CN103312050A - Active-receiving wireless energy transmission method and device - Google Patents

Abstract

The invention provides active-receiving wireless energy transmission method and device. The active-receiving wireless energy transmission method includes that a, a transmitting terminal transmits wireless energy according to preset initial parameters; b, a receiving terminal receives the wireless energy to determine the parameters of the transmitting terminal; c, the receiving terminal computes and controls an active transmission voltage-supply circuit thereof to reach preset voltage phase conditions; d, the receiving terminal regulates the value of a resonant capacitor thereof to reach a target value of the resonant capacitor of the receiving terminal; e, the transmitting terminal senses loads to determine parameters of the receiving terminal; f, the transmitting terminal controls the value of the resonant capacitor to reach the target value of the resonant capacitor of the transmitting terminal; and g, repeating steps of b to f if the preset conditions change so as to realize dynamic control. According to the method, the optimal circuit parameters are acquired by regulating parameters of wireless energy transmission, changing position relationships between the receiving terminal and the transmitting terminal and changing the wireless energy transmission power, so that wireless energy transmission power and efficiency are improved.

Description

Active formula is initiatively accepted wireless energy transfer method and device

Technical field

The present invention relates to the energy transmission technology field, particularly a kind of active formula is initiatively accepted wireless energy transfer method and device.

Background technology

The basic physics law of wireless energy transfer is Faraday's electromagnetic induction principle.When the magnetic flux of coil inside changed, coil inside can produce induced electromotive force, and induced electromotive force is linked into and can produces induced current in closed circuit.If magnetic flux is produced by the supply electric current of another coil, just energy is passed to receiving terminal from transmitting terminal so, thereby reach wireless energy transfer.

For AC power, be subject to the impact of circuit complex impedance, electric current and voltage is homophase not often, and therefore actual transmitted power is the dot product of current phasor and voltage vector, and transmitted power P can be represented by following formula:

$P=\stackrel{\→}{U}\·\stackrel{\→}{I}=U\·I\·\cos \left(\mathrm{\θ}\right)$

Wherein,

Be voltage vector,

Be current phasor, the value of U and I difference representative voltage and current phasor, cos (θ) is the cosine value of voltage and current vector angle.

From the angle of microcosmic more, when transmitting terminal during with fixing frequency emission, can produce alternating electric field around the alternating magnetic field, this is the source of induced electromotive force.If can control the electric current of receiving terminal, so that the alternating electric field homophase that the electric current of receiving terminal can motivate with the transmitting terminal alternating magnetic field, the energy P of transmission can be expressed as:

$P=\stackrel{\→}{U}\·\stackrel{\→}{I}=U\·I.$

Wherein,

Be voltage vector,

Be current phasor, the value of U and I difference representative voltage and current phasor.

If receiving terminal is passive reception, the phase difference of voltage and electric current can't be controlled in the later stage so, and can change with the change of extraneous factor.

Summary of the invention

The present invention is intended to solve at least one of technical problem that exists in the prior art.

For this reason, one object of the present invention is to propose a kind of active formula and initiatively accepts the wireless energy transfer method.

Second purpose of the present invention is to propose active formula and initiatively accepts wireless energy transform device.

For achieving the above object, the embodiment of first aspect present invention has proposed a kind of active formula and has initiatively accepted the wireless energy transfer method, may further comprise the steps:

A, transmitting terminal are according to default initial parameter emission wireless energy;

B, receiving terminal receive described wireless energy, determine the described parameter of described transmitting terminal;

The active transmission that c, described receiving terminal calculated and controlled described receiving terminal reaches the predeterminated voltage phase condition for volt circuit;

The appearance that d, described receiving terminal are adjusted the resonant capacitance of described receiving terminal is worth to receiving terminal resonant capacitance target appearance value;

E, described transmitting terminal inductive load are determined the parameter of described receiving terminal;

The appearance value of f, transmitting terminal control resonant capacitance reaches transmitting terminal resonant capacitance target appearance value; And

G, when pre-conditioned changing, repeating step b is to step f, to realize dynamic control.

Active formula according to the embodiment of the invention is initiatively accepted the wireless energy transfer method, by adjusting the parameter of wireless energy transfer, changing the position relationship of receiving terminal and transmitting terminal and the power of wireless energy transfer changes, obtain the optimum circuit parameter, thereby improve power and the efficiency of transmission of wireless energy transfer.

In one embodiment of the invention, described receiving terminal carries out wireless telecommunications by the detection of induced electromotive force and with described transmitting terminal, determines the described parameter of described transmitting terminal.

In one embodiment of the invention, described parameter comprises service voltage frequency, phase place, amplitude and electrical parameter.

In one embodiment of the invention, described transmitting terminal carries out wireless telecommunications by the detection of induced electromotive force and with described receiving terminal, determines to connect the described parameter of described receiving end.

In one embodiment of the invention, the voltage-phase at the receiving coil two ends that described predeterminated voltage phase condition is described receiving terminal falls behind 90 ° than the voltage-phase at the transmitting coil two ends of described transmitting terminal, and this moment, transmission frequency reached maximum.

In one embodiment of the invention, active transmission comprises frequency, phase place and the amplitude of output voltage for the output parameter of volt circuit.

In one embodiment of the invention, described receiving terminal resonant capacitance target appearance value is so that the difference of the main line electric current of described receiving terminal and main line voltage-phase is 180 °.This moment, receiving terminal main line electric current reached minimum, and the power that line resistance consumes is minimum, realized that power is maximum

In one embodiment of the invention, described transmitting terminal calculates described transmitting terminal resonant capacitance target appearance value according to the main line voltage supply of described transmitting terminal circuit and the phase relation of electric current supply.

In one embodiment of the invention, described transmitting terminal resonant capacitance target appearance value is so that the main line electric current of described transmitting terminal and main line voltage homophase.This moment, transmitting terminal main line electric current reached minimum, and the power that line resistance consumes is minimum, realized that power is maximum.

In one embodiment of the invention, the described pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

The embodiment of first aspect present invention has proposed a kind of active formula and has initiatively accepted wireless energy transform device, comprise: transmitting terminal, be used for according to default initial parameter emission wireless energy, inductive load, determine the parameter of described receiving terminal, and the appearance value of control resonant capacitance reaches transmitting terminal resonant capacitance target appearance value; Described receiving terminal, be used for receiving described wireless energy, determine the described parameter of described transmitting terminal, the active transmission of calculating and control described receiving terminal reaches the predeterminated voltage phase condition for volt circuit, and the appearance of adjusting the resonant capacitance of described receiving terminal is worth to receiving terminal resonant capacitance target appearance value; Described Dynamic control module is used for transmitting terminal and receiving terminal dynamically being adjusted, to realize dynamic control when pre-conditioned changing.

Active formula according to the embodiment of the invention is initiatively accepted wireless energy transform device, by adjusting the parameter of wireless energy transfer, changing the position relationship of receiving terminal and transmitting terminal and the power of wireless energy transfer changes, obtain the optimum circuit parameter, thereby improve power and the efficiency of transmission of wireless energy transfer.

Described receiving terminal carries out wireless telecommunications by the detection of induced electromotive force and with described transmitting terminal in one embodiment of the invention, determines the described parameter of described transmitting terminal.

Described parameter comprises service voltage frequency, phase place, amplitude and electrical parameter in one embodiment of the invention.

Described transmitting terminal carries out wireless telecommunications by the detection of induced electromotive force and with described receiving terminal in one embodiment of the invention, determines to connect the described parameter of described receiving end.

The voltage-phase at the described predeterminated voltage phase condition receiving coil two ends that are described receiving terminal falls behind predetermined value than the voltage-phase at the transmitting coil two ends of described transmitting terminal in one embodiment of the invention.

The scope of described predetermined value is 0 °-180 ° in one embodiment of the invention.

Active transmission comprises frequency, phase place and the amplitude of output voltage for the output parameter of volt circuit in one embodiment of the invention.

Described receiving terminal resonant capacitance target appearance value is so that the difference of the main line electric current of described receiving terminal and main line voltage-phase is 180 ° in one embodiment of the invention.

Described transmitting terminal calculates described transmitting terminal resonant capacitance target appearance value according to the main line voltage supply of described transmitting terminal circuit and the phase relation of electric current supply in one embodiment of the invention.

Described transmitting terminal resonant capacitance target appearance value is so that the main line electric current of described transmitting terminal and main line voltage homophase in one embodiment of the invention.

The described pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal in one embodiment of the invention.

Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.

Description of drawings

Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:

Fig. 1 is the flow chart of initiatively accepting the wireless energy transfer method according to the active formula of the embodiment of the invention;

Fig. 2 is the essential structure structural representation of initiatively accepting wireless energy transfer according to the active formula of the embodiment of the invention;

Fig. 3 is according to the energy transfer element mutual inductor voltage supply of the embodiment of the invention and the principle schematic of transmitted power relation derivation;

Fig. 4 is the graph of a relation according to the transmitting power of the matlab emulation of the embodiment of the invention and received power and mutual inductor voltage supply phase place;

Fig. 5 is the configuration schematic diagram according to the alternating current circuit of the embodiment of the invention;

Fig. 6 is the electric current and voltage polar plot according to the transmitting terminal of the embodiment of the invention;

Fig. 7 is the electric current and voltage polar plot according to the receiving terminal of the embodiment of the invention; With

Fig. 8 initiatively accepts the wireless energy transform device structured flowchart according to the active formula of the embodiment of the invention.

Embodiment

The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.

Initiatively accept the wireless energy transfer method below with reference to Fig. 1 description according to the active formula of the embodiment of the invention, may further comprise the steps:

Step a: transmitting terminal is launched wireless energy according to default initial parameter.

Wherein, parameter comprises service voltage frequency, phase place, amplitude and electrical parameter.

Step b: receiving terminal receives wireless energy, determines the parameter of transmitting terminal.

Wherein, receiving terminal carries out wireless telecommunications by the detection of induced electromotive force and with transmitting terminal, determines the parameter of transmitting terminal, and active transmission comprises frequency, phase place and the amplitude of output voltage for the output parameter of volt circuit.

Step c: receiving terminal calculates and the active transmission of control receiving terminal reaches the predeterminated voltage phase condition for volt circuit.

Wherein, the predeterminated voltage phase condition is that the voltage-phase at receiving terminal receiving coil two ends is than the backward predetermined value of voltage-phase at transmitting terminal transmitting coil two ends, the scope of this predetermined value is 0 °-180 °, and when falling behind 90 °, control phase is poor, and can to change through-put power during for other angles the highest.

Steps d: the appearance that receiving terminal is adjusted the receiving terminal resonant capacitance according to line parameter circuit value is worth to receiving terminal target appearance value.Wherein, receiving terminal target appearance value is so that the difference of receiving terminal main line electric current and main line voltage-phase is 180 °.

Step e: the transmitting terminal inductive load, determine the parameter of receiving terminal, and calculate the target appearance value of resonant capacitance.

Wherein, transmitting terminal carries out the parameter that receiving terminal is determined in wireless telecommunications by the detection of induced electromotive force and with receiving terminal.Transmitting terminal calculates the target appearance value of resonant capacitance according to the main line voltage supply of transmitting terminal circuit and the phase relation of electric current supply.

Step f: the appearance value of transmitting terminal control resonant capacitance reaches transmitting terminal target appearance value.Wherein, transmitting terminal target appearance value is so that transmitting terminal main line electric current and main line voltage homophase.

Step g: when pre-conditioned changing, repeating step b is to step f, to realize dynamic control.

Wherein, the pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

In one embodiment of the invention, active transmission for volt circuit by the control of inverter being realized the control to output parameter.Active transmission is superimposed to active transmission the secondary transformer winding of receiving terminal circuit for the output voltage of volt circuit for volt circuit, realize that active transmission supplies the voltage of volt circuit in the access of receiving terminal circuit.

The below is elaborated to this method for example, is understandable that, following explanation is not limited to this according to embodiments of the invention only for illustrative purposes.

The transmitting terminal of wireless energy transfer is controlled end, comprises micro-control unit (MCU), and MCU can control frequency, phase place, amplitude, the controlled capacitance appearance value of receiving circuit, the inductance value of controlled inductance and the resistance value of circuit auxiliary resistance of alternation supply power voltage.

This method is introduced active receiving terminal, the electric current of control receiving terminal initiatively, thus solve the transmitted power problem.Receiving terminal can be controlled the service voltage of active transmission, the controlled capacitance appearance value of receiving circuit, the inductance value of controlled inductance and the resistance value of circuit auxiliary resistance etc. with micro-control unit MCU.The receiving terminal of wireless energy transmission equipment is introduced additional electromotive force by active transmission for volt circuit, and wherein, active transmission is controlled by the micro-control unit (MCU) of receiving terminal-receiving end control circuit for volt circuit.Active transmission for volt circuit by the control of inverter being realized the control to output parameter.Active transmission is superimposed to active transmission the secondary transformer winding of receiving terminal circuit for the output voltage of volt circuit for volt circuit, realize that active transmission supplies the voltage of volt circuit in the access of receiving terminal circuit.

The MCU of receiving terminal and the MCU of transmitting terminal can carry out wireless signal communication.Be added with the phase acquisition transducer in the receiving terminal circuit, receiving-end voltage and current phase signal are passed to MCU.

Wherein, the resonant capacitance of transmitting terminal and receiving terminal is tunable capacitor and is subjected to separately that MCU controls, and is used for realizing the reactance imaginary part (Z=Z on circuit main line _R+ iZ _i) minimize, in the situation that the constant main line current effective value that makes of transmitting coil current-voltage characteristic minimizes, thereby reduce the resistance consumption of circuit, improve transmission efficiency.

The idiographic flow of the present embodiment is as follows:

Step S110: transmitting terminal is according to default service voltage frequency, phase place, amplitude and electrical parameter emission wireless energy.

Step S120: receiving terminal receives wireless energy, and the MCU of receiving terminal and the MCU of transmitting terminal can carry out wireless signal communication.The phase acquisition transducer passes to MCU with receiving-end voltage and current phase signal, MCU by the signal of collecting determine transmitting terminal the parameter information such as amplitude, phase place, frequency of induction coil two ends electromotive force.

Step S130:MCU calculates required active transmission for the supply power voltage of volt circuit, the dynamic acquisition information needed, and carry out closed-loop control, until so that the phase place of the induction coil both end voltage of receiving terminal falls behind 90 ° than the voltage-phase that transmitting terminal induction coil connects end, this moment, transmitted power was maximum.MCU determines that active transmission is for frequency, phase place and the amplitude of the output voltage of volt circuit.

Transmitted power is shown below:

Wherein M is coil mutual inductance, u _xBe receiving terminal coil two ends electromotive force amplitude, u ₁Be transmitting terminal coil two ends electromotive force amplitude,, the angular frequency of ω for transmitting, L ₁Be transmitting terminal coil inductance, L ₂Be the receiving terminal coil inductance,

Be the receiving terminal phase angle more backward than transmitting terminal.When the voltage-phase that can find out control receiving terminal receiving coil two ends from formula fell behind 90 ° than the voltage-phase at transmitting terminal transmitting coil two ends, transmitted power P was maximum, and this mode can not brought the decay of efficient.

In addition, transmitted power P is inversely proportional to transmitting angular frequency, but owing to reducing ω the dividing potential drop of induction coil is reduced, so the dividing potential drop of line resistance can increase, so that transmission efficiency reduces; And in the situation that service voltage is constant, u ₁Can reduce, be unfavorable for the increase of transmitted power, so the requirement that needs in the method implementation procedure to consider transmission efficiency and transmitted power designs transmitting angular frequency.

Step S140: the appearance that receiving terminal is adjusted the receiving terminal resonant capacitance according to line parameter circuit value is worth to receiving terminal target appearance value.

Receiving terminal target appearance value is so that the difference of receiving terminal main line electric current and main line voltage-phase is 180 °.The appearance value of control receiving terminal resonant capacitance, so that transmitting terminal circuit main line electric current and main line voltage inversion, this moment, receiving terminal main line electric current reached minimum, the power that line resistance consumes is also minimum, realizes the maximization of power, and the decay that can not bring power.

Step S150: the parameter of transmitting terminal inductive load and definite receiving terminal, and according to the main line voltage supply of transmitting terminal circuit and the phase relation of electric current supply, calculate the target appearance value of resonant capacitance.

Wherein, transmitting terminal carries out the parameter that receiving terminal is determined in wireless telecommunications by the detection of induced electromotive force and with receiving terminal.

Step S160: the appearance value of transmitting terminal control resonant capacitance reaches transmitting terminal target appearance value.

Transmitting terminal target appearance value is so that transmitting terminal main line electric current and main line voltage homophase.The appearance value of control transmitting terminal resonant capacitance, so that transmitting terminal circuit main line electric current and main line voltage homophase, this moment, transmitting terminal main line electric current reached minimum, the power that line resistance consumes is also minimum, realizes the maximization of power, and the decay that brings power.

Step S170: when pre-conditioned changing, repeating step S120 is to step step S160:, to realize dynamic control.Wherein, the pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

Among the present invention, transmitting terminal circuit and receiving terminal circuit are alternating current circuit, for certain power transmission, electric current at the induction coil place is not identical with voltage-phase, if therefore there is not the existence of resonant capacitor, the electric current on main line can be larger than the ratio of transmitted power and main line voltage, and the power consumption that is wasted on the line resistance also can increase, and when high power transmission, electric current is often very large, therefore the line resistance power consumption also can be very large, and after adding resonant capacitance, can make circuit totally present resistance characteristic, complex impedance is zero, thereby make electric current and voltage homophase, reduced the main line electric current, improved line efficiency.And the reactance of alternating current circuit with frequency and receiving terminal initiatively the variation of the phase place, amplitude etc. of voltage supply change, therefore need dynamically to adjust as required the appearance value of resonant capacitance, so among the present invention, all adopt controllable resonant electric capacity at transmitting terminal and receiving terminal, MCU calculates required appearance value according to demand, and dynamically change capacitance, so that system's transmission efficiency optimization.

The course of work and control strategy foundation below in conjunction with a specific embodiment process in detail.Sketch shown in Figure 2 is according to the essential structure of the system of the embodiment of the invention, is understandable that, the described system of Fig. 2 is not limited to this according to embodiments of the invention only for illustrative purposes.Each labeled elements is as follows among Fig. 2:

1 is transmitting terminal power supply input;

2 is the transmitting terminal inverter, can change frequency, by 3 controls;

3 is transmitting terminal microcontroller (MCU), controls the frequency of transmitting terminal inverter 2, can also control the appearance value of transmitting terminal controllable resonant electric capacity 4;

4 is transmitting terminal controllable resonant electric capacity, is used for control circuit resonance;

5 is transmitting terminal induction coil both end voltage value acquisition module, is used for gathering the magnitude of voltage U1 at transmitting terminal induction coil two ends;

6 is the transmitting terminal induction coil, is the wireless energy radiated element;

7 is the receiving terminal induction coil, is the wireless energy receiving element;

8 is receiving terminal induction coil both end voltage value acquisition module, is used for gathering the magnitude of voltage U2 at receiving terminal induction coil two ends;

9 is rectification circuit, is used for alternating current is converted to direct current;

10 is filter circuit;

11 is storage battery;

12 is the receiving terminal inverter, can change frequency, by 13 controls;

13 is transmitting terminal microcontroller (MCU), controls the frequency of receiving terminal inverter 12, can also control the appearance value of transmitting terminal controllable resonant electric capacity 4;

14 is initiatively voltage supply transformer of key element of the present invention-receiving terminal circuit;

15 is initiatively voltage supply transformer secondary output coil of key element of the present invention-receiving terminal circuit.

Wherein, the working law of transmitting terminal induction coil 6 and receiving terminal induction coil 7 as shown in Figure 3, the coil above among Fig. 3 is transmitting terminal induction coil 6, following coil is receiving terminal induction coil 7.Symbol and implication are as shown in table 1:

φ ₁₁Be the magnetic flux of transmitting terminal coil current in the generation of transmitting terminal coil place

φ ₁₂Be the magnetic flux of transmitting terminal coil current in the generation of receiving terminal coil place

φ ₂₁Be the magnetic flux of receiving terminal coil current in the generation of transmitting terminal coil place

φ ₂₂Be the magnetic flux of receiving terminal coil current in the generation of receiving terminal coil place

ε ₁₁Self induction electromotive force for transmitting terminal

ε ₁₂Be the induced electromotive force of transmitting terminal in the receiving terminal generation

ε ₂₁Be the induced electromotive force of receiving terminal in the transmitting terminal generation

ε ₂₂Self induction electromotive force for receiving terminal

k ₁₂For producing magnetic flux, transmitting terminal passes receiving terminal coil ratio

k ₂₁For producing magnetic flux, receiving terminal passes transmitting terminal coil ratio

M is for being transmitting terminal and receiving terminal coil mutual inductance

L ₁Be the transmitting terminal self-induction of loop

L ₂Be the receiving terminal self-induction of loop

Table 1

And following relation is arranged:

φ ₁₁＝L ₁I ₁

φ ₁₂=k _l2L _lI ₁=MI ₁

φ ₂₂=L ₂I ₂

φ ₂₁=k ₂₁L ₂I ₂=MI ₂

By calculating:

${\mathrm{\ϵ}}_{12}=-\frac{d{\mathrm{\φ}}_{12}}{\mathrm{dt}}=-M\frac{{\mathrm{dI}}_1}{\mathrm{dt}}$

${\mathrm{\&epsiv;}}_{21}=-\frac{d{\mathrm{\&phi;}}_{21}}{\mathrm{dt}}=-\mathrm{<figure-callout\; id="2"\; label="M\; dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}\frac{{\mathrm{dI}}_{}}{}\frac{{}_2}{\mathrm{dt}}$

${\mathrm{\&epsiv;}}_{11}=-L_1\frac{{\mathrm{dI}}_1}{\mathrm{dt}}$

${\mathrm{\&epsiv;}}_{22}=-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\frac{{\mathrm{<figure-callout\; id="2"\; label="dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">dI</figure-callout>}}_2}{\mathrm{dt}}$

$u_1=-({\mathrm{\&epsiv;}}_{11}+{\mathrm{\&epsiv;}}_{21})=L_1\frac{{\mathrm{dI}}_1}{\mathrm{dt}}+\mathrm{<figure-callout\; id="2"\; label="M\; dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}\frac{{\mathrm{dI}}_{}}{}\frac{{}_2}{\mathrm{dt}}$

${\mathrm{<figure-callout\; id="2"\; label="u"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">u</figure-callout>}}_2=-({\mathrm{\&epsiv;}}_{22}+{\mathrm{\&epsiv;}}_{12})={\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\frac{{\mathrm{<figure-callout\; id="2"\; label="dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">dI</figure-callout>}}_2}{\mathrm{dt}}+M\frac{{\mathrm{dI}}_1}{\mathrm{dt}}$

Further obtain electric current according to calculating magnetic flux and voltage:

$I_1=\&Integral;\frac{-\mathrm{<figure-callout\; id="2"\; label="M\; u"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}{u}_{}{}_2+L_2{u}_1}{L_1{L}_2-{\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}}^2}\&CenterDot;\mathrm{dt}$

$I_2=\&Integral;\frac{-M{u}_1+L_1{u}_2}{L_1{L}_2-{\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}}^2}\&CenterDot;\mathrm{dt}$

Suppose this moment:

u ₁=U ₀·sin(ωt)

Because constant term is DC component, can decay to 0 because of line resistance, therefore cast out constant term, carry out integration, obtain following result:

Transmitting power is expressed as:

Received power is expressed as:

Wherein, power is on the occasion of the expression consumed power, and negative value represents absorbed power.

Can find out that from top expression formula the voltage-phase of working as receiving terminal coil two ends is than 90 ° of transmitting terminal coil both end voltage phase lags, namely

The time, transmitted power reaches maximum.Shown in Figure 4 is the power output of transmitting terminal coil and receiving terminal coil and the relation between the phase difference, transverse axis represents phase difference, the longitudinal axis represents power output, two curves represent respectively transmitting terminal coil and receiving terminal, from figure, can obtain in the receiving terminal phase place than transmitting terminal phase lag 0.5*pi, namely

The time, it is maximum that transmitted power reaches.

The control method of controlled capacitance 4 as shown in Figure 5.For alternating current circuit, the phase relation of electric current and voltage often is not homophase in the circuit, transmitting terminal induction coil 6 and receiving terminal induction coil 7 are inductive element, the phase place of its electric current can be ahead of the phase place of voltage, C is controlled capacitance among Fig. 5, R is the resistance of circuit and inverter, and L is the inductance value of induction coil, branch current I in the figure mark.Relation according to alternating current circuit electric current and inductance can obtain phase diagram shown in Figure 6, the longitudinal axis represents electric current I among the figure, and transverse axis represents resistance R, as can be drawn from Figure 6, add suitable capacity cell and can make the main line electric current reach minimum value, at this moment main line voltage and electric current homophase.Under different applied environments, the phase difference of electric current and voltage can change on the induction coil, and the appearance value of required resonant capacitance also can change, and therefore needs dynamic this parameter of adjusting.The present invention utilizes main line voltage-phase and main line current phase to be detection limit, the appearance value of control controlled capacitance, so that main line electric current and voltage homophase, it is final so that the efficient of system reaches maximum, introducing the electric capacity front and back, the electric current of induction coil and voltage can not be affected, so this mode can not have influence on the power of transmission.

For receiving terminal, induction coil is not power output, but absorbed power, so the phase difference of electric current and voltage is greater than 90 °, and dot product result absorbs energy less than zero.As shown in Figure 7, behind the adding resonant capacitance, when the voltage that obtains and electric current were anti-phase, the main line electric current was minimum, and line resistance consumption is also minimum.So need to be controlled at phase difference at receiving terminal detection limit electric current and voltage is 180 °.

The below introduces the present invention for transmitting terminal and receiving terminal induction coil both end voltage

The control of phase place.Transmitting terminal is by the voltage of inverter control transmitting terminal

Phase place, receiving terminal provides controlled alternating-current voltage source by active transmission for volt circuit, and by transformer original paper 14,15 this controllable voltage is incorporated in the middle of the receiving terminal circuit, the induction coil both end voltage of transmitting terminal and receiving terminal all collects separately in the microcontroller, and by wireless telecommunications this information of voltage is sent to the other side, be used for the closed loop phase control.

Active formula according to the embodiment of the invention is initiatively accepted the wireless energy transfer method, all adopt controllable resonant electric capacity at transmitting terminal and receiving terminal, by " introducing receiving terminal initiatively powers ", voltage, frequency, the phase place of power supply introduced in closed-loop control, and closed-loop control transmitting terminal and receiving terminal resonant capacitance calculate required appearance value according to demand, and dynamically change capacitance, quick real-time control desired parameters, thereby the power of active realization wireless power transmission, efficiency optimization.

The below describes according to Fig. 8 and initiatively accepts wireless energy transform device 100 according to the active formula of the embodiment of the invention, comprises transmitting terminal 110, receiving terminal 120 and Dynamic control module 130.

Wherein, transmitting terminal 110 is used for according to default initial parameter emission wireless energy, and inductive load determine the parameter of receiving terminal 120, and the appearance value of control resonant capacitance reaches transmitting terminal resonant capacitance target appearance value;

Receiving terminal 120 is used for receiving wireless energy, determine the parameter of transmitting terminal 110, the active transmission of calculating and control receiving terminal 120 reaches the predeterminated voltage phase condition for volt circuit, and the appearance of the resonant capacitance of adjustment receiving terminal 120 is worth to receiving terminal resonant capacitance target appearance value;

Dynamic control module 130 is used for transmitting terminal 110 and receiving terminal 120 dynamically being adjusted, to realize dynamic control when pre-conditioned changing.

In one embodiment of the invention, receiving terminal 120 carries out wireless telecommunications by the detection of induced electromotive force and with transmitting terminal 110, determines the parameter of transmitting terminal 110.Transmitting terminal 110 carries out wireless telecommunications by the detection of induced electromotive force and with receiving terminal 120, determines the parameter of receiving terminal 120.Parameter comprises service voltage frequency, phase place, amplitude and electrical parameter.The predeterminated voltage phase condition is that the voltage-phase at the receiving coil two ends of receiving terminal 120 falls behind predetermined value than the voltage-phase at the transmitting coil two ends of transmitting terminal 110, the scope of this predetermined value is 0 °-180 °, when falling behind 90 °, control phase is poor, and can to change through-put power during for other angles the highest.Active transmission comprises frequency, phase place and the amplitude of output voltage for the output parameter of volt circuit.Receiving terminal resonant capacitance target appearance value is so that the difference of the main line electric current of receiving terminal 120 and main line voltage-phase is 180 °.Transmitting terminal 110 calculates transmitting terminal resonant capacitance target appearance value according to the main line voltage supply of transmitting terminal 110 circuit and the phase relation of electric current supply.Transmitting terminal resonant capacitance target appearance value is so that the main line electric current of transmitting terminal 110 and main line voltage homophase.The pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

The below is elaborated to this device for example, is understandable that, following explanation is not limited to this according to embodiments of the invention only for illustrative purposes.

The transmitting terminal 110 of wireless energy transfer is controlled end, comprise micro-control unit (MCU), MCU can control frequency, phase place, amplitude, the controlled capacitance appearance value of receiving circuit, the inductance value of controlled inductance and the resistance value of circuit auxiliary resistance of alternation supply power voltage.

This device is introduced active receiving terminal 120, the electric current of control receiving terminal 120 initiatively, thus solve the transmitted power problem.Receiving terminal 120 can be controlled the service voltage of active transmission, the controlled capacitance appearance value of receiving circuit, the inductance value of controlled inductance and the resistance value of circuit auxiliary resistance etc. with micro-control unit MCU.The receiving terminal 120 of wireless energy transmission equipment is introduced additional electromotive force by active transmission for volt circuit, and wherein, active transmission is controlled by the micro-control unit (MCU) of receiving terminal 120-receiving end control circuit for volt circuit.Active transmission for volt circuit by the control of inverter being realized the control to output parameter.Active transmission is superimposed to active transmission the secondary transformer winding of receiving terminal 120 circuit for the output voltage of volt circuit for volt circuit, realize that active transmission supplies the voltage of volt circuit in the access of receiving terminal 120 circuit.

The MCU of the MCU of receiving terminal 120 and transmitting terminal 110 can carry out wireless signal communication.Be added with the phase acquisition transducer in receiving terminal 120 circuit, receiving-end voltage and current phase signal are passed to MCU.

Wherein, the resonant capacitance of transmitting terminal 110 and receiving terminal 120 is tunable capacitor and is subjected to separately that MCU controls, and is used for realizing the reactance imaginary part (Z=Z on circuit main line _R+ iZ _i) minimize, in the situation that the constant main line current effective value that makes of transmitting coil current-voltage characteristic minimizes, thereby reduce the resistance consumption of circuit, improve transmission efficiency.

The idiographic flow of the present embodiment is as follows:

Step S210: transmitting terminal 110 is according to default service voltage frequency, phase place, amplitude and electrical parameter emission wireless energy.

Step S220: receiving terminal 120 receives wireless energy, and the MCU of the MCU of receiving terminal 120 and transmitting terminal 110 can carry out wireless signal communication.The phase acquisition transducer passes to MCU with receiving-end voltage and current phase signal, MCU by the signal of collecting determine transmitting terminal 110 the parameter information such as amplitude, phase place, frequency of induction coil two ends electromotive force.

Step S230:MCU calculates required active transmission for the supply power voltage of volt circuit, the dynamic acquisition information needed, and carry out closed-loop control, until so that the phase place of the induction coil both end voltage of receiving terminal 120 falls behind 90 ° than the voltage-phase that transmitting terminal 110 induction coils connect end, this moment, transmitted power was maximum.MCU determines that active transmission is for frequency, phase place and the amplitude of the output voltage of volt circuit.

Transmitted power is shown below:

Wherein M is coil mutual inductance, u _xBe receiving terminal 120 coil two ends electromotive force amplitudes, u ₁Be transmitting terminal 110 coil two ends electromotive force amplitudes,, the angular frequency of ω for transmitting, L ₁Be transmitting terminal 110 coil inductances, L ₂Be receiving terminal 120 coil inductances,

Be the phase angle of receiving terminal 120 than transmitting terminal 110 backwardnesss.When the voltage-phase that can find out control receiving terminal 120 receiving coil two ends from formula fell behind 90 ° than the voltage-phase at transmitting terminal 110 transmitting coil two ends, transmitted power P was maximum, and this mode can not brought the decay of efficient.

In addition, transmitted power P is inversely proportional to transmitting angular frequency, but owing to reducing ω the dividing potential drop of induction coil is reduced, so the dividing potential drop of line resistance can increase, so that transmission efficiency reduces; And in the situation that service voltage is constant, u ₁Can reduce, be unfavorable for the increase of transmitted power, so the requirement that needs in the method implementation procedure to consider transmission efficiency and transmitted power designs transmitting angular frequency.

Step S240: the appearance that receiving terminal 120 is adjusted the receiving terminal resonant capacitance according to line parameter circuit value is worth to receiving terminal resonant capacitance target appearance value.

Receiving terminal 120 target appearance values are so that the difference of receiving terminal 120 main line electric currents and main line voltage-phase is 180 °.The appearance value of control receiving terminal resonant capacitance, so that transmitting terminal 110 circuit main line electric currents and main line voltage inversion, this moment, receiving terminal 120 main line electric currents reached minimum, and the power that line resistance consumes is also minimum, realize the maximization of power, and the decay that can not bring power.

Step S250: the parameter of transmitting terminal 110 inductive loads and definite receiving terminal 120, and according to the main line voltage supply of transmitting terminal 110 circuit and the phase relation of electric current supply, calculate the target appearance value of resonant capacitance.

Wherein, transmitting terminal 110 carries out the parameter that receiving terminal 120 is determined in wireless telecommunications by the detection of induced electromotive force and with receiving terminal 120.

Step S260: the appearance value of transmitting terminal 110 control resonant capacitances reaches transmitting terminal target appearance value.

Transmitting terminal target appearance value is so that transmitting terminal main line electric current and main line voltage homophase.The appearance value of control transmitting terminal resonant capacitance, so that transmitting terminal circuit main line electric current and main line voltage homophase, this moment, transmitting terminal 110 main line electric currents reached minimum, the power that line resistance consumes is also minimum, realizes the maximization of power, and the decay that brings power.

Step S270: when pre-conditioned changing, Dynamic control module 130 control transmitting terminal 110 and receiving terminals 120, repeating step S220 is to step S260, to realize dynamic control.Wherein, the pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

Among the present invention, transmitting terminal circuit and receiving terminal circuit are alternating current circuit, for certain power transmission, electric current at the induction coil place is not identical with voltage-phase, if therefore there is not the existence of resonant capacitor, the electric current on main line can be larger than the ratio of transmitted power and main line voltage, and the power consumption that is wasted on the line resistance also can increase, and when high power transmission, electric current is often very large, therefore the line resistance power consumption also can be very large, and after adding resonant capacitance, can make circuit totally present resistance characteristic, complex impedance is zero, thereby make electric current and voltage homophase, reduced the main line electric current, improved line efficiency.And the reactance of alternating current circuit with frequency and receiving terminal 120 initiatively the variation of the phase place, amplitude etc. of voltage supply change, therefore need dynamically to adjust as required the appearance value of resonant capacitance, so among the present invention, all adopt controllable resonant electric capacity at transmitting terminal 110 and receiving terminal 120, MCU calculates required appearance value according to demand, and dynamically change capacitance, so that system's transmission efficiency optimization.

Describe the course of work and the control strategy foundation of this device in detail below in conjunction with a specific embodiment.Sketch shown in Figure 2 is according to the essential structure of the system of the embodiment of the invention, is understandable that, the described system of Fig. 2 is not limited to this according to embodiments of the invention only for illustrative purposes.Each labeled elements is as follows among Fig. 2:

1 is transmitting terminal 110 power supply inputs;

2 is transmitting terminal 110 inverters, can change frequency, by 3 controls;

3 is transmitting terminal 110 microcontrollers (MCU), controls the frequency of transmitting terminal 110 inverters 2, can also control the appearance value of transmitting terminal 110 controllable resonant electric capacity 4;

4 is transmitting terminal 110 controllable resonant electric capacity, is used for control circuit resonance;

5 is transmitting terminal 110 induction coil both end voltage value acquisition modules, is used for gathering the magnitude of voltage U1 at transmitting terminal 110 induction coil two ends;

6 is transmitting terminal 110 induction coils, is the wireless energy radiated element;

7 is receiving terminal 120 induction coils, is the wireless energy receiving element;

8 is receiving terminal 120 induction coil both end voltage value acquisition modules, is used for gathering the magnitude of voltage U2 at receiving terminal 120 induction coil two ends;

9 is rectification circuit, is used for alternating current is converted to direct current;

10 is filter circuit;

11 is storage battery;

12 is receiving terminal 120 inverters, can change frequency, by 13 controls;

13 is transmitting terminal 110 microcontrollers (MCU), controls the frequency of receiving terminal 120 inverters 12, can also control the appearance value of transmitting terminal 110 controllable resonant electric capacity 4;

14 is initiatively voltage supply transformer of key element-receiving terminal 120 circuits of the present invention;

15 is initiatively voltage supply transformer secondary output coils of key element-receiving terminal 120 circuits of the present invention.

Wherein, the working law of transmitting terminal 110 induction coils 6 and receiving terminal 120 induction coils 7 as shown in Figure 3, the coil above among Fig. 3 is transmitting terminal 110 induction coils 6, following coil is receiving terminal 120 induction coils 7.Symbol and implication are as shown in table 1:

And following relation is arranged:

φ ₁₁＝L ₁I ₁

φ ₁₂=k ₁₂L _lI ₁=MI ₁

φ ₂₂=L ₂I ₂

φ ₂₁=k ₂₁L ₂I ₂=MI ₂

By calculating:

${\mathrm{\&epsiv;}}_{12}=-\frac{d{\mathrm{\&phi;}}_{12}}{\mathrm{dt}}=-M\frac{{\mathrm{dI}}_1}{\mathrm{dt}}$

${\mathrm{\&epsiv;}}_{21}=-\frac{d{\mathrm{\&phi;}}_{21}}{\mathrm{dt}}=-\mathrm{<figure-callout\; id="2"\; label="M\; dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}\frac{{\mathrm{dI}}_{}}{}\frac{{}_2}{\mathrm{dt}}$

${\mathrm{\&epsiv;}}_{11}=-L_1\frac{{\mathrm{dI}}_1}{\mathrm{dt}}$

${\mathrm{\&epsiv;}}_{22}=-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\frac{{\mathrm{<figure-callout\; id="2"\; label="dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">dI</figure-callout>}}_2}{\mathrm{dt}}$

$u_1=-({\mathrm{\&epsiv;}}_{11}+{\mathrm{\&epsiv;}}_{21})=L_1\frac{{\mathrm{dI}}_1}{\mathrm{dt}}+\mathrm{<figure-callout\; id="2"\; label="M\; dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}\frac{{\mathrm{dI}}_{}}{}\frac{{}_2}{\mathrm{dt}}$

${\mathrm{<figure-callout\; id="2"\; label="u"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">u</figure-callout>}}_2=-({\mathrm{\&epsiv;}}_{22}+{\mathrm{\&epsiv;}}_{12})={\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">L</figure-callout>}}_2\frac{{\mathrm{<figure-callout\; id="2"\; label="dI"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">dI</figure-callout>}}_2}{\mathrm{dt}}+M\frac{{\mathrm{dI}}_1}{\mathrm{dt}}$

Further obtain electric current according to calculating magnetic flux and voltage:

$I_1=\&Integral;\frac{-\mathrm{<figure-callout\; id="2"\; label="M\; u"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}{u}_{}{}_2+L_2{u}_1}{L_1{L}_2-{\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}}^2}\&CenterDot;\mathrm{dt}$

$I_2=\&Integral;\frac{-M{u}_1+L_1{u}_2}{L_1{L}_2-{\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="HDA00003348226200021.png"\; state="\{\{state\}\}">M</figure-callout>}}^2}\&CenterDot;\mathrm{dt}$

Suppose this moment:

u ₁=U ₀·sin(ωt)

Because constant term is DC component, can decay to 0 because of line resistance, therefore cast out constant term, carry out integration, obtain following result:

Transmitting power is expressed as:

Received power is expressed as:

Wherein, power is on the occasion of the expression consumed power, and negative value represents absorbed power.

Can find out that from top expression formula the voltage-phase of working as receiving terminal 120 coil two ends is than 90 ° of transmitting terminal 110 coil both end voltage phase lags, namely

The time, transmitted power reaches maximum.Shown in Figure 4 is transmitting terminal 110 coils and the power output of receiving terminal 120 coils and the relation between the phase difference, transverse axis represents phase difference, the longitudinal axis represents power output, two curves represent respectively transmitting terminal 110 coils and receiving terminal 120, from figure, can obtain in receiving terminal 120 phase places than transmitting terminal 110 phase lag 0.5*pi, namely

The time, it is maximum that transmitted power reaches.

The control method of controlled capacitance 4 as shown in Figure 5.For alternating current circuit, the phase relation of electric current and voltage often is not homophase in the circuit, transmitting terminal 110 induction coils 6 and receiving terminal 120 induction coils 7 are inductive element, the phase place of its electric current can be ahead of the phase place of voltage, C is controlled capacitance among Fig. 5, R is the resistance of circuit and inverter, and L is the inductance value of induction coil, branch current I in the figure mark.Relation according to alternating current circuit electric current and inductance can obtain phase diagram shown in Figure 6, the longitudinal axis represents electric current I among the figure, and transverse axis represents resistance R, as can be drawn from Figure 6, add suitable capacity cell and can make the main line electric current reach minimum value, at this moment main line voltage and electric current homophase.Under different applied environments, the phase difference of electric current and voltage can change on the induction coil, and the appearance value of required resonant capacitance also can change, and therefore needs dynamic this parameter of adjusting.The present invention utilizes main line voltage-phase and main line current phase to be detection limit, the appearance value of control controlled capacitance, so that main line electric current and voltage homophase, it is final so that the efficient of system reaches maximum, introducing the electric capacity front and back, the electric current of induction coil and voltage can not be affected, so this mode can not have influence on the power of transmission.

For receiving terminal 120, induction coil is not power output, but absorbed power, so the phase difference of electric current and voltage is greater than 90 °, and dot product result absorbs energy less than zero.As shown in Figure 7, behind the adding resonant capacitance, when the voltage that obtains and electric current were anti-phase, the main line electric current was minimum, and line resistance consumption is also minimum.So need to be controlled at phase difference at receiving terminal 120 detection limit electric currents and voltage is 180 °.

The below introduces the present invention for transmitting terminal 110 and receiving terminal 120 induction coil both end voltage

The control of phase place.Transmitting terminal 110 is by the voltage of inverter control transmitting terminal 110

Phase place, receiving terminal 120 provides controlled alternating-current voltage source by active transmission for volt circuit, and by transformer original paper 14,15 this controllable voltage is incorporated in the middle of receiving terminal 120 circuits, the induction coil both end voltage of transmitting terminal 110 and receiving terminal 120 all collects separately in the microcontroller, and by wireless telecommunications this information of voltage is sent to the other side, be used for the closed loop phase control.

Active formula according to the embodiment of the invention is initiatively accepted wireless energy transform device, all adopt controllable resonant electric capacity at transmitting terminal and receiving terminal, by " introducing receiving terminal initiatively powers ", voltage, frequency, the phase place of power supply introduced in closed-loop control, and closed-loop control transmitting terminal and receiving terminal resonant capacitance calculate required appearance value according to demand, and dynamically change capacitance, quick real-time control desired parameters, thereby the power of active realization wireless power transmission, efficiency optimization.

In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.

Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.

Claims (22)

1. an active formula is initiatively accepted the wireless energy transfer method, it is characterized in that, may further comprise the steps:

A, transmitting terminal are according to default initial parameter emission wireless energy;

B, receiving terminal receive described wireless energy, determine the described parameter of described transmitting terminal;

The active transmission that c, described receiving terminal calculated and controlled described receiving terminal reaches the predeterminated voltage phase condition for volt circuit;

The appearance that d, described receiving terminal are adjusted the resonant capacitance of described receiving terminal is worth to receiving terminal resonant capacitance target appearance value;

E, described transmitting terminal inductive load are determined the parameter of described receiving terminal;

The appearance value of f, transmitting terminal control resonant capacitance reaches transmitting terminal resonant capacitance target appearance value; And

G, when pre-conditioned changing, repeating step b is to step f, to realize dynamic control.

2. the method for claim 1 is characterized in that, described receiving terminal carries out wireless telecommunications by the detection of induced electromotive force and with described transmitting terminal, determines the described parameter of described transmitting terminal.

3. the method for claim 1 is characterized in that, described parameter comprises service voltage frequency, phase place, amplitude and electrical parameter.

4. the method for claim 1 is characterized in that, described transmitting terminal carries out wireless telecommunications by the detection of induced electromotive force and with described receiving terminal, determines to connect the described parameter of described receiving end.

5. the method for claim 1 is characterized in that, the voltage-phase at the receiving coil two ends that described predeterminated voltage phase condition is described receiving terminal falls behind predetermined value than the voltage-phase at the transmitting coil two ends of described transmitting terminal.

6. the method for claim 1 is characterized in that, the scope of described predetermined value is 0 °-180 °.

7. the method for claim 1 is characterized in that, active transmission comprises frequency, phase place and the amplitude of output voltage for the output parameter of volt circuit.

8. the method for claim 1 is characterized in that, described receiving terminal resonant capacitance target appearance value is so that the difference of the main line electric current of described receiving terminal and main line voltage-phase is 180 °.

9. the method for claim 1 is characterized in that, described transmitting terminal calculates described transmitting terminal resonant capacitance target appearance value according to the main line voltage supply of described transmitting terminal circuit and the phase relation of electric current supply.

10. the method for claim 1 is characterized in that, described transmitting terminal resonant capacitance target appearance value is so that the main line electric current of described transmitting terminal and main line voltage homophase.

11. the method for claim 1 is characterized in that, the described pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

12. an active formula is initiatively accepted wireless energy transform device, it is characterized in that, comprising:

Transmitting terminal is used for according to default initial parameter emission wireless energy, and inductive load determine the parameter of described receiving terminal, and the appearance value of control resonant capacitance reaches transmitting terminal resonant capacitance target appearance value;

Described receiving terminal, be used for receiving described wireless energy, determine the described parameter of described transmitting terminal, the active transmission of calculating and control described receiving terminal reaches the predeterminated voltage phase condition for volt circuit, and the appearance of adjusting the resonant capacitance of described receiving terminal is worth to receiving terminal resonant capacitance target appearance value;

Described Dynamic control module is used for transmitting terminal and receiving terminal dynamically being adjusted, to realize dynamic control when pre-conditioned changing.

13. device as claimed in claim 11 is characterized in that, described receiving terminal carries out wireless telecommunications by the detection of induced electromotive force and with described transmitting terminal, determines the described parameter of described transmitting terminal.

14. device as claimed in claim 11 is characterized in that, described parameter comprises service voltage frequency, phase place, amplitude and electrical parameter.

15. device as claimed in claim 11 is characterized in that, described transmitting terminal carries out wireless telecommunications by the detection of induced electromotive force and with described receiving terminal, determines to connect the described parameter of described receiving end.

16. device as claimed in claim 11 is characterized in that, the voltage-phase at the receiving coil two ends that described predeterminated voltage phase condition is described receiving terminal falls behind predetermined value than the voltage-phase at the transmitting coil two ends of described transmitting terminal.

17. method as claimed in claim 12 is characterized in that, the scope of described predetermined value is 0 °-180 °.

18. device as claimed in claim 11 is characterized in that, active transmission comprises frequency, phase place and the amplitude of output voltage for the output parameter of volt circuit.

19. device as claimed in claim 11 is characterized in that, described receiving terminal resonant capacitance target appearance value is so that the difference of the main line electric current of described receiving terminal and main line voltage-phase is 180 °.

20. device as claimed in claim 11 is characterized in that, described transmitting terminal calculates described transmitting terminal resonant capacitance target appearance value according to the main line voltage supply of described transmitting terminal circuit and the phase relation of electric current supply.

21. device as claimed in claim 11 is characterized in that, described transmitting terminal resonant capacitance target appearance value is so that the main line electric current of described transmitting terminal and main line voltage homophase.

22. device as claimed in claim 11 is characterized in that, the described pre-conditioned power that comprises equipment transmits one or more in the electromagnetic medium around electromagnetic medium around demand, receiving terminal position, transmitting terminal position, the receiving terminal, the transmitting terminal.

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