CN107017776A - New isolation type active clamping alternation parallel Boost soft switch transducers and method of work - Google Patents
New isolation type active clamping alternation parallel Boost soft switch transducers and method of work Download PDFInfo
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- CN107017776A CN107017776A CN201710276323.7A CN201710276323A CN107017776A CN 107017776 A CN107017776 A CN 107017776A CN 201710276323 A CN201710276323 A CN 201710276323A CN 107017776 A CN107017776 A CN 107017776A
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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
- 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
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
-
- 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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Abstract
The invention discloses a kind of new isolation type active clamping alternation parallel Boost soft switch transducers and method of work, first inductance, the second inductance, the 3rd inductance are one group of coupling inductance, 4th inductance, the 5th inductance, the 6th inductance are another group of coupling inductance, and the second inductance, the 3rd inductance, the number of turn of the 5th inductance and the 6th inductance are n2；The number of turn of first inductance and the 4th inductance is n1.7th inductance and the magnetizing inductance that the 8th inductance is coupling inductance；9th inductance and the equivalent leakage inductance that the tenth inductance is coupling inductance；First metal-oxide-semiconductor and the second metal-oxide-semiconductor are main switch；First diode and the second diode are output diode；First electric capacity and the second electric capacity are the shunt capacitance on the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；3rd electric capacity is clamping capacitance；Coupling inductance turn ratio is defined as N=n2∶n1。
Description
Technical field
The present invention relates to electronic circuit automation control area, more particularly to a kind of new isolation type active clamping alternation
Boost soft switch transducers in parallel and method of work.
Background technology
With the environmental problem that global energy is in short supply and serious, new forms of energy resource such as photovoltaic, fuel cell, wind energy, underground heat
Energy is waited and widely paid close attention in the whole world.However, the output voltage of most of new forms of energy resource such as photovoltaic, fuel cell is relatively low,
A kind of converter of high-gain is needed in actual applications.In theory, Boost, Buck-Boost and flyback converter are in pole
Higher voltage gain can be provided during the dutycycle of end.In fact, the voltage gain of these converters is but limited to switching tube, two
The equivalent series resistance of pole pipe, inductance and electric capacity, the influence of leakage inductance.Moreover, can not only be introduced in extreme dutycycle very big
Current ripples and increase conduction loss, can also introduce very serious diode reverse recovery problem.
Therefore, be to improve converter conversion efficiency and avoid the extreme dutycycle situation of work, many quadratic transformation devices and
The 2 stage converter of tandem structure is suggested.Then, because the converter topology of two-layer configuration is complicated, efficiency is reduced.Moreover,
The stability of converter is a problem and the reverse-recovery problems than more serious output diode.As a result, final efficiency ratio
Relatively low, corresponding electromagnetic interference (EMI) noise is than more serious.Isolated converter can be easy in the case where there is transformer
The higher voltage gain of acquisition.However, the leakage inductance of transformer not only results in voltage and current spike, higher switch is introduced
Tube voltage stress, but also loss and noise can be increased, as a result cause less efficient.RCD clamp circuits and active clamping circuir
Voltage stress and switching loss can be reduced, but with the complicated and related clamp circuit loss of converter topology for cost
's.
In order to obtain higher conversion efficiency, the substantial amounts of non-isolated converter based on coupling inductance is due to its circuit structure
Simple and conduction loss is small and is widely studied.However, they but need buffer to cause come the leakage inductance limited by coupling inductance
Switch tube voltage spike.Therefore, voltage clamping circuit, active clamping circuir, passive regeneration buffer circuit has been suggested solution
Certainly this problem.However, all these methods are all by increasing switching tube and electric capacity, become multiple which results in transformer configuration
It is miscellaneous.Based on the non-isolated high-gain converter of the integrated isolated converters of Boost, such as integrated Boost-flyback converters and collection
It has been suggested in the literature into Boost-SEPIC converters.Coupling inductance is improved as transformer by adjusting winding turns ratio
Voltage gain.In addition, leakage inductance energy is directly recycled in output end, so, the due to voltage spikes of switching tube can be limited.And
And, the cut-off current of output diode can be coupled the leakage inductance limitation of inductance, and the reverse-recovery problems of diode are alleviated, related
Loss also reduce.However, the voltage stress of output diode is but added with the increase of the turn ratio of coupling inductance.Cause
This, the reverse-recovery problems of diode still have.Although avoiding extreme dutycycle, input current ripple is due to the list of circuit
Switch control but becomes very big, and this causes these converters to be all unsuitable for high-power, high current application scenario.Traditional interlocks
Boost in parallel is because its result is simple and less input and output ripple, in answering for high-power and PFC
It is relatively good selection in.However, voltage gain is than relatively low, the voltage stress of switching tube and diode is close to output voltage
In order to solve these problems, switching capacity, transformer or coupling inductance are integrated in traditional crisscross parallel Boost.
Therefore, obtain suitable for powerful high-gain, high efficiency, low voltage stress converter.
Interleaving and Transformer Paralleling Boost the characteristics of its is simple in construction and input and output ripple is small because turning into new energy
The preferable selection of system.However, the voltage gain of traditional crisscross parallel Boost is relatively low.Therefore, forward converter andCode converter is integrated in traditional crisscross parallel Boost and has been suggested.Higher voltage can not only be obtained to increase
Benefit and it can also reduce the voltage stress of switching tube and diode.However, integrated forward converter andCode converter circuit
Considerably complicated and costliness.Therefore, crisscross parallel Boost is because its result is simple and less input and output ripple,
It is relatively good selection in the application of high-power and PFC..
The content of the invention
It is contemplated that at least solving technical problem present in prior art, especially innovatively propose a kind of new
Isolation type active clamping alternation parallel Boost soft switch transducers and method of work.
In order to realize the above-mentioned purpose of the present invention, the invention provides a kind of new isolation type active clamping alternation parallel
Boost soft switch transducers, itself it is critical that including：First metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first inductance, the second inductance, the 3rd
Inductance, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 9th inductance, the tenth inductance, the one or two pole
Pipe, the second diode, load, output capacitance, the first electric capacity, the second electric capacity, the 3rd electric capacity.
First inductance, the second inductance, the 3rd inductance are one group of coupling inductance, and the 4th inductance, the 5th inductance, the 6th inductance are
Another group of coupling inductance, the second inductance, the 3rd inductance, the number of turn of the 5th inductance and the 6th inductance are n2；First inductance and
The number of turn of four inductance is n1.7th inductance and the magnetizing inductance that the 8th inductance is coupling inductance；9th inductance and the tenth inductance are
The equivalent leakage inductance of coupling inductance；First metal-oxide-semiconductor and the second metal-oxide-semiconductor are main switch；First diode and the second diode are defeated
Go out diode；First electric capacity and the second electric capacity are the shunt capacitance on the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；3rd electric capacity is clamp
Electric capacity；Coupling inductance turn ratio is defined as N=n2：n1。
Invention additionally discloses a kind of work of new isolation type active clamping alternation parallel Boost soft switch transducers
Make method, it is characterised in that two metal-oxide-semiconductor work schedules are set, a time cycle of metal-oxide-semiconductor on, off is divided into 16
Operation mode, because the symmetry of circuit structure only analyzes wherein t0、t1、t2、t3、t4、t5、t6、t7、t9It is nine time points, described
Method of work includes：
Operation mode 1, in t0To t1Stage：First metal-oxide-semiconductor, the conducting of the second metal-oxide-semiconductor, the first diode and the second diode
Electric current on reverse blocking state, the 7th inductance and the 8th inductance rises in input voltage effect lower linear, and climbing is
Operation mode 2, in t1To t2Stage：t1Moment, the first metal-oxide-semiconductor shut-off, due to outer on the first metal-oxide-semiconductor and the first electricity
The effect of appearance, realizes that voltage linear rises on zero voltage turn-off, the first metal-oxide-semiconductor, climbing is
Operation mode 3, in t2To t3Stage：t2Electric current on moment, the 7th inductance charges to the 3rd electric capacity, the first metal-oxide-semiconductor
On voltage continue it is linearly increasing, due to the 3rd electric capacity be much larger than the first electric capacity Cc＞ ＞ Cs1, the voltage on the first metal-oxide-semiconductor rises
Rate can be approximated to be
Operation mode 4, in t3To t4Stage：t3Voltage on moment, the 3rd electric capacity is raised to certain value so that first is defeated
Go out diode forward conducting, converter starts to transmit energy to load.Resonance, the 9th inductance occur for the 9th inductance and the 3rd electric capacity
On energy start to the 3rd electric capacity shift.
Operation mode 5, in t4To t5Stage：t4Moment, the 3rd electric capacity is started working, and the work of the 3rd electric capacity does not influence the
The work of one metal-oxide-semiconductor and the second metal-oxide-semiconductor, the equivalent circuit of this mode is similar to the 4th operation mode.Electric current on 3rd electric capacity
Change direction due to the resonance of the 9th inductance and the 3rd electric capacity, directly transmit energy to load.
Operation mode 6, in t5To t6Stage：t5Moment, due to the effect of the first electric capacity in parallel on the first metal-oxide-semiconductor, the 3rd
Electric capacity is stopped, and the 9th inductance and the first electric capacity form new resonance circuit.Energy on first electric capacity is gradually pumped.
Operation mode 7, in t6To t7Stage：t6Moment, the upper voltage of the first metal-oxide-semiconductor switch drops to zero, the first metal-oxide-semiconductor
Anti-paralleled diode is turned on.Electric current on 9th inductance is in voltage Uout/ N effect lower linears decline.First output diode is turned off
The fall off rate of electric current.First metal-oxide-semiconductor realizes that no-voltage is open-minded, while also inhibits the Reverse recovery of output diode.
Operation mode 8, in t7To t8Stage：t7Moment, the electric current of the first metal-oxide-semiconductor drops to zero and starts forward conduction, the
Electric current on one diode declines with electric current rising on the 9th inductance.t8Electric current on moment, the 9th inductance is equal to excitation
Electric current on electric current on inductance, the first diode drops to zero, the shut-off of the first diode.Input voltage is to the 9th inductance and
Seven induction chargings.
The method of work of described new isolation type active clamping alternation parallel Boost soft switch transducers, its feature
It is：
It is assumed that the inductance of magnetizing inductance the 7th of coupling inductance is equal to the 8th inductance Lm1=Lm2, the leakage inductance the 9th of coupling inductance
Inductance is equal to the tenth inductance Llk1=Llk2=0.From quiescent operation analysis above, led in the first metal-oxide-semiconductor and the second metal-oxide-semiconductor
When logical, input voltage effect lower linear rises excitation inductance current again；When a metal-oxide-semiconductor and the second metal-oxide-semiconductor are turned off, corresponding excitation
Inductive current is in voltage (Uout/N-Uin) linear decline under effect.Volt-second equilibrium principle is used to magnetizing inductance, output voltage increases
Beneficial expression formula is
M=Uout/Uin=N/ (1-D)
In formula：N is the turn ratio of coupling inductance；D is the dutycycle of converter.The converter has Boost characteristics, relatively
Suitable for boosting occasion.
The method of work of described new isolation type active clamping alternation parallel Boost soft switch transducers, in addition to
ZVT Sofe Switch performance steps：
Due to aiding in the introducing of active clamping circuir, in whole switch periods, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are zero
Voltage soft-switching is acted, and substantially reduces switching loss.The fall off rate of first diode and the second diode cut-off current is
There is quiescent operation model analysis to understand that coupling inductance leakage inductance inhibits diode reverse recovery, reduces due to anti-
The loss brought to restoring current.
The method of work of described new isolation type active clamping alternation parallel BOOST soft switch transducers, in addition to
The step of voltage stress is set：
It is assumed that clamping capacitance is sufficiently large, the shut-off voltage ripple of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor is ignored, the first MOS
Manage and the voltage stress of the second metal-oxide-semiconductor is
The voltage stress of first metal-oxide-semiconductor and the second metal-oxide-semiconductor is determined by input voltage and dutycycle.
The voltage stress of first diode and the second diode is
Ud=2Uout
The voltage stress of first diode and the second diode is 2 times of output voltage, be suppressed due to Reverse recovery and
The switching loss very little of current stress very little, the first diode and the second diode.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
The converter reduces input and output ripple using Interleaving and Transformer Paralleling.Therefore, the leakage inductance energy of transformer
It can recycle, so as to improve transducer effciency.In addition, increased switching capacity reduce as divider switching tube and
The voltage stress of diode, this enables the diode of more low-voltage-grade and the switching tube with more low on-resistance to be chosen
Select further to reduce switching loss and conduction loss.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the new isolation type active clamping alternation parallel Boost soft switch transducer circuit diagrams of the present invention；
Fig. 2 is the new isolation type active clamping alternation parallel Boost soft switch transducer equivalent circuit diagrams of the present invention；
Fig. 3 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 1 of the present invention
Figure；
Fig. 4 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 2 of the present invention
Figure；
Fig. 5 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 3 of the present invention
Figure；
Fig. 6 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 4 of the present invention
Figure；
Fig. 7 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 5 of the present invention
Figure；
Fig. 8 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 6 of the present invention
Figure；
Fig. 9 is the new equivalent circuit of isolation type active clamping alternation parallel Boost soft switch transducers mode 7 of the present invention
Figure；
Figure 10 is the new equivalent electric of isolation type active clamping alternation parallel Boost soft switch transducers mode 8 of the present invention
Lu Tu；
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than indicate or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the limit of the present invention
System.
In the description of the invention, unless otherwise prescribed with limit, it is necessary to explanation, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection or the connection of two element internals, can
To be to be joined directly together, it can also be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
As shown in figure 1, the invention provides a kind of new isolation type active clamping alternation parallel Boost soft switch conversions
Device, itself it is critical that including：First metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first inductance, the second inductance, the 3rd inductance, the 4th inductance,
It is five inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 9th inductance, the tenth inductance, the first diode, the second diode, negative
Load, output capacitance, the first electric capacity, the second electric capacity, the 3rd electric capacity.
First inductance, the second inductance, the 3rd inductance are one group of coupling inductance, and the 4th inductance, the 5th inductance, the 6th inductance are
Another group of coupling inductance, the second inductance, the 3rd inductance, the number of turn of the 5th inductance and the 6th inductance are n2；First inductance and
The number of turn of four inductance is n1.7th inductance and the magnetizing inductance that the 8th inductance is coupling inductance；9th inductance and the tenth inductance are
The equivalent leakage inductance of coupling inductance；First metal-oxide-semiconductor and the second metal-oxide-semiconductor are main switch；First diode and the second diode are defeated
Go out diode；First electric capacity and the second electric capacity are the shunt capacitance on the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；3rd electric capacity is clamp
Electric capacity；Coupling inductance turn ratio is defined as N=n2：n1。
In the circuit proposed in Fig. 1.Switching tube S3An inflow output end is provided for the electric current in static exciter inductance
Path, therefore reduce switching tube S2Current stress and conduction loss, reduce input current ripple.Work as S2During shut-off, two
Pole pipe D4Prevention is stored in inductance L2In energy transmission into transformer primary side winding, but allow it to be delivered to output end.Together
When, pass through D4The leakage inductance energy of converter can be used in output end.Diode D4Voltage stress close to zero, this is great
Reduce D4Reverse-recovery problems, so as to improve efficiency.Switching tube S3Use reduce S2Current stress, thus can
Think that the two switching tubes select the MOSFET of more low current level.Although adding a switching tube in circuit, loss
But do not accordingly increase.The S1、S2Grid connects controller respectively.
The operation principle of the converter of proposition be able to can be illustrated from the key job in Fig. 2.To put it more simply, assuming Fig. 2
In all element be all preferable, and all work in the steady state.In order to describe D4Effect, it is contemplated that the leakage inductance of coupling inductance
Llk.In circuit analysis, operation mode is described as follows.
(1) [the t of mode 10＜ t≤t1]：Switching tube S1, S2Conducting, diode D1, D2In reverse blocking state, Lm1And Lm2
On electric current rise in input voltage effect lower linear, climbing is
(2) [the t of mode 21＜ t≤t2]：t1Moment, switching tube S1Shut-off, due to switching tube S1Upper outer and Cs1Effect, it is real
Existing zero voltage turn-off, switching tube S1Upper voltage linear rises, and climbing is
(3) [the t of mode 32＜ t≤t3]：t2Moment, magnetizing inductance Lm1Upper electric current is to CcFillOnElectricity, switching tube S1On electricity
Pressure continues linearly increasing, due to Cc＞ ＞ Cs1, switching tube S1On voltage build-up rate can be approximated to be
(4) [the t of mode 43＜ t≤t4]：t3Moment, CcOn voltage be raised to certain value so that output diode Do1It is positive
Conducting, converter starts to transmit energy to load.Lk1And CcGeneration resonance, Lk1On energy start to CcTransfer.
(5) [the t of mode 54＜ t≤t5]：t4Moment, CcStart working, energy, C are transmitted to loadcDo not influence S1Pipe and S2's
Work, the equivalent circuit of this mode is similar to the 4th operation mode.CcOn electric current due to Lk1And CcResonance and change direction,
Directly energy is transmitted to load.
(6) [the t of mode 65＜ t≤t6]：t5Moment, due to S1Upper C in parallels1Effect, S3Zero voltage turn-off, CcStop work
Make, Lk1And Cs1Form new resonance circuit.Cs1On energy be gradually pumped.
(7) [the t of mode 76＜ t≤t7]：t7Moment, switching tube S1Upper voltage drops to zero, S1Anti-paralleled diode conducting.
Lk1Electric current in voltage Uout/ N effect lower linears decline.Do1The fall off rate of cut-off current.S1Realize that no-voltage is open-minded, simultaneously
It also inhibits the Reverse recovery of output diode.
(8) [the t of mode 87＜ t≤t8]：t8Moment, switching tube S1Electric current drop to zero and start forward conduction, Do1On
Electric current is with Lk1Upper electric current rises and declined.t8Moment, Lk1On electric current be equal to magnetizing inductance on electric current, Do1On electric current
Drop to zero, Do1Shut-off.Input voltage is to Lm1And Lk1Charging.
Voltage gain
It is assumed that the magnetizing inductance L of coupling inductancem1=Lm2, the leakage inductance L of coupling inductancelk1=Llk2=0.By static state above
Job analysis is understood, in switching tube S1And S2When pipe is turned on, input voltage effect lower linear rises excitation inductance current again；In S1
And S2During shut-off, corresponding excitation inductance current is in voltage (Uout/N-Uin) linear decline under effect.Volt-second is used to magnetizing inductance
Equilibrium principle, output voltage gain expression formula is
M=Uout/Uin=N/ (1-D)
In formula：N is the turn ratio of coupling inductance；D is the dutycycle of converter.The converter has Boost characteristics, relatively
Suitable for boosting occasion.
Each element voltage stress
It is assumed that clamping capacitance is sufficiently large, switching tube S1And S2Shut-off voltage ripple ignore, switching tube S1And S2Electricity
Compression is
Switching tube S1And S2Voltage stress determined by input voltage and dutycycle.
Do1And Do2Voltage stress be
Ud=2Uout
Do1And Do2Voltage stress be 2 times of output voltage, because Reverse recovery is suppressed and current stress very little, Do1
And Do2Switching loss very little.
The consideration of the mode of operation of the converter of proposition
Application for new forms of energy resource such as photovoltaic, fuel cell is, it is necessary to which a kind of voltage gain is high, input current ripple is small
DC converter.It is therefore proposed converter be one preferably selection.Due to cross structure, the converter of proposition is not only
Higher voltage gain is provided, and extends by suppressing input current ripple the service life of fuel cell and battery block.
The converter of proposition is operated in continuous mode (CCM) and is more suitable for than being operated in discrete mode (DCM).In DCM patterns, although energy
Produce big output voltage and with small dutycycle, but output voltage is more sensitive to dutycycle.Therefore, closed-loop feedback circuit
Design it is more complicated.Moreover, input current ripple is larger during DCM patterns, so that the service life of fuel cell can be shortened,
Corresponding system effectiveness can also reduce.It is therefore proposed that converter be unsuitable for the application of new energy resources system in DCM patterns, this
Invention only considers the situation of CCM patterns.When dutycycle is less than 0.5, the converter of proposition still can work, but now transformer
The voltage of secondary side is relatively low, as a result make it that output voltage is relatively low.Therefore, the present invention only considers the situation that dutycycle is more than 0.5.
In order to verify the correctness of above analysis, 1kW principle prototype is completed in laboratory.Specification and main ginseng
Number index：Input voltage is 40V；Output voltage is 380V；Peak power output is 1kW；Working frequency is 50kHz；Main switch
Pipe S1、S2For 2 IRF250N parallel connections；Auxiliary switch Sc is IRF250N；Output diode Do1, Do2 are RHRP15120；Pincers
Position electric capacity Cc=2.2 μ F；Output filter capacitor Co=940 μ F；Shunt capacitance C on supervisors1、Cs2For 2.2nF；Coupling inductance is N
=n2：N1=60：22.
As can be seen from the test results, main switch realizes Zero-voltage soft switch action, reduces the switch of converter
Loss, meanwhile, when main switch is turned off, due to voltage spikes is smaller on switching tube, illustrates that leakage inductance energy is preferably absorbed.Whole
In switch periods, clamp switch pipe realizes Zero-voltage soft switch action.The Sofe Switch action of all power switch pipes is reduced
The switching loss of system, improves system effectiveness.The reverse recovery current of output diode is almost nil, substantially reduces by anti-
The loss brought to restoring current, also reduces EMI noise.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (5)
1. a kind of new isolation type active clamping alternation parallel Boost soft switch transducers, it is characterised in that including：First
Metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first inductance, the second inductance, the 3rd inductance, the 4th inductance, the 5th inductance, the 6th inductance, the 7th electricity
Sense, the 8th inductance, coupling inductance leakage inductance, the first diode, the second diode, load, output capacitance, the first electric capacity, the second electricity
Appearance, the 3rd electric capacity.
2. a kind of method of work of new isolation type active clamping alternation parallel Boost soft switch transducers, it is characterised in that
Two metal-oxide-semiconductor work schedules are set, and a time cycle of metal-oxide-semiconductor on, off is divided into 16 operation modes, due to circuit
The symmetry of structure only analyzes wherein t0、t1、t2、t3、t4、t5、t6、t7At eight time points, the method for work includes：
Operation mode 1, in t0To t1Stage：First metal-oxide-semiconductor, the conducting of the second metal-oxide-semiconductor, the first diode and the second diode are in
Electric current on reverse blocking state, the 7th inductance and the 8th inductance rises in input voltage effect lower linear, and climbing is
Operation mode 2, in t1To t2Stage：t1Moment, the first metal-oxide-semiconductor shut-off, due to outer and the first electric capacity on the first metal-oxide-semiconductor
Effect, realizes that voltage linear rises on zero voltage turn-off, the first metal-oxide-semiconductor, climbing is
Operation mode 3, in t2To t3Stage：t2Electric current on moment, the 7th inductance charges to the 3rd electric capacity, on the first metal-oxide-semiconductor
Voltage continues linearly increasing, because the 3rd electric capacity is much larger than the first electric capacity Cc＞ ＞ Cs1, the voltage build-up rate on the first metal-oxide-semiconductor can
To be approximately
Operation mode 4, in t3To t4Stage：t3Voltage on moment, the 3rd electric capacity is raised to certain value so that the first output two
Pole pipe forward conduction, converter starts to transmit energy to load.9th inductance and the 3rd electric capacity occur on resonance, the 9th inductance
Energy starts to shift to the 3rd electric capacity.
Operation mode 5, in t4To t5Stage：t4Moment, the 3rd electric capacity does not influence the work of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, this
The equivalent circuit of mode is similar to the 4th operation mode.Electric current on 3rd electric capacity is due to the 9th inductance and the resonance of the 3rd electric capacity
And change direction, directly transmit energy to load.
Operation mode 6, in t5To t6Stage：t5Moment, due to the effect of the first electric capacity in parallel on the first metal-oxide-semiconductor, the 3rd electric capacity
It is stopped, the 9th inductance and the first electric capacity form new resonance circuit.Energy on first electric capacity is gradually pumped.
Operation mode 7, in t6To t7Stage：t6Moment, the upper voltage of the first metal-oxide-semiconductor switch drops to zero, the first metal-oxide-semiconductor it is anti-simultaneously
Join diode current flow.Electric current on 9th inductance is in voltage Uout/ N effect lower linears decline.First output diode cut-off current
Fall off rate.First metal-oxide-semiconductor realizes that no-voltage is open-minded, while also inhibits the Reverse recovery of output diode.
Operation mode 8, in t7To t8Stage：t7Moment, the electric current of the first metal-oxide-semiconductor drops to zero and starts forward conduction, and the one or two
Electric current in pole pipe declines with electric current rising on the 9th inductance.t8Electric current on moment, the 9th inductance is equal to magnetizing inductance
On electric current, the electric current on the first diode drops to zero, the shut-off of the first diode.Input voltage is to the 9th inductance and the 7th electricity
Sense charging.
3. the work of new isolation type active clamping alternation parallel Boost soft switch transducers according to claim 2
Method, it is characterised in that：
It is assumed that the inductance of magnetizing inductance the 7th of coupling inductance is equal to the 8th inductance Lm1=Lm2, the inductance of leakage inductance the 9th of coupling inductance etc.
In the tenth inductance LIk1=LIk2=0.From quiescent operation analysis above, when the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are turned on,
Input voltage effect lower linear rises excitation inductance current again；When a metal-oxide-semiconductor and the second metal-oxide-semiconductor are turned off, corresponding magnetizing inductance
Electric current is in voltage (Uout/N-Uin) linear decline under effect.Volt-second equilibrium principle, output voltage gain table are used to magnetizing inductance
It is up to formula
M=Uout/Uin=N/ (1-D)
In formula：N is the turn ratio of coupling inductance；D is the dutycycle of converter.
The converter has Boost characteristics, relative to be applied to boosting occasion.
4. the work of new isolation type active clamping alternation parallel Boost soft switch transducers according to claim 2
Method, it is characterised in that also including ZVT Sofe Switch performance steps：
Due to aiding in the introducing of active clamping circuir, in whole switch periods, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are all zero electricity
Sofe Switch action is pressed, switching loss is substantially reduced.The fall off rate of first diode and the second diode cut-off current is
There is quiescent operation model analysis to understand that coupling inductance leakage inductance inhibits diode reverse recovery, reduce due to reversely extensive
The loss that telegram in reply stream is brought.
5. the work of new isolation type active clamping alternation parallel BOOST soft switch transducers according to claim 2
Method, it is characterised in that also including set voltage stress the step of：
It is assumed that clamping capacitance is sufficiently large, the shut-off voltage ripple of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor is ignored, the first metal-oxide-semiconductor and
The voltage stress of second metal-oxide-semiconductor is
The voltage stress of first metal-oxide-semiconductor and the second metal-oxide-semiconductor is determined by input voltage and dutycycle.
The voltage stress of first diode and the second diode is
Ud=2Uout
The voltage stress of first diode and the second diode is 2 times of output voltage, because Reverse recovery is suppressed and electric current
The switching loss very little of stress very little, the first diode and the second diode.
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| CN109362159A (en) * | 2018-12-25 | 2019-02-19 | 福州大学 | A kind of low ripple LED drive power with leakage inductance energy recycling |
| CN114337303A (en) * | 2021-12-31 | 2022-04-12 | 华南农业大学 | Current self-balancing coupling inductance type high-gain bidirectional DC/DC converter |
| US11398776B2 (en) | 2020-03-30 | 2022-07-26 | Delta Electronics, Inc. | Power conversion device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109362159A (en) * | 2018-12-25 | 2019-02-19 | 福州大学 | A kind of low ripple LED drive power with leakage inductance energy recycling |
| CN109362159B (en) * | 2018-12-25 | 2020-09-01 | 福州大学 | Low ripple LED drive power supply with leakage inductance energy recovery |
| US11398776B2 (en) | 2020-03-30 | 2022-07-26 | Delta Electronics, Inc. | Power conversion device |
| CN114337303A (en) * | 2021-12-31 | 2022-04-12 | 华南农业大学 | Current self-balancing coupling inductance type high-gain bidirectional DC/DC converter |
| CN114337303B (en) * | 2021-12-31 | 2023-11-28 | 华南农业大学 | Current self-balancing coupling inductance type high-gain bidirectional DC/DC converter |
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Application publication date: 20170804 |