CN110212778A - A kind of non-contact single tube controlled resonant converter - Google Patents
A kind of non-contact single tube controlled resonant converter Download PDFInfo
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- CN110212778A CN110212778A CN201910575234.1A CN201910575234A CN110212778A CN 110212778 A CN110212778 A CN 110212778A CN 201910575234 A CN201910575234 A CN 201910575234A CN 110212778 A CN110212778 A CN 110212778A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of non-contact single tube controlled resonant converters, including primary and secondary side；Wherein: primary side includes resonance inversion module；Resonance inversion module includes primary side inductance, switching tube, is connected in parallel on input voltage both ends after the primary side inductance and switching tube series connection, further includes distinguishing parallel resonance capacitor on the primary side inductance and/or switching tube；Secondary side includes sequentially connected secondary inductance, high-order compensation network, rectification module.The present invention proposes that the different parallel method of primary side resonant capacitance and secondary side use high-order compensation network, cooperate reasonable parameter designing, quasi- constant current output not only may be implemented, good closed loop control characteristic is provided for wireless charging, and realize the soft open-minded of switching tube, switch tube voltage stress and current stress are reduced, parameter designing freedom degree is increased；Controllable rectifier bridge structure can be used in secondary side rectifier bridge, and under the control method provided, adjustment recetifier bridge load is purely resistive, to improve the power delivery capabilities for proposing topology.
Description
Technical field
The present invention relates to a kind of non-contact single tube controlled resonant converters, belong to the technical field of wireless charging.
Background technique
Wireless energy transmission technology (WPT, Wireless Power Transmission) have been applied to electric car,
The fields such as automated guided vehicle (AGV, Automated Guided Vehicle), unmanned plane, automatic Pilot, especially need
Automatic charging and the occasion that can not manually charge.Power relative to contact, wireless power have safety, flexibly, it is no-spark, few
Maintenance, the removable and advantages such as easy to automate.
WPT mainly passes through inductively energy transmission (ICPT, Inductively Coupled Power
Transmission), electromagnetic coupling Resonant energy transfer (ERPT, Electro-magnetic Resonant Power
Transmission), RF energy transmits (RFPT, Radio Frequency Power Transmission), microwave energy
Transmit (MPT, Microwave Power Transmission), Laser energy transmission (LPT, Laser Power
) etc. Transmission modes realize contactless energy transmission.Wherein, ICPT is most widely used WPT mode.
Inversion is one of essential link of ICPT, and the most commonly used inversion topological is multipipe structure.But in
For small-power occasion, multitube inversion is due to higher cost, and driving is complicated and cost performance is not high, therefore low cost, driving are simply
Single-tube contravariant become medium and small power occasions more preferably selecting.The particularity of single-tube contravariant is to realize by resonant process
The conversion of DC/AC, therefore its switch tube voltage stress is higher, analysis is more difficult.
Existing research shows that contactless single-tube circuit has Class-E and two kinds of resonance inverse-excitation type, wherein Class-E
The application value very little due to switch tube voltage stress more than 4 times of input voltages.Existing contactless resonance circuit of reversed excitation
(hereinafter referred to as contactless single tube controlled resonant converter) there are two kinds of compensation ways of series compensation and shunt compensation on secondary side.Series connection is mended
Repaying does not have parameter designing freedom degree with shunt compensation, this is not inconsistent with practical application request；Shunt compensation is rolled in the secondary side of capacitive
Closing impedance makes switch tube voltage stress and current stress larger, and wherein voltage stress is 3 times of input voltages or more.Commercialization
The busbar voltage of PFC module is usually 400V or so, and voltage stress more than 3 times of input voltages greatly reduces switching tube type selecting
Range.Therefore in order to improve the application value of contactless single-tube circuit, need to realize good output characteristics, appropriate reduce is opened
Tube voltage stress and current stress are closed, parameter designing freedom degree is increased.
Summary of the invention
Goal of the invention: being directed to the above-mentioned prior art, propose a kind of non-contact single tube controlled resonant converter, and it is quasi- permanent to realize output
Properties of flow improves switch tube voltage stress, increases parameter designing freedom degree, solves and has non-contact single-tube circuit because defeated
Characteristic is poor out, high switching tube stress and lacks parameter designing freedom degree and the not high problem of application value.
Technical solution: a kind of non-contact single tube controlled resonant converter, including primary and secondary side；Wherein: the primary side includes humorous
Shake inverter module；The resonance inversion module includes primary inductor Lp, switching tube S, the primary inductor LpIt connects with switching tube S
After be connected in parallel on input voltage VinBoth ends further include in the primary inductor LpAnd/or parallel resonance capacitor is distinguished on switching tube S；
The pair side includes sequentially connected secondary inductance Ls, high-order compensation network, rectification module.
Further, the resonant capacitance meets following requirement, so that the switching tube S in the resonance inversion module is lightly loaded
Lower realization no-voltage is open-minded, and heavy duty is lower while realizing no-voltage and zero current turning-on；
When the primary inductor LpWith on switching tube S distinguish parallel resonance capacitor Cr1With resonant capacitance Cr2When:
When the primary inductor LpOr on switching tube S and resonant capacitance CrWhen:
In formula, ReFor secondary side transformed resistance, △ t is the switching tube S turn-off time in primary side resonance inversion module, and W is original
Resonant capacitance and primary inductor L when switching tube S in the resonance inversion module of side is turned offpThe sum of energy of storage.
Further, the high-order compensation network is by compensating electric capacity C1, compensating electric capacity C2, resonant inductance L2Composition, the pair
Side inductance LsWith compensating electric capacity C1After series connection, then with compensating electric capacity C2Be connected in parallel, then with resonant inductance L2Series connection connects
It connects；The high-order compensation network parameter meets following requirement, so that the non-contact single tube controlled resonant converter has quasi- constant current defeated
Characteristic out:
In formula, w is the switch angular frequency of the switching tube S.
Further, the high-order compensation network is by compensating electric capacity C and resonant inductance L2Composition, the secondary inductance LsWith
After compensating electric capacity C is connected in parallel, then with resonant inductance L2It is connected in series；The high-order compensation network parameter need to meet to be wanted as follows
It asks, so that the non-contact single tube controlled resonant converter has quasi- constant current output characteristic:
In formula, w is the switch angular frequency of the switching tube S.
Further, the rectification module includes rectifier and filter, and the rectifier is full-bridge rectification or flows again whole
Stream or voltage multiplying rectifier, the filter are that LC is filtered or C is filtered.
Further, the rectifier is controllable rectifier bridge, and two bridge arms are gone here and there by a diode and a MOSFET
Connection connection composition, wherein MOSFET is down tube, the controlling feature amount D of the MOSFETctrMeet following formula, adjusts recetifier bridge load
Equivalent impedance be purely resistive；
Wherein, RLFor load resistance.
Further, the resonant capacitance in the resonance inversion module, the compensating electric capacity in the high-order compensation network, institute
The filter capacitor stated in rectification module is made of multiple capacitors of series connection and/or parallel connection；It is humorous in the high-order compensation network
Filter inductance in vibration inductance, the rectification module is made of multiple inductance of series connection and/or parallel connection.
The utility model has the advantages that the present invention has the advantages that compared with prior art
(1) it the invention discloses a kind of novel non-contact single tube controlled resonant converter, is mended by primary side resonant capacitance and high-order
The parameter designing of network is repaid, the switching tube in primary side inverter module can realize that no-voltage is open-minded under underloading, and heavy duty is lower while real
Existing no-voltage and zero current turning-on, and quasi- constant-current characteristics is presented in the primary side inductive current of the converter, it is special that quasi- constant current is presented in output
Property；
(2) it is resistive or resistance sense that the present invention, which adjusts secondary side reduced impedance property using high-order compensation network, reduces original
Switch tube voltage stress and current stress in the inverter module of side；
(3) present invention increases parameter designing freedom degree using high-order compensation network, switchs in guaranteeing primary side inverter module
In the case where managing soft open, it can design and adapt to different output-indexes, and serial or parallel connection compensation does not have designed capacity；
(4) present invention is purely resistive using the adjustable recetifier bridge load equivalent impedance property of controllable rectifier bridge, is improved
The power delivery capabilities of the novel non-contact single tube controlled resonant converter；
(5) novel non-contact single tube controlled resonant converter disclosed by the invention has circuit and driving simple, reliable operation, at
This low advantage.
Detailed description of the invention
Fig. 1 is that the secondary side of the non-contact single tube controlled resonant converter of the present invention is folded to the equivalent circuit of primary side；
Fig. 2 is the work wave schematic diagram of the primary circuit of the non-contact single tube controlled resonant converter of the present invention；
Fig. 3 is the fundamental wave exploded view of resonant capacitance both end voltage；
Fig. 4 is the conventional transducers structural schematic diagram of secondary side shunt compensation；
Fig. 5 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 6 is the simulation waveform of the embodiment of the present invention one；
Fig. 7 is the output characteristics simulation result of the embodiment of the present invention one；
The switch tube voltage stress comparing result of Fig. 8 embodiment of the present invention one and secondary side shunt compensation structure；
Fig. 9 is the switching tube current stress comparing result of the embodiment of the present invention one and secondary side shunt compensation structure；
Figure 10 is the structural schematic diagram of the embodiment of the present invention two；
Figure 11 is the structural schematic diagram of the embodiment of the present invention three；
Figure 12 is the input side voltage and current analogous diagram that rectification module of the present invention is uncontrollable rectifier bridge；
Figure 13 is the schematic diagram of rectification module control logic in the embodiment of the present invention two；
Figure 14 is the analogous diagram of the embodiment of the present invention two；
Figure 15 is the structural schematic diagram of the embodiment of the present invention four；
Figure 16 is the structural schematic diagram of the embodiment of the present invention five；
In figure: VinSupply voltage, S- switching tube, Cds1~Cds3Parasitic capacitance, D01~D03Body diode, LpIt is non-to connect
Touch transformer primary side inductance, LsNon-contact transformer secondary inductance, the mutual inductance of M- primary side inductance and secondary inductance, Cr1、Cr2、Cr-
Primary side resonant capacitance, iLNon-contact transformer primary side inductive current, ucResonant capacitor voltage, usSwitching tube drain-source interpolar electricity
Pressure, ReSecondary side transformed resistance, C, C1、C2Compensating electric capacity in the high-order compensation network of secondary side, L2In the high-order compensation network of secondary side
Resonant inductance, D1~D4Rectifier diode, S3、S4Controlled rectifier, CoFilter capacitor, RLLoad, VoOutput voltage,
vrecVoltage before rectifier bridge, irecRectifier bridge input current, uac, primary side resonant capacitance fundamental voltage, iacNon-contact transformer
Primary side inductive current fundamental current, VgsThe driving signal of switching tube S, IoExport electric current, VsThe voltage stress of switching tube S, Is-
The current stress of switching tube S, vS3-S3Source and drain voltage across poles, vS4-S4Source and drain voltage across poles.
Specific embodiment
Further explanation is done to the present invention with reference to the accompanying drawing.
The novel non-contact single tube controlled resonant converter of one kind of the invention adjusts secondary side reduced impedance using high-order compensation network
Property realizes the soft open-minded of switching tube under the Parameters design provided, and primary coil electric current has quasi- constant-current characteristics,
The quasi- constant-current characteristics of output is realized, switch tube voltage stress is improved, increases parameter designing freedom degree, solve and have non-connect
Single-tube circuit is touched because output characteristics is poor, high switching tube stress and application value not high problem due to shortage parameter designing freedom degree.
Fig. 1 (a) show the equivalent circuit of the novel non-contact single tube controlled resonant converter of the present invention, and secondary side reduced impedance is temporary
It is approximately pure resistance Re, Fig. 2 show the circuit waveform schematic diagram on the basis of equivalent circuit.At the t0 moment, S is in the conductive state, non-
Contact transformer primary side inductance LpRelease energy end, primary side inductive current iLTo zero；During t0~t1, primary inductor LpStorage
Energy, iLIncrease；T1 moment, S shutdown, primary side resonant capacitance CrBeginning and LpCarry out resonance；T2 moment, iLResonance is to zero, Cr's
Backward voltage is maximum, the drain-source voltage u of SsIt is maximum；During t2~t3, CrIt charges；T3 moment, ucEqual to Vin, the body two of S
Pole pipe D01Conducting, meanwhile, S is open-minded, realizes ZVS；During t3~t4, LpIt releases energy to power supply.
Embodiment one
Fig. 5 is the schematic structural diagram of the first embodiment of the non-contact single tube controlled resonant converter of the present invention.As shown in figure 5, LpWith Cr
After being connected in parallel, one end is connected with positive pole, and the other end is connected with the drain electrode of S, and the source electrode of S is connected with power cathode, LsWith C1
After series connection, then with C2Be connected in parallel, then with L2It is connected in series, is finally coupled to two bridge arm midpoints of uncontrollable rectifier bridge,
CoWith RLAfter being connected in parallel, then it is connected in parallel on the output terminal of uncontrollable rectifier bridge.
Formula (1) gives the time-differential expression formula of resonant process during S is turned off:
I during calculating S shutdown can be derived by formula (1)LAnd ucTime-domain expression, as shown in formula (2), whereinI0=iL(t1), wrIt is humorous during switching tube S shutdown
Shake angular frequency,For the angle of phase displacement of primary side inductive current, I0For t1 moment primary side inductive current.As it can be seen that during S shutdown,For the circuit energy rate of decay of t moment.
Therefore, S realizes that the condition of ZVS is as shown in formula (3), wherein t1 moment CrAnd LpStored gross energy
T1 moment, primary side inductive current can be calculated by formula (4):
As shown in Figure 2, at the t2 moment, work as iLWhen resonance is to 0, switching tube S both end voltage highest,TrFor switch
Harmonic period during pipe S shutdown.At this point, the energy in resonant element is transferred to CrOn, as shown in formula (5):
The voltage stress that switching tube S can be solved by formula (5), as shown in formula (6), T is the switch periods of S, TrThe phase is turned off for S
Between Lp、CrAnd ReHarmonic period.
The voltage stress of switch tube S carries out Tavlor series expansion and certain approximation, as shown in formula (7):
Fig. 3 is shown to CrBoth end voltage carries out fundamental wave decomposition, it is seen then that fundamental voltage amplitude UacAbout CrBoth end voltage peak
The half of peak value, the as half of the voltage stress of switching tube S, i.e.,Therefore CrBoth ends fundamental voltage has quasi- constant pressure special
Property.Fig. 1 (b) show the AC equivalent circuit of the non-contact single tube controlled resonant converter of type of the present invention, former non-contact transformer primary side electricity
Shown in inducing current fundamental current such as formula (8), IacFor non-contact transformer primary side inductive current fundamental current amplitude, w is the switch of S
Angular frequency.
As it can be seen that the primary coil fundamental current of the non-contact single tube controlled resonant converter has the characteristic of quasi- constant current.
The non-contact single tube controlled resonant converter of the present embodiment need to be designed according to following design cycle:
The first step gives Po, Vin, Lp, f, Re, wherein PoFor output power, f is the switching frequency of S；
Second step solves C by formula (3)rRange；
Third step when taking equal sign in second step, can calculate I by formula (6), formula (8)ac；
4th step, present output powerIf Po' be unsatisfactory for demanded power output, then adjust Re, turn second
Step；
5th step calculates switch tube voltage stress by formula (6) and adjusts R if being unsatisfactory for requiringe, turn second step；
6th step, by Re=Re (Zeq), carry out the design of high-order compensation network parameter, wherein ZeqFor secondary side reduced impedance.
High-order compensation network preferred parameter relationship:It is clearly, there are a parameter designing freedom
Degree.Under the premise of recetifier bridge load is purely resistive, secondary side reduced impedanceFor purely resistive, relatively secondary side parallel connection
For compensation, switching tube S voltage stress and current stress are relatively small.
Under above-mentioned parameter design conditions, the output current expression such as formula (9) of novel non-contact single tube controlled resonant converter
It is shown, convolution (8), it can be seen that the converter, which has, exports quasi- constant-current characteristics.
According to the above parameter designing process, the novel non-contact single tube that one group of pair side uses high-order compensation network is given below
The saber simulation parameter of controlled resonant converter: Vin=400V, f=40kHz, Lp=95.9 μ H, Cr=106.4nF, Ls=97.8 μ H,
M=29 μ H, C1=378.7nF, C2=282.7nF, L2=56 μ H, Co=650 μ F.
If non-contact single tube controlled resonant converter pair side uses shunt compensation, as shown in figure 4, compensating electric capacity and non-contact transformation
Device secondary inductance meets relationshipWherein CpFor secondary side Shunt compensation capacitor.Recetifier bridge load fundamental wave is equivalent to pure resistance,
Then shown in secondary side reduced impedance such as formula (10):
Obviously it is capacitive, therefore can be seen that from switch tube voltage stress expression formula, VsIncrease, IacIncrease, correspondingly, switch
Tube current stress increases.One group sabe simulation parameter of the secondary side using shunt compensation when: V is given belowin=400V, f=
40kHz, Lp=95.9 μ H, Cr=106.4nF, Ls=97.8 μ H, M=29 μ H, Cp=161nF, Co=650 μ F.
Fig. 6, which is shown, uses the novel non-contact single tube controlled resonant converter parameter designing of high-order compensation network on above-mentioned secondary side
Under, S realizes the simulation waveform of no-voltage and zero current turning-on simultaneously；Fig. 7 show output electric current VS load resistance, is rendered as defeated
Quasi- constant-current characteristics out.Fig. 8, Fig. 9 are shown under above-mentioned two groups of parameters, the comparison of switch tube voltage stress and current stress, it is clear that
Secondary side possesses lower switch tube voltage stress and current stress relative to shunt compensation using high-order compensation network.
Embodiment two
Figure 10 show the schematic structural diagram of the second embodiment of the novel non-contact single tube controlled resonant converter of the present invention.Primary side electricity
Line structure is the same as example 1, LsAfter being connected in parallel with C, it is connected to two bridge arm midpoints of uncontrollable rectifier bridge, CoWith RLIt is in parallel
After connection, then it is connected in parallel on the output terminal of uncontrollable rectifier bridge.
The design and implementation example one of primary side resonant capacitance is identical, the preferred parameter relationship of higher order resonances networkObviously do not have parameter designing freedom degree, but adjustable L at this time2, make the work of higher order resonances network in detuning shape
State, to meet output-index.
Embodiment three
Figure 11 show the 3rd embodiment structural schematic diagram of the novel non-contact single tube controlled resonant converter of the present invention.Such as Figure 11
Shown, resonance inversion module and higher order compensation blocks are identical as one structure of embodiment, and parameter designing process is the same as example 1,
Rectification module is controllable rectifier bridge, and two bridge arms are made of a diode and a MOSFET series connection, wherein
MOSFET is down tube, CoWith RLAfter being connected in parallel, then it is connected in parallel on the output terminal of controllable rectifier bridge.Uncontrollable rectifier bridge load equivalent
Impedance is hereinbefore approximately purely resistive, but since higher harmonic current influences, equivalent impedance is resistance sense, and Figure 12 is shown
The input side voltage and current waveform of uncontrollable rectifier bridge, it is clear that fundamental current lags behind fundamental voltage.Ignore the parasitism in circuit
Parameter, formula (11) provide recetifier bridge load equivalent impedance expression formula and power delivery capabilities expression formula:
In formula, ZrecFor recetifier bridge load equivalent impedance, PcapFor the novel non-contact single tube resonant transformation under uncontrollable rectifier
The power delivery capabilities of device, θ are recetifier bridge load equivalent impedance angle.The present embodiment is adjusted by the on-off of control rectifier bridge bridge arm
The phase relation of rectifier bridge input side fundamental voltage and fundamental current is saved, so that reaching adjustment rectifier bridge equivalent impedance is purely resistive
Purpose.Figure 13 show the control logic of controllable rectifier bridge, works as irecWhen by just becoming negative, S3Body diode D02Conducting, one section
S is turned off after time4, in D02S is opened during conducting3；Work as irecBecome timing, S by negative4Body diode D03Conducting, after a period of time
Turn off S3, in D03S is opened during conducting4；Enable D02Turn-on instant is initial time ta, S4The shutdown moment is tbOr D03Turn-on instant
For initial time ta, S3The shutdown moment is tb, define Dctr=1-2 (tb-ta)/T, then work as DctrWhen meeting formula (12), it can will rectify
Bridge load equivalent impedance adjustment is purely resistive, and as shown in figure 14, i.e. the perception of θ=1 cos, secondary side reduced impedance disappears, according to upper
I in textacExpression formula formula (8) it is found that I at this timeacAlso increased.Therefore, convolution (11) is it is found that using controllable rectifier bridge
The power delivery capabilities of the non-contact single tube controlled resonant converter can be improved.
Example IV
Figure 15 is the fourth embodiment structural schematic diagram of the novel non-contact single tube controlled resonant converter of the present invention.Such as Figure 15 institute
Show, LpWith Cr1After being connected in parallel, one end is connected with positive pole, and the other end is connected with the drain electrode of S, the source electrode and power cathode of S
It is connected, Cr2It is connected in parallel on the both ends S, LsWith C1After series connection, then with C2Be connected in parallel, then with L2It is connected in series, is finally coupled to
Two bridge arm midpoints of uncontrollable rectifier bridge, CoWith RLAfter being connected in parallel, then it is connected in parallel on the output terminal of uncontrollable rectifier bridge.This implementation
The Parameters design of example is the same as example 1, wherein Cr=Cr1+Cr2, Cr1And Cr2Size relation can be with arbitrary disposition.
Embodiment five
Figure 16 is the fourth embodiment structural schematic diagram of the novel non-contact single tube controlled resonant converter of the present invention.Such as Figure 16 institute
Show, LpOne end is connected with positive pole, and the other end is connected with the drain electrode of S, and the source electrode of S is connected with power cathode, Cr2It is connected in parallel on S two
End, LsWith C1After series connection, then with C2Be connected in parallel, then with L2It is connected in series, is finally coupled to two of uncontrollable rectifier bridge
Bridge arm midpoint, CoWith RLAfter being connected in parallel, then it is connected in parallel on the output terminal of uncontrollable rectifier bridge.The Parameters design of the present embodiment
It is the same as example 1, wherein Cr=Cr2。
The present invention proposes that secondary side uses high-order compensation network, cooperates reasonable parameter designing, quasi- constant current not only may be implemented
Output, provides good closed loop control characteristic for wireless charging, and realize the soft open-minded of switching tube, reduces switching tube
Voltage stress and current stress increase parameter designing freedom degree, are suitable for different output-indexes.The present invention also proposes that secondary side is adopted
With controllable rectifier bridge, recetifier bridge load property is adjusted, the power delivery capabilities of novel non-contact single tube controlled resonant converter are improved,
Substantially increase the application value of non-contact single-tube circuit.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of non-contact single tube controlled resonant converter, it is characterised in that: including primary and secondary side；Wherein: the primary side includes humorous
Shake inverter module；The resonance inversion module includes primary inductor Lp, switching tube S, the primary inductor LpIt connects with switching tube S
After be connected in parallel on input voltage VinBoth ends further include in the primary inductor LpAnd/or parallel resonance capacitor is distinguished on switching tube S；
The pair side includes sequentially connected secondary inductance Ls, high-order compensation network, rectification module.
2. non-contact single tube controlled resonant converter according to claim 1, it is characterised in that: the resonant capacitance meets as follows
It is required that switching tube S underloading is lower to realize zero electricity so that the primary side inductive current in the resonance inversion module has quasi- constant-current characteristics
Press off logical, heavy duty is lower while realizing no-voltage and zero current turning-on；
When the primary inductor LpWith on switching tube S distinguish parallel resonance capacitor Cr1With resonant capacitance Cr2When:
When the primary inductor LpOr on switching tube S and resonant capacitance CrWhen:
In formula, ReFor secondary side transformed resistance,△T is the switching tube S turn-off time in primary side resonance inversion module, and W is primary side resonance
Resonant capacitance and primary inductor L when switching tube S in inverter module is turned offpThe sum of energy of storage.
3. non-contact single tube controlled resonant converter according to claim 1 or 2, it is characterised in that: the high-order compensation network
By compensating electric capacity C1, compensating electric capacity C2, resonant inductance L2Composition, the secondary inductance LsWith compensating electric capacity C1After series connection, then
With compensating electric capacity C2Be connected in parallel, then with resonant inductance L2It is connected in series；The high-order compensation network parameter satisfaction is wanted as follows
It asks, so that the non-contact single tube controlled resonant converter has quasi- constant current output characteristic:
In formula, w is the switch angular frequency of the switching tube S.
4. non-contact single tube controlled resonant converter according to claim 1 or 2, it is characterised in that: the high-order compensation network
By compensating electric capacity C and resonant inductance L2Composition, the secondary inductance LsAfter being connected in parallel with compensating electric capacity C, then with resonant inductance L2
It is connected in series；The high-order compensation network parameter need to meet following requirement, so that the non-contact single tube controlled resonant converter has
Quasi- constant current output characteristic:
In formula, w is the switch angular frequency of the switching tube S.
5. non-contact single tube controlled resonant converter according to claim 1 or 2, it is characterised in that: the rectification module includes
Rectifier and filter, the rectifier is full-bridge rectification or stream rectification or voltage multiplying rectifier, the filter are LC filtering or C again
Filtering.
6. non-contact single tube controlled resonant converter according to claim 5, which is characterized in that the rectifier is controlled rectification
Bridge, two bridge arms are made of a diode and a MOSFET series connection, and wherein MOSFET is down tube, the MOSFET
Controlling feature amount DctrMeet following formula, the equivalent impedance for adjusting recetifier bridge load is purely resistive；
Wherein, RLFor load resistance.
7. non-contact single tube controlled resonant converter according to claim 3, it is characterised in that: in the resonance inversion module
Resonant capacitance, the compensating electric capacity in the high-order compensation network, the filter capacitor in the rectification module be by series connection and/or simultaneously
Multiple capacitors composition of connection；The filter inductance in resonant inductance, the rectification module in the high-order compensation network is by going here and there
Connection and/or multiple inductance of parallel connection composition.
8. non-contact single tube controlled resonant converter according to claim 4, it is characterised in that: in the resonance inversion module
Resonant capacitance, the compensating electric capacity in the high-order compensation network, the filter capacitor in the rectification module be by series connection and/or simultaneously
Multiple capacitors composition of connection；The filter inductance in resonant inductance, the rectification module in the high-order compensation network is by going here and there
Connection and/or multiple inductance of parallel connection composition.
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| CN112202252A (en) * | 2020-12-04 | 2021-01-08 | 南京航空航天大学 | Non-contact single-tube resonant converter with primary impedance conversion network |
| CN114785156A (en) * | 2022-06-13 | 2022-07-22 | 南京航空航天大学 | Single-tube resonant converter with low voltage stress |
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