CN106981993A - A kind of efficiently two-way DC DC converters - Google Patents
A kind of efficiently two-way DC DC converters Download PDFInfo
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- CN106981993A CN106981993A CN201710357898.1A CN201710357898A CN106981993A CN 106981993 A CN106981993 A CN 106981993A CN 201710357898 A CN201710357898 A CN 201710357898A CN 106981993 A CN106981993 A CN 106981993A
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- Prior art keywords
- switching tube
- electric capacity
- bidirectional
- converter
- connection
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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
Abstract
The invention discloses a kind of efficiently two-way DC DC converters, it includes condenser network, the first two-way DC DC translation circuits of isolation, the second two-way DC DC translation circuits of isolation and filter capacitor, the condenser network includes the 4th electric capacity and the 5th electric capacity of series connection with it, the two ends of the condenser network as this efficiently two-way DC DC converters the first connection end, the two ends of 4th electric capacity isolate the two ends connection of two-way DC DC translation circuit input sides with described first respectively, the two ends of 5th electric capacity isolate the two ends connection of two-way DC DC translation circuit input sides with described second respectively, the output end of the two-way DC DC translation circuits of output end connection second isolation of the two-way DC DC translation circuits of first isolation, and it is connected to filter capacitor, the two ends of the filter capacitor as this efficiently two-way DC DC converters the second connection end.
Description
Technical field
The present invention relates to power converter topology field, relate more specifically to a kind of efficient bidirectional DC-DC converter.
Background technology
Bidirectional DC-DC converter is the converter for the DC-DC that can adjust energy two-way transmission as needed, and it is led
Apply to the fields such as DC uninterrupted power-supply system, space power system, DC motor Driver system, energy mix electric automobile
Close.Isolation bidirectional DC-DC converter can realize the transformation of electrical energy with electric insulation using transformer using magnetic coupling.It is existing
Isolation bidirectional DC-DC converter can reasonably be set as needed due to the turn ratio of transformer primary side and secondary coil
Meter, can obtain corresponding voltage, to realize voltage conversion.
In more application scenario, the input voltage of dc source is higher, and requires that the output voltage after its conversion is relatively low,
But the buck ratio of the high low pressure of existing isolation bidirectional DC-DC converter is usually no more than 5：1, in order to improve buck ratio,
The DC-DC conversion of promotion step-down ratio is mostly obtained using modes such as crisscross parallel Boost modes, the boostings of many level Boosts at present
Device.It can obtain higher buck ratio than traditional DC-DC converter, but its buck is only reached more than 10 again than general, and
Higher buck ratio can not be obtained.
In consideration of it, being necessary that a kind of efficient bidirectional DC-DC converter for obtaining promotion step-down ratio of offer is above-mentioned to solve
Defect.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of efficient bidirectional DC-DC converter for obtaining promotion step-down ratio
Device.
In order to solve the above technical problems, the present invention provides a kind of efficient bidirectional DC-DC converter, the efficient bi-directional DC-DC
Converter includes condenser network, the first isolation bidirectional DC-DC converter circuit, the second isolation bidirectional DC-DC converter circuit and filter
Ripple electric capacity, the condenser network includes the 4th electric capacity and the 5th electric capacity connected with the 4th electric capacity, the condenser network
Two ends as the efficient bidirectional DC-DC converter the first connection end, the two ends of the 4th electric capacity respectively with described first every
Two ends from bidirectional DC-DC converter circuit input side are connected, and the two ends of the 5th electric capacity isolate two-way with described second respectively
The two ends connection of DC-DC conversion circuit input side, the output end connection described the of the first isolation bidirectional DC-DC converter circuit
The output end of two isolation bidirectional DC-DC converter circuits, and both ends of filter capacitor is connected to, the two ends of the filter capacitor are used as this
Second connection end of efficient bidirectional DC-DC converter.The first isolation bidirectional DC-DC converter circuit and the second isolation are double in the present invention
Input side series connection and outlet side to DC-DC conversion circuit are connected in parallel, and isolate bidirectional DC-DC converter circuit based on above-mentioned two
Connection design, when first connection end access external power source when, it is described first, second isolation bidirectional DC-DC converter circuit
It can obtain under the half voltage that power supply is accessed in first connection end, same transformer turns ratio, higher decompression can be obtained
Than；And when external power source is accessed in second connection end, the output voltage of two isolation bidirectional DC-DC converter circuits can be carried out
Superposition, the low voltage transition of input is higher output voltage, and then obtains higher step-up ratio.
Its further technical scheme is：The first isolation bidirectional DC-DC converter circuit is opened including the first transformer, second
Close pipe and the 3rd switching tube；Wherein, the different name end of the first primary winding connects one end of the 4th electric capacity,
Its Same Name of Ends is connected to the other end of the 4th electric capacity, the first transformer secondary output winding after being connected with the second switch pipe
Same Name of Ends and described second one end for isolating bidirectional DC-DC converter circuit output side and one end of filter capacitor connect, its is different
With second other end and filter capacitor for isolating bidirectional DC-DC converter circuit output side after name end and the 3rd switching tube series connection
The other end is connected.
Its further technical scheme is：The first isolation bidirectional DC-DC converter circuit also includes the first clamp circuit, institute
The first clamp circuit is stated including first switch pipe and the first electric capacity, the first switch pipe connected with first electric capacity after simultaneously
It is coupled to the first primary winding two ends.Based on the design of the first clamp circuit, after can second switch pipe be turned off
Transient peak energy is released by the first electric capacity and first switch pipe on the circuit, to prevent that the second switch pipe from being damaged
It is bad.
Its further technical scheme is：The second isolation bidirectional DC-DC converter circuit is opened including the second transformer, the 5th
Close pipe and the 6th switching tube；Wherein, the different name end of the second primary winding be connected in the 5th electric capacity with
One end of 4th capacitance connection, its Same Name of Ends is connected to the another of the 5th electric capacity after being connected with the 5th switching tube
End, the Same Name of Ends of the second transformer secondary output winding is connected to same with the first transformer secondary output winding in the filter capacitor
One end of name end connection, its different name end is connected in the filter capacitor and the 3rd switching tube after being connected with the 6th switching tube
One end of connection.
Its further technical scheme is：The second isolation bidirectional DC-DC converter circuit also includes the second clamp circuit, institute
The second clamp circuit is stated including the 4th switching tube and the second electric capacity, the 4th switching tube connected with second electric capacity after simultaneously
It is coupled to the second primary winding two ends.
Its further technical scheme is：The first isolation bidirectional DC-DC converter circuit includes the 3rd transformer, the first electricity
Sense, the 7th switching tube, the 8th switching tube and the 9th switching tube；Wherein, the Same Name of Ends of the 3rd primary winding with
One end of the 4th electric capacity is connected to after the 7th switching tube series connection, its different name end connects after being connected with the 8th switching tube
The other end of the 4th electric capacity is connected to, the Same Name of Ends of the 3rd transformer secondary output winding connects one end of first inductance,
The other end of first inductance and described second one end for isolating bidirectional DC-DC converter circuit output side and one end of filter capacitor
Connection, after the series connection of its different name end and the 9th switching tube with this second isolate bidirectional DC-DC converter circuit output side the other end and
The other end connection of filter capacitor.
Its further technical scheme is：The first isolation bidirectional DC-DC converter circuit also includes the first reset circuit, institute
Stating the first reset circuit includes the first diode and the second diode, the anode of first diode and the 3rd transformer
The different name end connection of armature winding, its negative electrode is connected to the one end being connected in the 4th electric capacity with the 7th switching tube, and described the
The negative electrode of two diodes is connected with the Same Name of Ends of the 3rd primary winding, and its anode is connected to the 4th electric capacity
The other end.Based on the design of first reset circuit, can after two switching tubes shut-off of the 3rd primary winding side,
By the leakage inductance energy described in diode absorption on the 3rd transformer, leakage inductance energy can be avoided to give switch junction capacitance charging, led
Cause switching tube both end voltage pressure-resistant more than pipe and damage.
Its further technical scheme is：The first isolation bidirectional DC-DC converter circuit includes the 4th transformer, the second electricity
Sense, the tenth switching tube, the 11st switching tube and the 12nd switching tube；Wherein, the 4th primary winding is of the same name
End is connected to one end in the 5th electric capacity with the 4th capacitance connection, its different name end after being connected with the tenth switching tube
Be connected to the other end of the 5th electric capacity after being connected with the 11st switching tube, the 4th transformer secondary output winding it is of the same name
One end of end connection second inductance, the other end of second inductance is connected in filter capacitor and first inductance connection
One end, its different name end and the 12nd switching tube are connected to be connected in filter capacitor with the 9th switching tube one after connecting
End.
Its further technical scheme is：The first isolation bidirectional DC-DC converter circuit also includes the second reset circuit, institute
Stating the second reset circuit includes the 3rd diode and the 4th diode, anode and the 4th transformer of the 3rd diode
The different name end connection of armature winding, its negative electrode is connected to one end with the 4th capacitance connection in the 5th electric capacity, described
The negative electrode of 4th diode is connected with the Same Name of Ends of the 4th primary winding, and its anode is connected to the 5th electric capacity
The other end.
Its further technical scheme is：The switching tube selects MOSFET, SiC or IGBT.
Compared with prior art, the first isolation bidirectional DC-DC converter circuit in efficient bidirectional DC-DC converter of the invention
Input side series connection and outlet side with the second isolation bidirectional DC-DC converter circuit are connected in parallel, based on two isolation bi-directional DC-DCs
The connection design of translation circuit, when energy forward flow, i.e., when first connection end access external power source, described the
First, the second isolation bidirectional DC-DC converter circuit can obtain the half voltage that power supply is accessed in first connection end, same change
Under the depressor turn ratio, higher step-down ratio can be obtained；And when energy back flows, i.e., when second connection end external power supply
When, the output voltage of two isolation bidirectional DC-DC converter circuits can be overlapped, and the low voltage transition of input is higher output
Voltage, and then obtain higher step-up ratio.
Brief description of the drawings
Fig. 1 is the block diagram of efficiently bidirectional DC-DC converter of the invention.
Fig. 2 is two isolation bidirectional DC-DC converter circuit first embodiments in efficiently bidirectional DC-DC converter of the invention
Physical circuit schematic diagram.
Fig. 3 is two isolation bidirectional DC-DC converter circuit second embodiments in efficiently bidirectional DC-DC converter of the invention
Physical circuit schematic diagram.
Embodiment
To make one of ordinary skill in the art be more clearly understood from the object, technical solutions and advantages of the present invention, with
Under the present invention is further elaborated in conjunction with the accompanying drawings and embodiments.
Reference picture 1, Fig. 1 illustrates the square frame principle schematic diagram of efficiently bidirectional DC-DC converter 10 of the invention.Such as accompanying drawing institute
Show, the efficient bidirectional DC-DC converter 10 include the isolation of condenser network 13, first bidirectional DC-DC converter circuit 11, second every
From bidirectional DC-DC converter circuit 12 and filter capacitor C3, the condenser network include the 4th electric capacity C4 and with the 4th electricity
Hold the 5th electric capacity C5 of C4 series connection, the two ends of the condenser network 13 connect as the first of the efficient bidirectional DC-DC converter 10
End is connect, the two ends of the 4th electric capacity C4 isolate the two ends company of the input side of bidirectional DC-DC converter circuit 11 with described first respectively
Connect, the two ends of the 5th electric capacity C5 isolate the two ends connection of the input side of bidirectional DC-DC converter circuit 12 with described second respectively,
Output end connection the second isolation bidirectional DC-DC converter circuit 12 of the first isolation bidirectional DC-DC converter circuit 11
Output end, and filter capacitor C3, the filter capacitor C3 two ends are connected to as the of the efficient bidirectional DC-DC converter 10
Two connection ends.In the present embodiment when energy forward flow, the first connection end, can external power supply, then as direct-flow input end
Two connection ends, can external load as DC output end；And when energy back flows, then the second connection end is inputted as direct current
End, the first connection end is used as DC output end.The first isolation bidirectional DC-DC converter circuit 11 and the second isolation are two-way in the present invention
The input side of DC-DC conversion circuit 12 is connected and outlet side is connected in parallel, when energy forward flow, i.e., when the described first connection
When terminating into external power source, the first, second isolation bidirectional DC-DC converter circuit can obtain the first connection end access
Under one half voltage of power supply, same transformer turns ratio, higher step-down ratio can be obtained；And when energy back flows, i.e. institute
When stating the second connection end external power supply, then the output voltage of two isolation bidirectional DC-DC converter circuits can be overlapped, input
Low voltage transition is higher output voltage, and then obtains higher step-up ratio.
Reference picture 2, Fig. 2 illustrates two isolation bidirectional DC-DC converter electricity in efficiently bidirectional DC-DC converter 10 of the invention
The physical circuit schematic diagram of road first embodiment.In the embodiment shown in the figures, the first isolation bidirectional DC-DC converter electricity
Road 11 includes the first transformer T1, second switch pipe Q2, the 3rd switching tube Q3 and the first clamp circuit 111；In the present invention
Diode is come with switching tube.Preferably, the switching tube selects MOSFET, SiC or IGBT.Wherein, described first becomes
The different name end of depressor T1 armature windings connects one end of the 4th electric capacity C4, and its Same Name of Ends is connected with the second switch pipe Q2
The 4th electric capacity C4 other end is connected to afterwards, and the Same Name of Ends of the first transformer T1 secondary windings is isolated double with described second
Connected to one end of the outlet side of DC-DC conversion circuit 12 and filter capacitor C3 one end, its different name end is gone here and there with the 3rd switching tube Q3
The other end after connection with second other end and filter capacitor C3 for isolating the outlet side of bidirectional DC-DC converter circuit 12 is connected；Institute
Stating the first clamp circuit 111 includes first switch pipe Q1 and the first electric capacity C1, the first switch pipe Q1 and the described first electricity
Hold C1 series connection after be connected in parallel in the first transformer T1 armature windings two ends, the present embodiment, the first electric capacity C1 not with institute
The one end for stating the Q1 connections of first switch pipe is connected with the different name end of the first transformer T1 armature windings, first transformer
The Same Name of Ends of T1 armature windings is connected with the first switch pipe Q1.Because second switch pipe Q2 from opening state is converted to shut-off shape
The moment of state, due to the presence of leakage inductance, electric current thereon can not sport zero, and the electric current of its afterflow will be at the beginning of the first transformer T1
Level side produces peak voltage, and second switch pipe Q2 both end voltages may be caused pressure-resistant more than pipe and damaged, and based on this circuit
In the first clamp circuit 111 design, its can by second switch pipe Q2 turn off transient peak energy pass through first switch pipe Q1
The diode carried is stored into the first electric capacity C1, and the afterflow energy of primary side leakage inductance can be avoided to give second switch pipe Q2 junction capacity
Charging, causes second switch pipe Q2 both end voltages pressure-resistant more than pipe and damages.
In some embodiments, such as the present embodiment, the second isolation bidirectional DC-DC converter circuit 12 and described first
Isolate bidirectional DC-DC converter 11 structures of circuit identical.The second isolation bidirectional DC-DC converter circuit 12 includes the second transformer
T2, the 5th switching tube Q5, the 6th switching tube Q6 and the second clamp circuit 121；Wherein, the second transformer T2 armature windings
Different name end connect one end be connected in the 5th electric capacity C5 with the 4th electric capacity C4, its Same Name of Ends is switched with the described 5th
The 5th electric capacity C5 other end is connected to after pipe Q5 series connection, the Same Name of Ends of the second transformer T2 secondary windings is connected to institute
State the one end being connected in filter capacitor C3 with the Same Name of Ends of the first transformer T1 secondary windings, its different name end and the 6th switching tube Q6
The one end being connected in the filter capacitor C3 with the 3rd switching tube Q3 is connected to after series connection；Second clamp circuit 121
Including the 4th switching tube Q4 and the second electric capacity C2, the 4th switching tube Q4 is connected in parallel to institute after being connected with the second electric capacity C2
State in the second transformer T2 armature windings two ends, the present embodiment, the second electric capacity C2 is not connected with the 4th switching tube Q4
One end be connected with the different name end of the second transformer T2 armature windings, the Same Name of Ends of the second transformer T2 armature windings
It is connected with the 4th switching tube Q4.
The work of first isolation bidirectional DC-DC converter circuit 11 is former in efficient bidirectional DC-DC converter 10 in the present embodiment
Reason is as follows：When primary side controlling switch is that second switch pipe Q2 is opened, the 4th electric capacity C4 powers, and input current is from the 4th electric capacity
C4 one end outflow, flows through the first transformer T1 armature winding different name ends and Same Name of Ends, now at the beginning of first transformer T1
The induced electromotive force of level winding side is upper just lower negative, then flows back to by second switch pipe Q2 the 4th electric capacity C4 other end, and is somebody's turn to do
The induced electromotive force of first transformer T1 secondary windings side is just, the 3rd switching tube Q3 will be in cut-off state, described under upper bear
First transformer T1 secondary windings lateral circuits do not work, the first transformer T1 storage energies, and first clamp circuit 111
In first switch pipe Q1 when the second switch pipe Q2 is opened be in cut-off state, i.e., described first clamp circuit 111 is not
Work.
When second switch pipe Q2 is turned off, the energy stored in the first transformer T1 be released to outlet side i.e. its it is secondary around
Hinder side.Now the induced electromotive force of the first transformer T1 armature windings side for it is upper it is negative under just, the induction electric of its secondary windings side
Gesture is upper just lower negative, and electric current flows out from the Same Name of Ends of the first transformer T1 secondary windings, flows through filter capacitor C3, the 3rd switching tube
Q3 and its different name end.
The afterflow energy for being stored in the first transformer T1 leakage inductances simultaneously is stored by the first switch pipe Q1 diodes carried
Into the first electric capacity C1, synchronously open the energy absorbed in first switch pipe Q1, the first electric capacity C1 and pass through first transformer
T1 is discharged into load and stored into leakage inductance, when the afterflow energy in leakage inductance is absorbed by the first electric capacity C1 completely, and first becomes
The electric current of depressor T1 armature windings side drops to zero, turns off first switch pipe Q1, now, the first electric capacity C1, first switch pipe Q1,
Leakage inductance, first this loop of transformer T1 armature windings side are disconnected, and inductive current can not be mutated, and electric current passes through leakage inductance, first
Transformer T1 armature windings side, the 4th electric capacity C4, second switch pipe Q2 body diode, return to leakage inductance, now, open second and open
Close pipe Q2, Q2 and realize that ZVS Sofe Switch is turned on.
In summary, when second switch pipe Q2 is opened, DC input voitage be added to the first transformer T1 it is primary around
Group, the first transformer T1 storage energies；When the second switch pipe Q2 is turned off, DC input voitage and first transformation
Device T1 armature windings disconnect, and the energy that the first transformer T1 is stored during the second switch pipe Q2 is opened passes through next
Level winding releasably gives external load；And now first clamp circuit 111 works, leaked after absorbing second switch pipe Q2 shut-offs
Feel the energy of afterflow, energy can be discharged into external load back through the first transformer T1 after energy absorption is complete and deposited
Store up in leakage inductance, by turning off first switch pipe Q1, second switch pipe Q2 ZVS Sofe Switch conducting is realized in then leakage inductance afterflow.
The operation principle of the second isolation bidirectional DC-DC converter circuit 12 isolates bidirectional DC-DC converter circuit 11 1 with described first
Cause, will not be repeated here.
Reference picture 3, Fig. 3 illustrates two isolation bidirectional DC-DC converter electricity in efficiently bidirectional DC-DC converter 10 of the invention
The physical circuit schematic diagram of road second embodiment.The present embodiment and the difference of first embodiment are that two described are isolated double
Different from the isolation bidirectional DC-DC converter circuit in first embodiment to the particular circuit configurations of DC-DC conversion circuit, first is real
Apply the isolation bidirectional DC-DC converter circuit in example and use reverse excitation circuit, and the isolation bi-directional DC-DC in the present embodiment becomes
Change circuit and use positive activation type circuit.
In some embodiments, such as the present embodiment, the first isolation bidirectional DC-DC converter circuit 11 includes the 3rd and become
Depressor T3, the first inductance L1, the 7th switching tube Q7, the 8th switching tube Q8, the 9th switching tube Q9 and the first reset circuit 112；
Wherein, the Same Name of Ends of the 3rd transformer T3 armature windings is connected to the 4th electricity after being connected with the 7th switching tube Q7
Hold C4 one end, its different name end is connected to the 4th electric capacity C4 other end after being connected with the 8th switching tube Q8, described the
The Same Name of Ends of three transformer T3 secondary windings connects one end of the first inductance L1, first inductance L1 other end with it is described
One end of the outlet side of second isolation bidirectional DC-DC converter circuit 12 and filter capacitor C3 one end connection, its different name end and the 9th
Switching tube Q9 series connection after with this second isolate the outlet side of bidirectional DC-DC converter circuit 12 the other end and filter capacitor C3 it is another
End connection；First reset circuit 112 includes the first diode D1 and the second diode D2, the sun of the first diode D1
Pole is connected with the different name end of the 3rd transformer T3 armature windings, and its negative electrode is connected in the 4th electric capacity C4 and opened with the 7th
One end of pipe connection is closed, the negative electrode of the second diode D2 is connected with the Same Name of Ends of the 3rd transformer T3 armature windings,
Its anode is connected to the other end of the 4th electric capacity C4., can be in armature winding based on the design of first reset circuit 112
After two switching tubes shut-off of side, by the leakage inductance energy described in the diode absorption on the 3rd transformer, leakage inductance can be avoided
Energy gives switch junction capacitance charging, causes switching tube both end voltage pressure-resistant more than pipe and damages.
In some embodiments, such as the present embodiment, the second isolation bidirectional DC-DC converter circuit 12 and above-mentioned first
Isolate bidirectional DC-DC converter 11 structures of circuit identical.The second isolation bidirectional DC-DC converter circuit 12 includes the 4th transformer
T4, the second inductance L2, the tenth switching tube Q10, the 11st switching tube Q11, the 12nd switching tube Q12 and second reset 122 electricity
Road；Wherein, the Same Name of Ends of the 4th transformer T4 armature windings is connected to described after being connected with the tenth switching tube Q10
With one end of the 4th capacitance connection in five electric capacity C5, its different name end is connected to after being connected with the 11st switching tube Q11
The 5th electric capacity C5 other end, the Same Name of Ends of the 4th transformer T4 secondary windings connects the one of the second inductance L2
End, second inductance L2 other end is connected to the one end being connected in filter capacitor C3 with the first inductance L1, its different name end
One end that C3 is connected with the 9th switching tube Q9 in filter capacitor is connected to after the 12nd switching tube Q12 series connection；Described
Two reset circuits 122 include the 3rd diode D3 and the 4th diode D4, the anode and the described 4th of the 3rd diode D3
The different name end connection of transformer T4 armature windings, its negative electrode is connected to the one of the 5th electric capacity C5 and the 4th capacitance connection
End, the negative electrode of the 4th diode D4 is connected with the Same Name of Ends of the 4th transformer T4 armature windings, and its anode is connected to
The other end of the 5th electric capacity C5.
The work of first isolation bidirectional DC-DC converter circuit 11 is former in efficient bidirectional DC-DC converter 10 in the present embodiment
Reason is as follows：When the 7th switching tube Q7 and the 8th switching tube Q8 are opened, the first diode D1 and the second diode D2
Reverse blocking state is in, first reset circuit 112 does not work；And input current flows from the 4th electric capacity C4 one end
Go out, flow through the 7th switching tube Q7, the 3rd transformer T3 armature windings Same Name of Ends, different name end, now the 3rd transformer T3
The induced electromotive force of armature winding side is upper just lower negative, then flows back to the 4th electric capacity C4 other end by the 8th switching tube Q8, and
The induced electromotive force of 3rd transformer T3 secondary windings side also to be upper just lower negative, electric current from T3 level of the 3rd transformer around
The Same Name of Ends of group is flowed into, and flows through the first inductance L1, filter capacitor C3, the 9th switching tube Q9 and its different name end.
When the 7th switching tube Q7 and the 8th switching tube Q8 is turned off, the first diode D1 and the second diode D2
Forward conduction state is in, first reset circuit 112 works, and is now stored in the afterflow energy of the 3rd transformer T3 leakage inductances
Amount needs are released, and electric current flows out from the different name end of the 3rd transformer T3 armature windings when it is released, and flows through the first diode
The Same Name of Ends of D1, the 4th electric capacity C4, the second diode D2 and its armature winding, now the 3rd transformer T3 armature windings side
Induced electromotive force for it is upper it is negative under just, the induced electromotive force of the 3rd transformer T3 secondary windings side also for it is upper it is negative under just, now the
Nine switching tube Q9 are in cut-off state, and the 3rd transformer T3 secondary windings lateral circuits do not work.
In summary, when the 7th switching tube Q7 and the 8th switching tube Q8 is opened, the 3rd transformer T3 armature windings
The electric current of side rises, and transmits energy to secondary windings, and the 9th switching tube Q9 conductings can release energy to external load；Work as institute
When stating the 7th switching tube Q7 and the 8th switching tube Q8 shut-offs, DC input voitage breaks with the 3rd transformer T3 armature windings
Open, now first reset circuit 112 works, absorb the energy of leakage inductance afterflow after two switching tube shut-offs, the 3rd transformer
T3 carries out magnetic reset.The operation principle of the second isolation bidirectional DC-DC converter circuit 12 isolates bi-directional DC-DC with described first
Translation circuit 11 is consistent, will not be repeated here.
As described above, the first isolation bidirectional DC-DC converter circuit and second in the efficient bidirectional DC-DC converter of the present invention
The input side series connection of isolation bidirectional DC-DC converter circuit and outlet side is connected in parallel, when energy forward flow, i.e., when described the
When external power source is accessed in one connection end, the first, second isolation bidirectional DC-DC converter circuit can obtain first connection
Terminate under the half voltage into power supply, same transformer turns ratio, higher step-down ratio can be obtained；And when energy back flowing
When, i.e., the second connection end external power supply when, two isolation bidirectional DC-DC converter circuits output voltages can be overlapped,
The low voltage transition of input is higher output voltage, and then obtains higher step-up ratio.
The preferred embodiments of the present invention are the foregoing is only, rather than any formal limitation is done to the present invention.This area
Technical staff various equivalent changes and improvement, all institutes within the scope of the claims can be imposed on the basis of above-described embodiment
The equivalent variations done or modification, all should fall under the scope of the present invention.
Claims (10)
1. a kind of efficient bidirectional DC-DC converter, the efficient bidirectional DC-DC converter includes condenser network, the first isolation pair
To DC-DC conversion circuit, the second isolation bidirectional DC-DC converter circuit and filter capacitor, it is characterised in that：The condenser network
Including the 4th electric capacity and the 5th electric capacity connected with the 4th electric capacity, the two ends of the condenser network are efficiently two-way as this
First connection end of DC-DC converter, the two ends of the 4th electric capacity isolate bidirectional DC-DC converter circuit with described first respectively
The two ends connection of input side, the two ends of the 5th electric capacity isolate bidirectional DC-DC converter circuit input side with described second respectively
Two ends connection, it is described first isolation bidirectional DC-DC converter circuit output end connection it is described second isolation bidirectional DC-DC converter
The output end of circuit, and both ends of filter capacitor is connected to, the two ends of the filter capacitor are used as the efficient bidirectional DC-DC converter
The second connection end.
2. efficiently bidirectional DC-DC converter as claimed in claim 1, it is characterised in that：The first isolation bi-directional DC-DC becomes
Changing circuit includes the first transformer, second switch pipe and the 3rd switching tube；Wherein, the first primary winding is different
Name end is connected to one end of the 4th electric capacity, and its Same Name of Ends is connected to the 4th electric capacity after being connected with the second switch pipe
The other end, the Same Name of Ends of the first transformer secondary output winding isolates bidirectional DC-DC converter circuit output side with described second
One end and the connection of one end of filter capacitor, second isolate bidirectional DC-DC converter after the series connection of its different name end and the 3rd switching tube with this
The other end connection of the other end and filter capacitor of circuit output side.
3. efficiently bidirectional DC-DC converter as claimed in claim 2, it is characterised in that：The first isolation bi-directional DC-DC becomes
Changing circuit also includes the first clamp circuit, and first clamp circuit includes first switch pipe and the first electric capacity, described first
Switching tube is connected in parallel to the first primary winding two ends after being connected with first electric capacity.
4. efficiently bidirectional DC-DC converter as claimed in claim 2, it is characterised in that：The second isolation bi-directional DC-DC becomes
Changing circuit includes the second transformer, the 5th switching tube and the 6th switching tube；Wherein, the second primary winding is different
Name end is connected to one end in the 5th electric capacity with the 4th capacitance connection, and its Same Name of Ends is connected with the 5th switching tube
The other end of the 5th electric capacity is connected to afterwards, and the Same Name of Ends of the second transformer secondary output winding is connected in the filter capacitor
The one end being connected with the Same Name of Ends of the first transformer secondary output winding, its different name end is connected to the filter after being connected with the 6th switching tube
The one end being connected in ripple electric capacity with the 3rd switching tube.
5. efficiently bidirectional DC-DC converter as claimed in claim 4, it is characterised in that：The second isolation bi-directional DC-DC becomes
Changing circuit also includes the second clamp circuit, and second clamp circuit includes the 4th switching tube and the second electric capacity, the described 4th
Switching tube is connected in parallel to the second primary winding two ends after being connected with second electric capacity.
6. efficiently bidirectional DC-DC converter as claimed in claim 1, it is characterised in that：The first isolation bi-directional DC-DC becomes
Changing circuit includes the 3rd transformer, the first inductance, the 7th switching tube, the 8th switching tube and the 9th switching tube；Wherein, described
The Same Name of Ends of three primary windings is connected to one end of the 4th electric capacity, its different name after being connected with the 7th switching tube
End is connected to the other end of the 4th electric capacity after being connected with the 8th switching tube, the 3rd transformer secondary output winding it is of the same name
One end of end connection first inductance, it is defeated that the other end of first inductance isolates bidirectional DC-DC converter circuit with described second
Go out one end of side and one end connection of filter capacitor, second isolate two-way DC- with this after the series connection of its different name end and the 9th switching tube
The other end connection of the other end and filter capacitor of DC translation circuit outlet sides.
7. efficiently bidirectional DC-DC converter as claimed in claim 6, it is characterised in that：The first isolation bi-directional DC-DC becomes
Changing circuit also includes the first reset circuit, and first reset circuit includes the first diode and the second diode, described first
The anode of diode is connected with the different name end of the 3rd primary winding, its negative electrode be connected in the 4th electric capacity with
One end of 7th switching tube connection, the Same Name of Ends of the negative electrode of second diode and the 3rd primary winding connects
Connect, its anode is connected to the other end of the 4th electric capacity.
8. efficiently bidirectional DC-DC converter as claimed in claim 6, it is characterised in that：The second isolation bi-directional DC-DC becomes
Changing circuit includes the 4th transformer, the second inductance, the tenth switching tube, the 11st switching tube and the 12nd switching tube；Wherein, institute
State the 4th primary winding Same Name of Ends connected with the tenth switching tube after be connected in the 5th electric capacity with it is described
One end of 4th capacitance connection, its different name end is connected to the other end of the 5th electric capacity after being connected with the 11st switching tube,
The Same Name of Ends of the 4th transformer secondary output winding connects one end of second inductance, and the other end of second inductance is connected to
With one end of first inductance connection in filter capacitor, its different name end is connected to filter capacitor after being connected with the 12nd switching tube
In one end for being connected with the 9th switching tube.
9. efficiently bidirectional DC-DC converter as claimed in claim 8, it is characterised in that：The first isolation bi-directional DC-DC becomes
Changing circuit also includes the second reset circuit, and second reset circuit includes the 3rd diode and the 4th diode, the described 3rd
The anode of diode is connected with the different name end of the 4th primary winding, its negative electrode be connected in the 5th electric capacity with
One end of 4th capacitance connection, the negative electrode of the 4th diode connects with the Same Name of Ends of the 4th primary winding
Connect, its anode is connected to the other end of the 5th electric capacity.
10. the efficient bidirectional DC-DC converter as described in claim 2,3,4,5,6 or 8, it is characterised in that：The switching tube
From MOSFET, SiC or IGBT.
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| CN201710357898.1A CN106981993A (en) | 2017-05-19 | 2017-05-19 | A kind of efficiently two-way DC DC converters |
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| CN201710357898.1A CN106981993A (en) | 2017-05-19 | 2017-05-19 | A kind of efficiently two-way DC DC converters |
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| CN108322052A (en) * | 2018-01-16 | 2018-07-24 | 许继电源有限公司 | A kind of power-supply system based on silicon carbide device and a kind of DC/DC devices |
| CN108539983A (en) * | 2018-04-19 | 2018-09-14 | 西安交通大学 | A kind of two-way circuit of reversed excitation of small-sized fast charging and discharging |
| CN111527687A (en) * | 2019-07-08 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Switch power supply circuit and converter of integrated vehicle-mounted charger |
| CN111527688A (en) * | 2019-07-08 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit of integrated vehicle-mounted charger |
| CN111542997A (en) * | 2019-07-08 | 2020-08-14 | 深圳欣锐科技股份有限公司 | Active clamping forward and reverse excitation combined circuit of integrated vehicle-mounted charger |
| CN111542995A (en) * | 2019-07-08 | 2020-08-14 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit of integrated vehicle-mounted charger |
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| CN103117577A (en) * | 2013-02-04 | 2013-05-22 | 杭州高特电子设备有限公司 | Energy balance circuit for battery pack of electric vehicle |
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| CN1758521A (en) * | 2005-11-11 | 2006-04-12 | 福州大学 | Single-stage two-way step down DC converter type high frequency link inverter |
| CN103117577A (en) * | 2013-02-04 | 2013-05-22 | 杭州高特电子设备有限公司 | Energy balance circuit for battery pack of electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108322052A (en) * | 2018-01-16 | 2018-07-24 | 许继电源有限公司 | A kind of power-supply system based on silicon carbide device and a kind of DC/DC devices |
| CN108539983A (en) * | 2018-04-19 | 2018-09-14 | 西安交通大学 | A kind of two-way circuit of reversed excitation of small-sized fast charging and discharging |
| CN111527687A (en) * | 2019-07-08 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Switch power supply circuit and converter of integrated vehicle-mounted charger |
| CN111527688A (en) * | 2019-07-08 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit of integrated vehicle-mounted charger |
| CN111542997A (en) * | 2019-07-08 | 2020-08-14 | 深圳欣锐科技股份有限公司 | Active clamping forward and reverse excitation combined circuit of integrated vehicle-mounted charger |
| CN111542995A (en) * | 2019-07-08 | 2020-08-14 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit of integrated vehicle-mounted charger |
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Application publication date: 20170725 |