CN107154683B - 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 PDFInfo
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- CN107154683B CN107154683B CN201710399486.4A CN201710399486A CN107154683B CN 107154683 B CN107154683 B CN 107154683B CN 201710399486 A CN201710399486 A CN 201710399486A CN 107154683 B CN107154683 B CN 107154683B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
The invention belongs to electroporation fields, it is related to a kind of inductively coupled power transfer device and control method with pull-up auxiliary switch, increase by one group of pull-up auxiliary switch branch in existing ICPT device LC resonance single-tube contravariant bipolarity inverter topology, it include an auxiliary switch in the branch, main switch is identical with the switching frequency of auxiliary switch, Sofe Switch control can be achieved, and improve reliability without the problem of leading directly between two pipes；In the case where keeping original circuit advantage, the voltage drop for bearing switching tube both ends is as low as original 2/3, make device using MOS transistor as switching tube, switching frequency is up to 83kHz or more, simultaneously because auxiliary switch turn-on time is short, low in energy consumption, technical solution is provided to further decrease the volume and weight of ICPT device, reducing cost.
Description
Technical field:
The invention belongs to electroporation fields, are related to a kind of inductively coupled power transfer device with pull-up auxiliary switch
And control method, the transmission using auxiliary switch branch for inductively electric energy.
Background technique:
Currently, the master of inductively coupled power transfer (Inductively CoupledPowerTransfer, ICPT) device
Circuit topology mostly uses greatly full-bridge voltage type inverter circuit, half-bridge LLC voltage-type resonance inversion circuit and LC resonance single-tube contravariant
Bipolarity inverter circuit, that there is circuit structures is relative complex for first two circuit topology, and the cost is relatively high for power supply, above and below bridge arm
Switching tube be easy to cause the problems such as leading directly to and burning out；The latter is a kind of novel radio electric energy transmission topology, it have circuit it is simple,
At low cost, efficiency of transmission is high, no-voltage can be achieved the advantages that opening with zero voltage turn-off control, but there is also some disadvantages,
When device input voltage is 220VacWhen/50Hz alternating current, the voltage that switching tube both ends are born in operational process is up to 1200V
More than, cause switching tube that can only select the higher isolated-gate field effect transistor (IGFET) (IGBT) of pressure resistance, in order to reduce ICPT device
Volume and weight, national Specification switching frequency need to reach 83kHz or more, and when the switching frequency of IGBT be greater than 25kHz with
Afterwards, loss can increase with the increase of switching frequency, and the volume and cost for constraining ICPT device further decrease, unfavorable
In the application of this novel I CPT device topology.Therefore, design one kind novel adaptive circuit and its control method has very much
Application and development value.
Summary of the invention:
The purpose of the present invention is to overcome the shortcomings of the existing technology, bipolar with LC resonance single-tube contravariant in existing ICPT device
Property inverter topology in increase by one group of pull-up auxiliary switch branch, in the branch include an auxiliary switch, main switch
It is identical with the switching frequency of auxiliary switch, Sofe Switch control can be achieved, and improve reliable between two pipes without the problem of leading directly to
Property；In the case where keeping original circuit advantage, the voltage drop for bearing switching tube both ends adopts device as low as original 2/3
Use MOS transistor (MOSFET) as switching tube, switching frequency is up to 83kHz or more, while because auxiliary switch is led
The logical time is short, low in energy consumption, provides technical solution to further decrease the volume and weight of ICPT device, reducing cost.
To achieve the goals above, the ICPT apparatus main body structure of the present invention with pull-up auxiliary switch includes the
One rectifier bridge, L1C1It is filter circuit, main switch, first diode, pull-up auxiliary switch branch, resonant coupling circuit, second whole
Flow bridge, the second filter capacitor, equivalent load, primary-side-control circuit and secondary side control circuit, 220VacThrough the first rectifier bridge, L1C1
Be converted into DC voltage after filter circuit, main switch, first diode and pull-up auxiliary switch branch by DC inverter at
High-frequency alternating current, high-frequency alternating current are applied to the both ends of primary side inductance in resonant coupling circuit, secondary side electricity in resonant coupling circuit
Sense both 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；First rectifier bridge rectifies industrial-frequency alternating current, L1C1Filter circuit is by filter inductance and the first filter capacitor
It is composed in series, is filtered for power frequency；Main switch, first diode and pull-up auxiliary switch branch for realizing electric energy inversion,
First diode is the anti-paralleled diode of main switch；Auxiliary switch, the second diode and clamp capacitor are according to electricity original
Reason composition pull-up auxiliary switch branch, for reducing the voltage at main switch drain-source both ends, wherein the second diode is that auxiliary is opened
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 there are dead zones, and the turn-on time of auxiliary switch is short, and conduction loss is small；Resonant coupling circuit is by primary compensation capacitor, primary side
Shielded layer, primary side inductance, secondary inductance, the secondary compensating electric capacity in shielded layer, the first pair or the second secondary side compensating electric capacity electrical connection
Composition, for energy to be transmitted to secondary side from primary side, to power 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 shielded layer and secondary side shielded layer are for improving
The device coefficient of coup and efficiency of transmission can weaken primary side inductance and secondary inductance to the electromagnetic interference of former and deputy side circuit board；First
The secondary compensating electric capacity when compensating electric capacity and second are secondary can switch mutually, if switching to the first secondary side compensating electric capacity, primary side is mended
It repays capacitor and the first secondary (PS) collocation structure output of connecting when compensating electric capacity composition primary side is in parallel secondary shows as constant pressure source, be applicable in
In the equipment for needing constant pressure to power, if switching to the second secondary side compensating electric capacity, primary compensation capacitor and the second secondary side compensation electricity
Hold secondary side (PP) the collocation structure output in parallel in parallel of composition primary side and shows as constant-current source, the equipment for being applicable to constant current-supplying；
Second rectifier bridge rectifies high-frequency alternating current, the second filter capacitor be used for High frequency filter, equivalent load be capacitive load or
Inductive load；Primary-side-control circuit includes first singlechip control circuit, driving circuit, the first accessory power supply, the first channel radio
Believe circuit, first voltage detection circuit, remote controler and second voltage detection circuit, controls main switch and auxiliary switch is realized
No-voltage is open-minded, makes whole device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit is according to
The voltage signal and for the main switch that signal of communication that one radio communication circuit receives, first voltage detection circuit detect
The voltage signal for the clamp capacitor that two voltage detecting circuits detect exports the control letter of main switch and auxiliary switch respectively
Number, control signal drives main switch and auxiliary switch after driving circuit isolation amplification；First accessory power supply is first single
Piece machine control circuit and drive circuitry；First radio communication circuit receives the feedback signal that the second radio communication circuit issues
The control signal issued with remote controler, the first radio communication circuit can be to remote controler emitter operating state signal；First electricity
Press the voltage at detection circuit detection main switch drain-source both ends；Remote controler is issued according to the first radio communication circuit received
Whether device operating state signal, display device output voltage, output electric current and realize that no-voltage is open-minded, and remote controler is to the first nothing
Line telecommunication circuit emissioning controling signal makes first singlechip control circuit selection Isobarically Control or current constant control；Second voltage inspection
Slowdown monitoring circuit detects the voltage at clamp capacitor both ends, when detecting the voltage increase at clamp capacitor both ends, first singlechip control
The control signal of auxiliary switch is become high level by circuit, and auxiliary switch realizes that no-voltage is open-minded, when clamp capacitor both ends
Voltage increase when, primary side inductance by the second diode be clamp capacitor charge, the second diode current flow, auxiliary switch leak
The voltage at source both ends is 0, and auxiliary switch realizes that no-voltage is open-minded；Secondary side control circuit is by sample circuit, second singlechip control
Circuit, the second accessory power supply and the second radio communication circuit composition processed are sampled for giving primary-side-control circuit transmission feedback signal
The output voltage and output electric current of circuit checker；Second singlechip control circuit is according to the letter of the sample circuit received
Number, the second radio communication circuit of control emits feedback signal to the first radio communication circuit；Second accessory power supply is the second monolithic
The power supply of machine control circuit.
The present invention realize with pull-up auxiliary switch ICPT device control process the following steps are included:
(1), first first is switched to if load needs constant pressure to power according to load selection control mode and collocation structure
Secondary side compensating electric capacity selects constant pressure control method that is, using primary side secondary side series connection (PS) collocation structure in parallel；If load needs perseverance
Stream power supply then switches to the second secondary side compensating electric capacity, i.e., using primary side secondary side (PP) collocation structure in parallel in parallel, selects constant current control
Method processed；If neither selection constant pressure power supply, does not also select constant current-supplying, then whole device is standby, until selection power supply mode；
(2) if, selection constant pressure power supply, first using pulse width modulate (PWM) soft start, give original switching frequency, protect
It is constant to hold switching frequency, turn-on time is gradually increased to setting value, and output voltage reaches setting voltage, when device output voltage not
When stablizing, stabilized the output voltage by pulse frequency modulated (PFM) control；The output voltage signal hair that sample circuit will test
Second singlechip control circuit is given, second singlechip control circuit passes through the second wireless communication according to the variation of output voltage
Circuit issues different control signals to primary-side-control circuit, and the first radio communication circuit in primary-side-control circuit receives
The signal that two radio communication circuits issue, then first singlechip control circuit is passed to, first singlechip control circuit adjustment dress
The switching frequency set；If output voltage becomes larger, second singlechip control circuit passes through the second radio communication circuit to primary-side-control
Circuit issues the signal for increasing switching frequency；If output voltage reduces, second singlechip control circuit passes through the second wireless communication
Circuit issues the signal for reducing switching frequency to primary-side-control circuit, thus the output voltage of stabilising arrangement；When second voltage is examined
Slowdown monitoring circuit detects that the voltage at clamp capacitor both ends increases, and first singlechip control 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, is controlled by PWM and realize that no-voltage is open-minded, when the driving signal of main switch becomes high electricity from low level
Usually, the voltage at first voltage detection circuit detection main switch drain-source both ends, if the voltage at main switch drain-source both ends is not
0, that is, it is not carried out that no-voltage is open-minded, then first singlechip control circuit reduces the duty ratio of main switch；If main switch leaks
The voltage at source both ends is 0, i.e. realization no-voltage is open-minded, then the duty ratio of main switch is constant；When main switch realizes no-voltage
After opening, whether judgment means are shut down, if providing stopping signal, device stops working；If not providing stopping signal, again
Output voltage is detected, is repeated the above steps；
(3) if, selection constant current-supplying, first use PWM soft start, give original switching frequency, keep switching frequency it is constant,
Turn-on time is gradually increased to setting value, and output electric current reaches setting electric current, when device output electric current is unstable, passes through PFM
Output electric current is stablized in control, and the output current signal that sample circuit will test is sent to second singlechip control circuit, and second
Single chip machine controlling circuit changes according to the different of output electric current, is issued not by the second radio communication circuit to primary-side-control circuit
With control signal, the first radio communication circuit in primary-side-control circuit receives the letter of the second radio communication circuit sending
Number, then first singlechip control circuit is passed to, first singlechip control circuit adjusts the switching frequency of device, if output electric current
Become larger, second singlechip control circuit, which can be issued by the second radio communication circuit to primary-side-control circuit, increases switching frequency
Signal；If exporting electric current to reduce, second singlechip control circuit can be sent out by the second radio communication circuit to primary-side-control circuit
Reduce the signal of switching frequency, the output electric current of stabilising arrangement out；When second voltage detection circuit detects clamp capacitor both ends
Voltage when increasing, the control signal of auxiliary switch is become high level by first singlechip control 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 control realizes that no-voltage is open-minded；When the driving signal of main switch becomes high level from low level, first voltage detection electricity
The voltage at road detection main switch drain-source both ends is not carried out no-voltage and opens if the voltage at main switch drain-source both ends is not 0
Logical, then first singlechip control circuit reduces the duty ratio of main switch；If the voltage at main switch drain-source both ends is 0, realize
No-voltage is open-minded, then the duty ratio of main switch is constant；After main switch realizes that no-voltage is opened, whether judgment means stop
Machine, if providing stopping signal, device stops working；If not providing stopping signal, detection output electric current, is repeated above-mentioned again
Step；Whole device stabilizes the output voltage or exports electric current by frequency conversion+variable duty cycle control mode, while making main switch
It realizes that no-voltage is open-minded with auxiliary switch, achievees the purpose that inductively coupled power transfer regulates and controls.
Compared with prior art, the present invention using the ICPT device with pull-up auxiliary switch, simple with circuit structure,
Main switch and auxiliary switch switching frequency having the same 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 turn-on time is short and is able to achieve Sofe Switch control, makes entire
The increased loss of device is smaller；The voltage that increased pull-up auxiliary switch branch bears main switch reduces by 1/3, to make to lead
Switching tube and auxiliary switch can be used the MOSFET that price is low, switching frequency is up to 83kHz or more and realize, so that switch frequency
Rate meets national standard, and the volume of loosely coupled transformer also accordingly reduces, and is conducive to application；It is accounted for using frequency conversion+change
Empty ratio is controlled, and it is open-minded to can be realized no-voltage, stabilizes the output voltage or export electric current, and substantially increase whole device can
By property, be conducive to application；Different collocation structures and corresponding PWM and PFM control are used according to different loads,
If load needs constant pressure to power, the first secondary side compensating electric capacity is switched to, that is, uses the collocation structure of PS, while using constant pressure control
Method processed；If load needs constant current-supplying, the second secondary side compensating electric capacity is switched to, that is, uses the collocation structure of PP, adopts simultaneously
Use constant current control method.
Detailed description of the invention:
Fig. 1 is main structure circuit theory schematic diagram of the invention.
Fig. 2 is the process flow diagram that the present invention realizes the ICPT device control with pull-up auxiliary switch.
Fig. 3 is work electric signal waveform figure of the 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 both ends, Uds2 are auxiliary switch Q2Drain-source both ends
Voltage, Up be primary compensation capacitor CpThe voltage at both ends, Ip are primary inductor LpElectric current, Uc be clamp capacitor CcBoth ends
Voltage.
Specific embodiment:
Technical solution of the present invention is described in more detail in the following with reference to the drawings and specific embodiments.
Embodiment:
The ICPT apparatus main body 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, first diode DQ1, pull-up auxiliary switch branch 3, resonant coupling circuit 4, the second rectifier bridge 5,
Second filter capacitor C2, equivalent load Z, primary-side-control circuit 6 and secondary side control circuit 7,220VacThrough the first rectifier bridge 1, L1C1
DC voltage, main switch Q are converted into after filter circuit 21, first diode DQ1With pull-up auxiliary switch branch 3 by direct current
It is reverse into high-frequency alternating current, high-frequency alternating current is applied to primary inductor L in resonant coupling circuit 4pBoth ends, resonant coupling circuit
Secondary inductance L in 4sBoth ends induce voltage, secondary inductance LsBoth end voltage is through the second rectifier bridge 5, the second filter capacitor C2After turn
It changes direct current into, powers for equivalent load Z；First rectifier bridge 1 rectifies industrial-frequency alternating current, L1C1Filter circuit 2 is by filtering
Inductance L1With the first filter capacitor C1It is composed in series, is filtered for power frequency；Main switch Q1, first diode DQ1It is assisted with pull-up
Switching branches 3 are for realizing electric energy inversion, first diode DQ1For main switch Q1Anti-paralleled diode；Auxiliary switch
Q2, the second diode DQ2With clamp capacitor CcPull-up auxiliary switch branch 3 is formed according to electrical principles, for reducing main switch
Q1The voltage at drain-source both 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 are dead zone, auxiliary switch Q2Conducting
Time is short, and conduction loss is small；Resonant coupling circuit 4 is by primary compensation capacitor Cp, primary side shielded layer Sp, primary inductor Lp, secondary side electricity
Feel Ls, pair side shielded layer Ss, the first pair side compensating electric capacity CsOr the second pair side compensating electric capacity CtElectrical connection composition, is used for energy
It is transmitted to secondary side from primary side, to power 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 shielded layer SpWith secondary side shielded 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 side compensation electricity
Hold CsWith the second pair side compensating electric capacity CtIt can switch mutually, if switching to the first pair side compensating electric capacity Cs, then primary compensation capacitor
CpWith the first pair side compensating electric capacity CsComposition PS collocation structure output shows as constant pressure source, the equipment for being applicable to constant pressure power supply,
If switching to the second pair side compensating electric capacity Ct, then primary compensation capacitor CpWith the second pair side compensating electric capacity CtForm PP collocation structure
Output shows as constant-current source, the equipment for being applicable to constant current-supplying；Second rectifier bridge 5 rectifies high-frequency alternating current, 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, driving circuit 9, the first accessory power supply 10, the first radio communication circuit 11, first voltage detection circuit
12, remote controler 13 and second voltage detection circuit 14 control main switch Q1With auxiliary switch Q2It realizes that no-voltage is open-minded, makes
Whole device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit 8 is according to the first wireless communication electricity
The main switch Q that signal of communication that road 11 receives, first voltage detection circuit 12 detect1Voltage signal and second voltage
The clamp capacitor C that detection circuit 14 detectscVoltage signal, respectively export main switch Q1With auxiliary switch Q2Control
Signal, control signal drive main switch Q after the isolation amplification of driving circuit 91With auxiliary switch Q2；First accessory power supply 10
It powers for first singlechip control circuit 8 and driving circuit 9；First radio communication circuit 11 receives the second radio communication circuit 18
The control signal that the feedback signal and remote controler 13 of sending issue, the first radio communication circuit 11 can be to 13 emitter of remote controler
Operating state signal；First voltage detection circuit 12 detects main switch Q1The voltage at drain-source both ends；Remote controler 13 is according to reception
The device operating state signal that the first radio communication circuit 11 for arriving issues, display device output voltage, output electric current and whether
Realize that no-voltage is open-minded, remote controler 13 makes first singlechip control circuit 8 to 11 emissioning controling signal of the first radio communication circuit
Select Isobarically Control or current constant control；Second voltage detection circuit 14 detects clamp capacitor CcThe voltage at both ends is clamped when detecting
Position capacitor CcWhen the voltage at both ends increases, first singlechip control circuit 8 is auxiliary switch Q2Control signal become high electricity
It is flat, auxiliary switch Q2Realize that no-voltage is open-minded, as clamp capacitor CcWhen the voltage at both ends increases, primary inductor LpPass through second
Diode DQ2For clamp capacitor CcCharging, the second diode DQ2Conducting, auxiliary switch Q2The voltage at drain-source both ends is 0, auxiliary
Switching tube Q2Realize that no-voltage is open-minded；Secondary side control circuit 7 is auxiliary by sample circuit 15, second singlechip control circuit 16, second
Power supply 17 and the second radio communication circuit 18 is helped to form, for emitting feedback signal to primary-side-control circuit 6, sample circuit 15 is examined
Survey the output voltage and output electric current of device；Second singlechip control circuit 16 according to the signal of the sample circuit 15 received,
It controls the second radio communication circuit 18 and emits 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 realize with pull-up auxiliary switch ICPT device control process the following steps are included:
(1), first first is switched to if load needs constant pressure to power according to load selection control mode and collocation structure
Secondary side compensating electric capacity Cs, that is, the collocation structure of PS is used, constant pressure control method is selected；If load needs constant current-supplying, switch
At the second pair side compensating electric capacity Ct, that is, the collocation structure of PP is used, constant current control method is selected；If neither selection constant pressure power supply,
Also constant current-supplying is not selected, then whole device is standby, until selection power supply mode；
(2) if, selection constant pressure power supply, first use PWM soft start, give original switching frequency, keep switching frequency it is constant,
Turn-on time is gradually increased to setting value, and output voltage reaches setting voltage, when device output voltage is unstable, passes through PFM
Control stabilizes the output voltage；The output voltage signal that sample circuit 15 will test is sent to second singlechip control circuit 16,
Second singlechip control circuit 16 is according to the variation of output voltage, by the second radio communication circuit 18 to primary-side-control circuit 6
Different control signals is issued, the first radio communication circuit 11 in primary-side-control circuit 6 receives the second radio communication circuit
18 signals issued, then first singlechip control circuit 8 is passed to, first singlechip control circuit 8 adjusts the switch frequency of device
Rate；If output voltage becomes larger, second singlechip control circuit 16 is sent out by the second radio communication circuit 18 to primary-side-control circuit 6
Increase the signal of switching frequency out；If output voltage reduces, second singlechip control circuit 16 passes through the second radio communication circuit
18 issue the signal for reducing switching frequency to primary-side-control circuit 6, thus the output voltage of stabilising arrangement；When second voltage detects
Circuit 14 detects clamp capacitor CcThe voltage at both ends increases, and first singlechip control circuit 8 is auxiliary switch Q2Control letter
Number become high level, auxiliary switch Q2It realizes that no-voltage is open-minded, then detects main switch Q1It whether is that no-voltage is open-minded, it is main
Switching tube Q1If not no-voltage is open-minded, is controlled by PWM and realize that no-voltage is open-minded, as main switch Q1Driving signal by low
When level becomes high level, first voltage detection circuit 12 detects main switch Q1The voltage at drain-source both ends, if main switch Q1Leakage
The voltage at source both ends is not 0, that is, it is open-minded to be not carried out no-voltage, then first singlechip control circuit 8 reduces main switch Q1's
Duty ratio；If main switch Q1The voltage at drain-source both ends is 0, i.e. realization no-voltage is open-minded, then main switch Q1Duty ratio not
Become；As main switch Q1After realizing that no-voltage is opened, whether judgment means are shut down, if providing stopping signal, 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 use PWM soft start, give original switching frequency, keep switching frequency it is constant,
Turn-on time is gradually increased to setting value, and output electric current reaches setting electric current；When device output electric current is unstable, pass through PFM
Output electric current is stablized in control, and 15 output current signals detected of sample circuit are sent to second singlechip control circuit 16,
Second singlechip control circuit 16 is according to the variation of output electric current, by the second radio communication circuit 18 to primary-side-control circuit 6
Different control signals is issued, the first radio communication circuit 11 in primary-side-control circuit 6 receives the second radio communication circuit
18 signals issued, then first singlechip control circuit 8 is passed to, first singlechip control circuit 8 adjusts the switch frequency of device
Rate, if output electric current becomes larger, second singlechip control circuit 16 is sent out by the second radio communication circuit 18 to primary-side-control circuit 6
Increase the signal of switching frequency out；If exporting electric current to reduce, second singlechip control circuit 16 can pass through the second wireless communication electricity
Road 18 issues the signal for reducing switching frequency, the output electric current of stabilising arrangement, when second voltage detects electricity to primary-side-control circuit 6
Road 14 detects clamp capacitor CcThe voltage at both ends increases, and first singlechip control circuit 8 is auxiliary switch Q2Control signal
Become high level, auxiliary switch Q2It realizes that no-voltage is open-minded, then detects main switch Q1It whether is that no-voltage is open-minded, master opens
Close pipe Q1If not no-voltage is open-minded, is controlled by PWM and realize that no-voltage is open-minded, as main switch Q1Driving signal by low electricity
Flat when becoming high level, first voltage detection circuit 12 detects main switch Q1The voltage at drain-source both ends, if main switch Q1Drain-source
The voltage at both ends is not 0, that is, it is open-minded to be not carried out no-voltage, then first singlechip control circuit 8 reduces main switch Q1Account for
Empty ratio；If main switch Q1The voltage at drain-source both ends is 0, i.e. realization no-voltage is open-minded, then main switch Q1Duty ratio it is constant；
As main switch Q1After realizing that no-voltage is opened, whether judgment means are shut down, if providing stopping signal, device stops working；
If not providing stopping signal, detection output electric current, repeats the above steps again；Whole device passes through frequency conversion+variable duty cycle
Control mode stabilizes the output voltage or exports electric current, while making main switch Q1With auxiliary switch Q2It realizes that no-voltage is open-minded, reaches
The purpose regulated and controled to inductively coupled power transfer.
The ICPT device course of work with pull-up auxiliary switch that the present embodiment is related to includes with the next stage:
The t0-t1 period: at the t0 moment, main switch Q1Driving voltage Ugs1 become high level, primary inductor L at this timep's
Electric current is negative, main switch Q1It is not turned on, primary inductor LpPass through first diode DQ1With the first filter capacitor C1Afterflow, master open
Close pipe Q1The voltage at drain-source both ends is 0, arrives the t1 moment, primary inductor LpElectric current become 0, main switch Q1Conducting, main switch
Q1Realize that no-voltage is open-minded；
The t1-t2 period: input voltage is primary inductor LpCharging, primary inductor LpElectric current gradually increase, arrive the t2 moment,
Main switch Q1Driving voltage Ugs1 become low level, main switch Q1Shutdown；
The t2-t3 period: primary compensation capacitor CpFor primary inductor LpCharging, primary inductor LpElectric current continue growing, arrive t3
Moment, primary compensation capacitor CpVoltage be reduced to 0, primary inductor LpElectric current increase to maximum；
The t3-t4 period: 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 DQ2Reversed cut-off, arrives the t4 moment,
Primary compensation capacitor CpVoltage be greater than clamp capacitor CcVoltage, the second diode DQ2Conducting；
The t4-t5 period: primary inductor LpIt is simultaneously primary compensation capacitor CpWith clamp capacitor CcCharging, clamp capacitor Cc's
Voltage is gradually increased, and arrives the t5 moment, auxiliary switch Q2Driving voltage Ugs2 become high level, but primary inductor LpElectric current
Still it is positive, auxiliary switch Q2It is not turned on；
The t5-t6 period: primary inductor LpContinue as primary compensation capacitor CpWith clamp capacitor CcCharging, the second diode DQ2
Conducting, auxiliary switch Q2The voltage at drain-source both ends is 0, arrives the t6 moment, primary inductor LpElectric current fall 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 period: primary compensation capacitor CpWith clamp capacitor CcIt is simultaneously primary inductor LpThe t7 moment is arrived in reverse charging,
Auxiliary switch Q2Driving voltage Ugs2 become low level, auxiliary switch Q2Shutdown, clamp capacitor CcStop being primary side inductance
LpCharging；
The t7-t8 period: primary compensation capacitor CpVoltage reduce, primary inductor LpElectric current reduce, arrive the t8 moment, primary side
Compensating electric capacity CpVoltage become 0；
The t8-t9 period: primary inductor LpFor primary compensation capacitor CpReverse charging, primary compensation capacitor CpVoltage gradually
Increase, arrives the t9 moment, primary compensation capacitor CpVoltage increase to and the first filter capacitor C1Voltage it is equal；
The t9-t10 period: primary inductor LpPass through first diode DQ1With the first filter capacitor C1The t10 moment is arrived in afterflow,
Main switch Q1Driving voltage Ugs1 become high level, primary inductor L at this timepElectric current be negative, main switch Q1It is not turned on.
Claims (2)
1. a kind of control method of the inductively coupled power transfer device with pull-up auxiliary switch, it is characterised in that: specific control
Process processed the following steps are included:
(1), first according to load selection control mode and collocation structure, if load needs constant pressure to power, the first secondary side is switched to
Compensating electric capacity selects constant pressure control method that is, using primary side secondary side series compensation structure in parallel；If load needs constant current-supplying,
The second secondary side compensating electric capacity is then switched to, i.e., using primary side secondary side shunt compensation structure in parallel, selects constant current control method；If both
It does not select constant pressure to power, does not also select constant current-supplying, then whole device is standby, until selection power supply mode；
(2) if, selection constant pressure power supply, first using pulse width modulate soft start, give original switching frequency, keep switching frequency
Constant, turn-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) control stabilizes the output voltage；The output voltage signal that sample circuit will test is sent to second singlechip
Control circuit, second singlechip control circuit is according to the variation of output voltage, by the second radio communication circuit to primary-side-control
Circuit issues different control signals, and the first radio communication circuit in primary-side-control circuit receives the second radio communication circuit
The signal of sending, then first singlechip control circuit is passed to, first singlechip control circuit adjusts the switching frequency of device；If
Output voltage becomes larger, and second singlechip control circuit, which is issued by the second radio communication circuit to primary-side-control circuit, increases switch
The signal of frequency；If output voltage reduces, second singlechip control circuit is electric to primary-side-control by the second radio communication circuit
Road issues the signal for reducing switching frequency, thus the output voltage of stabilising arrangement；When second voltage detection circuit detects clamper
The voltage at capacitor both ends increases, and the control signal of auxiliary switch is become high level by first singlechip control 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,
It is controlled by PWM and realizes that no-voltage is open-minded, when the driving signal of main switch becomes high level from low level, first voltage inspection
Slowdown monitoring circuit detects the voltage at main switch drain-source both ends, if the voltage at main switch drain-source both ends is not 0, that is, is not carried out zero electricity
Press off it is logical, then first singlechip control circuit reduce main switch duty ratio；If the voltage at main switch drain-source both ends is 0,
Realize that no-voltage is open-minded, then the duty ratio of main switch is constant；After main switch realizes that no-voltage is opened, judgment means are
No shutdown, if providing stopping signal, device stops working；If not providing stopping signal, output voltage is detected again, is repeated
Above-mentioned steps；
(3) if, selection constant current-supplying, first use PWM soft start, give original switching frequency, keep switching frequency it is constant, conducting
Time is gradually increased to setting value, and output electric current reaches setting electric current, when device output electric current is unstable, is controlled by PFM
Stablize output electric current, the output current signal that sample circuit will test is sent to second singlechip control circuit, the second monolithic
Machine control circuit changes according to the different of output electric current, is issued by the second radio communication circuit to primary-side-control circuit different
Signal is controlled, the first radio communication circuit in primary-side-control circuit receives the signal of the second radio communication circuit sending, then
First singlechip control circuit is passed to, first singlechip control circuit adjusts the switching frequency of device, if output electric current becomes larger,
Second singlechip control circuit can issue the signal for increasing switching frequency by the second radio communication circuit to primary-side-control circuit；
If exporting electric current to reduce, second singlechip control circuit, which can be issued by the second radio communication circuit to primary-side-control circuit, to be reduced
The signal of switching frequency, the output electric current of stabilising arrangement；When second voltage detection circuit detects the voltage at clamp capacitor both ends
When increase, the control signal of auxiliary switch is become high level by first singlechip control circuit, and auxiliary switch realizes zero electricity
It presses off logical, then detects whether main switch is that no-voltage is open-minded, main switch is controlled by PWM if not no-voltage is open-minded
Realize that no-voltage is open-minded；When the driving signal of main switch becomes high level from low level, the detection of first voltage detection circuit
The voltage at main switch drain-source both ends, if the voltage at main switch drain-source both ends is not 0, that is, it is open-minded to be not carried out no-voltage, then
The duty ratio of first singlechip control circuit reduction main switch；If the voltage at main switch drain-source both ends is 0, no-voltage is realized
Open-minded, then the duty ratio of main switch is constant；After main switch realizes that no-voltage is opened, whether judgment means are shut down, if giving
Stopping signal out, then device stops working；If not providing stopping signal, detection output electric current, repeats the above steps again；It is whole
A device stabilizes the output voltage or exports electric current by frequency conversion+variable duty cycle control mode, while making main switch and auxiliary
Switching tube realizes that no-voltage is open-minded, achievees the purpose that inductively coupled power transfer regulates and controls.
2. the control method of the inductively coupled power transfer device according to claim 1 with pull-up auxiliary switch, special
Sign is that the inductively coupled power transfer device with pull-up auxiliary switch is in existing ICPT device LC resonance single tube
Increase by one group of pull-up auxiliary switch branch in inversion bipolarity inverter topology, specific structure includes the first rectifier bridge, L1C1Filter
Wave circuit, main switch, first diode, pull-up auxiliary switch branch, resonant coupling circuit, the second rectifier bridge, the second filtering
Capacitor, equivalent load, primary-side-control circuit and secondary side control circuit, 220V alternating current is through the first rectifier bridge, L1C1After filter circuit
Be converted into DC voltage, main switch, first diode and pull-up auxiliary switch branch by DC inverter at high-frequency alternating current,
High-frequency alternating current is applied to the both ends of primary side inductance in resonant coupling circuit, and secondary inductance both ends induce in resonant coupling circuit
Voltage, secondary inductance both end voltage are converted into direct current after the second rectifier bridge, the second filter capacitor, power for equivalent load；
First rectifier bridge rectifies industrial-frequency alternating current, L1C1Filter circuit is composed in series by filter inductance and the first filter capacitor, is used
It is filtered in power frequency；For realizing electric energy inversion, first diode is for main switch, first diode and pull-up auxiliary switch branch
The anti-paralleled diode of main switch；Auxiliary switch, the second diode and clamp capacitor are auxiliary according to electrical principles composition pull-up
Switching branches are helped, for reducing the voltage at main switch drain-source both ends, wherein the second diode is the inverse parallel of auxiliary switch
Diode；Auxiliary switch is identical with main switch switching frequency, and there are dead zones for the conducting of auxiliary switch and main switch, auxiliary
Help the turn-on time of switching tube short, conduction loss is small；Resonant coupling circuit is by primary compensation capacitor, primary side shielded layer, primary side electricity
Sense, secondary inductance, pair compensating electric capacity or the second secondary side compensating electric capacity electrical connection composition in shielded layer, the first pair, being used for will
Amount is transmitted to secondary side from primary side, to power for equivalent load, wherein the mutual inductance between primary side inductance and secondary inductance is with primary side
Transmission range between inductance and secondary inductance and change；Primary side shielded layer and secondary side shielded layer are for improving the device coefficient of coup
And efficiency of transmission, primary side inductance and secondary inductance can be weakened to the electromagnetic interference of former and deputy side circuit board；First secondary side compensating electric capacity
It can switch mutually with the second secondary side compensating electric capacity, if switching to the first secondary side compensating electric capacity, primary compensation capacitor and first
The secondary series compensation structure output when compensating electric capacity composition primary side is in parallel secondary shows as constant pressure source, is applicable to constant pressure power supply
Equipment, if switching to the second secondary side compensating electric capacity, primary compensation capacitor and the second secondary side compensating electric capacity composition primary side are in parallel secondary
Side shunt compensation structure output shows as constant-current source, the equipment for being applicable to constant current-supplying；Second rectifier bridge is by high-frequency ac
Electricity is rectified, and the second filter capacitor is used for High frequency filter, and equivalent load is capacitive load or inductive load；Primary-side-control circuit
Including first singlechip control circuit, driving circuit, the first accessory power supply, the first radio communication circuit, first voltage detection electricity
Road, remote controler and second voltage detection circuit, control main switch and auxiliary switch realizes that no-voltage is open-minded, make whole device
Output voltage stabilization or outputting current steadily, wherein first singlechip control circuit is received according to the first radio communication circuit
Signal of communication, the voltage signal of main switch that detects of first voltage detection circuit and second voltage detection circuit detect
Clamp capacitor voltage signal, respectively export main switch and auxiliary switch control signal, control signal through driving electricity
Main switch and auxiliary switch are driven after the isolation amplification of road；First accessory power supply is first singlechip control circuit and driving electricity
Road power supply；First radio communication circuit receives the feedback signal that the second radio communication circuit issues and the control letter that remote controler issues
Number, the first radio communication circuit can be to remote controler emitter operating state signal；First voltage detection circuit detects main switch
The voltage at pipe drain-source both ends；The device operating state signal that remote controler is issued according to the first radio communication circuit received is shown
Whether showing device output voltage, output electric current and realize that no-voltage is open-minded, and remote controler is to the first radio communication circuit emission control
Signal makes first singlechip control circuit selection Isobarically Control or current constant control；Second voltage detection circuit detects clamp capacitor
The voltage at both ends, when detecting the voltage increase at clamp capacitor both ends, first singlechip control circuit is auxiliary switch
Control signal becomes high level, and auxiliary switch realizes that no-voltage is open-minded, when the voltage at clamp capacitor both ends increases, primary side electricity
Sense is clamp capacitor charging by the second diode, and the second diode current flow, the voltage at auxiliary switch drain-source both ends is 0, auxiliary
Switching tube is helped to realize that no-voltage is open-minded；Secondary side control circuit is by sample circuit, second singlechip control circuit, the second accessory power supply
It is formed with the second radio communication circuit, for giving primary-side-control circuit transmission feedback signal, the output of sample circuit detection device
Voltage and output electric current；Signal of the second singlechip control circuit according to the sample circuit received, the second wireless communication of control
Circuit emits feedback signal to the first radio communication circuit；Second accessory power supply is the power supply of second singlechip control circuit.
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