CN206422704U - Intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations - Google Patents
Intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations Download PDFInfo
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- CN206422704U CN206422704U CN201720036776.8U CN201720036776U CN206422704U CN 206422704 U CN206422704 U CN 206422704U CN 201720036776 U CN201720036776 U CN 201720036776U CN 206422704 U CN206422704 U CN 206422704U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a kind of intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations, it includes：Input rectifying filter unit；PFC boost unit；Interleaving inverse excitation isolated variable unit, including first switch pipe, second switch pipe, the first transformer, the second transformer, the first diode, the second diode, the 3rd diode and the 4th diode；DC filter units, including the first electric capacity and the second electric capacity, the negative electrode of the 3rd diode is by the first capacitance connection in rear end, and the anode of the 4th diode is by the second capacitance connection in rear end；The negative pole of inversion reversed phase unit, including the 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor, the 4th electrochemical capacitor and filter inductance, the rear end of filter inductance and the 3rd electrochemical capacitor as inversion reversed phase unit output end.The utility model can filter out high-frequency impulse using filter inductance, load is obtained the power frequency sinusoidal ac of high-quality, while reducing circuit cost.
Description
Technical field
The utility model is related to voltage conversion circuit, more particularly to a kind of intelligent half-bridge based on PFC interleaving inverse excitations is just
String wave voltage change-over circuit.
Background technology
In the prior art, it is otherwise known as travelling insert row by the AC intelligent boost-buck conversion equipments for turning AC, in the device, voltage
Change-over circuit is its Key Circuit, be it is a kind of can realize AC-AC conversion circuit, can AC-AC conversion in realize buck
And the function of burning voltage and frequency.But just most of meaningful formula equipment Market is electric for the topology of non-isolation type by current AC-AC
Road, and PF values are low, output voltage quality is low, security reliability is poor.Particularly during voltage conversion, more line can be produced
Wave interference, and then influence quality of voltage.In addition, existing sine voltage change-over circuit is present, circuit structure is complicated, and response is fast
The defect such as degree is slow, cost is higher.In practical application, due to there is the switching of the high speed of switching tube during voltage conversion so that electricity
The outlet side on road can have certain high-frequency pulse signal, and then influence the quality of output voltage, thus be difficult to meet conversion will
Ask.
Utility model content
The technical problems to be solved in the utility model is, can reduce circuit there is provided one kind in view of the shortcomings of the prior art
In ripple, circuit structure, reduction circuit cost can be simplified, high-frequency crosstalk can be filtered out, output voltage quality can be improved, and pacify
The complete reliable intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that.
A kind of intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations, it includes for power network
Voltage carries out rectification and the input rectifying filter unit filtered, boosted for the output voltage to input rectifying filter unit
The PFC boost unit of conversion, and：One interleaving inverse excitation isolated variable unit, includes first switch pipe, second switch pipe,
One transformer, the second transformer, the first diode, the second diode, the 3rd diode and the 4th diode, first transformation
The first end of device armature winding is connected to the output end of PFC boost unit, and the second end of the first primary winding connects
The drain electrode of first switch pipe is connected to, with being connected to front end, the drain electrode of the first switch pipe connects the source electrode of the first switch pipe
The anode of the first diode is connected to, the negative electrode of first diode is connected to the output of PFC boost unit by first resistor
End, the first resistor is parallel with the 3rd electric capacity, and the first end of the second primary winding is connected to PFC boost unit
Output end, the second end of the second primary winding is connected to the drain electrode of second switch pipe, the second switch pipe
Source electrode with being connected to front end, the drain electrode of the second switch pipe is connected to the anode of the second diode, second diode
Negative electrode the output end of PFC boost unit is connected to by second resistance, the second resistance is parallel with the 4th electric capacity, described
The grid of one switching tube and the grid of second switch pipe are respectively used to access the pwm pulse signal of two-way opposite in phase, described the
The first end of one transformer secondary output winding is connected to the anode of the 3rd diode, the second end of the first transformer secondary output winding
With being connected to rear end, the first end of the second transformer secondary output winding with being connected to rear end, second transformer secondary output around
Second end of group is connected to the negative electrode of the 4th diode, and the negative electrode of the 3rd diode and the anode of the 4th diode are used as friendship
The output end of wrong flyback isolated variable unit；One DC filter units, include the first electric capacity and the second electric capacity, the three or two pole
The negative electrode of pipe is by the first capacitance connection in rear end, and the anode of the 4th diode is by the second capacitance connection in rear end
Ground；One inversion reversed phase unit, includes the 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor, the 4th electrochemical capacitor and filtering
Inductance, the drain electrode of the 4th switching tube is connected to the output head anode of interleaving inverse excitation isolated variable unit, the 4th switch
The source electrode of pipe is connected to the drain electrode of the 5th switching tube, and the source electrode of the 5th switching tube is connected to interleaving inverse excitation isolated variable unit
Negative pole of output end, the grid of the 4th switching tube and the grid of the 5th switching tube are respectively used to access two-way opposite in phase
Pwm pulse signal, the source electrode of the 4th switching tube is also attached to the front end of filter inductance, the positive pole of the 3rd electrochemical capacitor
Be connected to the drain electrode of the 4th switching tube, the negative pole connection rear end of the 3rd electrochemical capacitor, the 3rd electrochemical capacitor it is negative
Pole is also attached to the positive pole of the 4th electrochemical capacitor, and the negative pole of the 4th electrochemical capacitor is connected to the source electrode of the 5th switching tube, institute
The rear end of filter inductance and the negative pole of the 3rd electrochemical capacitor are stated as the output end of inversion reversed phase unit.
Preferably, first resistor is connected between the grid and source electrode of the 4th switching tube, the 5th switching tube
Second resistance is connected between grid and source electrode.
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, with connecing front end, the grid of the 3rd switching tube is used for the source electrode of the 3rd switching tube
Access pwm control signal all the way, the anode of drain electrode the 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 is with connecing front end.
Preferably, also include a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and
The grid of 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, the MCU control unit includes single-chip microcomputer and its peripheral circuit.
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 pass through current limliting electricity respectively
The input of input rectifying filter unit is hindered and is connected to, the output end of the amplifier is connected to MCU control unit.
Preferably, the first sampling resistor is connected between the source electrode and front end ground of the 3rd switching tube, the described 3rd opens
The source electrode for closing pipe is connected to MCU control unit, makes MCU control unit gather the 3rd switching tube by first sampling resistor
The electric signal of source electrode.
Preferably, a D/C voltage sampling unit is also included, the D/C voltage sampling unit includes be sequentially connected in series
Two sampling resistors and the 3rd sampling resistor, the front end of second sampling resistor are connected to the defeated of interleaving inverse excitation isolated variable unit
Go out end, the rear end of the 3rd sampling resistor is connected to MCU control unit, by second sampling resistor and the 3rd sampling electricity
The electric signal for hindering and making MCU control unit gather the output of interleaving inverse excitation isolated variable unit.
In intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations disclosed in the utility model, utilize
Input rectifying filter unit carries out output ripple DC voltage after rectification and filtering to line voltage, and PFC boost list is utilized afterwards
Member carries out boosting processing to pulsating dc voltage, and in interleaving inverse excitation isolated variable unit, wherein first switch pipe is opened with second
Pipe interaction conducting is closed, second switch pipe ends when first switch pipe is turned on, and electric current is opened by the first primary winding, first
Close pipe and loop is formed to front end, the first primary winding starts energy storage；When second switch pipe is turned on, first switch pipe
Cut-off, electric current by the second primary winding, second switch pipe, constitute to front end loop, the second primary winding is opened
Beginning energy storage, while the first primary winding is bonded to secondary windings by the first magnetic core of transformer lotus root, then through the 3rd diode
Charged to the first electric capacity, forward voltage is formed on the first electric capacity；Then first switch pipe is turned on again, and second switch pipe is cut
Only, the first transformer energy storage, the second transformer secondary output winding is charged by the 4th diode to the second electric capacity, on the second electric capacity
Form negative voltage；Positive negative dc voltage is so formed on dc bus.The first diode in foregoing circuit, second
Diode, first resistor, second resistance, the 3rd electric capacity, the 4th electric capacity are respectively the absorption of first switch pipe and second switch pipe
Circuit, for the peak voltage for absorbing the first transformer, the leakage inductance of the second transformer is produced, to subtract the voltage stress of switching tube.
Above-mentioned interleaving inverse excitation isolated location achieves following beneficial effect：As a result of interaction conducting so that the electric current line in circuit
Ripple is smaller, using relatively flexibly, while EMI, EMC in circuit disturb smaller, circuit work frequency higher, it is thus possible to improve
Power density, in addition, can change output voltage by the primary and secondary turn ratio of the first transformer of change, the second transformer, enters
And realize boosting or be depressured.Based on These characteristics, the utility model achieves the ripple that can be reduced in circuit, can simplify circuit knot
Structure, reduction circuit cost, it can improve output voltage quality, and the beneficial effect such as safe and reliable.On this basis, this practicality is new
Type is provided with filter inductance in the output end of inversion reversed phase unit, and the high frequency arteries and veins of the alternating current can be filtered out using filter inductance
Punching so that load results in the power frequency sinusoidal ac of high-quality, and then improves output voltage quality, to meet power demands.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of sine voltage change-over circuit.
Fig. 2 is the circuit theory diagrams of AC sampling unit in the utility model preferred embodiment.
Fig. 3 is the circuit theory diagrams of MCU control unit in the utility model preferred embodiment.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and examples.
The utility model discloses a kind of intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations, knot
Close shown in Fig. 1 to Fig. 3, it includes for carrying out rectification and the input rectifying filter unit 10 filtered to line voltage, being used for
The PFC boost unit 20 of boost conversion is carried out to the output voltage of input rectifying filter unit 10, and：
One interleaving inverse excitation isolated variable unit 30, includes first switch pipe Q6, second switch pipe Q7, the first transformer
T1, the second transformer T2, the first diode D6, the second diode D5, the 3rd diode D7 and the 4th diode D8, described first
The first end of transformer T1 armature windings is connected to the output end of PFC boost unit 20, the first transformer T1 armature windings
The second end be connected to first switch pipe Q6 drain electrode, the source electrode of the first switch pipe Q6 with being connected to front end, described first
Switching tube Q6 drain electrode is connected to the first diode D6 anode, and the negative electrode of the first diode D6 passes through first resistor R26
The output end of PFC boost unit 20 is connected to, the first resistor R26 is parallel with the 3rd electric capacity C5, the second transformer T2
The first end of armature winding is connected to the output end of PFC boost unit 20, the second end of the second transformer T2 armature windings
Be connected to second switch pipe Q7 drain electrode, the source electrode of the second switch pipe Q7 with being connected to front end, the second switch pipe Q7
Drain electrode be connected to the second diode D5 anode, the negative electrode of the second diode D5 is connected to PFC by second resistance R27
The output end of boosting unit 20, the second resistance R27 is parallel with the 4th electric capacity C6, the grid of the first switch pipe Q6 and
Two switching tube Q7 grid be respectively used to access two-way opposite in phase pwm pulse signal, described T1 level of first transformer around
The first end of group is connected to the 3rd diode D7 anode, and the second end of the first transformer T1 secondary windings is connected to rear end
Ground, the first end of the second transformer T2 secondary windings with being connected to rear end, the of the second transformer T2 secondary windings
Two ends are connected to the 4th diode D8 negative electrode, and the negative electrode of the 3rd diode D7 and the 4th diode D8 anode are used as friendship
The output end of wrong flyback isolated variable unit 30；
One DC filter units 40, the negative electrode for including the first electric capacity C7 and the second electric capacity C8, the 3rd diode D7 leads to
Cross the first electric capacity C7 with being connected to rear end, the anode of the 4th diode D8 by the second electric capacity C8 with being connected to rear 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 filter inductance L3, the drain electrode of the 4th switching tube Q2 is connected to the defeated of interleaving inverse excitation isolated variable unit 30
Go out proper pole, the source electrode of the 4th switching tube Q2 is connected to the 5th switching tube Q4 drain electrode, the source of the 5th switching tube Q4
Pole is connected to the negative pole of output end of interleaving inverse excitation isolated variable unit 30, the grid and the 5th switching tube of the 4th switching tube Q2
Q4 grid 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 is also attached to
Filter inductance L3 front end, the positive pole of the 3rd electrochemical capacitor C3 is connected to the 4th switching tube Q2 drain electrode, the 3rd electricity
With solving electric capacity C3 negative pole connection rear end, the negative pole of the 3rd electrochemical capacitor C3 is being also attached to the 4th electrochemical capacitor C4 just
Pole, the negative pole of the 4th electrochemical capacitor C4 is connected to the 5th switching tube Q4 source electrode, the rear end of the filter inductance L3 and
Three 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 processing using PFC boost unit 20 to pulsating dc voltage afterwards, staggeredly anti-
Swash in isolated variable unit 30, wherein first switch pipe Q6 interacts conducting with second switch pipe Q7, when first switch pipe Q6 conductings
When second switch pipe Q7 cut-off, electric current by the first transformer T1 armature windings, form loop first switch pipe Q6 to front end, the
One transformer T1 armature windings start energy storage；When second switch pipe Q7 is turned on, first switch pipe Q6 cut-offs, electric current is become by second
Depressor T2 armature windings, second switch pipe Q7, loop is constituted to front end, the second transformer T2 armature windings start energy storage, simultaneously
First transformer T1 armature windings are bonded to secondary windings by the first transformer T1 magnetic core lotus roots, then through the 3rd diode D7 to first
Electric capacity C7 is charged, and forward voltage is formed on the first electric capacity C7；Then first switch pipe Q6 is turned on again, and second switch pipe Q7 is cut
Only, the first transformer T1 energy storage, the second transformer T2 secondary windings is charged by the 4th diode D8 to the second electric capacity C8,
Negative voltage is formed on two electric capacity C8；Positive negative dc voltage is so formed on dc bus.First in foregoing circuit
Diode D6, the second diode D5, first resistor R26, second resistance R27, the 3rd electric capacity C5, the 4th electric capacity C6 are respectively first
Switching tube Q6 and second switch pipe Q7 absorbing circuit, for absorbing the first transformer T1, the second transformer T2 leakage inductance generation
Peak voltage, to subtract the voltage stress of switching tube.Above-mentioned interleaving inverse excitation isolated location achieves following beneficial effect：Due to adopting
With interactive conducting so that current ripples in circuit are smaller, using relatively flexibly, at the same EMI, EMC interference in circuit compared with
Small, circuit work frequency is higher, it is thus possible to improve power density, in addition, by changing the first transformer T1, the second transformer
T2 primary and secondary turn ratio can change output voltage, and then realize boosting or be depressured.Based on These characteristics, the utility model takes
The ripple that can be reduced in circuit was obtained, circuit structure, reduction circuit cost can be simplified, output voltage quality can be improved, and was pacified
The full beneficial effect such as reliable.On this basis, the utility model is provided with filter inductance in the output end of inversion reversed phase unit 60
L3, the high-frequency impulse in alternating current can be filtered out using filter inductance L3 so that load results in the power frequency simple alternating current of high-quality
Electricity, and then output voltage quality is improved, to meet power demands.
Further, first resistor R17 is connected between the grid and source electrode of the 4th switching tube Q2, the described 5th opens
Second resistance R23 is connected between the grid and source electrode that close pipe Q4.
In above-mentioned inversion reversed phase unit 60, when the 4th switching tube Q2 is turned on, the 4th switching tube Q2, load, the 4th electrolysis
Electric capacity C4 formation loop, produces first high-frequency impulse level to load, when the 4th switching tube Q2 is closed, and passes through the 4th electrolysis
Electric capacity C4, the 5th switching tube Q4 body diode, filter inductance L3 formation continuous current circuits；Pass through when the 5th switching tube Q4 is turned on
5th switching tube Q4, load, the 3rd electrochemical capacitor C3 formation loop, are formed second high-frequency impulse level in load,
When the 5th switching tube Q4 is turned off, the 4th switching tube Q2 body diode, the 3rd electrochemical capacitor C3, load, filter inductance L3 shapes
Into continuous current circuit.4th switching tube Q2, the 5th switching tube Q4 high-frequency drive pwm signal are given again after power frequency modulation variation
4th switching tube Q2, the 5th switching tube Q4 GATE poles.4th switching tube Q2, the 5th switching tube Q4 drive signals are adjusted through power frequency
System, it is by sinusoidal variations to flow through the 4th switching tube Q2, the 5th switching tube Q4 electric current.Because filter inductance L3 is to high frequency arteries and veins
There is high resistant to do characteristic for punching, so high fdrequency component is filtered out by filter inductance L3, power frequency sinusoidal ac is formed in load
Pressure.The 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 also have the effect of filtering simultaneously, can be with filter inductance L3 composition direct current filters
Wave circuit.Inverter circuit control is simple, and circuit is with low cost only with two metal-oxide-semiconductors.
On importation, as shown in figure 1, the input rectifying filter unit 10 includes socket, insurance F2, thunder-lightning
Resistance RV1, common mode inhibition inductance L1, safety electric capacity CX1 and rectifier bridge DB1, the insurance F2 are serially connected with the zero line or live wire of socket
On, the front end of the common mode inhibition inductance L1 is parallel to socket, and the lightning protection resistance RV1 is parallel to before common mode inhibition inductance L1
End, the input of the safety electric capacity CX1 and rectifier bridge DB1 is parallel to common mode inhibition inductance L1 rear end, the rectifier bridge
DB1 output end is parallel with filter capacitor C1.
On boosting part, the PFC boost unit 20 includes boost inductance L2, the 3rd switching tube Q5, the first rectification
Diode D1 and the second electrochemical capacitor C2, the boost inductance L2 front end are connected to the output of input rectifying filter unit 10
End, the rear end of the boost inductance L2 is connected to the 3rd switching tube Q5 drain electrode, 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 accessing pwm control signal all the way, the drain electrode connection of the 3rd switching tube Q5 the
One commutation diode D1 anode, the negative electrode of the first commutation diode D1, and should as the output end of PFC boost unit 20
First commutation diode D1 negative electrode connects the second electrochemical capacitor C2 positive pole, and the second electrochemical capacitor C2 negative pole is with connecing front end.
Above-mentioned PFC boost unit 20, when sampling filter capacitor C1 output half-wave alternating voltages, PFC enters boost mode,
Turn the PF values that AC is intelligently depressured conversion topologies circuit to improve AC, be by the second filtered voltages of electrochemical capacitor C2 after boosting
400V, specific boosting principle is as follows：When 3rd switching tube Q5 is turned on, the boosted inductance L2 of electric current on filter capacitor C1, the
Three switching tube Q5 to GND formation loop, boost inductance L2 storage energy；When the 3rd switching tube Q5 is turned off, meeting on boost inductance
The induced electromotive force more much higher than input voltage is formed, induced electromotive force forms unidirectional pulse electricity after carrying out rectification through continued flow tube D1
Pressure gives the second electrochemical capacitor C2 electric capacity and enters filtering again, is filtered into 400V DC voltage.And the 3rd switching tube Q5 is basis
Input AC amendment ripple that control chip is adopted changes to increase or reduce the 3rd switching tube Q5 ON time so that electric current with
Voltage-phase becomes unanimously to improve PF values.
As a kind of preferred embodiment, Fig. 3 is refer to, the present embodiment also includes a MCU control unit 80, and described first opens
Grid, second switch pipe Q7 grid and the 3rd switching tube Q5 grid for closing pipe Q6 are connected to MCU control unit 80, institute
Stating MCU control unit 80 is used to distinguish 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
Member 80 includes single-chip microcomputer U1 and its peripheral circuit.
For the ease of monitoring the electric signal of AC, Fig. 2 is refer to, the present embodiment also includes an AC sampling unit
70, the AC sampling unit 70 is connected between the input of input rectifying filter unit 10 and MCU control unit 80, described
AC sampling unit 70 is used to gather the voltage of the AC of input rectifying filter unit 10 and feeds back to MCU control unit 80.
Further, the AC sampling unit 70 includes amplifier U9B, the amplifier U9B two inputs difference
The input of input rectifying filter unit 10 is connected to by current-limiting resistance, the output end of the amplifier U9B is connected to MCU controls
Unit 80 processed.
For the ease of being gathered in real time to electric current, is connected between the source electrode and front end ground of the 3rd switching tube Q5
One sampling resistor R2A, the source electrode of the 3rd switching tube Q5 is connected to MCU control unit 80, by first sampling resistor
R2A and make MCU control unit 80 gather the 3rd switching tube Q5 source electrodes electric signal.
As a kind of preferred embodiment, in order to be acquired to DC side electric signal, the present embodiment also includes a D/C voltage
Sampling unit 50, the D/C voltage sampling unit 50 includes the second sampling resistor R13 and the 3rd sampling resistor being sequentially connected in series
R15, the second sampling resistor R13 front end are connected to the output end of interleaving inverse excitation isolated variable unit 30, and the described 3rd adopts
Sample resistance R15 rear end is connected to MCU control unit 80, by the second sampling resistor R13 and the 3rd sampling resistor R15
MCU control unit 80 is made to gather the electric signal of the output of interleaving inverse excitation isolated variable unit 30.
Intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations disclosed in the utility model, it has
High PF values, can be achieved power network and isolate with output end, and security is very high.It is able to can be automatically adjusted in input full voltage range
Output voltage, can fix output frequency, and output voltage is, with sinewave output, automatic shaping function to be pressed with to alternating current,
In addition, the utility model circuit is simple, it is easy to control, and containing voltage and current sampling circuit, can anti-surge voltage and electricity
Stream.
Simply the utility model preferred embodiment described above, is not limited to the utility model, all in this practicality
Modification, equivalent substitution or improvement made in new technical scope etc., should be included in the model that the utility model is protected
In enclosing.
Claims (10)
1. a kind of intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations, it is characterised in that including is used for
Rectification and the input rectifying filter unit filtered are carried out to line voltage, is entered for the output voltage to input rectifying filter unit
The PFC boost unit of row boost conversion, and：
One interleaving inverse excitation isolated variable unit, include first switch pipe, second switch pipe, the first transformer, the second transformer,
First diode, the second diode, the 3rd diode and the 4th diode, the first end of the first primary winding connect
The output end of PFC boost unit is connected to, the second end of the first primary winding is connected to the drain electrode of first switch pipe,
With being connected to front end, the drain electrode of the first switch pipe is connected to the anode of the first diode to the source electrode of the first switch pipe,
The negative electrode of first diode is connected to the output end of PFC boost unit by first resistor, and the first resistor is parallel with
3rd electric capacity, the first end of the second primary winding is connected to the output end of PFC boost unit, second transformation
Second end of device armature winding is connected to the drain electrode of second switch pipe, the source electrode of the second switch pipe with being connected to front end, institute
The drain electrode for stating second switch pipe is connected to the anode of the second diode, and the negative electrode of second diode is connected by second resistance
In the output end of PFC boost unit, the second resistance is parallel with the 4th electric capacity, and the grid of the first switch pipe and second open
The grid for closing pipe is respectively used to access the pwm pulse signal of two-way opposite in phase, the first of the first transformer secondary output winding
End is connected to the anode of the 3rd diode, the second end of the first transformer secondary output winding with being connected to rear end, described second
With being connected to rear end, the second end of the second transformer secondary output winding is connected to the four or two to the first end of transformer secondary output winding
The negative electrode of pole pipe, the negative electrode of the 3rd diode and the anode of the 4th diode are used as the defeated of interleaving inverse excitation isolated variable unit
Go out end；
One DC filter units, include the first electric capacity and the second electric capacity, and the negative electrode of the 3rd diode is connected by the first electric capacity
With being connected to rear end, the anode of the 4th diode by the second capacitance connection in rear end；
One inversion reversed phase unit, includes the 4th switching tube, the 5th switching tube, the 3rd electrochemical capacitor, the 4th electrochemical capacitor and filter
Ripple inductance, the drain electrode of the 4th switching tube is connected to the output head anode of interleaving inverse excitation isolated variable unit, and the described 4th opens
The source electrode for closing pipe is connected to the drain electrode of the 5th switching tube, and the source electrode of the 5th switching tube is connected to interleaving inverse excitation isolated variable list
The negative pole of output end of member, the grid of the 4th switching tube and the grid of the 5th switching tube are respectively used to access two-way opposite in phase
Pwm pulse signal, the source electrode of the 4th switching tube is also attached to the front end of filter inductance, and the 3rd electrochemical capacitor is just
Pole is connected to the drain electrode of the 4th switching tube, the negative pole connection rear end of the 3rd electrochemical capacitor, the 3rd electrochemical capacitor
Negative pole is also attached to the positive pole of the 4th electrochemical capacitor, and the negative pole of the 4th electrochemical capacitor is connected to the source electrode of the 5th switching tube,
The negative pole of the rear end of the filter inductance and the 3rd electrochemical capacitor as inversion reversed phase unit output end.
2. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 1 based on PFC interleaving inverse excitations, its feature exists
In, be connected with first resistor between the grid and source electrode of the 4th switching tube, the grid and source electrode of the 5th switching tube it
Between be connected with second resistance.
3. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 1 based on PFC interleaving inverse excitations, its feature exists
In the input rectifying filter unit includes socket, insurance, lightning protection resistance, common mode inhibition inductance, safety electric capacity and rectification
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, the lightning protection
Resistor coupled in parallel is parallel to common mode inhibition inductance in the front end of common mode inhibition inductance, the input of the safety electric capacity and rectifier bridge
Rear end, the output end of the rectifier bridge is parallel with filter capacitor.
4. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 1 based on PFC interleaving inverse excitations, its feature exists
In the PFC boost unit includes boost inductance, the 3rd switching tube, the first commutation diode and the second electrochemical capacitor, described
The front end of boost inductance is connected to the output end of input rectifying filter unit, and the rear end of the boost inductance is connected to the 3rd switch
The drain electrode of pipe, with connecing front end, the grid of the 3rd switching tube is used to access PWM all the way and controlled the source electrode of the 3rd switching tube
Signal, the anode of drain electrode the first commutation diode of connection of the 3rd switching tube, the negative electrode of first commutation diode is made
The positive pole of the second electrochemical capacitor, the second electrolysis are connected for the negative electrode of the output end of PFC boost unit, and first commutation diode
The negative pole of electric capacity is with connecing front end.
5. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 4 based on PFC interleaving inverse excitations, its feature exists
In also including a MCU control unit, the grid of the first switch pipe, the grid of second switch pipe and the 3rd switching tube
Grid is connected to MCU control unit, and the MCU control unit is used to distinguish output pwm signal to first switch pipe, second
Switching tube and the 3rd switching tube, to control first switch pipe, second switch pipe and the 3rd switching tube on off operating mode.
6. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 5 based on PFC interleaving inverse excitations, its feature exists
In the MCU control unit includes single-chip microcomputer and its peripheral circuit.
7. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 5 based on PFC interleaving inverse excitations, its feature exists
In also including an AC sampling unit, the AC sampling unit is connected to the input and MCU of input rectifying filter unit
Between control unit, the AC sampling unit is used to gather the voltage of input rectifying filter unit AC and feeds back to MCU
Control unit.
8. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 7 based on PFC interleaving inverse excitations, its feature exists
Include amplifier in, the AC sampling unit, two inputs of the amplifier are connected to defeated by current-limiting resistance respectively
Enter the input of rectification filtering unit, the output end of the amplifier is connected to MCU control unit.
9. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 5 based on PFC interleaving inverse excitations, its feature exists
In being connected with the first sampling resistor between the source electrode and front end ground of the 3rd switching tube, the source electrode of the 3rd switching tube connects
MCU control unit is connected to, makes MCU control unit gather the telecommunications of the 3rd switching tube source electrode by first sampling resistor
Number.
10. the intelligent half-bridge sine voltage change-over circuit as claimed in claim 5 based on PFC interleaving inverse excitations, its feature
It is, also include a D/C voltage sampling unit, the D/C voltage sampling unit includes the second sampling resistor being sequentially connected in series
With the 3rd sampling resistor, the front end of second sampling resistor is connected to the output end of interleaving inverse excitation isolated variable unit, described
The rear end of 3rd sampling resistor is connected to MCU control unit, and MCU is made by second sampling resistor and the 3rd sampling resistor
The electric signal of control unit collection interleaving inverse excitation isolated variable unit output.
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| CN201720036776.8U CN206422704U (en) | 2017-01-11 | 2017-01-11 | Intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856378A (en) * | 2017-01-11 | 2017-06-16 | 广东百事泰电子商务股份有限公司 | Intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations |
| TWI664790B (en) * | 2017-12-22 | 2019-07-01 | 財團法人工業技術研究院 | Distributed single stage on board charging device and method thereof |
| CN111817548A (en) * | 2020-07-28 | 2020-10-23 | 广东汇芯半导体有限公司 | Intelligent power module |
| US10944283B2 (en) | 2017-12-22 | 2021-03-09 | Industrial Technology Research Institute | Distributed single-stage on-board charging device and method thereof |
| CN115133789A (en) * | 2022-07-11 | 2022-09-30 | 湖南众源科技有限公司 | Bipolar voltage pulse power supply topological structure and control method |
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2017
- 2017-01-11 CN CN201720036776.8U patent/CN206422704U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856378A (en) * | 2017-01-11 | 2017-06-16 | 广东百事泰电子商务股份有限公司 | Intelligent half-bridge sine voltage change-over circuit based on PFC interleaving inverse excitations |
| WO2018129825A1 (en) * | 2017-01-11 | 2018-07-19 | 广东百事泰电子商务股份有限公司 | Smart half-bridge sine-wave voltage conversion circuit based on pfc interleaved flyback |
| TWI664790B (en) * | 2017-12-22 | 2019-07-01 | 財團法人工業技術研究院 | Distributed single stage on board charging device and method thereof |
| US10944283B2 (en) | 2017-12-22 | 2021-03-09 | Industrial Technology Research Institute | Distributed single-stage on-board charging device and method thereof |
| CN111817548A (en) * | 2020-07-28 | 2020-10-23 | 广东汇芯半导体有限公司 | Intelligent power module |
| CN111817548B (en) * | 2020-07-28 | 2024-03-22 | 广东汇芯半导体有限公司 | Intelligent power module |
| CN115133789A (en) * | 2022-07-11 | 2022-09-30 | 湖南众源科技有限公司 | Bipolar voltage pulse power supply topological structure and control method |
| CN115133789B (en) * | 2022-07-11 | 2023-09-01 | 湖南众源科技有限公司 | Bipolar voltage pulse power supply topological structure and control method |
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