CN104638774B - Magnetic-coupling resonant wireless power transmission system and method - Google Patents
Magnetic-coupling resonant wireless power transmission system and method Download PDFInfo
- Publication number
- CN104638774B CN104638774B CN201410398980.5A CN201410398980A CN104638774B CN 104638774 B CN104638774 B CN 104638774B CN 201410398980 A CN201410398980 A CN 201410398980A CN 104638774 B CN104638774 B CN 104638774B
- Authority
- CN
- China
- Prior art keywords
- resonant network
- receiving terminal
- resonance
- current
- transmitting terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000010168 coupling process Methods 0.000 title claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 12
- 230000010355 oscillation Effects 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 230000001965 increasing effect Effects 0.000 claims description 34
- 238000001514 detection method Methods 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 22
- 230000007423 decrease Effects 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 8
- 230000003534 oscillatory effect Effects 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000013528 artificial neural network Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 230000009514 concussion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H02J7/025—
-
- H02J5/005—
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a magnetic-coupling resonant wireless power transmission system and method. The system comprises a transmitting device and a receiving device. The transmitting device comprises a transmitting terminal LC (inductor-capacitor) resonant network, a power supply and a self-resonant control circuit; the power supply charges the transmitting terminal LC resonant network; after the self-resonant control circuit is charged, the power supply is disconnected; the transmitting terminal LC resonant network automatically resonates and oscillates under inherent self-frequency; a resonant coil in the transmitting terminal LC resonant network transmits energy out in a form of electromagnetic wave; the receiving device comprises a receiving terminal LC resonant network and an adaptive regulating circuit; a resonant coil in the receiving terminal LC resonant network senses the electromagnetic wave and generates resonant oscillation; the adaptive regulating circuit allows the receiving terminal LC resonant network and the transmitting terminal LC resonant network to generate magnetic-coupling resonance by regulating the inherent frequency of the receiving terminal LC resonant network. The problems such that in the traditional wireless power transmission scheme, high-frequency control is difficult and adaptability is poor are solved.
Description
Technical field
The present invention relates to wireless power transmission technology, particularly relate to a kind of magnet coupled resonant type wireless electric energy transmission system and
Method.
Background technology
In greatly developing intelligent power grid technology, the equipment being arranged on transmission tower does not have working power for China, tradition
Method be to provide equipment working power, the later maintenance of this power supply mode using the combination of solar energy pole plate and battery
Relatively costly.And ultra-high-tension power transmission line sensing power taking technology is equipotential power taking, can provide to work equipment on the line
Working power.But the equipment being operated on shaft tower does not still have working power, if electric energy is transferred to by shaft tower by wire, etc.
With by the high potential of transmission line of electricity and ground potential short circuit, can not implement.
Wireless power transmission (wireless power transmission, wpt), that is, wireless power transmission is by mean of electromagnetism
Or electromagnetic wave carry out a kind of new technique of energy transmission.With scientific and technological development, traditional power transmission mode is difficult to meet it
Power demands.Therefore, the importance of development wireless power transmission technology increasingly highlights.
Existing wireless power transmission is broadly divided into: induction, electromagnetic radiation formula and electromagentic resonance formula.Induction
Transmission range is near, efficiency is low.Energy transmission between generator, the rotor of motor is exactly to utilize this principle, transmission range
For grade.Electromagnetic radiation formula long transmission distance, but if being isotropic directivity radiation, the efficiency of transmission electric energy can be very low；And
If directed radiation, to have and pay no attention to disconnected visual orientation and sufficiently complex tracking instrument and equipment, it is very big that it develops difficulty.
Electromagentic resonance formula, mainly utilizes magnet coupled resonant type delivery of energy technology, is the breakthrough to induction type, in theory can be in several meters of model
Enclose interior high efficiency energy of realizing to transmit, once the power mode technically making a breakthrough will change people, it has a extensive future.
Magnet coupled resonant type delivery of energy technical thought is proposed in 2006 by the Massachusetts Institute of Technology (mit) earliest, and in 2007
Year has obtained preliminary experimental verification, and experimental result has been published in " science " magazine.Magnetic field is relied on to pass on this technological essence
Pass energy, it passes through the coupling in magnetic field between resonance coil, the wireless of energy is realized in the resonance producing by transmitting and receiving coil
Transmission.Technique can have simultaneously and pass through non-magnetic obstacle in the energy of meter level Distance Transmission relatively high power in theory
Thing, to relative position require more low outstanding advantages.
The basic implementation of this technology mainly arranges delivery of energy power supply, drive circuit and radiating circuit in transmitting terminal；?
Receiving terminal arranges receiving circuit and mu balanced circuit etc..Wherein radiating circuit is usually to be vibrated by the lc that transmitting coil and electric capacity form
Loop, the lc oscillation circuit that receiving circuit is made up of receiving coil and electric capacity.There is provided to transmitting coil by delivery of energy power supply and continue
Energy output, by drive circuit produce drive signal excitation transmitting coil resonance, produce alternating magnetic field.Action of alternating magnetic field in
Receiving coil, makes receiving coil produce resonance, and because receiving coil is identical with transmitting coil frequency, therefore the two produces resonance,
Thus the energy of delivery of energy power supply is transferred to receiving coil.
Shown in Figure 1, it is a kind of structure of exemplary implementation of the prior art.Including dc source, on-off circuit,
Radiating circuit, booster, five parts of resonance receiving circuit.Wherein, dc source, on-off circuit are connected with radiating circuit even
Connect, by on-off circuit, as the drive circuit producing drive signal, controlling switch pipe t turns on and off, thus being swashed
Encourage the high frequency square wave voltage of radiating circuit resonance, make the lc loop of radiating circuit produce the higher-order of oscillation；The lc loop of receiving circuit
Produce simultaneous resonance, receive the energy of radiating circuit transmitting.
At present the Research Challenges of this technology are: can answer so as to reach to improve efficiency of transmission and transmission range
With rank, all frequency of oscillation of an urgent demand raising radiating circuit.But so on the one hand require the lc improving radiating circuit to return
Road frequency of oscillation, also requires that drive circuit produces matching high-frequency driving signal simultaneously, and requires at high frequencies should
Drive signal keeps Complete Synchronization with the lc oscillation circuit frequency in radiating circuit.General way is accurately to measure radiating circuit
Natural mode shape after, then the occurrence frequency of drive signal is set, and also needs to when equipment works adjust this driving letter
Number frequency is synchronous with lc recirculating loop frequency.But the raising with transmitting coil frequency of oscillation, the controlling switch pipe t device of itself is determined
Fixed switching frequency and opportunity are difficult to adjust, therefore, it is difficult to realizing being precisely controlled it is impossible to make coil all vibrate at any time in resonance frequency
In rate.
The frequency of oscillation of the switching frequency of controlling switch pipe t also radiating circuit to be reached, to the loss of controlling switch also very
Greatly.
Therefore no matter to transmitting coil also the resonant frequency of receiving circuit also must be consistent with the tranmitting frequency of radiating circuit,
Be receiving coil processing technology require all higher.
And the change with external environment conditions such as temperature, humidity, discrete inductance parameter also changing therewith, and by
Complicated in radio energy-transmitting device discrete parameter, coil is easily disturbed by peripheral circuit, causes frequency to drift about.And prior art is driven
The frequency of dynamic signal but can not adaptively change therewith, thus reliability and the effect of wireless energy transfer will be had a strong impact on
Rate.Thus in engineering, particularly high voltage power transmission field practical application and popularization causes very big obstacle to wireless power transmission technology.
All the time neither one scheme can solve this problem well at present.
Content of the invention
In view of this, it is an object of the invention to proposing a kind of system of magnet coupled resonant type wireless electric energy transmission and side
Method, passes and can control difficult, the difficult problem such as adaptivity difference by scheme high frequency to solve conventional wireless.
Based on the above-mentioned purpose present invention provide magnet coupled resonant type wireless electric energy transmission system, comprising: transmitting equipment and
Receiving device；
Transmitting terminal lc resonant network, energising power and self-resonance control circuit is included in transmitting equipment；Energy supply electricity
Charge to transmitting terminal lc resonant network in source, self-resonance control circuit, after charging finishes, disconnects the power supply of energising power；Transmitting terminal
The self-resonance vibration under itself intrinsic frequency of lc resonant network, and by the resonance coil in this transmitting terminal lc resonant network by energy
Amount transfers out in the form of an electromagnetic wave；
Receiving terminal lc resonant network and Automatic adjusument circuit is included in receiving device；Receiving terminal lc resonant network
Resonance coil sense described electromagnetic wave produce resonance oscillations；It is humorous that described Automatic adjusument circuit passes through regulation this receiving terminal lc
The intrinsic frequency of vibrating network, makes this receiving terminal lc resonant network and the lc resonant network of described transmitting terminal produce magnetic coupling resonance.
Optionally, in transmitting terminal lc resonant network self-resonance oscillatory process under itself intrinsic frequency described in this system, from
When resonant control circuit detects in transmitting terminal lc resonant network energy and is less than predetermined threshold, closure energising power starts to described
Transmitting terminal lc resonant network charges.
Optionally, in transmitting equipment described in this system, energising power is the dc source of constant voltage, and self-resonance controls electricity
Road includes: transmitting terminal current sensing means, emission control module, emission switch module；
Described dc source, emission switch module and transmitting terminal lc resonant network are connected in series；Described transmitting terminal electric current inspection
Survey device for detecting the electric current on transmitting terminal lc resonant network and the current value detecting being transferred to emission control module；Institute
State emission control module to be used for controlling emission switch module to be opened or closed；
After emission switch module closure, dc source starts to charge to described transmitting terminal lc resonant network, when transmitting terminal electricity
Flow detection device detects current value when being higher than predetermined current maxima, and emission control module controls emission switch module to break
Open, enable transmitting terminal lc resonant network to start self-oscillation and to unofficial biography；Described in detecting when described transmitting terminal current sensing means
When current value on transmitting terminal lc resonant network is less than predetermined current minimum, emission control module controls emission switch module
Closure.
Optionally, when described transmitting terminal current sensing means detects on described transmitting terminal lc resonant network described in this system
Current value when being less than predetermined current minimum, also detection electric current whether zero crossing, when current zero-crossing point, emission control mould
Block controls emission switch module closure.
Optionally, dc source described in this system is induction type electricity getting device, obtains for sensing on high voltage transmission line
Energy rectifying and wave-filtering formation galvanic current potential source.
Optionally, in receiving device, described Automatic adjusument circuit includes this system: energy testing apparatus, feedback control
Circuit processed, self-adapting resonance adjusting means；Energy acquisition output circuit is also included in receiving device；
Receiving terminal lc resonant network receives the next electromagnetic wave of transmitting device transmission and produces resonance oscillations, energy testing apparatus
Detect the electric current on this receiving terminal lc resonant network and export current value to feedback control circuit, feedback control circuit is according to electricity
The change of flow valuve sends control signal to self-adapting resonance adjusting means, and self-adapting resonance adjusting means adjusts described receiving terminal lc
The intrinsic frequency of resonant network, so that the current value on lc resonant network maximizes；
Energy acquisition output circuit exports after processing the current acquisition in described lc resonant network.
Optionally, energy testing apparatus described in this system include: punching current transformer and rectifying and voltage-stabilizing module；Described anti-
Feedback control circuit is mcu；Described self-adapting resonance adjusting means include motor drive module, motor and with receiving terminal lc resonance
Resistance to voltage capacitance in network tunable capacitor in parallel；
Electric current in punching current transformer sensing receiving terminal lc resonant network, induced-current is exported to rectifying and voltage-stabilizing mould
Block, inputs to the ad module in mcu after rectifying and voltage-stabilizing；Mcu, according to the change of current value before and after adjusting, sends Regulate signal to electricity
Machine drive module；Motor drive module controlled motor adjusts the capacitance of described tunable capacitor.
Optionally, described in this system, energy acquisition output circuit includes: matching network, rectifying and voltage-stabilizing module, charge control
Circuit, battery；
The output end of receiving terminal lc resonant network connects to described matching network, and matching network is used for making receiving terminal lc resonance
Network internal resistance is mated with receiving terminal equivalent load impedance, and the electric current on lc resonant network is exported to rectifying and voltage-stabilizing module；Warp
Electric current after rectifying and voltage-stabilizing is processed exports respectively to battery and load, and described battery powers to the load simultaneously；
Described charging control circuit detects battery both end voltage, when magnitude of voltage is less than predetermined threshold, charge control electricity
Road is opened and is charged to battery, and continues to detect battery both end voltage；When magnitude of voltage reaches the full piezoelectric voltage value of battery, fill
Electric control circuit stops charging to battery.
Optionally, distinguish between rectifying and voltage-stabilizing module described in this system and load and between charging control circuit and load
It is connected with the diode for anti-backflow.
Optionally, self-adapting resonance adjusting means described in this system adjusts the intrinsic frequency of described receiving terminal lc resonant network
Process include:
After power-up initializing, detect the current value on receiving terminal lc resonant network, determine whether zero, if so, then return
Continue detection；If not zero capacitance adjusting on receiving terminal lc resonant network increaseds or decreases a δ c；
Whether judge the current value after capacitance adjustment more than the current value before adjusting, if then continue equidirectional increasing adding deduct
A little δ c, otherwise opposite direction increased or decrease a δ c；
The trend increasing along electric current continues to increased or decrease a δ c, reverses until electric current increase tendency is detected；Then right
After capacitance present value adjusts back a δ c, lock this capacitance, and record this current maximum current value；
Continue detection receiving terminal lc resonant network current value, if present current value be less than record maximum current value and
Exceed given threshold, then return the current value on detection receiving terminal lc resonant network, determine whether zero initial step.
Optionally, in this system present invention, due to resonance coil and the receiving terminal lc Resonance Neural Network of transmitting terminal lc resonant network
, at 2～5 meters, the angle of receiving coil axis relative transmission coil axis is within ± 30 ° for the distance between resonance coil of network；
Or the axis of both resonance coils of the resonance coil of transmitting terminal lc resonant network and receiving terminal lc resonant network
Parallel but 2 times of the resonance coil diameter that distance is without departing from transmitting terminal lc resonant network that is staggered.
In another aspect of this invention, additionally provide a kind of magnet coupled resonant type wireless method of electric energy transfer, comprising:
In transmitting equipment, energising power charges to transmitting terminal lc resonant network, and after charging finishes, energising power stops
Power supply；
The self-resonance vibration under itself intrinsic frequency of transmitting terminal lc resonant network, and by this transmitting terminal lc resonant network
Resonance coil energy is transferred out in the form of an electromagnetic wave；
In receiving device, the resonance coil of receiving terminal lc resonant network senses described electromagnetic wave and produces resonance oscillations；
Adjust the intrinsic frequency of this receiving terminal lc resonant network, make the lc of this receiving terminal lc resonant network and described transmitting terminal
Resonant network produces magnetic coupling resonance.
Optionally, the method further includes: described transmitting terminal lc resonant network self-resonance under itself intrinsic frequency is shaken
During swinging, energy in detection transmitting terminal lc resonant network, when this energy is less than predetermined threshold, energising power starts to described
Transmitting terminal lc resonant network charges.
Optionally, the method presets current maxima and the current minimum of transmitting terminal lc resonant network；
Described energising power to transmitting terminal lc resonant network charge when, detect the current value of this transmitting terminal lc resonant network,
When current value is higher than described current maxima, energising power is stopped power supply；
In transmitting terminal lc resonant network self-resonance oscillatory process under itself intrinsic frequency, detect this transmitting terminal lc resonance
The current value of network, when current value is less than described current minimum, energising power starts to described transmitting terminal lc resonant network
Charge.
Optionally, the method receiving terminal lc resonant network receives the next electromagnetic wave of transmitting device transmission and produces resonance oscillations
Afterwards, progressively adjust the intrinsic frequency of described receiving terminal lc resonant network, during adjusting, detect this receiving terminal lc resonant network
On electric current, until lc resonant network on current value maximize.
Optionally, the method adjusts described intrinsic frequency by adjusting the capacitance on receiving terminal lc resonant network.
Optionally, the process adjusting the intrinsic frequency of receiving terminal lc resonant network described in the method includes:
After power-up initializing, detect the current value on receiving terminal lc resonant network, determine whether zero, if so, then return
Continue detection；If not zero capacitance adjusting on receiving terminal lc resonant network increaseds or decreases a δ c；
Whether judge the current value after capacitance adjustment more than the current value before adjusting, if then continue equidirectional increasing adding deduct
A little δ c, otherwise opposite direction increased or decrease a δ c；
The trend increasing along electric current continues to increased or decrease a δ c, reverses until electric current increase tendency is detected；Then right
After capacitance present value adjusts back a δ c, lock this capacitance, and record this current maximum current value；
Continue detection receiving terminal lc resonant network current value, if present current value be less than record maximum current value and
Exceed given threshold, then return the current value on detection receiving terminal lc resonant network, determine whether zero initial step.
From the above it can be seen that the system and method that the magnet coupled resonant type wireless electric energy that the present invention provides transmits,
Not control the vibration of radiating circuit using outside drive signal, but to breach original thoughtcast, using transmitting
In circuit, lc loop intrinsic frequency realizes energy transmission.No longer it is concerned about whether the frequency of drive signal can keep and radiating circuit
Frequency consistent and synchronous, and whether the energy only focusing in radiating circuit reaches transmission requirement.Pass through self adaptation in receiving terminal
Mode, make receiving circuit frequency always consistent with the frequency of radiating circuit.Thus achieving energy transmission well, have
Effect improves efficiency of transmission.The solution of the present invention is made to have the advantage that
1st, equipment dependability and adaptivity are effectively lifted, and the circuit topological structure of transmitting terminal is simple to be driven it is not necessary to produce
The drive circuit of dynamic signal, it is to avoid for realizing the driving signal frequency complex control consistent and synchronous with radiating circuit frequency.
Further, since control process is simple, frequency self adaptation is all built with basic circuit, and logic is simple, does not have software programming, improves
Reliability and reaction speed, the self-control under achievable high-frequency, there is stronger adaptive ability.Particularly when using in height
During pressure transmission line power taking, because transmitting equipment closes on high voltage transmission line, its electromagnetic radiation is very strong, easily transmitting equipment is caused
Interference, produces frequency drift, or even damages the control chip in transmitting equipment, transmitting terminal of the present invention because topological structure is simple and
Chip can not be needed to realize controlling, therefore, it is possible to effective lifting means reliability.
2nd, efficiency of transmission significantly improves, and the present invention directly constitutes frequency-selective network using radiating circuit, makes system shake frequency
Concussion, in the resonant frequency of radiating circuit, solves radiating circuit medium frequency matching problem forever.And by electric to receiving
Automatic adjusument mode is taken on road, so that receiving circuit is also operated in resonant frequency, even if the factor such as external environment condition causes to launch
Frequency changes, and receiving terminal also can realize frequency coupling well, makes transmitting terminal and receiving terminal remain synchronous, produces resonance
Effect, thus efficiency of transmission significantly improves.Additionally, transmitting terminal is due to need not be driven the limit of signal control circuit in the present invention
System, the frequency of oscillation of transmission signal can be greatly improved, and high-frequency can be prevented effectively from energy dissipation in electron waves transmitting procedure,
The efficiency of radio energy-transmitting can be effectively improved and pass energy distance.Generally, the present invention does not need booster, you can realize no
Effective transmission of heat input.
3rd, the security of equipment, practicality are high, substantially reduce cost.Compared with traditional Multi- Switch DC inversion circuit control
System, because batch (-type) of the present invention passes energy, in the present invention, the switching frequency of transmitting terminal significantly reduces, and switching frequency is much low
In frequency of oscillation, effectively prevent some the row difficult problems causing because switching frequency is too high, such as driving chip difficulty is looked for, and seldom has million
The mos driving chip of hertz rank；There is high requirement to mos pipe rising edge and trailing edge time delay, if resonant frequency is 1m hertz
Hereby, the rise and fall of switch along when to control within 50ns；Switch the economize on electricity of itself under high frequency situations to hold, mutual between wire
Sense cannot be ignored, and actual fabrication difficulty is very big etc..Further, since the present invention program to radiating circuit and receiving circuit from
Body frequency, all less than very high required precision, makes transmitting coil and the processing technology of receiving coil become simple, greatly reduces
Production cost.
, through Practical on-site test, reliability, energy transfer efficiency and biography can be apart from all obvious for the wireless power transmission systems of the present invention
Higher than prior art, make this technology departing from laboratory stage, reach the level of practical application.Using radio energy of the present invention
Transmission system, can convert electrical energy into electromagnetic transmission energy, and centre, by air insulation, can be prevented effectively from short circuit problem.
The fields such as energy, wireless charging are taken to be with a wide range of applications in high voltage transmission line.
Brief description
Fig. 1 is prior art magnet coupled resonant type delivery of energy radio energy transmission system structural representation；
Fig. 2 is the structural representation of embodiment of the present invention magnet coupled resonant type wireless electric energy transmission system；
Fig. 3 is the structured flowchart of embodiment of the present invention magnet coupled resonant type wireless electric energy transmitting equipment；
Fig. 4 launches the structural representation of one specific embodiment of equipment for the present invention；
Fig. 5 is the structured flowchart that embodiment of the present invention magnet coupled resonant type wireless electric energy transmits receiving device；
Fig. 6 is the structural representation of one specific embodiment of receiving device of the present invention；
Fig. 7 is the Adaptive matching control flow chart of embodiment of the present invention receiving device；
Fig. 8 is application schematic diagram on high voltage transmission line for the embodiment of the present invention radio energy transmission system.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
Batch (-type) radio energy transmission system shown in Figure 2, providing in the embodiment of the present invention, mainly by transmitting equipment
With receiving device composition.
Transmitting terminal lc resonant network, energising power and self-resonance control circuit is included in transmitting equipment；Energy supply electricity
Charge to the lc resonant network of transmitting terminal in source, self-resonance control circuit, after charging finishes, disconnects the power supply of energising power；Transmitting
The self-resonance vibration under itself intrinsic frequency of end lc resonant network, and will by the resonance coil in this transmitting terminal lc resonant network
Energy transfers out in the form of an electromagnetic wave；
Receiving terminal lc resonant network and Automatic adjusument circuit is included in receiving device；Receiving terminal lc resonant network
Resonance coil senses described electromagnetic wave and produces resonance oscillations；Described Automatic adjusument circuit passes through to adjust this receiving terminal lc resonance
The intrinsic frequency of network, makes this receiving terminal lc resonant network and the lc resonant network of described transmitting terminal produce resonance.
Additionally, in described transmitting terminal lc resonant network self-resonance oscillatory process under itself intrinsic frequency, self-resonance controls
Electric circuit inspection in transmitting terminal lc resonant network energy be less than predetermined threshold when, closure energising power start to described transmitting terminal lc
Resonant network charges.
The structure that the radio energy that the present invention provides launches one embodiment of equipment is shown in Figure 3, comprising: dc source
401st, the transmitting terminal lc resonant network 402 that composed in parallel by transmitting coil and electric capacity, transmitting terminal current sensing means 303, transmitting
Control module 302, emission switch module 408；
Described dc source 401, emission switch module 408 and transmitting terminal lc resonant network 402 are connected in series；Described transmitting
End current sensing means 303 is for detecting the electric current on transmitting terminal lc resonant network 402 and being transferred to the current value detecting
Emission control module 302；Described emission control module 302 is used for controlling emission switch module to be opened or closed；
After emission switch module 408 closure, dc source 401 starts to charge to described transmitting terminal lc resonant network 402, when
Transmitting terminal current sensing means 303 detects current value when being higher than predetermined current maxima, and emission control module 302 controls to be sent out
Penetrate switch module 408 to disconnect, enable transmitting terminal lc resonant network 402 to start self-oscillation and to unofficial biography；When described transmitting terminal electric current
When the current value that detection means 303 detects on described transmitting terminal lc resonant network 402 is less than predetermined current minimum, transmitting
Control module 302 controls emission switch module 408 to close.
Wherein, described detect on described transmitting terminal lc resonant network 402 when described transmitting terminal current sensing means 303
When current value is less than predetermined current minimum, in order to protect emission switch module 408, electric current can also be detected whether further
Zero crossing, when current zero-crossing point, emission control module 302 controls emission switch module 408 to close.
As an embodiment, described dc source 401 is induction type electricity getting device, for sensing on high voltage transmission line
Obtain energy and rectifying and wave-filtering forms galvanic current potential source.
This induction type electricity getting device includes taking energy coil, rectifying and wave-filtering, power taking power adjusting, charging and voltage stabilizing circuit, lithium electricity
Pond group, the both positive and negative polarity output end of charging and voltage stabilizing circuit is connected to described transmitting terminal lc resonant network 402 and emission switch mould
Block 408.Thus, sensing electricity getting device obtains energy by sensing on high voltage transmission line, is converted into stable through current rectifying and wave filtering circuit
Voltage source, be the emitting portion energy supply of batch (-type) resonance wireless energy transform device.And batch (-type) resonance wireless energy transfer
Energy is wirelessly transmitted back to bar from the energy obtaining high voltage transmission line in the way of electromagnetic induction by sensing electricity getting device by device
Tower, to the equipment energy supply on shaft tower.
Shown in Figure 4, as an embodiment, described transmitting terminal current sensing means 303 includes: punching Current Mutual Inductance
Device 409, rectification filtering module 403, current maxima comparator 404, current minimum comparator 405 and voltage zero-cross compare
Device 407, wherein voltage zero-crossing comparator 407 pass through to detect that described switch module 408 both end voltage difference judges electric current whether zero passage
Point.Described control module is rs trigger 406.
Punching current transformer 409 induced emission end lc resonant network 402 current oscillation, the induced-current of generation is transferred to
Rectification filtering module 403, is delivered simultaneously to current maxima comparator 404 and current minimum comparator after rectified filtering
405, when current maxima comparator 404 judges that current value exceedes predetermined maximum current value, send to described rs trigger 406
Signal, rs trigger 406 receives after this signal i.e. trigger switch module 408, and now switch module 408 is in closure, therefore
Switch module 408 disconnects after receiving the trigger of rs trigger 406.Current minimum comparator 405 judges that current value is low
When predetermined minimum of a value, to described voltage zero-crossing comparator 407 sending signal, trigger voltage zero-crossing comparator 407 detects simultaneously
Compare the voltage difference at described switch module 408 two ends, if described switch module 408 both end voltage difference reaches zero, this voltage
Zero-crossing comparator is to described rs trigger 406 sending signal, rs trigger 406 trigger switch module 408, now switch module
408 be off (because the internal resistance of switch module 408 is therefore under lc resonant network 402 charged state, this switching molding
The voltage difference at block 408 two ends will not be zero), after therefore receiving the trigger of rs trigger 406, switch module 408 closes,
Dc source 401 starts to charge for lc resonant network 402.
One example structure of the radio energy receiving device that the present invention provides is shown in Figure 5, comprising: receiving terminal lc
Resonant network 501, energy testing apparatus 502, feedback control circuit 504, self-adapting resonance adjusting means 503, energy acquisition are defeated
Go out circuit；
Receiving terminal lc resonant network 501 receives the next electromagnetic wave of transmitting device transmission and produces resonance oscillations, energy measuring
Electric current on device 502 detection this receiving terminal lc resonant network 501 simultaneously exports current value to feedback control circuit 504, feeds back
Control circuit 504 sends control signal according to the change of current value to self-adapting resonance adjusting means 503, and self-adapting resonance is adjusted
Device 503 adjusts the intrinsic frequency of described receiving terminal lc resonant network 501, so that the electric current on receiving terminal lc resonant network 501
Value maximizes；Energy acquisition output circuit exports after processing the current acquisition in described receiving terminal lc resonant network 501.
Feedback control circuit 504 can be by way of gradually approaching under normal circumstances, constantly adjustment receiving terminal lc Resonance Neural Network
The intrinsic frequency of network, to realize current value maximization.That is adjust described receiving terminal in self-adapting resonance adjusting means 503
After the intrinsic frequency of lc resonant network 501, continue, according to the current value result of variations after adjusting, to control self-adapting resonance to adjust dress
Put the intrinsic frequency adjusting receiving terminal lc resonant network, until the current value on lc resonant network maximizes.
As an embodiment, described energy acquisition output circuit includes: matching network 602, rectifying and voltage-stabilizing module
603rd, battery 605 and with electric loading 606.
The output end of receiving terminal lc resonant network 501 connects to described matching network 602, and matching network 602 is used for making to connect
Receiving end lc resonant network 501 internal resistance is mated with receiving terminal equivalent load impedance, and by the electric current on lc resonant network 501 export to
Rectifying and voltage-stabilizing module, is used for making receiving terminal lc resonant network 501 internal resistance mate with receiving terminal equivalent load impedance, so that receiving terminal
The reception energy maximization of load.Optionally, described matching network 602 can be the lc formula matching network of l type, t type, π type etc.；
It can also be other type matching network such as transformer impedance translation circuit.Rectified voltage stabilizing process after electric current export respectively to
Battery 605 and load 606, described battery 605 is simultaneously also to load 606 power supply.
As an embodiment, radio energy receiving device specifically can be using structure as shown in Figure 7:
It is connected in parallel in the resistance to voltage capacitance 610 of receiving terminal lc resonant network 501 by arranging a tunable capacitor, by motor
611 controlling this tunable capacitor, thus the tuning of itself intrinsic frequency of receiving end lc resonant network 501 that achieves a butt joint.
Specifically, described energy testing apparatus 502 include: punching current transformer 612 and rectifying and voltage-stabilizing module 607.
Described feedback control circuit 504 mainly includes a control chip mcu 608.
Described self-adapting resonance adjusting means 503 includes motor drive module 609, motor 611 and humorous with receiving terminal lc
The tunable capacitor of resistance to voltage capacitance 610 parallel connection in vibrating network 501.
Electric current in punching current transformer 612 sensing receiving terminal lc resonant network 501, induced-current is exported to rectification
Voltage stabilizing module 607, inputs to ad (analog-to-digital conversion) module in mcu 608 after rectifying and voltage-stabilizing；Mcu is according to electricity before and after capacitance adjustment
The change of flow valuve, sends Regulate signal to motor drive module 609；Motor drive module 609 controlled motor 611 rotates and adjusts institute
State the capacitance of tunable capacitor.As an embodiment, described motor 611 can be asynchronous machine, adjusted adjustable by rotation
The capacitance of electric capacity.
Described energy acquisition output circuit includes: matching network 602, rectifying and voltage-stabilizing module 603, charging control circuit 604,
Battery 605.
The output end of receiving terminal lc resonant network 501 connects to described matching network 602, and matching network 602 is used for making to connect
The internal resistance of receiving end lc resonant network 501 is mated with receiving terminal equivalent load impedance, and the electric current on lc resonant network 501 is exported
To rectifying and voltage-stabilizing module；Electric current after rectified voltage stabilizing is processed exports respectively to battery 605 and load 606, described battery
605 simultaneously to load 606 power supply.
Described charging control circuit 604 detects battery 605 both end voltage, when magnitude of voltage is less than predetermined threshold, charges
Control circuit 604 is opened and is charged to battery 605, and continues to detect battery 605 both end voltage；When magnitude of voltage reaches battery
During 605 full piezoelectric voltage value (this deterministic process can be realized by presetting max-thresholds), charging control circuit 604
Stop charging to battery 605.
In addition, optional, between described mu balanced circuit 603 and load 606 and charging control circuit 604 and load 606
Between be connected to diode for anti-backflow.
Certainly, it will be recognized by those skilled in the art that being a kind of specific embodiment of the present invention above, acceptable
Realize the capacitance tuning on receiving terminal lc resonant network 501 by other means, for example: can directly adopt high pressure tunable capacitor
As the resistance to voltage capacitance on receiving terminal lc resonant network 501, so need not a tunable capacitor in parallel, and it is humorous directly to adjust this lc
Resistance to voltage capacitance on vibrating network 501；For the high pressure on tunable capacitor in parallel, or receiving terminal lc resonant network 501
Tunable capacitor, it is also possible to take other modes to realize capacitance in addition to the mode above by motor tuning capacitance value
Tuning.
In order to compare peak value as far as possible, the intrinsic frequency adjusting described receiving terminal lc resonant network can adopt dichotomy, that is,
If the trend that described energy testing apparatus detect the current value on lc receiving tank and increase takes a turn for the worse, to next
The regulation value of secondary inductance halves, until peak-peak in the current wave on the lc receiving tank detecting.This two points
Method mode can be used alone the side it is also possible to be a small value with the described regulated quantity increasing or decreasing every time described above
Formula is used in combination, that is, in the examples above, if described energy testing apparatus detect the current value on lc receiving tank
When increased trend takes a turn for the worse, adopt dichotomy further, every time the regulation value of inductance is halved, thus can carry out accurately
Peak value positioning.
Additionally, as an embodiment, described self-adapting resonance adjusting means adjusts described receiving terminal lc resonant network
Intrinsic frequency can be realized by following tuning process:
After power-up initializing, detect the current value on receiving terminal lc resonant network, determine whether zero, if so, then return
Continue detection；If not zero capacitance adjusting on receiving terminal lc resonant network increaseds or decreases a δ c；
Whether judge the current value after capacitance adjustment more than the current value before adjusting, if then continue equidirectional increasing adding deduct
A little δ c, otherwise opposite direction increased or decrease a δ c；
The trend increasing along electric current continues to increased or decrease a δ c, reverses until electric current increase tendency is detected；Then right
After capacitance present value adjusts back a δ c, lock this capacitance, and record this current maximum current value；
Continue detection receiving terminal lc resonant network current value, if present current value be less than record maximum current value and
Exceed given threshold, then return the current value on detection receiving terminal lc resonant network, determine whether zero initial step.
Shown in Figure 7, the mcu Self Adaptive Control flow process of one embodiment of the invention comprises the steps:
Step 701, device power initializes；
Step 702, the current value of the current collection of detection, i.e. ad value be stored as d1；
Step 703, judges whether d1 is equal to 0, and if so, then explanation transmitting terminal does not have normal work, and receiving terminal does not produce sense
Should vibrate, return to step 702 continues detection ad value；If it is not, then entering step 704；
Step 704, capacitance is increased a pre-set fixed value δ c；Can be adjusted by motor in this step
Save described tunable capacitor to realize；
Step 705, the current ad value after detection electric capacity increase, and it is stored as d2；
Step 706, judges whether d2-d1 is more than 0, if the regulation of explanation capacitance present value is in the right direction, then enters step
Rapid 707；Otherwise enter step 709；
Step 707, continues for capacitance to increase a δ c；
Step 708, detects current ad value, and is stored as d2, enters step 713；
Step 713, judges whether d2-d1 is more than 0, if so, then current d2 is set to d1 return to step 707, just continues
To increase capacitance；Otherwise, current d2 is set to d1 and enters step 714；
Step 714, current capacitance is reduced a δ c and temporary stabilization gets off current capacitance tuning, and storage is worked as
Front current value is d1, enters step 715；
The purpose of this step is, through the judgement of step 713, after the electric capacity of step 707 adjusts, to receiving terminal lc resonance
The tuning of network should already exceed maximum summit it is therefore desirable to reversely adjust back a δ c.Certainly because through step
After 707 electric capacity adjustment, actually receiving terminal lc resonant network already in maximum summit near, therefore can also remove this
Step, or the capacitance whole to readjustment is set to less than a δ c fixed value.
Step 709, capacitance is reduced a δ c；
Step 710, the value of detection ad is simultaneously stored as d2；
Step 711, judges whether d2-d1 is more than 0, if then current d2 is set to d1, return to step 709；Otherwise, will
Current d2 is arranged to d1 and enters step 712；
Step 712, capacitance present value is increased a δ c temporary stabilization and gets off current capacitance tuning, and storage is current
Current value is d1, enters step 715；
The purpose of this step is, through the judgement of step 710, after the electric capacity of step 709 adjusts, to receiving terminal lc resonance
The tuning of network should already exceed maximum summit it is therefore desirable to reversely adjust back a δ c.Certainly because through step
After 707 electric capacity adjustment, actually receiving terminal lc resonant network already in maximum summit near, therefore can also remove this
Step, or the capacitance whole to readjustment is set to less than a δ c fixed value.
Step 715, detects the value of current ad and is stored as d2；
Step 716, judges that d2 differs a whether predetermined percentage more than d1 with d1, such as 10%, if so, then illustrate
Severe deviations are produced, return to step 2 re-starts tuning；If it is not, then return to step 715.
Corresponding with upper plane system, present invention also offers a kind of magnet coupled resonant type wireless method of electric energy transfer, bag
Include:
In transmitting equipment, energising power charges to transmitting terminal lc resonant network, and after charging finishes, energising power stops
Power supply；The self-resonance vibration under itself intrinsic frequency of transmitting terminal lc resonant network, and by this transmitting terminal lc resonant network
Energy is transferred out by resonance coil in the form of an electromagnetic wave；
In receiving device, the resonance coil of receiving terminal lc resonant network senses described electromagnetic wave and produces resonance oscillations；
Adjust the intrinsic frequency of this receiving terminal lc resonant network, make the lc resonant network of this receiving terminal lc resonant network and described transmitting terminal
Produce magnetic coupling resonance.
As an embodiment, in transmitting equipment, the method further includes: described transmitting terminal lc resonant network is certainly
In self-resonance oscillatory process under body intrinsic frequency, energy in detection transmitting terminal lc resonant network, when this energy is less than predetermined threshold
When, energising power starts to charge to described transmitting terminal lc resonant network.
Additionally, current maxima and the current minimum of transmitting terminal lc resonant network can be preset；
Described energising power to transmitting terminal lc resonant network charge when, detect the current value of this transmitting terminal lc resonant network,
When current value is higher than described current maxima, energising power is stopped power supply；
In transmitting terminal lc resonant network self-resonance oscillatory process under itself intrinsic frequency, detect this transmitting terminal lc resonance
The current value of network, when current value is less than described current minimum, energising power starts to described transmitting terminal lc resonant network
Charge.
As an embodiment, in receiving device, receiving terminal lc resonant network receives the electricity that transmitting device transmission is come
Magnetic wave after producing resonance oscillations, progressively adjusts the intrinsic frequency of described receiving terminal lc resonant network, detects during adjusting
Electric current on this receiving terminal lc resonant network, until the current value on lc resonant network maximizes.
During above, described intrinsic frequency can be adjusted by adjusting the capacitance on receiving terminal lc resonant network.
The process of the described intrinsic frequency adjusting receiving terminal lc resonant network may include that
After power-up initializing, detect the current value on receiving terminal lc resonant network, determine whether zero, if so, then return
Continue detection；If not zero capacitance adjusting on receiving terminal lc resonant network increaseds or decreases a δ c；
Whether judge the current value after capacitance adjustment more than the current value before adjusting, if then continue equidirectional increasing adding deduct
A little δ c, otherwise opposite direction increased or decrease a δ c；
The trend increasing along electric current continues to increased or decrease a δ c, reverses until electric current increase tendency is detected；Then right
After capacitance present value adjusts back a δ c, lock this capacitance, and record this current maximum current value；
Continue detection receiving terminal lc resonant network current value, if present current value be less than record maximum current value and
Exceed given threshold, then return the current value on detection receiving terminal lc resonant network, determine whether zero initial step.
From above content can be seen that the embodiment of the present invention resolution circuitry topological structure simple, install convenient, pass
Defeated power is big, and efficiency high has very strong adaptive ability.Control compared with traditional Multi- Switch DC inversion circuit, decrease out
Close loss, and only one of which switch control rule, improve security and practicality, engineering cost greatly reduces.And due to
Formula of having a rest pass can feature, switching frequency, well below frequency of oscillation, effectively prevent the inclusion causing because switching frequency is too high:
HF switch, control chip, lc resonant network etc. are in a series of interior difficult problems.Directly constitute frequency-selective network using transmitting coil,
System is made to shake frequency concussion forever in resonant frequency, efficiency maximizes.Its frequency self adaptation is all built with basic circuit, patrols
Collect simple, there is no software programming, improve reliability and reaction speed, the self-control under achievable high-frequency, have stronger
Adaptive ability.
In the present invention, because transmitting terminal lc resonant network and receiving terminal lc resonant network frequency have good matching,
When equipment is installed, the axis of the receiving coil in transmitting coil and receiving terminal lc resonant network not necessarily requires and is completely superposed
On straight line.Of course for ensureing preferably magnetic coupling, preferred emission coil as far as possible should not deviation with receiving coil axis
Too much；If the distance between transmitting coil and receiving coil are at 2～5 meters, receiving coil axis relative transmission coil axis
Angle can be within ± 30 °.In addition, the axis of transmitting coil and both receiving coils can also be parallel but be staggered necessarily not relatively
Small distance, the distance that staggers, without departing from 2 times of transmitting coil diameter, is all generally acceptable.
The technology of the present invention radio energy-transmitting efficiency high, device structure is simple, does not also have too high request to the technique passing energy coil.
By current experiment, as long as slightly arranging to coil, you can realize the wireless energy transfer in the range of 2～5 meters, efficiency of transmission
40% can be reached.The application of the therefore present invention is quite varied, you can for the radio energy-transmitting on power line it is also possible to be used for
The scenes such as the radio energy-transmitting of various needs, wireless power transmission, wireless charging.
Fig. 8 is a concrete application implementation of radio energy transmission system of the present invention.The radio energy of the present invention
Transmitting equipment is arranged on the tower bar of power line, and by induction type electricity getting device, sensing from high voltage transmission line obtains energy simultaneously
Rectifying and wave-filtering forms galvanic current potential source, powers to transmitting terminal lc resonant network.Transmitting terminal lc resonant network passes through itself
Intrinsic frequency vibrates, and intermittently converts electrical energy into electromagnetic wave outside transmission.Receiving terminal lc resonant network in receiving device
After sensing this electromagnetic wave, start to vibrate therewith, humorous by the self-adapting tuning circuit tuning receiving terminal lc within receiving device
The intrinsic frequency of vibrating network, makes receiving terminal lc resonant network and the lc resonant network of transmitting terminal produce resonance, realizes magnetic coupling with this
Close, thus the energy acceptance that transmitting terminal lc resonant network is launched gets off, realize the demands such as power supplied locally and energy stores.By
In the insulation characterisitic of air, this radio energy-transmitting mode can be prevented effectively from the short circuit problem during high pressure power taking.In high pressure
Power transmission line takes the fields such as energy, wireless charging to be with a wide range of applications.
Those of ordinary skill in the art it is understood that the foregoing is only the specific embodiment of the present invention, and
It is not used in the restriction present invention, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., all
Should be included within protection scope of the present invention.
Claims (17)
1. a kind of magnet coupled resonant type wireless electric energy transmission system is it is characterised in that include: transmitting equipment and receiving device；
Transmitting terminal lc resonant network, energising power and self-resonance control circuit is included in transmitting equipment；Described self-resonance
Control circuit also includes: transmitting terminal current sensing means, emission control module, emission switch module, described energising power, transmitting
Switch module is connected in series with transmitting terminal lc resonant network；Described transmitting terminal current sensing means is used for detecting transmitting terminal lc resonance
The current value detecting simultaneously is transferred to emission control module by the electric current on network；Described emission control module is used for controlling transmitting
Switch module is opened or closed；After described emission switch module closure, energising power charges to transmitting terminal lc resonant network, from humorous
After charging finishes, described emission control module controls emission switch module to disconnect the power supply of energising power to control circuit of shaking；Send out
Penetrate the self-resonance vibration under itself intrinsic frequency of end lc resonant network, and by the resonance coil in this transmitting terminal lc resonant network
Energy is transferred out in the form of an electromagnetic wave；
Receiving terminal lc resonant network and Automatic adjusument circuit is included in receiving device；Described Automatic adjusument circuit bag
Include: energy testing apparatus, feedback control circuit, self-adapting resonance adjusting means；The resonance coil sense of receiving terminal lc resonant network
Answer described electromagnetic wave and produce resonance oscillations；Energy testing apparatus detect electric current on this receiving terminal lc resonant network and by electric current
To feedback control circuit, feedback control circuit sends to self-adapting resonance adjusting means according to the change of current value and controls for value output
Signal, described self-adapting resonance adjusting means adjusts the intrinsic frequency of described receiving terminal lc resonant network, so that receiving terminal lc is humorous
Current value on vibrating network maximizes；Described Automatic adjusument circuit passes through to adjust the intrinsic frequency of this receiving terminal lc resonant network
Rate, makes this receiving terminal lc resonant network and the lc resonant network of described transmitting terminal produce magnetic coupling resonance.
2. according to claim 1 system it is characterised in that described transmitting terminal lc resonant network under itself intrinsic frequency from
During resonance oscillations, when self-resonance control circuit detects in transmitting terminal lc resonant network energy and is less than predetermined threshold, closure
Energising power starts to charge to described transmitting terminal lc resonant network.
3. according to claim 2 system it is characterised in that in described transmitting equipment energising power be constant voltage direct current
Power supply；
After described emission switch module closure, dc source starts to charge to described transmitting terminal lc resonant network, when transmitting terminal electricity
Flow detection device detects current value when being higher than predetermined current maxima, and emission control module controls emission switch module to break
Open, enable transmitting terminal lc resonant network to start self-oscillation and to unofficial biography；Described in detecting when described transmitting terminal current sensing means
When current value on transmitting terminal lc resonant network is less than predetermined current minimum, emission control module controls emission switch module
Closure.
4. according to claim 3 system it is characterised in that described when described transmitting terminal current sensing means detect described
When current value on transmitting terminal lc resonant network is less than predetermined current minimum, also detection electric current whether zero crossing, work as electric current
During zero crossing, emission control module controls emission switch module closure.
5. according to claim 3 system it is characterised in that described dc source be induction type electricity getting device, for from height
On pressure power transmission line, sensing obtains energy and rectifying and wave-filtering forms galvanic current potential source.
6. according to claim 1 system it is characterised in that also including energy acquisition output circuit in receiving device；
Described self-adapting resonance adjusting means adjusts the intrinsic frequency of described receiving terminal lc resonant network, so that receiving terminal lc resonance
Current value on network maximizes；
Energy acquisition output circuit exports after processing the current acquisition in described receiving terminal lc resonant network.
7. according to claim 6 system it is characterised in that described energy testing apparatus include: punching current transformer and
Rectifying and voltage-stabilizing module；Described feedback control circuit is mcu；Described self-adapting resonance adjusting means includes motor drive module, electricity
Machine and the tunable capacitor in parallel with the resistance to voltage capacitance in receiving terminal lc resonant network；
Electric current in punching current transformer sensing receiving terminal lc resonant network, induced-current is exported to rectifying and voltage-stabilizing module,
The ad module in mcu is inputed to after rectifying and voltage-stabilizing；Mcu, according to the change of current value before and after adjusting, sends Regulate signal to motor
Drive module；Motor drive module controlled motor adjusts the capacitance of described tunable capacitor.
8. according to claim 6 system it is characterised in that described energy acquisition output circuit includes: matching network, rectification
Voltage stabilizing module, charging control circuit, battery；
The output end of receiving terminal lc resonant network connects to described matching network, and matching network is used for making receiving terminal lc resonant network
Internal resistance is mated with receiving terminal equivalent load impedance, and the electric current on receiving terminal lc resonant network is exported to rectifying and voltage-stabilizing module；
Electric current after rectified voltage stabilizing is processed exports respectively to battery and load, and described battery powers to the load simultaneously；
Described charging control circuit detects battery both end voltage, and when magnitude of voltage is less than predetermined threshold, charging control circuit is opened
Open and charge to battery, and continue to detect battery both end voltage；When magnitude of voltage reaches the full piezoelectric voltage value of battery, control of charging
Circuit processed stops charging to battery.
9. system according to claim 8 it is characterised in that described rectifying and voltage-stabilizing module and load between and charge control
It is connected to the diode for anti-backflow between circuit processed and load.
10. system according to claim 6 is it is characterised in that described self-adapting resonance adjusting means adjusts described reception
The process of the intrinsic frequency of end lc resonant network includes:
After power-up initializing, detect the current value on receiving terminal lc resonant network, determine whether zero, if so, then return and continue
Detection；If not zero capacitance adjusting on receiving terminal lc resonant network increaseds or decreases a δ c；
Judge the current value after capacitance adjustment whether more than the current value before adjusting, if then continuing equidirectional to increased or decrease one
Individual δ c, otherwise opposite direction increased or decrease a δ c；
The trend increasing along electric current continues to increased or decrease a δ c, reverses until electric current increase tendency is detected；Then to current
After capacitance adjusts back a δ c, lock this capacitance, and record current maximum current value；
Continue the current value of detection receiving terminal lc resonant network, if present current value is less than the maximum current value of record and exceedes
Given threshold, then return the current value on detection receiving terminal lc resonant network, determine whether zero initial step.
11. systems according to claim 1 are it is characterised in that the resonance coil of transmitting terminal lc resonant network and receiving terminal
The distance between resonance coil of lc resonant network at 2 ~ 5 meters, the resonance coil axis relative transmission of receiving terminal lc resonant network
The angle of the resonance coil axis of end lc resonant network is within ± 30；
Or the diameter parallel of both resonance coils of the resonance coil of transmitting terminal lc resonant network and receiving terminal lc resonant network
But the distance that is staggered is without departing from 2 times of the resonance coil diameter of transmitting terminal lc resonant network.
A kind of 12. magnet coupled resonant type wireless method of electric energy transfer are it is characterised in that be applied to set including transmitting equipment and reception
Standby system；
Transmitting terminal lc resonant network, energising power and self-resonance control circuit is included in transmitting equipment；Described self-resonance
Control circuit also includes: transmitting terminal current sensing means, emission control module, emission switch module, described energising power, transmitting
Switch module is connected in series with transmitting terminal lc resonant network；Described transmitting terminal current sensing means is used for detecting transmitting terminal lc resonance
The current value detecting simultaneously is transferred to emission control module by the electric current on network；Described emission control module is used for controlling transmitting
Switch module is opened or closed；
Receiving terminal lc resonant network and Automatic adjusument circuit is included in receiving device；Described Automatic adjusument circuit bag
Include: energy testing apparatus, feedback control circuit, self-adapting resonance adjusting means；Methods described includes:
In transmitting equipment, energising power charges to transmitting terminal lc resonant network, after charging finishes, described emission control module
Emission switch module is controlled to disconnect, energising power is stopped power supply；
The self-resonance vibration under itself intrinsic frequency of transmitting terminal lc resonant network, and by humorous in this transmitting terminal lc resonant network
Energy is transferred out by the coil that shakes in the form of an electromagnetic wave；
In receiving device, the resonance coil of receiving terminal lc resonant network senses described electromagnetic wave and produces resonance oscillations；
Energy testing apparatus detect electric current on this receiving terminal lc resonant network and export to feedback control circuit by current value, instead
Feedback control circuit sends control signal according to the change of current value to self-adapting resonance adjusting means, and described self-adapting resonance is adjusted
Device adjusts the intrinsic frequency of described receiving terminal lc resonant network, so that the current value on receiving terminal lc resonant network maximizes；
Described Automatic adjusument circuit pass through adjust this receiving terminal lc resonant network intrinsic frequency, make this receiving terminal lc resonant network with
The lc resonant network of described transmitting terminal produces magnetic coupling resonance.
13. according to claim 12 methods described it is characterised in that the method further includes: described transmitting terminal lc Resonance Neural Network
In network self-resonance oscillatory process under itself intrinsic frequency, energy in detection transmitting terminal lc resonant network, when this energy is less than in advance
When determining threshold value, energising power starts to charge to described transmitting terminal lc resonant network.
14. according to claim 13 methods described it is characterised in that presetting the current maxima of transmitting terminal lc resonant network
And current minimum；
Described energising power to transmitting terminal lc resonant network charge when, detect the current value of this transmitting terminal lc resonant network, work as electricity
When flow valuve is higher than described current maxima, energising power is stopped power supply；
In transmitting terminal lc resonant network self-resonance oscillatory process under itself intrinsic frequency, detect this transmitting terminal lc resonant network
Current value, when current value be less than described current minimum when, energising power start to described transmitting terminal lc resonant network charge.
15. according to claim 12 methods described it is characterised in that receiving terminal lc resonant network receive transmitting device transmission Lai
Electromagnetic wave after producing resonance oscillations, progressively adjusts the intrinsic frequency of described receiving terminal lc resonant network, examines during adjusting
Survey the electric current on this receiving terminal lc resonant network, until the current value on receiving terminal lc resonant network maximizes.
16. according to claim 15 methods described it is characterised in that by adjust receiving terminal lc resonant network on capacitance Lai
Adjust the intrinsic frequency of described receiving terminal lc resonant network.
17. according to claim 15 methods described it is characterised in that the intrinsic frequency of described regulation receiving terminal lc resonant network
Process includes:
After power-up initializing, detect the current value on receiving terminal lc resonant network, determine whether zero, if so, then return and continue
Detection；If not zero capacitance adjusting on receiving terminal lc resonant network increaseds or decreases a δ c；
Judge the current value after capacitance adjustment whether more than the current value before adjusting, if then continuing equidirectional to increased or decrease one
Individual δ c, otherwise opposite direction increased or decrease a δ c；
The trend increasing along electric current continues to increased or decrease a δ c, reverses until electric current increase tendency is detected；Then to current
After capacitance adjusts back a δ c, lock this capacitance, and record current maximum current value；
Continue the current value of detection receiving terminal lc resonant network, if present current value is less than the maximum current value of record and exceedes
Given threshold, then return the current value on detection receiving terminal lc resonant network, determine whether zero initial step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410398980.5A CN104638774B (en) | 2014-08-13 | 2014-08-13 | Magnetic-coupling resonant wireless power transmission system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410398980.5A CN104638774B (en) | 2014-08-13 | 2014-08-13 | Magnetic-coupling resonant wireless power transmission system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104638774A CN104638774A (en) | 2015-05-20 |
| CN104638774B true CN104638774B (en) | 2017-01-25 |
Family
ID=53217218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410398980.5A Active CN104638774B (en) | 2014-08-13 | 2014-08-13 | Magnetic-coupling resonant wireless power transmission system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104638774B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915194A (en) * | 2016-05-10 | 2016-08-31 | 华东交通大学 | Frequency selection narrowband band pass filter based on magnetic resonance coupling |
| CN107623549A (en) * | 2016-07-15 | 2018-01-23 | 深圳光启高等理工研究院 | Radio optical communication system |
| CN106300699A (en) * | 2016-09-18 | 2017-01-04 | 青岛海信电器股份有限公司 | Wireless charging receiver, wireless charging system and charge control method thereof |
| CN106405332A (en) * | 2016-09-26 | 2017-02-15 | 武汉大学 | Continuous operation performance testing method for magnetic resonance type wireless energy transmission system |
| EP4277084A3 (en) * | 2017-03-07 | 2024-04-10 | Powermat Technologies Ltd. | System for wireless power charging |
| CN106998101A (en) * | 2017-04-19 | 2017-08-01 | 青岛鲁渝能源科技有限公司 | Coupling device and radio energy transmission system |
| CN108312880A (en) * | 2018-02-21 | 2018-07-24 | 李家琪 | A kind of remote controlled intelligent charging spot |
| CN109286249B (en) * | 2018-10-29 | 2024-03-22 | 兰州大学 | Wireless energy transmission system |
| CN109286235B (en) * | 2018-11-27 | 2023-08-22 | 南方电网科学研究院有限责任公司 | Power supply system of power system monitoring equipment |
| WO2020220174A1 (en) * | 2019-04-28 | 2020-11-05 | Oppo广东移动通信有限公司 | Power matching method and apparatus for wireless charging, and wireless charging apparatus |
| CN110323961B (en) * | 2019-06-03 | 2020-09-08 | 杭州电子科技大学 | Magnetic coupling resonant wireless energy transmission and collection system of friction nano generator |
| CN110365122B (en) * | 2019-06-03 | 2020-09-08 | 杭州电子科技大学 | Self-powered wireless sensing system based on friction nano generator |
| CN111355289B (en) * | 2020-04-16 | 2022-05-31 | 吉林大学 | Wireless charging constant current transmitting system for mobile phone |
| CN114070293A (en) * | 2021-11-01 | 2022-02-18 | 深圳市绘王动漫科技有限公司 | Electromagnetic coding switch and rotation information calculation method of rotating wheel |
| CN116131479B (en) * | 2023-01-30 | 2023-09-29 | 巨翼(苏州)新动力有限公司 | Bidirectional resonance wireless charging system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860087A (en) * | 2010-05-11 | 2010-10-13 | 浙江大学 | Method and system for improving wireless energy transmission efficiency by using feedback tuning method |
| CN102237724A (en) * | 2010-04-24 | 2011-11-09 | 祝常红 | Self-adaptive wireless charging system for electric vehicle |
| CN103023158A (en) * | 2011-09-21 | 2013-04-03 | 三星电子株式会社 | Wireless power transmission system and wireless power transmission method |
-
2014
- 2014-08-13 CN CN201410398980.5A patent/CN104638774B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102237724A (en) * | 2010-04-24 | 2011-11-09 | 祝常红 | Self-adaptive wireless charging system for electric vehicle |
| CN101860087A (en) * | 2010-05-11 | 2010-10-13 | 浙江大学 | Method and system for improving wireless energy transmission efficiency by using feedback tuning method |
| CN103023158A (en) * | 2011-09-21 | 2013-04-03 | 三星电子株式会社 | Wireless power transmission system and wireless power transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104638774A (en) | 2015-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104638774B (en) | Magnetic-coupling resonant wireless power transmission system and method | |
| CN104659929B (en) | Magnetic coupling resonance wireless power transmitting equipment and method | |
| CN104659930B (en) | Radio energy receiving equipment and the method for adaptive frequency | |
| CN106921222B (en) | Non-contact power transmission device and electrical power transmission system | |
| CN103457362B (en) | The dispensing device of wireless charging, wireless charging system and wireless charging control method | |
| JP5569182B2 (en) | Non-contact power transmission system, non-contact power transmission device, and impedance adjustment method | |
| US20130026848A1 (en) | Non-contact power transmission system | |
| Le et al. | Wireless power transfer near-field technologies for unmanned aerial vehicles (UAVs): A review | |
| CN101924387A (en) | Feedback type wireless charger | |
| JP6001355B2 (en) | Non-contact power feeding device | |
| JP5419857B2 (en) | Secondary power receiving circuit of non-contact power supply equipment | |
| CN102891538A (en) | Line patrol robot wireless charging system | |
| CN103229383A (en) | A wirelessly rechargeable battery and power transmitter | |
| Zhang et al. | A management circuit with upconversion oscillation technology for electric-field energy harvesting | |
| CN102170177A (en) | High-power wireless power transmission system | |
| US20140239728A1 (en) | Power transmission system | |
| CN206283301U (en) | Cable tunnel inspection robot wireless charging system based on overlapping four transmitting coils | |
| CN103560597A (en) | Efficient wireless electricity transmission system with adjustable power in large range and control method | |
| CN110554236A (en) | Frequency online detection method for constant-voltage or constant-current output of wireless power transmission | |
| CN104038102A (en) | Composite magnetic coupling effect based device for harvesting energy from magnetic field of conductor | |
| CN105406606A (en) | Wireless charging method and wireless charging emission device | |
| Li et al. | Study on efficiency maximization design principles for wireless power transfer system using magnetic resonant coupling | |
| CN211236016U (en) | Frequency online detection circuit for constant voltage or constant current output in wireless power transmission | |
| CN110311476A (en) | A kind of intelligent radio charging unit and its control method for mobile terminal | |
| CN105515077A (en) | Laser charging processing method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |