CN106787799A - A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges - Google Patents
A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges Download PDFInfo
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- CN106787799A CN106787799A CN201611226229.2A CN201611226229A CN106787799A CN 106787799 A CN106787799 A CN 106787799A CN 201611226229 A CN201611226229 A CN 201611226229A CN 106787799 A CN106787799 A CN 106787799A
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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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges, it is included：Input rectifying filter unit；PFC boost unit；One isolated form two-transistor forward converter, includes first switch pipe, second switch pipe, the first diode, the second diode, the 3rd diode, the 4th diode, transformer and filter inductance；One inversion reversed phase unit, include the 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor, the 4th electrochemical capacitor and the first filter inductance, the grid of the 4th switching tube and the grid of the 5th switching tube are respectively used to access the pwm pulse signal of two-way opposite in phase, the source electrode of the 4th switching tube is also attached to the front end of the first filter inductance, the negative pole of the 3rd electrochemical capacitor is also attached to the positive pole of the 4th electrochemical capacitor, the rear end of first filter inductance and the negative pole of the 3rd electrochemical capacitor as inversion reversed phase unit output end.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 sine voltage based on PFC normal shock half-bridges
Change-over 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, sinusoidal in the device
Wave voltage change-over circuit is its Key Circuit, is a kind of circuit that can realize AC-AC conversion, can be realized in AC-AC conversion
The function of buck and burning voltage and frequency.But current AC-AC just most of meaningful formula equipment Market is non-isolation type
Topological circuit, and PF values are low, output voltage quality is low, security reliability is poor.In practical application, due to being deposited during voltage conversion
Switch in the high speed of switching tube so that the outlet side of circuit can have certain high-frequency pulse signal, and then influence output voltage
Quality, thus be difficult to meet conversion requirements.
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 high-frequency impulse of outlet side can be filtered, and then for load provides high-quality
The intelligent sine voltage change-over circuit based on PFC normal shock half-bridges of power frequency sinusoidal ac.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that.
A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges, it is included：One input rectifying is filtered
Unit, its input connection power network, for carrying out rectification and filtering to line voltage；One PFC boost unit, is connected to input whole
The output end of filter unit is flowed, boost conversion is carried out for the output voltage to input rectifying filter unit；One isolated form is two-tube
Forward converter, includes first switch pipe, second switch pipe, the first diode, the second diode, the 3rd diode, the 4th
Diode, transformer and filter inductance, the drain electrode of the first switch pipe are connected to the output end of PFC boost unit, described
The source electrode of one switching tube is connected to the first end of primary winding, the second end connection second of the primary winding
The drain electrode of switching tube, the source electrode connection front end ground of the second switch pipe, the negative electrode of first diode is connected to first and opens
The drain electrode of pipe is closed, the anode of first diode is connected to the second end of primary winding, second diode
Negative electrode is connected to the first end of primary winding, and the anode of second diode is connected to the source electrode of second switch pipe,
The grid of the first switch pipe and the grid of second switch pipe are used to accessing identical pwm signal, the transformer secondary output around
The centre tap of group is connected to rear end ground, and the first end of the transformer secondary output winding is connected to the anode of the 3rd diode, institute
The negative electrode for stating the 3rd diode is connected to the front end of filter inductance, and the rear end of the filter inductance becomes as isolated form double tube positive exciting
The output head anode of parallel operation, the second end of the transformer secondary output winding is connected to the negative electrode of the 4th diode, the described 4th 2
The anode of pole pipe as isolated form two-transistor forward converter negative pole of output end；One inversion reversed phase unit, includes the 4th switch
Pipe, the 5th switching tube, the 3rd electrochemical capacitor, the 4th electrochemical capacitor and the first filter inductance, the drain electrode of the 4th switching tube connect
The output head anode of isolated form two-transistor forward converter is connected to, the source electrode of the 4th switching tube is connected to the leakage of the 5th switching tube
Pole, the source electrode of the 5th switching tube is connected to the negative pole of output end of isolated form two-transistor forward converter, the 4th switching tube
Grid and the 5th switching tube grid be respectively used to access two-way opposite in phase pwm pulse signal, the 4th switching tube
Source electrode be also attached to the front end of the first filter inductance, the positive pole of the 3rd electrochemical capacitor is connected to the leakage of the 4th switching tube
Pole, the negative pole connection rear end ground of the 3rd electrochemical capacitor, the negative pole of the 3rd electrochemical capacitor is also attached to the 4th electrolysis electricity
The positive pole of appearance, the negative pole of the 4th electrochemical capacitor is connected to the source electrode of the 5th switching tube, the rear end of first filter inductance
With the negative pole of the 3rd electrochemical capacitor as inversion reversed phase unit output end.
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.
Preferably, the input rectifying filter unit includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety
Electric capacity and rectifier bridge, the insurance are serially connected with the zero line of socket or live wire, and the front end of the common mode inhibition inductance is parallel to slotting
Seat, the lightning protection resistance is parallel to the front end of common mode inhibition inductance, and the input of the safety electric capacity and rectifier bridge is parallel to
The rear end of common mode inhibition inductance, the output end of the rectifier bridge is parallel with filter capacitor.
Preferably, the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and second
Electrochemical capacitor, the front end of the boost inductance is connected to the output end of input rectifying filter unit, the rear end of the boost inductance
The drain electrode of the 3rd switching tube is connected to, the source electrode of the 3rd switching tube connects front end ground, and the grid of the 3rd switching tube is used for
Access pwm control signal all the way, the anode of drain electrode first commutation diode of connection of the 3rd switching tube, first rectification
The negative electrode of diode as PFC boost unit output end, and first commutation diode negative electrode connect the second electrochemical capacitor
Positive pole, the negative pole of the second electrochemical capacitor connects front end ground.
Preferably, also include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and
The grid of the 3rd switching tube is connected to MCU control unit, and the MCU control unit is used to distinguishing output pwm signal to the
One switching tube, second switch pipe and the 3rd switching tube, to control first switch pipe, second switch pipe and the 3rd switching tube break-make shape
State.
Preferably, an AC sampling unit is also included, the AC sampling unit is connected to input rectifying filter unit
Input and MCU control unit between, the AC sampling unit is used to gather the electricity of input rectifying filter unit AC
Press and feed back to MCU control unit.
Preferably, the AC sampling unit includes amplifier, and two inputs of the amplifier are respectively by current limliting electricity
Hinder and be connected to the input of input rectifying filter unit, the output end of the amplifier is connected to MCU control unit.
Preferably, the first sampling resistor is connected between the source electrode and front end ground of the 3rd switching tube, the described 3rd opens
The source electrode for closing pipe is connected to MCU control unit, makes MCU control unit gather the 3rd switching tube by first sampling resistor
The electric signal of source electrode.
Preferably, a D/C voltage sampling unit is also included, the D/C voltage sampling unit includes for being sequentially connected in series
Two sampling resistors and the 3rd sampling resistor, the front end of second sampling resistor are connected to the rear end of filter inductance, the described 3rd
The rear end of sampling resistor is connected to MCU control unit, and MCU controls are made by second sampling resistor and the 3rd sampling resistor
The electric signal of unit collection filter inductance rear end.
Preferably, the MCU control unit includes single-chip microcomputer and its peripheral circuit.
Intelligent sine voltage change-over circuit based on PFC normal shock half-bridges disclosed by the invention, it not only realizes electricity
The isolation transmission of pressure, effectively improves the PF values of step-up/down conversion equipment, while also improving output voltage quality so that electricity
Pressure transfer process is more safe and reliable.On this basis, the present invention is provided with the first filtering in the output end of inversion reversed phase unit
Inductance, the high-frequency impulse of the alternating current can be filtered using the first filter inductance so that load is being obtained in that the power frequency of high-quality just
String alternating current, and then output voltage quality is improved, to meet power demands.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of input rectifying filter unit and PFC boost unit.
Fig. 2 is the circuit theory diagrams of isolated form two-transistor forward converter and D/C voltage sampling unit.
Fig. 3 is the circuit theory diagrams of inversion reversed phase unit.
Fig. 4 is the circuit theory diagrams of AC sampling unit.
Fig. 5 is the circuit theory diagrams of MCU control unit.
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 sine voltage change-over circuit based on PFC normal shock half-bridges, with reference to Fig. 1 to figure
Shown in 5, it is included：
One input rectifying filter unit 10, its input connection power network, for carrying out rectification and filtering to line voltage；
One PFC boost unit 20, is connected to the output end of input rectifying filter unit 10, single for being filtered to input rectifying
The output voltage of unit 10 carries out boost conversion；
One isolated form two-transistor forward converter 30, includes first switch pipe Q6, second switch pipe Q7, the first diode
D3, the second diode D2, the 3rd diode D5, the 4th diode D8, transformer T1 and filter inductance L3, the first switch pipe
The drain electrode of Q6 is connected to the output end of PFC boost unit 20, and the source electrode of the first switch pipe Q6 is connected to transformer T1 primary
The first end of winding, the second end of the transformer T1 armature windings connects the drain electrode of second switch pipe Q7, the second switch
The source electrode connection front end ground of pipe Q7, the negative electrode of the first diode D3 is connected to the drain electrode of first switch pipe Q6, described first
The anode of diode D3 is connected to the second end of transformer T1 armature windings, and the negative electrode of the second diode D2 is connected to transformation
The first end of device T1 armature windings, the anode of the second diode D2 is connected to the source electrode of second switch pipe Q7, described first
The grid of switching tube Q6 and the grid of second switch pipe Q7 are used to access identical pwm signal, the transformer T1 secondary windings
Centre tap be connected to rear end ground, the first end of the transformer T1 secondary windings is connected to the anode of the 3rd diode D5,
The negative electrode of the 3rd diode D5 is connected to the front end of filter inductance L3, and the rear end of the filter inductance L3 is double as isolated form
The output head anode of pipe forward converter 30, the second end of the transformer T1 secondary windings is connected to the moon of the 4th diode D8
Pole, the anode of the 4th diode D8 as isolated form two-transistor forward converter 30 negative pole of output end；
One inversion reversed phase unit 60, includes the 4th switching tube Q2, the 5th switching tube Q4, the 3rd electrochemical capacitor C3, the 4th
Electrochemical capacitor C4 and the first filter inductance L4, the drain electrode of the 4th switching tube Q2 is connected to isolated form two-transistor forward converter 30
Output head anode, 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 be connected to the negative pole of output end of isolated form two-transistor forward converter 30, 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 source electrode of the 4th switching tube Q2 also connects
The front end of the first filter inductance L4 is connected to, the positive pole of the 3rd electrochemical capacitor C3 is connected to the drain electrode of the 4th switching tube Q2, institute
The negative pole connection rear end ground of the 3rd electrochemical capacitor C3 is stated, the negative pole of the 3rd electrochemical capacitor C3 is also attached to the 4th electrochemical capacitor
The positive pole of C4, the negative pole of the 4th electrochemical capacitor C4 is connected to the source electrode of the 5th switching tube Q4, the first filter inductance L4
Rear end and the 3rd electrochemical capacitor C3 negative pole as inversion reversed phase unit 60 output end.
In above-mentioned sine voltage change-over circuit, rectification and filter are carried out to line voltage using input rectifying filter unit 10
Output ripple DC voltage after ripple, carries out boosting treatment, in isolated form using PFC boost unit 20 to pulsating dc voltage afterwards
In two-transistor forward converter 30, the grid of first switch pipe Q6 and the grid of second switch pipe Q7 are used to access identical PWM letters
Number, when first switch pipe Q6 is simultaneously turned on second switch pipe Q7, the primary coil of transformer T1 is bonded to secondary by magnetic core lotus root
Two coils a, Same Name of Ends in secondary two coils connects together with the heterodoxy of another coil, by the 3rd diode
Positive and negative busbar voltage is formed after D5, the 4th diode D8 rectifications, filter inductance L3 is given and is filtered into direct current output and give inversion paraphase
Unit 60；When first switch pipe Q6 and second switch pipe Q7 is turned off, in order to keep the primary current direction of transformer T1
Identical, now the first diode D3 and the second diode D2 starts working, and carries out magnetic reset to magnetic core, by changing transformer
The turn ratio of T1 primary and secondaries can make secondary voltage be below or above primary input voltage, reach buck or boost purpose.The present invention
The isolation transmission of voltage is not only realized, the PF values of step-up/down conversion equipment is effectively improved, while also improving output voltage
Quality so that voltage conversion process is more safe and reliable.On this basis, the present invention sets in the output end of inversion reversed phase unit 60
The first filter inductance L4 is put, the high-frequency impulse in inversion reversed phase unit output signal can have been filtered using the first filter inductance L4,
So that load is obtained in that the power frequency sinusoidal ac of high-quality, and then output voltage quality is improved, to meet power demands.
Further, Fig. 3 is refer to, the operation principle of inversion reversed phase unit 60 is：When the 4th switching tube Q2 is turned on, the
Four switching tube Q2, load, the 4th electrochemical capacitor C4 form loop, produce first high-frequency impulse level to load, open when the 4th
When closing pipe Q2 closings, continuous current circuit is formed by the 4th electrochemical capacitor C4, the 5th switching tube Q4, the first filter inductance L4；When
Loop is formed by the 5th switching tube Q4, load, the 3rd electrochemical capacitor C3 when five switching tube Q4 are turned on, is formed in load
Second high-frequency impulse level, when the 5th switching tube Q4 is turned off, the body diode of the 4th switching tube Q2, the 3rd electrochemical capacitor
C3, load, the first filter inductance L4 form continuous current circuit.4th switching tube Q2, the high-frequency drive pwm signal of the 5th switching tube Q4
It is the GATE poles for giving the 4th switching tube Q2, the 5th switching tube Q4 after changing through power frequency Sine Modulated again.Due to the 4th switching tube
Q2, the 5th switching tube Q4 are the drive signals after Sine Modulated, so the high frequency arteries and veins after filtering inversion through the first filter inductance L4
Rush level and leave behind power frequency sinusoidal voltage, powering load.The 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 also have simultaneously
The effect of filtering, can constitute DC filtering circuit with filter inductance L3.The control of this inverter circuit is simple, and circuit is only with two
Metal-oxide-semiconductor, it is with low cost.
In the present embodiment, in order to improve switching speed, is connected between the grid and source electrode of the 4th switching tube Q2
Second resistance R23 is connected between the grid and source electrode of one resistance R17, the 5th switching tube Q4.
On importation, the input rectifying filter unit 10 includes socket, insurance F2, lightning protection resistance RV1, common mode
Suppress inductance L1, safety electric capacity CX1 and rectifier bridge DB1, the insurance F2 is serially connected with the zero line of socket or live wire, the common mode
The front end for suppressing inductance L1 is parallel to socket, and the lightning protection resistance RV1 is parallel to the front end of common mode inhibition inductance L1, the safety
The input of electric capacity CX1 and rectifier bridge DB1 is parallel to the rear end of common mode inhibition inductance L1, the output end of the rectifier bridge DB1
It is parallel with filter capacitor C1.
In the present embodiment, refer to Fig. 1, the PFC boost unit 20 include boost inductance L2, the 3rd switching tube Q5,
First commutation diode D1 and the second electrochemical capacitor C2, the front end of the boost inductance L2 is connected to input rectifying filter unit 10
Output end, the rear end of the boost inductance L2 is connected to the drain electrode of the 3rd switching tube Q5, the source electrode of the 3rd switching tube Q5
Front end ground is connect, the grid of the 3rd switching tube Q5 is used to access pwm control signal, the drain electrode of the 3rd switching tube Q5 all the way
Connect the anode of the first commutation diode D1, the negative electrode of the first commutation diode D1 as PFC boost unit 20 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 connects
Front end ground.
In above-mentioned PFC boost unit 20, 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 sine wave that control chip is adopted increases or reduces the ON time of the 3rd switching tube Q5 so that electric current with
Voltage-phase becomes unanimously to improve PF values.
As a kind of preferred embodiment, Fig. 5 is refer to, the present embodiment also includes a MCU control unit 80, and described first opens
Grid, the grid of second switch pipe Q7 and the grid of the 3rd switching tube Q5 for closing pipe Q6 are connected to MCU control unit 80, institute
MCU control unit 80 is stated for distinguishing output pwm signal to first switch pipe Q6, second switch pipe Q7 and the 3rd switching tube Q5,
To control first switch pipe Q6, second switch pipe Q7 and the 3rd switching tube Q5 on off operating modes.Further, the MCU controls are single
Unit 80 includes single-chip microcomputer U1 and its peripheral circuit.
For the ease of monitoring the electric signal of AC, Fig. 4 is refer to, also include an AC sampling unit 70, the friendship
Stream sampling unit 70 is connected between the input of input rectifying filter unit 10 and MCU control unit 80, the AC sampling
Unit 70 is used to gather the voltage of the AC of input rectifying filter unit 10 and feed back to MCU control unit 80.
Further, the AC sampling unit 70 includes two inputs difference of amplifier U9B, the amplifier U9B
The input of input rectifying filter unit 10 is connected to by current-limiting resistance, the output end of the amplifier U9B is connected to MCU controls
Unit processed 80.
For the ease of carrying out Real-time Collection to electric current, is connected between the source electrode and front end ground of the 3rd switching tube Q5
One sampling resistor R2A, the source electrode of the 3rd switching tube Q5 is connected to MCU control unit 80, by first sampling resistor
R2A and make MCU control unit 80 gather the 3rd switching tube Q5 source electrodes electric signal.
As a kind of preferred embodiment, in order to be acquired to DC side electric signal, Fig. 2 is refer to, the present embodiment also includes
There is a D/C voltage sampling unit 40, the D/C voltage sampling unit 40 includes the second sampling resistor R13 and being sequentially connected in series
The front end of three sampling resistor R15, the second sampling resistor R13 is connected to the rear end of filter inductance L3, 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 collection filter inductance L3 of MCU control unit 80 rear ends.
Compared to existing technologies, there is the voltage conversion circuit present invention PF values high, power network to isolate with output end, safety
Property is very high.The present invention can automatically adjust output voltage, and fixed output frequency in input full voltage range, and defeated
Going out voltage is exported with pure sine wave, and automatic shaping function is pressed with to alternating current.Additionally, circuit of the present invention is simple, easy to control,
It includes voltage and current sampling circuit, can effectively 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 sine voltage change-over circuit based on PFC normal shock half-bridges, it is characterised in that include：
One input rectifying filter unit (10), its input connection power network, for carrying out rectification and filtering to line voltage；
One PFC boost unit (20), is connected to the output end of input rectifying filter unit (10), single for being filtered to input rectifying
The output voltage of first (10) carries out boost conversion；
One isolated form two-transistor forward converter (30), includes first switch pipe (Q6), second switch pipe (Q7), the first diode
(D3), the second diode (D2), the 3rd diode (D5), the 4th diode (D8), transformer (T1) and filter inductance (L3), institute
The drain electrode for stating first switch pipe (Q6) is connected to the output end of PFC boost unit (20), the source electrode of the first switch pipe (Q6)
It is connected to the first end of transformer (T1) armature winding, the second end connection second switch pipe of transformer (T1) armature winding
(Q7) drain electrode, the source electrode connection front end ground of the second switch pipe (Q7), the negative electrode of first diode (D3) is connected to
The drain electrode of first switch pipe (Q6), the anode of first diode (D3) is connected to the second of transformer (T1) armature winding
End, the negative electrode of second diode (D2) is connected to the first end of transformer (T1) armature winding, second diode
(D2) anode is connected to the source electrode of second switch pipe (Q7), the grid and second switch pipe (Q7) of the first switch pipe (Q6)
Grid be used to access identical pwm signal, the centre tap of transformer (T1) secondary windings is connected to rear end ground, described
The first end of transformer (T1) secondary windings is connected to the anode of the 3rd diode (D5), the negative electrode of the 3rd diode (D5)
The front end of filter inductance (L3) is connected to, the rear end of the filter inductance (L3) is used as isolated form two-transistor forward converter (30)
Output head anode, the second end of transformer (T1) secondary windings is connected to the negative electrode of the 4th diode (D8), the described 4th
The anode of diode (D8) as isolated form two-transistor forward converter (30) negative pole of output end；
One inversion reversed phase unit (60), include the 4th switching tube (Q2), the 5th switching tube (Q4), the 3rd electrochemical capacitor (C3),
4th electrochemical capacitor (C4) and the first filter inductance (L4), it is two-tube just that the drain electrode of the 4th switching tube (Q2) is connected to isolated form
The output head anode of exciting converter (30), the source electrode of the 4th switching tube (Q2) is connected to the drain electrode of the 5th switching tube (Q4),
The source electrode of the 5th switching tube (Q4) is connected to the negative pole of output end of isolated form two-transistor forward converter (30), and the described 4th opens
The grid of the grid and the 5th switching tube (Q4) that close pipe (Q2) is respectively used to access the pwm pulse signal of two-way opposite in phase, institute
The source electrode for stating the 4th switching tube (Q2) is also attached to the front end of the first filter inductance (L4), 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 (C4), the negative pole connection of the 4th electrochemical capacitor (C4)
In the source electrode of the 5th switching tube (Q4), the negative pole conduct of the rear end and the 3rd electrochemical capacitor (C3) of first filter inductance (L4)
The output end of inversion reversed phase unit (60).
2. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 1, it is characterised in that
First resistor (R17), the grid of the 5th switching tube (Q4) are connected between the grid and source electrode of the 4th switching tube (Q2)
Second resistance (R23) is connected between pole and source electrode.
3. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 1, it is characterised in that
The input rectifying filter unit (10) includes socket, insurance (F2), lightning protection resistance (RV1), common mode inhibition inductance (L1), peace
Rule 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 electricity
The front end for feeling (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
The input of electric capacity (CX1) and rectifier bridge (DB1) is parallel to the rear end of common mode inhibition inductance (L1), the rectifier bridge (DB1)
Output end be parallel with filter capacitor (C1).
4. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 1, it is characterised in that
The PFC boost unit (20) includes boost inductance (L2), the 3rd switching tube (Q5), the first commutation diode (D1) and second
Electrochemical capacitor (C2), the front end of the boost inductance (L2) is connected to the output end of input rectifying filter unit (10), 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,
The grid of the 3rd switching tube (Q5) is used to access pwm control signal all the way, the drain electrode connection of the 3rd switching tube (Q5)
The anode of the first commutation diode (D1), the negative electrode of first commutation diode (D1) is used as the defeated of PFC boost unit (20)
Go out end, and first commutation diode (D1) negative electrode connect the second electrochemical capacitor (C2) positive pole, the second electrochemical capacitor (C2)
Negative pole connect front end ground.
5. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 4, it is characterised in that
Also include a MCU control unit (80), the grid of the first switch pipe (Q6), the grid and the 3rd of second switch pipe (Q7)
The grid of switching tube (Q5) is connected to MCU control unit (80), and the MCU control unit (80) for exporting PWM respectively
Signal to first switch pipe (Q6), second switch pipe (Q7) and the 3rd switching tube (Q5), to control first switch pipe (Q6), second
Switching tube (Q7) and the 3rd switching tube (Q5) on off operating mode.
6. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 5, it is characterised in that
An AC sampling unit (70) is also included, the AC sampling unit (70) is connected to the defeated of input rectifying filter unit (10)
Enter between end and MCU control unit (80), the AC sampling unit (70) is handed over for gathering input rectifying filter unit (10)
Flow the voltage of side and feed back to MCU control unit (80).
7. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 6, it is characterised in that
The AC sampling unit (70) includes amplifier (U9B), and two inputs of the amplifier (U9B) pass through current-limiting resistance respectively
And the input of input rectifying filter unit (10) is connected to, the output end of the amplifier (U9B) is connected to MCU control unit
(80)。
8. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 5, it is characterised in that
The first sampling resistor (R2A), the 3rd switching tube are connected 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.
9. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 5, it is characterised in that
A D/C voltage sampling unit (40) is also included, the D/C voltage sampling unit (40) includes the second sampling electricity being sequentially connected in series
Resistance (R13) and the 3rd sampling resistor (R15), after the front end of second sampling resistor (R13) is connected to filter inductance (L3)
End, the rear end of the 3rd sampling resistor (R15) is connected to MCU control unit (80), by second sampling resistor (R13)
With the 3rd sampling resistor (R15) and make MCU control unit (80) gather filter inductance (L3) rear end electric signal.
10. the intelligent sine voltage change-over circuit of PFC normal shock half-bridges is based on as claimed in claim 5, it is characterised in that
The MCU control unit (80) includes single-chip microcomputer (U1) and its peripheral circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611226229.2A CN106787799A (en) | 2016-12-27 | 2016-12-27 | A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges |
| PCT/CN2017/080988 WO2018120523A1 (en) | 2016-12-27 | 2017-04-19 | Pfc forward conversion half bridge-based smart sine wave voltage conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611226229.2A CN106787799A (en) | 2016-12-27 | 2016-12-27 | A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges |
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| Publication Number | Publication Date |
|---|---|
| CN106787799A true CN106787799A (en) | 2017-05-31 |
Family
ID=58921708
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611226229.2A Pending CN106787799A (en) | 2016-12-27 | 2016-12-27 | A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106787799A (en) |
| WO (1) | WO2018120523A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120522A1 (en) * | 2016-12-27 | 2018-07-05 | 广东百事泰电子商务股份有限公司 | Pfc forward conversion half bridge-based smart modified sine wave voltage conversion circuit |
| CN114301295A (en) * | 2020-10-07 | 2022-04-08 | 浙江杭可仪器有限公司 | Direct-current integrated power supply and design method thereof |
| CN116526438A (en) * | 2023-07-04 | 2023-08-01 | 汉德森工业(天津)有限公司 | Circuit for electrolysis, controller of electrolyzer and electrolyzer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101521467A (en) * | 2008-11-14 | 2009-09-02 | 浙江大学 | High-frequency distribution transformer |
| CN201536275U (en) * | 2009-11-18 | 2010-07-28 | 陆乐 | Multifunctional switch power supply |
| CN204030965U (en) * | 2014-08-12 | 2014-12-17 | 深圳市科瑞爱特科技开发有限公司 | A kind of auxiliary power circuit of three-phase main-frequency Driven by inverter plate |
| CN106208638A (en) * | 2015-04-30 | 2016-12-07 | 神华集团有限责任公司 | Device for converting electric energy and corresponding electric energy management connection system |
| CN206442304U (en) * | 2016-12-27 | 2017-08-25 | 广东百事泰电子商务股份有限公司 | A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533193A (en) * | 2016-12-14 | 2017-03-22 | 广东百事泰电子商务股份有限公司 | PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit |
| CN106533194A (en) * | 2016-12-15 | 2017-03-22 | 广东百事泰电子商务股份有限公司 | PFC forward full-bridge-based intelligent type correction filtering voltage conversion circuit |
-
2016
- 2016-12-27 CN CN201611226229.2A patent/CN106787799A/en active Pending
-
2017
- 2017-04-19 WO PCT/CN2017/080988 patent/WO2018120523A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101521467A (en) * | 2008-11-14 | 2009-09-02 | 浙江大学 | High-frequency distribution transformer |
| CN201536275U (en) * | 2009-11-18 | 2010-07-28 | 陆乐 | Multifunctional switch power supply |
| CN204030965U (en) * | 2014-08-12 | 2014-12-17 | 深圳市科瑞爱特科技开发有限公司 | A kind of auxiliary power circuit of three-phase main-frequency Driven by inverter plate |
| CN106208638A (en) * | 2015-04-30 | 2016-12-07 | 神华集团有限责任公司 | Device for converting electric energy and corresponding electric energy management connection system |
| CN206442304U (en) * | 2016-12-27 | 2017-08-25 | 广东百事泰电子商务股份有限公司 | A kind of intelligent sine voltage change-over circuit based on PFC normal shock half-bridges |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120522A1 (en) * | 2016-12-27 | 2018-07-05 | 广东百事泰电子商务股份有限公司 | Pfc forward conversion half bridge-based smart modified sine wave voltage conversion circuit |
| CN114301295A (en) * | 2020-10-07 | 2022-04-08 | 浙江杭可仪器有限公司 | Direct-current integrated power supply and design method thereof |
| CN116526438A (en) * | 2023-07-04 | 2023-08-01 | 汉德森工业(天津)有限公司 | Circuit for electrolysis, controller of electrolyzer and electrolyzer |
| CN116526438B (en) * | 2023-07-04 | 2023-12-22 | 汉德森工业(天津)有限公司 | Circuit for electrolysis, controller of electrolyzer and electrolyzer |
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| Publication number | Publication date |
|---|---|
| WO2018120523A1 (en) | 2018-07-05 |
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