CN109494991A - Bidirectional, dc conversion circuit - Google Patents
Bidirectional, dc conversion circuit Download PDFInfo
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- CN109494991A CN109494991A CN201811581127.1A CN201811581127A CN109494991A CN 109494991 A CN109494991 A CN 109494991A CN 201811581127 A CN201811581127 A CN 201811581127A CN 109494991 A CN109494991 A CN 109494991A
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- transistor
- conversion circuit
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- circuit
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Classifications
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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
- H02M3/33569—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 several active switching elements
- H02M3/33576—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 several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
Abstract
A kind of bidirectional, dc conversion circuit is connected between high-voltage end and low-pressure end, is repeated in work in charging stage, dead zone stage and discharge regime with predetermined period.Bidirectional, dc conversion circuit includes Boost-Buck conversion circuit LLC resonance circuit.In the charging stage, the input voltage that Boost-Buck conversion circuit is used to provide high-voltage end exports first voltage after being depressured, and LLC resonance circuit charges to low-pressure end after first voltage is depressured and is converted；In discharge regime, the output voltage that LLC resonance circuit provides low-pressure end is boosted and is exported after being converted second voltage, and Boost-Buck conversion circuit boosts to second voltage.LLC resonance circuit includes the first full-bridge conversion circuit, resonance circuit, the second full-bridge conversion circuit and switching circuit.Switching circuit establishes the electric connection between Boost-Buck conversion circuit and the first full-bridge conversion circuit in charging stage and discharge regime for disconnecting the electric connection between Boost-Buck conversion circuit and the first full-bridge conversion circuit at the dead zone stage.
Description
Technical field
The present invention relates to a kind of bidirectional, dc conversion circuits.
Background technique
With wind energy, solar energy this kind new energy apply greatly develop, battery energy storage technology as technology relative at
Ripe, the features such as possessing power density height, charge and discharge high conversion efficiency, not limited by geographic factors, is also rapidly developed.Mesh
Preceding energy-storage system battery terminal voltage is generally less than 100V, and solar battery/wind-driven generator voltage is up to 500V-800V, is
Transfer efficiency is further increased, the voltage of solar panel has been increased to 1200V-1500V and released by many companies at present
1400V system, it is contemplated that 1400V system will become following mainstream.
Mainstream is double based on two-way DC-DC (Direct Current-Direct Current, DC-DC) at present
It to charge-discharge circuit is realized by Buck/Boost circuit and full-bridge circuit, is realized by more complicated control circuit double
To charge and discharge control, because of the needs of electric current two-way flow, usual full-bridge circuit can only select common full-bridge to realize, cannot select
The soft switch topologies such as phase-shifting full-bridge cause machine system efficiency lower.
Summary of the invention
In view of this, it is necessary to provide a kind of lower bidirectional, dc conversion electricity of topological efficiency for improving two-stage hard switching
Road.
A kind of bidirectional, dc conversion circuit, is connected between high-voltage end and low-pressure end.Bidirectional, dc conversion circuit is with predetermined
Period is repeated in work in charging stage, dead zone stage and discharge regime.Bidirectional, dc conversion circuit includes Boost-
Buck conversion circuit and LLC resonance circuit.In the input voltage that charging stage, Boost-Buck conversion circuit provide high-voltage end
First voltage is exported after being depressured, LLC resonance circuit charges to low-pressure end after first voltage is depressured and is converted；
In discharge regime, low-pressure end electric discharge gives LLC resonance circuit to provide output voltage, and LLC resonance circuit rises output voltage
Second voltage is exported after pressure and conversion, Boost-Buck conversion circuit boosts to second voltage.LLC resonance circuit includes the
One full-bridge conversion circuit, resonance circuit, the second full-bridge conversion circuit and switching circuit.Switching circuit was used at the dead zone stage
The electric connection between Boost-Buck conversion circuit and the first full-bridge conversion circuit is disconnected, and in charging stage and discharge regime
Establish the electric connection between Boost-Buck conversion circuit and the first full-bridge conversion circuit.
Above-mentioned bidirectional, dc conversion circuit, in the dead zone stage, switching circuit controls LLC work in no-voltage and zero current shape
State, it can be achieved that energy conversion efficiency significantly promotion, reduce electromagnetic interference.
Detailed description of the invention
Fig. 1 is the module diagram of the bidirectional, dc conversion circuit of better embodiment of the present invention.
Fig. 2 is the circuit diagram of the first embodiment of bidirectional, dc conversion circuit described in Fig. 1.
Fig. 3 is the waveform diagram of the first transistor, third transistor and the 5th transistor in Fig. 2.
Fig. 4 is the circuit diagram of the second embodiment of bidirectional, dc conversion circuit described in Fig. 1.
Fig. 5 is the circuit diagram of the third embodiment of bidirectional, dc conversion circuit described in Fig. 1.
Main element symbol description
Bidirectional, dc conversion circuit 1,2,3
High-voltage end Vin
First input end H1
Second input terminal H2
Low-pressure end Load
Positive L+
Cathode L-
Boost-Buck conversion circuit 10
Switching circuit 20
LLC resonance circuit 30
Control circuit 4
Charging stage P1
Dead zone stage P2
Discharge regime P3
First full-bridge conversion circuit 32
Resonance circuit 34
Second full-bridge conversion circuit 36
The first transistor Q1
Second transistor Q2
Inductance L1
Switching transistor Q3
First capacitor C1
Third transistor Q4
4th transistor Q5
5th transistor Q6
6th transistor Q7
Transformer T1
First coil Lp
Second coil Ls
7th transistor Q8
8th transistor Q9
9th transistor Q10
Tenth transistor Q11
Second capacitor C2
First auxiliary transistor Q1a
Second auxiliary transistor Q2a
Third auxiliary transistor Q8a
4th auxiliary transistor Q9a
5th auxiliary transistor Q10a
6th auxiliary transistor Q11a
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
In the description of description and claims of this specification, it should be noted that unless otherwise specific regulation
And restriction, term " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to dismantling connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be and be directly connected to, centre can also be passed through
It does not connect and is indirectly connected with, can be the connection inside two elements or the interaction relationship of two elements.Term " first ", " the
Two " and " third " etc. are for distinguishing different objects, not for description particular order.For those of ordinary skill in the art
For, it can the concrete meaning of above-mentioned term in the present invention immediately as the case may be.
The specific embodiment of bidirectional, dc conversion circuit of the present invention is illustrated with reference to the accompanying drawing.
It is the module diagram of the bidirectional, dc conversion circuit 1 of one embodiment of the present invention also referring to Fig. 1.
The bidirectional, dc conversion circuit 1 can be applied to and off-network inverter, independent photovoltaic inverter, uninterruptible power system
In products such as (Uninterruptible Power System, UPS), but it is not limited to this.The bidirectional, dc conversion circuit 1
It is mainly used for battery charge or discharge.
The bidirectional, dc conversion circuit 1 is electrically connected at high-voltage end Vin and low-pressure end Load.The high-voltage end Vin packet
Include first input end H1 and the second input terminal H2.The high-voltage end Vin passes through the first input end H1 and second input
The voltage difference between H2 is held to provide input voltage.The low-pressure end Load includes anode L+ and cathode L-.First input
End H1 is positive input, and the second input terminal H2 is negative input.In the present embodiment, the low-pressure end Load can
Think the energy-storage travelling wave tubes such as battery, battery.The bidirectional, dc conversion circuit 1 is electrically connected with control circuit 2 as shown in Figure 2,
And work is repeated in charging stage P1, dead zone stage P2 with predetermined period under the control of the control circuit 2 and is put
Electric stage P3.The dead zone stage P2 is set between the charging stage P1 and the discharge regime P3, is institute in order to prevent
The element stated in bidirectional, dc conversion circuit 1 is damaged.In the charging stage P1, the bidirectional, dc conversion circuit 1 is by institute
It states and exports after input voltage is boosted to the low-pressure end Load, to charge to the low-pressure end Load.Described dead
Area stage P2, the work of bidirectional, dc conversion circuit 1 is in no-voltage and zero current condition.It is described in the discharge regime P3
Output is to institute after bidirectional, dc conversion circuit 1 is boosted the output voltage that low-pressure end Load progress discharge operation provides
The first input end H1 and the second input terminal H2 of high-voltage end Vin is stated, to realize the discharge operation of the low-pressure end Load.
The bidirectional, dc conversion circuit 1 includes Boost-Buck conversion circuit 10, switching circuit 20 and LLC resonance electricity
Road 30.
In the charging stage P1, the input voltage is depressured and is exported by the Boost-Buck conversion circuit 10
First voltage gives the LLC resonance circuit 30, and the first voltage export after being depressured again by the LLC resonance circuit 30
To the low-pressure end Load, to charge to the low-pressure end Load.
In the dead zone stage P2, the switching circuit 20 disconnects the Boost-Buck conversion circuit 10 and the LLC
Electric connection between resonance circuit 30, so that the Boost-Buck conversion circuit 10 and the LLC resonance circuit 30 are in
Sofe Switch state, to work in no-voltage and zero current condition.
It is discharged in the discharge regime P3, the low-pressure end Load and output voltage is provided, and is humorous by the LLC
Vibration circuit 30 exports second voltage to the Boost-Buck conversion circuit 10, to realize putting for the low-pressure end Load after boosting
Electrically operated, output is to the high-voltage end Vin after the Boost-Buck conversion circuit 10 boosts to the second voltage.
The Boost-Buck conversion circuit 10 includes inductance L1, the first transistor Q1 and second transistor Q2.It is described
The grid of the grid of the first transistor Q1 and the second transistor Q2 are electrically connected with the control circuit 4 respectively.Described
The drain electrode of the first end and the second transistor Q2 of the source electrode of one transistor Q1 and the inductance L1 is electrically connected, and described first
The drain electrode of transistor Q1 and the first input end H1 are electrically connected.The source electrode of the second transistor Q2 and second input
H2 is held to be electrically connected.The second end of the inductance L1 and the LLC resonance circuit 30 are electrically connected.In the charging stage P1,
The first transistor Q1 and the second transistor Q2 alternate conduction.
The switching circuit 20 and the Boost-Buck conversion circuit 10, the LLC resonance circuit 30 and the control
Circuit 4 processed is electrically connected.The switching circuit 20 establishes the Boost- in the charging stage P1 and the discharge regime P3
Electric connection between Buck conversion circuit 10 and the LLC resonance circuit 30, and the dead zone stage P2 control described in
Boost-Buck conversion circuit 10 disconnects the electric connection between the LLC resonance circuit 30.The switching circuit 20 includes
Switching transistor Q3 and first capacitor C1.The grid of the switching transistor Q3 and the control circuit 4 are electrically connected, described to open
The source electrode and the second input terminal H2 for closing transistor Q3 are electrically connected, and the drain electrode of the switching transistor Q3 passes through described first
The second end of the capacitor C1 and inductance L1 is electrically connected.
Referring to Figure 2 together, the LLC resonance circuit 30 include the first full-bridge conversion circuit 32, resonance circuit 34 and
Second full-bridge conversion circuit 36.The first full-bridge conversion circuit 32 is electrically connected at 10 He of Boost-Buck conversion circuit
Between the resonance circuit 34.The resonance circuit 34 is electrically connected at the first full-bridge conversion circuit 32 and described second entirely
Between bridge conversion circuit 36.The second full-bridge conversion circuit 36 is electrically connected and the resonance circuit 34 and the low-pressure end
Between Load.
In the charging stage P1, the first full-bridge conversion circuit 32 exports the Boost-Buck conversion circuit 10
The first voltage be converted into the first ac square-wave voltage, the resonance circuit 34 is depressured first alternating voltage
And it is converted into the first AC sinusoidal voltage, the second full-bridge conversion circuit 36 converts first AC sinusoidal voltage
It charges afterwards to the low-pressure end Load.
In the dead zone stage P2, the first full-bridge conversion circuit 32 is disconnected and the Boost-Buck conversion circuit 10
Between electric connection so that the Boost-Buck conversion circuit 10 work is in Sofe Switch state, the first full-bridge conversion
Circuit 32 works in zero current and zero-voltage state.
In the output voltage that the discharge regime P3, the second full-bridge conversion circuit 36 provide the low-pressure end Load
The second ac square-wave voltage is converted to, the resonance circuit 34 is converted into after second ac square-wave voltage is boosted
Two AC sinusoidal voltages, after the first full-bridge conversion circuit 32 converts second AC sinusoidal voltage described in output
Second voltage gives the Boost-Buck conversion circuit 10.
The first full-bridge conversion circuit 32 include third transistor Q4, the 4th transistor Q5, the 5th transistor Q6 and
6th transistor Q7.The third transistor Q4, the 4th transistor Q5, the 5th transistor Q6 and the 6th crystalline substance
The grid of body pipe Q7 and the control circuit 4 are electrically connected.The drain electrode of the third transistor Q4 and the 5th transistor Q6
It is electrically connected with the second end of the inductance L1.The first end of the source electrode of the third transistor Q4 and the resonance circuit 34 electricity
Property connection.The source electrode of the 5th transistor Q6 and the second end of the resonance circuit 34 are electrically connected.4th transistor
The source electrode of Q5 and the 6th transistor Q7 and the second input terminal H2 are electrically connected.The drain electrode of the 4th transistor Q5 with
The source electrode of the third transistor Q4 and the first end of the resonance circuit 34 are electrically connected, the drain electrode of the 6th transistor Q7
It is electrically connected with the source electrode of the 5th transistor Q6 and the second end of the resonance circuit 34.
The resonance circuit 34 includes transformer T1.The transformer T1 includes first coil Lp and the second coil Ls.?
It is mutual far from being generated in another one according to mutual inductance when the first coil Lp and the second coil Ls provides electric current on any one
Inducing current.The coil ratio of the first coil Lp and the second coil Ls are k.Wherein, k is the positive integer greater than 1.Institute
Transformer T1 is stated for carrying out the voltage at the both ends the first coil Lp according to the coil ratio k in the charging stage
It is exported by the second coil Ls to the second full-bridge conversion circuit 36 after decompression, and in the discharge regime by described
The voltage at the both ends two coil Ls is exported by the first coil Lp to described after being boosted according to the coil ratio k
One full-bridge conversion circuit 34.The source electrode and the 4th crystal of the first end of the first coil Lp and the third transistor Q4
The drain electrode of pipe Q5 is electrically connected, the source electrode and the 6th crystalline substance of the second end of the first coil Lp and the 5th transistor Q6
The drain electrode of body pipe Q7 is electrically connected, the third end of the second coil Ls and the source electrode and the described 8th of the 7th transistor Q8
The drain electrode of transistor Q9 is electrically connected, the 4th end of the second coil Ls and the source electrode of the 9th transistor Q10 and described
The drain electrode of tenth transistor Q11 is electrically connected.
The second full-bridge conversion circuit 36 includes the 7th transistor Q8, the 8th transistor Q9, the 9th transistor Q10, the
Ten transistor Q11 and the second capacitor C2.The 7th transistor Q8, the 8th transistor Q9, the 9th transistor Q10
And the grid of the tenth transistor Q11 and the control circuit 4 are electrically connected.The 7th transistor Q8 and the described 9th
The drain electrode of transistor Q10 is electrically connected with the positive L+ of the low-pressure end Load.The source electrode of the 7th transistor Q8 with it is described
The third end of resonance circuit 34 is electrically connected.The source electrode of the 9th transistor Q10 and the 4th end electricity of the resonance circuit 34
Property connection.The source electrode of the 8th transistor Q9 and the tenth transistor Q11 and the cathode L- of the low-pressure end Load
It is electrically connected.Drain electrode and the source electrode of the 7th transistor Q8 and the third of the resonance circuit 34 of the 8th transistor Q9
End is electrically connected, the drain electrode of the tenth transistor Q11 and the source electrode of the 9th transistor Q10 and the resonance circuit 34
4th end is electrically connected.The both ends of the second capacitor C2 are electrically connected with the anode L+ and cathode L- respectively.
In the present embodiment, the first transistor Q1, the second transistor Q2, the switching transistor Q3, institute
State third transistor Q4, the 4th transistor Q5, the 5th transistor Q6, the 6th transistor Q7, the 7th crystalline substance
Body pipe Q8, the 8th transistor Q9, the 9th transistor Q10 and the tenth transistor Q11 can be metal oxygen
Compound semiconductor field effect pipe (Metal Oxide Semiconductor, MOS).In other embodiments, described first
Transistor Q1, the second transistor Q2, the switching transistor Q3, the third transistor Q4, the 4th transistor Q5,
The 5th transistor Q6, the 6th transistor Q7, the 7th transistor Q8, the 8th transistor Q9, the described 9th
Transistor Q10 and the tenth transistor Q11 can also be insulated gate bipolar transistor (Insulated Gate
Bipolar Transistor, IGBT), it is fixed to be not limited thereto.
The control circuit 4 is for controlling the first transistor Q1, the second transistor Q2, the switching transistor
Q3, the third transistor Q4, the 4th transistor Q5, the 5th transistor Q6, the 6th transistor Q7, described
Conducting and the pass of seven transistor Q8, the 8th transistor Q9, the 9th transistor Q10 and the tenth transistor Q11
It closes.
Also referring to Fig. 3, the working principle of the bidirectional, dc conversion circuit 1 is as follows:
When any one is connected in the charging stage P1, the first transistor Q1 and the second transistor Q2,
The inductance L1 charges according to the input voltage.Since the first transistor Q1 and second transistor Q2 replaces
Conducting, so that the inductance L1 exports the first voltage after being depressured the input voltage according to electromagnetic induction principle.
The switching transistor Q3 conducting, the first voltage charge to the first capacitor C1.The third transistor Q4 and described
4th transistor Q5 alternate conduction, and the 5th transistor Q6 and the 7th transistor Q7 alternate conduction, according to described
One voltage forms first square-wave voltage between the first end and second end of the first coil Lp.The second coil Ls
Export first AC sinusoidal voltage after first square-wave voltage being depressured according to the coil ratio k.It is described
7th transistor Q8 and the 8th transistor Q9 alternate conduction, the 9th transistor Q10 and the tenth transistor Q11 are handed over
For conducting, will charge after first sinusoidal voltage conversion to the low-pressure end Load.
It is cut in dead zone stage P2, the first transistor Q1, the second transistor Q2 and the switching transistor Q3
Only, the electric connection between the Boost-Buck conversion circuit 10 and the first full-bridge conversion circuit 32 disconnects.Due to not having
There is a circuit, the energy stored on the inductance L1 and the first capacitor C1 can not discharge, therefore the Boost-Buck
Conversion circuit 10 works in Sofe Switch state.The voltage of the first end and second end of the first coil Lp is equal, without electric current
Flowing, i.e. realization no-voltage and zero current condition.At this point, the third transistor Q4, the 4th transistor Q5, the described 5th
Transistor Q6 and the 6th transistor Q7 constitutes full-bridge hard switching circuit, not will form electric current when switching over.
In the discharge regime P3, the 7th transistor Q8 and the 8th transistor Q9 alternate conduction, the described 9th
The low-pressure end Load output voltage provided is supplied to institute by transistor Q10 and the tenth transistor Q11 alternate conduction
State the third end and the 4th end of the second coil Ls.The first coil Lp is according to the coil ratio k by second coil
Formation second square-wave voltage at the third end and the 4th end of Ls.The first coil Lp will according to the coil ratio k
After second square-wave voltage is boosted and be converted to second AC sinusoidal voltage.The third transistor Q4 and described
4th transistor Q5 alternate conduction, and the 5th transistor Q6 and the 7th transistor Q7 alternate conduction are with by described second
AC sinusoidal voltage is converted to the second voltage.The switching transistor Q3 conducting, is supplied to institute for told second voltage
State Boost-Buck conversion circuit 10.The first transistor Q1 and the second transistor Q2 alternate conduction, so that the electricity
First input end H1 and second input terminal H2 of the output to the high-voltage end Vin after sense L1 is boosted the second voltage.
Using above-mentioned bidirectional, dc conversion circuit, in the control LLC work of dead zone stage P2 switching circuit in no-voltage and zero
Current status, it can be achieved that energy conversion efficiency significantly promotion, and reduce electromagnetic interference.
It referring to Figure 4 together, is the circuit diagram of the bidirectional, dc conversion circuit 2 of second embodiment.Institute
State that bidirectional, dc conversion circuit 2 is essentially identical with the bidirectional, dc conversion circuit 1 and working principle is similar, it is no longer superfluous again
It states.In this second embodiment, identical as element name with the same function in first embodiment, it repeats no more.It is described
Bidirectional, dc conversion circuit 2 and the difference of the bidirectional, dc conversion circuit 1 are: the Boost-Buck conversion circuit 10 into
One step includes the first auxiliary transistor Q1a and the second auxiliary transistor Q2a.
The first auxiliary transistor Q1a is for shunting the electric current for flowing through the first transistor Q1.Described
Two auxiliary transistor Q2a are for shunting the electric current for flowing through the second transistor Q2.
The grid of the first auxiliary transistor Q1a and the grid of the first transistor Q1 are electrically connected, and described first
The source electrode of the source electrode of auxiliary transistor Q1a and the first transistor Q1 are electrically connected, the leakage of the first auxiliary transistor Q1a
The drain electrode of pole and the first transistor Q1 are electrically connected.The grid and second crystal of the second auxiliary transistor Q2a
The grid of pipe Q2 is electrically connected, and the source electrode of the source electrode and the second transistor Q2 of the second auxiliary transistor Q2a electrically connects
It connects, the drain electrode of the second auxiliary transistor Q2a is electrically connected with the drain electrode of the second transistor Q2.
Above-mentioned bidirectional, dc conversion circuit 2, the work of the LLC resonance circuit 30 described in dead zone stage P2 is in no-voltage and zero electricity
Stream mode, it can be achieved that energy conversion efficiency significantly promotion, reduce electromagnetic interference.Further, it is converted in Boost-Buck
Increase the first auxiliary transistor Q1a and the second auxiliary transistor Q2a in circuit 10, and brilliant with corresponding described first
Body pipe Q1 and the second transistor Q2 are connected in parallel, the first auxiliary transistor Q1a and the second auxiliary transistor Q2a
The electric current for being provided to the corresponding the first transistor Q1 and the second transistor Q2 is shunted, high current pair can be reduced
The impact of the first transistor Q1 described in the Boost-Buck conversion circuit 10 and the second transistor Q2.
Please refer to fig. 5, its circuit diagram for the bidirectional, dc conversion circuit 3 of third embodiment.Institute
State that bidirectional, dc conversion circuit 3 is essentially identical with the bidirectional, dc conversion circuit 1 and working principle is similar, it is no longer superfluous again
It states.In the third embodiment, identical as element name with the same function in first embodiment, it repeats no more.It is described
Bidirectional, dc conversion circuit 3 and the difference of the bidirectional, dc conversion circuit 1 are: the second full-bridge conversion circuit 36 into one
Step includes third auxiliary transistor Q8a, the 4th auxiliary transistor Q9a, the 5th auxiliary transistor Q10a and the 6th aid crystal
Pipe Q11a.
The third auxiliary transistor Q8a is for shunting the electric current for flowing through the 7th transistor Q8.Described
Four auxiliary transistor Q9a are for shunting the electric current for flowing through the 8th transistor Q9.5th auxiliary transistor
Q10a is for shunting the electric current for flowing through the 9th transistor Q10.The 6th auxiliary transistor Q11a is used for convection current
Electric current through the tenth transistor Q11 is shunted.
The grid of the third auxiliary transistor Q8a and the grid of the 7th transistor Q8 are electrically connected, the third
The source electrode of the source electrode of auxiliary transistor Q8a and the 7th transistor Q8 are electrically connected, the leakage of the third auxiliary transistor Q8a
The drain electrode of pole and the 7th transistor Q8 are electrically connected.The grid and the 8th crystal of the 4th auxiliary transistor Q9a
The grid of pipe Q9 is electrically connected, and the source electrode of the source electrode and the 8th transistor Q9 of the 4th auxiliary transistor Q9a electrically connects
It connects, the drain electrode of the 4th auxiliary transistor Q9a is electrically connected with the drain electrode of the 8th transistor Q9.5th auxiliary is brilliant
The grid of the grid of body pipe Q10a and the 9th transistor Q10 are electrically connected, the source electrode of the 5th auxiliary transistor Q10a
It is electrically connected with the source electrode of the 9th transistor Q10, the drain electrode of the 5th auxiliary transistor Q10a and the 9th crystal
The drain electrode of pipe Q10 is electrically connected.The grid of the 6th auxiliary transistor Q11a and the grid of the tenth transistor Q11 are electrical
Connection, the source electrode of the 6th auxiliary transistor Q11a and the source electrode of the tenth transistor Q11 are electrically connected, and the described 6th is auxiliary
The drain electrode of transistor Q11a and the drain electrode of the tenth transistor Q11 is helped to be electrically connected.
Above-mentioned bidirectional, dc conversion circuit 3, it can be achieved that energy conversion efficiency significantly promotion, reduce electromagnetic interference.Into
One step, each transistor have it is corresponding with auxiliary transistor and be connected in parallel, multiple auxiliary transistors are to being provided to
The electric current of corresponding transistor is shunted, and impact of the high current to high pressure end transistor can be reduced.
It should be noted that, in this document, term " including ", " including " or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Those skilled in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as within spirit of the invention, it is to the above embodiments
Appropriate change and variation are all fallen within the scope of protection of present invention.
Claims (10)
1. a kind of bidirectional, dc conversion circuit, is connected between high-voltage end and low-pressure end；The bidirectional, dc conversion circuit is with pre-
Fixed cycle is repeated in work in charging stage, dead zone stage and discharge regime；The bidirectional, dc conversion circuit includes
Boost-Buck conversion circuit and LLC resonance circuit；In the charging stage, the Boost-Buck conversion circuit is by the height
The input voltage that pressure side provides exports first voltage after being depressured, and the first voltage drops in the LLC resonance circuit
It charges after pressure and conversion to the low-pressure end；In the discharge regime, the low-pressure end electric discharge with provide output voltage to
The LLC resonance circuit, the LLC resonance circuit export second voltage after the output voltage is boosted and converted, institute
Boost-Buck conversion circuit is stated to boost to the second voltage；It is characterized by: the bidirectional, dc conversion circuit packet
Include the first full-bridge conversion circuit, resonance circuit, the second full-bridge conversion circuit and switching circuit；The switching circuit is used in institute
The electric connection between the Boost-Buck conversion circuit and the first full-bridge conversion circuit is disconnected when stating the dead zone stage, and
The Boost-Buck conversion circuit and the first full-bridge conversion circuit are established in the charging stage and the discharge regime
Between electric connection.
2. bidirectional, dc conversion circuit as described in claim 1, it is characterised in that: the switching circuit includes switching transistor
And first capacitor；The grid and control circuit of the switching transistor are electrically connected, and the source electrode of the switching transistor passes through institute
The first input end for stating Boost-Buck conversion circuit and the high-voltage end is electrically connected, and the drain electrode of the switching transistor passes through
Second input terminal of the first capacitor and the high-voltage end is electrically connected.
3. bidirectional, dc conversion circuit as claimed in claim 2, it is characterised in that: the Boost-Buck conversion circuit includes
Inductance, the first transistor and second transistor；The grid of the grid of the first transistor and second transistor difference
It is electrically connected with the control circuit；The first end and the second transistor of the source electrode of the first transistor and the inductance
Drain electrode be electrically connected, drain electrode and the first input end of the high-voltage end of the first transistor are electrically connected；Described second
Second input terminal of the source electrode of transistor and the high-voltage end is electrically connected；The second end of the inductance and LLC resonance electricity
Road and the switching circuit are electrically connected.
4. bidirectional, dc conversion circuit as claimed in claim 3, it is characterised in that: the switching circuit further comprises first
Auxiliary transistor and the second auxiliary transistor；First auxiliary transistor be used for flow through the electric current of the first transistor into
Row shunts；Second auxiliary transistor is for shunting the electric current for flowing through the second transistor.
5. bidirectional, dc conversion circuit as claimed in claim 4, it is characterised in that: the grid of first auxiliary transistor with
The grid of the first transistor is electrically connected, the source electrode of first auxiliary transistor and the source electrode electricity of the first transistor
Property connection, drain electrode and the drain electrode of the first transistor of first auxiliary transistor be electrically connected；Second auxiliary is brilliant
The grid of the grid of body pipe and the second transistor is electrically connected, the source electrode of second auxiliary transistor and second crystalline substance
The source electrode of body pipe is electrically connected, and the drain electrode of second auxiliary transistor is electrically connected with the drain electrode of the second transistor.
6. bidirectional, dc conversion circuit as claimed in claim 2, it is characterised in that: the first full-bridge conversion circuit electrically connects
It is connected between the Boost-Buck conversion circuit and the resonance circuit；It is complete that the resonance circuit is electrically connected at described first
Between bridge conversion circuit and the second full-bridge conversion circuit；The second full-bridge conversion circuit is electrically connected at the resonance electricity
Between road and the low-pressure end；In the charging stage, the first full-bridge conversion circuit converts electricity to the Boost-Buck
The first voltage of road output is converted into the first ac square-wave voltage, and the resonance circuit carries out first alternating voltage
It is depressured and first ac square-wave voltage is converted into the first AC sinusoidal voltage, the second full-bridge conversion circuit will be described
First AC sinusoidal voltage charges to the low-pressure end after being converted.
7. bidirectional, dc conversion circuit as claimed in claim 6, it is characterised in that: complete in the discharge regime, described second
The output voltage that the low-pressure end provides is converted to the second ac square-wave voltage by bridge conversion circuit, and the resonance circuit will be described
After second ac square-wave voltage is boosted and it is converted into the second AC sinusoidal voltage, the first full-bridge conversion circuit is to described
Second AC sinusoidal voltage exports the second voltage to the Boost-Buck conversion circuit after being converted.
8. bidirectional, dc conversion circuit as claimed in claim 6, it is characterised in that: the second full-bridge conversion circuit includes the
Seven transistors, the 8th transistor, the 9th transistor, the tenth transistor and the second capacitor；7th transistor, the described 8th
The grid of transistor, the 9th transistor and the tenth transistor and the control circuit are electrically connected；Described 7th
The drain electrode of transistor and the 9th transistor is electrically connected with the anode of the low-pressure end；The source electrode of 7th transistor with
The third end of the resonance circuit is electrically connected；4th end of the source electrode and the resonance circuit of the 9th transistor electrically connects
It connects；The cathode of the source electrode of 8th transistor and the tenth transistor and the low-pressure end is electrically connected；Described 8th is brilliant
The drain electrode of the source electrode of body pipe and the 7th transistor and the third end of the resonance circuit are electrically connected, the tenth transistor
Drain electrode be electrically connected with the 4th end of the source electrode of the 9th transistor and the resonance circuit；The both ends of second capacitor
The cathode with the anode of the low-pressure end and the low-pressure end is electrically connected respectively.
9. bidirectional, dc conversion circuit as claimed in claim 8, it is characterised in that: the second full-bridge conversion circuit is further
Including third auxiliary transistor, the 4th auxiliary transistor, the 5th auxiliary transistor and the 6th auxiliary transistor；The third is auxiliary
Crystallization in motion body pipe is for shunting the electric current for flowing through the 7th transistor；4th auxiliary transistor is used for flowing through
The electric current for stating the 8th transistor is shunted；5th auxiliary transistor be used for flow through the electric current of the 9th transistor into
Row shunts；6th auxiliary transistor is for shunting the electric current for flowing through the tenth transistor.
10. bidirectional, dc conversion circuit as claimed in claim 9, it is characterised in that: the grid of the third auxiliary transistor
It is electrically connected with the grid of the 7th transistor, the source electrode of the source electrode of the third auxiliary transistor and the 7th transistor
It is electrically connected, the drain electrode of the third auxiliary transistor is electrically connected with the drain electrode of the 7th transistor, the 4th auxiliary
The grid of the grid of transistor and the 8th transistor is electrically connected, the source electrode and the described 8th of the 4th auxiliary transistor
The source electrode of transistor is electrically connected, and the drain electrode of the 4th auxiliary transistor is electrically connected with the drain electrode of the 8th transistor,
The grid of 5th auxiliary transistor and the grid of the 9th transistor are electrically connected, the source of the 5th auxiliary transistor
The source electrode of pole and the 9th transistor is electrically connected, the drain electrode and the leakage of the 9th transistor of the 5th auxiliary transistor
Pole is electrically connected, and the grid of the 6th auxiliary transistor and the grid of the tenth transistor are electrically connected, and the described 6th is auxiliary
The source electrode of the source electrode and the tenth transistor that help transistor is electrically connected, the drain electrode of the 6th auxiliary transistor and described the
The drain electrode of ten transistors is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581127.1A CN109494991A (en) | 2018-12-24 | 2018-12-24 | Bidirectional, dc conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581127.1A CN109494991A (en) | 2018-12-24 | 2018-12-24 | Bidirectional, dc conversion circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109494991A true CN109494991A (en) | 2019-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811581127.1A Pending CN109494991A (en) | 2018-12-24 | 2018-12-24 | Bidirectional, dc conversion circuit |
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| Country | Link |
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| CN (1) | CN109494991A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206506451U (en) * | 2017-03-09 | 2017-09-19 | 中国计量大学 | A kind of circuit of synchronous rectification suitable for full-wave rectification |
| CN207460002U (en) * | 2017-11-10 | 2018-06-05 | 哈尔滨理工大学 | A kind of cascade two-stage type DC converter of wide input range |
| CN209250496U (en) * | 2018-12-24 | 2019-08-13 | 深圳市京泉华科技股份有限公司 | Bidirectional, dc conversion circuit |
-
2018
- 2018-12-24 CN CN201811581127.1A patent/CN109494991A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206506451U (en) * | 2017-03-09 | 2017-09-19 | 中国计量大学 | A kind of circuit of synchronous rectification suitable for full-wave rectification |
| CN207460002U (en) * | 2017-11-10 | 2018-06-05 | 哈尔滨理工大学 | A kind of cascade two-stage type DC converter of wide input range |
| CN209250496U (en) * | 2018-12-24 | 2019-08-13 | 深圳市京泉华科技股份有限公司 | Bidirectional, dc conversion circuit |
Non-Patent Citations (1)
| Title |
|---|
| 庞云亭: "级联双向变换器在多能源变流器中的应用", 《电力建设》, pages 2 - 3 * |
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