WO2010126010A1 - Transmission system - Google Patents

Abstract

A non-contact transmission system comprises: a power supply device (1) that supplies power induced by the magnetic flux (Φa) generated by the passage of a high-frequency current through a primary coil (10); a power receiving device (2) that receives power by means of a secondary coil (20); and a relay device (3) equipped with a closed circuit constituted by a single expansion coil (30) and an impedance element (31). The secondary coil (20) is electromagnetically coupled with the primary coil (10) through the expansion coil (30) of the relay device (3). The relay device (3) is arranged so as to extend the distance between the power supply device (1) and the power receiving device (2) in the vertical direction and/or horizontal direction.

Description

Transmission system

The present invention relates to a contactless transmission system.

Conventionally, there has been a non-contact power supply system used for charging mobile devices such as electric toothbrushes and mobile phones. As shown in FIG. 1, the power supply system includes a primary coil 10, a power supply device 1 that generates a magnetic flux Φa by flowing a high-frequency current from a high-frequency inverter 11 through the primary coil 10, and a load (for example, a charge) Battery) 21 and a secondary coil 20, and a power receiving device 2 that supplies induced current generated in the secondary coil 20 to the load 21. The secondary coil 20 generates magnetic flux Φa generated in the primary coil 10. As a result, the induced current is generated, and power is supplied to the load 21. However, in this power feeding system, in order to link the magnetic flux Φa generated in the primary coil 10 to the secondary coil 20, it is necessary to bring them close to each other. As a result, the position where the power receiving device 2 is placed is also shown in FIG. As shown in the figure, the magnetic flux Φa generated in the primary coil 10 is limited to a range interlinked with the secondary coil 20. For example, when the power receiving device 2 is placed at the position shown in FIG. Power supply was difficult.

Therefore, in recent years, a power supply system that can supply power to the power receiving device even when the power supply device and the power receiving device are separated has been provided (see, for example, Patent Documents 1 and 2). In these power feeding systems, a conversion comprising a receiving coil for linking the magnetic flux generated in the primary coil of the power feeding device and a feeding coil for generating a magnetic flux linked to the secondary coil of the power receiving device. A plug is provided, and by interposing this conversion plug between the power supply device and the power receiving device, power can be supplied to the power receiving device even when the power supply device and the power receiving device are separated from each other.

JP 2007-60829 A (paragraph [0038] -paragraph [0044] and FIG. 5) JP 2001-275281 (paragraph [0027] -paragraph [0036] and FIG. 6)

In the power supply systems shown in Patent Documents 1 and 2 described above, power can be supplied to the power receiving device even when the power supply device and the power receiving device are separated from each other. However, the magnetic flux generated by the primary coil of the power supply device is reduced. Since a receiving side coil for interlinking and a feeding side coil for generating a magnetic flux to be interlinked with a secondary coil of a power receiving device are required separately, and a core is used to suppress leakage magnetic flux. The conversion plug was increased in size and increased in cost.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a small transmission system capable of expanding a transmission range while suppressing an increase in cost.

One aspect of the present invention is a contactless transmission system. The transmission system includes a primary coil and a transmission side device that sends power or an electric signal corresponding to a magnetic flux generated by flowing a high-frequency current through the primary coil, and a secondary coil, and the power is transmitted by the secondary coil. Or a receiving device that receives an electrical signal, and one or a plurality of relay devices each having a closed circuit composed of a single extension coil and an impedance element, wherein the secondary coil is the one Alternatively, the primary coil is electromagnetically coupled via at least one extension coil of a plurality of relay devices, and the one or more relay devices increase or decrease the distance between the sending device and the receiving device. It arrange | positions so that it may extend to at least one of a direction and a horizontal direction.

According to this configuration, the shape and size of the primary coil are the same as those of the conventional example, but the receiving device is arranged via the expansion coil of the relay device even if the receiving device is arranged at a location away from the primary coil. Power and electrical signals can be transmitted. Therefore, restrictions on the arrangement location of the receiving device are reduced, and an easy-to-use transmission system can be provided. Furthermore, the relay device may be provided with a single extension coil, and it is not necessary to provide the relay device with two coils corresponding to the coil of the sending device and the coil of the receiving device as in the conventional example. Therefore, a small transmission system can be constructed while suppressing an increase in cost.

Preferably, the one or more relay devices are constituted by a plurality of relay devices, and the plurality of relay devices are interposed between the sending side device and the receiving side device.
According to this configuration, it is possible to construct a transmission system according to various applications by preparing a plurality of types of relay devices having different shapes and sizes of the expansion coils.

Preferably, the extension coil is arranged so as to be partially close to a part of the primary coil.
According to this structure, a secondary coil can be arrange | positioned in the position where both the magnetic flux of a primary coil and the magnetic flux of an expansion coil link. Thereby, the induction current generated in the secondary coil can be increased, and the transmission efficiency to the receiving device can be increased.

Preferably, the position of the one or more relay devices can be changed with respect to the sending device according to the position of the receiving device.
According to this structure, the freedom degree of arrangement | positioning of a receiving side apparatus can be improved.

Preferably, the feeding side device and the one or more relay devices constitute an integral feeding means by arranging the primary coil and the extension coil close to each other, and the feeding device The means can be folded between adjacent coils.

According to this configuration, the range of the feeding means can be set large by expanding it during use, and the storage space can be reduced by folding it when not in use.
Preferably, the one or more relay devices are configured by a plurality of relay devices, and the extension coils of the plurality of relay devices are in a state of being partially close to a part of the primary coil. It arrange | positions so that the said primary coil may be surrounded.

According to this configuration, the distance between the primary coil and each expansion coil is substantially equal. Therefore, the magnetic flux generated in each expansion coil is a uniform and stable magnetic flux. Therefore, the same level of power and electrical signals can be received from any relay device.

Preferably, the extension coil and the primary coil are arranged close to each other and have a coil shape such that the adjacent coil portions are parallel to each other.
According to this configuration, the gap between the coils is reduced, and as a result, the magnetic flux can be efficiently linked. For this reason, it becomes possible to arrange | position a some relay apparatus along a plane direction, and can extend the electric power feeding distance in a plane direction.

Preferably, the coil shape is a polygon or a polyhedron.
According to this configuration, the gap between the coils can be reduced, and the magnetic flux can be efficiently linked.

Preferably, the one or more relay devices are configured by a plurality of relay devices, and the plurality of relay devices include a coil surface of the extension coil of the plurality of relay devices and a coil surface of the primary coil. It arrange | positions between the said sending apparatus and the said receiving apparatus so that the coil surface of the said secondary coil may be opposed.

According to this configuration, even if the distance between the sending side device and the receiving side device is longer than that of the conventional example, it is possible to transmit electric power and electric signals by the plurality of relay devices.
Preferably, the one or more relay devices are configured by a plurality of relay devices, and the plurality of relay devices have coil surfaces of the extension coils of the plurality of relay devices facing each other, and the 1 It arrange | positions with respect to the said receiving side apparatus on the opposite side to the said sending side apparatus so that the coil surface of a secondary coil and the coil surface of the said secondary coil may oppose.

According to this configuration, even if the distance between the sending side device and the receiving side device is longer than that of the conventional example, it is possible to transmit electric power and electric signals by the plurality of relay devices.
Preferably, the one or more relay devices are configured by a plurality of relay devices including first and second relay devices, and the first and second relay devices are the first relay device. The coil surface of the extension coil faces the first coil surface of the primary coil, and the coil surface of the extension coil of the second relay device faces the second coil surface of the primary coil. , Arranged on both sides of the sending side device.

According to this configuration, the transmission range can be further expanded by using the magnetic fluxes on both sides of the sending device.
Preferably, the sending device is one of a plurality of sending devices provided in the transmission system, and the one or more relay devices are configured by a plurality of relay devices, Each of the relay devices is arranged so as to be close to at least one of the plurality of sending side devices.

According to this structure, attenuation of the magnetic flux linked to each expansion coil can be suppressed. As a result, power and electrical signals can be received from any relay device.
Preferably, the impedance element is a capacitor that forms a resonance circuit together with the expansion coil.

According to this configuration, it is possible to increase the current flowing through the expansion coil due to resonance between the capacitor and the expansion coil, thereby generating more magnetic flux in the expansion coil. For this reason, the transmission range can be further expanded.

Preferably, at least one of the one or more relay devices includes a load operated by electric power or an electric signal corresponding to magnetic flux generated in a primary coil of the sending device.
According to this configuration, it is possible to realize a relay device having not only a function of transmitting electric power and an electric signal from the sending device to the receiving device, but also a load driving function.

Preferably, the expansion coil is an air-core coil.
According to this configuration, since the air-core coil has high power resistance and small inductance, a non-contact transmission system using high frequency can be suitably realized.

Preferably, the extension coil made of a planar coil and the impedance element made of a chip element are arranged on the same plane.
According to this configuration, a thin relay device can be realized.

Preferably, the receiving device includes a light emitting diode as a load, and the sending device supplies power to the receiving device via the one or more relay devices.
According to this configuration, by using a light emitting diode with low power consumption as a load, it is possible to realize a lighting device with high luminance while suppressing running cost.

Preferably, the sending device is operable by a battery.
According to this configuration, a cordless transmission system can be realized by supplying power from the battery to the sending device. As a result, the present system can be used as a mobile system or used in different places.

Preferably, the sending device and the one or more relay devices are configured as puzzle pieces having different shapes.
According to this configuration, the system can be constructed while enjoying the system.

It is a schematic diagram of the conventional non-contact-type electric power feeding system. (A), (b) is a schematic diagram explaining operation | movement of the conventional non-contact-type electric power feeding system. (A), (b) is the schematic diagram of the transmission system of Embodiment 1. FIG. (A)-(e) is a schematic diagram explaining the operation principle of the transmission system of Embodiment 1. FIG. (A)-(c) is a schematic diagram which shows the example of the transmission system of Embodiment 1. FIG. (A)-(e) is a schematic diagram which shows the other example of the transmission system of Embodiment 1. FIG. (A), (b) is a schematic diagram which shows the further another example of the transmission system of Embodiment 1. FIG. (A), (b) is a schematic diagram of the transmission system of Embodiment 2. FIG. (A), (b) is a schematic diagram of the electric power feeding apparatus and relay apparatus which are used for the transmission system of Embodiment 3, (c) shows the other example of the coil for an extension used for the transmission system of Embodiment 3. FIG. It is a perspective view. (A), (b) is a schematic diagram explaining the structure of the electric power feeder and relay apparatus used for the transmission system of Embodiment 4. FIG. (A), (b) is a schematic diagram explaining the transmission system of Embodiment 5. FIG. (A) is a schematic diagram which shows the example of the electric power feeding system using the transmission system of Embodiment 5, (b) is a partial detail drawing of Fig.12 (a). (A), (b) is a schematic diagram which shows the example using the transmission system of Embodiment 6. FIG. FIG. 10 is a schematic diagram of a transmission system according to a seventh embodiment. FIG. 10 is a schematic diagram of a relay device used in the transmission system according to the seventh embodiment. FIG. 10 is a schematic diagram of a transmission system according to an eighth embodiment. 10 is a schematic diagram of a transmission system according to Embodiment 9. FIG. FIG. 16 is a schematic diagram of a transmission system according to a tenth embodiment.

Embodiments of a transmission system according to the present invention will be described with reference to the drawings. In the following, a power supply system that supplies power to a device on the power receiving side will be described as an example. However, the transmission system according to the present invention is not limited to the power supply system, and is a system that transmits an electrical signal or the like. May be.

(Embodiment 1)
FIG. 3 shows an example of the power feeding system according to the first embodiment. The power feeding system includes a power feeding device 1 that supplies power, a power receiving device 2 that receives power transmitted from the power feeding device 1, and a relay device 3 that relays between the power feeding device 1 and the power receiving device 2. Here, in the first embodiment, the feeding device 1 constitutes the sending device, and the power receiving device 2 constitutes the receiving device.

The power supply device 1 includes a primary coil 10 formed of an air-core coil wound in a spiral shape, and a high-frequency inverter 11 for applying a high-frequency current to the primary coil 10. A high-frequency current is supplied to the primary coil 10. By applying the magnetic flux Φa, the primary coil 10 is linked to the magnetic flux Φa. The high frequency inverter 11 is supplied with power from a commercial power source.

Similarly to the primary coil 10, the power receiving device 2 is connected to both ends of the secondary coil 20, which is a spirally wound air-core coil, and the secondary coil 20, and power is transmitted through the secondary coil 20. And a load (for example, a light emitting diode) 21 to be supplied. A capacitor 22 is further connected between both ends of the secondary coil 20.

The relay device 3 includes a closed circuit composed of an extension coil 30 formed of an air-core coil spirally wound in the same manner as the primary coil 10 and an impedance element 31, and is a power supply on the power supply side. It plays a role of relaying power between the device 1 and the power receiving device 2 on the power receiving side.

Here, FIG. 3A shows an arrangement example in which the coils 10, 20, and 30 are arranged so as to be partially close to a part of adjacent coils. The expansion coil 30 is disposed close to the primary coil 10 such that the winding axis direction is orthogonal to the winding axis direction of the primary coil 10. However, the extension coil 30 and the primary coil 10 do not overlap. The secondary coil 20 is disposed close to the expansion coil 30 so that the winding axis direction is oblique to the winding axis direction of the expansion coil 30. Note that by arranging the coils 10 to 30 as shown in FIG. 3A, the magnetic flux generated at the peripheral edge of each coil can be used effectively.

On the other hand, FIG. 3B shows an arrangement example in which a plurality (two in this example) of expansion coils 30 are arranged. The first extension coil 30 is disposed close to the primary coil 10 such that the winding axis direction thereof is orthogonal to the winding axis direction of the primary coil 10. The second extension coils 30 are arranged side by side so that the winding axis direction thereof is parallel to the winding axis direction of the first extension coil 30. Further, the secondary coil 20 is arranged such that its coil surface faces the coil surface of the second expansion coil 30.

3A and 3B, the power receiving device 2 can receive power via the primary coil 10 of the power feeding device 1 as well as via the expansion coil 30 of the relay device 3. Power can be received. Therefore, power can be supplied at a position away from the power supply device 1 and the degree of freedom of arrangement of the power reception device 2 is increased.

Here, the power feeding device 1, the power receiving device 2, and the relay device 3 are configured as separate devices in a form of being housed in a case (not shown). For example, when the load 21 of the power receiving device 2 is a rechargeable battery, the power receiving device 2 is arranged at an arbitrary position where the magnetic flux of the power feeding device 1 or the relay device 3 arranged at a predetermined position is linked at the time of charging. Will do.

Next, the operating principle of the power supply system will be described with reference to FIG. FIG. 4A shows a state in which the primary coil 10 and the expansion coil 30 are arranged so that their coil surfaces face each other. In this state, when a high-frequency current is applied to the primary coil 10 by the high-frequency inverter 11, a magnetic flux Φa is generated so as to link the primary coil 10. When this magnetic flux Φa is linked to the expansion coil 30, an induced electromotive force E is generated between both ends of the expansion coil 30 in accordance with Faraday's law of electromagnetic induction.

FIG. 4B shows a state in which an impedance element (such as a resistor) 31 is connected between both ends of the expansion coil 30. Current Ia flows through the impedance element 31 by the induced electromotive force E. Furthermore, the current Ia also flows through the expansion coil 30 connected in series with the impedance element 31, and a magnetic flux Φb is generated in the form of linking the expansion coil 30. The magnetic flux Φb is generated so as to cancel the magnetic flux change of the primary coil 10 according to Lenz's law.

Incidentally, the magnetic flux Φb generated by the current Ia includes a magnetic flux generated so as to link the primary coil 10 and a magnetic flux Φb linked only to the expansion coil 30, and the latter magnetic flux is referred to as a leakage magnetic flux. The inductance that generates this leakage magnetic flux is called leakage inductance. When power is supplied by electromagnetic induction, the primary coil and the secondary coil (in this example, the expansion coil 30) are separated and magnetically coupled, so that the self-inductance and leakage inductance of the secondary coil are close to each other. There are many cases.

FIG. 4C shows an arrangement example in which a plurality (two in this example) of expansion coils 30 are arranged side by side. In this case, the leakage magnetic flux Φb generated in the first expansion coil 30 disposed opposite to the primary coil 10 is linked to the adjacent second expansion coil 30, and further this second expansion coil 30. The leakage magnetic flux Φb generated in the above is linked to the secondary coil 20. As a result, an induced electromotive force is generated in the secondary coil 20 as described above, and an induced current can be passed through the load 21 connected to the secondary coil 20. That is, the first expansion coil 30 is arranged so that the magnetic flux Φa of the primary coil 10 is linked, and the leakage magnetic flux Φb generated in the first expansion coil 30 is used to supply power Power can be supplied at a position away from 1, and the degree of freedom of arrangement of the power receiving device 2 is increased.

4D, a capacitor is used as the impedance element 31 in FIG. 4C, and the capacitor and the expansion coil 30 constitute a resonance circuit that resonates with the operating frequency of the high-frequency inverter 11. In this configuration, the induced current flowing through the expansion coil 30 increases, and more magnetic flux can be generated. Therefore, when a power supply system is configured via a plurality of relay devices 3, it is preferable to configure a resonance circuit in consideration of the attenuation of magnetic flux in each expansion coil 30. In this case, it is preferable to use a capacitor for the impedance element 31.

FIG. 4E shows another example using a plurality of expansion coils 30. In FIG. 4D described above, the secondary coil 20 is arranged side by side with respect to the terminal expansion coil 30. In FIG. 4E, the coil surface of the terminal expansion coil 30 and the secondary coil 20 are arranged. It arrange | positions so that the coil surface of this may oppose. In this case as well, power can be supplied at a position away from the power supply device 1 and the degree of freedom of arrangement of the power reception device 2 is increased.

FIG. 5 shows a specific example of a power feeding system using the above operating principle. In FIG. 5A, the power feeding device 1 and the relay device 3 are arranged so that the winding axis direction of the primary coil 10 and the winding axis direction of the expansion coil 30 coincide. Further, the relay device 3 and the power receiving device 2 are arranged side by side so that the winding axis direction of the extension coil 30 and the winding axis direction of the secondary coil 20 do not match (do not overlap). At this time, the magnetic flux Φa of the primary coil 10 is linked to the expansion coil 30, and the leakage magnetic flux Φb of the expansion coil 30 is linked to the secondary coil 20.

On the other hand, in FIG. 5B, the feeding device 1 and the first and second power supply devices 1 and 2 are arranged so that the winding direction of the primary coil 10 and the winding direction of the first and second extension coils 30 do not overlap. The relay device 3 is arranged side by side. Further, the second (that is, terminal) repeater device 3 and the power receiving device 2 are arranged such that the coil surface of the second (that is, terminal) extension coil 30 and the coil surface of the secondary coil 20 face each other. Is arranged. At this time, the leakage magnetic flux Φa of the primary coil 10 is linked to the first expansion coil 30 that is disposed close to the primary coil 10. Further, the leakage magnetic flux Φb of the adjacent first expansion coil 30 is linked to the second expansion coil 30 disposed in proximity to the first expansion coil 30. Further, the magnetic flux Φb of the second expansion coil 30 is linked to the secondary coil 20.

5A and 5B, by interposing the relay device 3, it is possible to supply power at a position away from the power supply device 1, and the degree of freedom of arrangement of the power reception device 2 is increased. . In FIG. 5C, a load (for example, a light emitting diode) 32 is provided in the relay device 3 in the power supply system of FIG. Thus, by providing the load 32 on the relay device 3, the function of transmitting the power sent from the power feeding device 1 to the power receiving device 2 and the function of operating the load 32 with a part of the power sent from the power feeding device 1 are provided. The provided relay device 3 can be realized.

Here, in the power supply system of the first embodiment, the power supply device 1 and the relay device 3 are separate, and therefore the position of the relay device 3 relative to the power supply device 1 can be changed according to the position of the power reception device 2. Therefore, it is possible to easily construct a power supply system according to the arrangement of the power receiving device 2.

FIG. 6 shows another example of the power feeding system according to the first embodiment. 6 (a), FIG. 6 (d), and FIG. 6 (e) include one power supply device 1 and one power reception device 2, and a plurality (two in this example) of relay devices 3. It has. In FIG. 6A, the power feeding device 1 and the first relay device 3 are arranged side by side so that the winding axis direction of the primary coil 10 and the winding axis direction of the first extension coil 30 are parallel to each other. ing. Further, the first and second relay devices 3 and 3 are arranged to face each other with the coil surfaces of the first and second extension coils 30 facing each other. Further, the second relay device 3 and the power receiving device 2 are arranged side by side so that the winding axis direction of the second extension coil 30 and the winding axis direction of the secondary coil 20 are parallel to each other. In the example of FIG. 6A, the leakage flux Φa of the primary coil 10 links the first extension coil 30. Further, the magnetic flux Φb generated in the first expansion coil 30 links the second expansion coil 30. Furthermore, the leakage flux Φb generated in the second expansion coil 30 links the secondary coil 20.

On the other hand, in FIG.6 (d), the winding direction of the primary coil 10, the secondary coil 20, and the 1st and 2nd expansion coils 30 and 30 is parallel, and the electric power feeder 1, the receiving device 2, In addition, the first and second relay devices 3 and 3 are arranged side by side. In the example of FIG. 6D, the leakage magnetic flux of the adjacent coil is linked to each coil. 6 (a) and 6 (d), by using the leakage magnetic flux of the primary coil 10, it is possible to supply power at a position away from the power supply device 1, and The degree of freedom of arrangement increases. In FIG. 6 (e), a lamp is used for the load 21 in FIG. 6 (d), and the operation principle is the same as in FIG.

6 (b) and 6 (c) are configurations in which one relay device 3 is reduced from FIGS. 6 (d) and 6 (e), respectively, the description thereof is omitted here. . Note that by arranging each coil as shown in FIGS. 6B to 6E, the magnetic flux generated at the peripheral edge of the coil can be used effectively.

FIG. 7 shows still another example of the power feeding system according to the first embodiment. This power feeding system includes one power feeding device 1 and one power receiving device 2 each, and a plurality (three in this example) of relay devices 3. In FIG. 7A, the power feeding device 1 and the first to third relay devices 3 are formed so that the winding direction of the primary coil 10 and the winding direction of the first to third extension coils 30 are parallel to each other. Are arranged side by side. Further, the third (that is, terminal) relay device 3 and the power receiving device 2 are arranged so that the coil surface of the secondary coil 20 faces the coil surface of the third (that is, terminal) extension coil 30. ing. Note that FIG. 7B is obtained by adding one relay device 3 to the above-described FIG.

In the case of FIG. 7, as compared with the power supply system of FIG. 6, power can be supplied at a position further away from the power supply device 1, and the degree of freedom of arrangement of the power reception device 2 is increased. Also, in FIGS. 7A and 7B, the three expansion coils 30 are in relation to the primary coil 10 or the secondary coil 20 so as to be partially close to a part of the adjacent coils. Are arranged side by side. Thereby, the leakage magnetic flux can be effectively used as the main magnetic flux. Moreover, since electromagnetic induction is performed in the plane direction (side-by-side direction) by the interlinkage magnetic flux, the power supply range in the plane direction can be expanded. Furthermore, the closer the adjacent coils are, the larger the proportion of the leakage magnetic flux that is linked can be increased. As a result, the amount of power that can be supplied also increases.

Here, when a plurality of relay devices 3 are arranged side by side as in the example of FIG. 7, the operating frequency of the high-frequency inverter 11 is set in consideration of the attenuation of magnetic flux in each expansion coil 30 as described above. It is preferable to configure a resonant circuit that resonates. Therefore, a capacitor may be used as the impedance element 31.

Thus, according to the first embodiment, the shape and size of the primary coil 10 are the same as those in the conventional example, but relaying is performed even if the power receiving device 2 is disposed away from the primary coil 10. Electric power can be supplied via the expansion coil 30 of the device 3. Therefore, restrictions on the location of the power receiving device 2 are reduced, and an easy-to-use power supply system can be provided. Further, by preparing a plurality of types of relay devices 3 having different shapes and sizes of the expansion coil 30, it is possible to construct a power feeding system corresponding to various applications. Furthermore, since the relay device 3 only needs to be provided with a single extension coil 30, it is necessary to provide two coils corresponding to the power supply side coil and the power reception side coil as in the conventional example, There is no need to use a core to suppress Therefore, a small power supply system can be constructed while suppressing an increase in cost.

Further, when the power supply device 1 and the relay device 3 are arranged so that a part of the winding of the expansion coil 30 is close to a part of the primary coil 10, the magnetic flux of the primary coil 10 and the expansion coil The secondary coil 20 can also be arranged at a position where both of the magnetic fluxes of the coil 30 are linked. As a result, the induced current generated in the secondary coil 20 increases, and as a result, the power supply efficiency to the power receiving device 2 can be increased. Furthermore, the air-core coil has a large power resistance and a small inductance. Therefore, an optimum system can be constructed by using an air-core coil in a system using a high frequency such as the power feeding system. Further, when light emitting diodes are used as the loads 21 and 32, since the light emitting diodes consume less power, it is possible to realize a lighting device with high brightness while suppressing running costs.

In the first embodiment, the case where the primary coil 10, the secondary coil 20, and the expansion coil 30 are cylindrical coils has been described as an example. However, the shape of each coil is not limited to the first embodiment. For example, it may be a rectangular tube. Further, the number of relay devices 3 is not limited to that in the first embodiment, and may be set as needed. Furthermore, each of the above forms is an example, and any other form may be used as long as it uses a leakage magnetic flux.

(Embodiment 2)
Embodiment 2 of the electric power feeding system which concerns on this invention is demonstrated based on FIG. The power supply system of the second embodiment is different from the first embodiment in that a plurality of relay devices 3 are arranged so as to surround the power supply device 1. The basic configuration is the same as that of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. Moreover, in FIG.8 (b), in order to simplify illustration, illustration of the power receiving apparatus 2 is abbreviate | omitted.

As shown in FIG. 8A, the power feeding system according to the second embodiment is similar to the power feeding device 1 including the cylindrical primary coil 10 and the power receiving device 2 including the cylindrical secondary coil 20. A plurality of (for example, six) relay devices 3 each having a cylindrical expansion coil 30 are provided. The six relay devices 3 are arranged so as to surround the power feeding device 1 in a state in which a part of the winding of the expansion coil 30 is brought close to a part of the primary coil 10. The power receiving device 2 is arranged in a state where a part of the winding of the secondary coil 20 is brought close to a part of the expansion coil 30 of the relay device 3. FIG. 8B shows an example in which each relay device 3 is provided with a load (for example, a heat source, a light emitting diode, a buzzer, etc.) 32. In the second embodiment, the power feeding device 1, the power receiving device 2, and the relay device 3 are configured as separate devices in a form that is housed in a case (not shown).

Thus, according to the second embodiment, by disposing the plurality of expansion coils 30 so as to surround the primary coil 10, the distance between the primary coil 10 and each expansion coil 30 becomes substantially equal. Therefore, since the magnetic flux generated in each expansion coil 30 is a uniform and stable magnetic flux, the power receiving device 2 can receive the same level of power from any relay device 3.

Note that the number of relay devices 3 is not limited to that of the second embodiment, and may be set as appropriate according to the application. Also in the second embodiment, each coil is not limited to a cylindrical coil, and may be a rectangular tube.

(Embodiment 3)
Embodiment 3 of the electric power feeding system which concerns on this invention is demonstrated based on FIG. In the first and second embodiments, the primary coil 10 and the extension coil 30 are used as cylindrical spiral coils. However, in the third embodiment, a rectangular cylindrical spiral coil is used as the primary coil 10 and the extension coil 30. ing. The basic configuration is the same as that of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. Moreover, in FIG. 9, illustration of the power receiving apparatus 2 is abbreviate | omitted in order to simplify illustration.

As shown in FIG. 9A, the power feeding system according to the third embodiment includes a power feeding device 1 including a primary coil 10 made of a rectangular cylindrical spiral coil, a power receiving device (not shown), and a rectangular cylindrical shape. And a plurality of (for example, three) relay devices 3 each having an expansion coil 30 made of a spiral coil. In the third embodiment as well, the power supply device 1 and the relay device 3 are configured as separate devices in a form that is housed in a case (not shown).

In the example of FIG. 9A, the power supply device 1 and the three relay devices 3 are arranged so that the coil portions (winding portions) adjacent to each other are in parallel. That is, the power supply device 1 and the three relay devices 3 constitute one rectangular power supply unit. FIG. 9B shows another example of the third embodiment. The power supply device 1 and the three relay devices 3 are arranged side by side so that the coil portions adjacent to each other are parallel to each other. That is, in FIG. 9B, the power supply device 1 and the three relay devices 3 form one horizontally long power supply unit.

Thus, according to the third embodiment, the gap between the coils is reduced by arranging the power supply device 1 and the plurality of relay devices 3 so that the coil portions close to each other are parallel to each other. As a result, since the magnetic fluxes can be efficiently linked, more relay devices 3 can be arranged along the plane direction (side-by-side direction). Therefore, the feeding distance in the plane direction can be extended.

The shapes of the primary coil 10 and the expansion coil 30 are not limited to the embodiment shown in FIGS. 9A and 9B. For example, as shown in FIG. It may be a cube-shaped coil in which windings are arranged along. Further, since the winding portions adjacent to each other need only be in parallel, each coil shape may be a polygon other than a quadrangle (for example, a triangle) or a polyhedral shape such as a triangular pyramid or a quadrangular pyramid. In these coils as well, the gaps between the coils can be reduced, and as a result, the magnetic flux can be linked efficiently.

(Embodiment 4)
Embodiment 4 of the electric power feeding system which concerns on this invention is demonstrated based on FIG. In the first to third embodiments described above, the power feeding device 1 and the relay device 3 are individually configured as separate devices, but in the fourth embodiment, an integral power feeding means is provided between the power feeding device 1 and the relay device 3. It is composed. Furthermore, in Embodiment 4, a plurality of coils can be folded between the coils. The basic configuration is the same as that of the third embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. In FIG. 10, the illustration of the power receiving device is omitted to simplify the illustration.

The power feeding system according to the fourth embodiment includes a power feeding device 1 including a primary coil 10 formed of a rectangular cylindrical spiral coil, a power receiving device (not shown), and an expansion coil 30 formed of a rectangular cylindrical spiral coil. Are provided with a plurality of (for example, three) relay devices 3 and an attachment member 4 to which the power supply device 1 and the relay device 3 are attached.

The mounting member 4 is, for example, a flexible resin molded product, and is provided with a cross-shaped crease 4a that is divided into four equal parts. The attachment member 4 can be folded by the fold 4a.

The power supply device 1 and the three relay devices 3 are respectively attached to four areas that are divided into four equal parts by the fold line 4a to constitute an integral power supply means (feed means). In addition, each coil is arrange | positioned in each area in the state which is parallel and adjacent with respect to the coil adjacent to each, respectively.

When using the power supply means configured as described above, the attachment member 4 is expanded as shown in FIG. Further, as shown in FIG. 10B, the power supply means can be accommodated by folding the attachment member 4.

Thus, according to the fourth embodiment, the power supply range can be set large by expanding it during use, and the storage space can be reduced by folding it when not in use.
In the fourth embodiment, the fold 4a is provided on the attachment member 4 so that it can be folded, but it may be folded via a hinge, for example. Further, the mounting member 4 may be made of a foldable material (for example, cloth). In this case, there is an advantage that a fold or a hinge is not necessary.

(Embodiment 5)
Embodiment 5 of the power feeding system according to the present invention will be described with reference to FIGS. 11 and 12. In the first to fourth embodiments described above, the primary coil 10 and the expansion coil 30 are generally arranged in a plane, whereas in the fifth embodiment, the primary coil 10 and the expansion coil 30 are generally arranged three-dimensionally. is doing. The basic configuration is the same as that of the third embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

FIG. 11A shows a conventional power supply system, which includes a power supply device 1 including a primary coil 10 formed of a square cylindrical spiral coil, a secondary coil 20 formed of a cylindrical spiral coil, and an illumination 21. And a power receiving device 2. The power feeding device 1 and the power receiving device 2 are arranged such that the coil surface of the primary coil 10 and the coil surface of the secondary coil 20 face each other. In this configuration, the illumination 21 is turned on when the distance between the power feeding device 1 and the power receiving device 2 is D1.

On the other hand, FIG. 11B shows a power feeding system according to the fifth embodiment, which includes a power feeding device 1 and a power receiving device 2 similar to those in FIG. 11A, and an expansion coil 30 made up of a rectangular spiral coil. A plurality of (for example, two) relay devices 3 and 3 are provided. The two relay devices 3 and 3 are arranged between the power feeding device 1 and the power receiving device 2. The extension coil 30 of each relay device 3 is arranged such that its own coil surface and the coil surfaces of the primary coil 10 and the secondary coil 20 face each other. A capacitor is used as the impedance element 31 of each relay device 3, and a resonance circuit that resonates with the operating frequency of the high-frequency inverter 11 is configured by the capacitor and the expansion coil 30.

In the power supply system shown in FIG. 11B, the magnetic flux interlinking with the expansion coil 30 decreases when the distance between the power supply device 1 and the relay device 3 is greater than D1, but the induction flowing through the expansion coil 30 The current is increased by the resonant circuit. For this reason, the magnetic flux generated in the expansion coil 30 increases. As a result, the illumination 21 can be turned on by interlinking the magnetic flux generated in the expansion coil 30 with the secondary coil 20. That is, the distance D2 from the power feeding device 1 that can turn on the illumination 21 to the power receiving device 2 can be made longer than the distance D1 of the conventional example.

FIG. 12 shows an example of a display device using the power feeding system. Exhibits P are arranged on the upper, middle, and lower stages of the rectangular box-shaped case 5, respectively, and each exhibit P is irradiated with spot illumination from the lower side. A power supply device 1 including a primary coil 10 is disposed at the lower part of the lower display space, and a power reception device 2 including a secondary coil 20 and an illumination 21 is disposed above the power supply device 1. . In addition, relay devices 3 each having an extension coil 30 are arranged in the lower part of the upper and middle exhibition spaces, and power receiving devices each having a secondary coil 20 and an illumination 21 are provided above each relay device 3. 2 is arranged.

Next, the operation of the power supply system in FIG. 12 will be briefly described. When a high-frequency current is applied to the primary coil 10 by the high-frequency inverter 11 of the power supply device 1, a magnetic flux is generated so as to link the primary coil 10. In the lower power receiving device 2, an induced current flows through the secondary coil 20 by the magnetic flux interlinking the secondary coil 20. Due to this induced current, the illumination 21 of the lower power receiving device 2 is turned on.

Also, the magnetic flux generated in the primary coil 10 is linked to the expansion coil 30 of the intermediate relay device 3. As described above, the expansion coil 30 and the impedance element 31 constitute a resonance circuit. Therefore, for example, even when the distance from the primary coil 10 to the expansion coil 30 is long and the interlinkage magnetic flux is small, the magnetic flux generated in the expansion coil 30 is increased by the resonance circuit. As a result, an induced current flows through the secondary coil 20 by interlinking this magnetic flux with the corresponding secondary coil 20. Due to this induced current, the illumination 21 of the middle power receiving device 2 is turned on.

Furthermore, the magnetic flux generated in the expansion coil 30 of the intermediate relay device 3 is linked to the expansion coil 30 of the upper relay device 3. Then, the illumination 21 of the upper power receiving device 2 is turned on through the same processing as described above.

Thus, according to the fifth embodiment, the relay devices 3 and 3 are disposed between the power feeding device 1 and the power receiving device 2 with the coil surfaces of the coils 10, 20, and 30 facing each other. ing. In addition, a capacitor is used as the impedance element 31 of each relay device 3, and a resonance circuit is configured in combination with the expansion coil 30. Therefore, even if the distance between the power supply device 1 and the power receiving device 2 is farther than the conventional example, power can be supplied to the power receiving device 2, and therefore a power supply system that enables power supply at a position further away from the power supply device 1. Can be realized.

In addition, the coil shape of each coil is not limited to Embodiment 5, Other shapes may be sufficient similarly to said other embodiment.
(Embodiment 6)
Embodiment 6 of the electric power feeding system which concerns on this invention is demonstrated based on FIG. In the fifth embodiment, the relay device 3 is disposed between the power feeding device 1 and the power receiving device 2 so that the coil surfaces of the respective coils face each other. 3 is arranged. The basic configuration is the same as that of the third embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

FIG. 13A shows a display device using a conventional power supply system. In the lower part of the case 5, a power supply device 1 including a primary coil 10 made of a rectangular tube-shaped spiral coil is disposed. From the upper part of the case 5, a power receiving device 2 including a secondary coil 20 made of a cylindrical spiral coil is suspended. In FIG. 13A, the illumination 21 is turned on when the distance between the power supply device 1 and the power receiving device 2 is H1.

On the other hand, FIG. 13B is a display device using the power supply system of the sixth embodiment. The power supply device 1 and the power receiving device 2 are the same as those in FIG. 13A, and the expansion coil is composed of a rectangular spiral coil. A plurality of (for example, two) relay devices 3 and 3 each having 30 are provided. A power feeding device 1 is arranged at the lower part of the case 5. In the upper part of the case 5, two relay devices 3 and 3 are arranged close to each other with their coil surfaces facing each other. Furthermore, the power receiving device 2 is suspended from the upper part of the case 5. Here, also in the sixth embodiment, a capacitor is used as the impedance element 31, and this capacitor and the expansion coil 30 constitute a resonance circuit that resonates with the operating frequency of the high-frequency inverter 11.

Therefore, in the sixth embodiment, similarly to the fifth embodiment, even when the magnetic flux of the primary coil 10 linked to the expansion coil 30 is small, the induced current flowing through the expansion coil 30 is increased by the resonance circuit. For this reason, even if the distance from the power feeding device 1 to the power receiving device 2 is H2 (H2> H1), the magnetic flux necessary for lighting the illumination 21 is generated in the expansion coil 30. And since this magnetic flux is linked to the secondary coil 20, an induced current flows through the secondary coil 20, and the illumination 21 can be turned on.

Thus, according to the sixth embodiment, the relay devices 3 and 3 are placed on the opposite side of the power supply device 1 with respect to the power receiving device 2 with the coil surfaces of the coils 10, 20 and 30 facing each other. Is arranged. In addition, a capacitor is used as the impedance element 31 of each relay device 3, and a resonance circuit is configured in combination with the expansion coil 30. Therefore, even if the distance between the power supply device 1 and the power receiving device 2 is farther than the conventional example, power can be supplied to the power receiving device 2, and therefore a power supply system that enables power supply at a position further away from the power supply device 1. Can be realized.

In addition, the coil shape of each coil is not limited to Embodiment 6, Other shapes may be sufficient similarly to said other embodiment.
(Embodiment 7)
Embodiment 7 of the electric power feeding system which concerns on this invention is demonstrated based on FIG. The seventh embodiment is different from the above-described embodiments in that the extension coils 30 of the relay device 3 are disposed on both sides of the primary coil 10 of the power supply device 1. The basic configuration is the same as that of FIG. 7B of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

The power feeding system according to the seventh embodiment includes a power feeding device 1 including a primary coil 10, a plurality (for example, two) of power receiving devices 2 each including a secondary coil 20, and a plurality (for example) each including an expansion coil 30. For example, six relay devices 3 are provided. One relay device 3 is arranged on each side of the power supply device 1 such that the coil surface of the extension coil 30 faces the coil surface of the primary coil 10. Further, the remaining relay devices 3 are arranged such that their extension coils 30 are arranged side by side with respect to the extension coils 30 of the relay devices 3 arranged on both sides of the power supply device 1. Further, each power receiving device 2 is arranged such that the secondary coil 20 is arranged side by side with respect to the expansion coil 30 of each relay device 3 arranged at the end. In the seventh embodiment as well, the power feeding device 1, the power receiving device 2, and the relay device 3 are configured as separate devices so as to be housed in a case (not shown).

Here, FIG. 15 is a schematic diagram of the relay device 3 of the seventh embodiment. In the relay device 3, a circular extension coil 30 made of a planar coil and an impedance element 31 made of a chip element are arranged on the same plane. The expansion coil 30 may be formed into a sheet shape by printed wiring, or may be wrapped with a plastic film or the like wound with a thin copper wire. Thus, the thin relay device 3 can be realized by arranging the extension coil 30 made of a planar coil and the impedance element 31 made of a chip element on the same plane. Note that planar coils may be used as the primary coil 10 and the secondary coil 20, and in this case as well, the power feeding device 1 and the power receiving device 2 can be reduced in thickness.

In the seventh embodiment, as in the power supply system described with reference to FIG. 7, a plurality of relay devices 3 are arranged side by side. Therefore, in consideration of the attenuation of magnetic flux in each expansion coil 30, the high-frequency inverter 11. It is preferable to configure a resonance circuit that resonates at the operating frequency. In this case, it is preferable to use a capacitor for the impedance element 31.

Next, the operation of the power supply system of FIG. 14 will be briefly described. When the magnetic flux generated in the primary coil 10 of the power supply device 1 is linked to the expansion coils 30 and 30 on both sides, magnetic fluxes corresponding to the induced current are generated in the expansion coils 30 and 30 respectively. The leakage fluxes of these magnetic fluxes are linked to the adjacent expansion coils 30 and 30, and a magnetic flux corresponding to the induced current is generated in the adjacent expansion coils 30 and 30. In the same manner, the leakage magnetic flux is sequentially linked to the adjacent expansion coils 30 and 30. When the leakage magnetic fluxes of the two extension coils 30 and 30 at the ends are linked to the corresponding secondary coils 20 and 20, respectively, induced current flows through the secondary coils 20 and 20, and the corresponding loads 21 and 21 respectively. Is supplied with power.

Thus, according to the seventh embodiment, by using the magnetic flux on both sides of the primary coil 10 of the power supply device 1, the power supply range to the power reception device 2 can be further expanded. The degree of freedom of arrangement is further increased.

Note that the number of relay devices 3 to be used is not limited to that in the seventh embodiment, and may be set as appropriate according to the application. Moreover, the coil shape of each coil is not limited to Embodiment 7, Other shapes may be sufficient like the said other embodiment. Further, also in the first to sixth embodiments, the relay device 3 shown in FIG. 15 may be used.

(Embodiment 8)
Embodiment 8 of the electric power feeding system which concerns on this invention is demonstrated based on FIG. In Embodiments 1 to 7 described above, a commercial power source is used as the power source of the high-frequency inverter 11, but in Embodiment 8, the battery 6 is used. The basic configuration is the same as that of FIG. 7A of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

The power feeding system according to the eighth embodiment includes a power feeding device 1 including a primary coil 10 formed of a cylindrical spiral coil, a power receiving device 2 including a secondary coil 20 formed of a cylindrical spiral coil, and a cylindrical shape. And a plurality of (for example, three) relay devices 3 each having an extension coil 30 made of a spiral coil. The power feeding device 1 and the three relay devices 3 are arranged side by side so that the primary coil 10 and each of the expansion coils 30 are close to the coils adjacent to each other. Furthermore, the power receiving device 2 is arranged so that the coil surface of the secondary coil 20 faces the coil surface of the expansion coil 30 of the terminal relay device 3. The high-frequency inverter 11 of the power supply device 1 is supplied with power from the battery 6. The battery 6 may be a primary battery or a secondary battery, or an electric double layer capacitor or a solar battery. Also in the eighth embodiment, the power feeding device 1, the power receiving device 2, and the relay device 3 are configured as separate devices so as to be housed in a case (not shown).

Further, in the eighth embodiment, since the plurality of relay devices 3 are arranged side by side as in the power supply system described in FIG. 7, the high frequency inverter 11 is considered in consideration of the attenuation of magnetic flux in each expansion coil 30. It is preferable to configure a resonance circuit that resonates at the operating frequency. In this case, it is preferable to use a capacitor for the impedance element 31.

Next, the operation of the power supply system of FIG. 16 will be briefly described. When the leakage flux of the magnetic flux generated in the primary coil 10 of the power supply device 1 is linked to the adjacent expansion coil 30, a magnetic flux corresponding to the induced current is generated in the expansion coil 30. Further, when the leakage flux of the magnetic flux is linked to the adjacent expansion coil 30, a magnetic flux corresponding to the induced current is also generated in the adjacent expansion coil 30. In the same manner, the leakage magnetic flux sequentially links to the adjacent expansion coils 30. When the magnetic flux of the terminal expansion coil 30 is linked to the secondary coil 20, an induced current flows through the secondary coil 20, and power is supplied to the load 21.

Thus, according to the eighth embodiment, a power supply of the power supply device 1 is supplied from the battery 6 to realize a cordless power supply system. As a result, the power supply system can be used in a mobile system or in different places.

Note that the number of relay devices 3 to be used is not limited to that in the eighth embodiment, and may be set as appropriate according to the application. Moreover, the coil shape of each coil is not limited to Embodiment 8, Other shapes may be sufficient like the said other embodiment. Further, in the eighth embodiment, the relay device 3 shown in FIG. 15 may be used.

(Embodiment 9)
Embodiment 9 of the power feeding system according to the present invention will be described with reference to FIG. The ninth embodiment is different from the above-described embodiments in that each relay device 3 is arranged so as to be close to at least one power supply device 1. The basic configuration is the same as that of the third embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

The power supply system according to the ninth embodiment includes a plurality of (for example, two) power supply devices 1 each including a primary coil 10 formed of a rectangular tube-shaped spiral coil and a secondary coil 20 formed of a rectangular tube-shaped helical coil. The power receiving device 2 includes a plurality of (for example, 13) relay devices 3 each including an expansion coil 30 that is similarly formed of a square cylindrical spiral coil. In the ninth embodiment, the power feeding device 1, the power receiving device 2, and the relay device 3 are each configured as a separate device in a form that is housed in a case (not shown).

In the example of FIG. 17, each power supply device 1 is surrounded by eight relay devices 3. The two power supply devices 1 and the 13 relay devices 3 constitute a single rectangular power supply unit by connecting adjacent devices with attachment means (not shown). In this configuration, each relay device 3 is arranged so as to be close to at least one power supply device 1, and further, three relay devices 3 arranged in the center are so close to two power supply devices 1, 1. Is arranged.

The power receiving device 2 is arranged so that the coil surface of the secondary coil 20 faces the coil surface of the primary coil 10 and / or the coil surface of the expansion coil 30. For this reason, when power is supplied to the power receiving device 2, the magnetic flux of the primary coil 10 and / or the magnetic flux of the expansion coil 30 links the secondary coil 20. When an induction current flows through the secondary coil 20 due to the interlinkage magnetic flux, electric power is supplied to the load 21. Therefore, according to the ninth embodiment, the power receiving device 2 can be arbitrarily arranged at a position where the magnetic flux of the primary coil 10 or the expansion coil 30 is linked.

Thus, according to the ninth embodiment, each relay device 3 is arranged so as to be close to at least one power supply device 1. Therefore, the attenuation of the magnetic flux linked to each expansion coil 30 can be suppressed, and as a result, the power receiving device 2 can receive power from any relay device 3.

Note that the number of power supply devices 1 and relay devices 3 to be used is not limited to that of the ninth embodiment, and may be set as appropriate according to the application. Moreover, the coil shape of each coil is not limited to Embodiment 9, Other shapes may be sufficient like the said other embodiment. Further, also in the ninth embodiment, the relay device 3 shown in FIG. 15 may be used.

(Embodiment 10)
Embodiment 10 of the power feeding system according to the present invention will be described with reference to FIG. The tenth embodiment is different from the above embodiments in that the power supply device 1 and the relay device 3 are each formed as a puzzle piece having a predetermined shape (for example, a different shape). Since the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted. In FIG. 18, the illustration of the power receiving device is omitted to simplify the illustration.

The power supply system of the tenth embodiment includes a power supply device 1 including a primary coil 10, a power receiving device (not shown), and a plurality (for example, four) of relay devices 3 each including an expansion coil 30. ing. The power supply device 1 and the four relay devices 3 are formed as puzzle pieces formed in different shapes. A coil is wired along each side edge of each puzzle piece. And in the state which assembled the puzzle piece, each adjacent coil is arrange | positioned in the state which adjoined mutually, and one rectangular-shaped electric power feeding part is comprised as a whole. In addition, the power supply device 1 and each relay device 3 are provided with light emitting diodes 12 and 32 that are turned on by a current flowing through the coil.

Next, the operation of the power supply system in FIG. 18 will be briefly described. When a high frequency current is applied to the primary coil 10 by the high frequency inverter 11, a magnetic flux is generated so as to link the primary coil 10, and the light emitting diode 12 is turned on by the high frequency current flowing through the primary coil 10. In addition, when the magnetic flux generated in the primary coil 10 is linked to the expansion coils 30 of the adjacent relay devices 3, an induced current flows through each expansion coil 30 and a magnetic flux corresponding to the induced current is generated. In each relay device 3, the corresponding light emitting diode 32 is turned on by the induced current flowing through the expansion coil 30. The relay device 3 that is not adjacent to the power supply device 1 is linked to the leakage magnetic flux of the adjacent relay device 3, and as a result, an induced current flows through the expansion coil 30, so that the corresponding light emitting diode 32 is turned on. .

Here, since the relay devices 3 are also arranged side by side in the tenth embodiment, a resonance circuit that resonates with the operating frequency of the high-frequency inverter 11 is configured in consideration of the attenuation of magnetic flux in each expansion coil 30. It is preferable to do this. In this case, it is preferable to use a capacitor for the impedance element 31.

Thus, according to the tenth embodiment, the power supply device 1 and the relay device 3 are puzzle pieces having different shapes, respectively, and can be constructed while enjoying this system. Further, when a light emitting diode is provided in each device as in the tenth embodiment, it is possible to improve the design.

Note that the number of power supply devices 1 and relay devices 3 to be used is not limited to that of the tenth embodiment, and may be set as appropriate according to the application. Also in the tenth embodiment, the relay device 3 shown in FIG. 15 may be used.

Claims (19)

1. A non-contact transmission system,
   A sending-side device that includes a primary coil and sends electric power or an electric signal corresponding to magnetic flux generated by flowing high-frequency current through the primary coil;
   A receiving device comprising a secondary coil and receiving the power or electric signal by the secondary coil;
   One or more relay devices each having a closed circuit composed of a single extension coil and an impedance element;
   The secondary coil is electromagnetically coupled to the primary coil via at least one expansion coil of the one or more relay devices;
   The transmission system is characterized in that the one or more relay devices are arranged to extend a distance between the sending device and the receiving device in at least one of a vertical direction and a horizontal direction.
2. The one or more relay devices are configured by a plurality of relay devices, and the plurality of relay devices are interposed between the sending device and the receiving device. The described transmission system.
3. The transmission system according to claim 1, wherein the extension coil is arranged so as to be partially close to a part of the primary coil.
4. The transmission system according to claim 1, wherein the position of the one or more relay devices can be changed with respect to the sending device according to the position of the receiving device.
5. The feeding side device and the one or more relay devices constitute an integral feeding means by arranging the primary coil and the extension coil close to each other, and the feeding means is adjacent to the feeding device. The transmission system according to claim 1, wherein the transmission system is foldable between coils.
6. The one or more relay devices are constituted by a plurality of relay devices, and the extension coil of the plurality of relay devices is in a state of being partially close to a part of the primary coil. The transmission system according to claim 1, wherein the transmission system is arranged so as to enclose the frame.
7. The transmission system according to claim 1, wherein the extension coil and the primary coil are arranged close to each other and have a coil shape such that the adjacent coil portions are parallel to each other.
8. The transmission system according to claim 7, wherein the coil shape is a polygon or a polyhedron.
9. The one or more relay devices are configured by a plurality of relay devices, and the plurality of relay devices are configured such that the coil surface of the extension coil of the plurality of relay devices is the coil surface of the primary coil and the secondary coil. 2. The transmission system according to claim 1, wherein the transmission system is disposed between the sending device and the receiving device so as to face the coil surface.
10. The one or more relay devices are constituted by a plurality of relay devices, and the plurality of relay devices are such that the coil surfaces of the extension coils of the plurality of relay devices face each other, and the coil of the primary coil The transmission system according to claim 1, wherein the transmission system is disposed on the opposite side of the sending device with respect to the receiving device such that a surface of the coil is opposite to a coil surface of the secondary coil.
11. The one or more relay devices are constituted by a plurality of relay devices including first and second relay devices, and the first and second relay devices are the extension coils of the first relay device. The feeding side so that the coil surface faces the first coil surface of the primary coil and the coil surface of the expansion coil of the second relay device faces the second coil surface of the primary coil. The transmission system according to claim 1, wherein the transmission system is disposed on both sides of the device.
12. The sending device is one of a plurality of sending devices provided in the transmission system, and the one or more relay devices are constituted by a plurality of relay devices, each of the plurality of relay devices. The transmission system according to claim 1, wherein the transmission system is arranged so as to be close to at least one of the plurality of sending devices.
13. The transmission system according to claim 1, wherein the impedance element is a capacitor that forms a resonance circuit together with the expansion coil.
14. The transmission according to claim 1, wherein at least one of the one or more relay devices includes a load that is operated by electric power or an electric signal corresponding to magnetic flux generated in a primary coil of the sending device. system.
15. The transmission system according to claim 1, wherein the expansion coil is an air-core coil.
16. The transmission system according to claim 1, wherein the extension coil made of a planar coil and the impedance element made of a chip element are arranged on the same plane.
17. The said receiving side apparatus is equipped with a light emitting diode as a load, The said sending side apparatus supplies electric power to the said receiving side apparatus via the said 1 or several relay apparatus, The Claim 1 characterized by the above-mentioned. Transmission system.
18. The transmission system according to claim 1, wherein the sending device is operable by a battery.
19. The transmission system according to claim 1, wherein the sending device and the one or more relay devices are configured as puzzle pieces having different shapes.

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