CN106740220A - A kind of wireless charging circuit of constant current constant voltage Compound Topology - Google Patents

A kind of wireless charging circuit of constant current constant voltage Compound Topology Download PDF

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Publication number
CN106740220A
CN106740220A CN201710008374.1A CN201710008374A CN106740220A CN 106740220 A CN106740220 A CN 106740220A CN 201710008374 A CN201710008374 A CN 201710008374A CN 106740220 A CN106740220 A CN 106740220A
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China
Prior art keywords
circuit
wireless charging
inductance
connects
resonant capacitance
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CN201710008374.1A
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Chinese (zh)
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CN106740220B (en
Inventor
雷艳婷
李建华
袁庆民
茹永刚
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Xian Tgood Intelligent Charging Technology Co Ltd
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Xian Tgood Intelligent Charging Technology Co Ltd
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Priority to CN201710008374.1A priority Critical patent/CN106740220B/en
Publication of CN106740220A publication Critical patent/CN106740220A/en
Priority to PCT/CN2017/090443 priority patent/WO2018126617A1/en
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to a kind of wireless charging circuit of constant current constant voltage Compound Topology, in the wireless charging circuit, primary side compensating module includes the first inductance and the first resonant capacitance, the first end of the first resonant capacitance connects the first output end of high-frequency inverter circuit, second end of the first resonant capacitance connects the first end of the first inductance, and the second end of the first inductance connects the second output end of high-frequency inverter circuit；Secondary compensating module includes the second inductance, the second resonant capacitance, the 3rd resonant capacitance and switch, the first end of the second resonant capacitance connects the first input end of the second rectification circuit, second end of the second resonant capacitance connects the first end of the second inductance, second end of the second inductance connects the second input of the second rectification circuit, and switch and the 3rd resonant capacitance are connected between the first end of the second resonant capacitance and the second end of the second inductance.Implement technical scheme, number of switches is few, circuit small volume, control are simple, and power output and efficiency of transmission are high.

Description

A kind of wireless charging circuit of constant current constant voltage Compound Topology
Technical field
The present invention relates to wireless charging field, more particularly to a kind of wireless charging circuit of constant current constant voltage Compound Topology.
Background technology
To reduce environmental pollution and extenuating the crisis of energy shortage, the development of electric automobile receives the generally pass in the world Note, solves the problems, such as the charging batteries of electric automobile also focus as society research.Charging batteries of electric automobile method has tradition Contact charge and contactless charging.Compared with conventional contact charging modes, wireless charging can avoid electric spark it is dangerous, Conductor wire losses are reduced, car body weight is reduced, is had the advantages that security reliability is high, and some are special to can be applied to mining site, seabed etc. Different occasion.
Loosely coupled transformer is the core parts of wireless charging, and its separate former and deputy side winding and larger distance make it Have the shortcomings that leakage inductance is big, magnetizing inductance is small compared to close coupling transformer, therefore compensation network turns into the research of wireless charging circuit Emphasis, loosely coupled transformer must use multi-element resonant converter, and leakage inductance and magnetizing inductance are compensated respectively, improve voltage and increase Benefit and power delivery capabilities, reduce circulation loss.And in battery charging process, the constant current constant voltage stage is the important rank charged Section, can make wireless charging system be operated in constant current by carrying out the modes such as parameter tuning, topology switching and control to compensation network Pressure constant state.
Traditional adds chop control link in wireless charging system secondary circuit, by controlling chopper circuit, realizes steady Pressure output.Although reaching the output of voltage individual loads, stage circuit is added in the whole topological circuit of wireless power transmission, Making the efficiency of transmission of system reduces.Or under string/string compensation (S/S) (or other single compensation topologies) topology, do not increasing Plus on the premise of control, by changing circuit parameter, realize that constant current constant voltage is exported under two kinds of different parameters.But practical application Coil self-induction also changes therewith when frequency changes, and control system is operated in more difficult at resonance point.For example, Chinese patent CN 104753152A discloses a kind of induction type charging system of constant current-constant pressure Compound Topology, and which can be such that system is mended in string/string Repay and realize in (S/S) topological circuit constant current output, and constant pressure is realized in parallel/serial compensation (P/S) topological circuit and is exported.Although should Mixed topology circuit can be implemented as battery constant-current constant-voltage charging, but in actual applications will be according to secondary battery both end voltage The switching of primary side resonant capacitance is controlled, therefore increased system cost and control difficulty.
As fully visible, there is three below in prior art：
(1) the extra power conversion circuit that increases increased circuit volume to reach the constant pressure or current constant control of system, transmit It is less efficient；
(2) under single topology control, system is more difficult to be operated at resonance point, influences system power and efficiency；
(3) SS/PS can realize battery constant-current constant-voltage charging, but two stage control system high cost, and difficulty is big.
The content of the invention
The technical problem to be solved in the present invention is that the cascade of above-mentioned mapping device, control for prior art are complicated, electricity A kind of defect that road volume is big, switching switch is numerous and diverse, there is provided wireless charging circuit of constant current constant voltage Compound Topology.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of the wireless of constant current constant voltage Compound Topology Charging circuit, including the first rectification circuit, high-frequency inverter circuit, resonance compensation circuit, the second rectification circuit being sequentially connected, institute Stating resonance compensation circuit includes primary side compensating module and secondary compensating module, wherein,
The primary side compensating module includes the first inductance and the first resonant capacitance, and, the of first resonant capacitance One end connects the first output end of the high-frequency inverter circuit, and the second end of first resonant capacitance connects first inductance First end, the second end of first inductance connects the second output end of the high-frequency inverter circuit；
The secondary compensating module includes the second inductance, the second resonant capacitance, the 3rd resonant capacitance and switch, and, institute The first end for stating the second resonant capacitance connects the first input end of second rectification circuit, the second of second resonant capacitance The first end of end connection second inductance, the second end of second inductance connects the second input of second rectification circuit End, the switch and the 3rd resonant capacitance are connected on the of the first end of second resonant capacitance and second inductance Between two ends；
And, the switch disconnects in the voltage not up to voltage-target that second rectification circuit is exported, nothing Line charging circuit is in constant current mode, and the switch reaches voltage target in the voltage that second rectification circuit is exported Closed during value, wireless charging circuit is in constant pressure mode of operation.
Preferably, the high-frequency inverter circuit is forward conversion circuit, inverse-excitation converting circuit, push-pull inverter, half Bridge inverter circuit or full bridge inverter.
Preferably, first rectification circuit is PFC rectification circuits.
Preferably, the PFC rectification circuits include diode three-phase commutation bridge, first group of switching device, second group of switch Device, the 3rd group of switching device, the first electrochemical capacitor, the second electrochemical capacitor, and, three of the diode three-phase commutation bridge Input is respectively connected to three-phase alternating voltage, and the positive pole line end of the diode three-phase commutation bridge connects first electrochemical capacitor Positive pole, the negative pole of first electrochemical capacitor connects the positive pole of second electrochemical capacitor, second electrochemical capacitor it is negative Pole connects the negative busbar end of the diode three-phase commutation bridge, and the first end of first group of switching device connects the diode The first input end of three-phase commutation bridge, the first end of second group of switching device connects the of the diode three-phase commutation bridge Two inputs, the first end of the 3rd group of switching device connects the 3rd input of the diode three-phase commutation bridge, described First group of the second end of switching device, the second end of second group of switching device, second end of the 3rd group of switching device The negative pole of first electrochemical capacitor is connected respectively.
Preferably, the high-frequency inverter circuit includes first switch pipe and second switch pipe, wherein, the first switch pipe First end connect the positive pole line end of first rectification circuit, the first end of the second switch pipe connects first rectification Second end of the negative busbar end of circuit, the second end of the first switch pipe and the second switch pipe connects described first respectively The first end of resonant capacitance, the second end of first inductance connects the negative terminal of first electrochemical capacitor.
Preferably, the also equivalent load circuit including being connected with second rectification circuit.
Preferably, the equivalent load circuit includes battery.
Preferably, the equivalent load circuit also includes being connected between second rectification circuit and the battery Circuit for power conversion.
Implement technical scheme, have the advantages that：
1. the resonance compensation circuit either SS topologys or SSP topologys in the wireless charging circuit, easy to control humorous At shaking, wireless charging circuit is set to possess power output and efficiency of transmission higher；
2. in the handoff procedure of constant-current constant-voltage charging pattern, the resonant network of the wireless charging circuit is operated in fixation Voltage gain point of intersection, input impedance angle is zero state, and switching loss is small under this state, be beneficial to improve wireless charging electricity The efficiency on road；
The switching of 3.SS/SSP topologys makes the wireless charging circuit be operated in constant current constant voltage by only needing a switching switch Two kinds of working conditions, therefore, SS/SSP topologys switching device is few, circuit small volume, constant current constant voltage switching control are simpler.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.In accompanying drawing：
Fig. 1 is the circuit diagram of the wireless charging circuit embodiment one of constant current constant voltage Compound Topology of the present invention；
Fig. 2 is the circuit diagram of wireless charging circuit in Fig. 1 under constant current charging mode；
Fig. 3 is the current waveform figure of the second rectification circuit of the wireless charging circuit in Fig. 2 before and after load changing；
Fig. 4 is the circuit diagram of wireless charging circuit in Fig. 1 under constant-voltage charge pattern；
Fig. 5 is the voltage oscillogram of the second rectification circuit of the wireless charging circuit in Fig. 4 before and after load changing；
Fig. 6 is the circuit diagram of the wireless charging circuit embodiment two of constant current constant voltage Compound Topology of the present invention；
Fig. 7 is the circuit diagram of the first rectification circuit embodiment one of the wireless charging circuit in Fig. 6.
Specific embodiment
Fig. 1 is the circuit diagram of the wireless charging circuit embodiment one of constant current constant voltage Compound Topology of the present invention, the embodiment Wireless charging circuit includes the first rectification circuit 1, high-frequency inverter circuit 2, resonance compensation circuit 3, the second rectification that are sequentially connected Circuit 4 and equivalent load circuit 5.
In this embodiment, the first rectification circuit 1 is used to for single-phase civil power to be transformed into DC voltage, certainly, in other realities Apply in example, if input voltage is three-phase alternating current civil power, first rectification circuit 1 can be the rectification circuit of three-phase.Additionally, it is preferred that Ground, first rectification circuit 1 is PFC rectification circuits.
In this embodiment, high-frequency inverter circuit 2 is full bridge inverter, and straight for export the first rectification circuit Stream electricity is converted to high frequency ac signal.Certainly, in other embodiments, the high-frequency inverter circuit 2 can also for forward conversion circuit, Inverse-excitation converting circuit, push-pull inverter, half-bridge inversion circuit etc..
In this embodiment, resonance compensation circuit 3 includes primary side compensating module 31 and secondary compensating module 32.Wherein, it is former Side compensating module 31 includes the first inductance L1With the first resonant capacitance C1, secondary compensating module 32 include the second inductance L2, it is second humorous Shake electric capacity C2, the 3rd resonant capacitance C3And switch S1, and, the first inductance L1With the second inductance L2It is coupled, to constitute noncontact Transformer.Wherein, in primary side compensating module 31, the first resonant capacitance C1First end connection high-frequency inverter circuit 2 first Output end, the first resonant capacitance C1The second end connect the first inductance L1First end, the first inductance L1The second end connection high frequency Second output end of inverter circuit 2.In secondary compensating module 32, the second resonant capacitance C2First end connect the second rectified current The first input end on road 4, the second resonant capacitance C2The second end connect the second inductance L2First end, the second inductance L2Second Second input of the second rectification circuit 4 of end connection, switchs S1First end connect the second resonant capacitance C2First end, switch S1The second end pass through the 3rd resonant capacitance C3Connect the second inductance L2The second end.Certainly, in another embodiment, switch S1With the 3rd resonant capacitance C3Position it is interchangeable.
In this embodiment, the high frequency ac signal that the second rectification circuit 4 is used to be coupled is converted into direct current signal, should Second rectification circuit 4 may include matching rectification and filter circuit etc..
In addition, on equivalent load circuit 5, in one alternate embodiment, it may particularly include battery, the battery Directly the output end with the second rectification circuit is connected.Certainly, in another alternative embodiment, can also further include that power turns Circuit is changed, the circuit for power conversion is connected between the second rectification circuit and battery, for export the second rectification circuit Voltage and current signal be converted into battery needed for voltage and current signal.
In this embodiment, S is switched1Disconnected in the voltage not up to voltage-target that the second rectification circuit 4 is exported, Now, the wireless charging circuit is in constant current mode, switchs S1The voltage exported in the second rectification circuit 4 reaches voltage Closed during desired value, now, wireless charging circuit is in constant pressure mode of operation.Wherein, voltage-target is when battery reaches During rated voltage, the voltage corresponding to the output of the second rectification circuit.
In the wireless charging circuit shown in Fig. 1, resonance compensation circuit 3 is that SS (series connection of primary side series connection secondary)/SSP is (former Side series connection secondary connection in series-parallel) Compound Topology, it can switch between constant current charging mode and constant-voltage charge pattern.
When the voltage not up to voltage-target that the second rectification circuit is exported, switch S1 disconnects, now, resonance compensation electricity Road 3 is switched to SS topologys, and the wireless charging circuit enters constant current charging mode.With reference to Fig. 2, the first inductance in primary side compensating module L1With the first resonant capacitance C1Generation resonance, the second inductance L in secondary compensating module2With the second resonant capacitance C2Generation resonance, Resonant frequencyEquivalent input impedance now Wherein, M is the mutual inductance of non-contact transformer, andThe coefficient of coupWherein n is noncontact The transformer primary secondary coil turn ratio, LMIt is the magnetizing inductance of non-contact transformer.In addition, the perseverance can be extrapolated by fundamental Wave Analysis (when battery is directly connected with the second rectification circuit, the electric current is the electric current of the second rectification circuit output of current charge pattern Battery charging current) IbatIt is represented by：Wherein, D is the defeated of high-frequency inverter circuit Enter voltage UABDutycycle.Thus can determine that, when the SS topologys meet resonant frequencyWhen, store Battery charge IbatIt is an output quantity unrelated with load, i.e. wireless charging circuit is in switch S1Can be operated in during disconnection Constant current mode.
Emulation before and after load changing is carried out by the output current of the second rectification circuit in Fig. 2, simulation result is such as Shown in Fig. 3, anticlimax load, output current I when in 0.006sbatTended towards stability after having fluctuation, but fluctuation maintenance about 1ms, and Current amplitude is constant before and after load changing, i.e. the wireless charging circuit can be operated in constant current operation state.
When the voltage that the second rectification circuit is exported reaches voltage-target, switch S1 closures, now, resonance Compensation circuit 3 is switched to SSP topologys, and the wireless charging circuit enters constant-voltage charge pattern.With reference to Fig. 4, primary side compensation The first inductance L in module1Equivalent leakage inductance Ll1With the first resonant capacitance C1Generation resonance, in secondary compensating module Second inductance L2Equivalent leakage inductance Ll2With the second resonant capacitance C2Generation resonance, magnetizing inductance LMWith the 3rd resonant capacitance C3Generation resonance, resonant frequencyEquivalent input impedance nowWherein M is the mutual inductance of non-contact transformer, ReqFor second whole The equivalent load connect after current circuit,The coefficient of coupN is former non-contact transformer The secondary coil turn ratio.Wherein, the first inductance L1, the second inductance L2With equivalent leakage inductance Ll1、Ll2Relation be：L1=Ll1+LM, L2= Ll2+n2LM.In addition, the output voltage that the second rectification circuit of the constant-voltage charge pattern can be extrapolated by fundamental Wave Analysis (works as storage When battery is directly connected with the second rectification circuit, the voltage is battery charging voltage) UbatIt is represented byThus, it may be determined that go out when SSP topologys meet resonant frequency When, battery charging voltage UbatIt is an output quantity unrelated with load, i.e. wireless charging circuit can be operated in constant pressure work Pattern.
Emulation before and after load changing, simulation result are carried out by the output voltage to the second rectification circuit shown in Fig. 4 As shown in figure 5, anticlimax load, output voltage U when in simulation time 0.005sbatAfter having fluctuation, but fluctuation maintenance about 2ms Tend towards stability, and voltage magnitude is constant before and after load changing, i.e. the wireless charging circuit is operated in constant pressure working condition.
By implementing the technical scheme of above-described embodiment, due to two kinds of resonance compensation topologys of SS topological sums SSP topologys being tied In closing same wireless charging circuit, and switch the wireless charging circuit and be operated in constant current or constant pressure Working mould by switching Formula, so, have the following effects that：
1.SS topologys are only operated under constant current state, need to only ensure resonant parameter of the SS configurations in constant current state, i.e. only need Ensure the first resonant capacitance and the first inductance resonance, the second resonant capacitance and the second inductance resonance, without taking into account constant pressure State.And SSP topologys are only operated under pressure constant state, and, at voltage gain point, circuit works in resonant condition, therefore electric Road output constant pressure point is circuit resonance point.That is, either SS topologys or SSP topologys, easy to control in resonance point Place, makes wireless charging circuit possess power output and efficiency of transmission higher；
2. in the handoff procedure of constant-current constant-voltage charging pattern, the resonant network of the wireless charging circuit is operated in fixation Voltage gain point of intersection, input impedance angle is zero state, and switching loss is small under this state, be beneficial to improve circuit efficiency；
The switching of 3.SS/SSP topologys makes the wireless charging circuit be operated in constant current constant voltage by only needing a switching switch Two kinds of working conditions.The switching device of the Compound Topology is few, circuit small volume, constant current constant voltage switching control are simpler.
Fig. 6 is the circuit diagram of the wireless charging circuit embodiment two of constant current constant voltage Compound Topology of the present invention.In the embodiment, First rectification circuit is PFC rectification circuits.
Fig. 7 is the circuit diagram of the first rectification circuit embodiment one of the wireless charging circuit in Fig. 6, as shown in fig. 7, the reality PFC rectification circuits include diode three-phase commutation bridge D in applying example11, first group of switching device Q1, second group of switching device Q2, Three groups of switching device Q3, the first electrochemical capacitor C11, the second electrochemical capacitor C12, herein it should be noted that, every group of switching device is Four combinations of switching tube.And, diode three-phase commutation bridge D11Three inputs be respectively connected to three-phase alternating voltage, two poles Pipe three-phase commutation bridge D11Positive pole line end connect the first electrochemical capacitor C11Positive pole, the first electrochemical capacitor C11Negative pole connection the Two electrochemical capacitor C12Positive pole, the second electrochemical capacitor C12Negative pole connection diode three-phase commutation bridge D11Negative busbar end, first Group switching device Q1First end connection diode three-phase commutation bridge D11First input end, second group of switching device Q2First End connects diode three-phase commutation bridge D11The second input, the 3rd group of switching device Q3First end connection diode three-phase it is whole Stream bridge D11The 3rd input, first group of switching device Q1The second end, second group of switching device Q2The second end, the 3rd group open Close device Q3The 3rd end connect the negative pole of the first electrochemical capacitor respectively.
Further, when the circuit structure of the first rectification circuit is the structure shown in Fig. 7, because the first rectification circuit is defeated It is positive and negative busbar to go out, therefore high-frequency inverter circuit need not use full-bridge inverting, using semi-bridge inversion, with reference to Fig. 6, and the height Frequency inverter circuit 2 includes first switch pipe Q4With second switch pipe Q5, wherein, first switch pipe Q4First end connection it is first whole The positive pole line end of current circuit, second switch pipe Q5First end connect the first rectification circuit negative busbar end, first switch pipe Q4's Second end and second switch pipe Q5The second end connect the first resonant capacitance C respectively1First end, the first inductance L1The second end Connect the first electrochemical capacitor C11Negative terminal.In this embodiment, first switch pipe Q4With second switch pipe Q5Alternate conduction, when One switching tube Q4During conducting, positive bus-bar provides energy；As second switch pipe Q5During conducting, negative busbar provides energy.
Using above-described embodiment of the application, circuit can be made to be operated in constant current or constant pressure working condition, required number of switches Less, circuit small volume, control are simple, and output power of circuit and efficiency of transmission are higher.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All any buns within the spirit and principles in the present invention, made Change, equivalent, improvement etc., should be included within scope of the presently claimed invention.

Claims (8)

1. a kind of wireless charging circuit of constant current constant voltage Compound Topology, including the first rectification circuit, the high-frequency inversion being sequentially connected Circuit, resonance compensation circuit, the second rectification circuit, it is characterised in that the resonance compensation circuit include primary side compensating module and Secondary compensating module, wherein,
The primary side compensating module includes the first inductance and the first resonant capacitance, and, the first end of first resonant capacitance Connect the first output end of the high-frequency inverter circuit, the second end of first resonant capacitance connects the of first inductance One end, the second end of first inductance connects the second output end of the high-frequency inverter circuit；
The secondary compensating module includes the second inductance, the second resonant capacitance, the 3rd resonant capacitance and switch, and, described the The first end of two resonant capacitances connects the first input end of second rectification circuit, and the second end of second resonant capacitance connects The first end of second inductance is connect, the second end of second inductance connects the second input of second rectification circuit, The switch and the 3rd resonant capacitance are connected on the first end and the second of second inductance of second resonant capacitance Between end；
And, the switch disconnects in the voltage not up to voltage-target that second rectification circuit is exported, wireless charging Circuit is in constant current mode, and the switch is when the voltage that second rectification circuit is exported reaches voltage-target Closure, wireless charging circuit is in constant pressure mode of operation.
2. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 1, it is characterised in that the high frequency is inverse It is forward conversion circuit, inverse-excitation converting circuit, push-pull inverter, half-bridge inversion circuit or full bridge inverter to become circuit.
3. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 1, it is characterised in that described first is whole Current circuit is PFC rectification circuits.
4. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 3, it is characterised in that the PFC is whole Current circuit includes diode three-phase commutation bridge, first group of switching device, second group of switching device, the 3rd group of switching device, firstth Electrochemical capacitor, the second electrochemical capacitor, and, three inputs of the diode three-phase commutation bridge are respectively connected to three-phase alternating current Pressure, the positive pole line end of the diode three-phase commutation bridge connects the positive pole of first electrochemical capacitor, first electrochemical capacitor Negative pole connect the positive pole of second electrochemical capacitor, the negative pole of second electrochemical capacitor connects the diode three phase rectifier The negative busbar end of bridge, the first end of first group of switching device connects the first input end of the diode three-phase commutation bridge, The first end of second group of switching device connects the second input of the diode three-phase commutation bridge, the 3rd group of switch 3rd input of the first end connection diode three-phase commutation bridge of device, the second end of first group of switching device, Second end of second group of switching device, the second end of the 3rd group of switching device connect first electrochemical capacitor respectively Negative pole.
5. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 4, it is characterised in that the high frequency is inverse Becoming circuit includes first switch pipe and second switch pipe, wherein, the first end of the first switch pipe connects first rectification The positive pole line end of circuit, the first end of the second switch pipe connects the negative busbar end of first rectification circuit, described first Second end of the second end of switching tube and the second switch pipe connects the first end of first resonant capacitance, described respectively Second end of one inductance connects the negative terminal of first electrochemical capacitor.
6. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 1, it is characterised in that also including with institute State the equivalent load circuit that the second rectification circuit is connected.
7. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 6, it is characterised in that the equivalent negative Carrying circuit includes battery.
8. the wireless charging circuit of constant current constant voltage Compound Topology according to claim 7, it is characterised in that the equivalent negative Carrying circuit also includes the circuit for power conversion being connected between second rectification circuit and the battery.
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