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CN109301904A - A wireless battery charging system with high-order composite compensation network - Google Patents

A wireless battery charging system with high-order composite compensation network Download PDF

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Publication number
CN109301904A
CN109301904A CN201811300716.8A CN201811300716A CN109301904A CN 109301904 A CN109301904 A CN 109301904A CN 201811300716 A CN201811300716 A CN 201811300716A CN 109301904 A CN109301904 A CN 109301904A
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CN
China
Prior art keywords
compensation
battery
switch
primary side
inductance
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Pending
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CN201811300716.8A
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Chinese (zh)
Inventor
曲小慧
姚运昌
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Southeast University
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Southeast University
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Priority to CN201811300716.8A priority Critical patent/CN109301904A/en
Publication of CN109301904A publication Critical patent/CN109301904A/en
Pending legal-status Critical Current

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Classifications

    • H02J7/025
    • H02J5/005
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/22Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33507Conversion 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
    • H02M3/33523Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/22Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33569Conversion 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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

Abstract

本发明公开了一种高阶复合式补偿网络的电池无线充电系统,提供电池充电过程中所需的先恒流后恒压输出,涉及电池无线充电技术,适用于电动汽车和医疗器械等电池无线充电场合。该系统包括高频全桥逆变电路、原边补偿网络、松耦合变压器、副边补偿网路、恒流‑恒压切换网络、全桥整流滤波电路,在特定频率下实现了与负载无关的恒流输出或恒压输出,通过放置在副边的恒流‑恒压切换网络实现两种模式转换,避免无线充电系统发射端与接收端之间的复杂通信,简化控制,提高可靠性,实现了电路近似零无功环流和开关器件的软开关,提高效率,减少器件应力,输出恒流与恒压值不受制于松耦合变压器参数,提高了能量传输线圈设计自由度,提高网络传输效率。

The invention discloses a battery wireless charging system with a high-order composite compensation network, which provides a constant current and then a constant voltage output required in the battery charging process, relates to a battery wireless charging technology, and is suitable for battery wireless charging such as electric vehicles and medical equipment. charging occasion. The system includes a high-frequency full-bridge inverter circuit, a primary-side compensation network, a loosely coupled transformer, a secondary-side compensation network, a constant current-constant voltage switching network, and a full-bridge rectifier filter circuit, which realizes a load-independent constant current at a specific frequency. Output or constant voltage output, the two modes are converted through the constant current-constant voltage switching network placed on the secondary side, avoiding the complicated communication between the transmitter and the receiver of the wireless charging system, simplifying the control, improving the reliability, and realizing the circuit Approximate zero reactive power circulating current and soft switching of switching devices, improve efficiency, reduce device stress, output constant current and constant voltage values are not subject to loosely coupled transformer parameters, improve the design freedom of energy transmission coils, and improve network transmission efficiency.

Description

A kind of battery wireless charging system of high-order combined type compensation network
Technical field
The invention discloses a kind of battery wireless charging systems of high-order combined type compensation network, are related to battery wireless charging Technology is suitable for the batteries wireless charging occasions such as electric car and medical instrument.
Background technique
Wireless charging technology is easy to use because not connecting electrically and mechanically between feeder ear and receiving end and safety can It leans on, therefore, there is great application prospect.Battery charging generally includes two stages of constant-current charge and constant-voltage charge, therefore, nothing Line charge electric system need to provide it to battery needed for constant current and constant voltage output.
The loosely coupled transformer coefficient of coup used in wireless charging system is low, leakage inductance value is big, in circuit unavoidably Ground generates reactive circular power flow, increases stresses of parts and loss, therefore, it is necessary to compensate its quadergy, is generally mended using capacitor Repay the quadergy of transformer leakage inductance generation.In entire battery charging process, the equivalent load of battery is in a very big model Interior variation is enclosed, required constant current or constant voltage output are realized in wide loading range and guarantees zero quadergy or zero input phase Control means used by parallactic angle (Zero Phase Angle, ZPA) are typically only capable to realize a control target.Therefore, very much Research takes into account more than two control targets using the characteristic of compensation circuit itself, for example, under particular job frequency, string string (SS) and and simultaneously (PP) realize the output constant current unrelated with load simultaneously and input ZPA, and string simultaneously (SP) and and go here and there (PS) can be with The output constant pressure unrelated with load and input ZPA are realized simultaneously, and therefore, charging system, which can work, is determining frequency state, simplified control.
At present, it has been suggested that realized by way of compound above-mentioned four kinds of Basic Topologicals after first constant current the output of constant pressure and Input ZPA.For example, two kinds of basic topologies of SS/PS or PP/SP are compound by switching switch progress, by switching switch The output and idle full compensation of constant pressure after first constant current may be implemented in control, and above two composite construction is in different operating modes Under compensating parameter and resonance frequency having the same, it is possible to reduce compensation device and switching switch, still, mode selector switch In primary side side, therefore, the control of mode switch need to carry out signal transmission, control by the communication system between transmitting terminal and receiving end Make relative complex, reliability is low.The shortcomings that based on primary side composite construction, mode selector switch is placed on secondary side by existing research, As two kinds of composite constructions of SS/SP or PP/PS need to increase additional compensation device since compensation frequency and parameter are not fully identical Constant current or constant voltage output and idle full compensation could be realized simultaneously.The above composite construction is based on four kinds of basic collocation structures, Coil design needs to consider loading condition, and coil design is restricted, and parameter designing freedom degree reduces.
Based on above-mentioned Compound Topology structure there are the problem of, existing research propose on the basis of bilateral LCC, pass through change The working frequency of charging system realizes the output and idle full compensation of constant pressure after first constant current, but existing Specification fills The working frequency of electric system, if working frequency exceeds given frequency range, this method be cannot achieve, and there is still a need for former secondary sides to communicate It realizes the change of primary side side frequency, reduces the reliability of system.
By being analyzed above it is found that the switching of secondary edge mode, approximate zero quadergy and constant current-constant pressure can be achieved at the same time at present is defeated Composite construction out, however it remains the problem of loosely coupled transformer parameter of output constant current or constant pressure is limited by loading condition, By the output of constant pressure after the first constant current of change system operating frequency realization and the idle method compensated entirely, there is also systems to work frequently The problem of rate is limited and reliability reduces.
Summary of the invention
Goal of the invention of the invention is the deficiency for above-mentioned background technique, provides a kind of high-order combined type compensation network Battery wireless charging system, by secondary edge mode change-over switch can constant frequency realize load needed for first constant current after constant pressure Output and reactive power are approximately the Sofe Switch of zero and switching device, and improve compensation network coil design freedom And system reliability, it solves existing combined compensation structure and realizes that the coil parameter design of constant current or constant pressure is limited by loading condition The technical problem that system and system operating frequency are limited.
The present invention adopts the following technical scheme that for achieving the above object
The battery wireless charging system of high-order combined type compensation network, including sequentially connected high frequency full bridge inverter, Primary side compensation network, loosely coupled transformer, secondary side compensation network, constant current-constant voltage mode handover network, full-bridge rectifier filter electricity Road.
Wherein, primary side compensation network includes: that primary side compensation inductance, primary compensation capacitor and primary side additional capacitor, secondary side are mended Repaying network includes: the secondary compensating electric capacity when compensating inductance, pair and the first secondary additional capacitor in additional capacitor, the second pair, constant current- Constant voltage mode handover network includes: first switch, second switch.
One end of primary side compensation inductance is connect with a bridge arm midpoint of high frequency full bridge inverter, and primary side compensates the another of inductance One end, primary compensation capacitor a pole of an extremely equal primary side additional capacitor be connected, another pole of primary side additional capacitor and loose coupling Close one end connection of transformer primary winding, another pole of primary compensation capacitor, loosely coupled transformer primary side winding the other end It is connected with another bridge arm midpoint of high frequency full bridge inverter.One pole of the first secondary side additional capacitor and loosely coupled transformer One end of vice-side winding connects, and the second secondary pole in additional capacitor is connect with another pole of additional capacitor when the first pair, and second Secondary another pole in additional capacitor is connected with one end of a pole of compensating electric capacity when pair and secondary side compensation inductance, secondary side compensation electricity Another pole held connects one end of second switch, the other end of secondary side compensation inductance and a bridge arm midpoint of full-bridge rectification filter circuit Connection, the other end, the other end of second switch of loosely coupled transformer vice-side winding are another with full-bridge rectification filter circuit The connection of bridge arm midpoint, first switch are attempted by between the two poles of the earth of the second additional capacitor.
Primary side compensate inductance, primary compensation capacitor, it is secondary while compensate inductance, it is secondary while compensating electric capacity parameter according toWithIt chooses, primary side additional capacitor, the first secondary side The parameter of additional capacitor according toWithIt chooses, ω is the angular frequency of system work, M For loosely coupled transformer mutual inductance, D is duty ratio, VINFor input direct-current voltage, VBATCharging voltage, I are given for batteryBATFor battery Given charging current, LPFor loosely coupled transformer primary side self-induction, LSFor loosely coupled transformer pair side self-induction, L1Electricity is compensated for primary side Sense, L2Inductance, C are compensated for secondary sidePFor primary compensation capacitor, CSFor secondary side compensating electric capacity, C1To be connected on loosely coupled transformer original The primary side additional capacitor of side winding, C2For the first secondary side additional capacitor being connected on loosely coupled transformer vice-side winding, in addition, C3For another additional capacitor in secondary side, and C3=0.5CS
The battery wireless charging system of high-order combined type compensation network is closed first switch S in the constant-current phase of charging1With Second switch S2It is closed, circuit is LCC-LCC compensation way, and charging system enters constant current mode, and output is negative with battery Carry unrelated constant current IBAT:Input impedance ZIN:
In the constant-voltage phase of battery charging, first switch S is disconnected1With second switch S2, circuit topology is LCC-S compensation, is filled Electric system enters constant pressure operating mode, exports the constant voltage V unrelated with cell loadBAT:Input impedance ZIN:
More than, IOpeakCurrent peak, V are exported for exchange sideOpeakTo exchange side output voltage peak value, R is the equivalent electricity of battery Resistance.
The present invention by adopting the above technical scheme, has the advantages that
(1) the invention proposes a kind of battery wireless charging system of high-order combined type compensation network, high-order compensation is utilized The circuit intrinsic propesties of network realize constant current output or constant voltage output under specific frequency, are opened by controlling its secondary edge mode switching Pass can realize constant voltage output after the first constant current unrelated with load directly under identical specific frequency, and working frequency can be adjusted It is whole, it is ensured that without departing from given frequency range, existing Compound Topology constant current and the adjustable parameter of constant voltage output can be overcome to set The method of setting is limited to working frequency and needs the defect of primary side communication device, improves system reliability.
(2) be under two kinds of output modes high-order compensation network wireless charging system can be not only restricted to transformer ginseng Number exports any constant pressure or constant current, improves energy transmission coil design freedom, by secondary side signal feedback control quantity compared with The switching of constant current mode and constant voltage mode can be realized in few secondary edge mode switching switch, avoids improving while complex communication The reliability of system can overcome the wireless charging system coil design based on secondary side combined type compensation network limited and reliable Property reduce defect.
(3) in entire charging process, converter input impedance is approximately purely resistive, avoids reactive circular power flow, reduces device Stress, while realizing the Sofe Switch of switching device, it improves efficiency.
Detailed description of the invention
Fig. 1 is the topology diagram of the battery wireless charging system of high-order combined type compensation network.
Fig. 2 (a), Fig. 2 (b) are the current waveform figure and voltage oscillogram of high-order Compound Topology rectification front and back respectively.
Fig. 3 is that high-order Compound Topology works under constant current mode, the v when equivalent resistance of battery is 15 Ωgate、vAB、iIN And IBATWaveform diagram.
Fig. 4 is that high-order Compound Topology works under constant current mode, the v when equivalent resistance of battery is 25 Ωgate、vAB、iIN And IBATWaveform diagram.
Fig. 5 is that high-order Compound Topology works under constant current mode, the v when equivalent resistance of battery is 33 Ωgate、vAB、iIN And IBATWaveform diagram.
Fig. 6 is that high-order Compound Topology works under constant voltage mode, the v when equivalent resistance of battery is 33 Ωgate、vAB、iIN And VBATWaveform diagram.
Fig. 7 is that high-order Compound Topology works under constant voltage mode, the v when equivalent resistance of battery is 70 Ωgate、vAB、iIN And VBATWaveform diagram.
Fig. 8 is that high-order Compound Topology works under constant voltage mode, the v when equivalent resistance of battery is 100 Ωgate、vAB、iIN And VBATWaveform diagram.
Figure label explanation: 1 is high frequency full bridge inverter, and 2 be primary side compensation network, and 3 be loosely coupled transformer, and 4 are Secondary side compensation network, 5 be constant current-constant voltage mode handover network, and 6 be full-bridge rectification filter circuit, and 7 be load battery, Q1、Q2、 Q3、Q4For the first, second, third, fourth power tube, S1、S2For the first, second switch, L1Inductance, L are compensated for primary side2For secondary side Compensate inductance, CPFor primary compensation capacitor, CSFor secondary side compensating electric capacity, C1For primary side additional capacitor, C2、C3For the first, second pair Side additional capacitor, D1、D2、D3、D4For the first, second, third, fourth diode, CfFor output filter capacitor.
Specific embodiment
The technical solution of invention is described in detail with reference to the accompanying drawing.
A kind of battery wireless charging system of high-order combined type compensation network disclosed by the invention is as shown in Figure 1, comprising: high Frequency full bridge inverter 1, primary side compensation network 2, loosely coupled transformer 3, secondary side compensation network 4, constant current-constant pressure handover network 5, Full-bridge rectification filter circuit 6.Constant current-constant voltage mode handover network 5 includes: first switch S1, second switch S2.High frequency full-bridge is inverse Power transformation road 1 includes the first power tube Q1, third power tube Q3A bridge arm and the second power tube Q for composition2, the 4th power tube Q4Another bridge arm of composition, the first power tube Q1, third power tube Q3Tie point be bridge arm midpoint A, the second power tube Q2、 4th power tube Q4Tie point be bridge arm midpoint B.Full-bridge rectification filter circuit 6 includes first diode D1, third diode D3 A bridge arm and the second diode D for composition2, the 4th diode D4Another bridge arm of composition, output filter capacitor CfIt is attempted by The output end of full-bridge rectification filter circuit 6, load battery 7 are attempted by output filter capacitor CfBetween the two poles of the earth.
In high-order Compound Topology structure shown in FIG. 1: as first switch S1With second switch S2When closure, circuit is in perseverance Current charge state, input impedance ZINForExport the constant current unrelated with cell loadLCC-LCC compensation network is high-order compensation network, and therefore, system exports under specific frequency It constant current and transformer parameter can be not only restricted to exports any constant current;As first switch S1With second switch S2When disconnection, at circuit In constant-voltage charge state, input impedance ZINForExport the constant voltage unrelated with cell loadR is battery equivalent resistance, and LCC-S compensation network is high-order compensation network, and therefore, system is specific Constant pressure is exported under frequency and can be not only restricted to transformer parameter exports any constant pressure.
When battery starts to charge, constant current charging mode is initially entered, electric current is maintained at IBAT, while voltage constantly rises, directly To reaching critical voltage VBAT, shown in current waveform such as Fig. 2 (a) of high-order Compound Topology rectification front and back.At this point, pattern switching is opened Pass movement, the constant current compensation circuit of system are switched to constant-pressure compensation circuit, and circuit enters constant voltage output mode, output voltage VBAT, Constant voltage charging phase, cell voltage holding constant, electric current are gradually reduced, and when electric current is approximately 0, terminate charging, high-order is compound Shown in voltage waveform such as Fig. 2 (b) of topology rectification front and back.
Fig. 3 to Fig. 8 demonstrates the battery wireless charging of high-order combined type compensation network by taking high-order Compound Topology structure as an example The validity of system.The loosely coupled transformer of use, coefficient of coup k are 0.2, primary side self-induction LPFor 380.2uH, secondary side self-induction LS For 184.49uH, input voltage VINIt is 10A, constant-voltage charge electricity by theoretical calculation constant-current charge electric current for 330V, duty ratio D=1 Pressure is 330V.If switching frequency is 85kHz, former and deputy side compensates inductance L1And L2Respectively 52.969uH and 50.085uH, it is former and deputy Side compensating electric capacity CPAnd CSRespectively 66.188nF and 70nF, primary side additional capacitor C1For 10.714nF, the first, second secondary side is attached C is held in power-up2And C3Respectively 26.085nF and 35nF.
Fig. 3 to Fig. 5 gives under high-order Compound Topology constant current mode, and battery equivalent impedance is respectively 15 Ω, 25 Ω and 33 Driving signal v when Ωgate, bridge arm voltage vAB, input current iINWith output DC current IBATWaveform.It can from figure Out, when the equivalent resistance of battery changes to 33 Ω from 15 Ω, output electric current keeps 10A substantially, does not change with load.Input Electric current iINWith bridge arm voltage vABIt is substantially in phase, quadergy is effectively reduced, input current slightly lags behind bridge arm voltage, is convenient for Switch mosfet pipe realizes zero voltage switch, reduces switching loss.
Fig. 6 to Fig. 8 gives under high-order Compound Topology constant voltage mode, and battery equivalent impedance is respectively 33 Ω, 70 Ω and 100 Driving signal v when Ωgate, bridge arm voltage vAB, input current iINWith output DC voltage VBATWaveform.When on cell voltage When being raised to 330V, the charge mode of battery becomes constant-voltage charge from constant-current charge.It can be seen from the figure that the equivalent resistance of battery When changing to 100 Ω from 33 Ω, output voltage is basically stable at 330V, has good constant-voltage characteristic.Input current iINAnd bridge arm Voltage vABIt is substantially in phase, quadergy is effectively reduced, input current slightly lags behind bridge arm voltage, realizes convenient for switch mosfet pipe Zero voltage switch reduces switching loss.

Claims (2)

1. a kind of battery wireless charging system of high-order combined type compensation network, comprising: high frequency full bridge inverter (1), primary side Compensation network (2), loosely coupled transformer (3), secondary side compensation network (4), constant current-constant voltage mode handover network (5), full-bridge rectification Filter circuit (6), the primary side compensation network (2) include: primary compensation capacitor, primary side compensation inductance and primary side additional electrical Hold, the secondary compensating electric capacity when compensation network (4) includes: secondary, secondary additional capacitor and capacitance when compensating inductance, the first pair are The secondary additional capacitor when the second of compensating electric capacity half is secondary, constant current-constant voltage mode handover network (5) includes first switch and second Switch;
One end of the primary side compensation inductance is connect with a bridge arm midpoint of high frequency full bridge inverter (1), and primary side compensates inductance The other end, primary compensation capacitor one be extremely connected with a pole of primary side additional capacitor, another pole of primary side additional capacitor It is connect with one end of loosely coupled transformer (3) primary side winding, another pole of primary compensation capacitor, loosely coupled transformer (3) primary side The other end of winding is connected with another bridge arm midpoint of high frequency full bridge inverter (1), and the one of the first secondary side additional capacitor Pole is connect with one end of loosely coupled transformer (3) vice-side winding, the second secondary pole in additional capacitor and additional electrical when the first pair Another pole held connects, and a pole and secondary side for the second secondary compensating electric capacity in another pole and the pair of additional capacitor compensates the one of inductance End is connected, and another pole of secondary side compensating electric capacity connects one end of second switch, the other end and full-bridge rectification of secondary side compensation inductance One bridge arm midpoint of filter circuit (6) connects, the other end of loosely coupled transformer vice-side winding, second switch the other end with Another bridge arm midpoint of full-bridge rectification filter circuit (6) connects, and first switch is attempted by between the two poles of the earth of the second additional capacitor;
The inductance value L of primary side compensation inductance1, primary compensation capacitor capacitance CP, secondary side compensation inductance inductance value L2, secondary side compensation electricity The capacitance C of appearanceSAccording to It chooses, primary side is attached It is powered on the capacitance C held1, the first secondary side additional capacitor capacitance C2According toWithChoosing It takes, ω is the angular frequency of system work, and M is the mutual inductance value of loosely coupled transformer, and D is duty ratio, VINFor input direct-current voltage, VBATCharging voltage, I are given for batteryBATCharging current, L are given for batteryPFor the inductance value of loosely coupled transformer primary side self-induction, LS For the inductance value of loosely coupled transformer pair side self-induction, the capacitance C of the second secondary side additional capacitor3For C3=0.5CS
2. a kind of battery wireless charging system of high-order combined type compensation network according to claim 1, it is characterised in that:
When first switch and the second switch is closed, system works under LCC-LCC constant current mode, input impedance ZINAre as follows:In purely resistive, the battery of output gives charging current IBATAre as follows:
When first switch and the second switch disconnects, system works under LCC-S constant voltage mode, input impedance ZINAre as follows:In purely resistive, the battery of output gives charging voltage VBATAre as follows:
Wherein, R is battery equivalent resistance.
CN201811300716.8A 2018-11-02 2018-11-02 A wireless battery charging system with high-order composite compensation network Pending CN109301904A (en)

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CN111277223A (en) * 2020-03-09 2020-06-12 东南大学 High-order coupling network with interference suppression and application thereof
CN111478458A (en) * 2020-05-20 2020-07-31 温州大学 Wireless power transmission system and constant-current and constant-voltage control method thereof
CN112366777A (en) * 2020-11-05 2021-02-12 中国科学院电工研究所 Constant-current constant-voltage induction type wireless charging system based on secondary variable structure
CN112421734A (en) * 2020-12-02 2021-02-26 青岛大学 Single-stage high-order compensation constant-current constant-voltage wireless charging device and method
CN112448485A (en) * 2020-11-03 2021-03-05 王万辉 Wireless charging power supply manager
CN112721671A (en) * 2021-01-15 2021-04-30 四川电力设计咨询有限责任公司 Primary and secondary side circuits of electric field coupling type wireless charging system and charging method
CN112865338A (en) * 2021-01-26 2021-05-28 西安工业大学 Constant-current constant-voltage anti-offset output wireless charging system and charging method
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