CN107154683A - A kind of inductively coupled power transfer device and control method with pull-up auxiliary switch - Google Patents

A kind of inductively coupled power transfer device and control method with pull-up auxiliary switch Download PDF

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Publication number
CN107154683A
CN107154683A CN201710399486.4A CN201710399486A CN107154683A CN 107154683 A CN107154683 A CN 107154683A CN 201710399486 A CN201710399486 A CN 201710399486A CN 107154683 A CN107154683 A CN 107154683A
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voltage
circuit
main switch
control
signal
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CN201710399486.4A
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CN107154683B (en
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王春芳
魏芝浩
李震
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Qingdao University
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Qingdao University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • 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
    • H02M7/4815—Resonant converters
    • 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 belongs to electroporation field, it is related to a kind of inductively coupled power transfer device with pull-up auxiliary switch and control method, increase by one group of pull-up auxiliary switch branch road with LC resonance single-tube contravariant bipolarity inverter topologies in existing ICPT devices, an auxiliary switch is included in the branch road, main switch is identical with the switching frequency of auxiliary switch, Sofe Switch control can be achieved, and reliability is improved without straight-through problem between two pipes；In the case where keeping original circuit advantage, the voltage for bearing switching tube two ends is reduced to original 2/3, make device using MOS transistor as switching tube, switching frequency is up to more than 83kHz, simultaneously because auxiliary switch ON time is short, low in energy consumption, technical scheme is provided further to reduce the volume and weight of ICPT devices, reducing cost.

Description

A kind of inductively coupled power transfer device and control method with pull-up auxiliary switch
Technical field：
The invention belongs to electroporation field, it is related to a kind of inductively coupled power transfer device with pull-up auxiliary switch And control method, the transmission of inductively electric energy is used for using auxiliary switch branch road.
Background technology：
At present, the master of inductively coupled power transfer (Inductively CoupledPowerTransfer, ICPT) device Circuit topology uses full-bridge voltage type inverter circuit, half-bridge LLC voltage-type resonance inversion circuits and LC resonance single-tube contravariants mostly Bipolarity inverter circuit, first two circuit topology has that circuit structure is relative complex, and power supply cost is of a relatively high, above and below bridge arm Switching tube easily causes the problems such as leading directly to and burn out；The latter is a kind of novel radio electric energy transmission topology, it have circuit it is simple, Cost is low, efficiency of transmission is high, no-voltage can be achieved opens the advantages of being controlled with zero voltage turn-off, but there is also some shortcomings, When device input voltage is 220VacDuring/50Hz alternating currents, the voltage that switching tube two ends are born in its running up to 1200V More than, cause switching tube to select pressure-resistant higher isolated-gate field effect transistor (IGFET) (IGBT), in order to reduce ICPT devices Volume and weight, national Specification switching frequency need to reach more than 83kHz, and when IGBT switching frequency be more than 25kHz with Afterwards, its loss can increase with the increase of switching frequency, and constraining the volume and cost of ICPT devices further reduces, unfavorable In the application of this novel I CPT devices topology.Therefore, design a kind of new adaptive circuit and its control method has very much Application and development is worth.
The content of the invention：
It is bipolar with LC resonance single-tube contravariants in existing ICPT devices it is an object of the invention to overcome the shortcoming of prior art Property inverter topology in increase by one group of pull-up auxiliary switch branch road, comprising auxiliary switch in the branch road, main switch It is identical with the switching frequency of auxiliary switch, Sofe Switch control can be achieved, and without straight-through problem between two pipes, improve reliable Property；In the case where keeping original circuit advantage, the voltage for bearing switching tube two ends is reduced to original 2/3, adopts device With MOS transistor (MOSFET) as switching tube, switching frequency is up to more than 83kHz, while because auxiliary switch is led The logical time is short, low in energy consumption, and technical scheme is provided further to reduce the volume and weight of ICPT devices, reducing cost.
To achieve these goals, the ICPT apparatus main bodies structure of the present invention with pull-up auxiliary switch includes the One rectifier bridge, L1C1It is filter circuit, main switch, the first diode, pull-up auxiliary switch branch road, resonant coupling circuit, second whole Flow bridge, the second filter capacitor, equivalent load, primary-side-control circuit and secondary control circuit, 220VacThrough the first rectifier bridge, L1C1 Be converted into DC voltage after filter circuit, main switch, the first diode and pull-up auxiliary switch branch road by DC inverter into High-frequency alternating current, high-frequency alternating current is applied to secondary electricity in the two ends of primary side inductance in resonant coupling circuit, resonant coupling circuit Sense two ends induce voltage, and secondary inductance both end voltage is converted into direct current after the second rectifier bridge, the second filter capacitor, for etc. Imitate load supplying；Industrial-frequency alternating current is carried out rectification, L by the first rectifier bridge1C1Filter circuit is by filter inductance and the first filter capacitor It is composed in series, for power frequency filtering；Main switch, the first diode and pull-up auxiliary switch branch road are used to realize electric energy inversion, First diode is the anti-paralleled diode of main switch；Auxiliary switch, the second diode and clamp capacitor are former according to electricity Reason composition pull-up auxiliary switch branch road, the voltage for reducing main switch drain-source two ends, wherein the second diode is opened for auxiliary Close the anti-paralleled diode of pipe；Auxiliary switch is identical with main switch switching frequency, and auxiliary switch and main switch are led Logical to there is dead band, the ON time of auxiliary switch is short, and conduction loss is small；Resonant coupling circuit is by primary compensation capacitor, primary side Screen layer, primary side inductance, secondary inductance, secondary screen layer, the first secondary compensating electric capacity or the electrical connection of the second secondary compensating electric capacity Composition, for energy to be delivered into secondary from primary side, so as to be powered for equivalent load, wherein between primary side inductance and secondary inductance Mutual inductance change with the transmission range between primary side inductance and secondary inductance；Primary side screen layer and secondary screen layer are used to improve The device coefficient of coup and efficiency of transmission, can weaken the electromagnetic interference of primary side inductance and secondary inductance to former and deputy side circuit board；First Secondary compensating electric capacity and the second secondary compensating electric capacity can switch mutually, if switching to the first secondary compensating electric capacity, and primary side is mended Repay electric capacity and secondary series connection (PS) collocation structure output in parallel of the first secondary compensating electric capacity composition primary side shows as constant pressure source, be applicable In the equipment for needing constant pressure to power, if switching to the second secondary compensating electric capacity, primary compensation capacitor and the second secondary compensation electricity Hold (PP) collocation structure output in parallel of composition primary side secondary in parallel and show as constant-current source, it is adaptable to need the equipment of constant current-supplying； High-frequency alternating current is carried out rectification by the second rectifier bridge, and the second filter capacitor is used for High frequency filter, equivalent load be capacitive load or Inductive load；Primary-side-control circuit includes the first single chip machine controlling circuit, drive circuit, the first accessory power supply, the first channel radio Believe circuit, first voltage detection circuit, remote control and second voltage detection circuit, control main switch and auxiliary switch are realized No-voltage is open-minded, makes whole device output voltage stabilization or outputting current steadily, wherein, the first single chip machine controlling circuit is according to The voltage signal for the main switch that signal of communication that one radio communication circuit is received, first voltage detection electric circuit inspection are arrived and the The voltage signal for the clamp capacitor that two voltage detecting circuits are detected, exports the control letter of main switch and auxiliary switch respectively Number, control signal driving main switch and auxiliary switch after drive circuit isolation amplification；First accessory power supply is first single Piece machine controls circuit and drive circuitry；First radio communication circuit receives the feedback signal that the second radio communication circuit is sent The control signal sent with remote control, the first radio communication circuit can be to remote control emitter operating state signal；First electricity The voltage at pressure detection electric circuit inspection main switch drain-source two ends；Remote control is sent according to the first radio communication circuit received Whether plant running status signal, display device output voltage, output current and realize that no-voltage is open-minded, and remote control is to the first nothing Line telecommunication circuit emissioning controling signal, makes the first single chip machine controlling circuit select Isobarically Control or current constant control；Second voltage is examined The voltage at slowdown monitoring circuit detection clamp capacitor two ends, when detecting the voltage increase at clamp capacitor two ends, the control of the first single-chip microcomputer The control signal of auxiliary switch is changed into high level by circuit, and auxiliary switch realizes that no-voltage is open-minded, when clamp capacitor two ends Voltage increase when, primary side inductance by the second diode be clamp capacitor charge, the second diode current flow, auxiliary switch leakage The voltage at source two ends is 0, and auxiliary switch realizes that no-voltage is open-minded；Secondary controls circuit by sample circuit, second singlechip control Circuit processed, the second accessory power supply and the second radio communication circuit composition, for giving primary-side-control circuit transmission feedback signal, sampling The output voltage and output current of circuit checker；Second singlechip controls circuit according to the letter of the sample circuit received Number, the second radio communication circuit of control launches feedback signal to the first radio communication circuit；Second accessory power supply is the second monolithic Machine control circuit is powered.
The present invention realizes that the control process of the ICPT devices with pull-up auxiliary switch comprises the following steps：
(1), first, if load needs constant pressure to power, first is switched to according to load selection control mode and collocation structure Secondary compensating electric capacity, i.e., using primary side secondary series connection (PS) collocation structure in parallel, select constant pressure control method；If load needs perseverance Stream power supply, then switch to the second secondary compensating electric capacity, i.e., using primary side secondary in parallel (PP) collocation structure in parallel, select constant current control Method processed；If neither selection constant pressure is powered, constant current-supplying is not also selected, then whole device is standby, until selection power supply mode；
(2) if, selection constant pressure power, first using pulse width modulation (PWM) soft start, give original switching frequency, protect Hold switching frequency constant, ON time is gradually increased to setting value, output voltage reaches setting voltage, when device output voltage not When stable, regulated output voltage is controlled by pulse frequency modulated (PFM)；Sample circuit sends out the output voltage signal detected Second singlechip control circuit is given, second singlechip controls circuit according to the change of output voltage, passes through the second radio communication The first radio communication circuit that circuit is sent to primary-side-control circuit in different control signals, primary-side-control circuit receives The signal that two radio communication circuits are sent, then pass to the first single chip machine controlling circuit, the first single chip machine controlling circuit adjustment dress The switching frequency put；If output voltage becomes big, second singlechip controls circuit by the second radio communication circuit to primary-side-control Circuit sends the signal of increase switching frequency；If output voltage reduces, second singlechip control circuit passes through the second radio communication Circuit sends the signal for reducing switching frequency to primary-side-control circuit, so that the output voltage of stabilising arrangement；When second voltage inspection Slowdown monitoring circuit detects the voltage increase at clamp capacitor two ends, and the first single chip machine controlling circuit becomes the control signal of auxiliary switch For high level, auxiliary switch realizes that no-voltage is open-minded, then detects whether main switch is that no-voltage is open-minded, if main switch It is not that no-voltage is open-minded, realizes that no-voltage is open-minded by PWM controls, when the drive signal of main switch from low level is changed into high electricity Usually, the voltage at first voltage detection electric circuit inspection main switch drain-source two ends, if the voltage at main switch drain-source two ends is not 0, that is, it is not carried out that no-voltage is open-minded, then the first single chip machine controlling circuit reduces the dutycycle of main switch；If main switch leaks The voltage at source two ends is 0, that is, realizes that no-voltage is open-minded, then the dutycycle of main switch is constant；When main switch realizes no-voltage After opening, whether judgment means shut down, if providing stopping signal, device is stopped；If not providing stopping signal, again Output voltage is detected, is repeated the above steps；
(3) if, selection constant current-supplying, first using PWM soft starts, give original switching frequency, maintained switch frequency is constant, ON time is gradually increased to setting value, and output current reaches setting electric current, when device output current is unstable, passes through PFM The output current signal detected is sent to second singlechip control circuit, second by the stable output current of control, sample circuit Single chip machine controlling circuit changes according to the difference of output current, is sent not to primary-side-control circuit by the second radio communication circuit The first radio communication circuit in same control signal, primary-side-control circuit receives the letter that the second radio communication circuit is sent Number, then pass to the first single chip machine controlling circuit, the switching frequency of the first single chip machine controlling circuit adjusting apparatus, if output current Become big, second singlechip control circuit can be sent by the second radio communication circuit to primary-side-control circuit increases switching frequency Signal；If output current reduces, second singlechip control circuit can be sent out by the second radio communication circuit to primary-side-control circuit Go out to reduce the signal of switching frequency, the output current of stabilising arrangement；When second voltage detects electric circuit inspection to clamp capacitor two ends Voltage increase when, the control signal of auxiliary switch is changed into high level by the first single chip machine controlling circuit, and auxiliary switch is real Existing no-voltage is open-minded, then detects whether main switch is that no-voltage is open-minded, and main switch passes through if not no-voltage is open-minded PWM controls realize that no-voltage is open-minded；When the drive signal of main switch is changed into high level from low level, first voltage detection electricity The voltage at road detection main switch drain-source two ends, if the voltage at main switch drain-source two ends is not 0, that is, is not carried out no-voltage and opens Logical, then the first single chip machine controlling circuit reduces the dutycycle of main switch；If the voltage at main switch drain-source two ends is 0, realize No-voltage is open-minded, then the dutycycle of main switch is constant；After main switch realizes that no-voltage is opened, whether judgment means stop Machine, if providing stopping signal, device is stopped；If not providing stopping signal, output current is detected again, is repeated above-mentioned Step；Whole device is by the control mode regulated output voltage or output current of frequency conversion+variable duty cycle, while making main switch Realize that no-voltage is open-minded with auxiliary switch, reach the purpose of inductively coupled power transfer regulation and control.
The present invention compared with prior art, using the ICPT devices with pull-up auxiliary switch, with circuit structure it is simple, Main switch and auxiliary switch have identical switching frequency, are easy to control and can all realize Zero-voltage soft switch, auxiliary The features such as service time of switching tube is short, increased auxiliary switch ON time is short and can realize Sofe Switch control, makes whole The increased loss of device is smaller；The voltage reduction by 1/3 that increased pull-up auxiliary switch branch road bears main switch, so that main Switching tube and auxiliary switch can be realized using the MOSFET that price is low, switching frequency is up to more than 83kHz so that switch frequency Rate meets national standard, and the volume of loosely coupled transformer also accordingly reduces, and is conducive to application；Accounted for using frequency conversion+change Empty ratio is controlled, and can realize that no-voltage is open-minded, regulated output voltage or output current, and substantially increase whole device can By property, be conducive to application；Different collocation structure and corresponding PWM and PFM control are used according to different loads, If load needs constant pressure to power, the first secondary compensating electric capacity is switched to, i.e., using PS collocation structure, while using constant pressure control Method processed；If load needs constant current-supplying, the second secondary compensating electric capacity is switched to, i.e., using PP collocation structure, is adopted simultaneously Use constant current control method.
Brief description of the drawings：
Fig. 1 is agent structure circuit theory schematic diagram of the invention.
Fig. 2 realizes the process flow diagram of the ICPT devices control with pull-up auxiliary switch for the present invention.
Fig. 3 is the work electric signal waveform figure of the present invention, and wherein Ugs1 is main switch Q1Driving voltage, supplemented by Ugs2 Help switching tube Q2Driving voltage, Uds1 be main switch Q1The voltage at drain-source two ends, Uds2 is auxiliary switch Q2Drain-source two ends Voltage, Up be primary compensation capacitor CpThe voltage at two ends, Ip is primary inductor LpElectric current, Uc be clamp capacitor CcTwo ends Voltage.
Embodiment：
Technical scheme is described in more detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
The ICPT apparatus main bodies structure with pull-up auxiliary switch that the present embodiment is related to includes the first rectifier bridge 1, L1C1Filter Wave circuit 2, main switch Q1, the first diode DQ1, pull-up auxiliary switch branch road 3, resonant coupling circuit 4, the second rectifier bridge 5, Second filter capacitor C2, equivalent load Z, primary-side-control circuit 6 and secondary control circuit 7,220VacThrough the first rectifier bridge 1, L1C1 DC voltage, main switch Q are converted into after filter circuit 21, the first diode DQ1With pull-up auxiliary switch branch road 3 by direct current High-frequency alternating current is reverse into, high-frequency alternating current is applied to primary inductor L in resonant coupling circuit 4pTwo ends, resonant coupling circuit Secondary inductance L in 4sTwo ends induce voltage, secondary inductance LsBoth end voltage is through the second rectifier bridge 5, the second filter capacitor C2After turn Change direct current into, be that equivalent load Z powers；Industrial-frequency alternating current is carried out rectification, L by the first rectifier bridge 11C1Filter circuit 2 is by filtering Inductance L1With the first filter capacitor C1It is composed in series, for power frequency filtering；Main switch Q1, the first diode DQ1With pull-up auxiliary Switching branches 3 are used to realize electric energy inversion, the first diode DQ1For main switch Q1Anti-paralleled diode；Auxiliary switch Q2, the second diode DQ2With clamp capacitor CcAccording to electrical principles composition pull-up auxiliary switch branch road 3, for reducing main switch Q1The voltage at drain-source two ends, wherein the second diode DQ2For auxiliary switch Q2Anti-paralleled diode；Auxiliary switch Q2And master Switching tube Q1Switching frequency is identical, auxiliary switch Q2With main switch Q1Conducting there is dead band, auxiliary switch Q2Conducting Time is short, and conduction loss is small；Resonant coupling circuit 4 is by primary compensation capacitor Cp, primary side screen layer Sp, primary inductor Lp, secondary electricity Feel Ls, secondary screen layer Ss, the first secondary compensating electric capacity CsOr the second secondary compensating electric capacity CtElectrical connection composition, for by energy Secondary is delivered to from primary side, so that powered for equivalent load Z, wherein, M is primary inductor LpWith secondary inductance LsBetween mutual inductance, M is with LpAnd LsBetween transmission range and change；Primary side screen layer SpWith secondary screen layer SsFor improve the device coefficient of coup and Efficiency of transmission, can weaken primary inductor LpWith secondary inductance LsTo the electromagnetic interference of former and deputy side circuit board；First secondary compensation electricity Hold CsWith the second secondary compensating electric capacity CtIt can switch mutually, if switching to the first secondary compensating electric capacity Cs, then primary compensation capacitor CpWith the first secondary compensating electric capacity CsComposition PS collocation structure outputs show as constant pressure source, it is adaptable to the equipment for needing constant pressure to power, If switching to the second secondary compensating electric capacity Ct, then primary compensation capacitor CpWith the second secondary compensating electric capacity CtConstitute PP collocation structures Output shows as constant-current source, it is adaptable to need the equipment of constant current-supplying；High-frequency alternating current is carried out rectification by the second rectifier bridge 5, the Two filter capacitor C2For High frequency filter, equivalent load Z is capacitive load or inductive load；Primary-side-control circuit 6 includes first Single chip machine controlling circuit 8, drive circuit 9, the first accessory power supply 10, the first radio communication circuit 11, first voltage detection circuit 12nd, remote control 13 and second voltage detection circuit 14, control main switch Q1With auxiliary switch Q2Realize that no-voltage is open-minded, make Whole device output voltage stabilization or outputting current steadily, wherein, the first single chip machine controlling circuit 8 is according to the first radio communication electricity The main switch Q that signal of communication that road 11 is received, first voltage detection circuit 12 are detected1Voltage signal and second voltage The clamp capacitor C that detection circuit 14 is detectedcVoltage signal, main switch Q is exported respectively1With auxiliary switch Q2Control Signal, control signal driving main switch Q after the isolation amplification of drive circuit 91With auxiliary switch Q2；First accessory power supply 10 It is that the first single chip machine controlling circuit 8 and drive circuit 9 are powered；First radio communication circuit 11 receives the second radio communication circuit 18 The control signal that the feedback signal and remote control 13 sent is sent, the first radio communication circuit 11 can be to the emitter of remote control 13 Operating state signal；The first voltage detection detection main switch of circuit 12 Q1The voltage at drain-source two ends；Remote control 13 is according to reception To the plant running status signal that sends of the first radio communication circuit 11, display device output voltage, output current and whether Realize that no-voltage is open-minded, remote control 13 makes the first single chip machine controlling circuit 8 to the emissioning controling signal of the first radio communication circuit 11 Select Isobarically Control or current constant control；The second voltage detection detection clamp capacitor of circuit 14 CcThe voltage at two ends, when detecting pincers Position electric capacity CcDuring the voltage increase at two ends, the first single chip machine controlling circuit 8 is auxiliary switch Q2Control signal be changed into high electricity It is flat, auxiliary switch Q2Realize that no-voltage is open-minded, as clamp capacitor CcDuring the voltage increase at two ends, primary inductor LpPass through second Diode DQ2For clamp capacitor CcCharging, the second diode DQ2Conducting, auxiliary switch Q2The voltage at drain-source two ends is 0, auxiliary Switching tube Q2Realize that no-voltage is open-minded；Secondary controls circuit 7 to control circuit 16, second auxiliary by sample circuit 15, second singlechip The radio communication circuit 18 of power supply 17 and second is helped to constitute, for launching feedback signal to primary-side-control circuit 6, sample circuit 15 is examined Survey the output voltage and output current of device；Second singlechip controls circuit 16 according to the signal of the sample circuit 15 received, The second radio communication circuit 18 is controlled to launch feedback signal to the first radio communication circuit 11；Second accessory power supply 17 is second single Piece machine control circuit 16 is powered.
The present embodiment realizes that the control process of the ICPT devices with pull-up auxiliary switch comprises the following steps：
(1), first, if load needs constant pressure to power, first is switched to according to load selection control mode and collocation structure Secondary compensating electric capacity Cs, i.e., using PS collocation structure, select constant pressure control method；If load needs constant current-supplying, switch Into the second secondary compensating electric capacity Ct, i.e., using PP collocation structure, select constant current control method；If neither selection constant pressure is powered, Also constant current-supplying is not selected, then whole device is standby, until selection power supply mode；
(2) if, selection constant pressure power, first using PWM soft starts, give original switching frequency, maintained switch frequency is constant, ON time is gradually increased to setting value, and output voltage reaches setting voltage, when device output voltage is unstable, passes through PFM Control regulated output voltage；The output voltage signal detected is sent to second singlechip control circuit 16 by sample circuit 15, Second singlechip controls circuit 16 according to the change of output voltage, by the second radio communication circuit 18 to primary-side-control circuit 6 The first radio communication circuit 11 sent in different control signals, primary-side-control circuit 6 receives the second radio communication circuit 18 signals sent, then pass to the first single chip machine controlling circuit 8, the switch frequency of the adjusting apparatus of the first single chip machine controlling circuit 8 Rate；If output voltage becomes big, second singlechip control circuit 16 is sent out by the second radio communication circuit 18 to primary-side-control circuit 6 Go out to increase the signal of switching frequency；If output voltage reduces, second singlechip control circuit 16 passes through the second radio communication circuit 18 send the signal for reducing switching frequency to primary-side-control circuit 6, so that the output voltage of stabilising arrangement；When second voltage detection Circuit 14 detects clamp capacitor CcThe voltage increase at two ends, the first single chip machine controlling circuit 8 is auxiliary switch Q2Control letter Number it is changed into high level, auxiliary switch Q2Realize that no-voltage is open-minded, then detect main switch Q1Whether it is that no-voltage is open-minded, it is main Switching tube Q1If not no-voltage is open-minded, realize that no-voltage is open-minded by PWM controls, as main switch Q1Drive signal by low When level is changed into high level, the first voltage detection detection main switch of circuit 12 Q1The voltage at drain-source two ends, if main switch Q1Leakage The voltage at source two ends is not 0, that is, it is open-minded to be not carried out no-voltage, then the first single chip machine controlling circuit 8 reduces main switch Q1's Dutycycle；If main switch Q1The voltage at drain-source two ends is 0, that is, realizes that no-voltage is open-minded, then main switch Q1Dutycycle not Become；As main switch Q1After realizing that no-voltage is opened, whether judgment means shut down, if providing stopping signal, and device stops work Make；If not providing stopping signal, output voltage is detected again, is repeated the above steps；
(3) if, selection constant current-supplying, first using PWM soft starts, give original switching frequency, maintained switch frequency is constant, ON time is gradually increased to setting value, and output current reaches setting electric current；When device output current is unstable, pass through PFM The stable output current of control, 15 output current signals detected of sample circuit are sent to second singlechip control circuit 16, Second singlechip controls circuit 16 according to the change of output current, by the second radio communication circuit 18 to primary-side-control circuit 6 The first radio communication circuit 11 sent in different control signals, primary-side-control circuit 6 receives the second radio communication circuit 18 signals sent, then pass to the first single chip machine controlling circuit 8, the switch frequency of the adjusting apparatus of the first single chip machine controlling circuit 8 Rate, if output current becomes big, second singlechip control circuit 16 is sent out by the second radio communication circuit 18 to primary-side-control circuit 6 Go out to increase the signal of switching frequency；If output current reduces, second singlechip control circuit 16 can pass through the second radio communication electricity Road 18 sends the signal for reducing switching frequency, the output current of stabilising arrangement, when second voltage detects electricity to primary-side-control circuit 6 Road 14 detects clamp capacitor CcThe voltage increase at two ends, the first single chip machine controlling circuit 8 is auxiliary switch Q2Control signal It is changed into high level, auxiliary switch Q2Realize that no-voltage is open-minded, then detect main switch Q1Whether it is that no-voltage is open-minded, master opens Close pipe Q1If not no-voltage is open-minded, realize that no-voltage is open-minded by PWM controls, as main switch Q1Drive signal by low electricity It is flat when being changed into high level, the first voltage detection detection main switch of circuit 12 Q1The voltage at drain-source two ends, if main switch Q1Drain-source The voltage at two ends is not 0, that is, it is open-minded to be not carried out no-voltage, then the first single chip machine controlling circuit 8 reduces main switch Q1Account for Sky ratio；If main switch Q1The voltage at drain-source two ends is 0, that is, realizes that no-voltage is open-minded, then main switch Q1Dutycycle it is constant； As main switch Q1After realizing that no-voltage is opened, whether judgment means shut down, if providing stopping signal, device is stopped； If not providing stopping signal, output current is detected again, is repeated the above steps；Whole device passes through frequency conversion+variable duty cycle Control mode regulated output voltage or output current, while making main switch Q1With auxiliary switch Q2Realize that no-voltage is open-minded, reach The purpose regulated and controled to inductively coupled power transfer.
The ICPT devices course of work with pull-up auxiliary switch that the present embodiment is related to was included with the next stage：
The t0-t1 periods：At t0 moment, main switch Q1Driving voltage Ugs1 be changed into high level, now primary inductor Lp's Electric current is negative, main switch Q1It is not turned on, primary inductor LpPass through the first diode DQ1With the first filter capacitor C1Afterflow, master opens Close pipe Q1The voltage at drain-source two ends is 0, to t1 moment, primary inductor LpElectric current be changed into 0, main switch Q1Conducting, main switch Q1Realize that no-voltage is open-minded；
The t1-t2 periods：Input voltage is primary inductor LpCharging, primary inductor LpElectric current gradually increase, to the t2 moment, Main switch Q1Driving voltage Ugs1 be changed into low level, main switch Q1Shut-off；
The t2-t3 periods：Primary compensation capacitor CpFor primary inductor LpCharging, primary inductor LpElectric current continue increase, to t3 Moment, primary compensation capacitor CpVoltage be reduced to 0, primary inductor LpElectric current increase to maximum；
The t3-t4 periods：Primary inductor LpIt is reversed primary compensation capacitor CpCharging, primary compensation capacitor CpVoltage reversal Increase, primary compensation capacitor CpVoltage be less than clamp capacitor CcVoltage, the second diode DQ2Reversely cut-off, to the t4 moment, Primary compensation capacitor CpVoltage be more than clamp capacitor CcVoltage, the second diode DQ2Conducting；
The t4-t5 periods：Primary inductor LpIt is simultaneously primary compensation capacitor CpWith clamp capacitor CcCharging, clamp capacitor Cc's Voltage gradually increases, to t5 moment, auxiliary switch Q2Driving voltage Ugs2 be changed into high level, but primary inductor LpElectric current Still it is just auxiliary switch Q2It is not turned on；
The t5-t6 periods：Primary inductor LpContinue as primary compensation capacitor CpWith clamp capacitor CcCharging, the second diode DQ2 Conducting, auxiliary switch Q2The voltage at drain-source two ends is 0, to t6 moment, primary inductor LpElectric current drop to 0, primary side compensation electricity Hold CpVoltage reversal increase to maximum, while clamp capacitor CcVoltage increase to maximum, auxiliary switch Q2Conducting, auxiliary Switching tube Q2Realize that no-voltage is open-minded；
The t6-t7 periods：Primary compensation capacitor CpWith clamp capacitor CcIt is simultaneously primary inductor LpReverse charging, to the t7 moment, Auxiliary switch Q2Driving voltage Ugs2 be changed into low level, auxiliary switch Q2Shut-off, clamp capacitor CcStop as primary side inductance LpCharging；
The t7-t8 periods：Primary compensation capacitor CpVoltage reduction, primary inductor LpElectric current reduce, to t8 moment, primary side Compensating electric capacity CpVoltage be changed into 0；
The t8-t9 periods：Primary inductor LpFor primary compensation capacitor CpReverse charging, primary compensation capacitor CpVoltage gradually Increase, to t9 moment, primary compensation capacitor CpVoltage increase to and the first filter capacitor C1Voltage it is equal；
The t9-t10 periods：Primary inductor LpPass through the first diode DQ1With the first filter capacitor C1Afterflow, to the t10 moment, Main switch Q1Driving voltage Ugs1 be changed into high level, now primary inductor LpElectric current be negative, main switch Q1It is not turned on.

Claims (2)

1. a kind of inductively coupled power transfer device with pull-up auxiliary switch, it is characterised in that：Used in existing ICPT devices Increase by one group of pull-up auxiliary switch branch road in LC resonance single-tube contravariant bipolarity inverter topologies, it is whole that concrete structure includes first Flow bridge, L1C1Filter circuit, main switch, the first diode, pull-up auxiliary switch branch road, resonant coupling circuit, the second rectification Bridge, the second filter capacitor, equivalent load, primary-side-control circuit and secondary control circuit, 220VacThrough the first rectifier bridge, L1C1Filter It is converted into DC voltage after wave circuit, main switch, the first diode and pull-up auxiliary switch branch road are by DC inverter into height Frequency alternating current, high-frequency alternating current is applied to secondary inductance in the two ends of primary side inductance in resonant coupling circuit, resonant coupling circuit Two ends induce voltage, and secondary inductance both end voltage is converted into direct current after the second rectifier bridge, the second filter capacitor, is equivalent Load supplying；Industrial-frequency alternating current is carried out rectification, L by the first rectifier bridge1C1Filter circuit is by filter inductance and the first filter capacitor string Joint group is into for power frequency filtering；Main switch, the first diode and pull-up auxiliary switch branch road are used to realize electric energy inversion, the One diode is the anti-paralleled diode of main switch；Auxiliary switch, the second diode and clamp capacitor are according to electrical principles Composition pull-up auxiliary switch branch road, the voltage for reducing main switch drain-source two ends, wherein the second diode is auxiliary switch The anti-paralleled diode of pipe；Auxiliary switch is identical with main switch switching frequency, the conducting of auxiliary switch and main switch There is dead band, the ON time of auxiliary switch is short, and conduction loss is small；Resonant coupling circuit is by primary compensation capacitor, primary side screen Cover layer, primary side inductance, secondary inductance, secondary screen layer, the first secondary compensating electric capacity or the second secondary compensating electric capacity electrical connection group Into for energy to be delivered into secondary from primary side, so as to be powered for equivalent load, wherein between primary side inductance and secondary inductance Mutual inductance changes with the transmission range between primary side inductance and secondary inductance；Primary side screen layer and secondary screen layer, which are used to improve, to be filled The coefficient of coup and efficiency of transmission are put, the electromagnetic interference of primary side inductance and secondary inductance to former and deputy side circuit board can be weakened；First is secondary Side compensating electric capacity and the second secondary compensating electric capacity can switch mutually, if switching to the first secondary compensating electric capacity, primary side compensation Electric capacity and the first secondary compensating electric capacity composition primary side secondary series compensation structure output in parallel show as constant pressure source, it is adaptable to need The equipment that constant pressure is powered, if switching to the second secondary compensating electric capacity, primary compensation capacitor and the second secondary compensating electric capacity composition Primary side parallel connection secondary shunt compensation structure output shows as constant-current source, it is adaptable to need the equipment of constant current-supplying；Second rectifier bridge High-frequency alternating current is subjected to rectification, the second filter capacitor is used for High frequency filter, and equivalent load is capacitive load or inductive load；It is former Side control circuit includes the first single chip machine controlling circuit, drive circuit, the first accessory power supply, the first radio communication circuit, first Voltage detecting circuit, remote control and second voltage detection circuit, control main switch and auxiliary switch realize that no-voltage is open-minded, Make whole device output voltage stabilization or outputting current steadily, wherein, the first single chip machine controlling circuit is according to the first radio communication The voltage signal for the main switch that signal of communication that circuit is received, first voltage detection electric circuit inspection are arrived and second voltage detection The voltage signal for the clamp capacitor that electric circuit inspection is arrived, exports the control signal of main switch and auxiliary switch, control letter respectively The driving main switch and auxiliary switch number after drive circuit isolation amplification；First accessory power supply is that the first single-chip microcomputer controls electricity Road and drive circuitry；First radio communication circuit receives feedback signal and the remote control hair that the second radio communication circuit is sent The control signal gone out, the first radio communication circuit can be to remote control emitter operating state signal；First voltage detects circuit Detect the voltage at main switch drain-source two ends；The plant running shape that remote control is sent according to the first radio communication circuit received Whether state signal, display device output voltage, output current and realize that no-voltage is open-minded, and remote control is to the first radio communication circuit Emissioning controling signal, makes the first single chip machine controlling circuit select Isobarically Control or current constant control；Second voltage detects electric circuit inspection The voltage at clamp capacitor two ends, when detecting the voltage increase at clamp capacitor two ends, the first single chip machine controlling circuit is auxiliary The control signal of switching tube is changed into high level, and auxiliary switch realizes that no-voltage is open-minded, when the voltage increase at clamp capacitor two ends When, primary side inductance is charged by the second diode for clamp capacitor, the second diode current flow, the electricity at auxiliary switch drain-source two ends Press as 0, auxiliary switch realizes that no-voltage is open-minded；Secondary controls circuit to control circuit, second by sample circuit, second singlechip Accessory power supply and the second radio communication circuit composition, for giving primary-side-control circuit transmission feedback signal, sample circuit detection dress The output voltage and output current put；Second singlechip controls circuit according to the signal of the sample circuit received, control second Radio communication circuit launches feedback signal to the first radio communication circuit；Second accessory power supply is that second singlechip control circuit is supplied Electricity.
2. a kind of method that control is transmitted using device electric energy as claimed in claim 1, it is characterised in that：Specific control process bag Include following steps：
(1) the first secondary, if load needs constant pressure to power, first, is switched to according to load selection control mode and collocation structure Compensating electric capacity, i.e., using primary side secondary series compensation structure in parallel, select constant pressure control method；If load needs constant current-supplying, The second secondary compensating electric capacity is then switched to, i.e., using primary side secondary shunt compensation structure in parallel, selects constant current control method；If both Do not select constant pressure to power, also do not select constant current-supplying, then whole device is standby, until selection power supply mode；
(2) if, selection constant pressure power, first using pulse width modulation soft start, give original switching frequency, maintained switch frequency Constant, ON time is gradually increased to setting value, and output voltage reaches setting voltage, when device output voltage is unstable, leads to Extra pulse frequency modulation(PFM) controls regulated output voltage；The output voltage signal detected is sent to second singlechip by sample circuit Circuit is controlled, second singlechip controls circuit according to the change of output voltage, by the second radio communication circuit to primary-side-control The first radio communication circuit that circuit is sent in different control signals, primary-side-control circuit receives the second radio communication circuit The signal sent, then pass to the first single chip machine controlling circuit, the switching frequency of the first single chip machine controlling circuit adjusting apparatus；If Output voltage becomes big, and second singlechip controls circuit to send increase switch to primary-side-control circuit by the second radio communication circuit The signal of frequency；If output voltage reduces, second singlechip controls circuit electric to primary-side-control by the second radio communication circuit Road sends the signal for reducing switching frequency, so that the output voltage of stabilising arrangement；When second voltage detects electric circuit inspection to clamper The control signal of auxiliary switch is changed into high level by the voltage increase at electric capacity two ends, the first single chip machine controlling circuit, and auxiliary is opened Close pipe and realize that no-voltage is open-minded, then detect whether main switch is that no-voltage is open-minded, main switch if not no-voltage is open-minded, Realize that no-voltage is open-minded by PWM controls, when the drive signal of main switch is changed into high level from low level, first voltage inspection The voltage at slowdown monitoring circuit detection main switch drain-source two ends, if the voltage at main switch drain-source two ends is not 0, that is, is not carried out zero electricity Press off it is logical, then the first single chip machine controlling circuit reduce main switch dutycycle；If the voltage at main switch drain-source two ends is 0, Realize that no-voltage is open-minded, then the dutycycle of main switch is constant；After main switch realizes that no-voltage is opened, judgment means are No to shut down, if providing stopping signal, device is stopped；If not providing stopping signal, output voltage is detected again, is repeated Above-mentioned steps；
(3) if, selection constant current-supplying, first using PWM soft starts, give original switching frequency, maintained switch frequency is constant, conducting Time is gradually increased to setting value, and output current reaches setting electric current, when device output current is unstable, passes through PFM controls The output current signal detected is sent to second singlechip control circuit, the second monolithic by stable output current, sample circuit Machine controls circuit to be changed according to the difference of output current, sends different to primary-side-control circuit by the second radio communication circuit The first radio communication circuit in control signal, primary-side-control circuit receives the signal that the second radio communication circuit is sent, then The first single chip machine controlling circuit, the switching frequency of the first single chip machine controlling circuit adjusting apparatus are passed to, if output current becomes big, Second singlechip control circuit can send the signal of increase switching frequency by the second radio communication circuit to primary-side-control circuit； If output current reduces, second singlechip control circuit to primary-side-control circuit can send reduction by the second radio communication circuit The signal of switching frequency, the output current of stabilising arrangement；When second voltage detects electric circuit inspection to the voltage at clamp capacitor two ends During increase, the control signal of auxiliary switch is changed into high level by the first single chip machine controlling circuit, and auxiliary switch realizes zero electricity Press off logical, then detect whether main switch is that no-voltage is open-minded, and main switch passes through PWM controls if not no-voltage is open-minded Realize that no-voltage is open-minded；When the drive signal of main switch is changed into high level from low level, first voltage detection electric circuit inspection The voltage at main switch drain-source two ends, if the voltage at main switch drain-source two ends is not 0, that is, it is open-minded to be not carried out no-voltage, then First single chip machine controlling circuit reduces the dutycycle of main switch；If the voltage at main switch drain-source two ends is 0, no-voltage is realized Open-minded, then the dutycycle of main switch is constant；After main switch realizes that no-voltage is opened, whether judgment means shut down, if giving Go out stopping signal, then device is stopped；If not providing stopping signal, output current is detected again, is repeated the above steps；It is whole Individual device is by the control mode regulated output voltage or output current of frequency conversion+variable duty cycle, while making main switch and auxiliary Switching tube realizes that no-voltage is open-minded, reaches the purpose of inductively coupled power transfer regulation and control.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110429691A (en) * 2019-08-30 2019-11-08 西南交通大学 A kind of constant current-constant-voltage charge radio energy transmission system based on half-bridge switching
EP4054053A4 (en) * 2019-10-30 2023-01-25 Huawei Technologies Co., Ltd. Wireless charging receiving end, system and control method

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CN104753152A (en) * 2015-04-10 2015-07-01 东南大学 Constant current-constant voltage composite topological sensing type charging system
CN104821643A (en) * 2015-05-25 2015-08-05 青岛大学 Robot wireless charging device
CN105896993A (en) * 2016-05-30 2016-08-24 西安交通大学 High-gain isolation type direct-current converter for multi-unit diode capacitor network

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CN104753152A (en) * 2015-04-10 2015-07-01 东南大学 Constant current-constant voltage composite topological sensing type charging system
CN104821643A (en) * 2015-05-25 2015-08-05 青岛大学 Robot wireless charging device
CN105896993A (en) * 2016-05-30 2016-08-24 西安交通大学 High-gain isolation type direct-current converter for multi-unit diode capacitor network

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Publication number Priority date Publication date Assignee Title
CN110429691A (en) * 2019-08-30 2019-11-08 西南交通大学 A kind of constant current-constant-voltage charge radio energy transmission system based on half-bridge switching
CN110429691B (en) * 2019-08-30 2020-11-24 西南交通大学 Constant current-constant voltage charging wireless power transmission system based on half-bridge switching
EP4054053A4 (en) * 2019-10-30 2023-01-25 Huawei Technologies Co., Ltd. Wireless charging receiving end, system and control method

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