JP2010283263A - Non-contact power transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact power transmission device which improves power transmission efficiency and a signal communication distance, suppresses conduction noise and magnetic near-field noise, and responds to size reduction. <P>SOLUTION: Two or more magnetic bodies are arranged on surfaces of a first coil 31 and a second coil 32 opposite to a side where the first coil 31 and second coil 32 face to each other. The first coil 31 and second coil 32 have both a power transmission function and a signal transmission/reception function. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a non-contact power transmission apparatus having a function of transmitting and receiving power in a non-contact manner by electromagnetic induction in a portable electronic device and an electronic device used in an environment where power supply by contact is difficult, and in particular, a power transmission coil and a power The present invention relates to a non-contact power transmission device that requires high efficiency between receiving coils.

  In recent years, with the miniaturization of electronic components, portable electronic devices typified by mobile phones and portable music players have been widely spread due to the reduction in size and weight. In general, the charging of a secondary battery of a portable electronic device is performed by bringing the charging terminal of the portable electronic device into contact with the charging terminal installed on the charging stand (cradle) of the charging device and electrically connecting the charging terminal. A method of charging power to the built-in secondary battery is adopted.

  In the charging method in which the charging terminals are connected in contact with each other, charging may not be possible due to contamination of the charging terminals or foreign object intrusion between the charging terminals, so recently a non-contact power supply method using the principle of electromagnetic induction Are often used, and the demand for non-contact power transmission devices used therefor is increasing.

  In non-contact power supply using electromagnetic induction, it is necessary to suppress near magnetic field noise and conduction noise in order to eliminate the influence on other devices arranged in the vicinity. A non-contact power transmission device with such noise countermeasures is disclosed in, for example, Patent Document 1, and increases the transmission efficiency by laminating a high-permeability magnetic layer and a low-permeability magnetic layer on the back surface of a coil to reduce noise. The structure which makes it hard to come out is described.

JP 2009-005475 A

  In the conventional non-contact power transmission device, since only the non-contact power transmission is performed by the first coil and the second coil, it is necessary to provide an antenna for communication, for example, RFID communication, In particular, it has not been possible to sufficiently reduce the size of a small portable device in which the second coil is installed. Moreover, it cannot be said that noise countermeasures using conventional magnetic materials are sufficient.

  Therefore, the present invention aims to solve the conventional technical problems as described above, improve the power transmission efficiency and signal communication distance, suppress conduction noise and near magnetic field noise, and aim at a power transmission device capable of miniaturization. To do.

  In order to solve the above-mentioned problem, the present invention has two or more magnetic bodies arranged on the first coil and the second coil surface opposite to the side facing the first coil and the second coil. The first coil and the second coil are non-contact power transmission devices having a power transmission / reception function and a signal transmission / reception function.

  That is, according to the present invention, there is provided a non-contact power transmission device that transmits power to a first coil and a second coil disposed opposite to the first coil, wherein the first coil and the first coil At least two or more magnetic bodies are arranged on the surfaces of the first coil and the second coil opposite to the side facing the second coil, and the first coil and the second coil are A non-contact power transmission device having a function of transmitting power and a function of transmitting and receiving signals can be obtained.

  That is, according to the present invention, the magnetic body includes a first magnetic body having a complex relative permeability real part 200 or more or a saturation magnetic flux density of 4000 G or more, a complex relative permeability real part 100 or more and 200 or less, and a complex relative permeability. Non-contact power characterized in that it is composed of at least two magnetic bodies of a second magnetic body having a magnetic imaginary part of 10 or less and a third magnetic body having a complex relative permeability imaginary part of 10 or more. A transmission device is obtained.

  That is, according to the present invention, the arrangement of at least two of the first magnetic body, the second magnetic body, and the third magnetic body is laminated. A characteristic contactless power transmission device is obtained.

  That is, according to the present invention, the arrangement of at least two of the first magnetic body, the second magnetic body, and the third magnetic body is a magnetic body formed in a ring shape. A non-contact power transmission apparatus characterized by being concentrically arranged on the same plane can be obtained.

  That is, according to the present invention, the first magnetic body, the second magnetic body, and the third magnetic body are formed in a sheet shape, or formed by plating, vapor deposition, or sputtering. A non-contact power transmission apparatus characterized by the above can be obtained.

  That is, according to the present invention, the first magnetic body is a mixture of a flat soft magnetic powder having a flat shape and a silicone resin having a siloxane bond (Si—O—Si), and is magnetized in the plane. A non-contact power transmission device having an easy direction can be obtained.

  That is, according to the present invention, the second magnetic body is produced by firing a ferrite powder having a crystal grain size of 2 μm or less, and has strong magnetization in a rotational magnetization range. A device is obtained.

  That is, according to the present invention, there can be obtained a non-contact power transmission device characterized in that the third magnetic body is composed of a composite magnetic body in which a magnetic powder is mixed in a heat-shrinkable resin.

  That is, according to the present invention, the third magnetic body comprises a step of bringing a reaction solution containing at least ferrous ions into contact with the substrate, a step of bringing an oxidation solution containing at least an oxidizing agent into contact with the substrate, A non-contact power transmission device is obtained which is formed from a step of removing from the substrate a residue that does not contribute to the generation of the inner magnetic substance of the reaction solution and the oxidizing solution.

  That is, according to the present invention, there is provided a non-contact power transmission device that transmits power to a first coil and a second coil disposed opposite to the first coil, wherein the first coil and the first coil A magnetic body having a complex relative permeability real part 200 or more or a saturation magnetic flux density 4000 G or more is disposed on the surfaces of the first coil and the second coil opposite to the side facing the second coil, and the first coil One coil and the second coil have a function of transmitting the electric power and a function of transmitting and receiving a signal.

  That is, according to this invention, the charging device which comprises the non-contact electric power transmission apparatus provided with said 1st coil is obtained.

  That is, according to this invention, the portable terminal device which comprises the non-contact electric power transmission apparatus provided with said 2nd coil is obtained.

  The first coil and the second coil are preferably reduced in size and efficiency by using flat-plate coils.

  The first coil, the second coil, and the magnetic body are preferably configured to have the same size, but each can cope with a change in size configuration. Is obvious.

  According to the present invention, the power transmission efficiency and the data communication characteristics are both lowered by disposing at least two or more magnetic bodies on the opposite surfaces of the first coil and the second coil. Therefore, conduction noise and near magnetic field noise can be suppressed.

  Furthermore, the first coil and the second coil have both a power transmission / reception function and a signal transmission / reception function, and signals such as RFID are transmitted and received in a similar manner using a circuit that separates power transmission. Both power transmission / reception and signal transmission / reception such as RFID can be performed at the same frequency, and the assembly process can be simplified, the cost can be reduced, and the size can be reduced without increasing the number of components.

  Therefore, by carrying out the present invention, it is possible to provide a power transmission device that can improve the power transmission efficiency and the signal communication distance, suppress conduction noise and near magnetic field noise, and can be reduced in size.

It is a block diagram of the non-contact electric power transmission apparatus of this invention. FIG. 2A is a schematic diagram, and FIG. 2B is a cross-sectional view illustrating a configuration of a first coil, a second coil, and a magnetic body of the contactless power transmission device according to the first embodiment of the present invention. FIG. FIG. 3A is a schematic diagram and FIG. 3B is a cross-sectional view illustrating a configuration of a first coil, a second coil, and a magnetic body of a non-contact power transmission apparatus according to a second embodiment of the present invention. FIG. It is a graph which shows the electric power transmission efficiency measurement result of the non-contact electric power transmission apparatus of this invention. It is a graph which shows the communication distance measurement result of the non-contact electric power transmission apparatus of this invention. It is a graph which shows the noise suppression measurement result of the non-contact electric power transmission apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a configuration diagram of a non-contact power transmission apparatus according to the present invention. FIG. 2 is a diagram illustrating the configuration of the first coil, the second coil, and the magnetic body of the contactless power transmission device according to the first embodiment of the present invention. FIG. 2 (a) is a schematic diagram, and FIG. b) is a sectional view.

  A non-contact power transmission apparatus 10 shown in the configuration diagram of FIG. 1 includes a first coil 11 for performing power transmission and signal transmission on a first housing 14 having a first coil, and the first coil 11. A first transmission / reception circuit 19 for switching between transmission and reception of power transmission and signal transmission, a power supply circuit 16 for power transmission, and a first signal communication circuit 17 for signal transmission are installed. A second casing 15 having a second coil, a second coil 12 for performing power transmission and signal transmission, and a second transmission / reception circuit for switching transmission / reception of power transmission and signal transmission by the second coil 12 20, a charging control circuit 21 for power transmission, a secondary battery 22 for charging, and a second signal communication circuit 18 for signal transmission are installed.

  The first housing having the first coil of the contactless power transmission device includes means for converting electrical energy into magnetic energy, and the second housing having the second coil converts magnetic energy into electrical energy. Means. Power transmission is performed as described above. In addition, signals such as RFID are transmitted and received using a circuit that separates power transmission. Both the transmission of electric power and the transmission / reception of signals such as RFID are possible at the same 13.56 MHz frequency.

  As shown in FIG. 2, the first magnetic body 33a, the second magnetic body 34a, and the third magnetic body are formed on the back surface of the first coil 31 formed by winding a copper wire to form a flat plate coil. Each of the bodies 35a is formed in a circular shape and laminated to be arranged as the first magnetic layer 36. Similarly, on the back surface of the second coil 32 in which a copper wire is wound to form a flat plate coil, In this structure, the first magnetic body 33b, the second magnetic body 34b, and the third magnetic body 35b are formed in a circular shape and stacked, and the second magnetic body layer 37 is disposed.

  The first magnetic bodies 33a and 33b need to have a high magnetic flux density in order to increase transmission power, and have a characteristic of a complex relative permeability real part of 200 or more or a saturation magnetic flux density of 4000 G or more. Is used. The second magnetic bodies 34a and 34b need to reduce the propagation loss and increase the magnetic flux density in order to increase the data communication distance, and the characteristics are complex relative permeability real part 100 to 200 and complex relative permeability. A sheet-like magnetic body having an imaginary part of 10 or less is used. The second magnetic bodies 34a and 34b have a ferrite frequency reduced to a crystal grain size of 2 μm or less, a Snoek limit, and a permeability frequency characteristic, in order to realize a magnetic body that satisfies this characteristic. increase. The third magnetic bodies 35a and 35b suppress the near magnetic field generated in the vicinity of the coil as a noise countermeasure, and prevent the unnecessary harmonic noise that is conducted to other devices. Therefore, a magnetic material having characteristics having a complex relative permeability imaginary part 10 or more is used.

  Thus, although the structure which has arrange | positioned the magnetic body in three layers on the back surface of the 1st coil and the 2nd coil was shown, the structure which changed the arrangement | positioning order of a magnetic body may be sufficient. Further, a single-layer structure or a structure of four or more layers may be used depending on the mounted device. Further, the third magnetic body may be arranged on a circuit installed in the first housing 14 and the second housing 15. Moreover, in this structure, although the same magnetic body was used for the 1st magnetic bodies 33a and 33b, you may use a different magnetic body. Similarly, the second magnetic bodies 34a and 34b may be the same magnetic body or different magnetic bodies. Similarly, the third magnetic bodies 35a and 35b may be the same magnetic body or different magnetic bodies.

  In the present embodiment, the shapes of the first coil 31 and the second coil 32 have been described as circular, but there is no problem with polygons or the like. Accordingly, the first magnetic layer 36 and the second magnetic layer 37 have also been described as having a circular shape, but there is no problem with a polygon or the like.

  It is efficient that the first coil 31, the second coil 32, the first magnetic layer 36, and the second magnetic layer 37 are configured in the same size. In the case where the first coil 31 and the first magnetic layer 36 are larger, the efficiency is reduced, but the size of the second coil 32 and the second magnetic layer 37 is set to the second size. The size can be reduced according to the size of the casing 15. Further, when the second casing 15 is changed, various second casings 15 can be handled, and the combination of the first casing 14 and the second casing 15 is not limited. Instead, the plurality of second casings 15 correspond to the first casing 14, and the non-contact power transmission device 10 of the present invention can be highly versatile. Furthermore, the non-contact power transmission device including the first coil is used as a charging device for a portable terminal device such as a mobile phone, and the non-contact power transmission device including the second coil is a mobile phone or the like. Various applications are possible, such as being used as a portable terminal device.

(Embodiment 2)
FIG. 3 is a diagram illustrating the configuration of the first coil, the second coil, and the magnetic body of the contactless power transmission device according to the second embodiment of the present invention. FIG. 3 (a) is a schematic diagram, and FIG. b) is a sectional view. FIG. 3 illustrates the configuration of the first coil, the second coil, and the magnetic body of the non-contact power transmission apparatus according to the second embodiment of the present invention. As shown in FIG. 3, the first magnetic body 43a, the second magnetic body 44a, and the third magnetic body are formed on the back surface of the first coil 41 formed by winding a copper wire to form a flat plate coil. A body 45a is formed in a ring shape and arranged as a first magnetic ring 46 that is concentric with the same plane, and is similarly wound on the back surface of a second coil 42 that is formed by winding a copper wire to form a flat plate coil. The first magnetic body 43b, the second magnetic body 44b, and the third magnetic body 45b are formed in a ring shape, and a concentric second magnetic ring 47 is arranged on the same plane.

  In this way, the magnetic body is formed in a ring shape on the back surface of the first coil and the second coil, and the thickness of the magnetic body is reduced by arranging three layers concentrically on the same plane, so that contactless power transmission is possible. Although the thin structure of the device is shown, a structure in which the arrangement order of the magnetic bodies is changed may be used. Further, a double structure or a structure of four or more layers may be used depending on the mounted device.

  As described above, the magnetic body is formed in a ring shape on the back surfaces of the first coil part and the second coil part, and the structure in which the magnetic bodies are arranged in a concentric triple on the same plane is shown. A changed structure may be used. Further, a single structure or a structure of four or more may be used depending on the mounted device. Further, the third magnetic body may be arranged on a circuit installed in the first housing 14 and the second housing 15. Moreover, in this structure, although the same magnetic body was used for the 1st magnetic bodies 43a and 43b, you may use a different magnetic body. Similarly, the second magnetic bodies 44a and 44b may be the same magnetic body or different magnetic bodies. Similarly, the third magnetic bodies 45a and 45b may be the same magnetic body or different magnetic bodies.

  In the present embodiment, the shapes of the first coil 41 and the second coil 42 have been described as circular, but there is no problem with a polygon or the like. Accordingly, the first magnetic ring 46 and the second magnetic ring 47 have been described as circular in shape, but there is no problem with a polygon or the like.

  It is efficient that the first coil 41, the second coil 42, the first magnetic ring 46, and the second magnetic ring 47 are configured in the same size. In the case where the first coil 41 and the first magnetic ring 46 are larger, the efficiency is reduced, but the size of the second coil 42 and the second magnetic ring 47 is set to the second size. The size can be reduced according to the size of the casing 15. Further, when the second casing 15 is changed, various second casings 15 can be handled, and the combination of the first casing 14 and the second casing 15 is not limited. Instead, the plurality of second casings 15 correspond to the first casing 14, and the non-contact power transmission device 10 of the present invention can be highly versatile. Furthermore, the non-contact power transmission device including the first coil is used as a charging device for a portable terminal device such as a mobile phone, and the non-contact power transmission device including the second coil is a mobile phone or the like. Various applications are possible, such as being used as a portable terminal device.

  Hereinafter, it explains in full detail using an Example.

Of the above embodiments, examples of the non-contact power transmission apparatus according to the first embodiment shown in FIGS. 1 and 2 will be described in detail. First, as the first coil, a first coil 31 and a second coil 32 each having a diameter of 30 mm, in which a copper wire was wound for 4 turns, were used. As the first magnetic bodies 33a and 33b, an Fe—Si—Al-based alloy was used to produce a flat powder having an average aspect ratio of 30 and a silicone resin content of 5 wt. %, And a magnetic material molded into a circular sheet having a thickness of 0.1 mm was used. As the second magnetic bodies 34a and 34b, NiZn ferrite was used, and a magnetic body obtained by refining the grain size and molding a powder having an average crystal grain size of 1.7 μm into a circular sheet shape having a thickness of 0.1 mm was used. As the third magnetic body 35a, a fine flat powder having an average aspect ratio of 35 was prepared using an Fe—Si—Al-based alloy, and a content of 15 wt. %, And a magnetic material molded into a circular sheet having a thickness of 0.1 mm was used. The as third magnetic 35b, FeCl ₂ · _{4H 2 O} in deoxygenated ion exchange water, NiCl ₂ · 6H ₂ O, and the reaction solution prepared by dissolving ZnCl _2, NaNO ₂ and _CH 3 COONH ₄ deoxygenated deionized water A plating film having a thickness of 0.003 mm having an average composition of Ni _0.2 Zn _0.3 Fe _2.5 O _4.0 formed by spraying with a nozzle was used.

The first magnetic bodies 33a and 33b have a saturation magnetic flux density characteristic of 5000G. The second magnetic bodies 34 a and 34 b have characteristics of a complex relative permeability real part 120 and a complex relative permeability imaginary part 3. The third magnetic body 35 a has the characteristics of the complex relative permeability imaginary part 24.
The third magnetic body 35 b has the characteristics of the complex relative permeability imaginary part 20.

  About the Example of the non-contact electric power transmission apparatus produced by said point, the power transmission efficiency, the data communication distance, and the noise suppression effect were measured, and it compared with the Example before arrange | positioning a magnetic body. The comparison was made in the same manner as the non-contact power transmission device of the example, and a non-contact power transmission device in which the magnetic body was not installed in the first coil and the second coil.

  FIG. 4 is a graph showing the power transmission efficiency measurement result of the non-contact power transmission apparatus of the present invention. A 13.56 MHz sine wave signal from the transmitter was amplified via a power amplifier and input to the first coil to be excited. A second coil with a 50Ω load resistance connected between the output terminals of the second coil is brought into contact with the first coil, and the current generated in the second coil at that time is measured by a current probe connected to the oscilloscope. Measured and calculated effective output power. The power transmission efficiency was calculated from the ratio with the effective input power of the first coil. As a result, with respect to the charging power transmission efficiency, the efficiency of 70% was improved to 90% compared to before the first magnetic layer 36 and the second magnetic layer 37 were arranged.

  FIG. 5 is a graph showing a communication distance measurement result of the non-contact power transmission apparatus of the present invention. As the RFID reader / writer antenna, a first coil was used to excite a 13.56 MHz data signal. A temporary RFID card was created by connecting the IC chip for RFID and the second coil, and using the second coil as an antenna. Whether the provisional RFID card can communicate with the RFID reader / writer using the first coil as an antenna, the distance of the first coil was moved in the vertical direction, and the maximum communicable distance was measured. The comparison was made assuming that the distance before the magnetic material is arranged is 100%. The data communication distance was improved to 105% compared to before the first magnetic layer 36 and the second magnetic layer 37 were arranged.

  FIG. 6 is a graph showing noise suppression measurement results of the non-contact power transmission apparatus of the present invention. In the conduction noise measurement, the magnetic material of the present invention was placed in the first coil, and 1 mW of power was input from a network analyzer to one end of the first coil with a microprobe to give excitation power. The attenuation of transmitted power from the other end of the first coil was measured with a network analyzer. In the near magnetic field noise measurement, the magnetic material of the present invention was arranged in the first coil, and 1 mW of power was input from a network analyzer to one end of the first coil with a microprobe to give excitation power. The other end of the first coil is terminated with a load resistance of 50Ω, and an electric field probe in which the magnetic field of the first coil is connected to the network analyzer is arranged at a height of 1 mm of the first coil and magnetically coupled as transmitted power. The amount was measured. The same measured value before placing the magnetic material was compared as a reference (0 dB). The noise suppression effect is that conduction noise is suppressed by 2.3 dB and near magnetic field noise is suppressed by 1 dB at 2 GHz, which is the RF antenna usage frequency of the mobile phone, as compared with the case before the first magnetic layer is disposed. all right.

  From the above measurement results, it can be seen that the non-contact power transmission apparatus of the present invention improves the power transmission efficiency and the signal communication distance, and suppresses conduction noise and near magnetic field noise, compared with the comparative product.

  The embodiments of the present invention have been described above using the examples. In the embodiments, the shapes of the hollow portions of the first coil and the second coil have been described as a substantially circular shape and a substantially quadrangular shape, but there is no problem with a polygonal shape. Moreover, although the convex part cross section of the magnetic body which has a convex part was demonstrated with the substantially circular shape and the substantially square shape, it is satisfactory even if it is a polygon. In short, the present invention is not limited to this embodiment, and design changes within a range not departing from the gist of the present invention are included in the present invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to these embodiments, and the present invention is not limited to the scope of the present invention. Included in the invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  The non-contact charging device of the present invention can be used for portable devices such as a mobile phone, a headset, a digital camera, and a digital video. It can also be applied to charging that requires high power, such as cars and buses.

DESCRIPTION OF SYMBOLS 10 Contactless power transmission apparatus 11 1st coil 12 2nd coil 14 1st housing 15 2nd housing 16 Power supply circuit 17 1st signal communication circuit 18 2nd signal communication circuit 19 1st transmission / reception circuit 20 Second transmission / reception circuit 21 Charging control circuit 22 Secondary battery 31 First coil 32 Second coils 33a, 33b First magnetic bodies 34a, 34b Second magnetic bodies 35a, 35b Third magnetic bodies 36 First Magnetic layer 37 second magnetic layer 41 first coil 42 second coils 43a, 43b first magnetic bodies 44a, 44b second magnetic bodies 45a, 45b third magnetic bodies 46 first magnetism Body ring 47 Second magnetic ring

Claims (12)

  A non-contact power transmission device that transmits electric power to a first coil and a second coil disposed to face the first coil, the first coil and a side facing the second coil; Arranges at least two or more magnetic bodies on the opposite surfaces of the first coil and the second coil, and the first coil and the second coil have functions and signals for transmitting the power. A non-contact power transmission device having a function of transmitting and receiving.   The magnetic body includes a first magnetic body having a complex relative permeability real part of 200 or more or a saturation magnetic flux density of 4000 G or more; a second complex relative permeability real part of 100 to 200 and a complex relative permeability imaginary part of 10 or less. 2. The non-contact power transmission device according to claim 1, comprising at least two of the magnetic bodies and a third magnetic body having a complex relative permeability imaginary part of 10 or more. .   3. The arrangement of at least two of the first magnetic body, the second magnetic body, and the third magnetic body is a laminated structure. The non-contact power transmission device described in 1.   The arrangement of at least two of the first magnetic body, the second magnetic body, and the third magnetic body is a configuration in which magnetic bodies formed in a ring shape are arranged on the same plane. The contactless power transmission device according to claim 1, wherein the contactless power transmission device is provided.   2. The first magnetic body, the second magnetic body, and the third magnetic body are formed in a sheet shape, or formed by plating, vapor deposition, or sputtering. The non-contact electric power transmission apparatus in any one of -4.   The first magnetic body is characterized by mixing a flat soft magnetic powder having a flat shape and a silicone resin having a siloxane bond (Si-O-Si), and having an in-plane easy magnetization direction. The non-contact power transmission device according to claim 1.   7. The non-magnetic material according to claim 1, wherein the second magnetic body is prepared by firing ferrite powder having a crystal grain size of 2 μm or less and has strong magnetization in a rotational magnetization range. Contact power transmission device.   The non-contact power transmission device according to claim 1, wherein the third magnetic body is composed of a composite magnetic body in which a magnetic powder is mixed in a resin having heat shrinkability.   The third magnetic body includes a step of bringing a reaction solution containing at least ferrous ions into contact with the substrate, a step of bringing an oxidation solution containing at least an oxidizing agent into contact with the substrate, and an inner magnetism of the reaction solution and the oxidation solution. The non-contact power transmission device according to claim 1, wherein the non-contact power transmission device is created from a step of removing a residue that does not contribute to body generation from the substrate.   A non-contact power transmission device that transmits electric power to a first coil and a second coil disposed to face the first coil, the first coil and a side facing the second coil; Is arranged on the opposite surfaces of the first coil and the second coil with a magnetic body having a complex relative magnetic permeability real part 200 or more or a saturation magnetic flux density 4000 G or more, and the first coil and the second coil The non-contact power transmission device, wherein the coil has a function of transmitting the power and a function of transmitting and receiving signals.   The charging device constituting the non-contact power transmission device according to claim 1, comprising the first coil.   The portable terminal device which comprises the non-contact electric power transmission apparatus of Claims 1-10 provided with said 2nd coil.

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