CN106787806A - Intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge - Google Patents
Intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge Download PDFInfo
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- CN106787806A CN106787806A CN201710003777.7A CN201710003777A CN106787806A CN 106787806 A CN106787806 A CN 106787806A CN 201710003777 A CN201710003777 A CN 201710003777A CN 106787806 A CN106787806 A CN 106787806A
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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
- 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
- H02M1/32—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
- 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
- H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- 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 kind of intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge, it is included：Input block；PFC boost unit；Full-bridge isolated variable unit, include first switch pipe, second switch pipe, 6th switching tube, 7th switching tube, transformer, first diode, second diode and the first filter inductance, the source electrode of the 6th switching tube is connected to the first end of primary winding, the drain electrode of second switch pipe is connected to the second end of primary winding, the source electrode of first switch pipe is connected to the second end of primary winding, the drain electrode of the 7th switching tube is connected to the first end of primary winding, the centre tap of transformer secondary output winding is connected to rear end ground, the anode of the rear end of the first filter inductance and the second diode as full-bridge isolated variable unit output end；Inversion reversed phase unit, its output end is provided with the second filter inductance.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 wave electricity based on PFC, full-bridge and half-bridge
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.In practical application, due to there is switch during voltage conversion
The high speed switching of pipe so that the outlet side of circuit can have certain high-frequency pulse signal, and then the quality of output voltage is influenceed,
Thus it is 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 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, full-bridge and half-bridge, it is included for providing direct current
The input block of voltage, the PFC boost unit that boost conversion is carried out for the output voltage to input block, and：One full-bridge
Isolated variable unit, includes first switch pipe, second switch pipe, the 6th switching tube, the 7th switching tube, transformer, the one or two
Pole pipe, the second diode and the first filter inductance, the drain electrode of the 6th switching tube are connected to the output end of PFC boost unit,
The source electrode of the 6th switching tube is connected to the first end of primary winding, and the drain electrode of the second switch pipe is connected to change
Second end of depressor armature winding, the source electrode of the second switch pipe is connected to front end ground, and the drain electrode of the first switch pipe connects
The output end of PFC boost unit is connected to, the source electrode of the first switch pipe is connected to the second end of primary winding, described
The drain electrode of the 7th switching tube is connected to the first end of primary winding, and the source electrode of the 7th switching tube is connected to front end
Ground, the grid point of the grid of the first switch pipe, the grid of second switch pipe, the grid of the 6th switching tube and the 7th switching tube
Pwm pulse signal Yong Yu not be accessed, the centre tap of the transformer secondary output winding is connected to rear end ground, the transformer secondary output
The first end of winding is connected to the anode of the first diode, and the negative electrode of first diode passes through the first capacitance connection in rear end
Ground, and the negative electrode of first diode is connected to the front end of the first filter inductance, the second end of the transformer secondary output winding connects
The negative electrode of the second diode is connected to, by the second capacitance connection in rear end ground, described first filters the anode of second diode
The anode of the rear end of ripple inductance and the second diode as full-bridge isolated variable unit output end；One inversion reversed phase unit, bag
The 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor, the 4th electrochemical capacitor and the second filter inductance are included, the described 4th opens
The drain electrode for closing pipe is connected to the output head anode of full-bridge isolated variable unit, and the source electrode of the 4th switching tube is connected to the 5th and opens
The drain electrode of pipe is closed, the source electrode of the 5th switching tube is connected to the negative pole of output end of full-bridge isolated variable unit, and the described 4th opens
The grid of the grid and the 5th switching tube that close pipe is respectively used to access the pwm pulse signal of two-way opposite in phase, the 3rd electricity
The positive pole for solving electric capacity is connected to the drain electrode of the 4th switching tube, the negative pole connection rear end ground of the 3rd electrochemical capacitor, the described 3rd
The negative pole of electrochemical capacitor is also attached to the positive pole of the 4th electrochemical capacitor, and the negative pole of the 4th electrochemical capacitor is connected to the 5th switch
The source electrode of pipe, the source electrode of the 4th switching tube is connected to the front end of the second filter inductance, the rear end of second 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 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, the output end of the rectifier bridge is parallel with filter capacitor.
Preferably, the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and second
Electrochemical capacitor, the front end of the boost inductance is connected to the output end of input block, and the rear end of the boost inductance is connected to
The drain electrode of three switching tubes, 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, a MCU control unit, grid, the grid of second switch pipe, of the first switch pipe are also included
The grid of the grid of three switching tubes, the grid of the 6th switching tube and the 7th switching tube is connected to MCU control unit, described
MCU control unit be used for distinguish output pwm signal to first switch pipe, second switch pipe, the 3rd switching tube, the 6th switching tube and
7th switching tube, to control the logical of first switch pipe, second switch pipe, the 3rd switching tube, the 6th switching tube and the 7th switching tube
Disconnected state.
Preferably, an AC sampling unit is also included, the AC sampling unit is connected to the input of input block
Between MCU control unit, the AC sampling unit is used to gather the voltage of input block AC and feed back to MCU controls
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, the second sampling resistor and the 3rd sampling resistor being sequentially connected in series, second sampling resistor are also included
Front end be connected to the output end of the full-bridge isolated variable unit, the rear end of the 3rd sampling resistor is connected to MCU controls
Unit, makes MCU control unit gather the full-bridge isolated variable list by second sampling resistor and the 3rd sampling resistor
The electric signal of unit's output.
Preferably, the MCU control unit includes single-chip microcomputer and its peripheral circuit.
In intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge disclosed by the invention, using PFC liters
Pressure unit carries out boosting treatment to the DC voltage that input block is exported, and exports afterwards to full-bridge isolated variable unit, in full-bridge
In isolated variable unit, when first switch pipe and the 7th switching tube are turned on, electric current is by first switch pipe, primary line
Circle, the 7th switching tube form loop to front end ground, and the voltage of primary winding is lower just upper negative, then by transformer magnetic
Core lotus root is bonded to transformer secondary output, and the second diode sends the second capacitor filtering to by backward voltage, is formed on the second electric capacity
On just lower negative DC voltage；When second switch pipe and the 6th switching tube are turned on, electric current is by second switch pipe, primary
Coil, the 6th switching tube form loop to front end ground, and primary winding voltage is upper just lower negative, then by transformer magnetic
Core lotus root is bonded to transformer secondary output, is at this moment forward voltage by the voltage of the first diode, and is sent to the first electric capacity, first
Just lower negative DC voltage, is so formed generating positive and negative voltage on dc bus on being formed on electric capacity.Wherein, the first electric capacity,
Second electric capacity and the first filter inductance composition filter circuit.And by changing the turn ratio of transformer primary and secondary, can adjust defeated
Go out the height of voltage, and then realize boosting or step-down conversion.Based on said structure, the present invention not only realizes the isolation of voltage
Transmission, and then the PF values of step-up/down conversion equipment are improved, also improve output voltage quality so that voltage conversion process is more
Plus it is safe and reliable.On this basis, the present invention is provided with the second filter inductance in the output end of inversion reversed phase unit, using second
Filter inductance can filter the high-frequency impulse in inversion reversed phase unit output signal so that load is obtained in that the power frequency of high-quality is sinusoidal
Alternating current, and then output voltage quality is improved, to meet power demands.
Brief 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
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, full-bridge and half-bridge, with reference to Fig. 1
Shown in Fig. 3, its include for DC voltage is provided input block 10, carry out for the output voltage to input block 10
The PFC boost unit 20 of boost conversion, and：
One full-bridge isolated variable unit 30, includes first switch pipe Q6, second switch pipe Q7, the 6th switching tube Q8,
Seven switching tube Q9, transformer T1, the first diode D5, the second diode D6 and the first filter inductance L3, the 6th switching tube
The drain electrode of Q8 is connected to the output end of PFC boost unit 20, and the source electrode of the 6th switching tube Q8 is connected to transformer T1 primary
The first end of winding, the drain electrode of the second switch pipe Q7 is connected to the second end of transformer T1 armature windings, and described second opens
The source electrode for closing pipe Q7 is connected to front end ground, and the drain electrode of the first switch pipe Q6 is connected to the output end of PFC boost unit 20, institute
The source electrode for stating first switch pipe Q6 is connected to the second end of transformer T1 armature windings, the drain electrode connection of the 7th switching tube Q9
In the first end of transformer T1 armature windings, the source electrode of the 7th switching tube Q9 is connected to front end ground, the first switch pipe
The grid of Q6, the grid of second switch pipe Q7, the grid of the 6th switching tube Q8 and the grid of the 7th switching tube Q9 are respectively used to connect
Enter pwm pulse signal, the centre tap of the transformer T1 secondary windings is connected to rear end ground, the transformer T1 secondary windings
First end be connected to the anode of the first diode D5, after the negative electrode of the first diode D5 is connected to by the first electric capacity C7
End ground, and the negative electrode of first diode D5 is connected to the front end of the first filter inductance L3, the transformer T1 secondary windings
Second end is connected to the negative electrode of the second diode D6, and the anode of the second diode D6 is connected to rear end by the second electric capacity C8
Ground, the rear end of the first filter inductance L3 and the anode of the second diode D6 as full-bridge isolated variable unit 30 output
End；
One inversion reversed phase unit 40, includes the 4th switching tube Q2, the 5th switching tube Q4, the 3rd electrochemical capacitor C3, the 4th
Electrochemical capacitor C5 and the second filter inductance L4, the drain electrode of the 4th switching tube Q2 is connected to the defeated of full-bridge isolated variable unit 30
Go out proper pole, the source electrode of the 4th switching tube Q2 is connected to the drain electrode of the 5th switching tube Q4, the source of the 5th switching tube Q4
Pole is connected to the negative pole of output end of full-bridge isolated variable unit 30, the grid of the 4th switching tube Q2 and the 5th switching tube Q4's
Grid is respectively used to access the pwm pulse signal of two-way opposite in phase, and the positive pole of the 3rd electrochemical capacitor C3 is connected to the 4th
The drain electrode of switching tube Q2, the negative pole connection rear end ground of the 3rd electrochemical capacitor C3, the negative pole of the 3rd electrochemical capacitor C3 is also
The positive pole of the 4th electrochemical capacitor C5 is connected to, the negative pole of the 4th electrochemical capacitor C5 is connected to the source electrode of the 5th switching tube Q4,
The source electrode of the 4th switching tube Q2 is connected to the front end of the second filter inductance L4, the rear end of the second filter inductance L4 and
The negative pole of three electrochemical capacitor C3 as inversion reversed phase unit 40 output end.
In above-mentioned sine voltage change-over circuit, the DC voltage exported to input block 10 using PFC boost unit 20
Boosting treatment is carried out, is exported afterwards to full-bridge isolated variable unit 30, in full-bridge isolated variable unit 30, when first switch pipe
When Q6 and the 7th switching tube Q9 is turned on, electric current is by first switch pipe Q6, transformer T1 primary coils, the 7th switching tube Q9 to front end
Ground forms loop, and the voltage of transformer T1 armature windings is lower just upper negative, is then bonded to transformer by transformer T1 magnetic core lotus roots
Secondary, the second diode D6 sends the second electric capacity C8 to and filters by backward voltage, forms just lower negative on the second electric capacity C8
DC voltage；When second switch pipe Q7 and the 6th switching tube Q8 is turned on, electric current is primary by second switch pipe Q7, transformer T1
Coil, the 6th switching tube Q8 form loop to front end ground, and transformer T1 primary winding voltages are upper just lower negative, then by transformation
Device T1 magnetic core lotus roots are bonded to transformer secondary output, are at this moment forward voltage by the voltage of the first diode D5, and be sent to the first electricity
Hold C7, just lower negative DC voltage is formed on the first electric capacity C7, generating positive and negative voltage is so formed on dc bus.Its
In, the first electric capacity C7, the second electric capacity C8 and the first filter inductance L3 constitute filter circuit.And by changing transformer T1 primary and secondaries
Turn ratio, the height of output voltage can be adjusted, and then realize boosting or step-down conversion.Based on said structure, the present invention
The isolation transmission of voltage is not only realized, and then improves the PF values of step-up/down conversion equipment, also improve output voltage matter
Amount so that voltage conversion process is more safe and reliable.On this basis, the present invention is set in the output end of inversion reversed phase unit 40
Second filter inductance L4, using the second filter inductance L4 can filter the high-frequency impulse in inversion reversed phase unit output signal, make
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.
First resistor R17 further 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 40, when the 4th switching tube Q2 is turned on, the 4th switching tube Q2, load, the 4th electrolysis
Electric capacity C5 forms loop, produces first high-frequency impulse level to load, when the 4th switching tube Q2 is closed, by the 4th electrolysis
Electric capacity C5, the body diode of the 5th switching tube Q4, the second filter inductance L4 form continuous current circuit；When the 5th switching tube Q4 is turned on
Loop is formed by the 5th switching tube Q4, load, the 3rd electrochemical capacitor C3, second high-frequency electrical pulses is formed in load
It is flat, 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 second filtered electrical
Sense L4 forms continuous current circuit.4th switching tube Q2, the high-frequency drive pwm signal of the 5th switching tube Q4 change through power frequency Sine Modulated
Give the 4th switching tube Q2, the GATE poles of the 5th switching tube Q4 again afterwards.4th switching tube Q2, the 5th switching tube Q4 drive signals are
Modulated through power frequency, it is by sinusoidal variations to flow through the 4th switching tube Q2, the electric current of the 5th switching tube Q4.Due to the second filtered electrical
Sense L4 has high-impedance behavior to high-frequency impulse, so high fdrequency component is filtered by the second filter inductance L4, is just formed in load
Power frequency sinusoidal voltage.The 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C5 also have the effect of filtering simultaneously, can be with first
Filter inductance L3 constitutes DC filtering circuit.The control of this inverter circuit is simple, and circuit is with low cost only with two metal-oxide-semiconductors.
On importation, as described in Figure 1, the input block 10 includes socket, insures F2, lightning protection resistance RV1, is total to
Mould suppresses inductance L1, safety electric capacity CX1 and rectifier bridge DB1, and the insurance F2 is serially connected with the zero line of socket or live wire, described common
The front end that mould suppresses inductance L1 is parallel to socket, and the lightning protection resistance RV1 is parallel to the front end of common mode inhibition inductance L1, the peace
The input for advising electric capacity CX1 and rectifier bridge DB1 is parallel to the rear end of common mode inhibition inductance L1, the output of the rectifier bridge DB1
End is parallel with filter capacitor C1.
In the present embodiment, the PFC boost unit 20 includes boost inductance L2, the 3rd switching tube Q5, the first rectification two
The front end of pole pipe D1 and the second electrochemical capacitor C2, the boost inductance L2 is connected to the output end of input block 10, the boosting
The rear end of 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 described 3rd
The grid of switching tube Q5 is used to access pwm control signal all the way, drain electrode connection the first rectification two pole of the 3rd switching tube Q5
The anode of pipe D1, the negative electrode of the first commutation diode D1 as PFC boost unit 20 output end, and first rectification two
The negative electrode of pole pipe 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 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 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.
As a kind of preferred embodiment, Fig. 3 is refer to, the present embodiment also includes a MCU control unit 80, and described first opens
The grid of pipe Q6, the grid of second switch pipe Q7, the grid of the 3rd switching tube Q5, the grid and the 7th of the 6th switching tube Q8 is closed to open
The grid for closing pipe Q9 is connected to MCU control unit 80, and the MCU control unit 80 is used to distinguishing output pwm signal to the
One switching tube Q6, second switch pipe Q7, the 3rd switching tube Q5, the 6th switching tube Q8 and the 7th switching tube Q9, to control first to open
Close pipe Q6, second switch pipe Q7, the 3rd switching tube Q5, the on off operating mode of the 6th switching tube Q8 and the 7th switching tube Q9.Further
Ground, the MCU control unit 80 includes single-chip microcomputer U1 and its peripheral circuit.
For the ease of monitoring the electric signal of AC, as shown in Fig. 2 also including 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 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.
Used as a kind of preferred embodiment, in order to be acquired to DC side electric signal, the present embodiment is also included and is sequentially connected in series
The second sampling resistor R13 and the 3rd sampling resistor R15, the front end of the second sampling resistor R13 be connected to the full-bridge every
From the output end of converter unit 30, the rear end of the 3rd sampling resistor R15 is connected to MCU control unit 80, by described
Two sampling resistor R13 and the 3rd sampling resistor R15 and make MCU control unit 80 gather the full-bridge isolated variable unit 30 and export
Electric signal.
Intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge 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, with sinewave output, automatic shaping function to be 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 sine voltage change-over circuit based on PFC, full-bridge and half-bridge, it is characterised in that include for
The input block (10) of DC voltage is provided, carrying out the PFC boost of boost conversion for the output voltage to input block (10)
Unit (20), and：
One full-bridge isolated variable unit (30), includes first switch pipe (Q6), second switch pipe (Q7), the 6th switching tube
(Q8), the 7th switching tube (Q9), transformer (T1), the first diode (D5), the second diode (D6) and the first filter inductance
(L3), the drain electrode of the 6th switching tube (Q8) is connected to the output end of PFC boost unit (20), the 6th switching tube (Q8)
Source electrode be connected to the first end of transformer (T1) armature winding, the drain electrode of the second switch pipe (Q7) is connected to transformer
(T1) the second end of armature winding, the source electrode of the second switch pipe (Q7) is connected to front end ground, the first switch pipe (Q6)
Drain electrode be connected to the output end of PFC boost unit (20), the source electrode of the first switch pipe (Q6) is connected to transformer (T1)
Second end of armature winding, the drain electrode of the 7th switching tube (Q9) is connected to the first end of transformer (T1) armature winding, institute
The source electrode for stating the 7th switching tube (Q9) is connected to front end ground, the grid of the first switch pipe (Q6), second switch pipe (Q7)
The grid of grid, the grid of the 6th switching tube (Q8) and the 7th switching tube (Q9) is respectively used to access pwm pulse signal, 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 anode of one diode (D5), the negative electrode of first diode (D5) is connected to rear end ground by the first electric capacity (C7), and should
The negative electrode of the first diode (D5) is connected to the front end of the first filter inductance (L3), the second of transformer (T1) secondary windings
End is connected to the negative electrode of the second diode (D6), after the anode of second diode (D6) is connected to by the second electric capacity (C8)
End ground, the rear end of first filter inductance (L3) and the anode of the second diode (D6) are used as full-bridge isolated variable unit (30)
Output end；
One inversion reversed phase unit (40), include the 4th switching tube (Q2), the 5th switching tube (Q4), the 3rd electrochemical capacitor (C3),
4th electrochemical capacitor (C5) and the second filter inductance (L4), the drain electrode of the 4th switching tube (Q2) are connected to full-bridge isolated variable
The output head anode of unit (30), the source electrode of the 4th switching tube (Q2) is connected to the drain electrode of the 5th switching tube (Q4), described
The source electrode of the 5th switching tube (Q4) is connected to the negative pole of output end of full-bridge isolated variable unit (30), the 4th switching tube (Q2)
Grid and the 5th switching tube (Q4) grid be respectively used to access two-way opposite in phase pwm pulse signal, it is described 3rd electricity
The positive pole of solution electric capacity (C3) is connected to the drain electrode of the 4th switching tube (Q2), the negative pole connection rear end of the 3rd electrochemical capacitor (C3)
Ground, the negative pole of the 3rd electrochemical capacitor (C3) is also attached to the positive pole of the 4th electrochemical capacitor (C5), the 4th electrochemical capacitor
(C5) negative pole is connected to the source electrode of the 5th switching tube (Q4), and the source electrode of the 4th switching tube (Q2) is connected to the second filtered electrical
Feel the front end of (L4), the rear end of second filter inductance (L4) and the negative pole of the 3rd electrochemical capacitor (C3) are used as inversion paraphase list
The output end of first (40).
2. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge is based on as claimed in claim 1, and its feature exists
In, first resistor (R17) is connected between the grid and source electrode of the 4th switching tube (Q2), the 5th switching tube (Q4)
Second resistance (R23) is connected between grid and source electrode.
3. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge 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), the rectifier bridge (DB1)
Output end is parallel with filter capacitor (C1).
4. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge is based on as claimed in claim 1, and its feature exists
In, the PFC boost unit (20) 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 (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)
Connect front end ground.
5. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge is based on as claimed in claim 4, and its feature exists
In also including a MCU control unit (80), grid, the grid of second switch pipe (Q7), of the first switch pipe (Q6)
The grid of the grid of three switching tubes (Q5), the grid of the 6th switching tube (Q8) and the 7th switching tube (Q9) is connected to MCU controls
Unit (80) processed, the MCU control unit (80) is for distinguishing output pwm signal to first switch pipe (Q6), second switch pipe
(Q7), the 3rd switching tube (Q5), the 6th switching tube (Q8) and the 7th switching tube (Q9), to control first switch pipe (Q6), second
The on off operating mode of switching tube (Q7), the 3rd switching tube (Q5), the 6th switching tube (Q8) and the 7th switching tube (Q9).
6. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge 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 sine voltage change-over circuit of PFC, full-bridge and half-bridge is based on as claimed in claim 6, and its feature exists
In the AC sampling unit (70) includes amplifier (U9B), and two inputs of the amplifier (U9B) pass through current limliting respectively
Resistance and be connected to the input of input rectifying filter unit (10), it is single that the output end of the amplifier (U9B) is connected to MCU controls
First (80).
8. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge 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.
9. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge is based on as claimed in claim 5, and its feature exists
In also including the second sampling resistor (R13) and the 3rd sampling resistor (R15) being sequentially connected in series, second sampling resistor
(R13) front end is connected to the output end of the full-bridge isolated variable unit (30), the rear end of the 3rd sampling resistor (R15)
MCU control unit (80) is connected to, MCU controls are made by second sampling resistor (R13) and the 3rd sampling resistor (R15)
Unit (80) gathers the electric signal of full-bridge isolated variable unit (30) output.
10. the intelligent sine voltage change-over circuit of PFC, full-bridge and half-bridge is based on as claimed in claim 5, and its feature exists
In the MCU control unit (80) includes single-chip microcomputer (U1) and its peripheral circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003777.7A CN106787806A (en) | 2017-01-04 | 2017-01-04 | Intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge |
| PCT/CN2017/080981 WO2018126555A1 (en) | 2017-01-04 | 2017-04-19 | Smart sine wave voltage conversion circuit based on pfc, full bridge and half bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003777.7A CN106787806A (en) | 2017-01-04 | 2017-01-04 | Intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106787806A true CN106787806A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710003777.7A Pending CN106787806A (en) | 2017-01-04 | 2017-01-04 | Intelligent sine voltage change-over circuit based on PFC, full-bridge and half-bridge |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106787806A (en) |
| WO (1) | WO2018126555A1 (en) |
Cited By (2)
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| WO2018126554A1 (en) * | 2017-01-04 | 2018-07-12 | 广东百事泰电子商务股份有限公司 | Smart correction wave voltage conversion circuit based on pfc, full bridge, and half bridge |
| CN109799328A (en) * | 2018-12-07 | 2019-05-24 | 上海厦泰生物科技有限公司 | A kind of temperature controlled sample incubation device of band |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112684238B (en) * | 2021-01-08 | 2024-05-24 | 四川湖山电器股份有限公司 | Switch power tube load current real-time monitoring circuit and monitoring system |
| CN114189964B (en) * | 2022-02-17 | 2022-05-03 | 深圳市暗能量电源有限公司 | Low-loss MOS phase-cut intelligent high-power silicon controlled rectifier dimmer |
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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 |
| 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 |
| CN101902137A (en) * | 2009-05-29 | 2010-12-01 | 索尼公司 | Supply unit |
| 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 |
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| WO2018126554A1 (en) * | 2017-01-04 | 2018-07-12 | 广东百事泰电子商务股份有限公司 | Smart correction wave voltage conversion circuit based on pfc, full bridge, and half bridge |
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| WO2018126555A1 (en) | 2018-07-12 |
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