CN107147297B - A kind of inductively coupled power transfer control method with drop-down auxiliary switch - Google Patents
A kind of inductively coupled power transfer control method with drop-down auxiliary switch Download PDFInfo
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- CN107147297B CN107147297B CN201710401372.9A CN201710401372A CN107147297B CN 107147297 B CN107147297 B CN 107147297B CN 201710401372 A CN201710401372 A CN 201710401372A CN 107147297 B CN107147297 B CN 107147297B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H02J5/005—
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- H02J7/025—
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- 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)
- Physics & Mathematics (AREA)
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Abstract
The invention belongs to electroporation fields, it is related to a kind of inductively coupled power transfer control method with drop-down auxiliary switch, first according to load selection control mode and collocation structure, if load needs constant pressure to power, then switch to the first secondary side compensating electric capacity, i.e. using the concatenated collocation structure in primary side secondary side in parallel, constant pressure control method is selected；If load needs constant current-supplying, the second secondary side compensating electric capacity is switched to, using the collocation structure of primary side secondary side parallel connection in parallel, selects constant current control method；If neither selection constant pressure power supply, does not also select constant current-supplying, then device is standby, until selection power supply mode；Whole device stabilizes the output voltage or exports electric current by frequency conversion+variable duty cycle control mode, main switch and auxiliary switch is set to realize that no-voltage is open-minded simultaneously, achieve the purpose that inductively coupled power transfer regulates and controls, stabilize the output voltage or export electric current, the reliability for improving device, is conducive to application.
Description
Technical field:
The invention belongs to electroporation fields, are related to a kind of inductively coupled power transfer control with drop-down auxiliary switch
Method, the transmission using auxiliary switch branch for inductively electric energy control.
Background technique
Currently, inductively coupled power transfer (Inductively Coupled Power Transfer, ICPT) device
Main circuit topology mostly uses greatly full-bridge voltage type inverter circuit, half-bridge LLC voltage-type resonance inversion circuit and LC resonance single tube inverse
Become 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, on bridge arm
Lower switch tube capacity easily causes the problems such as leading directly to and burning out；The latter is a kind of novel radio electric energy transmission topology, simple with circuit,
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.So design the novel adaptive circuit control method of one kind has application very much
Development volue.
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 drop-down 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 makes device can as low as original 2/3
Using using MOS transistor (MOSFET), as switching tube, switching frequency is up to 83kHz or more, while because of auxiliary switch
Pipe turn-on time is short, low in energy consumption, for the volume and weight for further decreasing ICPT device, reduces cost and provides technical solution.
To achieve the goals above, the present invention uses the inductively coupled power transfer device with drop-down auxiliary switch to realize
The method of electric energy transmission control, specifically includes the following steps:
(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 the collocation structure of primary side secondary side series connection (PS) in parallel；If load needs
Constant current-supplying then switches to the second secondary side compensating electric capacity, using the collocation structure of primary side secondary side (PP) in parallel in parallel, selects constant current
Control method；If neither selection constant pressure power supply, does not also select constant current-supplying, then 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,
Keep switching frequency constant, turn-on time is gradually increased to setting value, and output voltage reaches setting voltage, when device output voltage
When unstable, stabilized the output voltage by pulse frequency modulated (PFM) control.Sample circuit is the output voltage signal detected
It is sent to second singlechip control circuit, second singlechip control circuit changes according to the difference of output voltage, passes through the second nothing
Line telecommunication circuit issues different control signals to primary-side-control circuit, and the first radio communication circuit in primary-side-control circuit connects
The signal of the second radio communication circuit sending is received, then passes to first singlechip control circuit, first singlechip control circuit
To adjust the switching frequency of device；If output voltage becomes larger, second singlechip control circuit can pass through the second radio communication circuit
The signal for increasing switching frequency is issued to primary-side-control circuit；If output voltage reduces, second singlechip control circuit passes through the
Two radio communication circuits issue the signal for reducing switching frequency to primary-side-control circuit, thus the output voltage of stabilising arrangement；When
Second voltage detection circuit detects that the voltage at clamp capacitor both ends increases, and first singlechip control circuit is auxiliary switch
Control signal becomes high level, and auxiliary switch realizes that no-voltage is open-minded, and whether detection main switch is that no-voltage is open-minded, and master opens
Pipe is closed if not no-voltage is open-minded, is controlled by PWM and realizes that no-voltage is open-minded, when the driving signal of main switch is become by low level
When for high level, first voltage detection circuit detects the voltage at main switch drain-source both ends, if the electricity at main switch drain-source both ends
Pressure is not 0, that is, is not carried out that no-voltage is open-minded, then first singlechip control circuit reduces the duty ratio of main switch；If master opens
The voltage for closing pipe drain-source both ends is 0, that is, realizes that no-voltage is open-minded, then the duty ratio of main switch is constant；When main switch reality
After existing no-voltage is opened, whether judgment means are shut down, if providing stopping signal, device stops working；If not providing shutdown letter
Number, then output voltage is detected again, is repeated the above steps；
(3) if, selection constant current-supplying, use PWM soft start first, i.e., given original switching frequency keeps switching frequency
Constant, turn-on time is gradually increased to setting value, and output electric current reaches setting electric current；When the output electric current of device is unstable,
It is controlled by PFM and stablizes output electric current, the output current signal detected is sent to second singlechip control electricity by sample circuit
Road, second singlechip control circuit are sent out by the second radio communication circuit to primary-side-control circuit according to the variation of output electric current
Different control signal out, the first radio communication circuit in primary-side-control circuit receive the sending of the second radio communication circuit
Signal, then first singlechip control circuit is passed to, first singlechip control circuit adjusts the switching frequency of device；If output electricity
Rheology is big, and second singlechip control circuit, which is 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 is issued by the second radio communication circuit to primary-side-control circuit
The signal for reducing switching frequency, thus the output electric current of stabilising arrangement；When second voltage detection circuit detects clamp capacitor two
The voltage at end increases, and 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, and whether detection main switch is that no-voltage is open-minded, and main switch is controlled by PWM if not no-voltage is open-minded
System realizes that no-voltage is open-minded, when the driving signal of main switch becomes high level from low level, the inspection of first voltage detection circuit
The voltage for surveying 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 first singlechip control circuit reduces the duty ratio of main switch；If the voltage at main switch drain-source both ends is 0, that is, 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.
The main structure of inductively coupled power transfer device of the present invention with drop-down auxiliary switch includes first whole
Flow bridge, L1C1Filter circuit, resonant coupling circuit, main switch, first diode, drop-down auxiliary switch branch, the second rectification
Bridge, the second filter capacitor, equivalent load, primary-side-control circuit and secondary side control circuit；220VacThrough the first rectifier bridge, L1C1Filter
DC voltage is converted into after wave circuit, main switch, first diode and drop-down auxiliary switch branch are by DC inverter at height
Frequency alternating current, high-frequency alternating current are applied to the both ends of primary side inductance in resonant coupling circuit, secondary inductance in resonant coupling circuit
Both ends induce voltage, and secondary inductance both end voltage is converted into direct current after the second rectifier bridge, the second filter capacitor, are equivalent
Load supplying；First rectifier bridge rectifies industrial-frequency alternating current；L1C1Filter circuit is by filter inductance and the first filter capacitor string
Connection composition, filters for power frequency；Resonant coupling circuit by primary compensation capacitor, primary side shielded layer, primary side inductance, secondary inductance,
It is secondary while shielded layer, first it is secondary while compensating electric capacity or the second secondary side compensating electric capacity electrical connection composition, for energy to be transmitted from primary side
To secondary side, to be load supplying, the mutual inductance between primary side inductance and secondary inductance is between primary side inductance and secondary inductance
Transmission range and change；Primary side shielded layer and secondary side shielded layer weaken for improving the device coefficient of coup and improving efficiency of transmission
The electromagnetic interference of primary side inductance and secondary inductance to former and deputy side circuit board；First pair compensates electricity when compensating electric capacity and second are secondary
Appearance can switch mutually, if switching to the first secondary side compensating electric capacity, primary compensation capacitor and the first secondary side compensating electric capacity composition
Primary side secondary side series connection (PS) collocation structure output in parallel shows as constant pressure source, the equipment for being applicable to constant pressure power supply, if switching
At the second secondary side compensating electric capacity, then primary compensation capacitor and second secondary when compensating electric capacity composition primary side is in parallel secondary (PP) in parallel are mended
Compensation structure output shows as constant-current source, the equipment for being applicable to constant current-supplying；Main switch, first diode and drop-down auxiliary
For switching branches for realizing electric energy inversion, first diode is the anti-paralleled diode of main switch；Auxiliary switch, the two or two
Pole pipe and clamp capacitor are electrically connected composition according to electrical principles and pull down auxiliary switch branch, for reducing main switch drain-source
The voltage at both ends, wherein the second diode is the anti-paralleled diode of auxiliary switch；Auxiliary switch and main switch switch
Frequency is identical, and there are dead zones for the conducting of auxiliary switch and main switch, and the turn-on time of auxiliary switch is short, conduction loss compared with
It is small；Second rectifier bridge is for rectifying high-frequency alternating current, and the second filter capacitor is used for High frequency filter, and equivalent load is capacitive
Load or inductive load；Primary-side-control circuit includes first singlechip control circuit, driving circuit, the first accessory power supply, first
Radio communication circuit, first voltage detection circuit, remote controler, second voltage detection circuit, primary-side-control circuit make main switch
It realizes that no-voltage opens control with auxiliary switch, and makes device output voltage stabilization or outputting current steadily, wherein first is single
The master that signal of communication that piece machine control circuit is received according to the first radio communication circuit, first voltage detection circuit detect opens
The voltage signal of clamp capacitor that the voltage signal and second voltage detection circuit for closing pipe detect, export respectively main switch and
The control signal of auxiliary switch, control signal drive main switch and auxiliary switch after driving circuit isolation amplification；The
One accessory power supply is first singlechip control circuit and drive circuitry；First radio communication circuit receives the second wireless communication
The control signal that the feedback signal and remote controler that circuit issues issue, the first radio communication circuit are run to remote controler emitter
Status signal；First voltage detection circuit is used to detect the voltage at main switch drain-source both ends；Remote controler is according to received
The device operating state signal that one radio communication circuit issues, display device output voltage export electric current and whether realize zero electricity
It presses off logical；Remote controler makes first singlechip control circuit select Isobarically Control to the first radio communication circuit emissioning controling signal
Or current constant control；Second voltage detection circuit detects the voltage at clamp capacitor both ends, when the voltage for detecting clamp capacitor both ends
Increase, the control signal of auxiliary switch is become high level by first singlechip control circuit, and auxiliary switch realizes no-voltage
Open-minded, when the voltage at clamp capacitor both ends increases, primary side inductance is clamp capacitor charging, the two or two pole by the second diode
Pipe conducting, the voltage at auxiliary switch drain-source both ends are 0, and auxiliary switch realizes that no-voltage is open-minded；Secondary side control circuit is by adopting
Sample circuit, second singlechip control circuit, the second accessory power supply and the second radio communication circuit composition, for giving primary-side-control electricity
Road emits feedback signal, the output voltage and output electric current of sample circuit detection device；Second singlechip control circuit is according to connecing
The signal of the sample circuit received, the second radio communication circuit of control emit feedback signal to the first radio communication circuit；Second
Accessory power supply is the power supply of second singlechip control circuit.
Compared with prior art, the present invention using the ICPT device with drop-down 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 increases auxiliary switch, and turn-on time is short, and can realize Sofe Switch control, makes whole
A device loss is smaller；Increase drop-down auxiliary switch branch, make main switch bear voltage reduce by 1/3, make main switch and
The MOSFET that price is low, switching frequency is up to 83kHz or more can be used in auxiliary switch, so that switching frequency meets national mark
Standard is conducive to application so that the volume of loosely coupled transformer also accordingly reduces；It is controlled using frequency conversion+variable duty cycle,
It realizes that no-voltage is open-minded, stabilizes the output voltage or export electric current, improve the reliability of device, be conducive to application；According to not
Same load is switched using different collocation structures and corresponding PWM and PFM control if load needs constant pressure to power
At the first secondary side compensating electric capacity, that is, the collocation structure of PS is used, while using constant pressure control method；If load needs constant current to supply
Electricity then switches to the second secondary side compensating electric capacity, that is, uses the collocation structure of PP, while using constant current control method.
Detailed description of the invention:
Fig. 1 is the main structure circuit theory schematic diagram of the ICPT device of the present invention with drop-down auxiliary switch.
Fig. 2 is the process flow diagram that the present invention realizes electric energy transmission control.
Fig. 3 is the work electric signal waveform figure of device of the present invention, and wherein Ugs1 is main switch Q1Driving voltage,
Ugs2 is auxiliary switch Q2Driving voltage, Uds1 be main switch Q1The voltage at drain-source both ends, Uds2 are auxiliary switch Q2
The voltage at drain-source both ends, Up are primary compensation capacitor CpThe voltage at both ends, Ip are primary inductor LpElectric current, Uc is clamp capacitor
CcThe voltage at both ends.
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 method that the present embodiment uses the ICPT device with drop-down auxiliary switch to realize electric energy transmission control, including it is following
Step:
(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, using the collocation structure of PP, select constant current control method；If neither selection constant pressure power supply,
Constant current-supplying is not selected, then 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 not
Become, 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, and 15 output voltage signals detected of sample circuit are sent to second singlechip control circuit
16, second singlechip control circuit 16 changes according to the difference of output voltage, by the second radio communication circuit 18 to primary side control
Circuit 6 processed issues different control signals, and the first radio communication circuit 11 in primary-side-control circuit 6 receives the second channel radio
Believe the signal that circuit 18 issues, then pass to first singlechip control circuit 8, first singlechip control circuit 8 adjusts device
Switching frequency；If output voltage becomes larger, second singlechip control circuit 16 can be by the second radio communication circuit 18 to primary side
Control circuit 6 issues the signal for increasing switching frequency；If output voltage reduces, second singlechip control circuit 16 passes through the second nothing
Line telecommunication circuit 18 issues the signal for reducing switching frequency to primary-side-control circuit 6, thus the output voltage of stabilising arrangement；When
Two voltage detecting circuits 14 detect clamp capacitor CcThe voltage at both ends increases, and first singlechip control circuit 8 is auxiliary switch
Pipe Q2Control signal become high level, auxiliary switch Q2It realizes that no-voltage is open-minded, detects main switch Q1It whether is no-voltage
It is open-minded, main switch Q1If not no-voltage is open-minded, is controlled by PWM and realize that no-voltage is open-minded, as main switch Q1Driving letter
When number becoming high level from low level, first voltage detection circuit 12 detects main switch Q1The voltage at drain-source both ends, if master opens
Close pipe Q1The voltage at drain-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 master and opens
Close pipe Q1Duty ratio；If main switch Q1The voltage at drain-source both ends is 0, that is, it is open-minded to realize no-voltage, then main switch Q1's
Duty ratio is constant；As main switch Q1After realizing that no-voltage is opened, whether judgment means are shut down, if providing stopping signal, fill
It sets and stops working；If not providing stopping signal, output voltage is detected again, is repeated the above steps；
(3) if, selection constant current-supplying, use PWM soft start first, i.e., given original switching frequency keeps switching frequency
Constant, turn-on time is gradually increased to setting value, and output electric current reaches setting electric current；When the output electric current of device is unstable,
It is controlled by PFM and stablizes output electric current, 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 processed issues different control signals, and the first radio communication circuit 11 in primary-side-control circuit 6 receives the second channel radio
Believe the signal that circuit 18 issues, then pass to first singlechip control circuit 8, first singlechip control circuit 8 adjusts device
Switching frequency；If output electric current becomes larger, second singlechip control circuit 16 passes through the second radio communication circuit 18 to primary-side-control
Circuit 6 issues the signal for increasing switching frequency；If exporting electric current to reduce, second singlechip control circuit 16 passes through the second channel radio
Believe that circuit 18 issues the signal for reducing switching frequency to primary-side-control circuit 6, thus the output electric current of stabilising arrangement；When the second electricity
Pressure detection circuit 14 detects clamp capacitor CcThe voltage at both ends increases, and first singlechip control circuit 8 is auxiliary switch Q2's
Control signal becomes high level, auxiliary switch Q2It realizes that no-voltage is open-minded, detects main switch Q1It whether is that no-voltage is open-minded,
Main switch 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
When low level becomes high level, first voltage detection circuit 12 detects main switch Q1The voltage at drain-source both ends, if main switch Q1
The voltage at drain-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
Duty ratio；If main switch Q1The voltage at drain-source both ends is 0, that is, it is open-minded to realize no-voltage, 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
Work；If not providing stopping signal, detection output electric current, repeats the above steps again；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 main structure of ICPT device with drop-down auxiliary switch described in the present embodiment includes the first rectifier bridge 1, L1C1Filter
Wave circuit 2, resonant coupling circuit 3, main switch Q1, first diode DQ1, drop-down auxiliary switch branch 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 drop-down auxiliary switch branch 4 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 3pBoth ends, resonant coupling circuit
Secondary inductance L in 3sBoth 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；The both ends of first rectifier bridge 1 respectively with 220VacAnd L1C1Filter circuit 2 is electrically connected,
For industrial-frequency alternating current to be rectified；L1C1Filter circuit 2 is by filter inductance L1With the first filter capacitor C1It is composed in series, uses
It is filtered in power frequency；Resonant coupling circuit 3 is by primary compensation capacitor Cp, primary side shielded layer Sp, primary inductor Lp, secondary inductance Ls, it is secondary
Side shielded layer Ss, the first pair side compensating electric capacity CsOr the second pair side compensating electric capacity CtElectrical connection composition, for passing energy from primary side
It is delivered to secondary side, to be load supplying, 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 improving the device coefficient of coup and improving efficiency of transmission,
Weaken primary inductor LpWith secondary inductance LsTo the electromagnetic interference of former and deputy side circuit board；First pair side compensating electric capacity 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 secondary 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 mate side compensating electric capacity Ct, then primary compensation capacitor CpWith the second pair side compensating electric capacity CtComposition PP collocation structure output is shown as
Constant-current source, the equipment for being applicable to constant current-supplying；Main switch Q1, first diode DQ1It is used with drop-down auxiliary switch branch 4
In realization electric energy inversion, first diode DQ1For main switch Q1Anti-paralleled diode.Auxiliary switch Q2, the second diode
DQ2With clamp capacitor CcIt is electrically connected composition drop-down auxiliary switch branch 4 according to electrical principles, for reducing main switch Q1
The 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, auxiliary switch Q2Conduction loss it is smaller；Second rectifier bridge 5 is for rectifying high-frequency alternating current, the second filter
Wave capacitor C2For High frequency filter, equivalent load Z is capacitive load or inductive load；Primary-side-control circuit 6 includes the first monolithic
It is machine control circuit 8, driving circuit 9, the first accessory power supply 10, the first radio communication circuit 11, first voltage detection circuit 12, distant
Device 13, second voltage detection circuit 14 are controlled, primary-side-control circuit 6 makes main switch Q1With auxiliary switch Q2Realize that no-voltage is opened
Logical control, and make device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit 8 is according to the first nothing
The main switch Q that signal of communication that line telecommunication circuit 11 receives, first voltage detection circuit 12 detect1Voltage signal and
The clamp capacitor C that second voltage detection circuit 14 detectscVoltage signal, respectively export main switch Q1And auxiliary switch
Q2Control signal, control signal through driving circuit 9 isolation amplification after drive main switch Q1With auxiliary switch Q2；First is auxiliary
Helping power supply 10 is that first singlechip control circuit 8 and driving circuit 9 are powered；First radio communication circuit 11 receives the second channel radio
Believe the feedback signal that circuit 18 issues and the control signal that remote controler 13 issues, the first radio communication circuit 11 is sent out to remote controler 13
Injection device operating state signal；First voltage detection circuit 12 is for detecting main switch Q1The voltage at drain-source both ends；Remote controler
The 13 device operating state signals issued according to the first radio communication circuit 11 received, display device output voltage, output
Electric current and whether realize that no-voltage is open-minded；Remote controler 13 makes the first monolithic to 11 emissioning controling signal of the first radio communication circuit
Machine control circuit 8 selects Isobarically Control or current constant control；Second voltage detection circuit 14 detects clamp capacitor CcThe voltage at both ends,
When detecting clamp capacitor CcThe voltage at both ends increases, and first singlechip control circuit 8 is auxiliary switch Q2Control signal become
For high level, auxiliary switch Q2Realize that no-voltage is open-minded, as clamp capacitor CcWhen the voltage at both ends increases, primary inductor LpIt is logical
Cross the second diode DQ2For clamp capacitor CcCharging, the second diode DQ2Conducting, auxiliary switch Q2The voltage at drain-source both ends is
0, auxiliary switch Q2, realize that no-voltage is open-minded；Secondary side control circuit 7 by sample circuit 15, second singlechip control circuit 16,
Second accessory power supply 17 and the second radio communication circuit 18 composition, for emitting feedback signal, sampling electricity to primary-side-control circuit 6
The output voltage and output electric current of 15 detection device of road；Second singlechip control circuit 16 is according to the sample circuit 15 received
Signal, the second radio communication circuit 18 of control emit feedback signal to the first radio communication circuit 11；Second accessory power supply 17 is
Second singlechip control circuit 16 is powered.
The overall work process for the ICPT device with drop-down 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 add the first filter capacitor C1Voltage be less than clamp capacitor CcVoltage, the two or two pole
Pipe DQ2Reversed cut-off, arrives the t4 moment, primary compensation capacitor CpVoltage add the first filter capacitor C1Voltage be greater than clamper electricity
Hold 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 inductively coupled power transfer control method with drop-down auxiliary switch, it is characterised in that: using with drop-down
The inductively coupled power transfer device realization of auxiliary switch, specifically includes the following steps:
(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 the concatenated collocation structure in primary side secondary side in parallel；If load needs constant current to supply
Electricity then switches to the second secondary side compensating electric capacity, using the collocation structure of primary side secondary side parallel connection in parallel, selects constant current control method；
If neither selection constant pressure power supply, does not also select constant current-supplying, then 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 switch frequency
Rate is constant, and turn-on time is gradually increased to setting value, and output voltage reaches setting voltage, when device output voltage is unstable,
It is stabilized the output voltage by pulse frequency modulated control, the output voltage signal detected is sent to the second monolithic by sample circuit
Machine control circuit, second singlechip control circuit changes according to the difference of output voltage, by the second radio communication circuit to original
Side control circuit issues different control signals, and the first radio communication circuit in primary-side-control circuit receives the second channel radio
Believe the signal that circuit issues, then pass to first singlechip control circuit, first singlechip control circuit adjusts opening for device
Close frequency；If output voltage becomes larger, second singlechip control circuit can be by the second radio communication circuit to primary-side-control circuit
Issue the signal for increasing switching frequency；If output voltage reduces, second singlechip control circuit passes through the second radio communication circuit
The signal for reducing switching frequency is issued to primary-side-control circuit, thus the output voltage of stabilising arrangement；When second voltage detects electricity
Road detects that the voltage at clamp capacitor both ends increases, and the control signal of auxiliary switch is become high by first singlechip control circuit
Level, auxiliary switch realize that no-voltage is open-minded, and whether detection main switch is that no-voltage is open-minded, and main switch is if not zero electricity
It presses off logical, is controlled by PWM and realize that no-voltage is open-minded, when the driving signal of main switch becomes high level from low level, the
The voltage at one voltage detecting circuit detection main switch drain-source both ends does not have if the voltage at main switch drain-source both ends is not 0
Realize that no-voltage is open-minded, then first singlechip control circuit reduces the duty ratio of main switch；If main switch drain-source both ends
Voltage is 0, that is, realizes that 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 shut down, if providing stopping signal, device stops working；If not providing stopping signal, detect again defeated
Voltage out repeats the above steps；
(3) if, selection constant current-supplying, use PWM soft start first, i.e., given original switching frequency keeps switching frequency constant,
Turn-on time is gradually increased to setting value, and output electric current reaches setting electric current；When the output electric current of device is unstable, pass through
Output electric current is stablized in PFM control, and the output current signal detected is sent to second singlechip control circuit by sample circuit, the
Two single chip machine controlling circuits issue difference to primary-side-control circuit by the second radio communication circuit according to the variation of output electric current
Control signal, the first radio communication circuit in primary-side-control circuit receives the signal of the second radio communication circuit sending,
First singlechip control circuit is passed to again, and first singlechip control circuit adjusts the switching frequency of device；If exporting electric current to become
Greatly, second singlechip control circuit issues the letter for increasing switching frequency by the second radio communication circuit to primary-side-control circuit
Number；If exporting electric current to reduce, second singlechip control circuit is subtracted by the second radio communication circuit to the sending of primary-side-control circuit
The signal of small switching frequency, thus the output electric current of stabilising arrangement；When second voltage detection circuit detects clamp capacitor both ends
Voltage increase, the control signal of auxiliary switch is become high level by first singlechip control circuit, and auxiliary switch is realized
No-voltage is open-minded, and whether detection main switch is that no-voltage is open-minded, and 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, that is, realize zero
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 are shut down,
If providing stopping signal, device stops working；If not providing stopping signal, detection output electric current, repeats above-mentioned step again
Suddenly；Whole device stabilizes the output voltage or exports electric current by frequency conversion+variable duty cycle control mode, at the same make main switch and
Auxiliary switch realizes that no-voltage is open-minded, achievees the purpose that inductively coupled power transfer regulates and controls.
2. the inductively coupled power transfer control method according to claim 1 with drop-down auxiliary switch, it is characterised in that:
The inductively coupled power transfer device with drop-down auxiliary switch is bipolar with LC resonance single-tube contravariant in existing ICPT device
Property inverter topology in increase by one group of drop-down auxiliary switch branch, specific structure includes the first rectifier bridge, L1C1Filter circuit,
Resonant coupling circuit, main switch, first diode, drop-down auxiliary switch branch, the second rectifier bridge, the second filter capacitor, etc.
Effect load, primary-side-control circuit and secondary side control circuit；220VacThrough the first rectifier bridge, L1C1Direct current is converted into after filter circuit
Voltage, main switch, first diode and drop-down auxiliary switch branch are by DC inverter at high-frequency alternating current, high-frequency alternating current
The both ends of primary side inductance in resonant coupling circuit are applied to, secondary inductance both ends induce voltage, secondary side in resonant coupling circuit
Voltage across the inductor is converted into direct current after the second rectifier bridge, the second filter capacitor, powers for equivalent load；First rectifier bridge
Industrial-frequency alternating current is rectified；L1C1Filter circuit is composed in series by filter inductance and the first filter capacitor, is filtered for power frequency
Wave；Resonant coupling circuit is by primary compensation capacitor, primary side shielded layer, primary side inductance, secondary inductance, secondary side shielded layer, the first pair
The compensating electric capacity electrical connection composition when compensating electric capacity or second are secondary, for energy to be transmitted to secondary side from primary side, thus for load
Power supply, the mutual inductance between primary side inductance and secondary inductance change with the transmission range between primary side inductance and secondary inductance；It is former
In shielded layer and pair, shielded layer weakens primary side inductance and secondary inductance for improving the device coefficient of coup and improving efficiency of transmission
To the electromagnetic interference of former and deputy side circuit board；The first secondary compensating electric capacity when compensating electric capacity and second are secondary can switch mutually, if cutting
Change the first secondary side compensating electric capacity into, then primary compensation capacitor and the first pair connect (PS) when compensating electric capacity composition primary side is in parallel secondary
Collocation structure output shows as constant pressure source, the equipment for being applicable to constant pressure power supply, if switching to the second secondary side compensating electric capacity,
Primary compensation capacitor and the second secondary (PP) collocation structure output in parallel when compensating electric capacity composition primary side is in parallel secondary show as constant current
Source, the equipment for being applicable to constant current-supplying；Main switch, first diode and drop-down auxiliary switch branch are for realizing electric energy
Inversion, first diode are the anti-paralleled diode of main switch；After auxiliary switch and the second diodes in parallel again with clamper
Capacitor is composed in series drop-down auxiliary switch branch, for reducing the voltage at main switch drain-source both ends, wherein the second diode is
The anti-paralleled diode of auxiliary switch；Auxiliary switch is identical with main switch switching frequency, auxiliary switch and main switch
There are dead zones for the conducting of pipe, and the turn-on time of auxiliary switch is short, and conduction loss is smaller；Second rectifier bridge is used for 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, second voltage detection circuit, primary-side-control circuit make main switch and auxiliary switch realize that no-voltage opens control
System, and make device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit is according to the first wireless communication
Voltage signal and the second voltage detection for the main switch that signal of communication that circuit receives, first voltage detection circuit detect
The voltage signal for the clamp capacitor that circuit detects exports the control signal of main switch and auxiliary switch, control letter respectively
Number main switch and auxiliary switch are driven after driving circuit isolation amplification；First accessory power supply is first singlechip control electricity
Road and drive circuitry；First radio communication circuit receives the feedback signal that the second radio communication circuit issues and remote controler hair
Control signal out, the first radio communication circuit is to remote controler emitter operating state signal；First voltage detection circuit is used
Voltage in detection main switch drain-source both ends；Remote controler is run according to the device that the first radio communication circuit received issues
Status signal, display device output voltage export electric current and whether realize that no-voltage is open-minded；Remote controler is electric to the first wireless communication
Road emissioning controling signal makes first singlechip control circuit selection Isobarically Control or current constant control；The inspection of second voltage detection circuit
The voltage for surveying clamp capacitor both ends, when the voltage for detecting clamp capacitor both ends increases, first singlechip control circuit is auxiliary
The control signal of switching tube becomes high level, and auxiliary switch realizes that no-voltage is open-minded, when the voltage at clamp capacitor both ends increases
When, primary side inductance is clamp capacitor charging, the second diode current flow, the electricity at auxiliary switch drain-source both ends by the second diode
Pressure is 0, and auxiliary switch realizes that no-voltage is open-minded；Secondary side control circuit is by sample circuit, second singlechip control circuit, second
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 electric current set；Signal of the second singlechip control circuit according to the sample circuit received, control second
Radio communication circuit emits feedback signal to the first radio communication circuit；Second accessory power supply is the confession of second singlechip control circuit
Electricity.
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| CN110544975A (en) * | 2019-09-27 | 2019-12-06 | 青岛大学 | single-tube constant-current constant-voltage wireless charging device and control method thereof |
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| TW201405995A (en) * | 2012-07-24 | 2014-02-01 | Powerwow Technology Inc | Inductive power transmission apparatus and non-contact inductive power transmission system |
| CN103580301B (en) * | 2013-10-30 | 2016-04-27 | 青岛大学 | A kind of wireless power transmission power control system and method |
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