KR20150088714A - Method for forming magnetic field space - Google Patents

Abstract

The feed resonator 22 of the power feeding module 202 and the power receiving resonator 32 of the power receiving module 203 are opposed to each other and the power feeding resonator 22 is provided on the inner peripheral side of the coil of the power feeding resonator 22 and the power receiving resonator 32, And the cylindrical magnetic member 23 and 33 which cover the entire inner circumferential surface of the coil of the water receiving resonator 32 are arranged and power transmission is performed by changing the magnetic field between the power feeding resonator 22 and the water receiving resonator 32, The magnetic field generated in the vicinity of the feed resonator 22 and the water receiving resonator 32 is cut off by the magnetic member 23 · 33 and the inner peripheral surface of the coil of the power feed resonator 22 and the water receiver resonator 32, Thereby forming a magnetic field space Z having a smaller magnetic field intensity than the other magnetic field strengths.

Description

METHOD FOR FORMING MAGNETIC FIELD SPACE [0002]

The present invention relates to a method of forming a magnetic field space having a relatively small magnetic field intensity.

2. Description of the Related Art In recent years, electronic devices such as a notebook-type PC, a tablet-type PC, a digital camera, and a mobile phone that can be used while being carried by people are rapidly spreading. Most of these electronic devices are equipped with a rechargeable battery, and regular charging is required. In order to simplify the charging operation of the rechargeable battery of this electronic device, a power feeding technique using power transmission by radio between the power feeding device and the power receiving device mounted on the electronic device (a wireless power transmission technique ), There is an increasing number of devices for charging the rechargeable battery.

For example, as a wireless power transmission technique, there is a technique of performing power transmission using electromagnetic induction between coils (see, for example, Patent Document 1), and a resonance phenomenon between resonators (coils) (Refer to, for example, Patent Document 2).

On the other hand, electronic devices that can be used while being carried by a person, such as the notebook type PC, the tablet type PC, the digital camera, and the mobile phone, are required to be further downsized (compact) in order to improve portability.

Therefore, in order to make a compact electronic apparatus while adopting the wireless power transmission technology, a charging-related electronic component (for example, a rectifier, a rechargeable battery, etc.) Can be stored.

However, in the above-mentioned wireless power transmission technology, a magnetic field is generated around the coil used in the wireless power transmission technology. As a result, an eddy current caused by a magnetic field is generated in a charging-related electronic component such as a rectifier and a rechargeable battery housed in the inner circumference side (inside) of the coil, and heat is generated to adversely affect the charging-related electronic components such as a rectifier and a rechargeable battery have.

In order to solve the problem caused by the magnetic field, for example, Patent Document 3 discloses a power receiving apparatus for reducing the influence of magnetic flux by arranging a magnetic substance between a spiral coil and a rectifier of a power receiving apparatus provided with a rechargeable battery Lt; / RTI >

Japanese Patent No. 4624768 Japanese Patent Application Laid-Open No. 2010-239769 International Publication No. 2007/080820

Especially, in the electronic device 1 shown in Fig. 3 of Patent Document 3, the secondary battery 13 is housed inside. However, the circuit board 15 itself is disposed outside the power reception coil 11, It can not be said that it is. The secondary battery 13 accommodated in the power receiving coil 11 is connected to the power receiving coil 11 by the magnetic substance 16 disposed between the secondary battery 13 and the power receiving coil 11 16 of Patent Document 3, the magnetic thin body 16 is not employed on the side of the power feeding device 30, and when the power is transmitted, The secondary battery 13 is affected by the magnetic flux generated by the power supply coil 31 on the side of the power supply device 30 and therefore it is considered that the sufficient shielding effect of the magnetic flux against the secondary battery 13 is not obtained.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a power supply module and a power reception module, which are capable of preventing a magnetic field generated around a coil when a power is transmitted by changing a magnetic field between the coils in the power supply module and the power reception module, To thereby form a magnetic field space having a small magnetic field strength.

According to one aspect of the present invention for solving the above problems, there is provided a power supply module, comprising: a coil in a power supply module and a coil in a power reception module disposed opposite to each other; a magnetic member disposed to cover at least a part of a surface of the coil, Wherein the magnetic field space having a magnetic field strength smaller than that of the magnetic field strength at a desired position is formed at a desired position by performing electric power transmission by changing the magnetic field between the coil in the receiving module and the coil in the receiving module, .

According to this method, the magnetic member covers at least a part of the surface of the coil in the power supply module and the coil in the power reception module except the surface facing the coil, so that a magnetic field is generated between the coil in the power supply module and the coil in the power reception module. The magnetic field generated at the periphery of the coils in the power feeding module and the coils in the receiving module is blocked by the magnetic member so that the coils in the power feeding module and the receiving module are disposed at desired positions around the coils in the power feeding module It is possible to form a magnetic field space having a magnetic field intensity smaller than the magnetic field intensity other than the desired position.

Thus, the magnetic field space having a magnetic field intensity smaller than the magnetic field intensity other than the desired position can be formed at a desired position in the vicinity of the coil in the coil and the receiving module in the power supply module. For example, When a rectifier for rectifying AC power, a rechargeable battery for accumulating rectified DC power, an electronic device, or the like is accommodated in a magnetic field space having a relatively small magnetic field strength, generation of an eddy current caused by a magnetic field is suppressed, It is possible to prevent the charging, the electronic device, and the like from being heated.

By accommodating the rectifier, the rechargeable battery, the electronic device, and the like in a magnetic field space having a relatively small magnetic field strength, it is possible to reduce the size of the rectifier, the charging device, and the electronic device while preventing heat generation.

One of the inventions for solving the above problems is that in the method of forming the magnetic field space, the magnetic member is arranged so as to cover the inner peripheral surface of the coil in the coil and / or the power receiving module in the power supply module .

According to this method, the magnetic field generated on the inner circumferential side of the coil in the coil and / or the power receiving module in the power feeding module is cut off and the magnetic field strength of the coil in the power feeding module and / Can be formed.

According to another aspect of the present invention for achieving the above object, there is provided a method of forming the magnetic field space, characterized in that the magnetic member is disposed so as to cover the outer peripheral surface of the coil in the power supply module and / .

According to this method, the magnetic field generated at the outer peripheral side of the coils in the power supply module and / or the outer side of the coils in the power reception module is blocked, and the relatively small magnetic field strength Can be formed.

According to another aspect of the present invention for solving the above problems, there is provided a method of forming the magnetic field space, wherein the magnetic member is disposed so as to cover a face of the coil in the power supply module and a face opposite to the opposing face of the coil in the power reception module .

According to the above method, the magnetic field generated in the vicinity of the surface opposite to the opposing surface of the coils in the power feeding module and the coils in the receiving module is cut off, and the coils in the power feeding module and the coils in the receiving module, It is possible to form a magnetic field space having a relatively small magnetic field strength in the vicinity of the surface.

One of the inventions for solving the above problems is characterized in that in the method of forming the magnetic field space, the power transmission is performed by a resonance phenomenon from a coil in the power feeding module to a coil in the power receiving module .

According to the above method, by performing power transmission using a resonance phenomenon between coils, a magnetic field space having a magnetic field strength smaller than the magnetic field strength at the desired position in the vicinity of the coil in the coil and the receiving module in the power supply module is obtained .

According to another aspect of the present invention for achieving the above object, there is provided a method of forming the magnetic field space, wherein the coils in the power feeding module are a power feeding coil and a feeding resonator, and the coils in the power receiving module are a power receiving coil, Wherein power supplied to the power feeding coil is fed to the power feeding resonator by electromagnetic induction and power fed to the power feeding resonator is resonated between the power feeding resonator and the power receiving resonator to generate power from the power feeding resonator, And the power transmission is performed by feeding the power transmitted to the power reception resonator to the power reception coil by electromagnetic induction.

According to the above method, power transmission is performed by the magnetic field resonance method using the power supply coil and the power supply resonator, and the power reception coil and the power reception resonator, so that the power supply is made to a desired position around the power supply resonator and the power reception resonator, A magnetic field space having a magnetic field strength can be formed.

When the electric power is transmitted by changing the magnetic field between the coils in the power feeding module and the coils in the receiving module, the magnetic field generated around the coils is cut off and the magnetic field intentionally having a small magnetic field strength at a desired position around the coils Can be provided.

1 is a schematic explanatory view of a method of forming a magnetic field space.
2 is a configuration diagram of a wireless power supply system according to a comparative example.
3 is a graph showing the measurement result of the transmission characteristic S21 according to the comparative example.
4 is a magnetic field intensity distribution chart according to a comparative example.
5 is a configuration diagram of a wireless power supply system according to the first embodiment.
6 is a graph showing the measurement result of the transmission characteristic S21 according to the first embodiment.
7 is a magnetic field intensity distribution diagram according to the first embodiment.
8 is a configuration diagram of the wireless power supply system according to the second embodiment.
9 is a graph showing the measurement result of the transmission characteristic S21 according to the second embodiment.
10 is a magnetic field intensity distribution chart according to the second embodiment.
11 is a configuration diagram of the wireless power supply system according to the third embodiment.
12 is a graph showing the measurement result of the transmission characteristic S21 according to the third embodiment.
13 is a magnetic field intensity distribution diagram according to the third embodiment.
14 is a graph showing measurement results of the transmission characteristic S21 according to the fourth embodiment.
15 is a magnetic field intensity distribution diagram according to the fourth embodiment.
16 is a graph showing the measurement result of the transmission characteristic S21 according to the fifth embodiment.
17 is a magnetic field intensity distribution diagram according to the fifth embodiment.
18 is a configuration diagram of a wireless power supply system according to a second comparative example.
19 is a graph showing the measurement result of the transmission characteristic S21 according to the second comparative example.
20 is a magnetic field intensity distribution diagram according to the second comparative example.
21 is a configuration diagram of a wireless power supply system according to the second embodiment.
22 is a graph showing the measurement result of the transmission characteristic S21 according to the second embodiment.
23 is a magnetic field intensity distribution diagram according to the second embodiment.
24 is a configuration diagram of a wireless power supply system according to a third comparative example.
25 is a graph showing the measurement result of the transmission characteristic S21 according to the third comparative example.
26 is a magnetic field intensity distribution diagram according to the third comparative example.
27 is a configuration diagram of a wireless power supply system according to the third embodiment.
28 is a graph showing the measurement result of the transmission characteristic S21 according to the third embodiment.
29 is a magnetic field intensity distribution diagram according to the third embodiment.
30 is a configuration diagram of a wireless power supply system according to a fourth comparative example.
31 is a graph showing the measurement result of the transmission characteristic S21 according to the fourth comparative example.
32 is a configuration diagram of a wireless power supply system according to the fourth embodiment.
33 is a graph showing a measurement result of the transmission characteristic S21 according to the fourth embodiment and a magnetic field intensity distribution diagram.
34 is a graph showing the measurement result of the transmission characteristic S21 according to the fourth embodiment.
35 is a configuration diagram of a wireless power supply system according to a fifth comparative example.
36 is a graph showing the measurement result of the transmission characteristic S21 according to the fifth comparative example.
37 is a magnetic field intensity distribution diagram according to the fifth comparative example.
38 is a configuration diagram of the wireless power supply system according to the fifth embodiment.
39 is a graph showing the measurement result of the transmission characteristic S21 according to the fifth embodiment.
40 is a magnetic field intensity distribution diagram according to the fifth embodiment.
41 is a configuration diagram of the wireless power supply system according to the sixth embodiment, a graph showing measurement results of transmission characteristics S21, and a magnetic field intensity distribution diagram.
42 is an explanatory diagram of a wireless power supply system according to the second embodiment.

Hereinafter, a method of forming a magnetic field space according to the present invention will be described on the basis of embodiments and embodiments.

(summary)

The method of forming a magnetic field in accordance with the present invention is realized, for example, by a wireless power supply system 200 as shown in FIG. The wireless power supply system 200 includes a power supply module 202 having a power supply coil 21 and a power supply resonator 22 and a power reception module 203 having a power reception coil 31 and a power reception resonator 32 The power supply resonator 22 and the power reception resonator 32 are connected to the coil surface of the power supply resonator 22 and the power supply resonator 22. The power supply resonator 22 and the power reception resonator 32 are mainly composed of solenoid type coils, And the coils of the water receiving resonator 32 are arranged to face each other. A cylindrical magnetic member 23 covering the entire inner circumferential surface of the coil of the power feeding resonator 22 is disposed on the coil inner circumferential surface of the power feeding resonator 22. Likewise, a cylindrical magnetic member 33 covering the entire inner circumferential surface of the coil of the receiver resonator 32 is also disposed on the inner circumferential surface of the coil of the receiver resonator 32. The power supply coil 21 of the power supply module 202 and the output terminal 111 of the network analyzer 110 described later are connected by wiring so that AC power is supplied from the output terminal 111 to the power supply coil 21). The power reception coil 31 of the power reception module 203 and the input terminal 112 of the network analyzer 110 are connected by wiring so that the power inputted from the power reception coil 31 to the input terminal 112 can be measured . The power feeding is performed by changing the magnetic field from the power feeding resonator 22 of the power feeding module 202 to the power receiving resonator 32 of the power receiving module 203 by using the resonance phenomenon, The magnetic field generated in the vicinity of the coil inner peripheral surface side is shielded by the magnetic member 23 and the magnetic field generated in the vicinity of the coil inner peripheral surface of the power reception resonator 22 and the power receiving resonator 32 Thereby forming a magnetic field space Z having a smaller magnetic field intensity.

Here, the feed resonator 22 and the water receiver resonator 32 are, for example, resonators using coils, and spirals, solenoids, or loops can be used. The resonance phenomenon means that two or more coils are tuned at a resonance frequency. The arrangement of the coils and the coils opposite to each other means that the coil has a cross section in the radial direction of the coils and the coils are disposed so as not to be orthogonal to each other. The desired position is a space on the inner circumference side or the outer circumference side of the coil (power supply resonator 22) in the power supply module 202 or the coil (power reception resonator 32) in the power reception module 203 .

(Embodiment 1)

Next, the power supply resonator 22 of the power supply module 202 and the power reception resonator 32 of the power reception module 203 are arranged opposite to each other like the above-described wireless power supply system 200, The magnetic field strength Z and the like of the comparative example and the first to third embodiments are measured for the magnetic field space Z formed by the wireless power supply system in which the magnetic member is disposed so as to cover at least a part of the surface, do. Further, when the magnetic field intensity of the magnetic field space Z is measured, the measured values are measured using the wireless power supply systems 100, 200, 300, and 400 modified according to the comparative example and the first to third embodiments (Figs. 2, 5, 8 and 11).

Specifically, as a comparative example, with respect to the magnetic field space Z formed by the power supply module 102 shown in Fig. 2 and the wireless power supply system 100 having no magnetic member in the power reception module 103, The change in the magnetic field strength and the change in the transmission characteristic S21, which will be described later, are measured when the metal piece is inserted into the inner periphery of the coil of the water receiving resonator 32 and when no metal piece is inserted.

5, the power supply module 202 and the power reception module 203 are provided with a cylindrical magnetic member 23 (see Fig. 5) that covers the entire inner circumferential surface of the coil of the power supply resonator 22 and the power reception resonator 32, The magnetic field strength Z when the metal piece is inserted into the inner circumferential side of the coil of the power reception resonator 32 and the metal piece is not inserted with respect to the magnetic field space Z formed by the wireless power supply system 200 having the power supply system And the change of the transmission characteristic " S21 " are measured.

8, a cylindrical magnetic member 23 占 covering the entire inner circumferential surface of the coil of the power feeding resonator 22 and the power receiving resonator 32 is provided in the power receiving module 302 and the power receiving module 303 shown in Fig. 8, And a magnetic field space Z formed by a wireless power supply system 300 including a cylindrical magnetic member 24 and 34 covering the entire outer circumferential surface of the coil of the power feeding resonator 22 and the water receiving resonator 32, The change of the magnetic field strength and the change of the transmission characteristic "S21" are measured when the metal piece is inserted into the inner circumferential side of the coil of the water receiving resonator 32 and when no metal piece is inserted.

As a third embodiment, the power supply module 402 and the power reception module 403 shown in Fig. 11 are provided with a cylindrical magnetic member 23 (see Fig. 11) that covers the entire inner circumferential surface of the coil of the power supply resonator 22 and the power reception resonator 32 A cylindrical magnetic member 24 and 34 covering the entire outer circumferential surface of the coil of the power feeding resonator 22 and the power receiving resonator 32 and the coil facing surfaces of the power feeding resonator 22 and the water receiving resonator 32, A metal piece is provided on the inner circumferential side of the coil of the power reception resonator 32 with respect to the magnetic field space Z formed by the wireless power supply system 400 having the ring shaped magnetic member 25, The change of the magnetic field strength and the change of the transmission characteristic " S21 " when the metal piece is not inserted are measured.

(Configuration of Wireless Power Supply System 100 According to Comparative Example)

2, the wireless power supply system 100 used in the comparative example includes a power supply module 102 having a power supply coil 21 and a power supply resonator 22, And a power reception module 103 having a resonator 32. [

The power supply coil 21 is connected to the output terminal 111 of the network analyzer 110 (manufactured by Agilent Technologies, Inc.). An input terminal 112 of the network analyzer 110 is connected to the power reception coil 31. [ In the wireless power supply system 100 configured as described above, when power is supplied to the power feeding module 102, power is supplied from the power feeding resonator 22 to the power receiving resonator 32 by resonance phenomenon as magnetic field energy.

The network analyzer 110 enables AC power to be output from the output terminal 111 to the feed coil 21 at an arbitrary frequency. Further, the network analyzer 110 enables the power input from the power reception coil 31 to the input terminal 112 to be measurable. Further, the network analyzer 110 makes it possible to measure the transmission characteristic " S21 " shown in Fig. 3, which will be described later in detail.

The power feeding coil 21 serves to supply the power obtained from the network analyzer 110 to the power feeding resonator 22 by electromagnetic induction. The power feeding coil 21 is wound with a copper wire having a wire diameter of 1 mm phi (including an insulating coating) once, and the coil diameter is set to 100 mm phi.

The power reception coil 31 serves to output the power transmitted from the power feeding resonator 22 to the power reception resonator 32 as magnetic field energy to the input terminal 112 of the network analyzer 110 by electromagnetic induction. The power receiving coil 31 is wound with a copper wire (having an insulating coating) having a wire diameter of 1 mmφ once, and the coil diameter is set to 100 mmφ in the same manner as the power supply coil 21.

The feed resonator 22 and the water receiver resonator 32 are each an LC resonance circuit, and serve to create a magnetic field resonance state. In the present embodiment, the capacitor component of the LC resonance circuit is realized by a device, but both ends of the coil may be opened and realized by the stray capacitance. In this LC resonance circuit, when the inductance is L and the capacitor capacity is C, f determined by (Equation 1) is the resonance frequency.

... (Equation 1)

The feed resonator 22 and the water receiver resonator 32 are solenoid type coils each having a coil diameter of 100 mm phi obtained by winding a copper wire having a wire diameter of 1 mm phi (with insulating coating) three times. The feed resonator 22 and the water receiver resonator 32 have a resonance frequency of 13.0 MHz. The power supply resonator 22 and the power reception resonator 32 are arranged such that the coil surfaces of the power supply resonator 22 and the power reception resonator 32 are parallel to each other.

As described above, when the resonance frequency of the feed resonator 22 and the resonance frequency of the receiver resonator 32 are set to the same value (resonance), a magnetic resonance state is created between the feed resonator 22 and the receiver resonator 32 can do. Power can be transmitted from the feed resonator 22 to the receiver resonator 32 as magnetic field energy when the magnetic resonance state is generated in the state where the feed resonator 22 and the receiver receiver resonate.

The distance A between the power feeding coil 21 and the feeding resonator 22 is set to 15 mm and the distance B between the power receiving coil 31 and the power receiving resonator 32 is set to 15 mm, The distance C between the feed resonator 22 and the receiver resonator 32 is set to 30 mm (see FIG. 2).

In the comparative example and the first to third embodiments, when measuring the magnetic field strength and the transmission characteristic " S21 ", the metal piece to be inserted into the inner circumferential side of the coil of the receiver resonator 32 is a circle having a thickness of 20 mm and a diameter of 76 mm An aluminum piece 60 made of aluminum is used. In Example 4 and Example 5, a circular aluminum piece 60 having a thickness of 20 mm and a diameter of 58 mmφ is used.

(Measurement result of the comparative example)

When the aluminum piece 60 is inserted into the inner peripheral side of the coil of the receiving resonator 32 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 100 according to the comparative example, And the measurement result of the change in the magnetic field strength and the change in the transmission characteristic "S21", which will be described later, will be described. The measurement of the strength of the magnetic field in the magnetic field space Z is performed by using an electromagnetic field analysis, and the intensity of the magnetic field is measured in a color tone.

First, using the network analyzer 110, in the wireless power supply system 100 according to the comparative example, when the aluminum piece 60 is not inserted on the inner circumferential side of the coil of the receiver resonator 32, the transmission characteristic " S21 Is measured while changing the frequency of the AC power supplied to the wireless power supply system 100. [ At this time, as shown in the graph of Fig. 3, the abscissa represents the frequency of the AC power output from the output terminal 111, and the ordinate represents the transmission characteristic " S21 ".

Here, the transmission characteristic " S21 " indicates a signal passing through the input terminal 112 when a signal is input from the output terminal 111, and is expressed in decibels. The larger the value, the higher the transmission efficiency. The transmission efficiency is a ratio of the power output from the output terminal 111 to the input terminal 112 to the power supplied from the output terminal 111 to the power feeding module while the wireless power supply system 101 is connected to the network analyzer 110 . That is, the higher the transmission characteristic " S21 ", the higher the transmission efficiency.

As a result of the measurement, as shown in Fig. 3, the measured waveform 141 of the measured transmission characteristic " S21 " separates the peak from the low frequency side and the high frequency side. Among the separated peaks, the frequency on the high frequency side is denoted by fH and the frequency on the low frequency side is denoted by fL.

When the frequency of the alternating-current power supplied to the power feeding module 102 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode), the power feeding resonator 22 and the power receiving resonator 32 are in the same phase So that the direction of the current flowing in the feed resonator 22 and the direction of the current flowing in the receiver resonator 32 are in the same direction.

Fig. 4 (A) shows the distribution of the magnetic field intensity in this in-phase resonance mode. From the magnetic field intensity distribution shown in Fig. 4 (A), the influence of the magnetic field is reduced on the outer peripheral side of the power feeding resonator 22 and the water receiving resonator 32, and the magnetic field space Z151 having a relatively small magnetic field intensity is confirmed . Here, a resonance state in which the direction of the current flowing in the coil (power supply resonator 22) in the power feeding module and the direction of the current flowing in the coil (receiving resonator 32) in the receiving module are the same direction is referred to as a common- .

On the other hand, when the frequency of the alternating-current power to be supplied to the power feeding module 102 is set to the frequency fH near the peak on the high frequency side (reverse phase resonance mode), the power feeding resonator 22 and the power receiving resonator 32 The direction of the current flowing in the feed resonator 22 and the direction of the current flowing in the water receiver resonator 32 are reversed. The magnetic field intensity distribution in this reverse phase resonance mode is shown in Fig. 4 (B). From the magnetic field intensity distribution shown in Fig. 4B, the influence of the magnetic field is reduced on the inner circumferential side of the feed resonator 22 and the water receiving resonator 32, and the magnetic field space Z153 having a relatively small magnetic field strength is confirmed . Here, the resonance state in which the direction of the current flowing in the coil (power supply resonator 22) in the power supply module and the direction of the current flowing in the coil (power reception resonator 32) in the power reception module are opposite to each other is referred to as a reverse- do.

S21 " at the time when the aluminum piece 60 is inserted into the coil inner circumferential side of the receiver resonator 32 in the wireless power supply system 100 according to the comparative example to the wireless power supply system 100, While changing the frequency of the alternating-current power supplied to the battery.

The measurement result is shown in Fig. 3 as the measurement waveform 142 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. Fig. The transmission characteristic S21 at the frequency fL near the peak on the low frequency side in the measurement waveform 142 is the transmission characteristic S21 when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 32 Is significantly lower than the measured waveform 141 of the characteristic " S21 ". Similarly, the transmission characteristic " S21 " at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic " S21 " when the aluminum piece 60 is not inserted on the coil inner periphery side of the receiver resonator 32 (141).

4 (C) shows the distribution of the magnetic field intensity in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. FIG. 4 (D) shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. As described above, in the wireless power supply system 100 according to the comparative example, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 32 is determined by the influence of the aluminum piece 60 You can see that you are receiving it directly. In other words, it can be seen that the aluminum piece 60 is directly influenced by the magnetic field generated in the wireless power supply system 100.

(Configuration of Wireless Power Supply System 200 according to Embodiment 1)

5, the wireless power supply system 200 used in the first embodiment has a cylindrical shape covering the entire inner circumferential surface of the coil of the power supply coil 21, the power supply resonator 22 and the power supply resonator 22 And a cylindrical magnetic member 33 covering the entire inner circumferential surface of the coil of the power reception coil 31, the power reception resonator 32 and the power reception resonator 32. The power supply module 202 includes a magnetic member 23 And a water receiving module 203 are provided. The output terminal 111 of the network analyzer 110 is connected to the power feeding coil 21 and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 31 as in the comparative example .

The magnetic members 23 and 33 are formed of a resin in which magnetic powders are dispersed. The resin used for the magnetic member 23 占 3 may be a thermosetting resin or a thermoplastic resin and is not particularly limited. Examples of the thermosetting resin include an epoxy resin, a phenol resin, a melamine resin, a vinyl ester resin, a cyanoester resin, a maleimide resin, and a silicone resin. Examples of the thermoplastic resin include an acrylic resin, a vinyl acetate resin, and a polyvinyl alcohol resin. In this embodiment, a resin mainly composed of an epoxy resin is used.

A soft magnetic powder is used for the magnetic powder dispersed in the resin. Examples of the soft magnetic powder include, but are not limited to, pure Fe, Fe-Si, Fe-Al-Si (Sendust), Fe-Ni (permalloy), soft ferrite, Fe group amorphous, Etc.) can be used.

The magnetic member 23 · 33 has a cylindrical shape with a thickness of 1 mm, an outer diameter of 80 mmφ, and an inner diameter of 78 mm, and the permeability thereof is set to 100. The rest of the configuration is the same as that of the wireless power supply system 100 according to the comparative example.

(Measurement result of Example 1)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 32 and when the aluminum piece 60 is inserted in the magnetic field space Z formed by the wireless power supply system 200 according to the first embodiment, The measurement result of the change of the magnetic field strength and the change of the transmission characteristic " S21 " when not inserted is described.

First, by using the network analyzer 110, in the wireless power supply system 200 according to the first embodiment, when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 32, S21 " is measured while changing the frequency of the alternating-current power supplied to the wireless power supply system 200. [

As a result of the measurement, as shown in Fig. 6, the measured waveform 241 of the measured transmission characteristic " S21 " has a peak separated from the low frequency side and the high frequency side.

7 (A) shows the magnetic field intensity distribution when the frequency of the AC power to be supplied to the power supply module 202 is set to the frequency fL near the peak at the low frequency side (in-phase resonance mode) . From the magnetic field intensity distribution shown in Fig. 7A, the influence by the magnetic field is reduced on the outer peripheral side of the power feeding resonator 22 and the water receiving resonator 32, and the magnetic field space Z251 having a relatively small magnetic field intensity is confirmed . It is also possible to confirm the magnetic field space Z252 on the inner circumferential side of the power feeding resonator 22 and the water receiving resonator 32 with the magnetic field strength slightly reduced by the magnetic field. In this manner, in the in-phase resonance mode, the magnetic field space Z252 having a smaller magnetic field intensity than the comparative example can be formed on the inner circumferential side of the feed resonator 22 and the receiver resonator 32. [

On the other hand, FIG. 7 (B) shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power feeding module 202 is set to the frequency fH near the peak on the high frequency side (reverse phase resonance mode). From the magnetic field intensity distribution shown in Fig. 7B, the influence of the magnetic field is reduced on the inner circumferential side of the power feeding resonator 22 and the water receiving resonator 32, and the magnetic field space Z253 having a relatively small magnetic field strength is confirmed . In this way, in the reverse phase resonance mode, the magnetic field space Z253 having a smaller magnetic field intensity than that of the comparative example can be formed on the inner circumferential side of the feed resonator 22 and the receiver resonator 32. [ In addition, the magnetic field space Z253 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z252 formed in the in-phase resonance mode.

S21 " obtained when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32 in the wireless power supply system 200 according to the first embodiment is referred to as the wireless power supply system 200 ) While changing the frequency of the alternating-current power supplied to the battery.

The measurement result is shown in Fig. 6 as the measurement waveform 242 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. Fig. In this measurement waveform 242, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak at the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 32 It can be seen that the value of the transmission characteristic is maintained at a high value although it is slightly lower than that of the measurement waveform 241 of the characteristic " S21 ". On the other hand, the transmission characteristic "S21" at the frequency fH in the vicinity of the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 32 (See point P in Fig. 6).

7 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. 7 (D) shows the distribution of the magnetic field strength in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. FIG. As described above, in the wireless power supply system 200 according to the first embodiment, the magnetic field strength distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 32 is smaller than that of the aluminum piece 60) is not much affected. That is, when the power is transmitted between the power feeding module 202 and the power receiving module 203, the magnetic field generated in the vicinity of the power feeding resonator 22 and the power receiving resonator 32 is cut off by the magnetic member 23 · 33 A magnetic field space Z253 larger than the magnetic field space Z153 of the comparative example can be formed on the coil inner circumferential side of the feed resonator 22 and the water receiving resonator 32. [ It can be said that the influence of the magnetic field generated in the wireless power supply system 200 is reduced with respect to the aluminum piece 60.

(Configuration of Wireless Power Supply System 300 according to Embodiment 2)

8, the wireless power supply system 300 used in the second embodiment includes a power supply coil 21, a power supply resonator 22, a cylindrical resonator 22, A power feeding module 302 having a cylindrical magnetic member 24 covering the whole of the outer circumferential surface of the coil of the power feeding resonator 22 and the magnetic member 23 of the power receiving coil 23 and the power receiving resonator 22, And a receiving module (303) having a cylindrical magnetic member (33) covering the entire inner circumferential surface of the coil (32) and a cylindrical magnetic member (34) covering the entire outer circumferential surface of the coil of the receiving resonator (32). The output terminal 111 of the network analyzer 110 is connected to the power feeding coil 21 and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 31 as in the first embodiment have.

The magnetic member 24 · 34 is formed of a resin in which magnetic powder is dispersed, like the magnetic member 23 · 33 in the first embodiment. The magnetic member 24 · 34 has a cylindrical shape with a thickness of 1 mm, an outer diameter of 120 mm and an inner diameter of 118 mm, and the permeability thereof is set to 100. The other configuration is the same as that of the wireless power supply system 200 according to the first embodiment.

(Measurement result of Example 2)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 32 and when the aluminum piece 60 is inserted in the magnetic field space Z formed by the wireless power supply system 300 according to the second embodiment, The measurement result of the change of the magnetic field strength and the change of the transmission characteristic " S21 " when not inserted is described.

First, in the wireless power supply system 300 according to the second embodiment, using the network analyzer 110, the transmission characteristics "when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 32 S21 " are measured while changing the frequency of the AC power supplied to the wireless power supply system 300. [

As a result of the measurement, as shown in Fig. 9, the measured waveform 341 of the measured transmission characteristic "S21" is separated from the peak on the low frequency side and on the high frequency side.

10 (A) shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power supply module 302 is set to the frequency fL near the peak at the low frequency side (in-phase resonance mode) . 10A, the magnetic field space Z352 having the magnetic field intensity slightly reduced in the influence of the magnetic field can be confirmed on the inner peripheral side of the feed resonator 22 and the reception resonator 32 from the magnetic field intensity distribution in FIG. 10A . As described above, in the in-phase resonance mode, the magnetic field space Z352 having a small magnetic field strength as compared with the comparative example can be formed on the inner circumferential side of the feed resonator 22 and the receiver resonator 32. [

On the other hand, FIG. 10B shows the magnetic field intensity distribution when the frequency of the AC power to be supplied to the power supply module 302 is set to the frequency fH near the peak on the high frequency side (reverse phase resonance mode). From the magnetic field intensity distribution shown in Fig. 10B, the influence of the magnetic field is reduced on the inner circumferential side of the feed resonator 22 and the water receiving resonator 32, and the magnetic field space Z353 having a comparatively small magnetic field strength is confirmed . Thus, in the reverse-phase resonance mode, the magnetic field space Z353 having a smaller magnetic field strength than that of the comparative example can be formed on the inner circumferential side of the feed resonator 22 and the receiver resonator 32. [ The magnetic field space Z353 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z352 formed in the in-phase resonance mode.

S21 " at the time when the aluminum piece 60 is inserted into the coil inner circumferential side of the receiver resonator 32 in the wireless power supply system 300 according to the second embodiment is referred to as the wireless power supply system 300 ) While changing the frequency of the alternating-current power supplied to the battery.

The measurement result is shown in Fig. 9 as the measurement waveform 342 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. [ In the measurement waveform 342, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak at the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 32 Is slightly lower than that of the measurement waveform 341 of the characteristic " S21 ", but the value of the transmission characteristic is maintained at a high value. On the other hand, the transmission characteristic "S21" at the frequency fH in the vicinity of the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 32 (See point P in Fig. 9).

10 (C) shows the distribution of the magnetic field strength in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. FIG. 10 (D) shows the distribution of the magnetic field strength in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. FIG. As described above, in the wireless power supply system 300 according to the second embodiment, the magnetic field strength distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 32 is larger than that of the aluminum piece 60) is not much affected. That is, when power is transmitted between the power feeding module 302 and the power receiving module 303, the magnetic field generated in the vicinity of the power feeding resonator 22 and the power receiving resonator 32 is transmitted to the magnetic member 23, The magnetic field space Z353 larger than the magnetic field space Z153 of the comparative example can be formed on the inner circumferential side of the coil of the power supply resonator 22 and the power reception resonator 32 by interrupting the magnetic field space Z353. It can be said that the influence of the magnetic field generated in the wireless power supply system 300 for the aluminum piece 60 is reduced.

The magnetic field space Z353 formed by the wireless power supply system 300 according to the second embodiment is larger than the magnetic field space Z253 formed by the wireless power supply system 200 according to the first embodiment Able to know. This is because the wireless power supply system 300 according to the second embodiment is provided with the cylindrical magnetic member 24 and 34 covering the entire outer circumferential surface of the coil of the power feeding resonator 22 and the power receiving resonator 32, And the magnetic field generated on the outer peripheral side of the receiving resonator 22 and the receiving resonator 32 is blocked.

(Configuration of Wireless Power Supply System 400 according to Embodiment 3)

11, the wireless power supply system 400 used in the third embodiment includes the power supply coil 21, the power supply resonator 22, the coil of the power supply coil 21, and the coil of the power supply resonator 22, The cylindrical magnetic member 23 covering the entire inner peripheral surface and the cylindrical magnetic member 24 covering the entire outer circumferential surface of the coil of the power feeding resonator 22 and the coil opposing surfaces of the power feeding resonator 22 A power feeding module 402 including a ring-shaped magnetic member 25 covering the opposite side surface of the power receiving module 40; A cylindrical magnetic member 34 covering the entire outer circumferential surface of the coil of the power reception coil 31 and the power reception resonator 32 and a cylindrical magnetic member 34 covering the entire surface of the power reception resonator 32 on the side opposite to the coil- And a power reception module 403 having a ring-shaped magnetic member 35 covering the side surface. The output terminal 111 of the network analyzer 110 is connected to the power feeding coil 21 and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 31 as in the second embodiment have.

The magnetic member 25 · 35 is formed of a resin in which magnetic powder is dispersed, like the magnetic member 23 · 33 in the first embodiment. The magnetic member 25 · 35 has an O-ring shape with a thickness of 1 mm, an outer diameter of 120 mm, and an inner diameter of 80 mm, and the permeability thereof is set to 100. The rest of the configuration is the same as that of the wireless power supply system 300 according to the second embodiment.

(Measurement result of Example 3)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 32 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 400 according to the third embodiment, The measurement result of the change of the magnetic field strength and the change of the transmission characteristic " S21 " when not inserted is described.

First, in the wireless power supply system 400 according to the third embodiment, using the network analyzer 110, the transmission characteristics "when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the power reception resonator 32 S21 " are measured while changing the frequency of the AC power supplied to the wireless power supply system 400. [

As a result of the measurement, as shown in Fig. 12, the measured waveform 441 of the measured transmission characteristic "S21" is separated from the low-frequency side and the high-frequency side.

13A shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power feeding module 402 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode) . From the magnetic field intensity distribution in FIG. 13A, it is possible to confirm the magnetic field space Z452 having the magnetic field intensity whose influence by the magnetic field is slightly reduced on the inner peripheral side of the feed resonator 22 and the water receiving resonator 32 . As described above, in the in-phase resonance mode, the magnetic field space Z452 having a smaller magnetic field intensity than that of the comparative example can be formed on the inner circumferential side of the feed resonator 22 and the receiver resonator 32. [

On the other hand, FIG. 13B shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power supply module 402 is set to the frequency (fH) near the peak on the high frequency side (reverse phase resonance mode). From the magnetic field intensity distribution shown in FIG. 13 (B), the influence of the magnetic field is reduced on the inner peripheral side of the feed resonator 22 and the water receiving resonator 32 to confirm the magnetic field space Z453 having a relatively small magnetic field intensity . In this way, in the reverse phase resonance mode, the magnetic field space Z453 having a smaller magnetic field intensity than that of the comparative example can be formed on the inner circumferential side of the feed resonator 22 and the receiver resonator 32. [ In addition, the magnetic field space Z453 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z452 formed in the in-phase resonance mode.

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32 in the wireless power supply system 400 according to the third embodiment, ) While changing the frequency of the alternating-current power supplied to the battery.

The measurement result is shown in Fig. 12 as the measurement waveform 442 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiver resonator 32. Fig. In this measurement waveform 442, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak on the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 32 Is substantially the same as that of the measured waveform 441 of the characteristic " S21 ". The transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner radius side of the coil of the receiver resonator 32 (See point P in Fig. 12).

13 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. As shown in Fig. 13 (D) shows the distribution of the magnetic field strength in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. FIG. As described above, in the wireless power supply system 400 according to the third embodiment, the magnetic field strength distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the receiver resonator 32 is smaller than that of the aluminum piece 60) is not much affected. That is, when the power transmission is performed between the power feeding module 402 and the power receiving module 403, the magnetic field generated in the vicinity of the power feeding resonator 22 and the power receiving resonator 32 is divided into the magnetic members 23 and 33, The magnetic field space Z453 larger than the magnetic field space Z153 of the comparative example is provided on the inner circumferential side of the coil of the power feeding resonator 22 and the power receiving resonator 32, ) Can be formed. It can be said that the influence of the magnetic field generated in the wireless power supply system 400 for the aluminum piece 60 is reduced.

It should be noted that the magnetic field space Z453 formed by the wireless power supply system 400 according to the third embodiment is larger than the magnetic field space Z353 formed by the wireless power supply system 300 according to the second embodiment Able to know. This is because the wireless power supply system 400 according to the third embodiment is provided with the power supply resonator 22 and the magnetic members 25 and 35 covering the side surfaces of the power reception resonator 32. The power supply resonator 22, This is because the magnetic field generated on the side surface of the resonator 32 is blocked.

(A change in the magnetic field space Z with a change in the thickness of the magnetic member)

Next, the variation of the magnetic field space Z when the thickness of the magnetic member 23 · 33 is increased will be described by measuring the magnetic field strength and transmission characteristic "S21" in the fourth and fifth embodiments.

(Configuration of the wireless power supply system 500 according to the fourth embodiment)

Specifically, the wireless power supply system 500 according to the fourth embodiment is the same as the wireless power supply system 200 according to the first embodiment except that the magnetic member 23, 33 in the wireless power supply system 200 according to the first embodiment has the thickness of 1 mm to 10 mm 123 占 133) (see Fig. 15), and the other structures are the same as those in the first embodiment. When the aluminum piece 60 is inserted into the inner peripheral side of the coil of the receiving resonator 32 and the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 500 The change of the magnetic field strength and the change of the transmission characteristic " S21 " are measured.

(Measurement result of Example 4)

First, in the wireless power supply system 500 according to the fourth embodiment, using the network analyzer 110, the transmission characteristics "when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the power reception resonator 32 S21 " is measured while changing the frequency of the AC power supplied to the wireless power supply system 500. [

As a result of the measurement, as shown in Fig. 14, the measured waveform 541 of the measured transmission characteristic "S21" separates the peak from the low frequency side and the high frequency side.

15 (A) shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power feeding module 502 is set to the frequency fL near the peak at the low frequency side (in-phase resonance mode) . 15A, the magnetic field space Z552 having the magnetic field strength whose influence by the magnetic field is reduced can be confirmed on the inner circumferential side of the power supply resonator 22 and the water receiving resonator 32. As shown in Fig. In the wireless power supply system 500 according to the fourth embodiment, the wireless power supply system 200 according to the first embodiment is provided on the inner circumferential side of the power supply resonator 22 and the power reception resonator 32 in the in- A wider magnetic field space Z552 than the magnetic field space Z252 can be formed. This is because in the wireless power supply system 500 according to the fourth embodiment, the power supply resonator 22 and the magnetic members 123 and 133 covering the inner circumferential surfaces of the power reception resonator 32 are thicker than those in the first embodiment, This is because the magnetic field generated on the inner peripheral surface side of the resonator 22 and the water receiving resonator 32 is blocked more reliably.

On the other hand, FIG. 15 (B) shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power feeding module 502 is set to the frequency (fH) near the peak on the high frequency side (reverse phase resonance mode). From the magnetic field intensity distribution in Fig. 15B, the influence of the magnetic field is reduced on the inner peripheral side of the feed resonator 22 and the water receiving resonator 32, and the magnetic field space Z553 having a relatively small magnetic field strength is confirmed . As described above, in the reverse-phase resonance mode, the inner space of the feed resonator 22 and the receiver resonator 32 is provided with a wider magnetic field space Z253 than the magnetic field space Z253 formed by the wireless power supply system 200 according to the first embodiment. (Z553) can be formed. This is because in the wireless power supply system 500 according to the fourth embodiment, the power supply resonator 22 and the magnetic members 123 and 133 covering the inner circumferential surfaces of the power reception resonator 32 are thicker than those in the first embodiment, This is because the magnetic field generated on the inner peripheral surface side of the resonator 22 and the water receiving resonator 32 is blocked more reliably. In addition, the magnetic field space Z553 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z552 formed in the in-phase resonance mode.

S21 " obtained when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32 in the wireless power supply system 500 according to the fourth embodiment is referred to as the wireless power supply system 500 ) While changing the frequency of the alternating-current power supplied to the battery.

The measurement result is shown in Fig. 14 as the measurement waveform 542 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. In this measurement waveform 542, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak on the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 32 Quot; S21 " is substantially the same as that of the measured waveform 541 (see point P1 in Fig. 14). The transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner radius side of the coil of the receiver resonator 32 (See point P2 in Fig. 14).

15 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. In Fig. 15 (D) shows the distribution of the magnetic field strength in the reverse phase resonance mode when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 32. As described above, in the wireless power supply system 500 according to the fourth embodiment, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner circumferential side of the coil of the power reception resonator 32 is smaller than that of the aluminum piece It can be seen that it is hardly influenced by the magnetic field 60. That is, when the thickness of the magnetic members 123 and 133 covering the inner surfaces of the power feeding resonator 22 and the water receiving resonator 32 is increased, when power is transmitted between the power feeding module 502 and the water receiving module 503, A relatively large magnetic field space Z552 and Z553 can be formed on the coil inner circumferential side of the feed resonator 22 and the water receiving resonator 32. [

(Configuration of Wireless Power Supply System 600 according to Embodiment 5)

Specifically, the wireless power supply system 600 according to the fifth embodiment is the same as the wireless power supply system 300 according to the second embodiment except that the magnetic member 23, 33 in the wireless power supply system 300 according to the second embodiment has a thickness of 1 mm to 10 mm 123) 133 (see Fig. 17), and the other configuration is the same as that of the second embodiment. When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 32 and the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 600 The change of the magnetic field strength and the change of the transmission characteristic " S21 " are measured.

(Measurement result of Example 5)

First, by using the network analyzer 110, in the wireless power supply system 600 according to the fifth embodiment, when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 32, S21 " is measured while changing the frequency of the AC power supplied to the wireless power supply system 600. [

As a result of the measurement, as shown in Fig. 16, the measured waveform 641 of the measured transmission characteristic "S21" is separated from the peak on the low frequency side and on the high frequency side.

17A shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power supply module 602 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode) . From the magnetic field intensity distribution shown in Fig. 17A, the magnetic field space Z652 having the magnetic field strength whose influence by the magnetic field is reduced can be confirmed on the inner periphery side of the power supply resonator 22 and the water receiving resonator 32. [ In the wireless power supply system 600 according to the fifth embodiment, the wireless power supply system 300 according to the second embodiment is provided on the inner circumferential side of the power supply resonator 22 and the power reception resonator 32 in the in- It is possible to form a wider magnetic field space Z652 than the magnetic field space Z352 to be formed. This is because in the wireless power supply system 600 according to the fifth embodiment, the power supply resonator 22 and the magnetic members 123 and 133 covering the inner circumferential surfaces of the power reception resonator 32 are thicker than those in the second embodiment, This is because the magnetic field generated on the inner peripheral surface side of the resonator 22 and the water receiving resonator 32 is blocked more reliably.

On the other hand, FIG. 17B shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power supply module 602 is set to the frequency (fH) near the peak on the high frequency side (reverse phase resonance mode). From the magnetic field intensity distribution shown in Fig. 17B, the influence of the magnetic field is reduced on the inner peripheral side of the power feeding resonator 22 and the water receiving resonator 32, and the magnetic field space Z653 having a relatively small magnetic field strength is confirmed . As described above, in the reverse phase resonance mode, on the inner circumferential side of the feed resonator 22 and the receiver resonator 32, a larger magnetic field space Z353 than the magnetic field space Z353 formed by the wireless power supply system 300 according to the second embodiment (Z653) can be formed. This is because in the wireless power supply system 600 according to the fifth embodiment, the power supply resonator 22 and the magnetic members 123 and 133 covering the inner circumferential surfaces of the power reception resonator 32 are thicker than those in the second embodiment, This is because the magnetic field generated on the inner peripheral surface side of the resonator 22 and the water receiving resonator 32 is blocked more reliably. In addition, the magnetic field space Z653 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z652 formed in the in-phase resonance mode.

S21 " when the aluminum piece 60 is inserted into the inner circumferential side of the coil of the water receiving resonator 32 in the wireless power supply system 600 according to the fifth embodiment is set to the wireless power supply system 600 ) While changing the frequency of the alternating-current power supplied to the battery.

The measurement result is shown in Fig. 16 as the measurement waveform 642 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumference side of the water receiving resonator 32. In this measurement waveform 642, the transmission characteristic "S21" at the frequency fL in the vicinity of the peak on the low-frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner circumferential side of the receiver resonator 32 Quot; S21 " holds substantially the same value as the measured waveform 641 (see point P1 in Fig. 16). The transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner radius side of the coil of the receiver resonator 32 (See point P2 in Fig. 16).

17 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 32. [ 17 (D) shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 32. As described above, in the wireless power supply system 600 according to the fifth embodiment, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the receiver resonator 32 is smaller than that of the aluminum piece It can be seen that it is hardly influenced by the magnetic field 60. That is, when the thickness of the magnetic members 123 and 133 covering the inner surfaces of the feed resonator 22 and the water receiver resonator 32 is increased, when power is transmitted between the power feed module 602 and the water receiver module 603, A relatively large magnetic field space (Z652 Z653) can be formed on the coil inner circumferential side of the feed resonator (22) and the water receiving resonator (32).

(Second Embodiment)

In the above-mentioned wireless power supply systems (100, 200, 300, 400), when circular and solenoid cylindrical coils are used for the power supply coil and the feed resonator in the power supply module and the power reception coil and the power reception resonator in the power reception module In the second embodiment, in the case of using a quadrangular-shaped and quadrangular columnar cylindrical coil for the power supply coil and the feed resonator in the power supply module, the power reception coil and the power reception resonator in the power reception module, System will be described. Specifically, the power supply resonator of the power supply module and the power reception resonator of the power reception module are opposed to each other, and a quadrangular columnar cylindrical magnetic member covering the entire inner circumferential surface of the coil is disposed on the coil inner circumferential surface of the power supply resonator and the power reception resonator. The magnetic field strength Z and the like of the magnetic field space Z formed by the power supply system will be described as the second embodiment.

As a measurement experiment, a magnetic member is provided in the power supply module 1102 and the power reception module 1103 shown in Fig. 18 as a comparative example (hereinafter, simply referred to as a second comparison example) of the second embodiment similarly to the first embodiment When the aluminum piece 60 is inserted into the inner peripheral side of the coil of the receiver resonator 1132 and the aluminum piece 60 is not inserted into the magnetic field space Z formed by the wireless power supply system 1100 S21 " and the change of the magnetic field intensity at the time of the measurement of the transmission characteristic " S21 "

In the power feeding module 1202 and the power receiving module 1203 shown in Fig. 21, the power feeding resonator 1222 and the power receiving resonator 1232 are provided as an embodiment (hereinafter simply referred to as a second embodiment) To the magnetic field space Z formed by the wireless power supply system 1200 having the rectangular cylindrical cylindrical members 1223 and 1233 covering the entire inner circumferential surface of the coil of the power reception resonator 1232, S21 " and the change of the magnetic field strength when the aluminum piece 60 is inserted into the aluminum piece 60 and when the aluminum piece 60 is not inserted.

(Configuration of the wireless power supply system 1100 according to the second comparative example)

18, the wireless power supply system 1100 used in the second comparative example includes a power supply coil 1121 having a rectangular shape and a power supply resonator 1122 having a rectangular columnar cylindrical coil structure. And a power receiving module 1103 including a power feeding module 1102 having a rectangular shape, a power receiving module 1102 having a rectangular shape, and a water receiving resonator 1132 having a rectangular columnar cylindrical coil structure. Similarly to the first embodiment, the output terminal 111 of the network analyzer 110 is connected to the power feeding coil 1121, and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 1131 .

The power supply coil 1121 serves to supply the power obtained from the network analyzer 110 to the power supply resonator 1122 by electromagnetic induction. The power feeding coil 1121 is made of a copper wire having a wire diameter of 1 mmφ (with an insulating coating) once, and has a square shape with a side length of 100 mm.

The power reception coil 1131 serves to output the power transmitted from the power feeding resonator 1122 as the magnetic field energy to the power reception resonator 1132 to the input terminal 112 of the network analyzer 110 by electromagnetic induction. The power receiving coil 1131 is wound with a copper wire (having an insulating coating) having a wire diameter of 1 mm? One turn to form a square having a side length of 100 mm, like the power feeding coil 1121.

The feed resonator 1122 and the water receiver resonator 1132 are LC resonance circuits, respectively, and serve to create a magnetic field resonance state. The feed resonator 1122 and the water receiver resonator 1132 have a quadrangular columnar cylindrical coil structure with one side of 100 mm in which a copper wire with a diameter of 1 mmφ (with insulating coating) is wound three times.

The distance between the feed coil 1121 and the feed resonator 1122 is set to 15 mm and the distance between the feed resonator 1122 and the feed resonator 1132 is set to 30 mm. And the distance between the upper surface 1131 and the lower surface 1131 is set to 15 mm. The power supply resonator 1122 and the power reception resonator 1132 have a resonance frequency of 14.2 MHz. The power supply resonator 1122 and the power reception resonator 1132 are arranged such that the coil surfaces of the power supply resonator 1122 and the power reception resonator 1132 are parallel to each other.

When measuring the change in the magnetic field strength and the change in the transmission characteristic " S21 ", the metal piece to be inserted into the inner peripheral side of the coil of the receiver resonator 1132 was a rectangular parallelepiped aluminum piece having a thickness of 20 mm (60) is used.

(Measurement result of Comparative Example 2)

When the aluminum piece 60 is inserted into the inner peripheral side of the coil of the power reception resonator 1132 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1100 according to the second comparative example, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted in the coil inner circumferential side of the power reception resonator 1132 in the wireless power supply system 1100 by using the network analyzer 110 is referred to as " And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1100.

As a result of the measurement, as shown in Fig. 19, the measured waveform 1141 of the measured transmission characteristic "S21" is separated into peaks toward the low frequency side and the high frequency side.

When the frequency of the AC power supplied to the power feeding module 1102 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode), the power feeding resonator 1122 and the power receiving resonator 1132 So that the direction of the current flowing in the feed resonator 1122 and the direction of the current flowing in the receiver resonator 1132 are in the same direction. FIG. 20 (A) shows the distribution of the magnetic field intensity in this in-phase resonance mode. From the magnetic field intensity distribution shown in Fig. 20A, the influence of the magnetic field is reduced on the outer peripheral side of the power supply resonator 1122 and the water receiving resonator 1132, and the magnetic field space Z1151 having a relatively small magnetic field strength is confirmed .

On the other hand, when the frequency of the alternating-current power supplied to the power feeding module 1102 is set to the frequency fH near the peak on the high-frequency side (reverse phase resonance mode), the power feeding resonator 1122 and the power receiving resonator 1132 are in opposite phase The direction of the current flowing through the feed resonator 1122 and the direction of the current flowing through the receiver resonator 1132 are reversed. FIG. 20 (B) shows the distribution of the magnetic field intensity in this reverse-phase resonance mode. From the magnetic field intensity distribution shown in Fig. 20B, the influence of the magnetic field is reduced on the inner peripheral side of the feed resonator 1122 and the water receiving resonator 1132, and the magnetic field space Z1153 having a relatively small magnetic field strength is confirmed .

S21 " obtained when the aluminum piece 60 is inserted into the coil inner circumferential side of the receiver resonator 1132 in the wireless power supply system 1100 is supplied to the wireless power supply system 1100 through the AC Measure while changing the frequency of the power.

The measurement result is shown in Fig. 19 as the measurement waveform 1142 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 1132. The transmission characteristic S21 at the frequency fL near the peak on the low frequency side in the measurement waveform 1142 is the transmission characteristic S21 when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1132 Is significantly lower than the measured waveform 1141 of the characteristic " S21 ". Similarly, the transmission characteristic " S21 " at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic " S21 " when the aluminum piece 60 is not inserted on the coil inner periphery side of the power reception resonator 1132 Is significantly lower than that of the first electrode 1141.

20 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1132. FIG. 20 (D) shows the distribution of the magnetic field strength in the reverse phase resonance mode when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 1132. As shown in Fig. As described above, in the wireless power supply system 1100, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 1132 can be directly influenced by the aluminum piece 60 Able to know. In other words, it can be seen that the aluminum piece 60 is directly influenced by the magnetic field generated in the wireless power supply system 1100.

(Configuration of the wireless power supply system 1200 according to the second embodiment)

21, the wireless power supply system 1200 used in the second embodiment includes a power supply coil 1221 having a rectangular shape and a power supply resonator 1222 having a rectangular columnar cylindrical coil structure. A power supply module 1202 having a rectangular columnar cylindrical magnet member 1223 that covers the entire inner circumferential surface of the coil of the power feeding resonator 1222 and a rectangular power receiving coil 1231 having a rectangular shape, And a receiving module 1203 including a cylindrical receiving member 1232 having a tubular coil structure and a cylindrical member 1233 having a rectangular columnar shape covering the entire inner circumferential surface of the coil of the receiving resonator 1232. The output terminal 111 of the network analyzer 110 is connected to the power feeding coil 1221 and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 1231 .

The magnetic members 1223 and 1233 are formed by a resin in which magnetic powder is dispersed. The magnetic members 1223 and 1233 have a rectangular columnar shape with a thickness of 1 mm, an outer side of one side of 82 mm, an inner side of 80 mm and a height of 30 mm, and the permeability thereof is set to 100. Other configurations of the power supply coil 1221, the power supply resonator 1222, the power reception coil 1231 and the power reception resonator 1232 are the same as those of the wireless power supply system 1100 according to the second comparative example.

(Measurement result of the second embodiment)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 1232 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1200 according to the second embodiment, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted in the coil inner circumferential side of the power reception resonator 1232 in the wireless power supply system 1200 using the network analyzer 110, And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1200.

As a result of the measurement, as shown in Fig. 22, the measured waveform 1241 of the measured transmission characteristic "S21" has a peak separated from the low frequency side and the high frequency side.

23A shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power supply module 1202 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode) . From the magnetic field intensity distribution in FIG. 23A, the influence of the magnetic field is reduced on the outer peripheral side of the power supply resonator 1222 and the water receiving resonator 1232, and the magnetic field space Z1251 having a relatively small magnetic field intensity is confirmed . It is also possible to confirm the magnetic field space Z1252 having the magnetic field strength whose influence by the magnetic field is slightly reduced on the inner circumferential side of the power supply resonator 1222 and the water receiving resonator 1232. [ Thus, in the in-phase resonance mode, the magnetic field space Z1252 having a smaller magnetic field strength than that of the second comparative example can be formed on the inner circumferential side of the power supply resonator 1222 and the power reception resonator 1232. [

On the other hand, FIG. 23B shows the magnetic field intensity distribution when the frequency of the alternating-current power supplied to the power supply module 1202 is set to the frequency fH near the peak on the high-frequency side (reverse phase resonance mode). From the magnetic field intensity distribution shown in FIG. 23B, the influence of the magnetic field is reduced on the inner peripheral side of the power supply resonator 1222 and the power reception resonator 1232, and the magnetic field space Z1253 having a relatively small magnetic field strength is confirmed . As described above, in the reverse phase resonance mode, the magnetic field space Z1253 having a smaller magnetic field intensity than that of the second comparative example can be formed on the inner circumferential side of the feed resonator 1222 and the reception resonator 1232. [ Further, the magnetic field space Z1253 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z1252 formed in the in-phase resonance mode.

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1232 in the wireless power supply system 1200 to the AC power supply system 1200 Measure while changing the frequency of the power.

The measurement result is shown in Fig. 22 as the measurement waveform 1242 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1232. In this measurement waveform 1242, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak on the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner circumferential side of the receiver resonator 1232 It can be seen that the value of the transmission characteristic is maintained at a high value although it is slightly lower than that of the measurement waveform 1241 of the characteristic " S21 ". On the other hand, the transmission characteristic "S21" at the frequency fH in the vicinity of the peak at the high frequency side is the same as the transmission characteristic "S21" at the time when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 1232 (See point P in Fig. 22).

FIG. 23C shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1232. FIG. 23 (D) shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1232. FIG. As described above, in the wireless power supply system 1200 according to the second embodiment, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the receiver resonator 1232 is smaller than that of the second comparative example It can be seen that the influence of the aluminum piece 60 is not appreciably received. That is, rectangular and quadrangular columnar coils are used for the power supply coil and the feed resonator in the power feeding module, the power receiving coil and the power receiving resonator in the power receiving module, In the wireless power supply system 1200 in the case of using a columnar cylindrical magnetic member, when power is transmitted between the power feeding module 1202 and the power receiving module 1203, the power feeding resonator 1222 and the water receiving cavity The magnetic field generated in the periphery of the power supply resonator 1232 is blocked by the magnetic members 1223 and 1233 and the magnetic field space Z1153 of the second comparative example is provided on the inner circumferential side of the coil of the power supply resonator 1222 and the power reception resonator 1232, A larger magnetic field space Z1253 can be formed. It can be said that the influence of the magnetic field generated in the wireless power supply system 1200 with respect to the aluminum piece 60 is reduced.

(Third Embodiment)

In the wireless power supply systems 100, 200, 300, and 400 in the first embodiment, the power supply coil and the feed resonator in the power supply module, the power reception coil and the power reception resonator in the power reception module are provided with circular and solenoid- In the wireless power supply system 1200 according to the second embodiment, the power supply coil and the feed resonator in the power supply module, the power reception coil in the power reception module, and the power reception resonator are provided with rectangular and square pillar- In the third embodiment, the feed coil and the feed resonator in the power feeding module, the power receiving coil in the power receiving module, and the power receiving resonator are provided with a crescent and a crescent moon as shown in Fig. 24, A description will be given of a wireless power supply system in the case of using a tubular coil of the type shown in Fig. Specifically, the power supply resonator of the power supply module and the power reception resonator of the power reception module are arranged to face each other, and the power supply and the power reception resonator are disposed on the coil inner circumferential surface of the power supply resonator, The magnetic field strength Z and the like of the magnetic field space Z formed by the supply system will be described as the third embodiment.

As a measurement experiment, a magnetic member is provided in the power supply module 1302 and the power reception module 1303 shown in Fig. 24 as a comparative example (hereinafter, simply referred to as a third comparison example) of the third embodiment as in the first embodiment When the aluminum piece 60 is inserted into the inner peripheral side of the coil of the receiver resonator 1332 and the aluminum piece 60 is not inserted into the magnetic field space Z formed by the wireless power supply system 1300 S21 " and the change of the magnetic field intensity at the time of the measurement of the transmission characteristic " S21 "

In the power feeding module 1402 and the power receiving module 1403 shown in Fig. 27, the power feeding resonator 1422 and the power receiving resonator 1432 are provided as the third embodiment (hereinafter simply referred to as a third embodiment) Of the power reception resonator 1432 with respect to the magnetic field space Z formed by the wireless power supply system 1400 having the crescent-shaped cylindrical magnetic members 1423 and 1433 covering the entire inner circumferential surface of the coil of the power reception resonator 1432, S21 " and the change of the magnetic field strength when the aluminum piece 60 is inserted into the aluminum piece 60 and when the aluminum piece 60 is not inserted.

(Configuration of the wireless power supply system 1300 according to the third comparative example)

As shown in Fig. 24, the wireless power supply system 1300 used in the third comparative example includes a power supply coil 1321 having a crescent shape and a power supply resonator 1322 having a crescent-shaped cylindrical coil structure And a power receiving module 1303 including a power feeding module 1302 having a crescent shape, a power receiving coil 1331 having a crescent shape, and a water receiving resonator 1332 having a cylindrical shape of a crescent moon. Similarly to the first embodiment, the output terminal 111 of the network analyzer 110 is connected to the power supply coil 1321, and the input terminal 112 of the network analyzer 110 is connected to the power reception coil 1331 .

The power feeding coil 1321 serves to supply the power obtained from the network analyzer 110 to the power feeding resonator 1322 by electromagnetic induction. As shown in Fig. 24, the copper coil 1321 having a wire diameter of 1 mm is wound once, and the outer diameter of the coil of the power supply coil 1321 is set to 60 mm, And has a crescent shape with a diameter of 30 mm.

The power receiving coil 1331 serves to output the power transmitted from the power feeding resonator 1322 as the magnetic field energy to the power receiving resonator 1332 to the input terminal 112 of the network analyzer 110 by electromagnetic induction. The power receiving coil 1331 is wound once with a copper wire having a wire diameter of 1 mmφ (with insulating coating) once, and the outer diameter of the coil of the power receiving coil 1331 is set to 60 mm in the same manner as the power feeding coil 1321, And has a crescent shape with a diameter of 30 mm.

The feed resonator 1322 and the water receiver resonator 1332 are LC resonance circuits, respectively, and serve to create a magnetic field resonance state. The feed resonator 1322 and the water receiver resonator 1332 are formed by winding a copper wire having a wire diameter of 1 mmφ (with insulating coating) three times (with a line interval of 0.1 mm), setting the outer diameter of the coil to 60 mm, And has a crescent-shaped cylindrical coil structure having a diameter of 30 mm.

The distance between the power feeding coil 1321 and the feeding resonator 1322 is set to 10 mm and the distance between the feeding resonator 1322 and the receiving resonator 1332 is set to 8 mm and the receiving resonator 1332, (1331) is set to 10 mm. The power supply resonator 1322 and the power reception resonator 1332 have a resonance frequency of 15.5 MHz. The power supply resonator 1322 and the power reception resonator 1332 are disposed such that the coil surfaces of the power supply resonator 1322 and the power reception resonator 1332 are parallel to each other.

Further, when measuring the change in the magnetic field strength and the change in the transmission characteristic " S21 ", aluminum pieces 60 made of aluminum having a rectangular parallelepiped shape with a thickness of 5 mm were inserted into the metal pieces inserted into the inner periphery of the coil of the receiver resonator 1332 (Crescent shape) of the resonator 1332 is used.

(Measurement result of Comparative Example 3)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the reception resonator 1332 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1300 according to the third comparative example, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 1332 in the wireless power supply system 1300 using the network analyzer 110, And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1300.

As a result of the measurement, as shown in Fig. 25, the measured waveform 1341 of the measured transmission characteristic "S21" is separated from the peak on the low frequency side and on the high frequency side.

When the frequency of the AC power supplied to the power feeding module 1302 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode), the power feeding resonator 1322 and the power receiving resonator 1332 Phase, and the direction of the current flowing in the feed resonator 1322 and the direction of the current flowing in the receiver resonator 1332 are in the same direction. FIG. 26 (A) shows the distribution of the magnetic field intensity in this in-phase resonance mode. From the magnetic field intensity distribution shown in Fig. 26A, the influence of the magnetic field is reduced on the outer peripheral side of the power feeding resonator 1322 and the water receiving resonator 1332, and the magnetic field space Z1351 having a relatively small magnetic field strength can be identified have.

On the other hand, when the frequency of the alternating-current power supplied to the power feeding module 1302 is set to the frequency fH near the peak on the high frequency side (reverse phase resonance mode), the power feeding resonator 1322 and the power receiving resonator 1332 are in opposite phase The direction of the current flowing in the feed resonator 1322 and the direction of the current flowing in the receiver resonator 1332 are reversed. The magnetic field intensity distribution in this reverse phase resonance mode is shown in Fig. 26 (B). From the magnetic field intensity distribution shown in Fig. 26B, the influence of the magnetic field is reduced on the inner peripheral side of the power feeding resonator 1322 and the water receiving resonator 1332, and the magnetic field space Z1353 having a relatively small magnetic field strength is confirmed .

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1332 in the wireless power supply system 1300 to the AC power supply system 1300 Measure while changing the frequency of the power.

The measurement result is shown in Fig. 25 as a measurement waveform 1342 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1332. [ The transmission characteristic S21 at the frequency fL near the peak on the low frequency side in the measurement waveform 1342 is the transmission characteristic S21 when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1332 Is significantly lower than the measured waveform 1341 of the characteristic " S21 ". Similarly, the transmission characteristic " S21 " at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic " S21 " when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1332 (1341). ≪ / RTI >

26 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 1332. Fig. Fig. 26D shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 1332. Fig. As described above, in the wireless power supply system 1300, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 1332 can be directly influenced by the aluminum piece 60 Able to know. In other words, it can be seen that the aluminum piece 60 is directly influenced by the magnetic field generated in the wireless power supply system 1300.

(Configuration of wireless power supply system 1400 according to the third embodiment)

As shown in Fig. 27, the wireless power supply system 1400 used in the third embodiment includes a cascade-shaped power supply coil 1421, a power supply resonator 1422 having a crescent-shaped cylindrical coil structure, A power feeding module 1402 having a crescent-shaped cylindrical magnetic member 1423 covering the entire inner circumferential surface of the coil of the feed resonator 1422, a crescent-shaped power receiving coil 1431, a crescent- And a receiving module 1403 having a crescent-shaped cylindrical magnetic member 1433 covering the entire inner circumferential surface of the coil of the water receiving resonator 1432. The water receiving module 1403 includes: The output terminal 111 of the network analyzer 110 is connected to the power feeding coil 1421 and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 1431 .

The magnetic members 1423 and 1433 are formed of a resin in which magnetic powder is dispersed. The magnetic members 1423 and 1433 have a crescent-shaped cylindrical shape with a thickness of 1 mm along the inner circumferential surfaces of the power feeding resonator 1422 and the water receiving resonator 1432, and the permeability thereof is set to 100. Other configurations of the power supply coil 1421, the power supply resonator 1422, the power reception coil 1431 and the power reception resonator 1432 are similar to those of the wireless power supply system 1300 according to the third comparative example.

(Measurement result of the third embodiment)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the power reception resonator 1432 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1400 according to the third embodiment, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 1432 in the wireless power supply system 1400 by using the network analyzer 110 is referred to as " And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1400.

As a result of the measurement, as shown in Fig. 28, the measured waveform 1441 of the measured transmission characteristic "S21" is separated from the peak on the low frequency side and on the high frequency side.

29A shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power feeding module 1402 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode) . From the magnetic field intensity distribution shown in Fig. 29A, the influence of the magnetic field is reduced on the outer peripheral side of the power feeding resonator 1422 and the water receiving resonator 1432, and the magnetic field space Z11451 having a relatively small magnetic field strength is confirmed . In addition, the magnetic field space Z1452 having the magnetic field strength slightly reduced in the influence of the magnetic field can be confirmed on the inner circumferential side of the power supply resonator 1422 and the water receiving resonator 1432. As described above, in the in-phase resonance mode, the magnetic field space Z1452 having a smaller magnetic field strength than that of the third comparative example can be formed on the inner peripheral side of the feed resonator 1422 and the reception resonator 1432. [

On the other hand, FIG. 29B shows the magnetic field intensity distribution in the case where the frequency of the AC power supplied to the power supply module 1402 is set to the frequency fH near the peak on the high frequency side (reverse phase resonance mode). From the magnetic field intensity distribution shown in Fig. 29B, the influence of the magnetic field is reduced on the inner circumferential side of the power feeding resonator 1422 and the water receiving resonator 1432, and the magnetic field space Z1453 having a relatively small magnetic field intensity is confirmed . As described above, in the reverse phase resonance mode, the magnetic field space Z1453 having a smaller magnetic field strength than the third comparative example can be formed on the inner circumference side of the feed resonator 1422 and the reception resonator 1432. [ The magnetic field space Z1453 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z1452 formed in the in-phase resonance mode.

Next, in the wireless power supply system 1400, the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1432 is supplied to the AC power supply system 1400 Measure while changing the frequency of the power.

The measurement result is shown in Fig. 28 as the measurement waveform 1442 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1432. In this measurement waveform 1442, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak on the low frequency side is the transmission characteristic S21 when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 1432 Quot; S21 ", but the value of the transmission characteristic is maintained at a high value. On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1432 (See point P in FIG. 28).

FIG. 29C shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1432. FIG. 29 (D) shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1432. FIG. As described above, in the wireless power supply system 1400 according to the third embodiment, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the receiving resonator 1432 is smaller than that of the third comparative example It can be seen that the influence of the aluminum piece 60 is not appreciably received. That is, a crescent-shaped and a crescent-shaped cylindrical coil is used for the feed coil and the feed resonator in the feed module and the feed coil and the feeder resonator in the feed module, and the crescent- In the wireless power supply system 1400 in the case of using the magnetic member having the cylindrical shape of the feeder resonator 1422 and the power reception resonator 1432 when power is transmitted between the power supply module 1402 and the power reception module 1403, The magnetic field generated in the periphery of the power supply resonator 1422 and the power reception resonator 1432 is cut off by the magnetic members 1423 and 1433 so as to be larger than the magnetic field space Z1353 of the third comparative example So that the magnetic field space Z1453 can be formed. It can be said that the influence of the magnetic field generated in the wireless power supply system 1400 is reduced with respect to the aluminum piece 60.

(Fourth Embodiment)

In the wireless power supply systems 100, 200, 300, and 400 in the first embodiment, the power supply coil and the feed resonator in the power supply module, the power reception coil and the power reception resonator in the power reception module are set to have the same Diameter portion is used as the power supply module. However, in the fourth embodiment, as shown in Fig. 30, the power supply coil and the power supply resonator in the power supply module, the power reception coil and the power reception resonator in the power reception module have different coil diameters A description will be given of a wireless power supply system in the case of using the wireless power supply system. More specifically, a coil diameter of the power receiving coil and the power receiving resonator in the power receiving module is set to be smaller than the coil diameter of the power feeding coil and the power feeding resonator in the power feeding module. A feeder resonator of the feed module and a feeder resonator of the feeder module are opposed to each other and a cylindrical magnetic member covering the entire inner circumferential surface of the coil is disposed on the coil inner circumferential surface of the feeder resonator and the feeder resonator The strength of the magnetic field or the like is measured with respect to the magnetic field space Z to be described below as the fourth embodiment.

As a measurement experiment, a magnetic member is provided in the power supply module 1502 and the power reception module 1503 shown in Fig. 30 as a comparative example (hereinafter, simply referred to as a fourth comparative example) of the fourth embodiment similarly to the first embodiment When the aluminum piece 60 is inserted into the coil inner circumference side of the receiving resonator 1532 and the aluminum piece 60 is not inserted into the magnetic field space Z formed by the wireless power supply system 1500 Quot; S21 " at the time of measurement.

In the power feeding module 1602 and the power receiving module 1603 shown in Fig. 32, the power feeding resonator 1622 and the power receiving resonator 1632 are provided as the fourth embodiment (hereinafter simply referred to as a fourth embodiment) The power supply system 1600 includes a cylindrical power supply system 1600 having cylindrical magnetic members 1623 and 1633 covering the entire inner circumferential surface of the coil of the power reception resonator 1632, S21 " when the aluminum piece 60 is inserted and when the aluminum piece 60 is not inserted, and the strength of the magnetic field when the aluminum piece 60 is not inserted are measured. In the fourth embodiment, three models (Models A1, A2, and A3, which will be described in detail later) in which the diameter of the cylindrical magnetic member 1623 covering the entire inner circumferential surface of the coil of the power feeding resonator 1622 are changed .

(Configuration of the wireless power supply system 1500 according to the fourth comparative example)

30, the wireless power supply system 1500 used in the fourth comparative example includes a power supply coil 1521 having a circular shape and a power supply module (power supply module) 1522 having a cylindrical power supply resonator 1522 1503, and a power receiving module 1503 having a cylindrical receiving-type resonator 1532. The power receiving module 1503 includes a power receiving module 1503, The output terminal 111 of the network analyzer 110 is connected to the power supply coil 1521 and the input terminal 112 of the network analyzer 110 is connected to the power reception coil 1531, .

The power supply coil 1521 serves to supply the power obtained from the network analyzer 110 to the power supply resonator 1522 by electromagnetic induction. The power feeding coil 1521 is made of a copper wire having a wire diameter of 1 mmφ (with an insulating coating) once, and has a circular shape with an inner diameter of 54 mmφ.

The power reception coil 1531 serves to output the power transmitted from the power feeding resonator 1522 to the power reception resonator 1532 as magnetic field energy to the input terminal 112 of the network analyzer 110 by electromagnetic induction. The power receiving coil 1531 is made of a copper wire having a wire diameter of 1 mmφ (with insulating coating) wound once, and has an inner diameter of 36 mmφ.

The feed resonator 1522 and the receiver resonator 1532 are LC resonance circuits, respectively, and serve to create a magnetic field resonance state. The feed resonator 1522 is a solenoid-type coil having an inner diameter of 54 mm in diameter obtained by winding a copper wire (having an insulating coating) having a wire diameter of 1 mmφ four times, and has a resonance frequency of 17.2 MHz. On the other hand, the water receiving resonator 1532 is a solenoid type coil having an inner diameter of 36 mmφ obtained by winding a copper wire having a diameter of 1 mmφ (with insulating coating) six times, and the resonance frequency is 17.2 MHz.

The distance between the feed coil 1521 and the feed resonator 1522 is set to 5 mm and the distance between the feed resonator 1522 and the feed resonator 1532 is set to 18 mm. 1531 is set to 5 mm. The power supply resonator 1522 and the power reception resonator 1532 are disposed such that the coil surfaces of the power supply resonator 1522 and the power reception resonator 1532 are parallel to each other.

In measuring the change of the magnetic field strength and the change of the transmission characteristic " S21 ", aluminum pieces 60 made of aluminum and having a diameter of 27 mm and a thickness of 10 mm are formed in the metal piece inserted into the inner side of the coil of the receiver resonator 1532, Lt; / RTI >

(Measurement result of comparative example 4)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 1532 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1500 according to the fourth comparative example, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 1532 in the wireless power supply system 1500 using the network analyzer 110 is referred to as " And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1500.

As a result of the measurement, as shown in Fig. 31, the measured waveform 1541 of the measured transmission characteristic "S21" separates the peak from the low frequency side and the high frequency side.

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1532 in the wireless power supply system 1500 to the AC power supply system 1500, Measure while changing the frequency of the power.

The measurement result is shown in Fig. 31 as the measurement waveform 1542 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the inner circumferential side of the coil of the water receiving resonator 1532. The transmission characteristic S21 at the frequency fL near the low frequency side peak and the transmission characteristic S21 at the frequency fH near the high frequency side peak in the measurement waveform 1542 correspond to the transmission characteristic S21 S21 " when the aluminum piece 60 is not inserted into the inner circumferential side of the coil of the " S21 ".

(Configuration of wireless power supply system 1600 according to the fourth embodiment)

32, the wireless power supply system 1600 used in the fourth embodiment includes a power supply coil 1621 having a circular shape, a power supply resonator 1622 having a cylindrical shape, a power supply resonator 1622, A power reception module 1602 having a cylindrical magnetic member 1623 covering the entire inner circumferential surface of the coil of the power reception resonator 1632 and a power reception coil 1631 having a circular shape, a cylindrical water reception resonator 1632, And a receiving module 1603 having a cylindrical magnetic member 1633 that covers the entire inner circumferential surface of the coil of the coil 1603. The output terminal 111 of the network analyzer 110 is connected to the power supply coil 1621 and the input terminal 112 of the network analyzer 110 is connected to the power reception coil 1631, have.

The magnetic members 1623 and 1633 are formed of a resin in which magnetic powder is dispersed. In the model A1, as shown in Fig. 32, the inner diameter of the magnetic member 1623 is 46 mm?, The thickness is 1 mm, and the permeability thereof is 100. In the model A2, as shown in Fig. 32, the inner diameter of the magnetic member 1623 is 37 mm?, The thickness is 1 mm, and the permeability thereof is 100. In the model A3, as shown in Fig. 32, the inner diameter of the magnetic member 1623 is 28 mm?, The thickness is 1 mm, and the permeability is 100. The inner diameters of the magnetic members 1633 in the model A1, the model A2, and the model A3 are 28 mm in diameter common to the cylinders having a thickness of 1 mm and the permeability thereof is 100. Other configurations of the power supply coil 1621, the power supply resonator 1622, the power reception coil 1631 and the power reception resonator 1632 are the same as those of the wireless power supply system 1500 according to the fourth comparative example.

(Measurement result of the fourth embodiment)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 1632 and the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1600 according to the fourth embodiment, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the coil inner circumferential side of the power reception resonator 1632 in the wireless power supply system 1600 is determined by wireless And measures the frequency of the AC power supplied to the power supply system 1600 while changing the frequency.

As a result of the measurement, as shown in Fig. 33, in the model A1, the measured waveform 1641A1 of the measured transmission characteristic "S21" is separated from the peak on the low frequency side and the high frequency side.

Then, in the model A1, the magnetic field intensity distribution in the case where the frequency of the alternating-current power supplied to the power feeding module 1602 is set to the frequency (fH) in the vicinity of the peak on the high-frequency side (reverse phase resonance mode) Respectively. From the magnetic field intensity distribution, the influence of the magnetic field is reduced on the inner peripheral side of the power feeding resonator 1622 and the water receiving resonator 1632, and the magnetic field space ZA1 having a relatively small magnetic field strength can be confirmed. Thus, in the reverse phase resonance mode, the magnetic field space ZA1 having a small magnetic field strength can be formed on the inner peripheral side of the feed resonator 1622 and the reception resonator 1632. [

Also in model A2, the measured waveform 1641A2 of the measured transmission characteristic "S21" is separated from the low frequency side and the high frequency side.

Then, in the model A2, the magnetic field intensity distribution when the frequency of the alternating-current power to be supplied to the power supply module 1602 is set to the frequency (fH) in the vicinity of the peak on the high-frequency side (reverse phase resonance mode) Respectively. From this magnetic field intensity distribution, the influence of the magnetic field is reduced on the inner periphery side of the power supply resonator 1622 and the power reception resonator 1632 as in the case of the model A1, and the magnetic field space ZA2 having a relatively small magnetic field strength can be confirmed . As described above, even in the model A2 in which the inner diameter of the magnetic member 1623 is smaller than that of the model A1 in the reverse phase resonance mode, the same magnetic field strength as that of the model A1 is provided on the inner circumference side of the power feeding resonator 1622 and the power receiving resonator 1632 The magnetic field space ZA2 can be formed.

Also in the model A3, the measured waveform 1641A3 of the measured transmission characteristic "S21" is separated from the low frequency side to the high frequency side.

Then, in the model A3, the magnetic field intensity distribution when the frequency of the alternating-current power supplied to the power supply module 1602 is set to the frequency (fH) in the vicinity of the peak on the high-frequency side (reverse phase resonance mode) Respectively. From this magnetic field intensity distribution, the influence of the magnetic field is reduced on the inner peripheral side of the power supply resonator 1622 and the power reception resonator 1632 as in the case of the model A1 and the model A2, and the magnetic field space ZA3 having a relatively small magnetic field intensity is Can be confirmed. Thus, even in the model A3 in which the inner diameter of the magnetic member 1623 is smaller than that of the model A1 and the model A2 in the reverse phase resonance mode, the model A1 and the model A2 The magnetic field space ZA3 having the same magnetic field intensity as that of the magnetic field space ZA3 can be formed.

S21 " obtained when the aluminum piece 60 is inserted into the coil inner circumferential side of the receiver resonator 1632 in the wireless power supply system 1600 is supplied to the wireless power supply system 1600 through the AC Measure while changing the frequency of the power.

The measurement result of the model A1 is shown in Fig. 33 as the measurement waveform 1642A1 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1632. In this measurement waveform 1642A1, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak at the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner circumferential side of the receiver resonator 1632 Is slightly lower than that of the measurement waveform 1641A1 of the characteristic " S21 ", but the value of the transmission characteristic is maintained at a high value. On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the coil inner peripheral side of the power reception resonator 1632 (See point P of model A1 in Fig. 33).

Next, the measurement result of the model A2 is shown in Fig. 33 as the measurement waveform 1642A2 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiver resonator 1632. Fig. In this measurement waveform 1642A2, the transmission characteristic "S21" at the frequency fL in the vicinity of the peak on the low-frequency side is the transmission characteristic when the aluminum piece 60 is not inserted on the coil inner circumferential side of the power reception resonator 1632 It can be seen that the value of the transmission characteristic is maintained at a high value although it is slightly lower than that of the measurement waveform 1641A2 of the characteristic "S21". On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the coil inner peripheral side of the power reception resonator 1632 (See point P of model A2 in Fig. 33).

Next, the measurement result of the model A3 is shown in Fig. 33 as the measurement waveform 1642A3 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiver resonator 1632. Fig. In the measurement waveform 1642A3, the transmission characteristic "S21" at the frequency fL in the vicinity of the peak on the low-frequency side is the transmission characteristic when the aluminum piece 60 is not inserted on the coil inner circumferential side of the power reception resonator 1632 Is slightly lower than that of the measurement waveform 1641A3 of the characteristic " S21 ", but the value of the transmission characteristic is maintained at a high value. On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the coil inner peripheral side of the power reception resonator 1632 (See point P of model A3 in Fig. 33).

In the three models (Models A1, A2, and A3) in which the diameters of the cylindrical magnetic member 1623 covering the entire inner circumferential surface of the coil of the feed resonator 1622 were changed, Of the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the coil inner circumferential side of the power reception resonator 1632 at the frequency fH of the power reception resonator 1632 is almost equal to the transmission characteristic " It can be seen that the same value is maintained. That is, even when the inner diameter of the magnetic member 1623 is reduced, a magnetic field space having a relatively small magnetic field strength can be formed on the inner peripheral side of the power supply resonator 1622 and the power reception resonator 1632.

Next, in the wireless power supply system 1600 of the fourth embodiment, the magnetic members 1623 and 1633 have a thickness of 1 mm. However, in the following fourth embodiment, the magnetic members 1623 and 1633, When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 1632 with respect to the magnetic field space Z formed by the wireless power supply system 1600 when the thickness of the aluminum piece 602 is increased to 2 mm, Quot; S21 " when the antenna 60 is not inserted. The model A1-2 will be described in which the thickness of the magnetic member 1623 占 1633 of the model A1 of the fourth embodiment is changed from 1 mm to 2 mm. Similarly, the model A2-2 in which the thickness of the magnetic member 1623 占 1633 of the fourth embodiment is changed from 1 mm to 2 mm is taken as the model A2-2, and the thickness of the magnetic member 1623 占 1633 of the model A3 of the fourth embodiment is set to Modification from 1 mm to 2 mm will be described as a model A3-2. The other configuration is the same as that of the wireless power supply system 1600 of the fourth embodiment.

As a result of measurement, when the aluminum piece 60 is inserted into the coil inner circumference side of the water receiving resonator 1632 and the aluminum piece 60 is not inserted, as shown in Fig. 34, in the model A1-2, The peak of the measurement waveform 1641A1-2 of the transmission characteristic "S21" is separated from the low frequency side and the high frequency side.

On the other hand, in the model A1-2, the measurement result of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 1632 is shown as a measurement waveform 1642A1-2 do. In this measurement waveform 1642A1-2, the transmission characteristic " S21 " at the frequency fH in the vicinity of the peak on the high frequency side is the same as the transmission characteristic S21 when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1632 (See point P1 of the model A1-2 in Fig. 34), as compared with the measurement waveform 1641A1-2 of the transmission characteristic " S21 " of Fig. The transmission characteristic S21 at the frequency fL in the vicinity of the peak on the low frequency side is also the same as the transmission characteristic S21 in the case where the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1632 (See point P2 of model A1-2 in Fig. 34).

When the aluminum piece 60 is inserted into the coil inner circumference side of the water receiving resonator 1632 and the aluminum piece 60 is not inserted, the measured waveform of the measured transmission characteristic " S21 " 1641A2-2, the peaks are separated from the low frequency side and the high frequency side.

On the other hand, in the model A2-2, the measurement result of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the inner periphery of the coil of the power reception resonator 1632 is shown as a measurement waveform 1642A2-2 do. In this measurement waveform 1642A2-2, the transmission characteristic " S21 " at the frequency fH in the vicinity of the peak on the high frequency side is the same as the transmission characteristic S21 when the aluminum piece 60 is not inserted into the coil inner peripheral side of the power reception resonator 1632 (See point P1 of model A2-2 in Fig. 34), as compared with the measurement waveform 1641A2-2 of the transmission characteristic " S21 " of Fig. The transmission characteristic S21 at the frequency fL in the vicinity of the peak on the low frequency side is also the same as the transmission characteristic S21 in the case where the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1632 (See point P2 in model A2-2 in Fig. 34).

When the aluminum piece 60 is inserted into the inner circumferential side of the coil of the water receiving resonator 1632 and the aluminum piece 60 is not inserted, the measured waveform of the measured transmission characteristic " S21 " 1641A3-2, the peaks are separated from the low frequency side and the high frequency side.

On the other hand, in the model A3-2, the measurement result of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the power reception resonator 1632 is shown as a measurement waveform 1642A3-2 do. In this measurement waveform 1642A3-2, the transmission characteristic " S21 " at the frequency fH in the vicinity of the peak on the high frequency side is a value obtained when the aluminum piece 60 is not inserted into the coil inner circumferential side of the power reception resonator 1632 (See point P1 of model A3-2 in Fig. 34), as compared with the measurement waveform 1641A3-2 of the transmission characteristic " S21 " of Fig. The transmission characteristic S21 at the frequency fL in the vicinity of the peak on the low frequency side is also the same as the transmission characteristic S21 in the case where the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1632 (See point P2 of model A3-2 in Fig. 34).

According to the above measurement results, three models (model A1-2, model A2-2, model A3-2) in which the thickness of the cylindrical magnetic member 1623 covering the entire inner circumferential surface of the coil of the power feeding resonator 1622 are increased When the aluminum piece 60 is inserted into the inner periphery of the coil of the receiver resonator 1632, not only the transmission characteristic "S21" at the frequency fH near the high frequency side peak but also the frequency near the peak at the low frequency side the transmission characteristic "S21" in the resonance frequency fL is substantially the same value as that of the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the power reception resonator 1632 Able to know.

(Fifth Embodiment)

The distance A between the power supply coil 21 and the power supply resonator 22 is set to 15 mm and the distance between the power reception coil 31 and the power reception resonator 32 is set to 15 mm, The case where the distance B is set to 15 mm and the distance C between the power feeding resonator 22 and the water receiving resonator 32 is set to 30 mm has been described (see Fig. 2). In the fifth embodiment, When the distance A between the feed coil and the feed resonator and the distance B between the feed coils and the feed resonator are set to 0 mm, that is, when the feed coils are disposed on the inner periphery side of the feed resonator, A description will be given of the wireless power supply system in the case where the power reception coils are disposed on the side of the wireless power supply system. Specifically, the power supply coil is disposed on the inner circumferential side of the feed resonator, and the power reception coil is disposed on the inner circumference side of the power supply module and the power reception resonator in which the cylindrical magnetic member is disposed on the inner circumference side of the power supply coil. The magnetic field strength Z and the like of the magnetic field space Z formed by the wireless power supply system provided with the receiving module in which the cylindrical magnetic member is disposed on the inner circumferential side of the coil will be described as the fifth embodiment.

As a measurement experiment, a magnetic member is provided in the power supply module 1702 and the power reception module 1703 shown in Fig. 35 as a comparative example (hereinafter simply referred to as a fifth comparative example) of the fifth embodiment as in the first embodiment When the aluminum piece 60 is inserted into the inner periphery of the coil of the receiving resonator 1732 and the aluminum piece 60 is not inserted into the magnetic field space Z formed by the wireless power supply system 1700 S21 " and the change of the magnetic field intensity at the time of the measurement of the transmission characteristic " S21 "

In the power feeding module 1802 and the power receiving module 1803 shown in Fig. 38, the power feeding resonator 1822 and the power receiving resonator 1832 are provided as the fifth embodiment (hereinafter simply referred to as a fifth embodiment) The electric power supply system 1800 having the cylindrical magnetic members 1823 and 1833 covering the entire inner circumferential surface of the coil of the power reception resonator 1832 with respect to the magnetic field space Z, S21 " and the change of the magnetic field strength when the aluminum piece 60 is inserted and when the aluminum piece 60 is not inserted.

(Configuration of the wireless power supply system 1700 according to the fifth comparative example)

35, the wireless power supply system 1700 used in the fifth comparative example includes a power supply module 1702 in which a power supply coil 1721 is disposed on the inner circumferential side of the power supply resonator 1722, And a power receiving module 1703 in which a power receiving coil 1731 is disposed on the inner circumferential side of the power receiving module. Similarly to the first embodiment, the output terminal 111 of the network analyzer 110 is connected to the power feeding coil 1721, and the input terminal 112 of the network analyzer 110 is connected to the power receiving coil 1731 .

The power feeding coil 1721 serves to supply the power obtained from the network analyzer 110 to the power feeding resonator 1722 by electromagnetic induction. The power feeding coil 1721 is formed into a circular shape having an inner diameter of 70 mm by winding a copper wire (with insulating coating) having a wire diameter of 1 mmφ once.

The power reception coil 1731 serves to output the power transmitted from the power feeding resonator 1722 to the power reception resonator 1732 as magnetic field energy to the input terminal 112 of the network analyzer 110 by electromagnetic induction. This power reception coil 1731 is made of a copper wire having a wire diameter of 1 mmφ (with insulating coating) once, and has a circular shape with an inner diameter of 70 mmφ.

The feed resonator 1722 and the receiver resonator 1732 are LC resonance circuits, respectively, and serve to create a magnetic field resonance state. The power feeding resonator 1722 and the water receiving resonator 1732 are solenoid type coils having an inner diameter of 100 mm phi and having a copper wire having a wire diameter of 1 mm phi wound three times (with insulating coating), and the resonance frequency is 12.9 MHz.

The distance between the feed resonator 1722 and the receiver resonator 1732 is set to 30 mm.

In measuring the change of the magnetic field strength and the change of the transmission characteristic " S21 ", aluminum pieces 60 made of aluminum and having a diameter of 58 mm and a thickness of 20 mm are formed in the metal piece inserted into the inner periphery of the coil of the receiver resonator 1732, Lt; / RTI >

(Measurement result of Comparative Example 5)

When the aluminum piece 60 is inserted into the coil inner circumferential side of the receiving resonator 1732 and when the aluminum piece 60 is inserted into the magnetic field space Z formed by the wireless power supply system 1700 according to the fifth comparative example, And the measurement result of the change of the transmission characteristic " S21 " will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 1732 in the wireless power supply system 1700 by using the network analyzer 110 is referred to as " And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1700.

As a result of the measurement, as shown in Fig. 36, the measured waveform 1741 of the measured transmission characteristic "S21" is separated from the low frequency side and the high frequency side.

When the frequency of the AC power supplied to the power feeding module 1702 is set to the frequency fL near the peak on the low frequency side (in-phase resonance mode), the power feeding resonator 1722 and the power receiving resonator 1732 Phase, and the direction of the current flowing in the feed resonator 1722 and the direction of the current flowing in the receiver resonator 1732 are in the same direction. FIG. 37 (A) shows the magnetic field intensity distribution in this in-phase resonance mode. From the magnetic field intensity distribution shown in Fig. 37A, the influence of the magnetic field is reduced on the outer peripheral side of the power feeding resonator 1722 and the water receiving resonator 1732, and the magnetic field space Z1751 having a relatively small magnetic field strength is confirmed .

On the other hand, when the frequency of the alternating-current power supplied to the power feeding module 1702 is set to the frequency fH near the peak on the high frequency side (reverse phase resonance mode), the power feeding resonator 1722 and the power receiving resonator 1732 are in opposite phase So that the direction of the current flowing in the feed resonator 1722 and the direction of the current flowing in the feed resonator 1732 are reversed. The magnetic field intensity distribution in this reverse phase resonance mode is shown in Fig. 37 (B). From the magnetic field intensity distribution shown in Fig. 37B, the influence of the magnetic field is reduced on the inner peripheral side of the feed resonator 1722 and the reception resonator 1732, and the magnetic field space Z1753 having a relatively small magnetic field strength is confirmed .

S21 " obtained when the aluminum piece 60 is inserted into the coil inner circumferential side of the receiver resonator 1732 in the wireless power supply system 1700 is supplied to the wireless power supply system 1700 through the AC Measure while changing the frequency of the power.

The measurement result is shown in Fig. 36 as a measurement waveform 1742 of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiver resonator 1732. The transmission characteristic S21 at the frequency fL near the peak on the low frequency side in the measurement waveform 1742 is the transmission characteristic S21 when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1732 Is significantly lower than the measured waveform 1741 of the characteristic " S21 ". Similarly, the transmission characteristic " S21 " at the frequency fH near the peak on the high frequency side is also the same as the transmission characteristic " S21 " when the aluminum piece 60 is not inserted on the coil inner periphery side of the receiver resonator 1732 (1741). ≪ / RTI >

37 (C) shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1732. Fig. 37 (D) shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the inner peripheral side of the coil of the water receiving resonator 1732. In Fig. As described above, in the wireless power supply system 1700, when the aluminum piece 60 is inserted into the inner periphery of the coil of the receiver resonator 1732, the magnetic field intensity distribution is directly influenced by the aluminum piece 60 Able to know. In other words, it can be seen that the aluminum piece 60 is directly influenced by the magnetic field generated in the wireless power supply system 1700.

(Configuration of the wireless power supply system 1800 according to the fifth embodiment)

38, the feeder coil 1821 is disposed on the inner circumferential side of the feed resonator 1822 and the inner periphery of the feeder coil 1821 is disposed on the inner circumferential side of the feeder resonator 1822, The power reception module 1802 in which the cylindrical magnetic member 1823 is disposed on the side of the power reception coil 1831 and the power reception coil 1831 on the inner periphery side of the power reception resonator 1832, And a power receiving module 1803 in which a magnetic member 1833 of the power receiving module 1833 is disposed. The output terminal 111 of the network analyzer 110 is connected to the power supply coil 1821 and the input terminal 112 of the network analyzer 110 is connected to the power reception coil 1831, .

The magnetic members 1823 and 1833 are formed of a resin in which magnetic powder is dispersed. The magnetic members 1823 and 1833 have a cylindrical shape with an inner diameter of 60 mm, a height of 30 mm, a thickness of 1 mm, and a permeability of 100. Other configurations of the power supply coil 1821, the power supply resonator 1822, the power reception coil 1831 and the power reception resonator 1832 are the same as those of the wireless power supply system 1700 according to the fifth comparative example.

(Measurement result of the fifth embodiment)

(More specifically, on the inner peripheral side of the magnetic member 1833) of the power reception resonator 1832 with respect to the magnetic field space Z formed by the wireless power supply system 1800 according to the fifth embodiment The measurement results of the change of the magnetic field strength and the change of the transmission characteristic "S21" when the aluminum piece 60 is inserted and when the aluminum piece 60 is not inserted will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted into the inner periphery of the coil of the power reception resonator 1832 in the wireless power supply system 1800 by using the network analyzer 110 is referred to as " While measuring the frequency while changing the frequency of the AC power supplied to the power supply system 1800.

As a result of the measurement, as shown in Fig. 39, the measured waveform 1841 of the measured transmission characteristic "S21" has a peak separated from the low frequency side and the high frequency side.

40A shows the magnetic field intensity distribution when the frequency of the AC power supplied to the power supply module 1802 is set to the frequency fL near the peak at the low frequency side (in-phase resonance mode) . From the magnetic field intensity distribution shown in FIG. 40 (A), the influence of the magnetic field is reduced on the outer peripheral side of the feed resonator 1822 and the reception resonator 1832, and a magnetic field space Z1851 having a relatively small magnetic field intensity is confirmed . It is also possible to confirm the magnetic field space Z1852 having the magnetic field strength slightly reduced in the influence of the magnetic field on the inner circumferential side of the feed resonator 1822 and the reception resonator 1832. [ As described above, in the in-phase resonance mode, the magnetic field space Z1852 having a smaller magnetic field intensity than that of the fifth comparative example can be formed on the inner peripheral side of the feed resonator 1822 and the reception resonator 1832. [

On the other hand, FIG. 40B shows the magnetic field intensity distribution in the case where the frequency fH near the peak on the high frequency side is set to the frequency of the AC power to be supplied to the power supply module 1802 (the reverse phase resonance mode). From the magnetic field intensity distribution shown in FIG. 40B, the influence of the magnetic field is reduced on the inner peripheral side of the power feeding resonator 1822 and the water receiving resonator 1832, and the magnetic field space Z1853 having a relatively small magnetic field intensity is confirmed . As described above, in the reverse phase resonance mode, the magnetic field space Z1853 having a smaller magnetic field intensity than that of the fifth comparative example can be formed on the inner circumferential side of the feed resonator 1822 and the reception resonator 1832. [ In addition, the magnetic field space Z1853 formed in the reverse phase resonance mode can be formed wider than the magnetic field space Z1852 formed in the in-phase resonance mode.

Next, in the wireless power supply system 1800, the transmission characteristics "when the aluminum piece 60 is inserted into the coil inner circumference side (more specifically, the inner circumference side of the magnetic member 1833) of the power reception resonator 1832 S21 " are measured while changing the frequency of the AC power supplied to the wireless power supply system 1800. [

The measurement result is shown in Fig. 39 as the measurement waveform 1842 of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiver resonator 1832. Fig. In this measurement waveform 1842, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak at the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 1832 It is understood that the value of the transmission characteristic is maintained at a high value although it is slightly lower than the measurement waveform 1841 of the characteristic " S21 ". On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1832 (See point P in FIG. 39).

FIG. 40C shows the magnetic field intensity distribution in the in-phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1832. FIG. Fig. 40D shows the magnetic field intensity distribution in the reverse phase resonance mode when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1832. Fig. As described above, in the wireless power supply system 1800 according to the fifth embodiment, the magnetic field intensity distribution when the aluminum piece 60 is inserted into the inner periphery of the coil of the receiver resonator 1832 is smaller than that of the fifth comparative example It can be seen that the influence of the aluminum piece 60 is not appreciably received. That is, a power supply coil is disposed on the inner circumferential side of the feed resonator, a power reception module in which a cylindrical magnetic member is disposed on the inner circumference side of the power supply coil, and a power reception coil is disposed on the inner periphery side of the power reception resonator. In the wireless power supply system 1800 having the power reception module in which the cylindrical magnetic member is disposed on the inner circumferential side, the power supply resonator 1822, when power is transmitted between the power supply module 1802 and the power reception module 1803, And the power reception resonator 1832 are cut off by the magnetic members 1823 and 1833 so that the power supply resonator 1822 and the power reception resonator 1832 are provided on the inner circumferential side of the coil, It is possible to form a magnetic field space Z1853 larger than the magnetic field space Z1753. It can be said that the influence of the magnetic field generated in the wireless power supply system 1800 is reduced with respect to the aluminum piece 60.

The power supply module 1802 used in the wireless power supply system 1800 is such that the power supply coil 1821 is disposed on the inner circumferential side of the power supply resonator 1822 and the magnetic member 1823 is connected to the power supply coil 1821 And is symmetrical with respect to the central cross section of the power supply module 1802 because it is disposed on the inner peripheral side. This allows the feed resonator 1822 provided in the power feeding module 1802 and the power receiving module 1802 provided in the power receiving module 1802 to be disposed at any positions on both sides of the power feeding module 1802 The resonance state of the magnetic field is created under the same conditions and the wireless power transmission becomes possible. This gives flexibility to the arrangement (design) of the power supply module 1802 and the like in configuring the wireless power supply system 1800. [ In addition, when the power reception modules 1803 are disposed on both sides of the power supply module 1802, wireless power transmission is possible from one power supply module 1802 to two power reception modules 1803. The power supply coil 1821 may be disposed on the outer peripheral side of the power supply resonator 1822 in the power supply module 1802 used in the wireless power supply system 1800. In this case, And is disposed on the inner circumferential side of the resonator 1822. The power reception coil 1831 may be disposed on the outer circumferential side of the power reception resonator 1832 in the power reception module 1803 and the magnetic member 1833 may be disposed on the inner periphery side of the power reception resonator 1832 .

(Sixth Embodiment)

13, in the wireless power supply system 400 according to the third embodiment of the first embodiment, the power supply resonator 22 of the power supply module 402 and the power supply resonator 32 of the power reception module 403, And the center axis of the coil of the power feeding resonator 22 and the center axis of the coil of the power receiving resonator 32 coincide with each other (see Figs. 11 to 13). In the sixth embodiment, as shown in Figs. 41A to 41C, the coil center axis 1927 of the feed resonator 1922 and the coil center axis 1937 of the receiver resonator 1932 are shifted from each other A description will be given of the wireless power supply system 1900 in a case where the wireless power supply system 1900 is disposed (not aligned with the central axes). The wireless power supply system 1900 has the same configuration as that of the wireless power supply system 400 according to the third embodiment of the first embodiment and includes the coil center axis 1927 of the feed resonator 1922 and the reception resonator 1932, And the coil center axis 1937 of the coil 1920 is arranged so as to be displaced.

Specifically, the wireless power supply system 1900 used in the sixth embodiment includes a power supply coil 1921, a power supply resonator 1922, a power supply coil 1921, A cylindrical magnetic member 1923 that covers the entire inner circumferential surface of the coil of the feed resonator 1922 and a cylindrical magnetic member 1924 that covers the entire outer circumferential surface of the coil of the power supply resonator 1922 and a power supply resonator 1922 A power feeding module 1902 having a ring-shaped magnetic member 1925 covering a side surface opposite to the coil opposing face; and a power feeding module 1902 including a power receiving coil 1931, a power receiving resonator 1932, a power receiving coil 1931, and a power receiving resonator 1932 A cylindrical magnetic member 1934 covering the entire outer circumferential surface of the coil of the power reception resonator 1932 and the coil opposed to the coil opposition 1932 of the power reception resonator 1932, And a ring-shaped magnetic member 1935 covering the side surface opposite to the surface It is provided with a power reception module 1903. An output terminal 111 of the network analyzer 110 is connected to the power supply coil 1921 and an input terminal 112 of the network analyzer 110 is connected to the power reception coil 1931.

The aluminum piece 60 (see FIG. 19) is provided on the coil inner circumference side (more specifically, on the inner circumference side of the magnetic member 1933) of the power reception resonator 1932 with respect to the magnetic field space Z formed by the wireless power supply system 1900 S21 " when the aluminum piece 60 is inserted and the strength of the magnetic field when the aluminum piece 60 is inserted are measured. In the sixth embodiment, a model A in which the positional deviation of the coil central axis 1927 of the power feeding resonator 1922 and the coil center axis 1937 of the water receiving resonator 1932 is set to 5 mm, One model B, and the model C set to 20 mm.

(Measurement result of the sixth embodiment)

(More specifically, on the inner circumference side of the magnetic member 1933) of the power reception resonator 1932 with respect to the magnetic field space Z formed by the wireless power supply system 1900 according to the sixth embodiment The measurement results of the change of the magnetic field strength and the change of the transmission characteristic "S21" when the aluminum piece 60 is inserted and when the aluminum piece 60 is not inserted will be described.

First, the transmission characteristic "S21" when the aluminum piece 60 is not inserted in the coil inner circumferential side of the power reception resonator 1932 in the wireless power supply system 1900 is determined by wireless And measures the frequency while changing the frequency of the AC power supplied to the power supply system 1900.

As a result of the measurement, as shown in Fig. 41, the measurement waveform 1941A of the measured transmission characteristic "S21" separates the peak from the low frequency side and the high frequency side in the model A (position shift 5 mm).

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1932 in the wireless power supply system 1900 of the model A to the wireless power supply system 1900 Measure the frequency while changing the frequency of the supplied AC power.

The measurement result of the model A is shown in Fig. 41 as the measurement waveform 1942A of the transmission characteristic " S21 " when the aluminum piece 60 is inserted into the coil inner circumference side of the water receiving resonator 1932. Fig. In this measurement waveform 1942A, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak on the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner peripheral side of the receiver resonator 1932 It is understood that the value of the transmission characteristic is maintained at a high value although it is slightly lower than the measured waveform 1941A of the characteristic "S21". On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1932 (See point P of model A in Fig. 41).

41, the transmission characteristic "S21" measured when the aluminum piece 60 is not inserted into the inner periphery of the coil of the receiver resonator 1932 in the model B wireless power supply system 1900 The peak is separated from the low frequency side and the high frequency side by the measurement waveform 1941B.

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1932 in the wireless power supply system 1900 of the model B to the wireless power supply system 1900 Measure the frequency while changing the frequency of the supplied AC power.

The measurement result of the model B is shown in Fig. 41 as the measurement waveform 1942B of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumferential side of the water receiving resonator 1932. In this measurement waveform 1942B, the transmission characteristic "S21" at the frequency fL in the vicinity of the peak on the low-frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner circumferential side of the receiver resonator 1932 Quot; S21 ", but the value of the transmission characteristic is maintained at a high value. On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1932 (See point P of model B in Fig. 41).

41, the transmission characteristic "S21" measured when the aluminum piece 60 is not inserted into the coil inner circumferential side of the receiver resonator 1932 in the wireless power supply system 1900 of the model C The peak of the measured waveform 1941C is separated from the low frequency side and the high frequency side.

S21 " when the aluminum piece 60 is inserted into the coil inner circumferential side of the receiver resonator 1932 in the wireless power supply system 1900 of the model C to the wireless power supply system 1900 Measure the frequency while changing the frequency of the supplied AC power.

The measurement result of the model C is shown in Fig. 41 as the measurement waveform 1942C of the transmission characteristic "S21" when the aluminum piece 60 is inserted into the coil inner circumference side of the water receiving resonator 1932. In this measurement waveform 1942C, the transmission characteristic " S21 " at the frequency fL in the vicinity of the peak on the low frequency side is the transmission characteristic when the aluminum piece 60 is not inserted into the coil inner circumferential side of the receiver resonator 1932 It can be seen that the value of the transmission characteristic is maintained at a high value although it is slightly lower than the measured waveform 1941C of the characteristic "S21". On the other hand, the transmission characteristic "S21" at the frequency fH near the peak on the high frequency side is the same as the transmission characteristic "S21" when the aluminum piece 60 is not inserted on the inner peripheral side of the coil of the receiver resonator 1932 (See point P of model C in Fig. 41).

According to the above measurement result, a model A in which the positional deviation of the coil center axis 1927 of the feed resonator 1922 and the coil center axis 1937 of the receiver resonator 1932 is set to 5 mm, and a model B The transmission characteristic S21 at the frequency fH near the peak on the high frequency side in the three models of the model C set to 20 mm is equivalent to the transmission characteristic S21 of the aluminum piece 60 on the inner peripheral side of the coil of the receiver resonator 1932 Are substantially equal to the measured waveforms 1941A, 1941B, and 1941C of the transmission characteristic " S21 " when they are not inserted, respectively. That is, even when the coil center axis 1927 of the power feeding resonator 1922 and the coil center axis 1937 of the power receiving resonator 1932 are displaced from each other, the power feeding resonator 1922 and the receiving resonator 1932, A magnetic field space having a relatively small magnetic field strength can be formed.

(Embodiment 1)

Next, an application example of the method of forming the magnetic field space Z explained in the above embodiment will be briefly described as the first embodiment.

For example, in the wireless power supply system 200, the power supply module 202 having the power supply coil 21 and the power supply resonator 22, and the power supply module 202 having the power reception coil 31 and the power reception resonator 32 A power supply resonator 22 and a power reception resonator 32 are connected to the power supply resonator 22 and the power reception resonator 32 with a solenoid type coil being used as a main component, And the coil surfaces of the water receiving resonator 32 are opposed to each other. A cylindrical magnetic member 23 covering the entire inner circumferential surface of the coil of the power feeding resonator 22 is disposed on the coil inner circumferential surface of the power feeding resonator 22. Likewise, a cylindrical magnetic member 33 covering the entire inner circumferential surface of the coil of the receiver resonator 32 is also disposed on the inner circumferential surface of the coil of the receiver resonator 32. In this embodiment, an oscillation circuit for adjusting the frequency of electric power to be supplied to the power supply module 202, instead of the output terminal 111 of the network analyzer 110, is connected to the power supply coil 21 of the power supply module 202 A rectifying / stabilizing circuit for rectifying the AC power received in place of the input terminal 112 of the network analyzer 110 is connected to the receiving coil 31 of the receiving module 203 and a rectifying / And a rechargeable battery through a charging circuit is connected.

The oscillation circuit is housed in the power supply module 202 side of the power supply resonator 22 on the inner circumferential side (the inner circumference side of the magnetic member 23), that is, the magnetic field space Z253, The rectifying / stabilizing circuit is accommodated in the inner circumferential side (the inner circumferential side of the magnetic member 33) of the water receiving resonator 32 on the side where the magnetic field space Z253 is formed. Further, the charging circuit and the rechargeable battery may be housed in the inner circumferential side of the water receiving resonator 32 of the water receiving module 203.

In the wireless power supply system 200 configured as described above, the AC power supplied from the AC power source to the power feeding coil 21 through the oscillation circuit is supplied to the electromagnetic induction between the power feeding coil 21 and the power feeding resonator 22, A radio transmission using a resonance (magnetic field resonance state) between the resonator 22 and the receiver resonator 32 and an electromagnetic induction between the receiver resonator 32 and the receiver coil 31. The rectifier / To the rechargeable battery. When the electric power is supplied from the power feeding resonator 22 to the power receiving resonator 32 through resonance, the magnetic field generated in the vicinity of the power feeding resonator 22 and the power receiving resonator 32 is supplied to the magnetic member 23 · 33 Thereby forming a magnetic field space Z253 having a relatively small magnetic field strength in which the influence of the magnetic field on the oscillation circuit and the rectification / stabilization circuit disposed on the inner peripheral side of the feed resonator 22 and the power reception resonator 32 is reduced, can do.

In the embodiment described above, an oscillation circuit for reducing the influence of the magnetic field in the magnetic field space Z253 or the magnetic field space Z253 formed on the inner peripheral side of the power supply resonator 22 and the water receiving resonator 32, Since the rectification / stabilization circuit is housed, the occurrence of eddy currents due to the magnetic field in the oscillation circuit and the rectification / stabilization circuit can be reduced or prevented, and adverse influences due to heat generation can be suppressed.

By storing the oscillation circuit and the rectification / stabilization circuit in the magnetic field space Z253 having a relatively small magnetic field strength, the oscillation circuit and the rectification / stabilization circuit can be prevented from generating heat, and compactness can be achieved.

7, the magnetic field space Z251, the magnetic field space Z252, the magnetic field Z252, the magnetic field space Z252, The magnetic field is not influenced by the metal foreign matter even if a metal foreign matter exists in the place where the space Z253 is formed so that the electric power can be efficiently supplied from the power feeding module 202 to the power receiving module 203 using the resonance phenomenon have.

In the above-described embodiments and the embodiments, the magnetic members 23 and 33, the magnetic members 24 and 34, and the magnetic members 25 and 35 are provided on both the power supply module 202 and the power reception module 203 However, it may be configured to be disposed only on one side of the power supply module 202 or the power reception module 203.

(Embodiment 2)

42, the wireless power supply system 2000 includes a power supply module 2002 including a power supply coil 2021, a power supply resonator 2022, and a magnetic member 2023, A rechargeable battery 2063 housed in the power reception module 2003 and a circuit board 2062 composed of a rectification / stabilization circuit for rectifying the received AC power and a charging circuit for preventing overcharge, etc. And a smart phone (2001).

The smartphone 2001 includes a housing body 2070 housing a circuit board 2062 composed of a rechargeable battery 2063 and a rectifying / stabilizing circuit for rectifying the received AC power, a charging circuit for preventing overcharging, and the like, And a water receiving device 2060 detachably mounted on the outer peripheral portion of the water tank 2070. The water receiving apparatus 2060 includes a frame body 2061 which is detachable from the outer peripheral portion of the housing body 2070 and accommodates the water receiving module 2003 inside the frame body 2061.

The receiving module 2003 has a rectangular receiving power coil 2031 disposed on the inner periphery side of the receiving resonator 2032 having a quadrangular columnar cylindrical coil structure along the outer periphery of the housing main body 2070, Further, a structure in which a cylindrical member 2033 having a rectangular columnar shape is arranged on the inner peripheral side of the power reception coil 2031 is provided. The power reception device 2060 is installed on the outer periphery of the housing main body 2070 so that the power reception module 2003 is connected to the rechargeable battery 2063 so as to be able to supply power. The power supply module 2002 also has the same structure as that of the power reception module 2003. [

The power reception module 2003 is paired with a plurality of power supply modules 2002 incorporated in the power transmission sheet 2006 so that AC power supplied from the AC power source to the power supply coil 2021 through the oscillation circuit is supplied to the power supply coil And the power reception coil 2031 and the power reception coil 2031 are connected to each other by electromagnetic induction between the feed resonator 2021 and the feed resonator 2022 and between the feed resonator 2022 and the feed resonator 2022, And is supplied to the rechargeable battery 2063 through a circuit base 2062 such as a rectification / stabilization circuit and a charging circuit.

When the electric power is supplied from the power feeding resonator 2022 to the power receiving resonator 2032 through resonance as described above, the magnetic field generated in the vicinity of the power feeding resonator 2022 and the power receiving resonator 2032 is supplied to the magnetic members 2023 and 2033 And the influence of the magnetic field on the circuit base 2062 and the rechargeable battery 2063 housed in the inner circumferential side of the feed resonator 2022 and the receiving resonator 2032, that is, the inside of the housing main body 2070, Space can be formed.

The circuit base 2062 and the rechargeable battery 2063 for reducing the influence of the magnetic field are housed in the magnetic field space formed inside the housing main body 2070, Generation of eddy currents due to the magnetic field can be reduced or prevented, and adverse effects due to heat generation can be suppressed.

In addition, since the circuit base 2062 and the rechargeable battery 2063 can be housed on the inner circumferential side of the receiver resonator 2032, the smart phone 2001 can be made compact.

In the receiving module 2003, the receiving resonator 2032 is formed into a quadrangular columnar cylindrical coil structure along the outer periphery of the housing main body 2070, the receiving coils 2031 are formed into a rectangular shape, The magnetic member 2033 also has a quadrangular columnar shape, so that the magnetic member 2033 is deformed to conform to the shape of the outer peripheral portion of the housing main body 2070 (see the second embodiment). As described above, the power reception coil 2031, the power reception resonator 2032, and the magnetic member 2033 can be changed into a shape adapted to the apparatus that houses the power reception module 2003. For example, in a device installed in the ear, such as an earphone type music player, a hearing aid, a sound collector, and the like, a crescent-shaped housing is used in accordance with the shape of the ear. In accordance with such a crescent-shaped housing, (See the third embodiment).

The power reception module 2003 used in the smartphone 2001 is configured such that the power reception coil 2031 is disposed on the inner periphery side of the power reception resonator 2032 and the magnetic member 2033 is disposed inside the power reception coil 2031 It is symmetrical with respect to the central cross section of the power reception module 2003 (see the fifth embodiment). Therefore, even when the surface of the smartphone 2001 and the back surface of the smartphone 2001 are both down, the power feeding resonator 2022 of the power feeding module 2002, The resonance state of the magnetic resonance is created under the same conditions and the wireless power transmission becomes possible between the receptacle resonator 2032 of the receptacle module 2003 and the case of charging the rechargeable battery 2063 of the smartphone 2001 The convenience can be enhanced.

The coil diameters of the power reception coil 2031 and the power reception resonator 2032 in the power reception module 2003 included in the smartphone 2001 and the power feeding frequency of the power feeding module 2002 provided in the power transmission sheet 2006 The coil diameters of the power receiving coil 2031 and the power receiving resonator 2032 in the power receiving module 2003 are not necessarily the same as the coil diameters of the power feeding module 2002, Or may be larger or smaller than the coil diameters of the power supply coil 2021 and the power supply resonator 2022 (see the fourth embodiment).

When the smartphone 2001 is placed on the power transmission sheet 2006 and charged, the center axis of the coil of the power supply resonator 2022 of the power transmission sheet 2006 and the center of the shaft of the power reception resonator 2032 ) May not coincide with each other (positional deviation may occur: see the sixth embodiment).

In the second embodiment, the smartphone 2001 has been described as an example of the wireless power supply system. However, the present invention can be applied to a tablet PC, a digital camera, a mobile phone, an earphone- And the like. Further, the present invention can be applied not only to devices equipped with the rechargeable battery, but also to devices such as illumination devices and robots that supply power directly without passing through a battery.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And the scope of its application should be interpreted as broadly as possible. In addition, the terms and phrases used in the present specification are used to clearly illustrate the present invention and are not used to limit the interpretation of the present invention. It will be apparent to those skilled in the art that other configurations, systems, methods and the like included in the concept of the present invention may be easily derived from the concept of the invention described herein. Therefore, the description of the claims should be regarded as including an equivalent configuration within the scope of not deviating from the technical idea of the present invention. Further, in order to fully understand the object of the present invention and the effect of the present invention, it is desired to fully take into account the literatures already disclosed.

21: feeding coil 22: feeding resonator
23: magnetic member 31: power receiving coil
32: faucet resonator 33: magnetic member
110: network analyzer 111: output terminal
112: input terminal 200: wireless power supply system
202 feed module 203 feed module
Z: magnetic field space

Claims (6)

A magnetic member is disposed so as to face the coils of the power feeding module and the coils of the receiving module so as to cover at least a part of the faces except the opposing faces of the coils, And a magnetic field space having a magnetic field intensity smaller than that of the magnetic field strength at a desired position is formed at a desired position by performing electric power transmission by changing the magnetic field between the magnetic field intensity and the magnetic field intensity. The method according to claim 1,
Wherein the magnetic member is arranged so as to cover the inner peripheral surface of the coil in the coil and / or the power reception module in the power supply module. 3. The method according to claim 1 or 2,
Wherein the magnetic member is arranged so as to cover the outer peripheral surface of the coil in the power supply module and / or the coil in the power reception module. 4. The method according to any one of claims 1 to 3,
Wherein the magnetic member is disposed so as to cover a surface of the coil in the power supply module and a surface on the opposite side of the opposing surface of the coil in the power reception module. 5. The method according to any one of claims 1 to 4,
Wherein the power transmission is performed from a coil in the power feeding module to a coil in the power receiving module by a resonance phenomenon. 6. The method of claim 5,
The coils in the feed module are a feed coil and a feed resonator,
The coils in the power reception module are a power reception coil and a power reception resonator,
The power fed to the power feeding coil is fed to the power feeding resonator by electromagnetic induction and the power fed to the power feeding resonator is resonated between the power feeding resonator and the power receiving resonator to be transmitted from the power feeding resonator to the power receiving resonator And the power transmission is performed by supplying power to the power reception coil by electromagnetic induction.

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