and the grid of the 3rd switching tube is used to access PWM controls letter all the way
Number, the anode of drain electrode first commutation diode of connection of the 3rd switching tube, the negative electrode conduct of first commutation diode
The outfan of PFC boost unit, and the negative electrode of first commutation diode connects the positive pole of the second electrochemical capacitor, the second electrolysis electricity
The negative pole of appearance connects front end ground.
3. enjoyed a double blessing based on PFC as claimed in claim 2 the intelligent sine voltage change-over circuit of bridge, it is characterised in that also
Include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe, the grid of the 8th switching tube,
The grid of the grid of nine switching tubes and the 3rd switching tube is connected to MCU control unit, and the MCU control unit is used to distinguish
Output pwm signal to first switch pipe, second switch pipe, the 8th switching tube, the 9th switching tube and the 3rd switching tube, to control
The on off operating mode of one switching tube, second switch pipe, the 8th switching tube, the 9th switching tube and the 3rd switching tube.
4. enjoyed a double blessing based on PFC as claimed in claim 3 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
The inverter bridge that inversion reversed phase unit includes being made up of the 4th switching tube, the 5th switching tube, the 6th switching tube and the 7th switching tube is stated,
The grid of the 4th switching tube, the grid difference of the grid, the grid of the 6th switching tube and the 7th switching tube of the 5th switching tube
Be connected to MCU control unit, control by the MCU control unit the 4th switching tube, the 5th switching tube, the 6th switching tube and
7th switching tube on or off, to make the inversion reversed phase unit output AC voltage.
5. enjoyed a double blessing based on PFC as claimed in claim 1 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
State input rectifying filter unit and include socket, insurance, lightning protection resistance, common mode inhibition inductance, safety electric capacity and rectifier bridge, it is described
Insurance is 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, and the lightning protection resistance is simultaneously
Be coupled to the front end of common mode inhibition inductance, the safety electric capacity and rectifier bridge input be parallel to common mode inhibition inductance after
End, the outfan of the rectifier bridge are parallel with filter capacitor.
6. enjoyed a double blessing based on PFC as claimed in claim 3 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
State full-bridge DC and turn DC isolated converters unit and also include the second sampling resistor and the 3rd sampling resistor being sequentially connected in series, described
The front end of two sampling resistors is connected to the positive pole of the first rectifier bridge outlet side, and the rear end of the 3rd sampling resistor is connected to MCU
Control unit, makes MCU control unit collection full-bridge DC turn DC isolation by second sampling resistor and the 3rd sampling resistor
The signal of telecommunication of power converter cells output.
7. enjoyed a double blessing based on PFC as claimed in claim 3 the intelligent sine voltage change-over circuit of bridge, it is characterised in that also
An AC sampling unit is included, the AC sampling unit is connected to the input of input rectifying filter unit and MCU is controlled
Between unit, the AC sampling unit is used to gather the voltage of input rectifying filter unit AC and feed back to MCU controls
Unit.
8. enjoyed a double blessing based on PFC as claimed in claim 7 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
State AC sampling unit and include amplifier, two inputs of the amplifier are connected to input rectifying respectively by current-limiting resistance
The input of filter unit, the outfan of the amplifier are connected to MCU control unit.
9. enjoyed a double blessing based on PFC as claimed in claim 3 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
The first sampling resistor is connected between the source electrode and front end ground of stating the 3rd switching tube, the source electrode of the 3rd switching tube is connected to
MCU control unit, makes MCU control unit gather the signal of telecommunication of the 3rd switching tube source electrode by first sampling resistor.
10. enjoyed a double blessing based on PFC as claimed in claim 3 the intelligent sine voltage change-over circuit of bridge, it is characterised in that institute
State MCU control unit and include single-chip microcomputer and its peripheral circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153617.2A CN106533193A (en) | 2016-12-14 | 2016-12-14 | PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit |
| PCT/CN2017/079191 WO2018107623A1 (en) | 2016-12-14 | 2017-04-01 | Pfc dual-full-bridge-based smart sine wave voltage conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153617.2A CN106533193A (en) | 2016-12-14 | 2016-12-14 | PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit |
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| Publication Number | Publication Date |
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| CN106533193A true CN106533193A (en) | 2017-03-22 |
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Family Applications (1)
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|---|---|---|---|
| CN201611153617.2A Pending CN106533193A (en) | 2016-12-14 | 2016-12-14 | PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit |
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| CN (1) | CN106533193A (en) |
| WO (1) | WO2018107623A1 (en) |
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| CN112398414A (en) * | 2019-08-16 | 2021-02-23 | 泛仕达机电股份有限公司 | Two-phase stepless variable frequency speed regulation control circuit and method for household purifier |
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| CN110492773A (en) * | 2019-08-19 | 2019-11-22 | 佛山市众盈电子有限公司 | A kind of inverter circuit |
| CN110829947A (en) * | 2019-10-11 | 2020-02-21 | 新乡航空工业(集团)有限公司 | Motor control system based on aviation three-phase PFC |
| CN115514071A (en) * | 2022-09-26 | 2022-12-23 | 深圳易能电科技有限公司 | Charging circuit with low power consumption and charging device using same |
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| WO2018107623A1 (en) | 2018-06-21 |
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