CN107134927B - A kind of inductively coupled power transfer device with drop-down auxiliary switch - Google Patents
A kind of inductively coupled power transfer device with drop-down auxiliary switch Download PDFInfo
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- CN107134927B CN107134927B CN201710399479.4A CN201710399479A CN107134927B CN 107134927 B CN107134927 B CN 107134927B CN 201710399479 A CN201710399479 A CN 201710399479A CN 107134927 B CN107134927 B CN 107134927B
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- 239000003990 capacitor Substances 0.000 claims description 71
- 238000004891 communication Methods 0.000 claims description 56
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- 230000005611 electricity Effects 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
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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)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention belongs to electroporation fields, it is related to a kind of inductively coupled power transfer device with drop-down auxiliary switch, increase by one group of drop-down 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, allow 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, for the volume and weight for further decreasing ICPT device, reduces cost and technical solution is provided.
Description
Technical field:
The invention belongs to electroporation fields, are related to a kind of inductively coupled power transfer dress with drop-down auxiliary switch
It sets, the transmission occasion using auxiliary switch branch for inductively electric energy.
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 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 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.
The main structure of ICPT device of the present invention with drop-down auxiliary switch includes the first rectifier bridge, L1C1Filtering
Circuit, resonant coupling circuit, main switch, first diode, drop-down auxiliary switch branch, the second rectifier bridge, the second filtered electrical
Appearance, equivalent load, primary-side-control circuit and secondary side control circuit；220VacThrough the first rectifier bridge, L1C1It is converted into after filter circuit
DC voltage, by DC inverter at high-frequency alternating current, high frequency is handed over for main switch, first diode and drop-down auxiliary switch branch
Galvanic electricity is applied to the both ends of primary side inductance in resonant coupling circuit, and secondary inductance both ends induce voltage in resonant coupling circuit,
Secondary inductance both end voltage is converted into direct current after the second rectifier bridge, the second filter capacitor, powers for equivalent load；First is whole
Stream bridge rectifies industrial-frequency alternating current；L1C1Filter circuit is composed in series by filter inductance and the first filter capacitor, is used for power frequency
Filtering；Resonant coupling circuit is by primary compensation capacitor, primary side shielded layer, primary side inductance, secondary inductance, secondary side shielded layer, first
The secondary 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, to be negative
Power supply is carried, the mutual inductance between primary side inductance and secondary inductance changes with the transmission range between primary side inductance and secondary inductance；
Primary side shielded layer and secondary side shielded layer weaken primary side inductance and secondary side electricity for improving the device coefficient of coup and improving efficiency of transmission
Feel the electromagnetic interference to former and deputy side circuit board；The first secondary compensating electric capacity when compensating electric capacity and second are secondary can switch mutually, if
The first secondary side compensating electric capacity is switched to, then primary compensation capacitor and the first pair are connected when compensating electric capacity composition primary side is in parallel secondary
(PS) 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 compensation electricity
Hold, then primary compensation capacitor and the second secondary (PP) collocation structure output in parallel when compensating electric capacity composition primary side is in parallel secondary are shown as
Constant-current source, the equipment for being applicable to constant current-supplying；Main switch, first diode and drop-down auxiliary switch branch for realizing
Electric energy inversion, first diode are the anti-paralleled diode of main switch；Auxiliary switch, the second diode and clamp capacitor are pressed
It is electrically connected composition drop-down auxiliary switch branch according to electrical principles, for reducing the voltage at main switch drain-source both ends, wherein
Second diode is the anti-paralleled diode of auxiliary switch；Auxiliary switch is identical with main switch switching frequency, and auxiliary is opened
There are dead zones for the conducting of pass pipe and main switch, and the turn-on time of auxiliary switch is short, and conduction loss is smaller；Second rectifier bridge is used
It is rectified in high-frequency alternating current, 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, the first radio communication circuit,
One voltage detecting circuit, remote controler, second voltage detection circuit, primary-side-control circuit realize main switch and auxiliary switch
No-voltage opens control, and makes device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit according to
The voltage signal for the main switch that signal of communication that first radio communication circuit receives, first voltage detection circuit detect and
The voltage signal for the clamp capacitor that second voltage detection circuit detects exports the control of main switch and auxiliary switch respectively
Signal, control signal drive main switch and auxiliary switch after driving circuit isolation amplification；First accessory power supply is first
Single chip machine controlling circuit and drive circuitry；First radio communication circuit receives the feedback letter that the second radio communication circuit issues
Number and the control signal that issues of remote controler, the first radio communication circuit is to remote controler emitter operating state signal；First electricity
Pressure detection circuit is used to detect the voltage at main switch drain-source both ends；Remote controler is sent out according to the first radio communication circuit received
Device operating state signal out, display device output voltage export electric current and whether realize that no-voltage is open-minded；Remote controler is to
One radio communication circuit emissioning controling signal makes first singlechip control circuit selection Isobarically Control or current constant control；Second electricity
The voltage for pressing detection circuit detection clamp capacitor both ends, when the voltage increase for detecting clamp capacitor both ends, first singlechip control
The control signal of auxiliary switch is become high level by circuit processed, and auxiliary switch realizes that no-voltage is open-minded, when clamp capacitor two
When the voltage at end increases, primary side inductance is clamp capacitor charging, the second diode current flow, auxiliary switch by the second diode
The voltage at drain-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 are adopted for giving primary-side-control circuit transmission feedback signal
The output voltage and output electric current of sample 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 use with drop-down auxiliary switch ICPT device realize electric energy transmission control method, specifically include with
Lower 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 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.
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 apparatus of the present invention.
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 main structure for the ICPT device with drop-down auxiliary switch that the present embodiment is related to includes the first rectifier bridge 1, L1C1
Filter circuit 2, resonant coupling circuit 3, main switch Q1, first diode DQ1, drop-down auxiliary switch branch 4, the second rectifier bridge
5, the second filter capacitor C2, equivalent load Z, primary-side-control circuit 6 and secondary side control circuit 7；220VacThrough the first rectifier bridge 1,
L1C1DC voltage, main switch Q are converted into after filter circuit 21, first diode DQ1With drop-down auxiliary switch branch 4 by direct current
Electricity is reverse into high-frequency alternating current, and high-frequency alternating current is applied to primary inductor L in resonant coupling circuit 3pBoth ends, resonance coupling electricity
Secondary inductance L in road 3sBoth ends induce voltage, secondary inductance LsBoth end voltage is through the second rectifier bridge 5, the second filter capacitor C2Afterwards
It is converted into direct current, is powered for equivalent load Z；The both ends of first rectifier bridge 1 respectively with 220VacAnd L1C1Filter circuit 2 is electrically connected
It connects, 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,
It is filtered for power frequency；Resonant coupling circuit 3 is by primary compensation capacitor Cp, primary side shielded layer Sp, primary inductor Lp, secondary inductance Ls、
Secondary side shielded layer Ss, the first pair side compensating electric capacity CsOr the second pair side compensating electric capacity CtElectrical connection composition, for by energy from primary side
It is transmitted to secondary side, to be load supplying, wherein M is primary inductor LpWith secondary inductance LsBetween mutual inductance, M is with LpAnd LsIt
Between transmission range and change；Primary side shielded layer SpWith secondary side shielded layer SsFor improving the device coefficient of coup and improving transmission effect
Rate weakens primary inductor LpWith secondary inductance LsTo the electromagnetic interference of former and deputy side circuit board；First pair side compensating electric capacity CsWith
Second mate side compensating electric capacity CtIt can switch mutually, if switching to the first pair side compensating electric capacity Cs, then primary compensation capacitor CpWith 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
At the second pair side compensating electric capacity Ct, then primary compensation capacitor CpWith the second pair side compensating electric capacity CtIt forms PP collocation structure and exports table
It is now constant-current source, the equipment for being applicable to constant current-supplying；Main switch Q1, first diode DQ1With drop-down auxiliary switch branch
4 for realizing electric energy inversion, first diode DQ1For main switch Q1Anti-paralleled diode.Auxiliary switch Q2, the two or two
Pole pipe DQ2With clamp capacitor CcIt is electrically connected composition drop-down auxiliary switch branch 4 according to electrical principles, for reducing main switch
Pipe Q1The voltage at drain-source both ends, wherein the second diode DQ2For auxiliary switch Q2Anti-paralleled diode；Auxiliary switch Q2With
Main switch Q1Switching frequency is identical, auxiliary switch Q2With main switch Q1Conducting there are dead zone, auxiliary switch Q2Lead
The logical time is short, auxiliary switch Q2Conduction loss it is smaller；Second rectifier bridge 5 is for rectifying high-frequency alternating current, and second
Filter capacitor C2For High frequency filter, equivalent load Z is capacitive load or inductive load；Primary-side-control circuit 6 includes first single
Piece machine control 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, second voltage detection circuit 14, primary-side-control circuit 6 make main switch Q1With auxiliary switch Q2Realize no-voltage
Control is opened, and makes device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit 8 is according to first
The main switch Q that signal of communication that radio communication 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
Pipe Q2Control signal, control signal through driving circuit 9 isolation amplification after drive main switch Q1With auxiliary switch Q2；First
Accessory power supply 10 is that first singlechip control circuit 8 and driving circuit 9 are powered；It is wireless that first radio communication circuit 11 receives second
The control signal that the feedback signal and remote controler 13 that telecommunication circuit 18 issues issue, the first radio communication circuit 11 is to remote controler 13
Emitter operating state signal；First voltage detection circuit 12 is for detecting main switch Q1The voltage at drain-source both ends；Remote control
The device operating state signal that device 13 is issued according to the first radio communication circuit 11 for receiving, it is display device output voltage, defeated
Electric current and whether realize that no-voltage is open-minded out；Remote controler 13 makes the first list to 11 emissioning controling signal of the first radio communication circuit
Piece machine control circuit 8 selects Isobarically Control or current constant control；Second voltage detection circuit 14 detects clamp capacitor CcThe electricity at both ends
Pressure, when detecting 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 Q2Realize that no-voltage is open-minded, as clamp capacitor CcWhen the voltage at both ends increases, primary side inductance
LpPass through the second diode DQ2For clamp capacitor CcCharging, the second diode DQ2Conducting, auxiliary switch Q2The electricity at drain-source both ends
Pressure is 0, auxiliary switch Q2, realize that no-voltage is open-minded；Secondary side control circuit 7 controls electricity by sample circuit 15, second singlechip
Road 16, the second accessory power supply 17 and the second radio communication circuit 18 composition, for emitting feedback signal to primary-side-control circuit 6,
The output voltage and output electric current of 15 detection device of sample circuit；Second singlechip control circuit 16 is according to the sampling electricity received
The signal on road 15, the second radio communication circuit 18 of control emit feedback signal to the first radio communication circuit 11；Second auxiliary electricity
Source 17 is the power supply of second singlechip control circuit 16.
The method that the ICPT device with drop-down auxiliary switch that the present embodiment is related to realizes electric energy transmission control, including with
Lower 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 realizes 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 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 device with drop-down auxiliary switch, it is characterised in that: used in existing ICPT device
Increase by one group of drop-down auxiliary switch branch in LC resonance single-tube contravariant bipolarity inverter topology, specific structure 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 side series compensation structure output in parallel secondary 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, then primary compensation capacitor and the second secondary shunt compensation structure when compensating electric capacity composition primary side is in parallel secondary are defeated
Constant-current source is shown as out, the equipment for being applicable to constant current-supplying；Main switch, first diode and drop-down auxiliary switch branch
For realizing electric energy inversion, first diode is the anti-paralleled diode of main switch；Auxiliary switch and the second diode are simultaneously
It is composed in series drop-down auxiliary switch branch after connection with clamp capacitor again, for reducing the voltage at main switch drain-source both ends, wherein
Second diode is the anti-paralleled diode of auxiliary switch；Auxiliary switch is identical with main switch switching frequency, and auxiliary is opened
There are dead zones for the conducting of pass pipe and main switch, and the turn-on time of auxiliary switch is short, and conduction loss is smaller；Second rectifier bridge is used
It is rectified in high-frequency alternating current, 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, the first radio communication circuit,
One voltage detecting circuit, remote controler, second voltage detection circuit, primary-side-control circuit realize main switch and auxiliary switch
No-voltage opens control, and makes device output voltage stabilization or outputting current steadily, wherein first singlechip control circuit according to
The voltage signal for the main switch that signal of communication that first radio communication circuit receives, first voltage detection circuit detect and
The voltage signal for the clamp capacitor that second voltage detection circuit detects exports the control of main switch and auxiliary switch respectively
Signal, control signal drive main switch and auxiliary switch after driving circuit isolation amplification；First accessory power supply is first
Single chip machine controlling circuit and drive circuitry；First radio communication circuit receives the feedback letter that the second radio communication circuit issues
Number and the control signal that issues of remote controler, the first radio communication circuit is to remote controler emitter operating state signal；First electricity
Pressure detection circuit is used to detect the voltage at main switch drain-source both ends；Remote controler is sent out according to the first radio communication circuit received
Device operating state signal out, display device output voltage export electric current and whether realize that no-voltage is open-minded；Remote controler is to
One radio communication circuit emissioning controling signal makes first singlechip control circuit selection Isobarically Control or current constant control；Second electricity
The voltage for pressing detection circuit detection clamp capacitor both ends, when the voltage increase for detecting clamp capacitor both ends, first singlechip control
The control signal of auxiliary switch is become high level by circuit processed, and auxiliary switch realizes that no-voltage is open-minded, when clamp capacitor two
When the voltage at end increases, primary side inductance is clamp capacitor charging, the second diode current flow, auxiliary switch by the second diode
The voltage at drain-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 are adopted for giving primary-side-control circuit transmission feedback signal
The output voltage and output electric current of sample 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.
2. the inductively coupled power transfer device according to claim 1 with drop-down auxiliary switch, it is characterised in that: use
The method that the device realizes electric energy transmission control, 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.
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| CN107742980B (en) * | 2017-10-30 | 2020-01-17 | 成都芯源系统有限公司 | Voltage stabilizer, and loop automatic adjusting system and method thereof |
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