CN106787738A - A kind of multiphase interleaving DC converter - Google Patents
A kind of multiphase interleaving DC converter Download PDFInfo
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- CN106787738A CN106787738A CN201710148087.0A CN201710148087A CN106787738A CN 106787738 A CN106787738 A CN 106787738A CN 201710148087 A CN201710148087 A CN 201710148087A CN 106787738 A CN106787738 A CN 106787738A
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- coupling inductance
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- converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Abstract
The invention discloses a kind of multiphase interleaving DC converter, including：Coupling inductance, bridge circuit and output filter capacitor, coupling inductance have the input of an input, k output end, and coupling inductance for connecting positive source；Bridge circuit includes：K phase bridge arms, midpoint per phase bridge arm as bridge circuit input, k input of bridge circuit is connected with k output end of coupling inductance respectively, first output end of bridge circuit is connected with the first input end of output filter capacitor, and the second output end of bridge circuit is connected with the second input of output filter capacitor.The present invention using crisscross parallel by the way of, each phase bridge arm current phase mutual deviation 360 °/k, the equivalent switching frequency of total current rises to original k times after each phase bridge arm current is superimposed；In the case where identical current ripples are filtered, inductance value needed for power frequency is higher is smaller, therefore can suppress circulation under the mode of crisscross parallel, can reduce required inductance value.
Description
Technical field
The invention belongs to DC converter technical field, more particularly, to a kind of multiphase interleaving DC converter.
Background technology
Two-way DC converter can realize energy in bidirectional flow, can realize traditional two effects of uni-directional converter,
The purpose of " dual-use " is reached, in battery charging and discharging, electric automobile, uninterruptible power system, power system, airplane power source system
The occasions such as system are more and more applied.
Existing non-isolation type two-way DC converter generally uses buck/boost structures, and this structural topology is simple,
Control program is ripe, but in order to reduce current ripples, it usually needs add larger filter inductance in low-pressure side.To solve this
Problem, typically using interleaving technique, but the crisscross parallel of traditional approach needs multiple filter inductances, simultaneously because driving letter
Number phase shift introduce the two-phase that the short-circuit mode of circuit causes staggeredly between there is larger circulation.It is therefore desirable to be able to bear
The switching device of bigger stresses of parts uses the filter inductance of bigger inductance value to limit circulation.
The content of the invention
For the defect of prior art, the invention provides a kind of multiphase interleaving DC converter, it is therefore intended that base
Multiphase interleaving two-way DC converter is constructed in coupling inductance, circulation can be suppressed, while enabling differential mode filter inductance
According to the Frequency Design higher after crisscross parallel, so as to reduce required inductance value.
To achieve the above object, the invention provides a kind of multiphase interleaving DC converter, including：Coupling inductance,
Bridge circuit and output filter capacitor, the input that coupling inductance has an input, k output end, and coupling inductance are used
In connection positive source；Bridge circuit includes：K phase bridge arms, midpoint per phase bridge arm as bridge circuit input, bridge-type electricity
The k input on road is connected with k output end of coupling inductance respectively, first output end and output filter capacitor of bridge circuit
First input end be connected and as output cathode, the second output end of bridge circuit is defeated with the second of the output filter capacitor
Enter end to be connected and as output negative pole；Coupling inductance is used for suppression common mode circulation, and storage energy and differential mode are filtered；Bridge circuit
Carrier wave the mutual deviation 360 °/k, k of the drive signal of each phase bridge arm are the integer more than or equal to 2.
The present invention has the separating filtering electricity of the coupling inductance replacement conventional topologies of common mode circulation rejection ability using one
Sense structure, can reduce magnetic element quantity so that differential mode filter inductance can subtract according to the Frequency Design higher after interlocking
Inductance value needed for small.Coupling inductance has the effect of common mode circulation rejection ability and storage energy and differential mode filtering concurrently.Meanwhile, this hair
The bright coupling inductance can be spliced by multiple standard cores, be easy to standardized production.
Further, coupling inductance is k+1 rod structures, and the umber of turn of k posts is identical to be designated as N1, the winding turns of another post
Number scale is N2；K+1 leading-out terminal of side is connected in the winding of k+1 posts, and umber of turn is N2 in k+1 leading-out terminal of opposite side
Leading-out terminal as coupling inductance input, umber of turn exports for the k leading-out terminal of N1 respectively as k of coupling inductance
End.
Further, the sectional area of k+1 posts magnetic core is identical.
Further, the k+1 post windings of coupling inductance around to all same.
Further, umber of turn is to open air gap in the magnetic pole middle part of N2, and fills with non-ferromagnetic substance.
Further, it is filling air, insulating tape, plastics, paper, low magnetic-conductive adhesive in the middle part of the magnetic pole of N2 in umber of turn
Water, magnetic rubber powder or bead glue.
The present invention is using after by the way of crisscross parallel, and 360 °/k of each phase bridge arm current phase mutual deviation, each phase bridge arm current is folded
Plus the equivalent switching frequency of rear total current rises to original k times；In the case where identical current ripples are filtered, power frequency
Inductance value needed for higher is smaller, therefore can suppress circulation under the mode of crisscross parallel, can reduce required inductance value.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the invention.
Fig. 2 is a kind of circuit theory diagrams that first embodiment of the invention is provided.
Fig. 3 is a kind of circuit theory diagrams that second embodiment of the invention is provided.
Fig. 4 is the circuit theory diagrams of three-phase crisscross parallel two-way DC converter provided in an embodiment of the present invention.
Fig. 5 is a kind of coupling inductance structure chart of three-phase crisscross parallel DC converter provided in an embodiment of the present invention.
Fig. 6 is a kind of coupling inductance structure chart of provided in an embodiment of the present invention four staggered parallel connection direct converters.
Fig. 7 is a kind of coupling inductance structure chart of the staggered parallel connection direct converters of k provided in an embodiment of the present invention.
Fig. 8 is the PWM of 120 ° of the phase-shifting carrier wave of three-phase crisscross parallel two-way DC converter provided in an embodiment of the present invention
Ripple modulated process figure.
Fig. 9 is the PWM of the 360 °/k of phase-shifting carrier wave of the staggered two-way DC converters in parallel of k provided in an embodiment of the present invention
Ripple modulated process figure.
Figure 10 is the current ripples figure of three-phase crisscross parallel two-way DC converter provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention relates to circuit field, and more particularly, to the two-way of a kind of coupling inductance and multiphase interleaving
DC converter.The present invention substitutes traditional discrete inductance or aspergillus ficuum suppression using the coupling inductance with loop current suppression ability
The coupling inductance of making can make system have clear improvement, meanwhile, it is capable to after making differential mode filter inductance according to crisscross parallel
Equivalent switching frequency design higher, the inductance value needed for reducing.
As shown in figure 1, the present invention relates to a kind of multiphase interleaving two-way DC converter based on coupling inductance construction,
Including bridge circuit 200, output filter capacitor 300 that coupling inductance 100, multiphase bridge arm are constituted；Wherein, the input of coupling inductance
End is connected with positive source, and k bridge arm midpoint of the bridge circuit that its k output end is constituted with multiphase bridge arm respectively is connected.It is many
Two output ends of the bridge circuit of phase bridge arm composition are connected through the two ends of output filter capacitor with output respectively.Multiphase bridge arm group
Into the carrier wave of drive signal of k bridge arm of bridge circuit differ from 360 °/k, the upper down tube of each bridge arm drives complementary；K is big
In the integer equal to 2.
In embodiments of the present invention, coupling inductance has k+1 rod structures, and the sectional area of k+1 post magnetic cores is identical.The coupling
The k+1 post windings of inductance around to all same, the umber of turn of wherein k posts is identical and is N1, and the umber of turn of another post is
N2；N1 depends on the common mode inductance inductance value of design, and N2 depends on the differential mode inductance inductance value of design, and the two is without direct numerical relation.
Umber of turn does not open air gap for the magnetic pole middle part of N1, and whole magnetic pole is high-permeability material, to ensure its larger inductance sense
Value, so as to realize the effect of loop current suppression；Umber of turn opens air gap for the magnetic pole middle part of N2, and fills with non-ferromagnetic substance,
It is intended to improve magnetic core anti-saturation ability during its transimission power, magnetic core saturated conditions when preventing inductance from flowing through larger current is protected
Card can also play a part of differential mode filtering in the case of the high current in scope of design.K+1 of the winding of k+1 posts wherein side
Leading-out terminal is connected, and umber of turn is the leading-out terminal of N2 as the input of coupling inductance, in addition k in k+1 leading-out terminal in addition
The bridge arm midpoint of the bridge circuit 200 that leading-out terminal is constituted with multiphase bridge arm respectively as k output end of coupling inductance is connected.
In embodiments of the present invention, after by the way of the crisscross parallel, 360 °/k of each phase bridge arm current phase mutual deviation, each phase
The equivalent switching frequency of total current rises to original k times after bridge arm current superposition.Filtering the situation of identical current ripples
Under, inductance value needed for power frequency is higher is smaller, therefore can reduce required inductance value, i.e. coupling inductance under the mode of crisscross parallel
The differential mode inductance inductance value that the middle number of turn is presented for the magnetic pole of N2.
In embodiments of the present invention, coupling inductance can realize loop current suppression act on, meanwhile, it is capable to play differential mode filtering with
Store the effect of energy.Because interleaved parallel converter is different with conventional converter directly in parallel, its k bridge arm it is defeated
Go out that voltage waveform phase is incomplete same, the voltage difference between two different bridge arms can be produced if acting on less inductance
Larger circulation.And coupling inductance is when circulation is flowed through, magnetic flux after being overlapped mutually effect remains to that larger magnetic flux is presented, so
Larger common mode inductance inductance value is presented, plays a part of to suppress circulation.
In embodiments of the present invention, coupling inductance is being realized suppressing circulation, needed for reducing while inductance value, structure letter
Single, magnetic core has high symmetry, can be spliced using multiple standard cores, is easy to production and processing.
By the contemplated above-mentioned technical proposal of the present invention, filter inductance can be made higher according to what is obtained after crisscross parallel
Equivalent switching frequency design, reduce needed for inductance value.
In embodiments of the present invention, bridge circuit 200 includes k bridge arm, and each bridge arm includes the positive string of two switching tubes
Connection connection, switching tube is connected in series midpoint of the end as bridge arm, and as an input of bridge circuit 200.Switching tube
Driving stage is used to receive drive signal, the drive signal complementation that two driving stages of switching tube are received in each bridge arm, any two
360 °/the k of carrier wave mutual deviation of the drive signal of individual bridge arm.If switching tube selects insulated gate bipolar transistor, it drives extremely
Gate pole；If switching tube selects Metal-Oxide Semiconductor FET, it drives extremely grid；The switching tube of remaining type
Also there is corresponding driving stage.
In embodiments of the present invention, output filter capacitor 300 is used to filter the voltage ripple of output voltage, and its value depends on
To the requirement of output voltage ripple when converter design, required output voltage ripple is smaller, and output capacitance capacitance is bigger.
The present invention proposes a kind of multiphase interleaving two-way DC converter based on coupling inductance, enables to filtered electrical
Feel and being designed according to the equivalent switching frequency higher obtained after crisscross parallel, the inductance value needed for reducing.On the basis of Fig. 1,
Switching device is replaced by diode and obtains multiphase interleaving DC converter as shown in Figure 2 and Figure 3 also in of the invention
Hold, repeat no more.
Three-phase, four phases, a kind of coupling inductance of the staggered parallel connection direct converters of k are respectively as shown in Fig. 5, Fig. 6, Fig. 7
Structure chart.The present invention is explained the present invention by taking the coupling inductance of three-phase interleaved parallel converter as an example.Three-phase crisscross parallel
The coupling inductance of converter is made up of 4 magnetic poles, and the core cross-section product of each magnetic pole is identical.4 wherein 3 posts of magnetic pole are not
Air gap is opened, 1 post opens air gap in addition, and can fill with non-ferromagnetic substance, such as air, insulating tape, plastics, paper, low magnetic conduction
Glue, magnetic rubber powder, bead glue etc..Winding on 4 magnetic cores around to all same, wherein on 3 magnetic cores for not opening air gap
Umber of turn is mutually all N1, and another umber of turn opened on the magnetic core of air gap is N2.4 wherein one end of winding are connected, around
The group number of turn is respectively A, B, C for being connected to three bridge arm midpoints of three-phase bridge circuit for the other end of 3 windings of N1, around
The group number of turn is used to be connected to the positive pole of input power for the other end of the winding of N2 for N.Number of turn N1 determines the inductance value of common mode inductance
Size, the size of air gap depends on input current size, prevents magnetic core saturation, and number of turn N2 then together decides on integrated difference with air gap
The size of mould filter inductance.
For the coupling inductance of four staggered parallel connection direct converters, then 5 magnetic poles are had, wherein 4 magnetic poles do not open gas
Gap, another magnetic pole opens air gap, and fills with non-ferromagnetic substance.Its winding technique mode and number of turn determination mode are with reference to three
The coupling inductance of staggered parallel connection direct converter.
For the coupling inductance of the staggered parallel connection direct converters of k, then k+1 root magnetic poles are had, wherein k roots magnetic pole does not open gas
Gap, another magnetic pole opens air gap, and fills with non-ferromagnetic substance.Its winding technique mode and number of turn determination mode are with reference to three
The coupling inductance of staggered parallel connection direct converter.
The present invention is explained the present invention by taking three-phase crisscross parallel two-way DC converter as an example.Fig. 4 shows this hair
The structural representation of three-phase crisscross parallel two-way DC converter, for convenience of description, illustrate only and this hair in bright embodiment
The related part of bright embodiment, it is as described below to be the situation that power in Fig. 4 is flowed to V2 by V1, when power is reversely flowed to by V2
Situation is similar to during V1, repeats no more.Specifically, details are as follows：
Described in the present embodiment based on coupling inductance three-phase crisscross parallel two-way DC converter include coupling inductance 100,
Three-phase bridge circuit 200, output filter capacitor 300；The first input end of coupling inductance 1 is connected with input power positive pole, coupling electricity
Feel 100 first, second, third output ends to be connected with the input of three-phase bridge circuit 200 first, second, third respectively.Three-phase bridge
The output end of formula circuit 200 first is connected as output cathode, three-phase bridge circuit with the first input end of output filter capacitor 300
200 second output ends are connected as output negative pole with the input of output filter capacitor 300 second.
Three upper pipes of the same bridge arm of bridge arm of three-phase bridge circuit are complementary with the drive signal of down tube, and upper down tube complementation is led
It is logical, 120 ° of drive signal mutual deviation between the down tube of the upper pipe of different bridge arms or different bridge arms.Three-phase bridge circuit is used for will coupling
Inductance is connected with input or output.
Coupling inductance is used to suppress the three-phase of crisscross parallel, i.e., one phase and two-phase, two-phase and three-phase, between three-phase and a phase
Circulation, while play a part of energy stores with filtering.It is characterized in showing circulation larger induction reactance, suppresses circulation big
It is small, less induction reactance is shown to input current, the situation of inductance saturation when can prevent larger electric current from flowing through coupling inductance.
Driving PWM waveform and its generation of a kind of three-phase crisscross parallel two-way DC converter for being proposed are shown in Fig. 8
Principle.Modulating wave is the output result of control algolithm, and final three-phase bridge circuit can ultimately generate output voltage according to modulating wave.
Carrier wave is used to be modulated modulating wave, and generation can be used for the PWM ripples of drive power switch device.In the routine without crisscross parallel
In DC converter, only a kind of carrier wave, usually one triangular wave, the frequency of triangular wave is switching frequency.It is staggered three
In two-way DC converter in parallel, there are three carrier waves, be respectively first carrier, the second carrier wave, the 3rd carrier wave.Hereinafter illustrate
PWM ripple generating process.First carrier, the second carrier wave, the 3rd carrier wave carry out computing with modulating wave respectively.When modulating wave is more than carrier wave
When, high level is exported, then export low level when modulating wave is less than carrier wave.First carrier is used with the result of modulating wave comparison operation
The upper pipe of the first bridge arm (a phase bridge arm) in three-phase bridge circuit is driven, i.e. first switch pipe, therewith complementary driving are believed
Number for driving corresponding down tube, i.e. second switch pipe.Second carrier wave is used to drive three-phase with the result of modulating wave comparison operation
The upper pipe of the second bridge arm (two-phase bridge arm) in bridge circuit, i.e. the 3rd switching tube, complementary drive signal is for driving therewith
Corresponding down tube, i.e. the 4th switching tube.The result of the 3rd carrier wave and modulating wave comparison operation is used to driving in three-phase bridge circuit
The 3rd bridge arm (three-phase bridge arm) upper pipe, i.e. the 5th switching tube, therewith complementary drive signal be used to drive corresponding down tube,
That is the 6th switching tube.
Fig. 9 shows the driving PWM waveform and its generating principle of the staggered two-way DC converters in parallel of k.It is per mutually load
360 °/k is differed between ripple, is relatively obtained with every phase carrier wave ratio according to modulating wave per phase PMW ripples, and for driving corresponding electric power to open
Close device.
Figure 10 show the output current ripple of three-phase crisscross parallel two-way DC converter provided in an embodiment of the present invention
Figure.Understand, using coupling inductance after, according to the less inductance that the equivalent switching frequency higher obtained after crisscross parallel is designed
Value, can also make the current ripples of system reach identical effect.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, it is not used to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should include
Within protection scope of the present invention.
Claims (6)
1. a kind of multiphase interleaving DC converter, it is characterised in that including：Coupling inductance (100), bridge circuit (200)
With output filter capacitor (300)；
The coupling inductance (100) is used for an input, k output end, and the input of the coupling inductance (100)
Connection positive source；The bridge circuit (200) includes：K phase bridge arms, per the midpoint of phase bridge arm as the bridge circuit
(200) input, k input of the bridge circuit (200) respectively with k output end of the coupling inductance (100)
Connection, the first output end of the bridge circuit (200) is connected and makees with the first input end of the output filter capacitor (300)
It is output cathode, the second output end of the bridge circuit (200) and the second input phase of the output filter capacitor (300)
Even and as output negative pole；
The coupling inductance (100) filters for suppression common mode circulation, storage energy and differential mode；In the bridge circuit (200)
Carrier wave the mutual deviation 360 °/k, k of the drive signal of each phase bridge arm are the integer more than or equal to 2.
2. multiphase interleaving DC converter as claimed in claim 1, it is characterised in that the coupling inductance (100) is k
+ 1 rod structure, the umber of turn of k posts is identical to be designated as N1, and the umber of turn of another post is designated as N2；
K+1 leading-out terminal of side is connected in the winding of k+1 posts, umber of turn going out for N2 in k+1 leading-out terminal of opposite side
Line end as coupling inductance input, umber of turn for N1 k leading-out terminal respectively as coupling inductance k output end.
3. multiphase interleaving DC converter as claimed in claim 2, it is characterised in that the section of the k+1 posts magnetic core
Product is identical.
4. multiphase interleaving DC converter as claimed in claim 2 or claim 3, it is characterised in that the k+1 of the coupling inductance
Post winding around to all same.
5. the multiphase interleaving DC converter as described in claim any one of 2-4, it is characterised in that umber of turn is N2
Magnetic pole middle part open air gap, and fill with non-ferromagnetic substance.
6. multiphase interleaving DC converter as claimed in claim 5, it is characterised in that in umber of turn be the magnetic pole of N2
Middle part filling air, insulating tape, plastics, paper, low magnetic conduction glue, magnetic rubber powder or bead glue.
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| CN110875683A (en) * | 2018-08-31 | 2020-03-10 | 南京南瑞继保电气有限公司 | Redundant staggered parallel DC-DC converter and control method thereof |
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| CN112311262A (en) * | 2020-10-21 | 2021-02-02 | 湖南大学 | Single-phase current type inverter, inverter circuit and control method thereof |
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| CN113745702A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Electric vehicle, heating method and device of power battery of electric vehicle and storage medium |
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