CN106532977B - Control device and radio energy transmission system based on radio energy transmission system - Google Patents
Control device and radio energy transmission system based on radio energy transmission system Download PDFInfo
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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
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Abstract
The present invention relates to control devices and radio energy transmission system based on radio energy transmission system, the system includes main circuit and control device, control device includes: current detection module, control module, Zero-cross comparator output module, square-wave signal generation module, and driving signal generation module, when emitting end loop does not have electric current, control module exports initial p WM signal and corresponding control signal, control device is according to initial p WM signal come control switch pipe, make to emit in end loop and has electric current, then, control device stops response initial p WM signal, and under the action of the corresponding control signal of control module output, square-wave signal generation module generates the square-wave signal with current in phase position according to the corresponding output signal of Zero-cross comparator output module, driving signal generation module generates switch according to square-wave signal Pipe driving signal, is controlled with switch tube.So the control device reliability is higher.
Description
Technical field
The present invention relates to control devices and radio energy transmission system based on radio energy transmission system, belong to radio
It can transmission field.
Background technique
Magnet coupled resonant type wireless electric energy transmission technology is the electromagnetic system using two with identical resonance frequency, in phase
When at a certain distance, the technology that resonance carries out energy transmission is occurred by transmitting terminal and reception end-coil.
As shown in Fig. 1-a to 1-d, according to the connection type of resonant capacitance and resonance coil, the topology of wireless power transmission
Structure usually has 4 kinds: transmitting terminal series resonance, receiving end series resonance (S/S)；Transmitting terminal series resonance, receiving end parallel connection are humorous
It shakes (S/P)；Transmitting terminal parallel resonance, receiving end series resonance (P/S)；Transmitting terminal parallel resonance, receiving end parallel resonance (P/
P)。
So the electric energy that transmitting terminal issues is alternating current by above-mentioned it is found that when carrying out wireless power transmission, and
For by the electric energy exported after bridge circuit, complies with the condition of wireless transmission by controlling accordingly and can be passed
It is defeated.Therefore, transmitting terminal can be divided into several situations: direct current is controllable AC voltage, energy by exporting after bridge inverter main circuit
Enough carry out wireless power transmission；Alternatively, alternating current is controllable AC by exporting after AC-AC circuit or AC-DC-AC circuit
Electricity is able to carry out wireless power transmission or other more complicated structures.
Fig. 2 gives a kind of embodiment, is S/S type topology, specially direct current input+transmitting terminal bridge circuit+series connection
The topological structure of resonance, wherein transmitting terminal bridge circuit is full bridge inverter, passes through switching tube in control full bridge inverter
Open and turn off, make transmitting terminal coil working near its resonance frequency, thus emitted energy, also there is resonance frequency in receiving end
Coil identical with transmitting terminal receives energy, to realize the wireless transmission of energy.
The driving signal opened with turned off by controlling tetra- switching tubes of A, B, C, D (metal-oxide-semiconductor or IGBT), to control hair
It penetrates end power circuit and carries out power output, receiving end receives corresponding electric power signal, realizes the wireless transmission of electric energy.But mesh
The preceding control device for controlling this four switching tubes can only simply implement on-off control, and reliability is lower.
Summary of the invention
The object of the present invention is to provide a kind of control devices based on radio energy transmission system, to solve existing control
The lower problem of device reliability processed.Present invention simultaneously provides a kind of radio energy transmission systems.
To achieve the above object, the solution of the present invention includes: a kind of control device based on radio energy transmission system, packet
It includes: for acquiring the current detection module of transmitting terminal loop current, for exporting the control mould of control signal and initial p WM signal
Block, Zero-cross comparator output module, square-wave signal generation module and driving signal generation module, the current detection module are defeated
The control module and the Zero-cross comparator output module are connected out, and the control module and the output of Zero-cross comparator output module connect
The corresponding input terminal of the square-wave signal generation module is connect, the output end of the square-wave signal generation module connects the driving
The input terminal of signal generator module；
When emitting end loop does not have electric current, control module exports initial p WM signal and corresponding control signal, the control
For device processed according to initial p WM signal come control switch pipe, making to emit in end loop has electric current, and then, control device stops ringing
Should initial p WM signal, and control module output corresponding control signal under the action of, square-wave signal generation module according to
The corresponding output signal of Zero-cross comparator output module generates the square-wave signal with current in phase position, the driving signal generation module
Switching tube driving signal is generated according to the square-wave signal, is controlled with switch tube.
The square-wave signal generation module includes starting of oscillation unit and phase locked-loop unit, and the control module and Zero-cross comparator are defeated
Module output connects the corresponding input terminal of the starting of oscillation unit out, and the output end of the starting of oscillation unit connects the phaselocked loop list
The input terminal of member, the output end of the phase locked-loop unit is the output end of the square-wave signal generation module.
The starting of oscillation unit includes optocoupler U8 and four NAND gates, the anode connection power supply electricity of the primary side of the optocoupler U8
Source, the cathode of the primary side of the optocoupler U8 are grounded for inputting the control signal, power supply by the secondary side of optocoupler U8, light
Two input terminals of the anode output connection NAND gate U7B on coupling U8 pair side, an input terminal of NAND gate U7C connect the optocoupler
The anode on U8 pair side, another input terminal connect NAND gate for inputting the initial p WM signal, the output end of NAND gate U7B
An input terminal of U7A, another input terminal of NAND gate U7A connect the output end of the Zero-cross comparator output module, and non-
The output end of door U7A and the output end of NAND gate U7C are separately connected two input terminals of NAND gate U7D, the NAND gate U7D's
Output end is the output end of the starting of oscillation unit；
When emitting does not have electric current in end loop, the control signal of the cathode input of the primary side of the optocoupler U8 is high electricity
It is flat, output end output and the consistent signal of initial p WM signal of NAND gate U7D；When emitting has electric current in end loop, the light
The control signal of the cathode input of the primary side of coupling U8 is low level, and another input terminal of the NAND gate U7C inputs initial
Pwm signal forfeiture effect, the consistent signal of signal of the output end output and the output of Zero-cross comparator output module of NAND gate U7D.
The phase locked-loop unit includes chip CD4046 and chip CD4040, described in the output end connection of the starting of oscillation unit
14 feet of chip CD4046,10 feet of the 4 feet output connection chip CD4040 of chip CD4046,7 feet of chip CD4040 are should
The output end of phase locked-loop unit, 3 feet of the 7 feet connection chip CD4046 of chip CD4040；The chip CD4046 is phaselocked loop
Integrated chip, the chip CD4040 are 12 binary system serial counters.
The driving signal generation module includes first for generating the driving signal of driving switch pipe A and switching tube D
Second driving unit of driving unit and the driving signal for generating driving switch pipe B and C.
The structure of first driving unit and the second driving unit is identical, first driving unit include two successively
The CD4098 chip of connection, the output end of phase locked-loop unit connect the input terminal of the first CD4098 chip, the 2nd CD4098 chip
Output end output be used for driving switch pipe A and switching tube D driving signal；Wherein, CD4098 chip is the touching of two-way monostable
Send out device.
The control device further includes tracking amplification module, and the current detection module is defeated by the tracking amplification module
The Zero-cross comparator output module is connected out.
A kind of radio energy transmission system, including main circuit and control device, the main circuit include the bridge-type of transmitting terminal
Circuit, the control device control connect the switching tube on bridge circuit, and the control device includes: to return for acquiring transmitting terminal
The current detection module of road electric current, for exporting the control module of control signal and initial p WM signal, Zero-cross comparator exports mould
Block, square-wave signal generation module and driving signal generation module, the current detection module output connect the control module
With the Zero-cross comparator output module, the control module and the output of Zero-cross comparator output module connect the square-wave signal and generate
The corresponding input terminal of module, the output end of the square-wave signal generation module connect the input of the driving signal generation module
End；
When emitting end loop does not have electric current, control module exports initial p WM signal and corresponding control signal, the control
For device processed according to initial p WM signal come control switch pipe, making to emit in end loop has electric current, and then, control device stops ringing
Should initial p WM signal, and control module output corresponding control signal under the action of, square-wave signal generation module according to
The corresponding output signal of Zero-cross comparator output module generates the square-wave signal with current in phase position, the driving signal generation module
Switching tube driving signal is generated according to the square-wave signal, is controlled with switch tube.
The square-wave signal generation module includes starting of oscillation unit and phase locked-loop unit, and the control module and Zero-cross comparator are defeated
Module output connects the corresponding input terminal of the starting of oscillation unit out, and the output end of the starting of oscillation unit connects the phaselocked loop list
The input terminal of member, the output end of the phase locked-loop unit is the output end of the square-wave signal generation module.
The starting of oscillation unit includes optocoupler U8 and four NAND gates, the anode connection power supply electricity of the primary side of the optocoupler U8
Source, the cathode of the primary side of the optocoupler U8 are grounded for inputting the control signal, power supply by the secondary side of optocoupler U8, light
Two input terminals of the anode output connection NAND gate U7B on coupling U8 pair side, an input terminal of NAND gate U7C connect the optocoupler
The anode on U8 pair side, another input terminal connect NAND gate for inputting the initial p WM signal, the output end of NAND gate U7B
An input terminal of U7A, another input terminal of NAND gate U7A connect the output end of the Zero-cross comparator output module, and non-
The output end of door U7A and the output end of NAND gate U7C are separately connected two input terminals of NAND gate U7D, the NAND gate U7D's
Output end is the output end of the starting of oscillation unit；
When emitting does not have electric current in end loop, the control signal of the cathode input of the primary side of the optocoupler U8 is high electricity
It is flat, output end output and the consistent signal of initial p WM signal of NAND gate U7D；When emitting has electric current in end loop, the light
The control signal of the cathode input of the primary side of coupling U8 is low level, and another input terminal of the NAND gate U7C inputs initial
Pwm signal forfeiture effect, the consistent signal of signal of the output end output and the output of Zero-cross comparator output module of NAND gate U7D.
Control device provided by the invention is exclusively used in radio energy transmission system, and under initial situation, transmitting end loop does not have
There is electric current, at this moment, control module exports initial p WM signal and corresponding control signal, and control device responds initial p WM letter
Number, to control the switching tube in bridge circuit, switching tube emits in end loop in conducting and just has electric current, then control device
Stop response initial p WM signal, also, Zero-cross comparator output module handles the electric current in circuit and exports corresponding
Signal, square-wave signal generation module is according in control module and the generation of the corresponding output signal of Zero-cross comparator output module and circuit
Current in phase position square-wave signal, driving signal generation module according to square-wave signal generate switching tube driving signal, with split
Pipe is closed to be controlled.So the control device can generate reliable driving signal and carry out driving switch pipe, guarantee radio energy
Transmission, moreover, carry out the conducting of trigger switch pipe first with initial pwm signal under the initial situation that transmitting terminal does not have electric current,
Make the electric current for having certain in circuit, then, corresponding driving signal is generated according to the electric current in circuit, so, in initial shape
The control device can still be controlled under state with switch tube, and reliability is higher, and make bridge circuit work in perceptual area, be subtracted
Small loss, improves efficiency.
Detailed description of the invention
Fig. 1-a is S/S topological structure schematic diagram；
Fig. 1-b is S/P topological structure schematic diagram；
Fig. 1-c is P/S topological structure schematic diagram；
Fig. 1-d is P/P topological structure schematic diagram；
Fig. 2 is direct current input+full-bridge inverting+series resonance topological structure schematic diagram；
Fig. 3 is control device overall structure block diagram；
Fig. 4 is to follow amplification circuit diagram；
Fig. 5 is Zero-cross comparator output circuit figure；
Fig. 6 is start-oscillation circuit figure；
Fig. 7 is phase-locked loop circuit figure；
Fig. 8 is switching tube A, D driving generative circuit figure；
Fig. 9 is switching tube B, C driving generative circuit figure；
Figure 10-a is driving accentuator figure corresponding with Fig. 8；
Figure 10-b is driving accentuator figure corresponding with Fig. 9；
Figure 11 is the waveform diagram at several key points.
Specific embodiment
As shown in Figure 1, control device provided by the invention is exclusively used in radio energy transmission system, for the bridge in Fig. 2
Switching tube in formula circuit is controlled.As shown in figure 3, the control device includes: the electricity for acquiring transmitting terminal loop current
Detection module is flowed, for exporting the control module of control signal and initial p WM signal, Zero-cross comparator output module, square-wave signal
Generation module and driving signal generation module, current detection module export link control module and Zero-cross comparator output module,
The corresponding input terminal of control module and Zero-cross comparator output module output connection square wave signal generator module, square-wave signal generate
The input terminal of the output end connection driving signal generation module of module；When emitting end loop does not have electric current, control module output
Initial p WM signal and corresponding control signal, control device, come control switch pipe, return transmitting terminal according to initial p WM signal
Lu Zhongyou electric current, then, control device stop response initial p WM signal, and in the corresponding control letter of control module output
Under the action of number, square-wave signal generation module generates and current in phase position according to the corresponding output signal of Zero-cross comparator output module
Square-wave signal, driving signal generation module according to square-wave signal generate switching tube driving signal, controlled with switch tube.
Based on the above basic technical scheme, following emphasis is to the specific structure of each module, function and control device
The course of work be described in detail.
Due to being wireless power transmission, so transmitting terminal is not electrically connected with receiving end, therefore receiving end is not sampled here
Voltage and current situation, the only electric current in sampling transmitting end loop, which is able to reflect out the voltage and current feelings of receiving end
Condition.
The radio energy transmission system includes main circuit and control device, the characteristic based on wireless power transmission, the main electricity
Road can also be known as magnetic coupling resonance circuit.Main circuit is used for the wireless transmission of electric energy, and circuit structure is not unique, this implementation
Example provides a kind of specific structure, as shown in Fig. 2, including the bridge circuit of transmitting terminal, control device is used for transmitting terminal bridge-type
Switching tube in circuit carries out drive control.Since transmitting terminal bridge circuit partly belongs to routine techniques, here just no longer to it
It is illustrated, also, due to receiving terminal circuit and the emphasis of non-present invention, just no longer illustrates here.Control is filled emphatically below
It sets and is illustrated.
It is provided with conventional current detection module, such as current Hall sensor in control device, is returned to acquire transmitting terminal
Electric current in road.
Control module in control device can be control chip, be also possible to the physical circuit for having identical function.It should
Control module sampling connection current detection module, also, there are two output end, an output end output control letters for the control module
Number PWMCHANGE, another output export initial p WM signal PWMIN.
In addition, current detection module also exports connection Zero-cross comparator output circuit, moreover, in current detection module and zero passage
Compare to be additionally provided between output circuit and follow amplifying circuit, the current signal that current detection module detects is by following and putting
After big, Zero-cross comparator output circuit is inputed to.
As shown in Figures 4 and 5, a kind of specific circuit structure is given, wherein Fig. 4 is the circuit diagram for following amplifying circuit,
Fig. 5 is the circuit diagram of Zero-cross comparator output circuit.
As shown in figure 4, the homophase input of the current signal Isense output connection chip U5A of current detection module detection
End, after with amiable amplification, by the output end of U5B through 2 feet of the chip U6 in resistance R18 connection figure 5.Chip U6 is to prolong
Very short quick comparator of slow time, delay time are less than 100ms, and the upper rising edge of a pulse time is less than 10ns, for example uses
The TL3016 of TI.In Zero-cross comparator output circuit, output is positive and negative corresponding with electric current later compared with 0 level for current signal
Square-wave signal, since the square-wave signal also needs to carry out subsequent processing, then being referred to as primary square-wave signal.
Square-wave signal generation module in control device includes start-oscillation circuit and phase-locked loop circuit, as shown in fig. 6, starting of oscillation is electric
Road includes optocoupler U8 and four NAND gates, the anode connection power supply of the primary side of optocoupler U8, the cathode use of the primary side of optocoupler U8
In input control signal PWMCHANGE, power supply is grounded by the secondary side of optocoupler U8, the anode output connection on optocoupler U8 pair side
Two input terminals of NAND gate U7B, the anode on the input terminal connection optocoupler U8 pair side of NAND gate U7C, another input terminal
Output end for inputting initial p WM signal PWMIN, NAND gate U7B connects an input terminal of NAND gate U7A, NAND gate U7A
Another input terminal connection Zero-cross comparator output circuit output end, the output of the output end of NAND gate U7A and NAND gate U7C
End is separately connected two input terminals of NAND gate U7D, and the output end of NAND gate U7D is the output end of starting of oscillation unit.
When wireless power transmission systems do not work, the control signal PWMCHANGE of control module output is high level, is not exported just
Beginning pwm signal, i.e. PWMIN are always low level.Therefore, then the cathode of the primary side of optocoupler U8 is high level, the secondary side of optocoupler U8
It being not turned on, 5,6 feet of NAND gate U7B are high level, and the 4th foot is low level, and then the 1st foot of U7A is low level, the 3rd
Foot is high level, and the 11st foot of U7D exports the 8th foot PWMIN signal deciding by U7C, since PWMIN is low level, so,
The 11st foot of U7D is low level, does not have driving signal in control circuit, the switching tube in main circuit is in an off state always.
When wireless power transmission systems work, and under initial situation, there is no electric current, control module in main circuit transmitting end loop
The control signal PWMCHANGE of output is high level, and exports initial p WM signal PWNIN, then the cathode of the primary side of optocoupler U8 is defeated
Enter high level, output end (the 11st foot) output and the consistent pwm signal of initial p WM signal of NAND gate U7D.When transmitting end loop
In when having electric current, the control signal PWMCHANGE of control module output is low level, the control of the cathode input of the primary side of optocoupler U8
Signal processed is low level, and the secondary side of optocoupler U8 is connected, and 5,6 feet of NAND gate U7B are low level, and the 4th foot is high level, in turn
The 1st foot of U7A is high level, and the 3rd foot exports the signal opposite with Zero-cross comparator output module；An input terminal of U7C is defeated
Entering low level, then the initial p WM signal PWNIN of another input terminal of U7C input is acted on regard to forfeiture, and U7C exports always high level,
The then consistent signal of signal of the output of the 11st foot and the output of Zero-cross comparator output module of U7D.
As shown in fig. 7, phase-locked loop circuit includes chip CD4046 and chip CD4040, the 11st foot connection of NAND gate U7D
14 feet of chip CD4046,10 feet of the 4 feet output connection chip CD4040 of chip CD4046,7 feet of chip CD4040 are should
The output end of phase-locked loop circuit, the signal of output are COMPIN.Wherein, chip CD4046 is that general CMOS phaselocked loop integrates core
Piece, its main feature is that supply voltage range is wide (for 3V-18V), input impedance height (about 100M Ω), dynamic power consumption is small, uses herein
To realize frequency-tracking function；Chip CD4040 is 12 binary system serial counters, is constituted here using CD4040 counter
Frequency divider, to realize the function of frequency dividing.
The output highest frequency of the adjustable CD4046 of C1, R2, R3 in CD4046 peripheral circuit is adjusted, it here will output
Highest frequency is adjusted to switch 4 times or more of highest frequency, and CD4040 is frequency dividing circuit, after 4 frequency dividings, by the of CD4040
The 7 feet output signal COMPIN close with input frequency.Also, the COMPIN signal also inputs the 3rd of CD4046 the through resistance R7
Foot, CD4046 can adjust automatically its output frequency, COMPIN signal is adjusted to the signal phase inputted with 14 feet of CD4046
The pwm signal that position is consistent, duty ratio is 50%.COMPIN signal is the pwm signal after locking phase.
The pwm signal that signal COMPIN after locking phase is inputted with phase-locked loop circuit is in phase, and needs exist for generating phase
The driving signal of 10-20 degree after steric retardation, therefore CD4098 trigger is used in subsequent drive signal generating unit point.
Fig. 8 and Fig. 9 is two driving generative circuits being made of CD4098.One for generating the driving of switching tube A, D
Signal, another is used to generate the driving signal of switching tube B, C, and the structure of the two driving generative circuits is identical.For any
One circuit, as shown in figure 8, including two sequentially connected CD4098 chips.Switching tube A, D use same driving, phaselocked loop
The COMPIN signal of circuit output is triggered, capacitor C6 and resistance from the TR- input of first trigger CD4098 using failing edge
The time of R7 setting driving delay, the 11 of second trigger CD4098 of the 6th foot output connection of first trigger CD4098
Foot, second trigger CD4098 carries out delay disposal, R8 and C8 setting driving width to signal again, finally defeated by 10 feet
Out, the driving signal of output be after phase delay duty ratio less than 50% (consider dead drive the time) driving signal.Similarly, scheme
9 be the driving generative circuit of switching tube B, C, and the TR+ input of COMPIN signal slave flipflop is triggered using rising edge, by two
Output phase delay, the simultaneously driving signal with the driving signal of A, D with certain dead zone, are as opened after the processing of a CD4098
Close the driving signal of pipe B, C.Wherein, chip CD4098 is two-way monostable flipflop, is cascaded here using two-way CD4098, structure
At pulse signal delay circuit, to realize the delay of driving signal.
In addition, in order to enhance driving capability, setting as shown in Figure 10-a and 10-b, is switched there are two accentuator is driven
Output drive signal DRIAD after pipe A, D drive the driving signal DRIAD0 of generative circuit output to reinforce by driving accentuator,
It opens and turns off with driving switch pipe A, D.Similarly, switching tube B, C drives the driving signal DRIBC0 of generative circuit output to pass through
Output drive signal DRIBC after driving accentuator to reinforce, is opened and is turned off with driving switch pipe B, C.
When wireless power transmission systems work, and under initial situation, there is no electric current, initial p WM in main circuit transmitting end loop
Signal plays the role of driving switch pipe, and switching tube realizes on-off, and making to emit in end loop has electric current.Have in transmitting end loop
While electric current or when electric current reaches certain value, corresponding driving signal, detailed process are generated by electric current are as follows:
The current signal that current detection module will test is sent to control module, while being sent to Fig. 4 and following in amplifying circuit
Current signal, is sent to the Zero-cross comparator output circuit of Fig. 5 by (Isense signal), following with after amplification through high speed amplifier
In, current signal is converted to one group of square wave, and part above freezing is positive, and subzero part is 0, that is, it is positive and negative right with detection electric current to export
The square wave answered, the square wave enter 2 feet of the U7A in Fig. 6 start-oscillation circuit.
After control module receives electric current, the control signal PWMCHANGE signal of output is low level, and 11 feet of U7D are defeated
The square-wave signal that signal is exported with Zero-cross comparator output circuit out is consistent, and signal is exported to the phase-locked loop circuit of Fig. 7
Middle carry out locking phase, by exporting a phase and the consistent side of input signal after the locking phase of chip CD4046 and the frequency dividing of CD4040
Wave signal.
Party's wave is respectively fed to handle in two driving generative circuits, exports two-way driving signal, driving letter
The electrical angle of number lagging current signal 10-20, and dead zone is had, two groups of diagonal bridge arms for controlling transmitting terminal bridge circuit respectively are opened
Opening and turning off for pipe is closed, the bridge circuit is made to always work in perceptual area, to realize the Sofe Switch starting of switching tube, is subtracted
Small loss, improves efficiency.
When the load in main circuit changes, that is, the impedance loaded is changed, at this moment equivalent to arrive transmitting terminal, phase
When the impedance in transmitting end loop is changed, this influences whether the resonant parameter of transmitting terminal, so, the variation energy of load
So that transmitting terminal resonance frequency is changed, needs control device just when resonance frequency variation to adjust the output of driving, make
Transmitting end loop always works at weak perceptual section, and switching tube would operate in Sofe Switch state at this time.In addition, transmitting end loop electricity
Flowing can change with the voltage-phase of switching tube, and after current phase changes, which can always lock voltage-phase
In the state of one electrical angle of lagging current.
Figure 11 be the control device at work, wherein the waveform at several key points.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, it is not limited to the specific structure of each section provided in above-described embodiment, to this field
For those of ordinary skill, introduction according to the present invention, the model, formula, parameter for designing various modifications does not need to spend
Creative work.Without departing from the principles and spirit of the present invention to embodiment carry out variation, modification, replacement and
Modification is still fallen in protection scope of the present invention.
Claims (10)
1. a kind of control device based on radio energy transmission system, which is characterized in that
It include: the current detection module for acquiring transmitting terminal loop current, for exporting control signal and initial p WM signal
Control module, Zero-cross comparator output module, square-wave signal generation module and driving signal generation module, the current detecting
Module output connects the control module and the Zero-cross comparator output module, the control module and Zero-cross comparator output module
Output connects the corresponding input terminal of the square-wave signal generation module, and the output end of the square-wave signal generation module connects institute
State the input terminal of driving signal generation module；
When emitting end loop does not have electric current, control module exports initial p WM signal and corresponding control signal, the control dress
It sets according to initial p WM signal come control switch pipe, making to emit in end loop has electric current, and then, control device stops response should
Initial p WM signal, and under the action of the corresponding control signal of control module output, square-wave signal generation module is according to zero passage
Compare output module corresponding output signal generate with the square-wave signal of current in phase position, the driving signal generation module according to
The square-wave signal generates switching tube driving signal, is controlled with switch tube.
2. the control device according to claim 1 based on radio energy transmission system, which is characterized in that
The square-wave signal generation module includes starting of oscillation unit and phase locked-loop unit, and the control module and Zero-cross comparator export mould
Block output connects the corresponding input terminal of the starting of oscillation unit, and the output end of the starting of oscillation unit connects the phase locked-loop unit
Input terminal, the output end of the phase locked-loop unit are the output end of the square-wave signal generation module.
3. the control device according to claim 2 based on radio energy transmission system, which is characterized in that
The starting of oscillation unit includes optocoupler U8 and four NAND gates, the anode connection power supply of the primary side of the optocoupler U8, institute
The cathode for stating the primary side of optocoupler U8 is grounded for inputting the control signal, power supply by the secondary side of optocoupler U8, optocoupler U8
Two input terminals of the anode output connection NAND gate U7B on secondary side, an input terminal of NAND gate U7C connect the optocoupler U8 pair
The anode on side, another input terminal connect NAND gate U7A's for inputting the initial p WM signal, the output end of NAND gate U7B
One input terminal, another input terminal of NAND gate U7A connect the output end of the Zero-cross comparator output module, NAND gate U7A
Output end and the output end of NAND gate U7C be separately connected two input terminals of NAND gate U7D, the output of the NAND gate U7D
End is the output end of the starting of oscillation unit；
When emitting does not have electric current in end loop, the control signal of the cathode input of the primary side of the optocoupler U8 is high level, with
Output end output and the consistent signal of initial p WM signal of NOT gate U7D；When emitting has electric current in end loop, the optocoupler U8
Primary side cathode input control signal be low level, the NAND gate U7C another input terminal input initial p WM letter
Mistake of howling at a funeral effect, the consistent signal of signal of the output end output and the output of Zero-cross comparator output module of NAND gate U7D.
4. the control device according to claim 2 based on radio energy transmission system, which is characterized in that
The phase locked-loop unit includes chip CD4046 and chip CD4040, and the output end of the starting of oscillation unit connects the chip
14 feet of CD4046,10 feet of the 4 feet output connection chip CD4040 of chip CD4046,7 feet of chip CD4040 are the locking phase
The output end of ring element, 3 feet of the 7 feet connection chip CD4046 of chip CD4040；The chip CD4046 is integrated for phaselocked loop
Chip, the chip CD4040 are 12 binary system serial counters.
5. the control device according to claim 1 based on radio energy transmission system, which is characterized in that
The driving signal generation module includes the first driving for generating the driving signal of driving switch pipe A and switching tube D
Second driving unit of unit and the driving signal for generating driving switch pipe B and C.
6. the control device according to claim 5 based on radio energy transmission system, which is characterized in that
The structure of first driving unit and the second driving unit is identical, and first driving unit includes two and is sequentially connected
CD4098 chip, the output end of phase locked-loop unit connects the input terminal of the first CD4098 chip, the 2nd CD4098 chip it is defeated
Outlet output is used for the driving signal of driving switch pipe A and switching tube D；Wherein, CD4098 chip is two-way monostable flipflop.
7. the control device according to claim 1 based on radio energy transmission system, which is characterized in that
The control device further includes tracking amplification module, and the current detection module is connected by tracking amplification module output
Connect the Zero-cross comparator output module.
8. a kind of radio energy transmission system, including main circuit and control device, the main circuit includes the bridge-type electricity of transmitting terminal
Road, the control device control the switching tube on bridge circuit, which is characterized in that
The control device includes: the current detection module for acquiring transmitting terminal loop current, for export control signal and
The control module of initial p WM signal, Zero-cross comparator output module, square-wave signal generation module and driving signal generation module,
The current detection module output connects the control module and the Zero-cross comparator output module, the control module and zero passage
Compare the corresponding input terminal that output module output connects the square-wave signal generation module, the square-wave signal generation module
Output end connects the input terminal of the driving signal generation module；
When emitting end loop does not have electric current, control module exports initial p WM signal and corresponding control signal, the control dress
It sets according to initial p WM signal come control switch pipe, making to emit in end loop has electric current, and then, control device stops response should
Initial p WM signal, and under the action of the corresponding control signal of control module output, square-wave signal generation module is according to zero passage
Compare output module corresponding output signal generate with the square-wave signal of current in phase position, the driving signal generation module according to
The square-wave signal generates switching tube driving signal, is controlled with switch tube.
9. radio energy transmission system according to claim 8, which is characterized in that
The square-wave signal generation module includes starting of oscillation unit and phase locked-loop unit, and the control module and Zero-cross comparator export mould
Block output connects the corresponding input terminal of the starting of oscillation unit, and the output end of the starting of oscillation unit connects the phase locked-loop unit
Input terminal, the output end of the phase locked-loop unit are the output end of the square-wave signal generation module.
10. radio energy transmission system according to claim 9, which is characterized in that
The starting of oscillation unit includes optocoupler U8 and four NAND gates, the anode connection power supply of the primary side of the optocoupler U8, institute
The cathode for stating the primary side of optocoupler U8 is grounded for inputting the control signal, power supply by the secondary side of optocoupler U8, optocoupler U8
Two input terminals of the anode output connection NAND gate U7B on secondary side, an input terminal of NAND gate U7C connect the optocoupler U8 pair
The anode on side, another input terminal connect NAND gate U7A's for inputting the initial p WM signal, the output end of NAND gate U7B
One input terminal, another input terminal of NAND gate U7A connect the output end of the Zero-cross comparator output module, NAND gate U7A
Output end and the output end of NAND gate U7C be separately connected two input terminals of NAND gate U7D, the output of the NAND gate U7D
End is the output end of the starting of oscillation unit；
When emitting does not have electric current in end loop, the control signal of the cathode input of the primary side of the optocoupler U8 is high level, with
Output end output and the consistent signal of initial p WM signal of NOT gate U7D；When emitting has electric current in end loop, the optocoupler U8
Primary side cathode input control signal be low level, the NAND gate U7C another input terminal input initial p WM letter
Mistake of howling at a funeral effect, the consistent signal of signal of the output end output and the output of Zero-cross comparator output module of NAND gate U7D.
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| CN107656133B (en) * | 2017-09-15 | 2020-12-11 | 许继电源有限公司 | Method and device for detecting resonant current of transmitting end of wireless charging system |
| CN109728633B (en) * | 2019-01-17 | 2021-02-26 | 中国科学院电工研究所 | Direct resonant frequency phase tracking control method of non-contact power supply device |
| CN114787885A (en) * | 2020-01-07 | 2022-07-22 | Oppo广东移动通信有限公司 | Control circuit and control method of switching tube |
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