Wireless power supply system

Abstract

The movable partition members improve the usability of the power supply area within the partitioned space. [Solution] The wireless power supply system 100 comprises a power supply device 10 having power supply electrodes 12, 13 arranged on the floor or ceiling surface of the building 1, and a power receiving device 20 that receives power from the power supply device 10 through power receiving electrodes 22, 23 arranged opposite to the power supply electrodes 12, 13. The power receiving device 20 is installed on a partition 30 that is movable within the building 1 and can partition spaces within the building 1, and the power receiving electrodes 22, 23 are arranged on the lower or upper surface of the partition 30.

Description

Technical Field

[0001] The present invention relates to a wireless power supply system.

Background Art

[0002] Patent Document 1 discloses a wireless power supply system including a power supply device provided in a building and a power receiving device that receives power from the power supply device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, in a space partitioned by a movable partition wall that can move within a building, there are often no fixed walls provided with power supply facilities such as outlets. To secure power, for example, it is conceivable to arrange outlets on the floor using a wireless power supply system as described in Patent Document 1. However, even in such a case, every time the movable partition wall is moved and the shape of the space is changed, it is necessary to move the outlets arranged on the floor and plug and unplug the power cords, so the usability around the power supply has not been sufficiently improved.

[0005] An object of the present invention is to improve the usability around the power supply in a space partitioned by a movable partition member.

Means for Solving the Problems

[0006] The present invention relates to a wireless power supply system comprising a power supply device having power supply electrodes arranged on the floor or ceiling surface of a building, and a power receiving device that receives power from the power supply device through power receiving electrodes arranged opposite to the power supply electrodes, wherein the power receiving device is provided on a movable partition member that is movable within the building and can partition spaces within the building, and the power receiving electrodes are arranged on the lower or upper surface of the movable partition member. [Effects of the Invention]

[0007] According to the present invention, it is possible to improve the usability of the power supply area within a space partitioned by a movable partition member. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing a vertical cross-section of a building equipped with a wireless power supply system according to an embodiment of the present invention. [Figure 2] This is a cross-sectional view showing the section along line AA in Figure 1. [Figure 3] This is a circuit diagram of a wireless power supply system according to an embodiment of the present invention. [Figure 4] This figure illustrates a first modified example of a wireless power supply system according to an embodiment of the present invention. [Figure 5] This figure illustrates a second modified example of a wireless power supply system according to an embodiment of the present invention. [Modes for carrying out the invention]

[0009] Hereinafter, a wireless power supply system 100 according to an embodiment of the present invention will be described with reference to Figures 1 to 3. Figure 1 is a schematic diagram showing a vertical cross-section of a building 1 equipped with the wireless power supply system 100, Figure 2 is a cross-sectional view showing a cross-section along line AA in Figure 1, and Figure 3 is a circuit diagram of the wireless power supply system 100.

[0010] The building 1 to which the wireless power supply system 100 is applied is, for example, a reinforced concrete building and comprises a floor base material 2 and a floor finishing material 40 installed on the upper surface of the floor base material 2. The building 1 may also be made of wood, steel frame, reinforced concrete, or steel-reinforced concrete.

[0011] The subfloor material 2 is, for example, a concrete slab or a wooden board, and the floor finishing material 40 is, for example, a sheet material such as carpet tiles, flooring material, or polyvinyl chloride floor tiles, which are bonded to the upper surface of the subfloor material 2 with an acrylic resin adhesive or the like to form the floor surface of the space inside the building 1. In addition, a member such as the insulating member 42 described later may be provided between the subfloor material 2 and the floor finishing material 40, or a floor panel for a raised access floor may be provided.

[0012] The wireless power supply system 100 comprises a power supply device 10 having power supply electrodes 12 and 13 and installed in the building 1, a power receiving device 20 that wirelessly receives power from the power supply device 10 through power receiving electrodes 22 and 23 positioned opposite the power supply electrodes 12 and 13, and a floor finishing material 40 installed between the power supply electrodes 12 and 13 and the power receiving electrodes 22 and 23.

[0013] The floor finishing material 40 is a tile carpet having a pile portion (not shown) that constitutes the fibers that protrude from the surface, and a backing portion (not shown) to which the pile portion is fixed, and is formed in a substantially square shape and laid out on the upper surface of the floor base material 2.

[0014] As shown in Figures 1 and 3, the power supply device 10 includes an AC voltage generation unit 11 that generates an AC voltage, and a first power supply electrode 12 and a second power supply electrode 13 that are electrically connected to the AC voltage generation unit 11. In Figure 1, the conductors connecting the AC voltage generation unit 11 and the first power supply electrode 12 and the second power supply electrode 13 are shown schematically.

[0015] The AC voltage generation unit 11 is connected to a commercial power supply 7 that outputs an AC voltage of 50Hz to 60Hz and generates an AC voltage with a frequency of several hundred kHz to several tens of MHz, preferably 6 to 7 MHz or 12 to 14 MHz. The commercial power supply 7 is, for example, a single-phase two-wire power supply that outputs an AC voltage of 100V. Note that the commercial power supply 7 is not shown in Figure 3.

[0016] Furthermore, the AC voltage generation unit 11 has a first terminal 11a and a second terminal 11b that output AC voltages with opposite phases to each other, and the first power supply electrode 12 and the second power supply electrode 13 are electrically connected to these terminals 11a and 11b, respectively. In other words, AC voltages with opposite phases to each other are applied to the first power supply electrode 12 and the second power supply electrode 13.

[0017] The first power supply electrode 12 and the second power supply electrode 13 are thin, strip-shaped members that extend parallel to each other along the floor base material 2, and are arranged in the direction in which the guide rail 34 (described later) extends. The power supply electrodes 12 and 13 are made of, for example, iron, stainless steel, copper, or aluminum. If a floor panel for a free-access floor is installed on the floor base material 2, the first power supply electrode 12 and the second power supply electrode 13 are provided along the upper surface of the floor panel.

[0018] The first power supply electrode 12 and the second power supply electrode 13 each have a predetermined width, and are arranged with a predetermined gap between them. The widths of the first power supply electrode 12 and the second power supply electrode 13 are approximately the same, and the gap between the first power supply electrode 12 and the second power supply electrode 13 is larger than the widths of the first and second power supply electrodes 12 and 13, preferably set to about 1.3 to 2 times their width.

[0019] Moreover, an insulating member 42 is provided between the first power supply electrode 12 and the floor base material 2, and between the second power supply electrode 13 and the floor base material 2. The first power supply electrode 12, the second power supply electrode 13, and the floor base material 2 are electrically insulated from each other. By providing the insulating member 42 in this way, the flow of current from the first power supply electrode 12 and the second power supply electrode 13 to the floor base material 2 is prevented. As a result, the power transmission efficiency from the power supply device 10 to the power receiving device 20 can be increased.

[0020] As shown in FIG. 1, the power receiving device 20 is incorporated in a partition 30, which is a movable partition member that can move within the building 1 and partition the space within the building 1. The power receiving device 20 includes a case 21 installed in the main body 31 of the partition 30, which houses a rectifier 24 and the like to be described later, and a first power receiving electrode 22 and a second power receiving electrode 23 provided on the lower surface 31a of the main body 31 of the partition 30.

[0021] Hereinafter, as shown in FIGS. 1 and 2, a case where the partition 30 is a slide-type movable partition that has a flat main body 31 and a roller part 32 provided on the upper surface 31b of the main body 31 and is suspended via the roller part 32 on a guide rail 34 provided on the ceiling 3 will be described. Note that the partition 30 is not limited to the suspended type, and may be of any form as long as it can move within the building 1 and partition the space within the building 1. For example, it may have a roller part that contacts a guide rail provided on the floor surface and move along two guide rails, one provided on the floor surface and the other provided on the ceiling surface.

[0022] The main body 31 of the partition 30 is a known sound-absorbing panel formed by fitting, pasting, or filling a sound-insulating member such as a felt material or resin fiber into a frame made of aluminum, steel, or resin. It has a height ranging from the upper surface of the floor finishing material 40 to the lower surface (ceiling surface) of the ceiling 3 and has a width of a predetermined size (for example, 800 to 1200 mm) along the direction in which the guide rail 34 extends.

[0023] Furthermore, as shown in Figure 1, the thickness of the main body 31 is sufficient to allow the first power receiving electrode 22 and the second power receiving electrode 23 to be installed at a predetermined distance apart.

[0024] The roller section 32 is a known roller mechanism used in suspended-type movable partitions, and for example, it includes a first roller (not shown) that transmits the load of the main body section 31 to the guide rail 34 by rotating about a horizontal axis, and a second roller (not shown) that restricts the movement of the main body section 31 in the horizontal direction by rotating about a vertical axis.

[0025] The guide rail 34 is a metal rail member having a groove into which the roller portion 32 is rotatably inserted, and is installed in a pre-designed position relative to the ceiling 3, which is composed of a system ceiling or the like, for example, in a position that corresponds to how the space within the building 1 can be partitioned by the partition 30.

[0026] The partition 30 with the above configuration is suspended and supported by a guide rail 34 via a roller portion 32 such that a gap of a predetermined size is formed between the surface of the floor finishing material 40, which forms the floor surface, and the lower surface 31a of the main body portion 31. The lower surface 31a of the main body portion 31 may be in contact with the surface of the floor finishing material 40 to the extent that it rubs against it when the partition 30 is suspended.

[0027] The case 21 installed on the main body 31 of the partition 30 has an outlet 26 into which a plug 9 of an electrical device (not shown) is inserted, exposed on both sides of the main body 31 as shown in Figure 1. When the plug 9 is inserted into the outlet 26 of the power receiving device 20, power is supplied from the power supply device 10 to the electrical device through the power receiving device 20.

[0028] The first power receiving electrode 22 and the second power receiving electrode 23 are plate-shaped members arranged parallel to each other along the longitudinal direction (width direction) of the partition 30 on the lower surface 31a of the main body 31 of the partition 30 facing the surface of the floor finishing material 40 which forms the floor surface. Like the first power supply electrode 12 and the second power supply electrode 13, they are made of, for example, iron, stainless steel, copper, or aluminum. If the main body 31 is made of a conductive material, the first power receiving electrode 22 and the second power receiving electrode 23 are attached to the lower surface 31a of the main body 31 via an insulating member (not shown).

[0029] The first power receiving electrode 22 and the second power receiving electrode 23 each have a width similar to that of the first power supply electrode 12 and the second power supply electrode 13, and the distance between the first power receiving electrode 22 and the second power receiving electrode 23 is set to be similar to the distance between the first power supply electrode 12 and the second power supply electrode 13.

[0030] As described above, the first power supply electrode 12 and the second power supply electrode 13 are arranged along the extending direction of the guide rail 34. Therefore, the first power receiving electrode 22 and the second power receiving electrode 23, which are provided on the lower surface 31a of the partition 30 that moves along the guide rail 34, will naturally be facing the first power supply electrode 12 and the second power supply electrode 13. In other words, it is possible to position the first power receiving electrode 22 and the second power receiving electrode 23 facing the first power supply electrode 12 and the second power supply electrode 13 without performing any special alignment work.

[0031] Although Figure 1 shows a configuration in which the first power receiving electrode 22 is positioned above the first power supply electrode 12 with the floor finishing material 40 in between, and the second power receiving electrode 23 is positioned above the second power supply electrode 13 with the floor finishing material 40 in between, the configuration may also be such that the second power receiving electrode 23 is positioned above the first power supply electrode 12 with the floor finishing material 40 in between, and the first power receiving electrode 22 is positioned above the second power supply electrode 13 with the floor finishing material 40 in between.

[0032] Furthermore, as shown in Figure 2, the lengths of the power receiving electrodes 22 and 23 provided along the longitudinal direction (width direction) of the partition 30 are set to be at least half, preferably at least two-thirds, and more preferably at least 90% of the length of the partition 30 in the longitudinal direction (width direction).

[0033] Here, even if the length of the receiving electrodes 22 and 23 is set to, for example, less than half the length of the partition 30 in the longitudinal direction, it is still possible to receive power with the power receiving device 20. However, the shorter the length of the receiving electrodes 22 and 23, the smaller the area of ​​the receiving electrodes 22 and 23 facing the supply electrodes 12 and 13 becomes, and the amount of power that can be received by the power receiving device 20 decreases. As a result, there is a risk that sufficient power cannot be supplied to electrical equipment with relatively high power consumption, such as display devices.

[0034] Therefore, in this embodiment, in order to increase the amount of power that can be received by the power receiving device 20, the receiving electrodes 22 and 23 provided on the partition 30 are made as long as possible, thereby increasing the area of ​​the receiving electrodes 22 and 23 facing the power supply electrodes 12 and 13.

[0035] With the first power supply electrode 12 and the first power receiving electrode 22 facing each other across the floor finishing material 40, and the second power supply electrode 13 and the second power receiving electrode 23 facing each other across the floor finishing material 40, a capacitor is formed by the first power supply electrode 12, the floor finishing material 40 and the first power receiving electrode 22, and a capacitor is formed by the second power supply electrode 13, the floor finishing material 40 and the second power receiving electrode 23. In other words, the floor finishing material 40 functions as a dielectric (insulator). As a result, as will be described later, the AC voltage applied to the first power supply electrode 12 excites a voltage in the first power receiving electrode 22, and the AC voltage applied to the second power supply electrode 13 excites a voltage in the second power receiving electrode 23.

[0036] Furthermore, the voltages excited at the first power receiving electrode 22 and the second power receiving electrode 23 are the same AC voltages as those applied to the first power supply electrode 12 and the second power supply electrode 13. Since their frequency is the same as the frequency of the AC voltage generated by the AC voltage generation unit 11, i.e., several hundred kHz to several tens of MHz, if the electrical equipment (not shown) connected to the power receiving device 20 is compatible with the commercial power supply 7, the voltages excited at the first power receiving electrode 22 and the second power receiving electrode 23 cannot be used as is.

[0037] Therefore, as shown in Figure 3, the power receiving device 20 further includes a rectifier 24 that converts the voltages excited by the first power receiving electrode 22 and the second power receiving electrode 23 into a DC voltage, and a DC / AC converter 25 that converts the DC voltage output from the rectifier 24 into an AC voltage equivalent to the commercial power supply 7 (for example, an AC voltage of 50Hz to 60Hz).

[0038] The rectifier 24 is provided to connect the first power receiving electrode 22 and the second power receiving electrode 23, and the DC / AC converter 25 is provided between the power outlet 26 and the rectifier 24.

[0039] Furthermore, the power receiving device 20 is equipped with an alarm 27 that notifies when voltage is excited at the first power receiving electrode 22 and the second power receiving electrode 23, and a storage battery 28 that stores the voltage excited at the first power receiving electrode 22 and the second power receiving electrode 23.

[0040] The alarm 27 is, for example, a lamp that lights up due to the DC voltage output from the rectifier 24. This allows the user of the wireless power supply system 100 to easily determine whether the first power receiving electrode 22 and the second power receiving electrode 23 are facing the first power supply electrode 12 and the second power supply electrode 13, and whether power is being supplied normally, by checking that the alarm 27 is lit.

[0041] Furthermore, by providing the storage battery 28, when the excitation of voltage at the first power receiving electrode 22 and the second power receiving electrode 23 stops, it becomes possible to supply power from the storage battery 28. This prevents momentary power interruptions caused by the power receiving electrodes 22 and 23 not facing the power supply electrodes 12 and 13, thereby improving the stability of power supply.

[0042] These rectifier 24, DC / AC converter 25, and storage battery 28 are housed inside the case 21 or inside the main body 31 of the partition 30.

[0043] Furthermore, the power receiving device 20 is equipped with an outlet 26, which is a terminal for supplying power to electrical equipment installed around the partition 30, and a power supply unit 29 that can directly supply power to electrical equipment such as a display device 36 attached to the partition 30. The outlet 26 also functions as a power supply unit that can supply power to electrical equipment attached to the partition 30 when the plugs of the electrical equipment attached to the partition 30 are inserted into it.

[0044] The power supply unit 29 is a conductor that directly connects electrical equipment such as the display device 36 to the DC / AC converter 25, and is routed within the main body 31 of the partition 30. Note that the electrical equipment to which power is directly supplied via the power supply unit 29 is not limited to the display device 36; it can be any electrical equipment that can be attached to the partition 30, such as a digital whiteboard (electronic blackboard). Furthermore, the power supply unit 29 is not limited to being routed within the main body 31; it may also be routed from around the outlet 26 along the surface of the main body 31 of the partition 30.

[0045] Furthermore, the power receiving device 20 may have only a power supply unit 29 that directly supplies power to electrical equipment such as a display device 36 attached to the partition 30, without having an outlet 26. By configuring the device to supply power only to electrical equipment attached to the partition 30 in this way, electrical wiring and outlets 26 are not exposed to the outside, thus improving the aesthetic appearance of the partition 30.

[0046] Next, the excitation of voltage at the first power receiving electrode 22 and the second power receiving electrode 23 will be explained with reference to the circuit diagram shown in Figure 3.

[0047] When a positive voltage is applied to the first power supply electrode 12 by the AC voltage generation unit 11, a positive charge is injected into the first power supply electrode 12. At this time, a negative charge is collected on the first power receiving electrode 22 due to electrostatic induction. On the other hand, a voltage with the opposite phase to that of the first power supply electrode 12, i.e., a negative voltage, is applied to the second power supply electrode 13, so a negative charge is injected into the second power supply electrode 13, and a positive charge is collected on the second power receiving electrode 23 due to electrostatic induction.

[0048] In this way, negative charges accumulate on the first receiving electrode 22 and positive charges accumulate on the second receiving electrode 23, so that, seemingly, a current flows from the first receiving electrode 22 to the second receiving electrode 23, that is, a positive voltage is excited on the first receiving electrode 22 and a negative voltage is excited on the second receiving electrode 23.

[0049] Although Figure 3 describes the case where the first power supply electrode 12 and the first power receiving electrode 22 face each other and the second power supply electrode 13 and the second power receiving electrode 23 face each other, a voltage is also excited at the first power receiving electrode 22 and the second power receiving electrode 23 when the first power supply electrode 12 and the second power receiving electrode 23 face each other and the second power supply electrode 13 and the first power receiving electrode 22 face each other.

[0050] In other words, in the wireless power supply system 100, power can be supplied if the first power receiving electrode 22 faces one of the power supply electrodes, the first power supply electrode 12 and the second power supply electrode 13, and the second power receiving electrode 23 faces the other power supply electrode, the first power supply electrode 12 and the second power supply electrode 13.

[0051] This type of wireless power transfer is performed by placing a pair of electrodes opposite each other and using the electric field between them, and is therefore also called the "electric field coupling method."

[0052] In the wireless power supply system 100, in order for the power receiving device 20 to receive power from the power supply device 10, it is necessary to position the pair of power receiving electrodes 22 and 23 provided on the power receiving device 20 along the pair of power supply electrodes 12 and 13 on the power supply device 10 side. As described above, the power supply electrodes 12 and 13 are positioned along the extending direction of the guide rail 34, and the power receiving electrodes 22 and 23 are positioned on the lower surface 31a of the partition 30 that moves along the guide rail 34. As a result, the power receiving electrodes 22 and 23 naturally end up facing the power supply electrodes 12 and 13.

[0053] Therefore, by simply moving the partition 30 along the guide rail 34, the power receiving device 20 can receive power from the power supply device 10, and power can be supplied to electrical equipment installed around the partition 30 or on the partition 30 itself via the partition 30.

[0054] According to the above embodiments, the following effects and advantages are achieved.

[0055] In the wireless power supply system 100 with the above configuration, the power receiving device 20, which receives power from the power supply device 10 through power receiving electrodes 22 and 23 arranged opposite to the power supply electrodes 12 and 13, is provided on a partition 30 (movable partition member) that is movable within the building 1 and can partition the space within the building 1, and the power receiving electrodes 22 and 23 are arranged on the lower surface 31a of the partition 30 so that they can face the power supply electrodes 12 and 13 which are arranged on the floor surface of the building 1.

[0056] In this way, by providing the power receiving device 20 on the partition 30 (movable partition member), it becomes possible to supply power via the partition 30 to electrical equipment installed in the space partitioned by the partition 30, as well as to electrical equipment installed on the partition 30 itself. This significantly improves the usability of the power supply within the space partitioned by the partition 30.

[0057] Furthermore, by making the length of the power receiving electrodes 22 and 23, which are provided along the longitudinal direction of the partition 30, more than half the length of the partition 30 in the longitudinal direction, and by increasing the area of ​​the power receiving electrodes 22 and 23 facing the power supply electrodes 12 and 13, the power that can be received by the power receiving device 20 provided on the partition 30 can be increased, thereby enabling power to be supplied even to electrical equipment with relatively high power consumption.

[0058] Furthermore, since the power supply electrodes 12 and 13 are arranged along the extending direction of the guide rail 34, and the power receiving electrodes 22 and 23 are positioned on the lower surface 31a of the partition 30 which moves along the guide rail 34, the power receiving electrodes 22 and 23 naturally face the power supply electrodes 12 and 13. Therefore, without any special alignment work, the power receiving device 20 can receive power from the power supply device 10 simply by moving the partition 30 along the guide rail 34.

[0059] Furthermore, the power supply electrodes 12 and 13 only need to be arranged along the extending direction of the guide rail 34, and do not need to be arranged across the entire floor in a grid pattern, for example. This reduces the cost required to install the wireless power supply system 100 and simplifies the installation process.

[0060] Furthermore, the following modifications are also within the scope of the present invention, and it is possible to combine the configurations shown in the modifications with the configurations described in the embodiments described above, or to combine the configurations described in the following different modifications.

[0061] In the above embodiment, since the power supply electrodes 12 and 13 of the power supply device 10 are located on the floor surface of the building 1, the power receiving electrodes 22 and 23 of the power receiving device 20 are located on the lower surface 31a of the partition 30 so as to be able to face them. Alternatively, the power supply electrodes 12 and 13 of the power supply device 10 may be located on the ceiling surface of the building 1, as shown in the first modified example in Figure 4. In this case, the power receiving electrodes 22 and 23 of the power receiving device 20 are located on the upper surface 131b of the partition 130 so as to be able to face them. Figure 4 is a cross-sectional view showing a cross-section corresponding to Figure 1, mainly showing the upper side of the partition 130 and the guide rail 134.

[0062] In the first modified example shown in Figure 4, the power receiving device 20 is provided on the partition 130 (movable partition member), and the power receiving electrodes 22 and 23 are positioned on the upper surface 131b of the partition 130 so as to face the power supply electrodes 12 and 13 located on the ceiling surface of the building 1. Therefore, similar to the above embodiment, it is possible to supply power via the partition 130 to electrical equipment installed in the space partitioned by the partition 130 or to electrical equipment installed on the partition 130 itself.

[0063] Furthermore, in the first modified example shown in Figure 4, the power receiving device 20 can receive power from the power supply device 10 simply by moving the partition 130 along the guide rail 134 via the roller section 132.

[0064] In the first modified example shown in Figure 4, the power supply electrodes 12 and 13 of the power supply device 10 are provided on the guide rail 134, but they may also be provided on the ceiling 3. In this case, the power receiving electrodes 22 and 23 of the power receiving device 20 are also provided so as to face them. Furthermore, between the power supply electrodes 12 and 13 of the power supply device 10 and the power receiving electrodes 22 and 23 of the power receiving device 20, a member 140 that functions as a dielectric (insulator), i.e., a member corresponding to the floor finishing material 40 in the above embodiment, is provided, as shown in Figure 4.

[0065] Furthermore, in the above embodiment, the partition 30 is configured to be movable along the guide rail 34. Alternatively, the partition 230 may be configured to be freely movable within the building 1 via casters 238, as shown in the second modified example in Figure 5. In this case, since the power receiving electrodes 22 and 23 provided on the partition 230 will not naturally be facing the power supply electrodes 12 and 13, it is preferable to make the surface color and material of the floor finishing material 40 different in the part covering the area where the power supply electrodes 12 and 13 are provided and the part covering the area where the power supply electrodes 12 and 13 are not provided, in order to clearly indicate the orientation in which the partition 230 should be placed, that is, the position where the power supply electrodes 12 and 13 are located.

[0066] Furthermore, in the second modified example shown in Figure 5, when moving the partition 230, there is a risk that the power receiving electrodes 22 and 23 located on the lower surface 231a of the main body 231 may be damaged by hitting a step or the like. Therefore, it is preferable to provide a mechanism that allows the main body 231 to be raised from the floor surface manually or automatically when moving the partition 230, and to be lowered towards the floor surface manually or automatically when installing the partition 230.

[0067] Furthermore, the height of the main body 231 of the partition 230 in the second modified example shown in Figure 5 may be set to a height that reaches the ceiling 3, or it may be set to any height of about 1300 to 1800 mm from the floor.

[0068] Furthermore, the movable partition member in the above embodiment is a partition 30 that is suspended from a guide rail 34 installed on the ceiling 3. The movable partition member is not limited to such a partition-specific type, but can take any form as long as it is movable within the building 1 and capable of dividing the space within the building 1. For example, it may be a rack that is movable and can also function as a partition, such as a display shelf having a certain height and width.

[0069] Furthermore, in the above embodiment, an AC voltage with opposite phase is applied to the first power supply electrode 12 and the second power supply electrode 13 to excite voltages in the first power receiving electrode 22 and the second power receiving electrode 23. However, an AC voltage may be applied to one of the power supply electrodes, the first power supply electrode 12 and the second power supply electrode 13, and the other power supply electrode, the first power supply electrode 12 and the second power supply electrode 13, may be treated as a neutral wire with a potential of 0 (zero). In this case as well, power can be supplied from the power supply device 10 to the power receiving device 20.

[0070] Furthermore, if the other of the first power supply electrode 12 and the second power supply electrode 13 is used as the neutral wire, it is sufficient that an electrical insulator is provided between one of the power supply electrodes and the building substrate, but it is not necessary to provide an electrical insulator between the other power supply electrode and the building substrate. In this case, the alarm 27 is configured to notify that a voltage has been excited at the first power receiving electrode 22, and the storage battery 28 is configured to store the voltage excited at the first power receiving electrode 22.

[0071] Furthermore, in addition to the method of making the other of the first and second power supply electrodes 12 and 13 a neutral wire, it is also possible to omit the insulating coating of the other power supply electrode and actively bring it to the same potential as the building structure or floor grounding to make it a neutral wire.

[0072] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of Symbols]

[0073] 100... Wireless power supply system 1. Building 3. Ceiling 10. Power supply device 12. First power supply electrode (power supply electrode) 13. Second power supply electrode (power supply electrode) 20. Power receiving device 22. First receiving electrode (receiving electrode) 23. Second receiving electrode (receiving electrode) 26... Outlet (Power supply section) 29...Power supply department 30, 130, 230... Partition (movable partition component) 31,131,231...Main body 31a,231a...bottom surface 31b,131b...Top surface 34,134... Guide rails 36. Display devices (electrical equipment) 40... Floor finishing materials

Claims

1. A power supply device having power supply electrodes positioned on the floor or ceiling surface of a building, The system includes a power receiving device that receives power from the power supply device through a power receiving electrode positioned opposite the power supply electrode, The power receiving device is mounted on a movable partition member that is movable within the building and capable of partitioning the space within the building. The power receiving electrode is positioned on the lower or upper surface of the movable partition member. Wireless power supply system.

2. The movable partition member is movable along a guide rail provided inside the building. The power supply electrode is arranged along the extending direction of the guide rail. The wireless power supply system according to claim 1.

3. The power receiving electrode is arranged along the longitudinal direction of the movable partition member, extending over more than half of the length of the movable partition member in the longitudinal direction. The wireless power supply system according to claim 1 or 2.

4. The power receiving device has a power supply unit capable of supplying power from the power supply device to electrical equipment attached to the movable partition member. The wireless power supply system according to claim 1 or 2.

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