CN107171564A - A kind of Active Clamped Forward Converters - Google Patents
A kind of Active Clamped Forward Converters Download PDFInfo
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- CN107171564A CN107171564A CN201710529623.1A CN201710529623A CN107171564A CN 107171564 A CN107171564 A CN 107171564A CN 201710529623 A CN201710529623 A CN 201710529623A CN 107171564 A CN107171564 A CN 107171564A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of Active Clamped Forward Converters, belong to DC/DC switch power technologies field, it includes the first Active Clamped Forward Converters unit and the second Active Clamped Forward Converters unit and DC source, DC source is connected to the first active forward converter unit and the second active forward converter unit, the input series connection of first active forward converter unit and the second active forward converter unit, and first active forward converter unit and the second active forward converter unit output end series connection, first Active Clamped Forward Converters unit and the second Active Clamped Forward Converters unit interlock work.The present invention can effectively reduce secondary rectifying tube voltage x current stress, reduce output voltage pulsation of current, reduce output filter volume；Equivalent dutycycle is more than 0.5, it is adaptable to which Width funtion inputs occasion；Most of degaussing voltage is provided by input capacitance, and only fraction degaussing voltage is provided by clamp capacitor, can effectively reduce that clamp capacitor is pressure-resistant and capacitance.
Description
Technical field
The invention belongs to DC/DC switch power technologies field, more particularly to a kind of Active Clamped Forward Converters.
Background technology
Forward converter is because its is simple in construction, high reliability is widely applied.But it needs additionally
Magnetic reset circuit realize transformer degaussing, conventional method has：Using auxiliary transformer winding, RCD circuits, LCDD resonance
Circuit, active clamp circuit and resonant magnetic reset normal shock, double tube positive exciting etc..Wherein, the switching tube electricity of two-transistor forward converter
Compression is minimum, can reclaim whole magnetization energies, therefore be widely used in high pressure and high efficiency occasion.But double tube positive exciting
Dutycycle 0.5 work is necessarily less than to ensure the magnetic reset of transformer, limit its wide-voltage range input occasion should
With.Although Active Clamped Forward Converters switching tube dutycycle can be more than 0.5, the voltage stress of switching tube can then reach defeated
Enter more than twice of voltage, therefore be not suitable for high pressure applications and transformer excitation voltage is provided by clamp capacitor completely,
And whole magnetic energy must first pass through clamp capacitor absorption, then be fed back to power input indirectly again.
The content of the invention
It is an object of the invention to provide a kind of Active Clamped Forward Converters, there is efficiency high, small volume, be used for
Solve the above problems.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of Active Clamped Forward Converters, it includes
One Active Clamped Forward Converters unit and the second Active Clamped Forward Converters unit and DC source, DC source are connected to
First active forward converter unit and the second active forward converter unit, the first active forward converter unit and second have
The input series connection of source forward converter unit, and the first active forward converter unit and the second active forward converter list
The output end series connection of member, the first Active Clamped Forward Converters unit and the second Active Clamped Forward Converters unit interlock work
Make.
Further, the first active forward converter unit and the second active forward converter unit include primary side electricity
Road, secondary circuit and transformer, primary circuit include field circuit and degausser, and secondary circuit includes rectification circuit and filter
Wave circuit, wherein, the first active forward converter unit and the first active public filter circuit of forward converter unit.
Further, the primary circuit of the first Active Clamped Forward Converters unit includes the first input capacitance C1, first
Switching tube S1, the 3rd switching tube S3 and the first clamp capacitor Cc1, the positive pole of DC source is connected to the first input capacitance C1Just
Pole, first switch pipe S1Drain electrode, the first input capacitance C1Negative pole be connected to the first transformer T1The different name end of primary side winding, the
One switching tube S1Source electrode be connected to the first transformer T1The Same Name of Ends of primary side winding, DC source UinNegative pole be connected to the 3rd and open
Close pipe S3Source electrode, the 3rd switching tube S3Drain electrode be connected to the first clamp capacitor Cc1Negative pole, the first clamp capacitor Cc1Just
Pole is connected to the first transformer T1The Same Name of Ends of primary side winding；
The primary circuit of second Active Clamped Forward Converters unit includes the second input capacitance C2, second switch pipe S2,
Four switching tube S4And the second clamp capacitor Cc2, the negative pole of DC source is connected to the second input capacitance C1Negative pole, second switch
Pipe S2Source electrode, the second clamp capacitor C2Positive pole be connected to the second transformer T2The Same Name of Ends of primary side winding, second switch pipe S2's
Drain electrode is connected to the second transformer T2The different name end of primary side winding, the positive pole of DC source is connected to the second clamp capacitor Cc2Just
Pole, the second clamp capacitor Cc2Negative pole be connected to the 4th switching tube S4Drain electrode, the 4th switching tube S4Source electrode be connected to second
Transformer T2The different name end of primary side winding.
Further, the rectification circuit of the secondary of the first Active Clamped Forward Converters unit includes the first diode D1、
Second diode D2, the first transformer T1Vice-side winding Same Name of Ends connect the first diode D1Anode, the first transformer T1's
Vice-side winding different name end connects the second diode D2Anode, the first diode D1Negative electrode and the second diode D2Negative electrode phase
Connect；
The rectification circuit of the secondary of second Active Clamped Forward Converters unit includes the 3rd diode D3, the 4th diode
D4, the second transformer T2Vice-side winding Same Name of Ends connect the 4th diode D1Negative electrode, the second transformer T2Vice-side winding it is different
Name end connects the 3rd diode D3Negative electrode, the 3rd diode D2Anode and the 4th diode D4Anode connect；
Wherein, the first Active Clamped Forward Converters unit and the second Active Clamped Forward Converters unit secondary are public
Filter circuit includes output inductor Lo, output filter capacitor CoWith load Ro, output inductor LoPositive pole be connected to
One diode D1Negative electrode, output inductor LoNegative pole respectively at output filter capacitor CoPositive pole and load RoOne end
Connection, output filter capacitor CoNegative pole and load RoThe other end connection after be connected to the 3rd diode D3Anode.
Further, the first input capacitance C of the first Active Clamped Forward Converters unit1With the second active clamp normal shock
Second input capacitance C of power converter cells2Parameter it is identical (parameter include capacitance, pressure-resistant etc.)；
The first switch pipe S of first Active Clamped Forward Converters unit1, the 3rd switching tube S3With the second active clamp just
The second switch pipe S of exciting converter unit2, the 4th switching tube S4Parameter it is identical；
First clamp capacitor C of the first Active Clamped Forward Converters unitc1With the second Active Clamped Forward Converters list
Second clamp capacitor C of memberc2Parameter it is identical；
First diode D of the first Active Clamped Forward Converters unit1, the second diode D2With the second active clamp just
3rd diode D of exciting converter unit3, the 4th diode D4Parameter it is identical；
And first Active Clamped Forward Converters unit transformer T1With the first Active Clamped Forward Converters unit
Transformer T2Parameter it is identical.
The present invention can effectively reduce secondary rectifying tube voltage x current stress using the series connection of two-way forward converter outlet side,
Reduce output voltage pulsation of current, reduce output filter volume；Equivalent dutycycle is more than 0.5, it is adaptable to Width funtion input field
Close；Most of degaussing voltage is provided by input capacitance, and only fraction degaussing voltage is provided by clamp capacitor, can effectively reduce pincers
Position electric capacity is pressure-resistant and capacitance.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
Fig. 1 is the Active Clamped Forward Converters structure chart of one embodiment of the invention.
Key waveforms figure when Fig. 2 is the dutycycle D ＜ 0.5 of one embodiment of the invention.
Fig. 3 is the Active Clamped Forward Converters structure chart of the mode 1 based on Fig. 2.
Fig. 4 is the Active Clamped Forward Converters structure chart of the mode 2 based on Fig. 2.
Fig. 5 is the Active Clamped Forward Converters structure chart of the mode 3 based on Fig. 2.
Fig. 6 is the Active Clamped Forward Converters structure chart of the mode 4 based on Fig. 2.
Fig. 7 is the Active Clamped Forward Converters structure chart of the mode 5 based on Fig. 2.
Fig. 8 is the Active Clamped Forward Converters structure chart of the mode 6 based on Fig. 2.
Fig. 9 is the Active Clamped Forward Converters structure chart of the mode 7 based on Fig. 2.
Figure 10 is the Active Clamped Forward Converters structure chart of the mode 8 based on Fig. 2.
Key waveforms figure when Figure 11 is the dutycycle D ＜ 0.5 of one embodiment of the invention.
Figure 12 is the Active Clamped Forward Converters structure chart of the mode 1 based on Figure 11.
Figure 13 is the Active Clamped Forward Converters structure chart of the mode 2 based on Figure 11.
Figure 14 is the Active Clamped Forward Converters structure chart of the mode 3 based on Figure 11.
Figure 15 is the Active Clamped Forward Converters structure chart of the mode 4 based on Figure 11.
Figure 16 is the Active Clamped Forward Converters structure chart of the mode 5 based on Figure 11.
Figure 17 is the Active Clamped Forward Converters structure chart of the mode 6 based on Figure 11.
Figure 18 is the Active Clamped Forward Converters structure chart of the mode 7 based on Figure 11.
Figure 19 is the Active Clamped Forward Converters structure chart of the mode 8 based on Figure 11.
Embodiment
To make the purpose, technical scheme and advantage of the invention implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.
Referring to Fig. 1, Active Clamped Forward Converters of the invention by two-way Active Clamped Forward Converters unit input
End series connection, output end series connection, and constituted using active clamp magnetic reset circuit.Active Clamped Forward Converters unit is by inputting
DC source UinInput, Active Clamped Forward Converters include the first input capacitance C1, the second input capacitance C2, first switch pipe S1、
Second switch pipe S2, the 3rd switching tube S3, the 4th switching tube S4, the first clamp capacitor Cc1, the second clamp capacitor Cc2, the first transformation
Device T1, the second transformer T2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, output filtering
Inductance Lo, output filter capacitor CoWith load RoDeng wherein the first active clamp transformer includes transformer T1, the first primary side around
Group NP1With the first vice-side winding NS1, the second active clamp transformer include transformer T2, the second primary side winding NP2With the second secondary
Winding NS2；
Wherein, input direct-current source UinPositive pole be respectively connected to the first input capacitance C1Anode, first switch pipe S1Drain electrode and
Second clamp capacitor Cc2Negative terminal, input direct-current source UinNegative pole be respectively connected to the second input capacitance C2Negative terminal, the 3rd switching tube S3
Source electrode and second switch pipe S2Source electrode, first switch pipe S1Source electrode is respectively connected to the first clamp capacitor Cc1Negative terminal and the first primary side around
Group NP1Same Name of Ends, the first clamp capacitor Cc1Anode and the 3rd switching tube S3Drain electrode is connected, the second clamp capacitor Cc2Anode is connected in
4th switching tube S4Drain electrode, the 4th switching tube S4Source electrode is respectively connected to the second primary side winding NP2Non-same polarity and second switch pipe
S2Drain electrode, the first primary side winding NP1Non-same polarity be respectively connected to the second primary side winding NP2Same Name of Ends, the first input capacitance C1
Negative terminal and the second input capacitance C2Anode, the first vice-side winding NS1Same Name of Ends is connected in the first diode D1Anode, the first diode D1
Negative electrode is respectively connected to the second diode D2Negative electrode and output inductor LoAnode, output inductor LoNegative terminal connect respectively
In output filter capacitor CoAnode and load RoAnode, the first vice-side winding NS1Non-same polarity is respectively connected to two diode D2
Anode, the 4th diode D4Negative electrode and the second vice-side winding NS2Same Name of Ends, the second vice-side winding NS2Non-same polarity is connected in the three or two
Pole pipe D3Negative electrode, the 3rd diode D3Anode is respectively connected to the 4th diode D4Anode, output filter capacitor CoNegative terminal and load
RoNegative terminal.
2~accompanying drawing 19 illustrates the concrete operating principle and the course of work of the present invention below in conjunction with the accompanying drawings.First, before analysis
Do hypothesis below：(1) all switching tubes, diode are ideal component；(2) input capacitance C1、C2It is sufficiently large and equal, voltage
Perseverance is Uin/2；(3) switching tube S1、S2Dutycycle is equal in magnitude and staggeredly turns on, and dutycycle is D.
(1) during D ＜ 0.5, key waveforms as shown in Figure 2, share 8 main switch mode in half of switch periods
[the t of mode 10~t1] [accompanying drawing 3]：t0Moment, first switch pipe S1It is open-minded, second switch pipe S2It is off state,
3rd switching tube S3It is off state, the 4th switching tube S4Conducting, the first diode D1With the second diode D2Start the change of current,
First diode D1Electric current linearly increase, the second diode D2Electric current linearly reduce, the 3rd diode D3Turn off the four or two pole
Pipe D4Conducting；Now transformer T1Original edge voltage up1It is clamped at 0.
[the t of mode 21~t2] [accompanying drawing 4]：t1Moment, the first diode D1With the second diode D2The change of current terminates, the two or two pole
Pipe D2Middle electric current is decreased to 0, the first diode of secondary D1, the 4th diode D4Conducting, the second diode D2, the 3rd diode D3Close
It is disconnected, output inductor LOElectric current linearly increases；Input source passes through transformer T1To secondary transmission energy, transformer T1Excitation electricity
Stream starts increase, transformer T2Pass through the switching tube S of clamper branch road the 3rd3, the first clamp capacitor CC1With the first input capacitance C1Carry out
Magnetic reset.
[the t of mode 32~t3] [accompanying drawing 5]：t2Moment, first switch pipe S1Shut-off, the load current for being folded to primary side starts
Give first switch pipe S1Junction capacity Coss1Charging, it is assumed that this time is very short, and load current is constant, first switch pipe S1Leakage
Source voltage uDS1Linear rise, the 3rd switching tube S3Drain-source voltage uDS3With transformer T1Original edge voltage up1Start linear
Reduce, until t3Moment, uDS1Rise to Uin/ 2, up1For 0.
[the t of mode 43~t4] [accompanying drawing 6]：t3Moment, up1For 0, now the second diode D2With the first diode D1Start to change
Stream, the second diode D2Middle electric current linearly increases, the first diode D1Middle electric current linearly reduces, the 4th diode D4Conducting, transformation
Device T1Exciting current is begun to decline, uDS1Continue to increase, until t4Moment, the first diode D1With the second diode D2Change of current knot
Beam.
[the t of mode 54~t5] [accompanying drawing 7]：t4Moment, the first diode D1With the second diode D2The change of current terminates, uDS1Continue
Rise, transformer T1Start magnetic reset, at the end of the stage, uDS3=0, uDS1=Uin-Uc(Uc is clamp capacitor Cc1、Cc2Electricity
Pressure).
[the t of mode 65~t6] [accompanying drawing 8]：t5Moment, uDS3=0, the 3rd switching tube S3Fly-wheel diode conducting, first opens
Close pipe S1Both end voltage is clamped at Uin-Uc, transformer T1Resetting voltage Up1=-(Uin/2-Uc), transformer T1Exciting current
It is linear to reduce.
[the t of mode 76~t7] [accompanying drawing 9]：t6Moment, switching tube S3Drive signal uprise, S3No-voltage is open-minded, T1Excitation
Electric current continues linear reduce.
[the t of mode 87~t8] [accompanying drawing 10]：t7Moment, the 4th switching tube S4Turn off, now transformer T2Magnetizing inductance open
Begin and Coss4(switching tube S4 junction capacity) resonance, transformer T1Exciting current resonance reversely reduces, the 4th switching tube S4Hourglass source electrode
Voltage uDS4Resonance increases, correspondence uDS2Reduce, until t8Moment, second switch pipe S2It is open-minded.
The mode of operation of lower half period is symmetrical with the upper half cycle, not in repeated description.
(2) during D >=0.5, key waveforms as shown in Figure 11, share 8 main switching moldings in half of switch periods
State.
[the t of mode 10~t1] [accompanying drawing 12]：t0Moment, first switch pipe S1It is open-minded, second switch pipe S2In opening state,
3rd switching tube S3With the 4th switching tube S4It is in off state, the first diode D1With the second diode D2Start the change of current, the
One diode D1Electric current linearly increase, the second diode D2Electric current linearly reduce；Now transformer T1Original edge voltage Up1Clamped
Position is 0.
[the t of mode 21~t2] [accompanying drawing 13]：t1Moment, the first diode D1With the second diode D2The change of current terminates, and the two or two
Pole pipe D2Middle electric current is decreased to 0, the first diode of secondary D1, the 3rd diode D3Conducting, the second diode D2, the 4th diode D4
Shut-off, inductive current linearly increases；Input source passes through transformer T1With transformer T2To secondary transmission energy, transformer T1, transformation
Device T2Exciting current linearly increase.
[the t of mode 32~t3] [accompanying drawing 14]：t2Moment, second switch pipe S2Shut-off, first switch pipe S1Still in conducting shape
State, input source passes through transformer T1To secondary transmission energy, the load current for being folded to primary side starts to give second switch pipe S2Knot
Electric capacity Coss2Charging, it is assumed that this time is very short, and load current is constant, uDS2Linear rise, uDS4With transformer T2Original edge voltage
up2Start linear reduction, until t2Moment, uDS2Rise to Uin/ 2, up2For 0, now uDS2=Uin/ 2, uDS4=Uin/2+Uc。
[the t of mode 43~t4] [accompanying drawing 15]：t3Moment, up20 is clamped at, now the 3rd diode D3With the 4th diode
D4Start the change of current, the 3rd diode D3Electric current linearly reduces, the 4th diode D4Electric current linearly increases, until t4Moment change of current knot
Beam.
[the t of mode 54~t5] [accompanying drawing 16]：t4Moment, the 3rd diode D3With the 4th diode D4The change of current terminates, uDS2Continue
Increase, up2Start to be less than 0, uDS4Continue to reduce, transformer T2Start magnetic reset, this mode to t5Moment, uDS4=0, uDS2=Uin
+UcTerminate.
[the t of mode 65~t6] [accompanying drawing 17]：t5Moment, uDS4=0, the 4th switching tube S4Fly-wheel diode conducting, second
Switching tube S2Both end voltage is clamped at Uin+Uc, transformer T2Resetting voltage Up2=-(Uin/2+Uc), its exciting current is linear
Reduce.
[the t of mode 76~t7] [accompanying drawing 18]：t6Moment, the 4th switching tube S4Drive signal uprise, the 4th switching tube S4Zero
Voltage is open-minded, transformer T2Exciting current continues linear reduce.
[the t of mode 87~t8] [accompanying drawing 19]：t7Moment, the 4th switching tube S4Shut-off, now transformer T2Magnetizing inductance
Start and the 4th switching tube S4Junction capacity Coss4Resonance, transformer T2Exciting current resonance reversely reduces, uDS4Resonance increases, until
t8Moment, second switch pipe S2It is open-minded.
The mode of operation of lower half period is same with preceding half of cycle phase, and narration is not repeated.
It can be seen from converter operation principle, using the topology of the present invention, per road normal shock unit magnetic reset voltage by inputting
Both electric capacity and clamp capacitor voltage are provided, therefore clamp capacitor capacitance and pressure-resistant comparable traditional clamper normal shock reduce, and are become
Depressor major part magnetization energy can direct feedback input source, only sub-fraction can reduce circuit by clamp circuit feedback
Loss.
The present invention can effectively reduce secondary rectifying tube voltage x current stress using the series connection of two-way forward converter outlet side,
Reduce output voltage pulsation of current, reduce output filter volume；Equivalent dutycycle is more than 0.5, it is adaptable to Width funtion input field
Close；Most of degaussing voltage is provided by input capacitance, and only fraction degaussing voltage is provided by clamp capacitor, can effectively reduce pincers
Position electric capacity is pressure-resistant and capacitance.
It is described above, it is only the optimal embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Enclose and be defined.
Claims (5)
1. a kind of Active Clamped Forward Converters, it is characterised in that including the first Active Clamped Forward Converters unit and second
Active Clamped Forward Converters unit and DC source, DC source, which is connected to the first active forward converter unit and second, to be had
The input series connection of source forward converter unit, the first active forward converter unit and the second active forward converter unit,
And first active forward converter unit and the second active forward converter unit output end series connection, the first active clamp is just
Exciting converter unit and the second Active Clamped Forward Converters unit interlock work.
2. Active Clamped Forward Converters according to claim 1, it is characterised in that the first active forward converter unit
Include primary circuit, secondary circuit and transformer with the second active forward converter unit, primary circuit includes field circuit
And degausser, and secondary circuit include rectification circuit and filter circuit, wherein, the first active forward converter unit and first
The active public filter circuit of forward converter unit.
3. Active Clamped Forward Converters according to claim 2, it is characterised in that the first Active Clamped Forward Converters
The primary circuit of unit includes the first input capacitance C1, first switch pipe S1, the 3rd switching tube S3 and the first clamp capacitor Cc1, directly
The positive pole in stream source is connected to the first input capacitance C1Positive pole, first switch pipe S1Drain electrode, the first input capacitance C1Negative pole connect
It is connected to the first transformer T1The different name end of primary side winding, first switch pipe S1Source electrode be connected to the first transformer T1Primary side winding
Same Name of Ends, DC source UinNegative pole be connected to the 3rd switching tube S3Source electrode, the 3rd switching tube S3Drain electrode be connected to first
Clamp capacitor Cc1Negative pole, the first clamp capacitor Cc1Positive pole be connected to the first transformer T1The Same Name of Ends of primary side winding；
The primary circuit of second Active Clamped Forward Converters unit includes the second input capacitance C2, second switch pipe S2, the 4th open
Close pipe S4And the second clamp capacitor Cc2, the negative pole of DC source is connected to the second input capacitance C1Negative pole, second switch pipe S2Source
Pole, the second clamp capacitor C2Positive pole be connected to the second transformer T2The Same Name of Ends of primary side winding, second switch pipe S2Drain electrode connect
It is connected to the second transformer T2The different name end of primary side winding, the positive pole of DC source is connected to the second clamp capacitor Cc2Positive pole, second
Clamp capacitor Cc2Negative pole be connected to the 4th switching tube S4Drain electrode, the 4th switching tube S4Source electrode be connected to the second transformer T2
The different name end of primary side winding.
4. Active Clamped Forward Converters according to claim 2, it is characterised in that the first Active Clamped Forward Converters
The rectification circuit of the secondary of unit includes the first diode D1, the second diode D2, the first transformer T1Vice-side winding Same Name of Ends
Connect the first diode D1Anode, the first transformer T1Vice-side winding different name end connect the second diode D2Anode, first
Diode D1Negative electrode and the second diode D2Negative electrode connect；
The rectification circuit of the secondary of second Active Clamped Forward Converters unit includes the 3rd diode D3, the 4th diode D4, the
Two transformer T2Vice-side winding Same Name of Ends connect the 4th diode D1Negative electrode, the second transformer T2Vice-side winding different name end
Connect the 3rd diode D3Negative electrode, the 3rd diode D2Anode and the 4th diode D4Anode connect；
Wherein, the first Active Clamped Forward Converters unit and the public filtering of the second Active Clamped Forward Converters unit secondary
Circuit includes output inductor Lo, output filter capacitor CoWith load Ro, output inductor LoPositive pole be connected to the one or two
Pole pipe D1Negative electrode, output inductor LoNegative pole respectively at output filter capacitor CoPositive pole and load RoOne end connection,
Output filter capacitor CoNegative pole and load RoThe other end connection after be connected to the 3rd diode D3Anode.
5. Active Clamped Forward Converters according to claim 2, it is characterised in that the first Active Clamped Forward Converters
First input capacitance C of unit1With the second input capacitance C of the second Active Clamped Forward Converters unit2Parameter it is identical；
The first switch pipe S of first Active Clamped Forward Converters unit1, the 3rd switching tube S3With the positive violent change of the second active clamp
The second switch pipe S of exchange unit2, the 4th switching tube S4Parameter it is identical；
First clamp capacitor C of the first Active Clamped Forward Converters unitc1With the second Active Clamped Forward Converters unit
Second clamp capacitor Cc2Parameter it is identical；
First diode D of the first Active Clamped Forward Converters unit1, the second diode D2With the positive violent change of the second active clamp
3rd diode D of exchange unit3, the 4th diode D4Parameter it is identical；
And first Active Clamped Forward Converters unit transformer T1With the transformation of the first Active Clamped Forward Converters unit
Device T2Parameter it is identical.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612340A (en) * | 2017-09-18 | 2018-01-19 | 电子科技大学 | A kind of low voltage stress isolating full-bridge converter circuit arrangement |
| CN113242015A (en) * | 2021-03-03 | 2021-08-10 | 青岛大学 | Differential power optimized DMPPT photovoltaic cell module based on multi-winding flyback DC converter |
| CN114244078A (en) * | 2021-11-30 | 2022-03-25 | 广州金升阳科技有限公司 | Drive control method, edge modulation circuit and drive control circuit |
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| CN113242015A (en) * | 2021-03-03 | 2021-08-10 | 青岛大学 | Differential power optimized DMPPT photovoltaic cell module based on multi-winding flyback DC converter |
| CN114244078A (en) * | 2021-11-30 | 2022-03-25 | 广州金升阳科技有限公司 | Drive control method, edge modulation circuit and drive control circuit |
| CN114244078B (en) * | 2021-11-30 | 2024-02-13 | 广州金升阳科技有限公司 | Driving control method, edge modulation circuit and driving control circuit |
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