CN112202252A - Non-contact single-tube resonant converter with primary impedance conversion network - Google Patents
Non-contact single-tube resonant converter with primary impedance conversion network Download PDFInfo
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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
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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
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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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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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
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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
Abstract
The invention discloses a non-contact single-tube resonant converter with a primary impedance conversion network, which comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube; the secondary side unit comprises a receiving coil, a compensation unit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02. The invention adds the primary impedance transformation network to ensure that the power transmitted by the two energy couplers has the characteristics of opposite increase and decrease along with the change of dislocation and air gap, thereby inhibitingThe output voltage/current fluctuation of the non-contact single-tube resonant converter is made.
Description
Technical Field
The invention relates to a non-contact single-tube resonant converter with a primary impedance transformation network, and belongs to the technical field of wireless charging.
Background
The wireless charging has the advantages of safety and convenience in use, no spark or electric shock hazard, no maintenance, adaptability to severe environments, easiness in realizing unmanned automatic power supply and the like, and has outstanding application advantages in special application occasions such as mines, oil fields, underwater detection and the like, implanted medical equipment, portable electronic equipment, electric automobiles, robots and other mobile equipment. And the non-contact single-tube resonant converter only uses one switching tube, so that the circuit is simplified, the hardware cost is greatly reduced, and the non-contact single-tube resonant converter has a good application prospect.
The actual working condition of wireless charging can not avoid the relative displacement or air gap change of the primary side and the secondary side of the energy coupler, and the performances of voltage/current gain, efficiency and the like of the converter can be seriously deteriorated, so that the requirements of high anti-offset capability and capability of adapting to air gap change are provided for the wireless charging main power topology.
A bilateral S-LCC Hybrid Converter with High anti-offset characteristic is provided in G, Ke, Q, Chen, L, Xu, X, Ren and Z, Zhang, "Analysis and Optimization of a Double-sized S-LCC Hybrid Converter for High simulation Torque," in IEEE Transactions on Industrial Electronics, doi: 10.1109/TIE.2020.2988215.kh of Nanjing aerospace university, and the fluctuation of the output current gain of the Converter under the condition of energy coupler dislocation is inhibited by utilizing an orthogonal Double DD coil structure and the arrangement of an original secondary compensation network. However, since the non-contact single-tube resonant converter only has one switching tube and realizes the inversion function by depending on the resonant process, the soft switching of the switching tube of the non-contact single-tube resonant converter seriously depends on the resonant network parameters, and a compensation network cannot be arbitrarily arranged in a primary circuit. If the scheme provided by Nanjing aerospace university is put in a non-contact single-tube resonant converter, the soft switching condition of a switching tube can be damaged, and the circuit cannot work normally.
The inductive coupling power transmission device with the pull-down auxiliary switch is used in the university of Qingdao, Wangchunfang, Weizhihao and Lizhuang, and has the following disclosure: CN107134927A, published: 2017-09-05, which is a research on a non-contact single-tube resonant converter, a primary side is only connected with a resonant capacitor in parallel at two ends of a transmitting coil, a secondary side adopts series or parallel compensation, output power is limited by voltage stress of a high-switching tube, and output voltage/current gain is closely related to the relative position of an original secondary side coil.
At present, no practical and effective scheme for improving the anti-offset capability and the capability of adapting to air gap change of the non-contact single-tube resonant converter exists.
Disclosure of Invention
The invention provides a non-contact single-tube resonant converter with a primary side impedance conversion network, aiming at the problems of the non-contact single-tube resonant converter in the aspects of anti-offset capability and adaptation to air gap change, and the non-contact single-tube resonant converter is used for effectively reducing the output voltage/current gain fluctuation of the converter under the conditions of energy coupler dislocation and air gap change.
The specific technical scheme of the invention is as follows:
a non-contact single-tube resonant converter with a primary impedance transformation network comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube; the secondary side unit comprises a receiving coil, a compensation unit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02;
the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r Said second resonant capacitorC r2First and second transmitting coilsL p2Series connected, rear and resonant inductorsL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Is connected with the primary impedance transformation network in series and then is connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube, and finally connected in parallel to the input power supplyV in Two ends;
the first receiving coilL s1A second receiving coil connected with the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected with the output of the second compensation unit Z02 in series or in parallel and then is sequentially connected with a load resistor;
the first radiation coilL p1With only the first receiving coilL s1Coupled, second transmitting coilL p2With only the second receiving coilL s2Coupling to form two energy couplers; when the converter has dislocation and variable air gap working conditions, the output voltage/current gain fluctuation of the converter is reduced by utilizing the characteristic that the power transmitted by the two energy couplers is increased or decreased in an opposite way; wherein the parameter conditions of the primary impedance transformation network are as follows, whereinfFor the switching frequency:
。
further, the primary side unit is provided with a third resonant capacitorC r3Third resonant capacitorC r3The two ends of the switch tube are connected in parallel;
furthermore, the switch tube is a single switch device or a single tube unit formed by connecting a plurality of switch devices in parallel;
further, a switch tubeQThe single-tube unit is formed by connecting one switching device or a plurality of switching devices in parallel;
further, the primary impedance transformation network also comprises a fourth resonant capacitorC r4Fourth resonant capacitorC r4Resonant inductor with primary impedance transformation networkL r Are connected in parallel;
further, the primary impedance transformation network also comprises a second resonant inductorL r2Said second resonant capacitorC r2A second transmitting coilL p2And a second resonant inductorL r2After being connected in series, the first resonant capacitorC r1Connected in parallel and satisfies the following conditions:
。
further, in the primary unit, a first transmission coilL p1And/or a second transmitting coilL p2Two or more transmitting coils are connected in series, and a receiving coil and a compensating unit are correspondingly added in the secondary side unit; when the second transmitting coil is connected in series by two transmitting coils, it is notedL p2AndL p3then, the following conditions need to be satisfied:
furthermore, the secondary side unit also comprises a secondary side rectifying and filtering circuit;
the secondary side rectifying and filtering circuit only comprises one rectifying and filtering circuit, and the output of the first compensation unit Z01 is connected with the output of the second compensation unit Z02 in series or in parallel and then is sequentially connected with the secondary side rectifying and filtering circuit and a load resistor;
or the secondary side rectifying and filtering circuit comprises a first rectifying and filtering circuit and a second rectifying and filtering circuit, and the first receiving coilL s1The first compensation unit Z01 and the first rectifying and filtering circuit are connected in sequence, and the second receiving coilL s2The second compensation unit Z02 and the second rectifying and filtering circuit are connected in sequence, and the output of the first rectifying and filtering circuit is connected with the output of the second rectifying and filtering circuit in series or in parallel and then connected with the load resistor in parallel.
Compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, the non-contact single-tube resonant converter with the primary-side impedance conversion network is provided, and the output voltage/current gain fluctuation of the converter is reduced by utilizing the characteristic that the increase and decrease of the power transmitted by the mutual inductance of the two energy couplers under the working conditions of offset and air gap change, so that the anti-offset capability and the capability of adapting to the air gap change of the non-contact single-tube resonant converter are improved.
Drawings
FIG. 1 is a schematic diagram of a topology structure of a non-contact single-tube resonant converter with a primary impedance transformation network according to the present invention;
FIG. 2 is an equivalent circuit of FIG. 1;
FIG. 3(1) is an equivalent circuit of FIG. 2 when the Q-switch is turned on;
FIG. 3(2) is an equivalent circuit of the Q-switch in FIG. 2 when the Q-switch is turned off;
FIG. 4 is a circuit diagram according to an embodiment;
FIG. 5 is an energy coupler structure-a quadrature dual DD coil structure-employed in an embodiment of the present invention;
FIG. 6 is a calculation result of the output current gain of the circuit according to the first embodiment;
FIG. 7 is a simulation result of the output current gain of the circuit according to the first embodiment;
FIG. 8 is a non-contact single tube resonant converter topology before improvement;
FIG. 9 is a simulation result of a non-contact single-tube resonant converter before improvement;
FIG. 10 is a circuit diagram according to a second embodiment;
FIG. 11 is a schematic circuit diagram of a third embodiment;
FIG. 12 is a diagram of a fourth circuit according to an embodiment;
FIG. 13 is a schematic diagram of a fifth embodiment;
FIG. 14 is a sixth circuit schematic of an embodiment;
FIG. 15 is a circuit diagram according to a seventh embodiment;
FIG. 16 is a schematic circuit diagram of an eighth embodiment;
FIG. 17 is a circuit diagram illustrating a ninth embodiment;
in the figure:V in -a supply voltage, Q-switch tube,L p1-a first transmitting coil for transmitting a first signal,i p1-a current flowing through the first transmitting coil,L p2-a second transmitting coil for transmitting the second signal,i p2-a current flowing through the second transmitting coil,L p3-a third transmitting coil for transmitting the data,C r 、C r1、C r2、C r3、C r4-a primary side resonance capacitance,C Q the parasitic capacitance of the primary side switching tube Q,L r 、L r1、L r2-a primary side resonant inductance,R e1-a first path secondary side folded resistance,R e2-a second secondary side folded resistance,L s1-a first receiving coil for receiving a first signal,L s2-a second receiving coil for receiving the second signal,L s3-a third receiving coil for receiving the third signal,C s 、C s1、C s2、C s3、C 1、C 2、C 3-a compensation capacitance in the secondary side compensation unit,L 1、L 2、L 3-the secondary side compensating inductance,i L1the output current of the first compensation unit Z01,i L2the output current of the second compensation unit Z02,i L3output current of the third compensation unit Z03, D1～D8-a rectifying diode for rectifying the voltage of the power supply,C o 、C o1、C o2、C o3-a filter capacitance, which is,R L -a load resistance, the load resistance being,u 1the output voltage of the first compensation unit Z01,u 2the output voltage of the second compensation unit Z02,L f -a filter inductance, which is,M f -a mutual inductance between the first transmitter coil and the first receiver coil,M s -a mutual inductance between the second transmitter coil and the second receiver coil,M t -a mutual inductance between the third transmitter coil and the third receiver coil,Mmutual inductance between transmitter coil and receiver coil, Z01, Z02, Z03-secondary compensation unit,G ii -an output current gain.
Detailed Description
The invention is further explained below with reference to the drawings.
As shown in FIG. 1, the non-contact single-tube resonant converter with the primary impedance transformation network of the invention comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube; the secondary side unit comprises a receiving coil, a compensation unit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02.
The first compensation unit Z01 adopts a series compensation structure, a parallel compensation structure, an SP compensation structure, an LCL compensation structure, or an LCC compensation structure, and the second compensation unit Z02 adopts a series compensation structure, a parallel compensation structure, an SP compensation structure, an LCL compensation structure, or an LCC compensation structure.
The rectifying mode of the topological structure of the non-contact single-tube resonant converter with the primary impedance conversion network in the invention as shown in fig. 1 can adopt the rectifying modes such as full-bridge rectification, half-bridge rectification, voltage-multiplying rectification, current-multiplying rectification, controllable rectification and the like.
FIG. 1 is an equivalent circuit as shown in FIG. 2, and the resonance frequency of the compensation unit is setAt the switching frequency, the input impedance of the first and second receiving coils is resistive, and the secondary reflected impedance of the two energy couplers is pure impedanceR e1AndR e2the expression is shown as formula (1), whereinwIn order to switch the angular frequency of the switch,w=2πf，fis the switching frequency.
Taking fig. 1 as an example, the working principle is as follows:
when the switch tube Q is switched on, the energy storage branch routeV in 、L p1AndL r the components of the composition are as follows,i p1approximately linearly rising, after Q is turned off,L p1、C r1、R e1、C r2 、L p2、C Q 、R e2andL r resonant to realize inversion function, and resonant capacitorC r1The two ends generate alternating non-sinusoidal resonant voltage which is equivalent to the output square wave of bridge inversion. Due to the fact thatR e1AndR e2take part in the resonance process, thusR e1AndR e2will be right forC r1The amplitude of the voltage at both ends is affected, and according to the formula (1), the load change will affectC r1The magnitude of the voltage across the terminals, i.e.C r1The voltage across is not a constant voltage source. If it isL p1、C r1、R e1、C r2、L p2、C r3、R e2AndL r the design of the parameters is improper, so that the Q is in a hard-on working condition, and the circuit cannot work normally. In addition to this, the present invention is,L r participates in the energy storage and resonance processes, has the energy storage and resonance functions at the same time, and is indispensable for realizing the resonance inversion functionIf atL r The branch circuit increases the capacitance or replaces the capacitance with the capacitance, and the energy storage branch circuit can not work normally due to the blocking effect of the capacitance, namely the resonant inversion process can not be realized.
As can be seen from the above description of the operation process, the circuit has two resonant frequenciesf r1Andf r2the equivalent circuit is shown in fig. 3(1) and fig. 3 (2). When Q is on, the resonant element isL p1、R e1、C r2、L r 、L p2、R e2、V in At a resonant frequency off r1(ii) a When Q is off, the resonant element isL p1、R e1、C r1、C r2、C r3、L r 、L p2、R e2、V in At a resonant frequency off r2。
The parameters of the primary impedance transformation network satisfy the following conditions:
make the primary coil current of the non-contact single-tube resonant converter in FIG. 2i p1Has a fundamental current amplitude ofI ac Then the second transmitting coil currenti p2Fundamental wave size ofI p2Comprises the following steps:
substituting formula (2) for formula (3) to obtain:
the power transmitted by the two energy couplers being independent of the losses of the converter in the elementP 1AndP 2comprises the following steps:
substituting the formula (1) and the formula (4) into the formula (5) to obtain:
as can be seen from the formula (6),P 1andM f 2in a direct proportion to the total weight of the composition,P 2andM s 2or the inverse ratio. WhileM f AndM s the relative position of the energy coupler is changed to increase and decrease, so thatM f AndM s when the primary side and the secondary side of the energy coupler are dislocated and reduced,P 1the number of the grooves is reduced, and the,P 2increase, compensate each other, total transmitted power: (P 1+P 2) The variation is small, i.e. the output voltage/current gain of the converter fluctuates less.
Example one
As shown in FIG. 4, the non-contact single-tube resonant converter with the primary impedance conversion network of the invention comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprisesA first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r 。
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
as shown in fig. 5, the first radiation coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. First radiation coilL p1And a first receiving coilL s1An energy coupler is formed between the first and second transmitting coilsL p2And a second receiving coilL s2An energy coupler is formed between the two energy couplers, and the two energy couplers adopt a quadrature double DD coil structure.
The first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected in parallel with the output of the second compensation unit Z02 and then is connected with the secondary side rectification filter circuit and the load in sequence; the switching tube Q is composed of a MOSFET.
The parameters of the primary impedance transformation network meet the conditions shown in the formula (7):
the resonance elements of the secondary side first compensation unit and the secondary side second compensation unit satisfy the following conditions:
flow through compensation inductorL 2And a second transmitting coilL s2Current amplitude ofI L1AndI L2respectively as follows:
the formula (8) can be substituted with the formulae (4) and (7):
easily obtained, output current gainG ii Comprises the following steps:
mutual inductance of two energy couplers forming orthogonal double DD coil structure is staggered along with primary and secondary sidesThe distance and the air gap are changed to increase and decrease, namely the coupling coefficient is approximately increased and decreased. The coupling coefficient relationship of two energy couplers constituting the orthogonal double DD coil structure is shown as a formula (12), wherein,k f is the coupling coefficient between the first transmitting coil and the first receiving coil,k s is the coupling coefficient between the second transmitting coil and the second receiving coil,αis a scaling factor.
Substituting formula (12) for formula (11) to obtain:
as can be seen from equation (13), the output current gain has a minimum value, and the condition needs to be satisfied:
according to equation (13) can be drawnG ii Followed byk s As shown in fig. 6. Obviously, only the valley bottom of the gain curve is arranged in the working interval of the energy coupler, and small output voltage/current gain fluctuation can be realized under the working conditions of dislocation of the energy coupler and air gap changing. If at the coupling coefficientk∈[k 1,k 2]The minimum output voltage/current ripple is achieved within the interval, equation (15) is satisfied, wherein,k 0is composed ofG ii The minimum value point of (c).
To verify the feasibility of the inventionk∈[0.1,0.3]Insofar as a set of simulation parameters is given based on the above theoretical analysis, e.g.Table 1 shows that the coupling coefficients of the two energy couplers are made to be identical, i.e. the proportionality coefficientsαThe coupling between the first transmitting coil and the second transmitting coil and the coupling between the second transmitting coil and the second receiving coil are respectively equal to 1 and 0, respectively. The result of the variation of the output current gain with the coupling coefficient is shown in FIG. 7, defining the output rippleξThe following were used:
then, according to the simulation result, in the variation range of 3 times of the coupling coefficient,ξonly 1.165.
TABLE 1 simulation parameters
A set of simulation results of the non-contact Single-tube Resonant Converter shown in FIG. 8 in the papers S, Zhang, Q, Chen, Z, Li, X, Ren and Z, Zhang, "Analysis and Design of a 500W Single-switch contact Converter," 201922 nd International reference on electric Machines and Systems (ICEMS), Harbin, China, 2019, pp. 1-5 is given below to highlight the effectiveness of the present embodiment. Table 2 shows simulation parameters, fig. 9 shows simulation results of output gain of the circuit shown in fig. 8, in a variation range of 3 times of the coupling coefficient,ξup to 3, far exceeding the output fluctuations of the present embodiment.
Table 2 simulation parameters for the circuit of fig. 8
Example two
As shown in FIG. 10, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
the energy coupler adopts a quadrature double DD coil structure, as shown in FIG. 5, a first transmitting coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. The first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, the first compensation unit Z02 is a series compensation structureReceiving coilL s1A second receiving coil sequentially connected with the first compensation unit Z01 and the first secondary side rectifying and filtering circuitL s2The second compensation unit Z02 and the second secondary side rectification filter circuit are sequentially connected, and the output of the first secondary side rectification filter circuit is connected in parallel with the output of the second secondary side rectification filter circuit and then connected in parallel with the load; the first secondary side rectifying and filtering circuit and the second secondary side rectifying and filtering circuit both adopt a full-bridge rectifying and C filtering structure; the switching tube Q is composed of a MOSFET.
The principle of the embodiment is the same as that of the embodiment I, and the circuit parameter design is the same, except that the embodiment adopts two rectifying and filtering circuits, and the outputs of the two rectifying and filtering circuits are connected in parallel and then connected with the load resistor.
EXAMPLE III
As shown in FIG. 11, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention includes an input power sourceV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Are connected in parallelThen connected in series with a switching tube Q and finally connected in parallel with an input power supplyV in Two ends;
the energy coupler adopts a quadrature double DD coil structure, as shown in FIG. 5, a first transmitting coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. The first compensation unit Z01 is a series compensation structure, the second compensation unit Z02 is an LCC compensation structure, and the first receiving coilL s1A second receiving coil sequentially connected with the first compensation unit Z01 and the first secondary side rectifying and filtering circuitL s2The second compensation unit Z02 and the second secondary side rectifying and filtering circuit are sequentially connected, and the output of the first secondary side rectifying and filtering circuit is connected with the output of the second secondary side rectifying and filtering circuit in series and then connected with the load in parallel; the first secondary side rectifying and filtering circuit and the second secondary side rectifying and filtering circuit both adopt a full-bridge rectifying and C filtering structure; the switching tube Q is composed of a MOSFET.
The difference between this embodiment and the second embodiment is that the two compensation units in this embodiment have constant voltage characteristics at their outputs. However, the working principle of the primary side circuit is the same, and the power transmitted by the two energy couplers still has the opposite increasing and decreasing characteristics along with the change of the dislocation and the air gap.
The parameter design of the primary impedance transformation network is shown in the formula (7).
The parameters of the resonant elements of the secondary side first compensation unit and the secondary side second compensation unit meet the following conditions:
output voltages of the first and second compensation unitsU 1AndU 2respectively as follows:
gain of output voltageG vv As shown in the following formula:
the equation (19) and the equation (11) have only a constant coefficient difference, and the analysis of the output voltage gain fluctuation is substantially the same as that of the first embodiment, and is not repeated here.
Example four
As shown in FIG. 12, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention includes an input power sourceV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1A third resonant capacitorC r3And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two-terminal, third resonant capacitorC r3The two ends of the switching tube Q are connected in parallel;
the energy coupler adopts a quadrature double DD coil structure, as shown in FIG. 5, a first transmitting coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. The first compensation unit Z01 is a series compensation structure, the second compensation unit Z02 is an LCC compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected with the output of the second compensation unit Z02 in series and then is connected with the secondary side rectification filter circuit and the load in sequence; the switching tube Q is composed of a MOSFET.
In this embodiment, a third resonant capacitor is added, connected in parallel to two ends of the switching tube Q, and has the same function as the first resonant capacitor, and the capacitance value after the third resonant capacitor is connected in parallel to the first resonant capacitor should be the same as the first resonant capacitor in the first embodiment. The design of other circuit parameters is the same as that of the embodiment, the quantitative analysis process is the same as that of the embodiment, and the function of inhibiting output fluctuation when dislocation and air gap change occur is also realized.
EXAMPLE five
As shown in FIG. 13, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
the energy coupler adopts a quadrature double DD coil structure, as shown in FIG. 5, a first transmitting coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. The first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected in parallel with the output of the second compensation unit Z02 and then is connected with the secondary side rectification filter circuit and the load in sequence; the switch tube Q is formed by connecting two MOSFETs in parallel or formed by connecting an IGBT and a MOSFET in parallel.
The difference between the present embodiment and the first embodiment is that the switching tube Q is composed of two switching devices, the working principle and the circuit parameters are the same, and the output current fluctuation can be reduced.
EXAMPLE six
As shown in FIG. 14, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2A fourth resonant capacitorC r4And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Connected in parallel with a fourth resonant capacitorC r4Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
the energy coupler adopts a quadrature double DD coil structure, as shown in FIG. 5, a first transmitting coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. The first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected in parallel with the output of the second compensation unit Z02 and then is connected with the secondary side rectification filter circuit and the load in sequence; the switching tube Q is composed of a MOSFET.
EXAMPLE seven
As shown in FIG. 15, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention includes an input power sourceV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2Resonant inductorL r And a second resonant inductorL r2；
Second resonant capacitorC r2And a second transmitting coilL p2A second resonant inductorL r2Are sequentially connected in series and then connected with the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
the energy coupler adopts a quadrature double DD coil structure, as shown in FIG. 5, a first transmitting coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, first radiation coilL p1And a second transmitting coilL p2First radiation coilL p1And a second receiving coilL s2A second transmitting coilL p2And a first receiving coilL s1First receiving coilL s1And a second receiving coilL s2There is no magnetic flux coupling or weak magnetic coupling between them. The first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected in parallel with the output of the second compensation unit Z02 and then is connected with the secondary side rectification filter circuit and the load in sequence; the switching tube Q is composed of a MOSFET.
The parameter conditions required to be met by the primary impedance transformation network are as follows:
other parameter conditions were the same as in the first embodiment, and it can be seen that,L r2the increase is equivalent to increase the leakage inductance of the second transmitting coil, and the working principle is the same as that of the first embodiment.
Example eight
As shown in FIG. 16, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention includes an input power sourceV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A third transmitting coilL p3A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1A second receiving coilL s2And a third receiving coilL s3The compensation unit comprises a first compensation unit Z01, a second compensation unit Z02 and a third compensation unit Z03; the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1And a third transmitting coilL p3Connected in series, and connected in series with the primary impedance transformation network and the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
first radiation coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, third transmitting coilL p3And a third receiving coilL s3By mutual inductanceM t Coupling; the first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, the third compensation unit Z03 is an LCC compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2A third receiving coil connected in parallel to the input side of the second compensating unit Z02L s3The output of the first compensation unit Z01, the output of the second compensation unit Z02 and the output of the third compensation unit Z03 are connected in parallel and then are sequentially connected with the secondary side rectification filter circuit and the load; the switching tube Q is composed of a MOSFET.
The parameter design of the primary impedance transformation network is shown in the formula (7), and the parameter design of the secondary compensation unit is shown in the following formula:
the third transmitting coil is added to have no influence on the working characteristics of the impedance transformation network, and the third transmitting coil is connected with the first transmitting coil in series, so that the characteristics are the same, namely along with the change of dislocation and air gap, the power transmitted by the first group of energy couplers and the third group of energy couplers and the power transmitted by the second group of energy couplers have the characteristics of increasing and decreasing in an opposite way, and the fluctuation of output current can be reduced.
Example nine
As shown in FIG. 17, the non-contact single-tube resonant converter with the primary impedance conversion network of the present invention includes an input power sourceV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube Q; the secondary side unit comprises a receiving coil, a compensation unit, a secondary side rectifying and filtering circuit and a load resistorR L The receiving coil comprises a first receiving coilL s1A second receiving coilL s2And a third receiving coilL s3The compensation unit comprises a first compensation unit Z01, a second compensation unit Z02 and a third compensation unit Z03; the primary impedance transformation network comprises a second transmitting coilL p2A third transmitting coilL p3A second resonant capacitorC r2And a resonant inductorL r ；
Second resonant capacitorC r2And a second transmitting coilL p2A third transmitting coilL p3After being connected in series, the resonant inductorL r Parallel connected, resonant inductorL r Is the primary side impedanceTwo connection nodes of a transformation network; first radiation coilL p1Connected in series with the primary impedance transformation network and then connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube Q, and finally connected in parallel with the input power supplyV in Two ends;
first radiation coilL p1And a first receiving coilL s1By mutual inductanceM f Coupled, second transmitting coilL p2And a second receiving coilL s2By mutual inductanceM s Coupled, third transmitting coilL p3And a third receiving coilL s3By mutual inductanceM t Coupling; the first compensation unit Z01 is an LCC compensation structure, the second compensation unit Z02 is a series compensation structure, the third compensation unit Z03 is a series compensation structure, and the first receiving coilL s1A second receiving coil connected in parallel to the input side of the first compensating unit Z01L s2A third receiving coil connected in parallel to the input side of the second compensating unit Z02L s3The output of the first compensation unit Z01, the output of the second compensation unit Z02 and the output of the third compensation unit Z03 are connected in parallel and then are sequentially connected with the secondary side rectification filter circuit and the load; the switching tube Q is composed of a MOSFET.
The parameter conditions to be satisfied by the primary impedance transformation network are shown in the formula (22), and other circuit parameter conditions are the same as those in the first embodiment.
The third transmitting coil and the second transmitting coil are connected in series, so that the characteristics are the same, namely, along with the change of the dislocation and the air gap, the power transmitted by the first group of energy couplers and the power transmitted by the second group of energy couplers and the third group of energy couplers have the characteristics of increasing and decreasing in an opposite mode, and the fluctuation of the output current can be reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A non-contact single-tube resonant converter with a primary impedance transformation network comprises an input power supplyV in A primary side unit and a secondary side unit, wherein the primary side unit comprises a primary side impedance transformation network and a first transmission coilL p1A first resonant capacitorC r1And a switching tube; the secondary side unit comprises a receiving coil, a compensation unit and a load resistorR L The receiving coil comprises a first receiving coilL s1And a second receiving coilL s2The compensation unit comprises a first compensation unit Z01 and a second compensation unit Z02;
the primary impedance transformation network comprises a second transmitting coilL p2A second resonant capacitorC r2And a resonant inductorL r Said second resonant capacitorC r2First and second transmitting coilsL p2Series connected, rear and resonant inductorsL r Parallel connected, resonant inductorL r The two ends of the primary impedance transformation network are two connection nodes of the primary impedance transformation network; first radiation coilL p1Is connected with the primary impedance transformation network in series and then is connected with the first resonant capacitorC r1Connected in parallel, connected in series with the switching tube, and finally connected in parallel to the input power supplyV in Two ends;
the first receiving coilL s1A second receiving coil connected with the first compensating unit Z01L s2The output of the first compensation unit Z01 is connected with the output of the second compensation unit Z02 in series or in parallel and then is connected with the negativeThe load resistors are connected in sequence;
the first radiation coilL p1With only the first receiving coilL s1Coupled, second transmitting coilL p2With only the second receiving coilL s2Coupling to form two energy couplers; when the converter has dislocation and variable air gap working conditions, the output voltage/current gain fluctuation of the converter is reduced by utilizing the characteristic that the power transmitted by the two energy couplers is increased or decreased in an opposite way; wherein the parameter conditions of the primary impedance transformation network are as follows, whereinfFor the switching frequency:
2. the non-contact single-tube resonant converter with the primary impedance transformation network of claim 1, wherein: the primary side unit is provided with a third resonant capacitorC r3Third resonant capacitorC r3Are connected in parallel at two ends of the switch tube.
3. The non-contact single-tube resonant converter with the primary impedance transformation network of claim 1, wherein: the switch tube is a single switch device or a single tube unit formed by connecting a plurality of switch devices in parallel.
4. The non-contact single-tube resonant converter with the primary impedance transformation network of claim 2, wherein: switch tubeQThe single-tube unit is formed by connecting one switching device or a plurality of switching devices in parallel.
5. The non-contact single-tube resonant converter with the primary impedance transformation network as recited in claim 3 or 4, wherein: the primary impedance transformation network further comprises a fourth resonant capacitorC r4Fourth resonant capacitorC r4Resonant inductor with primary impedance transformation networkL r Are connected in parallel.
6. The non-contact single-tube resonant converter with the primary impedance transformation network as recited in claim 3 or 4, wherein: the primary impedance transformation network also comprises a second resonant inductorL r2Said second resonant capacitorC r2A second transmitting coilL p2And a second resonant inductorL r2After being connected in series, the first resonant capacitorC r1Connected in parallel and satisfies the following conditions:
7. the non-contact single-tube resonant converter with the primary impedance transformation network as recited in claim 3 or 4, wherein: in the primary unit, the first radiation coilL p1And/or a second transmitting coilL p2Two or more transmitting coils are connected in series, and a receiving coil and a compensating unit are correspondingly added in the secondary side unit; when the second transmitting coil is connected in series by two transmitting coils, it is notedL p2AndL p3then, the following conditions need to be satisfied:
8. the non-contact single-tube resonant converter with the primary impedance transformation network of claim 1, wherein: the secondary side unit also comprises a secondary side rectifying and filtering circuit;
the secondary side rectifying and filtering circuit only comprises one rectifying and filtering circuit, and the output of the first compensation unit Z01 is connected with the output of the second compensation unit Z02 in series or in parallel and then is sequentially connected with the secondary side rectifying and filtering circuit and a load resistor;
or the secondary side rectifying and filtering circuit comprises a first rectifying and filtering circuit and a second rectifying and filtering circuit, and the first receiving coilL s1The first compensation unit Z01 and the first rectifying and filtering circuit are connected in sequence, and the second receiving coilL s2The second compensation unit Z02 and the second rectifying and filtering circuit are connected in sequence, and the output of the first rectifying and filtering circuit is connected with the output of the second rectifying and filtering circuit in series or in parallel and then connected with the load resistor in parallel.
9. The non-contact single-tube resonant converter with the primary impedance transformation network of claim 2, wherein: the secondary side unit also comprises a secondary side rectifying and filtering circuit;
the secondary side rectifying and filtering circuit only comprises one rectifying and filtering circuit, and the output of the first compensation unit Z01 is connected with the output of the second compensation unit Z02 in series or in parallel and then is sequentially connected with the secondary side rectifying and filtering circuit and a load resistor;
or the secondary side rectifying and filtering circuit comprises a first rectifying and filtering circuit and a second rectifying and filtering circuit, and the first receiving coilL s1The first compensation unit Z01 and the first rectifying and filtering circuit are connected in sequence, and the second receiving coilL s2The second compensation unit Z02 and the second rectifying and filtering circuit are connected in sequence, and the output of the first rectifying and filtering circuit is connected with the output of the second rectifying and filtering circuit in series or in parallel and then connected with the load resistor in parallel.
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| US20180037124A1 (en) * | 2016-08-08 | 2018-02-08 | Hyundai Motor Company | Electric vehicle parallel charging method and apparatus |
| CN110212778A (en) * | 2019-06-28 | 2019-09-06 | 南京航空航天大学 | A kind of non-contact single tube controlled resonant converter |
| CN209860803U (en) * | 2019-06-28 | 2019-12-27 | 南京航空航天大学 | Non-contact single-tube resonant converter |
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| US20180037124A1 (en) * | 2016-08-08 | 2018-02-08 | Hyundai Motor Company | Electric vehicle parallel charging method and apparatus |
| CN110212778A (en) * | 2019-06-28 | 2019-09-06 | 南京航空航天大学 | A kind of non-contact single tube controlled resonant converter |
| CN209860803U (en) * | 2019-06-28 | 2019-12-27 | 南京航空航天大学 | Non-contact single-tube resonant converter |
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