CN103959604A - Wireless power-transfer device - Google Patents

Wireless power-transfer device Download PDF

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Publication number
CN103959604A
CN103959604A CN201380001945.9A CN201380001945A CN103959604A CN 103959604 A CN103959604 A CN 103959604A CN 201380001945 A CN201380001945 A CN 201380001945A CN 103959604 A CN103959604 A CN 103959604A
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electric
coil
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power transmission
power supply
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CN103959604B (en
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畑中武藏
津田尚
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Nitto Denko Corp
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Nitto Denko Corp
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Abstract

The coil plane of a power-feeding resonator (22) in a power-feeding module (202) and the coil plane of a power-receiving resonator (32) in a power-receiving module (203) are aligned so as to face each other, cylindrical magnetic members (23 and 33) that cover the entire inner coil surfaces of the power-feeding resonator (22) and the power-receiving resonator (32) are disposed inside the coils thereof, and magnetic fields between the power-feeding resonator (22) and the power-receiving resonator (32) are changed so as to transfer power. Magnetic fields that arise around the power-feeding resonator (22) and the power-receiving resonator (32) are thus blocked by the aforementioned magnetic members (23 and 33), making the energy transmission efficiency when power is transferred from the power-feeding module (202) to the power-receiving module (203) higher than said energy transmission efficiency would be if the magnetic members (23 and 33) were not used.

Description

Wireless power transmission device
Technical field
The present invention relates to a kind of wireless power transmission device that transmits electric power with cordless.
Background technology
Personal computer), the people such as plate PC, digital camera, the portable phone small-sized electronic equipment that can portably use is universal just rapidly in recent years, notebook type PC (personal computer:.And the major part in these electronic equipments is mounted with rechargeable battery, and need to regularly charge.In order to make that the charging operation of the rechargeable battery of these electronic equipments is become simply, by electric supply installation and be loaded into and utilize the electric power of wireless mode to transmit the equipment that power supply technique (making changes of magnetic field carry out the wireless power tranmission techniques of electric power transmission) charges to rechargeable battery between the current-collecting device of electronic equipment just constantly to increase.
For example, as wireless power tranmission techniques, can list technology (for example, with reference to patent documentation 1) that the electromagnetic induction utilizing between coil carries out electric power transmission, by the covibration between the resonator (coil) that utilizes electric supply installation and current-collecting device to possess, make magnetic Field Coupling carry out the technology (for example, with reference to patent documentation 2) of electric power transmission.
In this wireless power tranmission techniques, when transmitting with wireless mode, transmit to compare with electric power with wired mode and produced large transmission loss, therefore reduce this transmissions loss, (electric power that current-collecting device receives is with respect to the ratio of the electric power of electric supply installation conveying) becomes large problem to improve power transmission efficiency.
In order to solve this problem, following a kind of wireless power transmission device is for example disclosed in patent documentation 2: even in the situation that power transmission resonance coil and be subject to the distance change between electric resonance coil, also can be by the resonance frequency and the resonance frequency that is subject to electric resonance coil of change power transmission resonance coil, successively change power transmission resonance coil and be subject to the stiffness of coupling between electric resonance coil to maintain resonance condition, can improve thus the power transmission efficiency of the electric power from power transmission device to current-collecting device.In addition, following a kind of wireless power device being disclosed in patent documentation 3: by making power transmission coil and changed by the stiffness of coupling of electric coil, can improve the power transmission efficiency of device integral body.And, following a kind of electric power system is disclosed in patent documentation 4: power supply coil be subject to power supply resonance coil to be set between electric coil and to be subject to electric resonance coil, when supplying with electric power with cordless, detect power supply resonance coil and be subject to the distance c between electric resonance coil, correspondingly to the distance a of power supply coil and power supply resonance coil and be subject to electric coil and be subject to the distance b of electric resonance coil to carry out variable adjustment, make power supplying efficiency maximum with this distance c.
Patent documentation 1: No. 4624768 communique of Japan Patent
Patent documentation 2: TOHKEMY 2010-239769 communique
Patent documentation 3: TOHKEMY 2010-239777 communique
Patent documentation 4: TOHKEMY 2010-124522 communique
Summary of the invention
the problem that invention will solve
Really, by above-mentioned disclosed technology, can improve power transmission efficiency.Yet, in above-mentioned public technology, need to change resonance frequency control device, make control device that two stiffness of couplings between resonator change, to power supply coil and the distance of power supply resonance coil and the control device that adjusted by electric coil and the distance that is subject to electric resonance coil, not only become complexity but also cost of structure increases.
Therefore, the object of the present invention is to provide following a kind of wireless power transmission device: use unlike the past change resonance frequency control device, make control device that two stiffness of couplings between resonator change, to power supply coil and the distance of power supply resonance coil and the control device that adjusted by electric coil and the distance that is subject to electric resonance coil, just can be by more simple structure raising power transmission efficiency.
for the scheme of dealing with problems
For one of invention of solving above-mentioned problem be a kind of make magnetic field supply module be subject to the wireless power transmission device that between electric module, electric power transmission is carried out in variation, it is characterized in that above-mentioned supply module and above-mentionedly possessed by electric module: coil; And magnetic component, it covers coil in above-mentioned supply module and above-mentioned at least a portion being subject to coil in electric module face in opposite directions.
According to said structure, magnetic component covers the coil except supply module in and is subject at least a portion coil in electric module face in opposite directions, thus when making magnetic field at supply module and be subject between electric module to change to carry out electric power while transmitting, can make the power transmission efficiency of the energy when being subject to electric module to transmit electric power from supply module compare raising with the situation that does not configure magnetic component.
In addition, about for solving one of invention of above-mentioned problem, it is characterized in that, in above-mentioned wireless power transmission device, above-mentioned magnetic component is to cover the coil in supply module and/or configured by the mode of the inner peripheral surface of the coil in electric module.
According to said structure, by magnetic component to cover the coil in supply module and/or be configured by the mode of the inner peripheral surface of the coil in electric module, make magnetic field at supply module and be subject between electric module to change to carry out electric power while transmitting thus, the situation that can make the power transmission efficiency of the energy when being subject to electric module to transmit electric power from supply module and coil supply module and/or be subject to the inner peripheral surface side of the coil in electric module not configure magnetic component is compared raising.
In addition, about for solving one of invention of above-mentioned problem, it is characterized in that, in above-mentioned wireless power transmission device, above-mentioned magnetic component is to cover the coil in supply module and/or configured by the mode of the outer peripheral face of the coil in electric module.
According to said structure, by magnetic component to cover the coil in supply module and/or be configured by the mode of the outer peripheral face of the coil in electric module, make magnetic field at supply module and be subject between electric module to change to carry out electric power while transmitting thus, the situation that can make the power transmission efficiency of the energy when being subject to electric module to transmit electric power from supply module and coil supply module and/or be subject to the outer peripheral face side of the coil in electric module not configure magnetic component is compared raising.
In addition, about for solving one of invention of above-mentioned problem, it is characterized in that, in above-mentioned wireless power transmission device, above-mentioned magnetic component is to cover with respect to the coil in above-mentioned supply module and the above-mentioned mode of the face that coil in electric module face is in opposite directions opposition side that is subject to configure.
According to said structure, magnetic component be take to cover with respect to the coil in supply module and be configured with being subject to the mode of the face that coil in electric module face is in opposite directions opposition side, thus when making magnetic field at supply module and be subject between electric module to change to carry out electric power while transmitting, compare with the situation that is subject to face that coil in electric module face is in opposite directions opposition side not configure magnetic component with coil with respect in supply module, can make the power transmission efficiency of the energy when being subject to electric module to transmit electric power from supply module improve.
In addition, about for solving one of invention of above-mentioned problem, it is characterized in that, in above-mentioned wireless power transmission device, the coil from above-mentioned supply module is subject to the coil in electric module to utilize the electric power of covibration to transmit to above-mentioned.
According to said structure, in the situation that the coil in supply module and being subject to utilizes the electric power of covibration to transmit between the coil in electric module, can improve the power transmission efficiency of the energy when being subject to electric module to transmit electric power from supply module.
In addition, about for solving one of invention of above-mentioned problem, it is characterized in that, in above-mentioned wireless power transmission device, coil in above-mentioned supply module is power supply coil and power supply resonator, it is above-mentioned that to be subject to the coil in electric module be to be subject to electric coil and to be subject to electric resonance device, by electromagnetic induction, the electric power that is transported to above-mentioned power supply coil is transported to above-mentioned power supply resonator, by making above-mentioned power supply resonator and the above-mentioned electric resonance device resonance that is subject to that the electric power that is transported to above-mentioned power supply resonator is sent to the above-mentioned electric resonance device that is subject to magnetic field energy form from above-mentioned power supply resonator, by electromagnetic induction, by being sent to the above-mentioned electric power of electric resonance device that is subject to, be transported to the above-mentioned electric coil that is subject to, carry out thus above-mentioned electric power transmission.
According to said structure, in the situation that used power supply coil and power supply resonator and be subject to electric coil and be subject to electric resonance device to utilize the electric power of magnetic field resonance manner to transmit, can improve the power transmission efficiency of the energy when being subject to electric module to transmit electric power from supply module.
the effect of invention
Following a kind of wireless power feed system can be provided: use unlike the past change resonance frequency control device, make control device that two stiffness of couplings between resonator change, to power supply coil and the distance of power supply resonance coil and the control device that adjusted by electric coil and the distance that is subject to electric resonance coil, just can be by more simple structure raising power transmission efficiency.
Accompanying drawing explanation
Fig. 1 is the summary description figure of wireless power transmission device involved in the present invention.
Fig. 2 is the structure chart of the related wireless power transmission device of comparative example.
Fig. 3 is the curve chart that the measurement result of the related transmission characteristic S21 of comparative example is shown.
Fig. 4 is the related magnetic field distribution figure of comparative example.
Fig. 5 is the structure chart of the related wireless power transmission device of embodiment 1.
Fig. 6 is the curve chart that the measurement result of the related transmission characteristic S21 of embodiment 1 is shown.
Fig. 7 is the related magnetic field distribution figure of embodiment 1.
Fig. 8 is the structure chart of the related wireless power transmission device of embodiment 2.
Fig. 9 is the curve chart that the measurement result of the related transmission characteristic S21 of embodiment 2 is shown.
Figure 10 is the related magnetic field distribution figure of embodiment 2.
Figure 11 is the structure chart of the related wireless power transmission device of embodiment 3.
Figure 12 is the curve chart that the measurement result of the related transmission characteristic S21 of embodiment 3 is shown.
Figure 13 is the related magnetic field distribution figure of embodiment 3.
Figure 14 is the curve chart that the measurement result of power transmission efficiency is shown.
Figure 15 is the structure chart of the related wireless power transmission device of the second comparative example.
Figure 16 is the structure chart of the related wireless power transmission device of the second embodiment.
Figure 17 is the curve chart that the measurement result of the second comparative example and the related transmission characteristic S21 of the second embodiment is shown.
Figure 18 is the curve chart that the measurement result of the second comparative example and the related power transmission efficiency of the second embodiment is shown.
Figure 19 is the structure chart of the related wireless power transmission device of the 3rd comparative example.
Figure 20 is the structure chart of the related wireless power transmission device of the 3rd embodiment.
Figure 21 is the curve chart that the measurement result of the 3rd comparative example and the related transmission characteristic S21 of the 3rd embodiment is shown.
Figure 22 is the curve chart that the measurement result of the 3rd comparative example and the related power transmission efficiency of the 3rd embodiment is shown.
Figure 23 is the structure chart of the related wireless power transmission device of the 4th comparative example.
Figure 24 is the structure chart of the related wireless power transmission device of the 4th embodiment.
Figure 25 is the curve chart that the measurement result of the 4th comparative example and the related transmission characteristic S21 of the 4th embodiment is shown.
Figure 26 is the curve chart that the measurement result of the 4th comparative example and the related power transmission efficiency of the 4th embodiment is shown.
Figure 27 is the structure chart of the related wireless power transmission device of the 5th comparative example.
Figure 28 is the structure chart of the related wireless power transmission device of the 5th embodiment.
Figure 29 is the curve chart that the measurement result of the 5th comparative example and the related transmission characteristic S21 of the 5th embodiment is shown.
Figure 30 is the curve chart that the measurement result of the 5th comparative example and the related power transmission efficiency of the 5th embodiment is shown.
Embodiment
Below, based on embodiment and execution mode, wireless power transmission device involved in the present invention is described.
(summary)
As shown in Figure 1, wireless power transmission device 200 involved in the present invention has supply module 202 and is subject to electric module 203, wherein, this supply module 202 possesses power supply coil 21 and power supply resonator 22 (coil), this is subject to electric module 203 possess the electric coil of being subject to 31 and be subject to electric resonance device 32 (coil), so that the coil surface of this power supply resonator 22 configures power supply resonator 22 and is subject to electric resonance device 32 with the coil surface that is subject to electric resonance device 32 mode toward each other.In addition, supply module 202 and be subject to electric module 203 to possess magnetic component 23 and 33, this magnetic component 23 and 33 covers except power supply resonator 22 and is subject at least a portion electric resonance device 32 face in opposite directions.Specifically, the cylindrical shape of magnetic component 23, with cover the mode of coil inner peripheral surface integral body be configured in power supply resonator 22 coil inner peripheral surface side.Similarly, magnetic component 33 is cylindrical shape also, to cover the mode of coil inner peripheral surface integral body, is configured in the coil inner peripheral surface side that is subject to electric resonance device 32.In addition, the power supply coil 21 of supply module 202 is connected by distribution with the lead-out terminal 111 of network analyser 110 described later, can be with frequency arbitrarily from lead-out terminal 111 to power supply coil 21 output AC electric power.In addition, be connected by distribution with the input terminal 112 of network analyser 110 by the electric coil 31 that is subject to of electric module 203, can measure from being subject to electric coil 31 to be input to the electric power of input terminal 112.And, utilize covibration to make changes of magnetic field and be subject to the electric resonance device 32 that is subject to of electric module 203 to carry out electric power transmission from 22 pairs of the power supply resonators of supply module 202, can utilize thus magnetic component 23 and 33 blocking-up in power supply resonator 22 and the magnetic field that produced by the surrounding of electric resonance device 32, thus with do not configure magnetic component 23 and compare with 33 situation the power transmission efficiency of the energy when being subject to electric module 203 to transmit electric power from supply module 202 is improved.
At this, power supply resonator that supply module 202 possesses 22 and the electric resonance device 32 that is subject to that is subject to that electric module 203 possesses are coiling wire and the coil that forms, for example, can list and on polyimide substrate, form copper film, the spiral helicine coil of making by etching etc., coil the coil that wire forms, coil of ring-type etc. solenoid shape on this copper film.In addition, covibration refers to that plural coil carries out tuning with resonance frequency.In addition, what is called, so that coil and coil mode in opposite directions configures, refers to using the radial section of coil as coil surface, makes coil surface each other with the configuration ordinatedly toward each other of non-orthogonal mode.In addition, power transmission efficiency is to be subject to the electric power of electric module 203 receptions with respect to the ratio of the electric power of supply module 202 conveyings.
(the first embodiment)
Then, by measuring magnetic field intensity, transmission characteristic " S21 " and power transmission efficiency, to by the power supply resonator in supply module 22 with configured in opposite directions by the electric resonance device 32 that is subject in electric module, to cover the wireless power transmission device 100 (comparative example) that mode except at least a portion these forward surfaces configures the wireless power transmission device 200,300,400 (embodiment 1～3) of magnetic component and do not configure magnetic component, describe.
(structure of the wireless power transmission device 100 that comparative example is related)
As shown in Figure 2, the wireless power transmission device 100 using in comparative example possesses supply module 102 and is subject to electric module 103, wherein, this supply module 102 possesses power supply coil 21 and power supply resonator 22, and this is subject to electric module 103 possess the electric coil of being subject to 31 and be subject to electric resonance device 32.And power supply coil 21 is connected with the lead-out terminal 111 of network analyser 110 (Agilent Technologies limited company system).In addition, be connected with the input terminal 112 of network analyser 110 by electric coil 31.In the wireless power transmission device 100 forming by this way, when supply module 102 is supplied with to electric power, by covibration, electric power is supplied to and is subject to electric resonance device 32 from power supply resonator 22 with magnetic field energy form.
Network analyser 110 can be with frequency arbitrarily from lead-out terminal 111 to power supply coil 21 output AC electric power.In addition, network analyser 110 can be measured from being subject to electric coil 31 to be input to the electric power of input terminal 112.And, the detailed content aftermentioned of network analyser 110, but be made as the transmission characteristic " S21 " shown in can survey map 3 grades and the power transmission efficiency shown in Figure 14.
The following effect of power supply coil 21 performance: the electric power obtaining from network analyser 110 is supplied to power supply resonator 22 by electromagnetic induction.This power supply coil 21 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, and coil diameter is set as to 80mm φ.
Be subject to the following effect of electric coil 31 performance: will from power supply resonator 22, be sent to and be subject to the electric power of electric resonance device 32 by electromagnetic induction, to output to the input terminal 112 of network analyser 110 with magnetic field energy form.With power supply coil 21 similarly, this is subject to electric coil 31 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, and coil diameter is set as to 80mm φ.
Power supply resonance coil 22 is respectively LC resonant circuit with being subject to electric resonance coil 32, is bringing into play the effect that creates magnetic field resonance condition.In addition, in the present embodiment, by element, realize the capacitor composition of LC resonant circuit, but also the two ends of coil can be opened to the capacitor composition of realizing LC resonant circuit by parasitic capacitance.In this LC resonant circuit, when inductance being made as to L, when condenser capacity is made as to C, the f that (formula 1) determine of take is resonance frequency.
f = 1 / ( 2 π ( LC ) ) ) (formula 1)
In addition, power supply resonator 22 and to be subject to electric resonance device 32 be that the coil diameter that copper wire material (with insulating coating) coiling three circles that are 1mm φ by wire diameter obtain is the coil of the solenoid type of 100mm φ.In addition, power supply resonator 22 is 13.0MHz with being subject to the resonance frequency of electric resonance device 32.In addition, so that the coil surface of power supply resonator 22 and the coil surface that is subject to electric resonance device 32 in parallel with each other mode in opposite directions configure power supply resonator 22 and be subject to electric resonance device 32.
As mentioned above, when the resonance frequency of the resonator 22 that makes to power and be subject to 32 resonance of electric resonance device and at power supply resonator 22 when being subject to create magnetic field resonance condition between electric resonance device 32, electric power can be sent to and be subject to electric resonance device 32 (having utilized the electric power transmission of the covibration between coil) from power supply resonator 22 with magnetic field energy form.
In addition, distance A between power supply coil 21 and power supply resonator 22 is set as to 15mm, to be subject to electric coil 31 and be subject to the distance B between electric resonance device 32 to be set as 15mm, by power supply resonator 22 and be subject to the distance C between electric resonance device 32 to be set as 30mm (with reference to Fig. 2).
(measurement result of comparative example)
The measurement result of magnetic field intensity, transmission characteristic " S21 " and the power transmission efficiency that the related wireless power transmission device 100 of use comparative example is measured describes.In addition, about the measurement of magnetic field intensity, by analyzing with electromagnetic field analysis, with tone demonstration magnetic field intensity, measure.
First, while the frequency of using network analyser 110 to change the alternating electromotive force that is supplied to wireless power transmission device 100 transmission characteristic " S21 " of the related wireless power transmission device 100 of comparative example is measured.Now, as shown in the curve chart of Fig. 3, transverse axis is made as from the frequency of the alternating electromotive force of lead-out terminal 111 outputs, the longitudinal axis is made as to transmission characteristic " S21 " and measures.
At this, so-called transmission characteristic " S21 ", is illustrated in while having inputted signal from lead-out terminal 111 and passes through the signal of input terminal 112, with decibel, represents, numerical value means that more greatly power transmission efficiency is higher.In addition, as mentioned above, so-called power transmission efficiency, refer to and be subject to the electric power of electric module 203 receptions with respect to the ratio of the electric power of supply module 202 conveyings, at this, refer to wireless power transmission device 101 is being connected under the state of network analyser 110, output to the electric power of input terminal 112 with respect to be supplied to the ratio of the electric power of supply module from lead-out terminal 111.
Known according to the result of measuring, as shown in Figure 3, the measured waveform 141 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, by the frequency representation of lower frequency side, be fL.
And, near in the situation that the frequency f L peak value that is this lower frequency side by the frequency setting that is supplied to the alternating electromotive force of supply module 102, power supply resonator 22 and be subject to electric resonance device 32 to become resonance state with homophase, the sense of current of the power supply resonator 22 of flowing through with flow through that to be subject to the sense of current of electric resonance device 32 be equidirectional.By the magnetic field distribution under this homophase resonance mode shown in (A) of Fig. 4.According to the magnetic field distribution of this Fig. 4 (A), can confirm that magnetic field expands for electric resonance device 22 with centered by being subject to electric resonance device 32.At this, be subject to the resonance state that the sense of current of the coil (being subject to electric resonance device 32) in electric module is equidirectional to be called homophase resonance mode with flowing through the sense of current of the coil in supply module of flowing through (power supply resonator 22).
On the other hand, near in the situation that the frequency f H peak value that is high frequency side by the frequency setting that is supplied to the alternating electromotive force of supply module 102, power supply resonator 22 and be subject to electric resonance device 32 with the anti-phase resonance state that becomes, the sense of current of the power supply resonator 22 of flowing through with flow through that to be subject to the sense of current of electric resonance device 32 be rightabout.By the magnetic field distribution under this anti-phase resonance mode shown in (B) of Fig. 4.According to the magnetic field distribution of this Fig. 4 (B), also can confirm that magnetic field expands for electric resonance device 22 with centered by being subject to electric resonance device 32.In addition, can also confirm to exist between electric resonance device 32 at power supply resonator 22 and being subject to the low space of intensity in magnetic field.At this, by the sense of current of the coil in supply module of flowing through (power supply resonator 22) with flow through that to be subject to the sense of current of the coil (being subject to electric resonance device 32) in electric module be that rightabout resonance state is called anti-phase resonance mode.
Then, use the homophase resonance mode of the related wireless power transmission device 100 of 110 pairs of comparative examples of network analyser and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 14.Now, in the curve chart of Figure 14, comparative example and embodiment 1～3 are configured to transverse axis, power transmission efficiency [%] is recited as to the longitudinal axis.
As shown in figure 14, about comparative example, the power transmission efficiency of homophase resonance mode (fL) is 85% (with reference to Figure 14: ■ 151).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 69% (with reference to Figure 14: ● 152).
(structure of the wireless power transmission device 200 that embodiment 1 is related)
Then, as shown in Figure 5, the wireless power transmission device 200 using in embodiment 1 possesses supply module 202 and is subject to electric module 203, wherein, the magnetic component cylindraceous 23 that this supply module 202 possesses power supply coil 21, power supply resonator 22 and covers the coil inner peripheral surface integral body of this power supply resonator 22, the magnetic component cylindraceous 33 that this is possessed by electric module 203 and be subject to electric coil 31, is subject to electric resonance device 32 and covers the coil inner peripheral surface integral body that is subject to electric resonance device 32.And, with comparative example similarly, power supply coil 21 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 31.
Magnetic component 23 and 33 is formed by the resin that is dispersed with Magnaglo.The resin that this magnetic component 23 and 33 is used can be both that thermosetting resin can be also thermoplastic resin, did not limit especially.For example,, if thermosetting resin can list epoxy resin, phenolic resins, melmac, vinylester resin, cyano group ester (Cyano ester) resin, maleimide resin, silicones etc.In addition, if thermoplastic resin can list acrylic resin, vinyl acetate esters resin, polyvinyl alcohol resin etc.In addition, in the present embodiment, use and take the resin that epoxy resin is main component.
In addition, for the Magnaglo being dispersed in resin, use soft magnetic powder.As soft magnetic powder, do not limit especially, can use pure Fe, Fe-Si, Fe-Al-Si (sendust), Fe-Ni (permalloy), soft magnetic bodies oxysome, the based amorphous body of Fe, the based amorphous body of Co, Fe-Co (Po Mingde anvil is high-permeability alloy) etc.
It is that 1mm, external diameter are the drum that 80mm φ, internal diameter are 78mm that above-mentioned magnetic component 23 and 33 is thickness, and its magnetic permeability is 100.In addition, other structure wireless power transmission device 100 related with comparative example is identical.
(measurement result of embodiment 1)
The measurement result of magnetic field intensity, transmission characteristic " S21 " and the power transmission efficiency that the related wireless power transmission device 200 of use embodiment 1 is measured describes.
First, while the frequency of using network analyser 110 to change the alternating electromotive force that is supplied to wireless power transmission device 200 transmission characteristic " S21 " of the related wireless power transmission device 200 of embodiment 1 is measured.
Known according to the result of measuring, as shown in Figure 6, the measured waveform 241 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, by the frequency representation of lower frequency side, be fL.
And, near in the situation that the frequency f L (homophase resonance mode) peak value that is this lower frequency side by the frequency setting that is supplied to the alternating electromotive force of supply module 202, power supply resonator 22 and be subject to electric resonance device 32 to become resonance state with homophase, the sense of current of the power supply resonator 22 of flowing through with flow through that to be subject to the sense of current of electric resonance device 32 be equidirectional.By the magnetic field distribution under this homophase resonance mode shown in (A) of Fig. 7.According to the magnetic field distribution of this Fig. 7 (A), can confirm to compare with comparative example (with reference to (A) of Fig. 4), can and a bit weakened by the magnetic field of the inner circumferential side of electric resonance device 32 by power supply resonator 22.
On the other hand, near in the situation that the frequency f H peak value that is high frequency side by the frequency setting that is supplied to the alternating electromotive force of supply module 202 (anti-phase resonance mode), power supply resonator 22 and be subject to electric resonance device 32 with the anti-phase resonance state that becomes, the sense of current of the power supply resonator 22 of flowing through with flow through that to be subject to the sense of current of electric resonance device 32 be rightabout.By the magnetic field distribution under this anti-phase resonance mode shown in (B) of Fig. 7.According to the magnetic field distribution of this Fig. 7 (B), can confirm to compare with comparative example (with reference to (B) of Fig. 4), power supply resonator 22 and significantly weakened by the magnetic field of the inner circumferential side of electric resonance device 32.
Then, use the homophase resonance mode of the related wireless power transmission device 200 of 110 couples of embodiment 1 of network analyser and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 14.
As shown in figure 14, about embodiment 1, the power transmission efficiency under homophase resonance mode (fL) is 88% (with reference to Figure 14: ■ 251).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 75% (with reference to Figure 14: ● 252).Like this, the known wireless power transmission device 100 related with comparative example 1 compared, and the power transmission efficiency of the wireless power transmission device 200 in embodiment 1 improves.; with at power supply resonator 22, do not configure magnetic component 23 with the inner peripheral surface side that is subject to electric resonance device 32 and compare with 33 wireless power transmission device 100, according to the wireless power transmission device 200 that possesses as described above magnetic component 23 and 33, can improve power transmission efficiency.
(structure of the wireless power transmission device 300 that embodiment 2 is related)
Then, as shown in Figure 8, the wireless power transmission device 300 using in embodiment 2 possesses supply module 302 and is subject to electric module 303, wherein, this supply module 302 possesses power supply coil 21, power supply resonator 22, cover the magnetic component cylindraceous 23 of coil inner peripheral surface integral body of power supply resonator 22 and the magnetic component cylindraceous 24 of the coil outer peripheral face integral body of covering power supply resonator 22, this is subject to electric module 303 to possess the electric coil of being subject to 31, be subject to electric resonance device 32, covering is subject to the magnetic component cylindraceous 33 of coil inner peripheral surface integral body of electric resonance device 32 and the magnetic component cylindraceous 34 that covers the coil outer peripheral face integral body be subject to electric resonance device 32.And similarly to Example 1, power supply coil 21 is connected with the lead-out terminal 111 of network analyser 110, be connected by electric coil 31 with the input terminal 112 of network analyser 110.
With the magnetic component 23 and 33 of embodiment 1 similarly, magnetic component 24 and 34 is formed by the resin that is dispersed with Magnaglo.It is that 1mm, external diameter are that 120mm φ, internal diameter are the drum of 118mm φ that this magnetic component 24 and 34 is thickness, and its magnetic permeability is 100.In addition, other structure wireless power transmission device 200 related with embodiment 1 is identical.
(measurement result of embodiment 2)
The measurement result of magnetic field intensity, transmission characteristic " S21 " and the power transmission efficiency that the related wireless power transmission device 300 of use embodiment 2 is measured describes.
First, while the frequency of using network analyser 110 to change the alternating electromotive force that is supplied to wireless power transmission device 300 transmission characteristic " S21 " of the related wireless power transmission device 300 of embodiment 2 is measured.
Known according to the result of measuring, as shown in Figure 9, the measured waveform 341 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, by the frequency representation of lower frequency side, be fL.
And, by the frequency setting of alternating electromotive force that is supplied to supply module 302 during near the frequency f L peak value of this lower frequency side the magnetic field distribution of (homophase resonance mode) shown in (A) of Figure 10.According to the magnetic field distribution of this Figure 10 (A), can confirm to compare with comparative example (with reference to (A) of Fig. 4), power supply resonator 22 and a bit weakened by the magnetic field of the inner circumferential side of electric resonance device 32.In addition, can confirm to compare with embodiment 1 (with reference to (A) of Fig. 7), escape to power supply resonator 22 and the field weakening that is subject to the outer circumferential side of electric resonance device 32.
During near the frequency f H peak value that is high frequency side by the frequency setting that is supplied to the alternating electromotive force of supply module 302 on the other hand,, the magnetic field distribution of (anti-phase resonance mode) is shown in (B) of Figure 10.According to the magnetic field distribution of this Figure 10 (B), can confirm to compare with comparative example (with reference to (B) of Fig. 4), power supply resonator 22 and significantly weakened by the magnetic field of the inner circumferential side of electric resonance device 32.In addition, can confirm to compare with embodiment 1 (with reference to (B) of Fig. 7), escape to power supply resonator 22 and the field weakening that is subject to the outer circumferential side of electric resonance device 32.
Then, use the homophase resonance mode of the related wireless power transmission device 300 of 110 couples of embodiment 2 of network analyser and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 14.
As shown in figure 14, about embodiment 2, the power transmission efficiency under homophase resonance mode (fL) is 90% (with reference to Figure 14: ■ 351).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 78% (with reference to Figure 14: ● 352).Like this, the known wireless power transmission device 100 related with comparative example 1 wireless power transmission device 200 related with embodiment 1 compared, and the power transmission efficiency of the wireless power transmission device 300 of embodiment 2 improves.; with only at power supply resonator 22, dispose magnetic component 23 with the inner peripheral surface side that is subject to electric resonance device 32 and compare with 33 wireless power transmission device 200, according to possess as described above magnetic component 23 and 33 and the wireless power transmission device 300 of magnetic component 24 and 34 can improve power transmission efficiency.
(structure of the wireless power transmission device 400 that embodiment 3 is related)
Then, as shown in figure 11, the wireless power transmission device 400 using in embodiment 3 possesses supply module 402 and is subject to electric module 403, wherein, this supply module 402 possesses power supply coil 21, power supply resonator 22, cover the magnetic component cylindraceous 23 of the coil inner peripheral surface integral body of power supply coil 21 and power supply resonator 22, cover the magnetic component 25 of the magnetic component cylindraceous 24 of coil outer peripheral face integral body of power supply coil 21 and power supply resonator 22 and the ring-type of the side that the coil forward surface of covering and power supply resonator 22 is opposition side, this is subject to electric module 403 to possess the electric coil of being subject to 31, be subject to electric resonance device 32, covering is subject to electric coil 31 and is subject to the magnetic component cylindraceous 33 of the coil inner peripheral surface integral body of electric resonance device 32, covering is subject to electric coil 31 and is subject to the magnetic component cylindraceous 34 of coil outer peripheral face integral body of electric resonance device 32 and the magnetic component 35 that covers and be subject to the ring-type of the side that the coil forward surface of electric resonance device 32 is opposition side.And similarly to Example 2, power supply coil 21 is connected with the lead-out terminal 111 of network analyser 110, be connected by electric coil 31 with the input terminal 112 of network analyser 110.
With the magnetic component 23 and 33 of embodiment 1 similarly, magnetic component 25 and 35 is formed by the resin that is dispersed with Magnaglo.It is that 1mm, external diameter are the O shape ring-type that 120mm, internal diameter are 80mm that this magnetic component 25 and 35 is thickness, and its magnetic permeability is 100.In addition, other structure wireless power transmission device 300 related with embodiment 2 is identical.
(measurement result of embodiment 3)
The measurement result of magnetic field intensity, transmission characteristic " S21 " and the power transmission efficiency that the related wireless power transmission device 400 of use embodiment 3 is measured describes.
First, while the frequency of using network analyser 110 to change the alternating electromotive force that is supplied to wireless power transmission device 400 transmission characteristic " S21 " of the related wireless power transmission device 400 of embodiment 3 is measured.
Known according to the result of measuring, as shown in Figure 12, the measured waveform 441 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, the frequency representation of lower frequency side is fL.
And, by the frequency setting of alternating electromotive force that is supplied to supply module 402 during near the frequency f L peak value of this lower frequency side the magnetic field distribution of (homophase resonance mode) shown in (A) of Figure 13.According to the magnetic field distribution of this Figure 13 (A), can confirm to compare with comparative example (with reference to (A) of Fig. 4), power supply resonator 22 and a bit weakened by the magnetic field of the inner circumferential side of electric resonance device 32.In addition, can confirm to compare with embodiment 1 (with reference to (A) of Fig. 7), escape to power supply resonator 22 and the field weakening that is subject to the outer circumferential side of electric resonance device 32.In addition, can confirm to compare with embodiment 2 (with reference to (A) of Figure 10), escape to power supply resonator 22 and be subject to the field weakening of the side of electric resonance device 32.
During near the frequency f H peak value that is high frequency side by the frequency setting that is supplied to the alternating electromotive force of supply module 402 on the other hand,, the magnetic field distribution of (anti-phase resonance mode) is shown in (B) of Figure 13.According to the magnetic field distribution of this Figure 13 (B), can confirm to compare with comparative example (with reference to (B) of Fig. 4), power supply resonator 22 and significantly weakened by the magnetic field of the inner circumferential side of electric resonance device 32.In addition, can confirm to compare with embodiment 1 (with reference to (B) of Fig. 7), escape to power supply resonator 22 and the field weakening that is subject to the outer circumferential side of electric resonance device 32.In addition, can confirm to compare with embodiment 2 (with reference to (B) of Figure 10), escape to power supply resonator 22 and be subject to the field weakening of the side of electric resonance device 32.
Then, use the homophase resonance mode of the related wireless power transmission device 400 of 110 couples of embodiment 3 of network analyser and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 14.
As shown in figure 14, about embodiment 3, the power transmission efficiency under homophase resonance mode (fL) is 97% (with reference to Figure 14: ■ 451).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 94% (with reference to Figure 14: ● 452).Like this, the known wireless power transmission device 100 related with comparative example 1, related wireless power transmission device 200 and the related wireless power transmission device 300 of embodiment 2 of embodiment 1 are compared, and the power transmission efficiency of the wireless power transmission device 400 of embodiment 3 improves.; with only power supply resonator 22 and the inner peripheral surface side that is subject to electric resonance device 32 and outer peripheral face side dispose magnetic component 23 with 33 and magnetic component 24 compare with 34 wireless power transmission device 300, according to possess as described above magnetic component 23 and 33, magnetic component 24 and 34 and the wireless power transmission device 400 of magnetic component 25 and 35 can improve power transmission efficiency.
(the second embodiment)
In the wireless power transmission device 200,300,400 of above-mentioned the first embodiment, to power supply coil in supply module and power supply resonator and be subject to being subject to electric coil and being subject to electric resonance device to use the situation of the coil cylindraceous of circular and solenoid type to be illustrated in electric module, but in a second embodiment, the wireless power transmission device to the power supply coil in supply module and power supply resonator and while being subject to being subject to electric coil and being subject to electric resonance device to use the coil of tubular of square and cubic column type in electric module describes.Specifically, by measuring transmission characteristic " S21 " and power transmission efficiency, to by the power supply resonator in supply module with configured in opposite directions by the electric resonance device that is subject in electric module, at power supply resonator with disposed by the coil inner peripheral surface side of electric resonance device to cover the wireless power transmission device 1200 of magnetic component of tubular of cubic column type of coil inner peripheral surface integral body and the wireless power transmission device 1100 (hereinafter referred to as the second comparative example) that does not configure magnetic component to describe.
(structure of the wireless power transmission device 1100 that the second comparative example is related)
As shown in figure 15, the wireless power transmission device 1100 using in the second comparative example possesses supply module 1102 and is subject to electric module 1103, wherein, this supply module 1102 possesses the power supply resonator 1122 that is tetragonal power supply coil 1121 and is the tubular coil structure of cubic column type, this possessed by electric module 1103 to be tetragonal be subject to electric coil 1131 and be cubic column type tubular coil structure be subject to electric resonance device 1132.And, with the first embodiment similarly, power supply coil 1121 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1131.
The following effect of power supply coil 1121 performance: the electric power obtaining from network analyser 110 is supplied to power supply resonator 1122 by electromagnetic induction.This power supply coil 1121 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby be on one side, is the square of 100mm.
Be subject to the following effect of electric coil 1131 performance: by electromagnetic induction, the input terminal 112 that is subject to the electric power of electric resonance device 1132 to output to network analyser 110 will be supplied to magnetic field energy form from power supply resonator 1122.With power supply coil 1121 similarly, this is subject to electric coil 1131 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby be on one side, is the square of 100mm.
Power supply resonator 1122 is respectively LC resonant circuit with being subject to electric resonance device 1132, the effect that performance creates magnetic field resonance condition.The tubular coil structure of the cubic column type that one side that power supply resonator 1122 and copper wire material (with insulating coating) coiling three circles that to be subject to electric resonance device 1132 to be wire diameter be 1mm φ obtain is 100mm.
In addition, distance between power supply coil 1121 and power supply resonator 1122 is set as to 15mm, by power supply resonator 1122 and be subject to the distance between electric resonance device 1132 to be set as 30mm, will be subject to electric resonance device 1132 and be subject to the distance between electric coil 1131 to be set as 15mm.In addition, power supply resonator 1122 is 14.2MHz with being subject to the resonance frequency of electric resonance device 1132.In addition, so that the coil surface of power supply resonator 1122 and the coil surface that is subject to electric resonance device 1132 in parallel with each other mode in opposite directions configure power supply resonator 1122 and be subject to electric resonance device 1132.
(structure of the wireless power transmission device 1200 that the second embodiment is related)
As shown in figure 16, the wireless power transmission device 1200 using in the second embodiment possesses supply module 1202 and is subject to electric module 1203, wherein, this supply module 1202 possesses and is tetragonal power supply coil 1221, the magnetic component 1223 that is the power supply resonator 1222 of tubular coil structure of cubic column type and the barrel shape that is cubic column type of the coil inner peripheral surface integral body of covering power supply resonator 1222, this is possessed by electric module 1203 to be the tetragonal electric coil 1231 that is subject to, the magnetic component 1233 that is subject to electric resonance device 1232 and covers the barrel shape that is cubic column type of the coil inner peripheral surface integral body that is subject to electric resonance device 1232 that is the tubular coil structure of cubic column type.And, with the second comparative example similarly, power supply coil 1221 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1231.
With the first embodiment similarly, magnetic component 1223 and 1233 is formed by the resin that is dispersed with Magnaglo.It is that 1mm, outside are that 82mm, inner edge are 80mm, are highly the barrel shape of the cubic column type of 30mm that this magnetic component 1223 and 1233 is thickness, and its magnetic permeability is 100.In addition, power supply coil 1221, power supply resonator 1222, be subject to electric coil 1231, be subject to other structures such as electric resonance device 1232 wireless power transmission device 1100 related with the second comparative example identical.
(measurement result of the second comparative example and the second embodiment)
To using the measurement result of transmission characteristic " S21 " and the measurement result of the transmission characteristic " S21 " that the related wireless power transmission device 1200 of use the second embodiment is measured that the related wireless power transmission device of the second comparative example 1100 is measured to describe.
Use network analyser 110 while the frequency that changes the alternating electromotive force that is supplied to wireless power transmission device 1100, the transmission characteristic " S21 " of the related wireless power transmission device 1100 of the second comparative example to be measured.Similarly, while change the frequency of the alternating electromotive force that is supplied to wireless power transmission device 1200 transmission characteristic " S21 " of the related wireless power transmission device 1200 of the second embodiment measured.In addition, as mentioned above, transmission characteristic " S21 " is illustrated in while having inputted signal from lead-out terminal 111 and passes through the signal of input terminal 112, with decibel, represents, numerical value means that more greatly power transmission efficiency is higher.In addition, as mentioned above, so-called power transmission efficiency, refer to and be subject to the electric power of electric module reception with respect to the ratio of the electric power of supply module conveying, at this, refer under the state being connected with network analyser 110 at wireless power transmission device 101, output to the electric power of input terminal 112 with respect to be supplied to the ratio of the electric power of supply module from lead-out terminal 111.
Known according to the result of the measurement of the second comparative example, as shown in Figure 17 (A), the measured waveform 1141 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, the frequency representation of lower frequency side is fL.
On the other hand, known according to the result of the measurement of the second embodiment, as shown in Figure 17 (B), the measured waveform 1241 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.And the two all shows the value of transmission characteristic " S21 " of frequency f H of high frequency side of separated peak value and the value of the transmission characteristic " S21 " of the frequency f L of lower frequency side than the high value of the measured waveform of the second comparative example 1141 (with reference to (A) of Figure 17).Thus, the power transmission efficiency of the known wireless power transmission device 1100 related with the second comparative example is compared, and the power transmission efficiency of the wireless power transmission device 1200 of the second embodiment improves.; known according to the measurement result of transmission characteristic " S21 "; even by the power supply coil in supply module 1,202 1221 and power supply resonator 1222 and be subject to being subject to electric coil 1231 and being subject to the coil shape of electric resonance device 1232 to be made as the cylindrical shape of square and cubic column type in electric module 1203; with at power supply resonator 1122, do not configure magnetic component 1223 with the inner peripheral surface side that is subject to electric resonance device 1132 and compare with 1233 wireless power transmission device 1100, as long as be configured to the structure that possesses magnetic component 1223 and 1233, also can improve power transmission efficiency.
Then, use the homophase resonance mode of the related wireless power transmission device 1200 of the homophase resonance mode of the related wireless power transmission device 1100 of 110 pairs of the second comparative examples of network analyser and the power transmission efficiency under anti-phase resonance mode and the second embodiment and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 18.Now, in the curve chart of Figure 18, the second comparative example and the second embodiment are configured to transverse axis, power transmission efficiency [%] is recited as to the longitudinal axis.
As shown in figure 18, about the second comparative example, the power transmission efficiency under homophase resonance mode (fL) is 74.3% (with reference to Figure 18: ■ 1151) to the result of measuring.In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 51.8% (with reference to Figure 18: ● 1152).
On the other hand, about the second embodiment, the power transmission efficiency under homophase resonance mode (fL) is 85.2% (with reference to Figure 18: ■ 1251).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 67.9% (with reference to Figure 18: ● 1252).Like this, the known wireless power transmission device 1100 related with the second comparative example compared, and the power transmission efficiency of the wireless power transmission device 1200 of the second embodiment improves.; known with at power supply resonator 1122, do not configure magnetic component 1223 with the inner peripheral surface side that is subject to electric resonance device 1132 and compare with 1233 wireless power transmission device 1100, according to the wireless power transmission device 1200 that possesses as described above magnetic component 1223 and 1233, can improve power transmission efficiency.
(the 3rd embodiment)
Wireless power transmission device 200 at above-mentioned the first embodiment, 300, in 400, to power supply coil in supply module and power supply resonator and be subject to being subject to electric coil and being subject to electric resonance device to use the situation of the coil cylindraceous of circular and solenoid type to be illustrated in electric module, in addition, in the wireless power transmission device 1200 of the second embodiment, to the power supply coil in supply module and power supply resonator and be subject to being subject to electric coil and being subject to electric resonance device to use the situation of coil of the tubular of square and cubic column type to be illustrated in electric module, in the 3rd embodiment, wireless power transmission device to the power supply coil in supply module and power supply resonator and while being subject to being subject to electric coil and being subject to electric resonance device to use as shown in Figure 19 the coil of crescent-shaped and lunate tubular in electric module describes.Specifically, by measuring transmission characteristic " S21 " and power transmission efficiency, to by the power supply resonator in supply module with configured in opposite directions by the electric resonance device that is subject in electric module, at power supply resonator with disposed by the coil inner peripheral surface side of electric resonance device to cover the wireless power transmission device 1400 of magnetic component of lunate tubular of coil inner peripheral surface integral body and the wireless power transmission device 1300 (hereinafter referred to as the 3rd comparative example) that does not configure magnetic component to describe.
(structure of the wireless power transmission device 1300 that the 3rd comparative example is related)
As shown in figure 19, the wireless power transmission device 1300 using in the 3rd comparative example possesses supply module 1302 and is subject to electric module 1303, wherein, this supply module 1302 possesses the power supply coil 1321 that is crescent-shaped and the power supply resonator 1322 that is lunate tubular coil structure, this possessed by electric module 1303 to be crescent-shaped be subject to electric coil 1331 and be lunate tubular coil structure be subject to electric resonance device 1332.And, with the first embodiment similarly, power supply coil 1321 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1331.
The following effect of power supply coil 1321 performance: the electric power obtaining from network analyser 110 is supplied to power supply resonator 1322 by electromagnetic induction.This power supply coil 1321 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby be as shown in Figure 19, the outer diameter of a circle of the coil of power supply coil 1321 is made as to the crescent-shaped that 60mm, interior diameter of a circle are 30mm.
Be subject to the following effect of electric coil 1331 performance: by electromagnetic induction, the input terminal 112 that is subject to the electric power of electric resonance device 1332 to output to network analyser 110 will be sent to magnetic field energy form from power supply resonator 1322.With power supply coil 1321 similarly, this is subject to electric coil 1331 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby be, the outer diameter of a circle that is subject to the coil of electric coil 1331 is made as to the crescent-shaped that 60mm, interior diameter of a circle are 30mm.
Power supply resonator 1322 is respectively LC resonant circuit with being subject to electric resonance device 1332, the effect that performance creates magnetic field resonance condition.Power supply resonator 1322 and be subject to copper wire material (with the insulating coating) coiling three that electric resonance device 1332 is 1mm φ by wire diameter to enclose (being made as 0.1mm between line), is made as by the outer diameter of a circle of coil the lunate tubular coil structure that 60mm, interior diameter of a circle are 30mm thereby be.
In addition, distance between power supply coil 1321 and power supply resonator 1322 is set as to 10mm, by power supply resonator 1322 and be subject to the distance between electric resonance device 1332 to be set as 8mm, will be subject to electric resonance device 1332 and be subject to the distance between electric coil 1331 to be set as 10mm.In addition, power supply resonator 1322 is 15.5MHz with being subject to the resonance frequency of electric resonance device 1332.In addition, so that the coil surface of power supply resonator 1322 and the coil surface that is subject to electric resonance device 1332 in parallel with each other mode in opposite directions configure power supply resonator 1322 and be subject to electric resonance device 1332.
(structure of the wireless power transmission device 1400 that the 3rd embodiment is related)
As shown in figure 20, the wireless power transmission device 1400 using in the 3rd embodiment possesses supply module 1402 and is subject to electric module 1403, wherein, this supply module 1402 possesses the power supply coil 1421 that is crescent-shaped, the magnetic component 1423 that is the lunate tubular of the power supply resonator 1422 of lunate tubular coil structure and the coil inner peripheral surface integral body of covering power supply resonator 1422, what this was possessed by electric module 1403 to be crescent-shaped is subject to electric coil 1431, the magnetic component 1433 that is subject to electric resonance device 1432 and covers the lunate tubular of the coil inner peripheral surface integral body that is subject to electric resonance device 1432 that is lunate tubular coil structure.And, with the 3rd comparative example similarly, power supply coil 1421 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1431.
With the first embodiment similarly, magnetic component 1423 and 1433 is formed by the resin that is dispersed with Magnaglo.The lunate barrel shape that it is 1mm that this magnetic component 1423 and 1433 is along power supply resonator 1422 and the thickness that is subject to the inner peripheral surface of electric resonance device 1432, its magnetic permeability is 100.In addition, power supply coil 1421, power supply resonator 1422, be subject to electric coil 1431, be subject to other structures such as electric resonance device 1432 wireless power transmission device 1300 related with the 3rd comparative example identical.
(measurement result of the 3rd comparative example and the 3rd embodiment)
To using the measurement result of transmission characteristic " S21 " and the measurement result of the transmission characteristic " S21 " that the related wireless power transmission device 1400 of use the 3rd embodiment is measured that the related wireless power transmission device 1300 of the 3rd comparative example is measured to describe.
Use network analyser 110 while the frequency that changes the alternating electromotive force that is supplied to wireless power transmission device 1300, the transmission characteristic " S21 " of the related wireless power transmission device 1300 of the 3rd comparative example to be measured.Similarly, while change the frequency of the alternating electromotive force that is supplied to wireless power transmission device 1400 transmission characteristic " S21 " of the related wireless power transmission device 1400 of the 3rd embodiment measured.
Known according to the measurement result of the 3rd comparative example, as shown in Figure 21 (A), the measured waveform 1341 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, the frequency representation of lower frequency side is fL.
On the other hand, known according to the result of the measurement of the 3rd embodiment, as shown in Figure 21 (B), the measured waveform 1441 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.And the two all shows the value of transmission characteristic " S21 " of frequency f H of high frequency side of separated peak value and the value of the transmission characteristic " S21 " of the frequency f L of lower frequency side than the high value of the measured waveform of the 3rd comparative example 1341 (with reference to (A) of Figure 21).Thus, the power transmission efficiency of the known wireless power transmission device 1300 related with the 3rd comparative example is compared, and the power transmission efficiency of the wireless power transmission device 1400 of the 3rd embodiment improves.; known according to the measurement result of transmission characteristic " S21 "; even by the power supply coil in supply module 1,402 1421 and power supply resonator 1422, be subject to being subject to electric coil 1431 and being subject to the coil shape of electric resonance device 1432 to be made as crescent-shaped and lunate cylindrical shape in electric module 1403; with at power supply resonator 1322, do not configure magnetic component 1423 with the inner peripheral surface side that is subject to electric resonance device 1332 and compare with 1433 wireless power transmission device 1300, need only and be configured to as described above the structure that possesses magnetic component 1423 and 1433 and also can improve power transmission efficiency.
Then, use the homophase resonance mode of the related wireless power transmission device 1400 of the homophase resonance mode of the related wireless power transmission device 1300 of 110 pairs of the 3rd comparative examples of network analyser and the power transmission efficiency under anti-phase resonance mode and the 3rd embodiment and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 22.Now, in the curve chart of Figure 22, the 3rd comparative example and the 3rd embodiment are configured to transverse axis, power transmission efficiency [%] is recited as to the longitudinal axis.
As shown in figure 22, about the 3rd comparative example, the power transmission efficiency under homophase resonance mode (fL) is 38.7% (with reference to Figure 22: ■ 1351) to the result of measuring.In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 9.1% (with reference to Figure 22: ● 1352).
On the other hand, about the 3rd embodiment, the power transmission efficiency under homophase resonance mode (fL) is 82.3% (with reference to Figure 22: ■ 1451).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 39.9% (with reference to Figure 22: ● 1452).Like this, the known wireless power transmission device 1300 related with the 3rd comparative example compared, and the power transmission efficiency of the wireless power transmission device 1400 of the 3rd embodiment improves.; known with at power supply resonator 1322, do not configure magnetic component 1423 with the inner peripheral surface side that is subject to electric resonance device 1332 and compare with 1433 wireless power transmission device 1300, according to the wireless power transmission device 1400 that possesses as described above magnetic component 1423 and 1433, can improve power transmission efficiency.
(the 4th embodiment)
In the wireless power transmission device 200,300,400 of the first embodiment, to the power supply coil in supply module and power supply resonator and be subject to being subject to electric coil and being subject to electric resonance device to use the situation of coil that coil diameter is set as to the same diameter of 100mm φ to be illustrated in electric module, but in the 4th embodiment, to the power supply coil in supply module with power supply resonator and be subject to being subject to electric coil and being subject to electric resonance device to use like that as shown in figure 23 the wireless power transmission device in the situation of the different coil of coil diameter to describe in electric module.Specifically, use and be subject to being subject to electric coil and being subject to the coil diameter of electric resonance device than the little wireless power transmission device of coil diameter of the power supply coil in supply module and power supply resonator in electric module.And, by measuring transmission characteristic " S21 " and power transmission efficiency, to by the power supply resonator in supply module with configured in opposite directions by the electric resonance device that is subject in electric module, at power supply resonator with disposed by the coil inner peripheral surface side of electric resonance device to cover the wireless power transmission device 1600 of magnetic component cylindraceous of coil inner peripheral surface integral body and the wireless power transmission device 1500 (hereinafter referred to as the 4th comparative example) that does not configure magnetic component to describe.
(structure of the wireless power transmission device 1500 that the 4th comparative example is related)
As shown in figure 23, the wireless power transmission device 1500 using in the 4th comparative example possesses supply module 1502 and is subject to electric module 1503, wherein, this supply module 1502 possesses rounded power supply coil 1521 and the power supply resonator 1522 of cylindrical shape, this be subject to electric module 1503 possess rounded be subject to electric coil 1531 and cylindrical shape be subject to electric resonance device 1532.And, with the first embodiment similarly, power supply coil 1521 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1531.
The following effect of power supply coil 1521 performance: the electric power obtaining from network analyser 110 is supplied to power supply resonator 1522 by electromagnetic induction.This power supply coil 1521 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby is the circle that internal diameter is 54mm φ (with reference to the sectional view of Figure 23).
Be subject to the following effect of electric coil 1531 performance: by electromagnetism sense, the input terminal 112 that is subject to the electric power of electric resonance device 1532 to output to network analyser 110 will be sent to magnetic field energy form from power supply resonator 1522.This is subject to electric coil 1531 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby is the circle that internal diameter is 36mm φ (with reference to the sectional view of Figure 23).
Power supply resonator 1522 is respectively LC resonant circuit with being subject to electric resonance device 1532, the effect that performance creates magnetic field resonance condition.The internal diameter of the coil that copper wire material (with insulating coating) coiling four circles that power supply resonator 1522 is is 1mm φ by wire diameter obtain is the coil of the solenoid type of 54mm φ, and resonance frequency is 17.2MHz (with reference to the sectional view of Figure 23).On the other hand, being subject to electric resonance device 1532 is that the internal diameters of the coil that obtains of copper wire material (with insulating coating) coiling six circles that are 1mm φ by wire diameter are the coil of the solenoid type of 36mm φ, and resonance frequency is 17.2MHz (with reference to the sectional view of Figure 23).
In addition, power supply coil 1521 and the distance of power supply between resonator 1522 are set as to 5mm, by powering resonator 1522 and be subject to the distance between electric resonance device 1532 to be set as 18mm, will are subject to electric resonance device 1532 and are subject to the distance between electric coil 1531 to be set as 5mm.In addition, so that the coil surface of power supply resonator 1522 and the coil surface that is subject to electric resonance device 1532 in parallel with each other mode in opposite directions configure power supply resonator 1522 and be subject to electric resonance device 1532.
(structure of the wireless power transmission device 1600 that the 4th embodiment is related)
As shown in the sectional view of Figure 24, the wireless power transmission device 1600 using in the 4th embodiment possesses supply module 1602 and is subject to electric module 1603, wherein, this supply module 1602 possesses rounded power supply coil 1621, the power supply resonator 1622 of cylindrical shape and the magnetic component cylindraceous 1623 that covers the coil inner peripheral surface integral body of power supply resonator 1622, this is subject to electric module 1603 to possess the rounded electric coil 1631 that is subject to, the magnetic component cylindraceous 1633 that is subject to electric resonance device 1632 and covers the coil inner peripheral surface integral body that is subject to electric resonance device 1632 of cylindrical shape.And, with the 4th comparative example similarly, power supply coil 1621 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1631.In addition,, in the 4th embodiment, use three models (model A1, model A2, the model A3: details aftermentioned) measure of the diameter of the magnetic component cylindraceous 1623 that has changed the coil inner peripheral surface integral body that covers power supply resonator 1622.
With the first embodiment similarly, magnetic component 1623 and 1633 is formed by the resin that is dispersed with Magnaglo.And in model A1, as shown in figure 24, it is the drum that 46mm φ, thickness are 1mm that magnetic component 1623 is internal diameter, its magnetic permeability is 100.In model A2, as shown in figure 24, it is the drum that 37mm φ, thickness are 1mm that magnetic component 1623 is internal diameter, and its magnetic permeability is 100.In model A3, as shown in figure 24, it is the drum that 28mm φ, thickness are 1mm that magnetic component 1623 is internal diameter, and its magnetic permeability is 100.In addition, it is identical 28mm φ, the drum that thickness is 1mm that the magnetic component 1633 in model A1, model A2, model A3 is internal diameter, and its magnetic permeability is 100.In addition, power supply coil 1621, power supply resonator 1622, be subject to electric coil 1631, be subject to other structures such as electric resonance device 1632 wireless power transmission device 1500 related with the 4th comparative example identical.
(measurement result of the 4th comparative example and the 4th embodiment)
To using the measurement result of transmission characteristic " S21 " and the measurement result of the transmission characteristic " S21 " that the related wireless power transmission device 1600 of use the 4th embodiment is measured that the related wireless power transmission device 1500 of the 4th comparative example is measured to describe.
Use network analyser 110 while the frequency that changes the alternating electromotive force that is supplied to wireless power transmission device 1500, the transmission characteristic " S21 " of the related wireless power transmission device 1300 of the 4th comparative example to be measured.Similarly, while change the frequency of the alternating electromotive force that is supplied to wireless power transmission device 1600, the transmission characteristic " S21 " of the related wireless power transmission device 1600 of the 4th embodiment is measured to (respectively model A1, model A2, model A3 being measured).
Known according to the result of the measurement of the 4th comparative example, as shown in Figure 25 (A), the measured waveform 1541 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, the frequency representation of lower frequency side is fL.
On the other hand, known according to the result of the measurement of the model A1 of the 4th embodiment, as shown in Figure 25 (B), the measured waveform 1641A1 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.And the two all shows the value of transmission characteristic " S21 " of frequency f H of high frequency side of separated peak value and the value of the transmission characteristic " S21 " of the frequency f L of lower frequency side than the high value of the measured waveform of the 4th comparative example 1541 (with reference to (A) of Figure 25).
In addition, known according to the result of the measurement of the model A2 of the 4th embodiment, as shown in Figure 25 (C), the measured waveform 1641A2 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.And the two all shows the value of transmission characteristic " S21 " of frequency f H of high frequency side of separated peak value and the value of the transmission characteristic " S21 " of the frequency f L of lower frequency side than the high value of the measured waveform of the 4th comparative example 1541 (with reference to (A) of Figure 25).
In addition, known according to the result of the measurement of the model A3 of the 4th embodiment, as shown in Figure 25 (D), the measured waveform 1641A3 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.And the two all shows the value of transmission characteristic " S21 " of frequency f H of high frequency side of separated peak value and the value of the transmission characteristic " S21 " of the frequency f L of lower frequency side than the high value of the measured waveform of the 4th comparative example 1541 (with reference to (A) of Figure 25).
Thus, the power transmission efficiency of the known wireless power transmission device 1500 related with the 4th comparative example is compared, and the power transmission efficiency of the wireless power transmission device 1600 of the 4th embodiment improves.; known according to the measurement result of transmission characteristic " S21 "; even the power supply coil 1621 in supply module 1602 with power supply resonator 1622, be subject to being subject to electric coil 1631 and being subject to electric resonance device 1632 to use the different coil of coil diameter in electric module 1603; with at power supply resonator 1522, do not configure magnetic component 1623 with the inner peripheral surface side that is subject to electric resonance device 1532 and compare with 1633 wireless power transmission device 1500, need only be configured to as described above possess the structure of magnetic component 1623 and 1633 also can power transmission efficiency.
Then, use the homophase resonance mode of the related wireless power transmission device 1600 (model A1, model A2, model A3) of the homophase resonance mode of the related wireless power transmission device 1500 of 110 pairs of the 4th comparative examples of network analyser and the power transmission efficiency under anti-phase resonance mode and the 4th embodiment and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 26.Now, in the curve chart of Figure 26, the 4th comparative example, the 4th embodiment (model A1), the 4th embodiment (model A2), the 4th embodiment (model A3) are configured to transverse axis, power transmission efficiency [%] is recited as to the longitudinal axis.
As shown in figure 26, about the 4th comparative example, the power transmission efficiency under homophase resonance mode (fL) is 21.6% (with reference to Figure 26: ■ 1551) to the result of measuring.In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 22.3% (with reference to Figure 26: ● 1552).
On the other hand, about the 4th embodiment (model A1), the power transmission efficiency under homophase resonance mode (fL) is 88.5% (with reference to Figure 26: ■ 1651A1).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 87.6% (with reference to Figure 26: ● 1652A1).In addition, about the 4th embodiment (model A2), the power transmission efficiency under homophase resonance mode (fL) is 90.7% (with reference to Figure 26: ■ 1651A2).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 87.0% (with reference to Figure 26: ● 1652A2).In addition, about the 4th embodiment (model A3), the power transmission efficiency under homophase resonance mode (fL) is 92.9% (with reference to Figure 26: ■ 1651A3).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 87.0% (with reference to Figure 26: ● 1652A3).Like this, the known wireless power transmission device 1500 related with the 4th comparative example compared, and the power transmission efficiency of the wireless power transmission device 1600 of the 4th embodiment improves.; even the power supply coil 1621 in known supply module 1602 with power supply resonator 1622, be subject to being subject to electric coil 1631 and being subject to electric resonance device 1632 to use the different coil of coil diameter in electric module 1603; with at power supply resonator 1522, do not configure magnetic component 1623 with the inner peripheral surface side that is subject to electric resonance device 1532 and compare with 1633 wireless power transmission device 1500, according to the wireless power transmission device 1600 that possesses as described above magnetic component 1623 and 1633, also can improve power transmission efficiency.
(the 5th embodiment)
In above-mentioned wireless power transmission device 200 grades, to the distance A between power supply coil 21 and power supply resonator 22 is set as to 15mm, to be subject to electric coil 31 and be subject to the distance B between electric resonance device 32 to be set as 15mm, power supply resonator 22 and the situation that is subject to distance C between electric resonance device 32 to be set as 30mm are illustrated to (with reference to Fig. 2), but in the 5th embodiment, to by the distance A between power supply coil and the resonator of powering and be subject to electric coil and be subject to the distance B between electric resonance device to be set as 0mm, in the inner circumferential side of power supply resonator, dispose power supply coil, in the situation that disposed by the inner circumferential side of electric resonance device, described by the wireless power transmission device of electric coil.Specifically, by measuring transmission characteristic " S21 " and power transmission efficiency, to possessing to dispose power supply coil in the inner circumferential side of power supply resonator and dispose the supply module of magnetic component cylindraceous in the inner circumferential side of the coil of powering and dispose the wireless power transmission device 1700 (hereinafter referred to as the 5th comparative example) that is subject to electric coil and disposes the wireless power transmission device that is subject to electric module 1800 of magnetic component cylindraceous in the inner circumferential side that is subject to electric coil and do not configure magnetic component in the inner circumferential side that is subject to electric resonance device, describe.
(structure of the wireless power transmission device 1700 that the 5th comparative example is related)
As shown in figure 27, the wireless power transmission device 1700 using in the 5th comparative example possess power supply resonator 1722 inner circumferential side dispose power supply coil 1721 supply module 1702 and in the inner circumferential side that is subject to electric resonance device 1732, dispose the electric module 1703 that is subject to that is subject to electric coil 1731.And, with the first embodiment similarly, power supply coil 1721 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1731.
The following effect of power supply coil 1721 performance: the electric power obtaining from network analyser 110 is supplied to power supply resonator 1722 by electromagnetic induction.This power supply coil 1721 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby is the circle that internal diameter is 70mm φ.
Be subject to the following effect of electric coil 1731 performance: by electromagnetic induction, the input terminal 112 that is subject to the electric power of electric resonance device 1732 to output to network analyser 110 will be sent to magnetic field energy form from power supply resonator 1722.This is subject to electric coil 1731 is copper wire material (with insulating coating) coiling one circle of 1mm φ by wire diameter, thereby is the circle that internal diameter is 70mm φ.
Power supply resonator 1722 is respectively LC resonant circuit with being subject to electric resonance device 1732, the effect that performance creates magnetic field resonance condition.Power supply resonator 1722 and to be subject to electric resonance device 1732 be that the internal diameters of the coil that obtains of copper wire material (with insulating coating) coiling three circles that are 1mm φ by wire diameter are the coil of the solenoid type of 100mm φ, resonance frequency is 12.9MHz.
In addition, by power supply resonator 1722 and be subject to the distance between electric resonance device 1732 to be set as 30mm.
(structure of the wireless power transmission device 1800 that the 5th embodiment is related)
As shown in figure 28, the wireless power transmission device 1800 using in the 5th embodiment possesses supply module 1802 and is subject to electric module 1803, wherein, this supply module 1802 disposes power supply coil 1821 and disposes magnetic component 1823 cylindraceous in the inner circumferential side of power supply coil 1821 in the inner circumferential side of power supply resonator 1822, this is disposed in the inner circumferential side that is subject to electric resonance device 1832 by electric module 1803 to be subject to electric coil 1831 and in the inner circumferential side that is subject to electric coil 1831, to dispose magnetic component 1833 cylindraceous.And, with the 5th comparative example similarly, power supply coil 1821 be connected with the lead-out terminal 111 of network analyser 110, be connected with the input terminal 112 of network analyser 110 by electric coil 1831.
With the first embodiment similarly, magnetic component 1823 and 1833 is formed by the resin that is dispersed with Magnaglo.The drum that it is 60mm φ that this magnetic component 1823 and 1833 is internal diameter, be highly 1mm for 30mm, thickness, its magnetic permeability is 100.In addition, power supply coil 1821, power supply resonator 1822, be subject to electric coil 1831, be subject to other structures such as electric resonance device 1832 wireless power transmission device 1700 related with the 5th comparative example identical.
(measurement result of the 5th comparative example and the 5th embodiment)
To using the measurement result of transmission characteristic " S21 " and the measurement result of the transmission characteristic " S21 " that the related wireless power transmission device 1800 of use the 5th embodiment is measured that the related wireless power transmission device 1700 of the 5th comparative example is measured to describe.
Use network analyser 110 while the frequency that changes the alternating electromotive force that is supplied to wireless power transmission device 1700, the transmission characteristic " S21 " of the related wireless power transmission device 1700 of the 5th comparative example to be measured.Similarly, while change the frequency of the alternating electromotive force that is supplied to wireless power transmission device 1800 transmission characteristic " S21 " of the related wireless power transmission device 1800 of the 5th embodiment measured.
Known according to the result of the measurement of the 5th comparative example, as shown in Figure 29 (A), the measured waveform 1741 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.By separation peak value in the frequency representation of high frequency side be fH, the frequency representation of lower frequency side is fL.
On the other hand, known according to the result of the measurement of the 5th embodiment, as shown in Figure 29 (B), the measured waveform 1841 of measured transmission characteristic " S21 " is in the peak separation of lower frequency side and high frequency side.And the two all shows the value of transmission characteristic " S21 " of frequency f H of high frequency side of separated peak value and the value of the transmission characteristic " S21 " of the frequency f L of lower frequency side than the high value of the measured waveform of the 5th comparative example 1741 (with reference to (A) of Figure 29).Thus, the power transmission efficiency of the known wireless power transmission device 1700 related with the 5th comparative example is compared, and the power transmission efficiency of the wireless power transmission device 1800 of the 5th embodiment improves., known according to the measurement result of transmission characteristic " S21 ", even dispose power supply coil 1821 in the inner circumferential side of power supply resonator 1822, in the inner circumferential side that is subject to electric resonance device 1832, dispose and be subject to electric coil 1831, with power supply resonator 1722 and power supply with enclose 1721 and be subject to electric resonance device 1732 and the inner peripheral surface side that is subject to electric coil 1731 not to configure magnetic component 1823 to compare with 1833 wireless power transmission device 1700, as long as be configured to as described above in the inner circumferential side of power supply coil 1821 and configure magnetic component 1823 cylindraceous, the structure that configures magnetic component 1833 cylindraceous in the inner circumferential side that is subject to electric coil 1831 also can improve power transmission efficiency.
Then, use the homophase resonance mode of the related wireless power transmission device 1800 of the homophase resonance mode of the related wireless power transmission device 1700 of 110 pairs of the 5th comparative examples of network analyser and the power transmission efficiency under anti-phase resonance mode and the 5th embodiment and the power transmission efficiency under anti-phase resonance mode to measure.Its measurement result is shown in Figure 30.Now, in the curve chart of Figure 30, the 5th comparative example and the 5th embodiment are configured to transverse axis, power transmission efficiency [%] is recited as to the longitudinal axis.
As shown in figure 30, about the 5th comparative example, the power transmission efficiency under homophase resonance mode (fL) is 80.3% (with reference to Figure 30: ■ 1751) to the result of measuring.In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 49.0% (with reference to Figure 30: ● 1752).
On the other hand, about the 5th embodiment, the power transmission efficiency under homophase resonance mode (fL) is 92.1% (with reference to Figure 30: ■ 1851).In addition, the power transmission efficiency under anti-phase resonance mode (fH) be 72.6% (with reference to Figure 30: ● 1852).Like this, the known wireless power transmission device 1700 related with the 5th comparative example compared, and the power transmission efficiency of the wireless power transmission device 1800 of five embodiment improves.; known with at power supply resonator 1722, do not configure magnetic component 1823 with the inner peripheral surface side that is subject to electric resonance device 1732 and compare with 1833 wireless power transmission device 1700, according to the wireless power transmission device 1800 that possesses as described above magnetic component 1823 and 1833, can improve power transmission efficiency.
(execution mode)
Then, the example of applying flexibly of the wireless power transmission device of explanation is in the above-described embodiments described simply as execution mode.
For example, above-mentioned wireless power transmission device 200 has supply module 202 and is subject to electric module 203, wherein, this supply module 202 possesses power supply coil 21 and power supply resonator 22, this is subject to electric module 203 possess the electric coil of being subject to 31 and be subject to electric resonance device 32, so that the coil surface of this power supply resonator 22 configures power supply resonator 22 and is subject to electric resonance device 32 with the coil surface that is subject to electric resonance device 32 mode toward each other.In addition, in power supply resonator 22 and the coil inner peripheral surface side that is subject to electric resonance device 32, dispose respectively the magnetic component cylindraceous 23 and 33 that covers coil inner peripheral surface integral body.And, in this embodiment, be made as following structure: the lead-out terminal 111 that replaces network analyser 110, by AC power via being connected with the power supply coil 21 of supply module 202 to being supplied to the oscillating circuit that the frequency of the electric power of supply module 202 adjusts, the input terminal 112 that replaces network analyser 110, the rectification/stabilization circuit that rechargeable battery is carried out to rectification via the alternating electromotive force to received is connected with being subject to the electric coil 31 that is subject to of electric module 203 with the charging circuit that prevents from overcharging.
And, in the related wireless power transmission device 200 of present embodiment, oscillating circuit has been taken in inner circumferential side (inner circumferential side of magnetic component 23) at the power supply resonator 22 of supply module 202 sides, is being subject to the inner circumferential side that is subject to electric resonance device 32 (inner circumferential side of magnetic component 33) of electric module 203 sides to take in rectification/stabilization circuit.In addition, also charging circuit and rechargeable battery can be accommodated in to the inner circumferential side that is subject to electric resonance device 32 that is subject to electric module 203.
In the wireless power transmission device 200 forming as described above, the alternating electromotive force that is supplied to power supply coil 21 from AC power via oscillating circuit by power supply coil 21 with power supply the electromagnetic induction between resonator 22, utilized the resonator 22 and be subject to the wireless transmission of the resonance (magnetic field resonance condition) between electric resonance device 32 and be subject to electric resonance device 32 and be subject to the electromagnetic induction between electric coil 31 of powering, via rectification/stabilization circuit and charging circuit, be fed into rechargeable battery, and accumulated in rechargeable battery.And, when being subject to electric resonance device 32 to utilize the electric power of resonance to supply with from 22 pairs of resonators of power supply like this, compare with 33 situation with not configuring magnetic component 23, can make the power transmission efficiency of the electric power energy when being subject to electric module 203 to transmit electric power from supply module 202 improve.That is, the transmission loss in the time of can reducing wireless power transmission, thus can to rechargeable battery, charge efficiently.
In addition, in the above-described embodiment, magnetic component 23 and 33 is configured in to power supply resonator 22 and the inner peripheral surface side that is subject to electric resonance device 32, but also can be as the wireless power transmission device 300 of embodiment 2, be made as the structure that also configures magnetic component 24 and 34 in power supply resonator 22 and the outer peripheral face side that is subject to electric resonance device 32, can also, as the wireless power transmission device 400 of embodiment 3, be made as the structure that also configures magnetic component 25 and 35 in power supply resonator 22 and the side that is subject to electric resonance device 32.With the supply module 202 of made, the size that is subject to electric module 203, cost correspondingly allocation position, size, the shape of expedient decision magnetic component.
In addition, in above-described embodiment and execution mode, be made as at supply module and be subject to electric module both sides to be all provided with the structure of magnetic component 23 and 33, magnetic component 24 and 34, magnetic component 25 and 35, but only also can be made as at supply module or be subject to a side of electric module to configure the structure of above-mentioned magnetic component.
In addition, in above-described embodiment and execution mode, exemplified with by utilizing supply module and being subject to the power supply resonator that electric module possesses and being subject to the covibration between electric resonance device 32 to make magnetic Field Coupling carry out the technology (wireless power of magnetic field mode of resonance transmits) of wireless power transmission and be illustrated, but make magnetic field at supply module and be subject to change between electric module and carry out also comprising the wireless power tranmission techniques (for example, with reference to patent documentation 1) that the electromagnetic induction utilizing between coil carries out the electromagnetic induction type of electric power transmission in the technology of electric power transmission.In the situation that adopt the wireless power tranmission techniques of this electromagnetic induction type, magnetic component is configured in inner peripheral surface side, outer peripheral face side, the side of the coil of deriving electromagnetic induction.
In addition, in above-described embodiment and execution mode, with magnetic component, cover power supply resonator 22 and be subject to inner peripheral surface integral body, the whole mode of outer peripheral face of electric resonance device 32 to configure magnetic component, but may not cover inner peripheral surface integral body, outer peripheral face integral body, can be also the such structure of a part that magnetic component covers inner peripheral surface, outer peripheral face.
In above detailed explanation, in order more easily to understand the present invention, centered by distinctive part, be illustrated, but the present invention is not limited to the execution mode and the embodiment that in above detailed description, record, can also be applied to other execution mode and embodiment, be construed as its scope of application extensive as much as possible.In addition, the term using in this specification and grammer are used in order reliably the present invention to be described, and the explanation being not meant to limit the present invention is used.In addition, if those skilled in the art, the concept of the invention that probably can easily record from this specification is released other structure that concept of the present invention comprises, system, method etc.Thereby, should be considered as also comprising equal structure in scope that being documented in of claims do not depart from technological thought of the present invention.In addition, in order to fully understand object of the present invention and effect of the present invention, wish fully with reference to disclosed document etc.
description of reference numerals
21: power supply coil; 22: power supply resonator; 23: magnetic component; 31: be subject to electric coil; 32: be subject to electric resonance device; 33: magnetic component; 110: network analyser; 111: lead-out terminal; 112: input terminal; 200: wireless power transmission device; 202: supply module; 203: be subject to electric module.

Claims (6)

1. a wireless power transmission device, makes magnetic field at supply module and is subject to change and carry out electric power transmission between electric module, it is characterized in that,
Above-mentioned supply module and above-mentionedly possessed by electric module:
Coil; And
Magnetic component, it covers coil in above-mentioned supply module and above-mentioned at least a portion being subject to coil in electric module face in opposite directions.
2. wireless power transmission device according to claim 1, is characterized in that,
Above-mentioned magnetic component is to cover the coil in supply module and/or configured by the mode of the inner peripheral surface of the coil in electric module.
3. wireless power transmission device according to claim 1 and 2, is characterized in that,
Above-mentioned magnetic component is to cover the coil in supply module and/or configured by the mode of the outer peripheral face of the coil in electric module.
4. according to the wireless power transmission device described in any one in claim 1～3, it is characterized in that,
Above-mentioned magnetic component is to cover with respect to the coil in above-mentioned supply module and the above-mentioned mode of the face that coil in electric module face is in opposite directions opposition side that is subject to configure.
5. according to the wireless power transmission device described in any one in claim 1～4, it is characterized in that,
Coil from above-mentioned supply module is subject to the coil in electric module to utilize the electric power of covibration to transmit to above-mentioned.
6. wireless power transmission device according to claim 5, is characterized in that,
Coil in above-mentioned supply module is power supply coil and power supply resonator,
It is above-mentioned that to be subject to the coil in electric module be to be subject to electric coil and to be subject to electric resonance device,
By electromagnetic induction, the electric power that is transported to above-mentioned power supply coil is transported to above-mentioned power supply resonator, by making above-mentioned power supply resonator and the above-mentioned electric resonance device resonance that is subject to that the electric power that is transported to above-mentioned power supply resonator is sent to the above-mentioned electric resonance device that is subject to magnetic field energy form from above-mentioned power supply resonator, by electromagnetic induction, by being sent to the above-mentioned electric power of electric resonance device that is subject to, be transported to the above-mentioned electric coil that is subject to, carry out thus above-mentioned electric power transmission.
CN201380001945.9A 2012-04-17 2013-05-01 Wireless power transmission device Active CN103959604B (en)

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JP2012257524A JP6095957B2 (en) 2012-04-17 2012-11-26 Wireless power transmission device, power feeding device, and power receiving device
PCT/JP2013/062697 WO2014080647A1 (en) 2012-04-17 2013-05-01 Wireless power-transfer device

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