CN104659930A - Wireless electric energy receiving equipment and method for self-adaptive frequency - Google Patents
Wireless electric energy receiving equipment and method for self-adaptive frequency Download PDFInfo
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Abstract
The invention provides wireless electric energy receiving equipment and a wireless electric energy receiving method for self-adaptive frequency. The wireless electric energy receiving method comprises the following steps: receiving electromagnetic waves transmitted from transmitting equipment and generating resonance oscillation through an LC resonance network at a receiving terminal; detecting the current of the LC resonance network at the receiving terminal and outputting the current to a feedback control circuit through an energy detection device; transmitting a control signal to a self-adaptive resonance adjusting device through the feedback control circuit according to change of the current, and adjusting the inherent frequency of the LC resonance network at the receiving terminal through the self-adaptive adjusting device after receiving the control signal; continuously controlling the self-adaptive adjusting device to adjust the inherent frequency of the LC resonance network at the receiving terminal through the feedback control circuit according to the adjusted current change result until the current of the LC resonance network is maximized; acquiring, processing and outputting current of the LC resonance network through an energy acquisition output circuit. By adopting the equipment and the method, electromagnetic energy transmitted from a wireless electric energy transmitting device can be received in a self-adaptive manner.
Description
Technical field
The present invention relates to wireless power transmission technology, refer to a kind of radio energy receiving equipment and method of adaptive frequency especially.
Background technology
China is greatly developing in intelligent power grid technology, and the equipment be arranged on transmission tower does not have working power, and traditional way adopts the combination of solar energy pole plate and storage battery to provide equipment working power, and the later maintenance cost of this supply power mode is higher.And ultra-high-tension power transmission line induction power taking technology is equipotential power taking, provide working power can to work equipment on the line.But the equipment be operated on shaft tower does not still have working power, if by wire by electrical energy transfer to shaft tower, equivalent by the high potential of transmission line and earth potential short circuit, can not implement.
Wireless power transmission (Wireless Power Transmission, WPT), namely wireless power transmission is a kind of new technique carrying out energy transferring by means of electromagnetic field or electromagnetic wave.Along with the development of science and technology, traditional power transmission mode is difficult to meet its power demands.Therefore, the importance developing wireless power transmission technology highlights day by day.
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 transferring between the rotor of generator, motor utilizes this principle exactly, and transmission range is grade.Electromagnetic radiation formula long transmission distance, but if isotropic directivity radiation, the efficiency of electric energy transmitting can be very low; And if directed radiation, have and pay no attention to disconnected visual orientation and very complicated tracking instrument and equipment, its development difficulty is very large.Electromagentic resonance formula, mainly utilizes magnet coupled resonant type delivery of energy technology, is the breakthrough to induction type, can realize high efficiency energy transmission in theory in the scope of several meters, once the power mode technically made a breakthrough changing 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) the earliest, and obtains preliminary experimental verification in 2007, and experimental result has been published in " Science " magazine.This technological essence relies on magnetic field transferring energy, it is by the coupling in magnetic field between resonance coil, and the resonance by the generation of transmitting and receiving coil realizes the wireless transmission of energy.Technique in theory can at the energy of meter level Distance Transmission relatively high power, has simultaneously and passes through non-magnetic barrier, to the outstanding advantages such as relative position requirement is lower.
The basic implementation of this technology mainly arranges delivery of energy power supply, drive circuit and radiating circuit at transmitting terminal; At receiving terminal, receiving circuit and voltage stabilizing circuit etc. are set.The wherein LC oscillation circuit that is generally made up of transmitting coil and electric capacity of radiating circuit, the LC oscillation circuit that receiving circuit is made up of receiving coil and electric capacity.There is provided lasting Energy transmission by delivery of energy power supply to transmitting coil, produce drive singal stimulated emission coil resonance by drive circuit, 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 by the Energy Transfer of delivery of energy power supply to receiving coil.
Shown in Figure 1, be the structure of a kind of exemplary implementation of the prior art.Comprise DC power supply, switching circuit, radiating circuit, booster, resonance receiving circuit five parts.Wherein, DC power supply, switching circuit and radiating circuit are connected in series, and pass through switching circuit, as the drive circuit producing drive singal, control switch pipe T turns on and off, thus obtains the high frequency square wave voltage of stimulated emission circuit resonance, makes the LC loop of radiating circuit produce the higher-order of oscillation; The LC loop of receiving circuit produces simultaneous resonance, receives the energy that radiating circuit is launched.
Be the Research Challenges of this technology at present: in order to improve efficiency of transmission and transmission range, making it reach can application level, all frequency of oscillation of an urgent demand raising radiating circuit.But require the LC oscillation circuit frequency improving radiating circuit so on the one hand, simultaneously also require that drive circuit produces the high-frequency driving signal matched, and the LC oscillation circuit frequency of requirement at high frequencies in this drive singal and radiating circuit keeps Complete Synchronization.General way is after the natural mode shape of Accurate Measurement radiating circuit, then arranges the occurrence frequency of drive singal, and also needs when equipment works to regulate this driving signal frequency synchronous with LC recirculating loop frequency.But along with the raising of transmitting coil frequency of oscillation, the switching frequency that the device of control switch pipe T self determines and opportunity are difficult to regulate, and be therefore difficult to realize accurate control, coil cannot be made all to vibrate in resonance frequency at any time.
The switching frequency of control switch pipe T also will reach the frequency of oscillation of radiating circuit, also very large to the loss of control switch.
The resonance frequency of receiving circuit also must be consistent with the tranmitting frequency of radiating circuit, therefore requires all higher to transmitting coil or the processing technology of receiving coil.
And along with the change of the external environment condition such as temperature, humidity, discrete inductance parameter is also changing thereupon, and due to radio energy-transmitting device discrete parameter complexity, coil is easily being subject to peripheral circuit interference, causes frequency to drift about.And the frequency of prior art drive singal can not adaptively modifying thereupon, thus reliability and the efficiency of wireless energy transfer will be had a strong impact on.Thus to wireless power transmission technology, in engineering, particularly the practical application of high voltage power transmission field and popularization cause very large obstacle.At present neither one scheme can head it off well all the time.
Summary of the invention
In view of this, the object of the invention is to the radio energy receiving equipment and the method that propose a kind of adaptive frequency, pass can control the difficult problems such as difficult, adaptivity difference by scheme high frequency to solve conventional wireless.
Based on above-mentioned purpose radio energy receiving equipment provided by the invention, comprising: receiving terminal LC resonant network, energy testing apparatus, feedback control circuit, self-adapting resonance adjusting device, energy acquisition output circuit;
Receiving terminal LC resonant network receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations; Energy testing apparatus detects the electric current on this receiving terminal LC oscillation network and current value is exported to feedback control circuit; Feedback control circuit transmits control signal to self-adapting resonance adjusting device according to the change of current value, and self-adaptive regulating regulates the natural frequency of described receiving terminal LC oscillation network after receiving this control signal; Feedback control circuit continues the current value result of variations after according to adjustment, controls the natural frequency that self-adaptive regulating regulates receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes;
Energy acquisition output circuit exports after the current acquisition process in described LC oscillation network.
Optionally, in this receiving equipment, described energy testing apparatus comprises: punching current transformer and rectifying and voltage-stabilizing module; Described feedback control circuit is MCU; Described self-adapting resonance adjusting device comprises motor drive module, motor and the tunable capacitor with the withstand voltage Capacitance parallel connection in receiving terminal LC resonant network;
Electric current in punching current transformer induction receiving terminal LC resonant network, exports rectifying and voltage-stabilizing module to, inputs to the A/D module in MCU after rectifying and voltage-stabilizing by induced current; MCU, according to the change regulating front and back current value, sends conditioning signal to motor drive module; Motor drive module controls the capacitance that motor regulates described tunable capacitor.
Optionally, in this receiving equipment, described energy acquisition output circuit comprises: matching network, rectifying and voltage-stabilizing module, charging control circuit, storage battery;
The output of receiving terminal LC resonant network is connected to described matching network, and matching network is used for the internal resistance of receiving terminal LC resonant network is mated with receiving terminal equivalent load impedance, and exports the electric current on LC resonant network to rectifying and voltage-stabilizing module; Electric current after rectifying and voltage-stabilizing process exports storage battery and load respectively to, and described storage battery powers to the load simultaneously;
Described charging control circuit detects storage battery both end voltage, and when magnitude of voltage is lower than predetermined threshold, charging control circuit is opened to charge in batteries, and continues to detect storage battery both end voltage; When magnitude of voltage reaches the full piezoelectric voltage value of storage battery, charging control circuit stops to charge in batteries.
Optionally, in this receiving equipment, between described voltage stabilizing circuit and load and between charging control circuit and load, be connected to the diode for anti-backflow.
Optionally, in this receiving equipment, described self-adaptive regulating regulates the process of the natural frequency of described receiving terminal LC oscillation network to comprise:
After power-up initializing, detect the current value on receiving terminal LC resonant network, determine whether zero, if so, then return and continue to detect; If not zero regulates the capacitance on receiving terminal LC resonant network increase or reduce a Δ C;
Judge the current value after capacitance adjustment whether be greater than adjustment before current value, if then continue equidirectional increase or reduce a Δ C, otherwise increase in the other direction or reduce a Δ C;
The trend increased along electric current continues to increase or reduce a Δ C, until detect that electric current increase tendency reverses; After then a Δ C being adjusted back to capacitance present value, lock this capacitance, and record this current lowest high-current value;
Continue the current value detecting receiving terminal LC resonant network, if present current value in record lowest high-current value and exceed setting threshold, then return the current value detected on receiving terminal LC resonant network, determine whether the initial step of zero.
In another aspect of this invention, additionally provide a kind of radio energy method of reseptance of adaptive frequency, comprising:
Receiving terminal LC resonant network receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations;
Detect electric current on this receiving terminal LC oscillation network and by current value;
The natural frequency of described receiving terminal LC oscillation network is regulated according to the change of current value;
According to the current value result of variations after adjustment, regulate the natural frequency of receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes;
Export after the current acquisition process in described LC oscillation network.
Optionally, the method regulates described natural frequency by regulating the capacitance on receiving terminal LC resonant network.
Optionally, the method adopts the mode of dichotomy progressively to regulate the natural frequency of described receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes.
Optionally, the process of the natural frequency of receiving terminal LC oscillation network is regulated to comprise described in the method:
After power-up initializing, detect the current value on receiving terminal LC resonant network, determine whether zero, if so, then return and continue to detect; If not zero regulates the capacitance on receiving terminal LC resonant network increase or reduce a Δ C;
Judge the current value after capacitance adjustment whether be greater than adjustment before current value, if then continue equidirectional increase or reduce a Δ C, otherwise increase in the other direction or reduce a Δ C;
The trend increased along electric current continues to increase or reduce a Δ C, until detect that electric current increase tendency reverses; After then a Δ C being adjusted back to capacitance present value, lock this capacitance, and record this current lowest high-current value;
Continue the current value detecting receiving terminal LC resonant network, if present current value in record lowest high-current value and exceed setting threshold, then return the current value detected on receiving terminal LC resonant network, determine whether the initial step of zero.As can be seen from above, the radio energy receiving equipment of adaptive frequency provided by the invention and method, do not adopt outside drive singal to control the vibration of radiating circuit, but breach original thoughtcast, utilize LC loop natural frequency in radiating circuit to realize Energy Transfer.No longer be concerned about whether the frequency of drive singal can keep consistent with the frequency of radiating circuit and synchronous, and whether the energy only paid close attention in radiating circuit reaches transmission requirement.At receiving terminal by adaptive mode, receiving circuit frequency is made to remain consistent with the frequency of radiating circuit.Thus achieve Energy Transfer well, effectively improve efficiency of transmission.The solution of the present invention is had the following advantages:
1, equipment dependability and adaptivity effectively promote, and the circuit topological structure of transmitting terminal is simple, not needing the drive circuit producing drive singal, avoiding as realizing the driving signal frequency complex control consistent and synchronous with radiating circuit frequency.In addition, because control procedure is simple, frequency self-adaption is all built with basic circuit, and logic is simple, does not have software programming, improves reliability and reaction speed, can realize the self-control under high-frequency, have stronger adaptive ability.Particularly when being used in ultra-high-tension power transmission line power taking, because transmitter closes on high voltage transmission line, its electromagnetic radiation is very strong, easily interference is caused to transmitter, generation frequency drifts about, even damage the control chip in transmitter, transmitting terminal of the present invention due to topological structure simple and chip can not be needed to realize controlling, therefore, it is possible to effective lifting means reliability.
2, efficiency of transmission significantly improves, and the present invention utilizes radiating circuit directly to form frequency-selective network, makes system shake frequency and forever shakes in the resonance frequency of radiating circuit, solve radiating circuit medium frequency matching problem.And by taking Automatic adjusument mode to receiving circuit, receiving circuit is also operated in resonance frequency, even if the factors such as external environment condition cause tranmitting frequency to change, receiving terminal also can realize frequency match well, transmitting terminal and receiving terminal is made to remain synchronous, produce resonance effects, thus efficiency of transmission significantly improves.In addition, in the present invention, transmitting terminal is due to the restriction without the need to being subject to driving signal control circuit, the frequency of oscillation transmitted can significantly improve, and high-frequency can effectively avoid energy dissipation in electron waves transmitting procedure, effectively can improve the efficiency of radio energy-transmitting and pass energy distance.Generally, the present invention does not need booster, can realize effective transmission of wireless energy.
3, the fail safe of equipment, practicality are high, greatly reduce costs.Compared with traditional Multi-Switch DC inversion control circui, because batch (-type) of the present invention passes the feature of energy, in the present invention, the switching frequency of transmitting terminal obviously reduces, switching frequency is well below frequency of oscillation, effectively prevent some the row difficult problems caused because switching frequency is too high, as driving chip difficulty is looked for, seldom there is the MOS driving chip of megahertz rank; Have high requirement to metal-oxide-semiconductor rising edge and trailing edge time delay, if resonance frequency is 1M hertz, the rise and fall of switch along time to control within 50ns; Under high frequency situations, the economize on electricity of switch self is held, and the mutual inductance between wire cannot be ignored, and actual fabrication difficulty is very large.In addition, due to the present invention program to the own frequency of radiating circuit and receiving circuit all less than very high required precision, make the processing technology of transmitting coil and receiving coil become simple, greatly reduce production cost.
Wireless power transmission systems of the present invention is through Practical on-site test, and reliability, energy transfer efficiency and biography apart from all apparently higher than prior art, can make this technology depart from laboratory stage, reach the level of practical application.Utilize radio energy transmission system of the present invention, electromagnetic transmission energy can be converted electrical energy into, middle by air insulation, effectively can avoid short circuit problem.The fields such as energy, wireless charging of getting at high voltage transmission line are with a wide range of applications.
Accompanying drawing explanation
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 delivery of electrical energy transmitter;
Fig. 4 is the structural representation of a transmitter of the present invention specific embodiment;
Fig. 5 is the structured flowchart of embodiment of the present invention magnet coupled resonant type wireless delivery of electrical energy receiving equipment;
Fig. 6 is the structural representation of a receiving equipment of the present invention specific embodiment;
Fig. 7 is the Adaptive matching control flow chart of embodiment of the present invention receiving equipment;
Fig. 8 is the application schematic diagram of embodiment of the present invention radio energy transmission system on high voltage transmission line.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As one embodiment of the present of invention, radio energy receiving equipment mainly comprises: receiving terminal LC resonant network, energy testing apparatus, feedback control circuit, self-adapting resonance adjusting device, energy acquisition output circuit;
Receiving terminal LC resonant network receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations; Energy testing apparatus detects the electric current on this receiving terminal LC oscillation network and current value is exported to feedback control circuit; Feedback control circuit transmits control signal to self-adapting resonance adjusting device according to the change of current value, and self-adaptive regulating regulates the natural frequency of described receiving terminal LC oscillation network after receiving this control signal; Feedback control circuit continues the current value result of variations after according to adjustment, controls the natural frequency that self-adaptive regulating regulates receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes;
Energy acquisition output circuit exports after the current acquisition process in described LC oscillation network.
The structure of an embodiment of radio energy receiving equipment provided by the invention is shown in Figure 5, comprising: receiving terminal LC resonant network 501, energy testing apparatus 502, feedback control circuit 504, self-adapting resonance adjusting device 503, energy acquisition output circuit;
Receiving terminal LC resonant network 501 receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations, energy testing apparatus 502 detects the electric current on this receiving terminal LC oscillation network 501 and current value is exported to feedback control circuit 504, feedback control circuit 504 transmits control signal to self-adapting resonance adjusting device 503 according to the change of current value, self-adaptive regulating 503 regulates the natural frequency of described receiving terminal LC oscillation network 501, maximizes to make the current value on receiving terminal LC oscillation network 501; Energy acquisition output circuit exports after the current acquisition process in described receiving terminal LC oscillation network 501.
As an embodiment, described energy acquisition output circuit comprises: matching network 602, rectifying and voltage-stabilizing module 603, storage battery 605 and by electric loading 606.
The output of receiving terminal LC resonant network 501 is connected to described matching network 602, matching network 602 mates with receiving terminal equivalent load impedance for making the internal resistance of receiving terminal LC resonant network 501, and export the electric current on LC resonant network 501 to rectifying and voltage-stabilizing module, for making the internal resistance of receiving terminal LC resonant network 501 mate with receiving terminal equivalent load impedance, maximize to make the received energy of receiving terminal load.Optionally, described matching network 602 can be the LC formula matching network of L-type, T-shaped, π type etc.; Also can be other type matching network such as transformer impedance translation circuit.Electric current after rectifying and voltage-stabilizing process exports storage battery 605 and load 606 respectively to, and described storage battery 605 is also powered to load 606 simultaneously.
As an embodiment, radio energy receiving equipment specifically can adopt structure as shown in Figure 7:
Being connected in parallel on by arranging a tunable capacitor in the resistance to voltage capacitance 610 of receiving terminal LC resonant network 501, controlling this tunable capacitor by motor 611, thus the tuning of self natural frequency of receiving end LC resonant network 501 that achieve a butt joint.
Particularly, described energy testing apparatus 502 comprises: punching current transformer 612 and rectifying and voltage-stabilizing module 607.
Described feedback control circuit 504 mainly comprises a control chip MCU608.
Described self-adapting resonance adjusting device 503 comprises motor drive module 609, motor 611 and the tunable capacitor in parallel with the resistance to voltage capacitance 610 in receiving terminal LC resonant network 501.
The electric current in receiving terminal LC resonant network 501 responded to by punching current transformer 612, induced current exported to rectifying and voltage-stabilizing module 607, inputs to AD (analog-to-digital conversion) module in MCU608 after rectifying and voltage-stabilizing; MCU, according to the change of current value before and after capacitance adjustment, sends conditioning signal to motor drive module 609; Motor drive module 609 controls motor 611 and rotates the capacitance regulating described tunable capacitor.As an embodiment, described motor 611 can be asynchronous machine, by rotating the capacitance regulating tunable capacitor.
Described energy acquisition output circuit comprises: matching network 602, rectifying and voltage-stabilizing module 603, charging control circuit 604, storage battery 605.
The output of receiving terminal LC resonant network 501 is connected to described matching network 602, matching network 602 mates with receiving terminal equivalent load impedance for making the internal resistance of receiving terminal LC resonant network 501, and exports the electric current on LC resonant network 501 to rectifying and voltage-stabilizing module; Electric current after rectifying and voltage-stabilizing process exports storage battery 605 and load 606 respectively to, and described storage battery 605 is powered to load 606 simultaneously.
Described charging control circuit 604 detects storage battery 605 both end voltage, and when magnitude of voltage is lower than predetermined threshold, charging control circuit 604 is opened and charged to storage battery 605, and continues to detect storage battery 605 both end voltage; When magnitude of voltage reaches storage battery 605 full piezoelectric voltage value (can realize this deterministic process by presetting a max-thresholds), charging control circuit 604 stops charging to storage battery 605.
In addition, optionally, the diode for anti-backflow is connected between described voltage stabilizing circuit 603 and load 606 and between charging control circuit 604 and load 606.
Certainly, those skilled in the art it will be appreciated that, be a kind of specific embodiment of the present invention above, the capacitance tuning on receiving terminal LC resonant network 501 can also be realized by other means, such as: can directly adopt high pressure tunable capacitor as the resistance to voltage capacitance on receiving terminal LC resonant network 501, like this without the need to a tunable capacitor in parallel, and directly regulate the resistance to voltage capacitance on this LC resonant network 501; For the tunable capacitor of parallel connection, or the high pressure tunable capacitor on receiving terminal LC resonant network 501, except the mode above by motor tuning capacitance value, other modes also can be taked tuning to realize capacitance.
In order to compare peak value as far as possible, the natural frequency of described receiving terminal LC oscillation network is regulated to adopt dichotomy, if namely described energy testing apparatus detects that the trend that the current value on LC receiving tank increases takes a turn for the worse, then the adjustment value of inductance is next time reduced by half, until peak-peak appears in the current wave on the LC receiving tank detected.This dichotomy mode can be used alone, the mode that can be also a small value with the described regulated quantity of described each increase or minimizing is above combined, namely in embodiment above, if when described energy testing apparatus detects that the trend that the current value on LC receiving tank increases takes a turn for the worse, further employing dichotomy, the adjustment value of inductance is reduced by half at every turn, thus accurate peak value location can be carried out.
In addition, as an embodiment, described self-adaptive regulating regulates the natural frequency of described receiving terminal LC oscillation network 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 and continue to detect; If not zero regulates the capacitance on receiving terminal LC resonant network increase or reduce a Δ C;
Judge the current value after capacitance adjustment whether be greater than adjustment before current value, if then continue equidirectional increase or reduce a Δ C, otherwise increase in the other direction or reduce a Δ C;
The trend increased along electric current continues to increase or reduce a Δ C, until detect that electric current increase tendency reverses; After then a Δ C being adjusted back to capacitance present value, lock this capacitance, and record this current lowest high-current value;
Continue the current value detecting receiving terminal LC resonant network, if present current value in record lowest high-current value and exceed setting threshold, then return the current value detected on receiving terminal LC resonant network, determine whether the initial step of zero.
Shown in Figure 7, the MCU adaptive control flow process of one embodiment of the invention comprises the steps:
Step 701, device power initialization;
Step 702, detects the current value of current collection, i.e. AD value be stored as D1;
Step 703, judges whether D1 equals 0, and if so, then illustrate that transmitting terminal does not normally work, receiving terminal does not produce induced oscillation, returns step 702 and continues to detect AD value; If not, then step 704 is entered;
Step 704, increases a pre-set fixed value Δ C by capacitance; Described tunable capacitor can be regulated to realize by motor in this step;
Step 705, the current AD value after Detection capacitance increases, and be stored as D2;
Step 706, judges whether D2-D1 is greater than 0, if illustrate that the adjustment of capacitance present value is in the right direction, then enters step 707; Otherwise enter step 709;
Step 707, continues capacitance to be increased a Δ C;
Step 708, detects current AD value, and is stored as D2, enter step 713;
Step 713, judges whether D2-D1 is greater than 0, if so, then current D2 is set to D1 and returns step 707, continues forward and increases 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, storage present current value is D1, enters step 715;
The object of this step is, through the judgement of step 713, after the electric capacity adjustment of step 707, should exceed maximum summit, therefore need oppositely to adjust back a Δ C to the tuning of receiving terminal LC resonant network.Certainly because after the electric capacity adjustment of step 707, in fact receiving terminal LC resonant network has been near maximum summit, therefore also can remove this step, or a fixed value less than Δ C is set to by the whole capacitance of readjustment.
Step 709, reduces a Δ C by capacitance;
Step 710, detects the value of AD and is stored as D2;
Step 711, judges whether D2-D1 is greater than 0, if then current D2 is set to D1, returns step 709; Otherwise, current D2 is arranged to D1 and enters step 712;
Step 712, capacitance present value is increased a Δ C and temporary stabilization gets off current capacitance tuning, storage present current value is D1, enters step 715;
The object of this step is, through the judgement of step 710, after the electric capacity adjustment of step 709, should exceed maximum summit, therefore need oppositely to adjust back a Δ C to the tuning of receiving terminal LC resonant network.Certainly because after the electric capacity adjustment of step 707, in fact receiving terminal LC resonant network has been near maximum summit, therefore also can remove this step, or a fixed value less than Δ C is set to by the whole capacitance of readjustment.
Step 715, detects the value of current AD and is stored as D2;
Step 716, judges that D2 and D1 difference is whether more than a predetermined percentage of D1, such as 10%, if so, then illustrates and produced severe deviations, return step 2 and re-start tuning; If not, then step 715 is returned.
In another aspect of this invention, additionally provide a kind of radio energy method of reseptance of adaptive frequency, mainly comprise as an embodiment the method:
Receiving terminal LC resonant network receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations;
Detect electric current on this receiving terminal LC oscillation network and by current value;
The natural frequency of described receiving terminal LC oscillation network is regulated according to the change of current value;
According to the current value result of variations after adjustment, regulate the natural frequency of receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes;
Export after the current acquisition process in described LC oscillation network.
In the method, described natural frequency can be regulated by regulating the capacitance on receiving terminal LC resonant network.
Equally, the mode of dichotomy can be adopted progressively to regulate the natural frequency of described receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes.
In addition, the natural frequency of described adjustment receiving terminal LC oscillation network also can take following process implementation c:
After power-up initializing, detect the current value on receiving terminal LC resonant network, determine whether zero, if so, then return and continue to detect; If not zero regulates the capacitance on receiving terminal LC resonant network increase or reduce a Δ C;
Judge the current value after capacitance adjustment whether be greater than adjustment before current value, if then continue equidirectional increase or reduce a Δ C, otherwise increase in the other direction or reduce a Δ C;
The trend increased along electric current continues to increase or reduce a Δ C, until detect that electric current increase tendency reverses; After then a Δ C being adjusted back to capacitance present value, lock this capacitance, and record this current lowest high-current value;
Continue the current value detecting receiving terminal LC resonant network, if present current value in record lowest high-current value and exceed setting threshold, then return the current value detected on receiving terminal LC resonant network, determine whether the initial step of zero.
Shown in Figure 2, be the electric energy transmission system that magnetic coupling resonant radio energy receiving equipment and Launch Equipment Shop in the embodiment of the present invention form.Specific as follows:
Transmitting terminal LC resonant network, energising power and self-resonance control circuit is included in transmitter; Energising power charges to the LC resonant network of transmitting terminal, and self-resonance control circuit, after charging, disconnects the power supply of energising power; Transmitting terminal LC resonant network is self-resonance vibration under self natural frequency, and is transferred out in the form of an electromagnetic wave by energy by the resonance coil in this transmitting terminal LC resonant network;
Receiving terminal LC resonant network and Automatic adjusument circuit is included in receiving equipment; The resonance coil of receiving terminal LC resonant network is responded to described electromagnetic wave and produces resonance oscillations; Described Automatic adjusument circuit, by regulating the natural frequency of this receiving terminal LC resonant network, makes the LC resonant network of this receiving terminal LC resonant network and described transmitting terminal produce and resonates.
In addition, described transmitting terminal LC resonant network is under self natural frequency in self-resonance oscillatory process, and when self-resonance control circuit detects that in transmitting terminal LC resonant network, energy is lower than predetermined threshold, closed power supply starts to described transmitting terminal LC resonant network charging.
The structure of a radio energy transmitter provided by the invention embodiment is shown in Figure 3, comprising: DC power supply 401, the transmitting terminal LC resonant network 402, transmitting terminal current sensing means 303, emission control module 302, the emission switch module 408 that are made up of transmitting coil and Capacitance parallel connection;
Described DC power supply 401, emission switch module 408 and transmitting terminal LC resonant network 402 are connected in series; Described transmitting terminal current sensing means 303 is for the electric current that detects on transmitting terminal LC resonant network 402 and the current value detected is transferred to emission control module 302; Described emission control module 302 disconnects for controlling emission switch or closes;
After emission switch module 408 is closed, DC power supply 401 starts to charge to described transmitting terminal LC resonant network 402, when transmitting terminal current sensing means 303 detects current value higher than predetermined current maxima, emission control module 302 controls emission switch module 408 and disconnects, and makes transmitting terminal LC resonant network 402 start self-oscillation and to unofficial biography energy; When described transmitting terminal current sensing means 303 detects that current value on described transmitting terminal LC resonant network 402 is lower than predetermined current minimum, emission control module 302 controls emission switch module 408 and closes.
Wherein, it is described when described transmitting terminal current sensing means 303 detects that current value on described transmitting terminal LC resonant network 402 is lower than predetermined current minimum; in order to protect emission switch module 408; electric current whether zero crossing can also be detected further; when current zero-crossing point, emission control module 302 controls emission switch module 408 and closes.
As an embodiment, described DC power supply 401 is induction type electricity getting device, for obtaining energy from induction on high voltage transmission line and rectifying and wave-filtering formation galvanic current potential source.
This induction type electricity getting device comprises gets energy coil, rectifying and wave-filtering, power taking power adjustments, charging and voltage stabilizing circuit, lithium battery group, and the both positive and negative polarity output of charging and voltage stabilizing circuit is connected to described transmitting terminal LC resonant network 402 and emission switch module 408.Thus, induction electricity getting device obtains energy by induction on high voltage transmission line, and converting stable voltage source to through current rectifying and wave filtering circuit, is the radiating portion energy supply of batch (-type) resonance wireless energy transform device.And the energy that induction electricity getting device obtains from high voltage transmission line by batch (-type) resonance wireless energy transform device in the mode of electromagnetic induction by wireless for the energy shaft tower that is transmitted back to, to the equipment energy supply on shaft tower.
Shown in Figure 4, as an embodiment, described transmitting terminal current sensing means 303 comprises: punching current transformer 409, rectification filtering module 403, current maxima comparator 404, current minimum comparator 405 and voltage zero-crossing comparator 407, and wherein voltage zero-crossing comparator 407 judges electric current whether zero crossing by detecting described switch module 408 both end voltage difference.Described control module is rest-set flip-flop 406.
Punching current transformer 409 induced emission end LC resonant network 402 current oscillation, the induced current produced is transferred to rectification filtering module 403, be transferred to current maxima comparator 404 and current minimum comparator 405 after rectifying and wave-filtering simultaneously, when current maxima comparator 404 judges that current value exceedes predetermined lowest high-current value, signal is sent to described rest-set flip-flop 406, rest-set flip-flop 406 is trigger switch module 408 after receiving this signal, now switch module 408 is in closed, therefore switch module 408 disconnects after receiving the triggering signal of rest-set flip-flop 406.When current minimum comparator 405 judges current value lower than predetermined minimum value, signal is sent to described voltage zero-crossing comparator 407, trigger voltage zero-crossing comparator 407 detects and the voltage difference at more described switch module 408 two ends, if described switch module 408 both end voltage difference reaches zero, then this voltage zero-crossing comparator sends signal to described rest-set flip-flop 406, rest-set flip-flop 406 trigger switch module 408, now switch module 408 is in off-state (because the internal resistance of switch module 408 is therefore under LC resonant network 402 charged state, the voltage difference at these switch module 408 two ends can not be zero), therefore after receiving the triggering signal of rest-set flip-flop 406, switch module 408 closes, DC power supply 401 starts as LC resonant network 402 charges.
Content can be found out from above, and the resolution circuitry topological structure of the embodiment of the present invention is simple, and it is convenient to install, and through-put power is large, and efficiency is high, has very strong adaptive ability.Compared with traditional Multi-Switch DC inversion control circui, decrease switching loss, and only have a switch control rule, improve fail safe and practicality, greatly reduce engineering cost.And due to batch (-type) pass can, switching frequency, well below frequency of oscillation, effectively prevent comprising of causing because switching frequency is too high: a series of difficult problems for HF switch, control chip, LC resonant network etc.Utilize transmitting coil directly to form frequency-selective network, make system shake frequency and forever shake in resonance frequency, maximizing efficiency.Its frequency self-adaption is all built with basic circuit, and logic is simple, does not have software programming, improves reliability and reaction speed, can realize the self-control under 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, transmitting coil not necessarily requires to overlap completely point-blank with the axis of the receiving coil in receiving terminal LC resonant network.Certainly in order to ensure preferably magnetic coupling, preferred emission coil and receiving coil axis as far as possible unsuitable deviation are too many; If the distance between transmitting coil and receiving coil is at 2 ~ 5 meters, the angle of receiving coil axis relative transmission coil axis can within ± 30 °.In addition, the axis of transmitting coil and both receiving coils also can parallel but certain small distance that is staggered, and the distance that staggers does not exceed transmitting coil diameter 2 times, is all generally acceptable.
The technology of the present invention radio energy-transmitting efficiency is high, and device structure is simple, does not also have too high request to the technique passing energy coil.By current experiment, as long as arrange a little coil, can realize the wireless energy transfer within the scope of 2 ~ 5 meters, efficiency of transmission can reach 40%.Therefore application of the present invention is very extensive, namely may be used for the radio energy-transmitting on power line, also may be used for the scenes such as the radio energy-transmitting of various needs, wireless power transmission, wireless charging.
Fig. 8 is an embody rule implementation of radio energy transmission system of the present invention.The transmitter of radio energy of the present invention is arranged on the tower bar of power line, and by induction type electricity getting device, from high voltage transmission line, induction obtains energy and rectifying and wave-filtering formation galvanic current potential source, powers to transmitting terminal LC resonant network.Transmitting terminal LC resonant network is vibrated by self natural frequency, intermittently converts electrical energy into electromagnetic wave outside transmission.After receiving terminal LC resonant network in receiving equipment senses this electromagnetic wave, start to vibrate thereupon, by the natural frequency of the self-adapting tuning circuit tuning receiving terminal LC resonant network of receiving equipment inside, the LC resonant network of receiving terminal LC resonant network and transmitting terminal is produced resonate, magnetic coupling is realized with this, thus the energy acceptance that transmitting terminal LC resonant network is launched is got off, realize the demand such as power supplied locally and stored energy.Due to the insulation characterisitic of air, this radio energy-transmitting mode effectively can avoid the short circuit problem in high pressure power taking process.The fields such as energy, wireless charging of getting at high voltage transmission line are with a wide range of applications.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a radio energy receiving equipment, is characterized in that, comprising: receiving terminal LC resonant network, energy testing apparatus, feedback control circuit, self-adapting resonance adjusting device, energy acquisition output circuit;
Receiving terminal LC resonant network receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations; Energy testing apparatus detects the electric current on this receiving terminal LC oscillation network and current value is exported to feedback control circuit; Feedback control circuit transmits control signal to self-adapting resonance adjusting device according to the change of current value, and self-adaptive regulating regulates the natural frequency of described receiving terminal LC oscillation network after receiving this control signal; Feedback control circuit continues the current value result of variations after according to adjustment, controls the natural frequency that self-adaptive regulating regulates receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes;
Energy acquisition output circuit exports after the current acquisition process in described LC oscillation network.
2. receiving equipment according to claim 1, is characterized in that, described energy testing apparatus comprises: punching current transformer and rectifying and voltage-stabilizing module; Described feedback control circuit is MCU; Described self-adapting resonance adjusting device comprises motor drive module, motor and the tunable capacitor with the withstand voltage Capacitance parallel connection in receiving terminal LC resonant network;
Electric current in punching current transformer induction receiving terminal LC resonant network, exports rectifying and voltage-stabilizing module to, inputs to the A/D module in MCU after rectifying and voltage-stabilizing by induced current; MCU, according to the change regulating front and back current value, sends conditioning signal to motor drive module; Motor drive module controls the capacitance that motor regulates described tunable capacitor.
3. receiving equipment according to claim 1, is characterized in that, described energy acquisition output circuit comprises: matching network, rectifying and voltage-stabilizing module, charging control circuit, storage battery;
The output of receiving terminal LC resonant network is connected to described matching network, and matching network is used for the internal resistance of receiving terminal LC resonant network is mated with receiving terminal equivalent load impedance, and exports the electric current on LC resonant network to rectifying and voltage-stabilizing module; Electric current after rectifying and voltage-stabilizing process exports storage battery and load respectively to, and described storage battery powers to the load simultaneously;
Described charging control circuit detects storage battery both end voltage, and when magnitude of voltage is lower than predetermined threshold, charging control circuit is opened to charge in batteries, and continues to detect storage battery both end voltage; When magnitude of voltage reaches the full piezoelectric voltage value of storage battery, charging control circuit stops to charge in batteries.
4. receiving equipment according to claim 3, is characterized in that, is connected to the diode for anti-backflow between described voltage stabilizing circuit and load and between charging control circuit and load.
5. receiving equipment according to claim 1, is characterized in that, described self-adaptive regulating regulates the process of the natural frequency of described receiving terminal LC oscillation network to comprise:
After power-up initializing, detect the current value on receiving terminal LC resonant network, determine whether zero, if so, then return and continue to detect; If not zero regulates the capacitance on receiving terminal LC resonant network increase or reduce a Δ C;
Judge the current value after capacitance adjustment whether be greater than adjustment before current value, if then continue equidirectional increase or reduce a Δ C, otherwise increase in the other direction or reduce a Δ C;
The trend increased along electric current continues to increase or reduce a Δ C, until detect that electric current increase tendency reverses; After then a Δ C being adjusted back to capacitance present value, lock this capacitance, and record this current lowest high-current value;
Continue the current value detecting receiving terminal LC resonant network, if present current value in record lowest high-current value and exceed setting threshold, then return the current value detected on receiving terminal LC resonant network, determine whether the initial step of zero.
6. a radio energy method of reseptance for adaptive frequency, is characterized in that, comprising:
Receiving terminal LC resonant network receives the next electromagnetic wave of transmitter transmission and produces resonance oscillations;
Detect electric current on this receiving terminal LC oscillation network and by current value;
The natural frequency of described receiving terminal LC oscillation network is regulated according to the change of current value;
According to the current value result of variations after adjustment, regulate the natural frequency of receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes;
Export after the current acquisition process in described LC oscillation network.
7. method according to claim 6, is characterized in that, regulates described natural frequency by regulating the capacitance on receiving terminal LC resonant network.
8. method according to claim 7, is characterized in that, adopts the mode of dichotomy progressively to regulate the natural frequency of described receiving terminal LC oscillation network, until the current value on LC oscillation network maximizes.
9. method according to claim 7, it is characterized in that, the process of the natural frequency of described adjustment receiving terminal LC oscillation network comprises:
After power-up initializing, detect the current value on receiving terminal LC resonant network, determine whether zero, if so, then return and continue to detect; If not zero regulates the capacitance on receiving terminal LC resonant network increase or reduce a Δ C;
Judge the current value after capacitance adjustment whether be greater than adjustment before current value, if then continue equidirectional increase or reduce a Δ C, otherwise increase in the other direction or reduce a Δ C;
The trend increased along electric current continues to increase or reduce a Δ C, until detect that electric current increase tendency reverses; After then a Δ C being adjusted back to capacitance present value, lock this capacitance, and record this current lowest high-current value;
Continue the current value detecting receiving terminal LC resonant network, if present current value in record lowest high-current value and exceed setting threshold, then return the current value detected on receiving terminal LC resonant network, determine whether the initial step of zero.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490395A (en) * | 2015-11-30 | 2016-04-13 | 无锡华润矽科微电子有限公司 | Automatically detuned receiving terminal in wireless charging and energy adjusting method |
| 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 |
| CN106602744A (en) * | 2017-01-13 | 2017-04-26 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Miniwatt middle-distance magnetic coupling wireless power transmission apparatus and tuning method thereof |
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| CN111756119A (en) * | 2019-03-27 | 2020-10-09 | 北京小米移动软件有限公司 | Method and device for improving wireless charging efficiency and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834473A (en) * | 2010-05-21 | 2010-09-15 | 西安电子科技大学 | Resonant tracking non-contact power supply device and power supply method |
| 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 |
| JP2013536671A (en) * | 2010-08-25 | 2013-09-19 | サムスン エレクトロニクス カンパニー リミテッド | Resonance impedance tracking apparatus and method for resonant power transmission system |
| CN103346624A (en) * | 2013-07-31 | 2013-10-09 | 哈尔滨工业大学 | Multi-load wireless energy transmission device capable of automatically controlling |
-
2014
- 2014-08-13 CN CN201410397198.1A patent/CN104659930B/en active Active
Patent Citations (4)
| 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 |
| CN101834473A (en) * | 2010-05-21 | 2010-09-15 | 西安电子科技大学 | Resonant tracking non-contact power supply device and power supply method |
| JP2013536671A (en) * | 2010-08-25 | 2013-09-19 | サムスン エレクトロニクス カンパニー リミテッド | Resonance impedance tracking apparatus and method for resonant power transmission system |
| CN103346624A (en) * | 2013-07-31 | 2013-10-09 | 哈尔滨工业大学 | Multi-load wireless energy transmission device capable of automatically controlling |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110785911A (en) * | 2015-10-30 | 2020-02-11 | 成都市易冲半导体有限公司 | System, apparatus and method for adaptive tuning of wireless power transmission |
| CN105490395A (en) * | 2015-11-30 | 2016-04-13 | 无锡华润矽科微电子有限公司 | Automatically detuned receiving terminal in wireless charging and energy adjusting method |
| 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 |
| CN106602744A (en) * | 2017-01-13 | 2017-04-26 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Miniwatt middle-distance magnetic coupling wireless power transmission apparatus and tuning method thereof |
| CN107093883A (en) * | 2017-06-27 | 2017-08-25 | 青岛鲁渝能源科技有限公司 | Protection circuit, radio energy transmission system and excessively stream/short-circuit protection method |
| CN111279579A (en) * | 2017-11-03 | 2020-06-12 | 喜利得股份公司 | Resonant tank circuit for transmitting electrical energy |
| CN111247713A (en) * | 2017-11-03 | 2020-06-05 | 喜利得股份公司 | Resonant circuit for transmitting electrical energy without power amplifier |
| US11735955B2 (en) | 2017-11-03 | 2023-08-22 | Hilti Aktiengesellschaft | Resonant circuit for transmitting electric energy |
| CN108282030A (en) * | 2018-01-29 | 2018-07-13 | 重庆理工大学 | A kind of adaptive wireless charging method and device |
| CN111756119A (en) * | 2019-03-27 | 2020-10-09 | 北京小米移动软件有限公司 | Method and device for improving wireless charging efficiency and electronic equipment |
| US11264824B2 (en) | 2019-03-27 | 2022-03-01 | Beijing Xiaomi Mobile Software Co., Ltd. | Method of improving wireless charging efficiency, electronic device and storage medium |
| CN110033643A (en) * | 2019-04-20 | 2019-07-19 | 南京信息工程大学 | Roadside parking position monitoring instruction device and its control method |
| CN111355289A (en) * | 2020-04-16 | 2020-06-30 | 吉林大学 | Wireless charging constant current transmitting system for mobile phone |
| CN111355289B (en) * | 2020-04-16 | 2022-05-31 | 吉林大学 | Wireless charging constant current transmitting system for mobile phone |
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