Non-contact power supply system and non-contact power supply device

Abstract

To reduce a standby current flowing into a power transmission coil.SOLUTION: A non-contact power feeding system 10 includes a power conversion unit 120 that generates power to be transmitted to a power receiving coil 211, a power transmission unit group G1 that is configured by two or more power transmission units 110, each of the power transmission units having a power transmission circuit including a power transmission coil 111, a control section 130 that controls the supply of power from the power conversion unit to the power transmission unit group, and a position detection section 80 for detecting the position of a mobile body. The control section causes the power conversion unit to supply power to the power transmission unit group that satisfies the conditions for transmitting power, including that the distance of the power transmission coil relative to the power receiving coil of the mobile body is less than or equal to a pre-determined threshold value on the basis of location information indicating the position of the mobile body detected by the position detection section, and causes the power conversion unit not to supply power to the power transmission unit group that does not satisfy the conditions for transmitting power.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a contactless power supply system and a contactless power supply device. [Background technology]

[0002] Patent Document 1 describes a technology related to a contactless power supply device that supplies power from a power transmission coil to a power receiving coil mounted on a moving object. In the technology described in Patent Document 1, when the power transmission coil is not facing the power receiving coil, the input impedance of a power transmission resonant circuit having a power transmission coil is set to be small, and when the power transmission coil is facing the power receiving coil, the input impedance of the power transmission resonant circuit is set to be large. As a result, when the power transmission coil is not facing the power receiving coil, power is not supplied from the power transmission coil to the power supply coil. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-23094 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, when the power transmitting coil and the power receiving coil are not facing each other, the power supply from the power transmitting coil to the power receiving coil is suppressed, but the supply of current from the power transmitting circuit to the power transmitting coil is not completely stopped. In other words, in the technology described in Patent Document 1, even when the power transmitting coil is not facing the power receiving coil, there is a standby current that constantly flows into each power transmitting coil. Such a standby current increases as the number of power transmitting coils increases. [Means for solving the problem]

[0005] The present disclosure can be realized in the following forms.

[0006] The present disclosure No. 1 According to the embodiment, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a moving object (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes: The above A power conversion unit (120) that generates power for transmitting to a power receiving coil, and one or more power transmitting units, The above Each of the power transmission unit groups is composed of two or more power transmission units (110), The above Each of the power transmitting units has a power transmitting circuit including a power transmitting coil (111), The above Each power transmission unit is The above Receives power from the power conversion unit The above From the transmitting coil The above A power transmission unit group (G1) that transmits power to the receiving coil; The above From the power conversion unit The above A control unit (130) that controls the supply of power to the power transmission unit group; The above and at least one position detection unit (80) for detecting the position of the moving object. The above Detected by the position detector The above Mobile The above Based on location information indicating the location, The above Mobile The above For receiving coil The above Satisfying a power transmission condition, including the relative distance of the power transmission coil being equal to or less than a predetermined threshold. The above To the power transmission units The above Supplying power from the power conversion unit, The above Does not meet transmission requirements The above To the power transmission units The above Do not allow power to be supplied from the power conversion unit. The control unit controls the impedance of the power transmission circuit having the power transmission coil facing the receiving coil to be smaller than the impedance of the power transmission circuit having the power transmission coil not facing the receiving coil, thereby allowing power to be supplied to the receiving unit, and controls the impedance of the power transmission circuit having the power transmission coil not facing the receiving coil to be larger than the impedance of the power transmission circuit having the power transmission coil facing the receiving coil, thereby stopping the supply of power to the receiving unit. According to a second embodiment of the present disclosure, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a mobile body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of the power transmission units receiving power from the power conversion unit and transmitting power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the mobile body. The one or more power transmission unit groups are a plurality of the power transmission unit groups installed in a passage along which the moving body travels, and the power conversion unit is configured to supply or stop power to each of the power transmission unit groups. The control unit controls the power conversion unit to supply power to the power transmission unit groups that satisfy a power transmission condition including a relative distance of the power transmission coil to the power receiving coil of the moving body being equal to or less than a predetermined threshold based on position information indicating the position of the moving body detected by the position detection unit, and does not control the power conversion unit to supply power to the power transmission unit groups that do not satisfy the power transmission condition. The control unit detects or estimates a destination position of the moving body, identifies the power transmission unit groups installed at the destination, and controls the power conversion unit to cause a current to flow into the identified power transmission unit group before the moving body enters an area in which the identified power transmission unit group is installed. According to a third embodiment of the present disclosure, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a mobile body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of which receives power from the power conversion unit and transmits power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the mobile body. The control unit causes the power conversion unit to supply power to the power transmission unit group that satisfies a power transmission condition including a relative distance of the power transmission coil to the power receiving coil of the mobile body being equal to or less than a predetermined threshold based on position information indicating the position of the mobile body detected by the position detection unit, and does not cause the power conversion unit to supply power to the power transmission unit group that does not satisfy the power transmission condition. The control unit determines whether or not the battery of the mobile body needs to be charged based on information about a charging time when the battery provided in the mobile body was last charged and a distance traveled by the mobile body from the charging time. According to a fourth embodiment of the present disclosure, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a mobile body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of the power transmission units receiving power from the power conversion unit and transmitting power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the mobile body. The control unit causes the power conversion unit to supply power to the power transmission unit group that satisfies a power transmission condition including that the relative distance of the power transmission coil to the power receiving coil of the mobile body is equal to or less than a predetermined threshold based on position information indicating the position of the mobile body detected by the position detection unit, and does not cause the power conversion unit to supply power to the power transmission unit group that does not satisfy the power transmission condition. The power transmission condition includes (i) that the relative distance of the power transmission coil to the power receiving coil of the mobile body is equal to or less than the threshold, or (ii) that another power transmission unit group adjacent to the power transmission unit group that satisfies that the relative distance of the power transmission coil to the power receiving coil of the mobile body is equal to or less than the threshold. According to a fifth embodiment of the present disclosure, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a mobile body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of the power transmission units receiving power from the power conversion unit and transmitting power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the mobile body. The control unit controls the power conversion unit to supply power to the power transmission unit group that satisfies a power transmission condition including that a relative distance of the power transmission coil to the power receiving coil of the mobile body is equal to or less than a predetermined threshold based on position information indicating the position of the mobile body detected by the position detection unit, and does not control the power conversion unit to supply power to the power transmission unit group that does not satisfy the power transmission condition. The control unit transmits information indicating whether the mobile body is present in an area where the power transmission unit group to be controlled is installed to the control unit provided in another contactless power supply system. According to a sixth embodiment of the present disclosure, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a mobile body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of which receives power from the power conversion unit and transmits power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the mobile body. The control unit controls the power conversion unit to supply power to the power transmission unit group that satisfies a power transmission condition including that the relative distance of the power transmission coil to the power receiving coil of the mobile body is equal to or less than a predetermined threshold based on position information indicating the position of the mobile body detected by the position detection unit, and does not control the power conversion unit to supply power to the power transmission unit group that does not satisfy the power transmission condition. When the control unit detects that there is an apparatus that outputs a prohibition signal indicating that power transmission is prohibited within a predetermined range of the power transmission unit group, the control unit does not control the power conversion unit to supply power to the power transmission unit group. According to a seventh embodiment of the present disclosure, a non-contact power supply system is provided. The non-contact power supply system (10) supplies power to a mobile body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply system includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of the power transmission units receiving power from the power conversion unit and transmitting power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the mobile body. The control unit controls the power conversion unit to supply power to the power transmission unit groups that satisfy a power transmission condition including a relative distance of the power transmission coil to the power receiving coil of the mobile body being equal to or less than a predetermined threshold based on position information indicating the position of the mobile body detected by the position detection unit, and controls the power conversion unit not to supply power to the power transmission unit groups that do not satisfy the power transmission condition. The one or more power transmission unit groups are a plurality of the power transmission unit groups. The control unit monitors power supplied from the power conversion unit to the plurality of power transmission unit groups during a predetermined period, and controls the power conversion unit to limit the supply of power to some of the plurality of power transmission unit groups when a total sum of power during the predetermined period exceeds a predetermined reference value.

[0007] According to this aspect, the supply or stop of power from the power conversion unit is controlled depending on whether or not a power transmission condition is satisfied, including the relative distance of the power transmitting coil to the power receiving coil being equal to or less than a predetermined threshold value. Therefore, the standby current that constantly flows into the power transmitting coil can be reduced compared to an aspect in which the input impedance of the power transmitting resonant circuit is controlled.

[0008] The present disclosure Eighth According to the embodiment, a non-contact power supply device is provided. The non-contact power supply device supplies power to a moving object (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply device includes: The above A power conversion unit (120) that generates power for transmitting to a power receiving coil, and one or more power transmitting units, The above Each of the power transmission unit groups is composed of two or more power transmission units (110), The above Each of the power transmitting units has a power transmitting circuit including a power transmitting coil (111), The above Each power transmission unit is The above Receives power from the power conversion unit The above From the transmitting coil The above A power transmission unit group (G1) that transmits power to the receiving coil; The above From the power conversion unit The above A control unit (130) that controls the supply of power to the power transmission unit group; The above and at least one position detection unit (80) that detects the position of the moving body. The above The control unit The above Detected by the position detector The above Mobile The above Based on location information indicating the location, The above Mobile The above For receiving coil The above Satisfying a power transmission condition, including the relative distance of the power transmission coil being equal to or less than a predetermined threshold. The above To the power transmission units The above Supplying power from the power conversion unit, The above Does not meet transmission requirements The above To the power transmission units The above The control unit does not supply power from the power conversion unit. Power is supplied to the receiving unit by controlling the impedance of the power transmission circuit having the power transmission coil facing the receiving coil to be smaller than the impedance of the power transmission circuit having the power transmission coil not facing the receiving coil, and the supply of power to the receiving unit is stopped by controlling the impedance of the power transmission circuit having the power transmission coil not facing the receiving coil to be larger than the impedance of the power transmission circuit having the power transmission coil facing the receiving coil. According to a ninth embodiment of the present disclosure, there is provided a non-contact power supply device. The non-contact power supply device supplies power to a moving body (200) equipped with a power receiving unit (210) having a power receiving coil (211). The non-contact power supply device includes a power conversion unit (120) that generates power to be supplied to the power receiving coil, one or more power transmission unit groups (G1) each including two or more power transmission units (110) and each having a power transmission circuit including a power transmission coil (111), each of the power transmission units receiving power from the power conversion unit and transmitting power from the power transmission coil to the power receiving coil, a control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group, and at least one position detection unit (80) that detects the position of the moving body. The one or more power transmission unit groups are a plurality of the power transmission unit groups installed in a passage along which the moving body travels, and the power conversion unit is configured to supply or stop power to each of the power transmission unit groups. The control unit controls the power conversion unit to supply power to the power transmission unit groups that satisfy a power transmission condition including a relative distance of the power transmission coil to the power receiving coil of the moving body being equal to or less than a predetermined threshold based on position information indicating the position of the moving body detected by the position detection unit, and does not control the power conversion unit to supply power to the power transmission unit groups that do not satisfy the power transmission condition. The control unit detects or estimates a destination position of the moving body, identifies the power transmission unit groups installed at the destination, and controls the power conversion unit to cause a current to flow into the identified power transmission unit group before the moving body enters an area in which the identified power transmission unit group is installed.

[0009] According to this aspect, the supply or stop of power from the power conversion unit is controlled depending on whether or not a power transmission condition is satisfied, including the relative distance of the power transmitting coil to the power receiving coil being equal to or less than a predetermined threshold value. Therefore, the standby current that constantly flows into the power transmitting coil can be reduced compared to an aspect in which the input impedance of the power transmitting resonant circuit is controlled. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a power supply system. [Diagram 2] FIG. 2 is a diagram showing an outline of the circuit configuration of a power supply device and a small mobility device. [Diagram 3] 1A and 1B are diagrams for explaining an opposing state and a non-opposing state of coils. [Figure 4] FIG. 11 is a diagram illustrating an outline of a circuit configuration of a power supply device and a small mobility device according to a second embodiment. [Diagram 5] FIG. 1 is a diagram showing an arrangement of a plurality of power transmitting unit groups. [Figure 6] This diagram shows a small mobility vehicle traveling within a factory where robots are operating. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A1. Embodiment 1 As shown in Fig. 1, the power supply system 10 wirelessly transmits power to a small mobility 200, which is a moving object. The small mobility 200 is, for example, a transport device that transports parts in a factory. The power supply system 10 is also called a non-contact power supply system. The power supply system 10 includes a power supply device 100, a transmission line 50, a line 60, a power source 70, and a sensor 80.

[0012] 2, the power supply device 100 includes a plurality of power transmitting coil units 110, a plurality of power conversion units 120, and a control unit 130. The power supply device 100 is also called a non-contact power supply device.

[0013] The power transmitting coil unit 110 supplies the power supplied from the power conversion unit 120 to the power receiving coil unit 210 provided in the small mobility 200. The power transmitting coil unit 110 is also called a power transmitting unit. As shown in FIG. 1, in the first embodiment, in a part of the moving range of the small mobility 200, a plurality of power transmitting coil units 110 of the power supply device 100 are buried or laid on the floor surface. In the embodiment, the floor surface is a surface parallel to the horizontal surface or a surface within +-10 degrees from the horizontal surface. Hereinafter, a plurality of power transmitting coil units 110 may be collectively referred to as a power transmitting unit group G1. In the example shown in FIG. 1, 20 power transmitting coil units 110 arranged in 4 rows and 5 columns are regarded as one power transmitting unit group G1, and two power transmitting unit groups G1 are illustrated. Each of the power transmitting unit groups G1 is connected in parallel to the power conversion unit 120 via a transmission line 50.

[0014] 2, each power transmitting coil unit 110 includes a power transmitting coil 111 and a capacitor 112 connected in series. The power transmitting coil 111 and the capacitor 112 configure a power transmitting resonant circuit. The power transmitting resonant circuit is also called a power transmitting circuit.

[0015] The power conversion unit 120 generates power to be transmitted to the power receiving coil unit 210. The power conversion unit 120 includes a power factor correction circuit 121, an inverter circuit 122, and a filter 123. The power factor correction circuit 121 rectifies and boosts the AC power supplied from the power source 70, converts it into DC power, and improves the power factor of the power supply device 100 as a load. The inverter circuit 122 converts the DC power generated by the power factor correction circuit 121 into AC power of a desired frequency, and supplies the AC power to the power transmitting coil unit 110. The inverter circuit 122 includes, for example, a full bridge circuit including four switching transistors. The four switching transistors included in the inverter circuit 122 are turned on or off according to the control of the control unit 130, thereby switching between supplying and stopping the supply of the AC power to the power transmitting coil unit 110. The filter 123 passes only AC power of a predetermined frequency band among the AC power input from the inverter circuit 122. The filter 123 includes a fourth-order filter composed of a coil 31 and a capacitor 32 .

[0016] The control unit 130 controls the inverter circuit 122 of the power conversion unit 120 so that AC power of a desired frequency is supplied to the power transmitting coil unit 110. The control unit 130 also controls the inverter circuit 122 of the power conversion unit 120 so as to stop the supply of AC power to the power transmitting coil unit 110. The functions of the control unit 130 are realized by, for example, a microcomputer including a processor, a memory, and the like. The conditions under which the control unit 130 controls the inverter circuit 122 to supply power to the power transmitting coil unit 110 will be described later.

[0017] 1 is a line that connects the power conversion unit 120 and the power transmission unit group G1. The line 60 is a line that connects the power source 70 and the power feeding device 100. The power source 70 is an AC power source that supplies AC power to the power conversion unit 120.

[0018] The sensor 80 is a position detector used by the control unit 130 to detect the position of the small mobility 200. The sensor 80 is, for example, a camera arranged in the vicinity of an area in which the power transmitting coil unit 110 is installed. The sensor 80 captures an image of the power transmitting coil unit 110 at predetermined time intervals, and transmits the captured image data to the control unit 130 by communication. The sensor 80 is also referred to as a position detection unit.

[0019] The small mobility 200 includes a power receiving coil unit 210, a power conversion unit 220, a battery 230, and a control unit 240. The small mobility 200 travels using a motor driven by electric power charged in the battery 230 as a power source.

[0020] The power receiving coil unit 210 receives power from the power transmitting coil unit 110. The power receiving coil unit 210 includes a power receiving coil 211 and a capacitor 212 connected in series. The power receiving coil unit 210 is also referred to as a power receiving unit. The power receiving coil 211 and the capacitor 212 form a power receiving resonant circuit. As shown in FIG. 1, when the small mobility 200 is stopped on the power transmitting coil unit 110, the power receiving coil 211 of the power receiving coil unit 210 is arranged to face the power transmitting coil 111 of the power transmitting coil unit 110.

[0021] 2, when an AC voltage is applied to the power transmitting coil 111 and an AC current flows through the power transmitting coil 111 in a state where the power receiving coil 211 and the power transmitting coil 111 of the power transmitting coil unit 110 face each other, a magnetic flux is induced in the power transmitting coil 111. This induced magnetic flux interlinks with the power receiving coil 211, so that the power receiving coil 211 receives power from the power transmitting coil 111. A power conversion unit 220 is connected to the power receiving coil unit 210.

[0022] The power conversion unit 220 rectifies the electromotive force induced in the power receiving coil 211 to generate DC power. The generated DC power is supplied to the battery 230. The battery 230 stores the DC power supplied from the power supply device 100. The control unit 240 controls each unit of the small mobility 200. For example, when receiving a supply of power, the control unit 240 controls the power conversion unit 220 to receive the power.

[0023] Hereinafter, a condition under which the control unit 130 causes the power conversion unit 120 to supply power to the power transmitting coil unit 110 will be described. This condition is also referred to as a power transmission condition. In the first embodiment, the power transmission condition is that the relative distance of the power transmitting coil 111 to the power receiving coil 211 is equal to or less than a predetermined threshold. The control unit 130 controls the inverter circuit 122 of the power conversion unit 120 to supply power to the power transmitting unit group G1 including the power transmitting coil 111 that satisfies the power transmission condition.

[0024] On the other hand, when the power transmission condition is not satisfied for any of the power transmitting coils 111 included in the power transmitting unit group G1, the control unit 130 controls the inverter circuit 122 of the power conversion unit 120 so as not to supply power to the power transmitting unit group G1.

[0025] As shown in Fig. 3, the "facing state" in which the power transmitting coil 111 and the power receiving coil 211 face each other includes a "direct facing state" and a "partial overlap state." The coil plane is parallel to the X-axis and the Y-axis. The direction perpendicular to the coil plane is the Z-axis. The coil plane is a surface that is surrounded by a loop-shaped wiring and functions as a loop-shaped coil.

[0026] The "front facing state" refers to a state in which the center of the coil surface of the power transmitting coil 111 and the center of the coil surface of the power receiving coil 211 coincide with each other, and one of the coil surfaces of the power transmitting coil 111 and the power receiving coil 211 entirely overlaps the other. The coil surface of the power transmitting coil 111 is larger than the coil surface of the power receiving coil 211. The "partial overlap state" refers to a state in which the coil surface of the power receiving coil 211 partially overlaps the coil surface of the power transmitting coil 111. In the "partial overlap state", the overlapping area of ​​the coil surface of the power transmitting coil 111 and the coil surface of the power receiving coil 211 is smaller than the overlapping area of ​​the coil surface of the power transmitting coil 111 and the coil surface of the power receiving coil 211 in the front facing state.

[0027] Also, the "non-facing state" in which the power receiving coil 211 does not face the power transmitting coil 111 includes a "boundary state," a "separated state," and an "isolated state." The "boundary state" is a state in which the coil surface of the power receiving coil 211 does not overlap the coil surface of the power transmitting coil 111, and an edge of the coil surface of the power transmitting coil 111 overlaps an edge of the coil surface of the power receiving coil 211. As shown in the figure, one edge of the coil surface of the power transmitting coil 111 and one edge of the coil surface of the power receiving coil 211 are at the same position in the X-axis direction. In the "boundary state," the facing area between the coil surface of the power transmitting coil 111 and the coil surface of the power receiving coil 211 is equal to zero.

[0028] The "separated state" is a state in which the coil surface of the power transmitting coil 111 does not overlap with the coil surface of the power receiving coil 211, and furthermore, the edge of the coil surface of the power transmitting coil 111 does not overlap with the edge of the coil surface of the power receiving coil 211. As shown in the figure, the edge of the coil surface of the power transmitting coil 111 and the edge of the coil surface of the power receiving coil 211 are at different positions in the X-axis direction. In the "separated state", the coil surface of the power transmitting coil 111 and the coil surface of the power receiving coil 211 are completely separated. The "isolated state" is a state in which the power transmitting coil 111 and the power receiving coil 211 face each other, but are isolated from each other by a distance greater than the distance at which the power transmitting coil 111 and the power receiving coil 211 are not electromagnetically coupled.

[0029] In the first embodiment, the power transmitting coil 111 and the power receiving coil 211 facing each other refers to a state in which the power transmitting coil 111 and the power receiving coil 211 are in a “directly facing state” or a state in which the power transmitting coil 111 and the power receiving coil 211 are in a “partially overlapping state.” When the power transmitting coil 111 and the power receiving coil 211 face each other, the relative distance between the power transmitting coil 111 and the power receiving coil 211 is a distance at which the power transmitting coil 111 and the power receiving coil 211 can be electromagnetically coupled.

[0030] There is a case where the small mobility 200 enters an area where any of the power transmission unit groups G1 are installed, and the distance between the power receiving coil 211 of the small mobility 200 and any of the power transmission coils 111 included in the power transmission unit group G1 becomes equal to or less than a predetermined threshold. In this case, the power transmission condition is satisfied. In addition, the power receiving coil 211 and any of the power transmission coils 111 do not necessarily have to face each other. When the small mobility 200 moves fast, if the supply of power to the power transmission unit group G1 is started under the control of the control unit 130 after the small mobility 200 enters an area where any of the power transmission unit groups G1 are installed, the timing of starting power supply to the small mobility 200 may be delayed. In such a case, it is desirable to start the supply of power to the power transmission unit group G1 under the control of the control unit 130 before the small mobility 200 enters an area where the power transmission unit group G1 is installed. In this case, before the small mobility 200 enters an area where any of the power transmission unit groups G1 are installed, the distance between the power receiving coil 211 of the small mobility 200 and any of the power transmission coils 111 may become equal to or less than a predetermined threshold, and the power transmission condition may be satisfied. The predetermined threshold is determined in consideration of the operation of the power supply system 10 and the small mobility 200.

[0031] For example, every time image data is received from the sensor 80, the control unit 130 determines the position of the small mobility 200 from the received image data. Specifically, the control unit 130 determines whether or not the small mobility 200 is within a range in which any of the power transmission unit groups G1 are installed from the image data received from the sensor 80. When the small mobility 200 is within a range in which any of the power transmission unit groups G1 are installed, the control unit 130 identifies the power transmission unit group G1 in which the small mobility 200 is located. When the small mobility 200 is within a range in which any of the power transmission unit groups G1 are installed, the control unit 130 controls the power conversion unit 120 corresponding to that power transmission unit group G1 to start supplying power to the power transmission unit group G1.

[0032] Moreover, when the relative distance between the power transmitting coil 111 and the power receiving coil 211 exceeds the threshold, the power transmission condition is not satisfied. The power transmission condition is not satisfied, for example, when the small mobility 200 is not within a range in which any of the power transmitting unit groups G1 is installed.

[0033] For example, after the control unit 130 starts supplying power to the power transmission unit group G1, if the control unit 130 determines from image data received from the sensor 80 that the small mobility 200 is no longer within the range in which the power transmission unit group G1 is installed, the control unit 130 controls the power conversion unit 120 corresponding to the power transmission unit group G1 to stop the supply of power to the power transmission unit group G1.

[0034] In the first embodiment, the control unit 130 determines whether or not a power transmission condition is satisfied, including whether the relative distance of the power transmitting coil 111 to the power receiving coil 211 is equal to or smaller than a predetermined threshold, based on information acquired from the sensor 80. The control unit 130 switches between supplying and stopping the supply of power from the power conversion unit 120 to the power transmitting unit group G1, depending on the result of the determination. Therefore, compared to the technique described in Patent Document 1, which controls the input impedance of a resonant circuit for power transmission, the standby current that constantly flows into the power transmitting coil 111 can be reduced.

[0035] A2. Embodiment 2 In the first embodiment, the supply of power from the power conversion unit 120 to the power transmitting coil unit 110 or the stop of the supply of power is controlled for each power transmitting unit group G1. Therefore, the power transmitting unit group G1 to which power is supplied from the power conversion unit 120 includes a power transmitting coil unit 110 including a power transmitting coil 111 facing the power receiving coil 211, and a power transmitting coil unit 110 including a power transmitting coil 111 not facing the power receiving coil 211.

[0036] In the second embodiment, in addition to the configuration described in the first embodiment, the following configuration is provided, so that whether or not power transmission is performed is controlled for each power transmission coil unit 110. The following description will focus on the differences from the first embodiment. Configurations that are not specifically mentioned in the following description are the same as those in the first embodiment.

[0037] 4, the control unit 130 controls the input impedance of each power transmitting resonant circuit such that the input impedance of the power transmitting resonant circuit including the power transmitting coil 111 not facing the power receiving coil 211 is greater than the input impedance of the power transmitting resonant circuit including the power transmitting coil 111 facing the power receiving coil 211. The input impedance is also referred to as impedance.

[0038] Specifically, for a power transmitting resonant circuit including the power transmitting coil 111 facing the power receiving coil 211, the control unit 130 adjusts the inductance L of the power transmitting coil 111 so that the resonant frequency frt coincides with the fundamental frequency fsw of the AC power. g1 and the capacitance C of the capacitor 112 g1 At least one of the above is set. When the resonant frequency frt coincides with the fundamental frequency fsw of the AC power, the resonant condition of the power transmitting resonant circuit is established. Therefore, the power transmitting resonant circuit including the power transmitting coil 111 facing the power receiving coil 211 is in a resonant state. The fundamental frequency fsw of the AC power is the fundamental frequency of the AC power supplied from the power conversion unit 120 to the power transmitting coil unit 110.

[0039] In addition, for a power transmitting resonant circuit including a power transmitting coil 111 that does not face the power receiving coil 211, the control unit 130 adjusts the inductance L of the power transmitting coil 111 so that the resonant frequency frt does not match the fundamental frequency fsw of the AC power. g1 and the capacitance C of the capacitor 112 g1 At least one of the above is set. When the resonant frequency frt does not match the fundamental frequency fsw of the AC power, the resonant condition of the power transmitting resonant circuit is not established. In this case, the power transmitting resonant circuit including the power transmitting coil 111 that is not opposed to the power receiving coil 211 is in a non-resonant state. v and the capacitance C of the capacitor 212 v It is assumed that the resonant frequency frr is set so that the resonant condition of the power receiving resonant circuit is established and the resonant frequency frr coincides with the fundamental frequency fsw of the AC power.

[0040] In a resonant state, the imaginary part of the input impedance of the power transmitting resonant circuit has a value close to 0. On the other hand, in a non-resonant state, the imaginary part of the input impedance of the power transmitting resonant circuit does not have a value close to 0. In other words, the input impedance of a power transmitting resonant circuit in a resonant state is smaller than the input impedance of a power transmitting resonant circuit in a non-resonant state. For this reason, in a power transmitting resonant circuit in a non-resonant state, the inflow of current is suppressed more than in a power transmitting resonant circuit in a resonant state.

[0041] For a power transmitting resonant circuit including the power transmitting coil 111 not facing the power receiving coil 211, an input impedance is set so as not to satisfy the resonance condition, so that power transmission from the power transmitting coil unit 110 to the power receiving coil unit 210 can be suppressed. On the other hand, for a power transmitting resonant circuit including the power transmitting coil 111 facing the power receiving coil 211, an input impedance is set so as to satisfy the resonance condition, so that power transmission from the power transmitting coil unit 110 to the power receiving coil unit 210 is not suppressed.

[0042] In the example shown in FIG. 4, the capacitor 112 has a capacitance C g1Therefore, the control unit 130 controls the capacitance C of the capacitor 112. g1 By changing the inductance L of the power transmitting coil 111, the input impedance of the power transmitting resonant circuit is controlled. g1 In the facing state, the inductance L of the power transmitting coil 111 can be changed by the control of the control unit 130. g1 In the non-facing state, the inductance L of the power transmitting coil 111 is set to a value that satisfies the resonance condition. g1 is set to a value that does not satisfy the resonance condition.

[0043] Alternatively, a configuration in which a variable capacitor is used as the capacitor 112 and a configuration in which a variable coil is used as the power transmitting coil 111 may be used in combination. g1 and the capacitance C of the capacitor 112 is reduced. g1 Therefore, the inductance L of the power transmitting coil 111 can be reduced. g1 and the capacitance C of the capacitor 112 g1 In comparison with the case where only one of the above is set, the input impedance can be made larger.

[0044] Alternatively, the power transmitting resonant circuit may be configured to include a variable resistor, and the input impedance of the power transmitting resonant circuit may be controlled by controlling the resistance value of the variable resistor.

[0045] In this way, in the second embodiment, among the multiple power transmitting coil units 110 included in the power transmitting unit group G1 to which power is supplied from the power conversion unit 120, power transmission from the non-opposing power transmitting coil 111 to the power receiving coil 211 is suppressed. On the other hand, power transmission from the opposing power transmitting coil 111 to the power receiving coil 211 is not suppressed. In this way, power transmission to the power receiving coil unit 210 can be controlled for each power transmitting coil unit 110. Since unnecessary power transmission is not performed for the power transmitting coil units 110 that do not need to transmit power, power can be supplied efficiently.

[0046] A3. Embodiment 3 Furthermore, the power conversion unit 120 may supply power not only to the power transmitting coil unit 110 in which the relative distance between the power transmitting coil 111 and the power receiving coil 211 is equal to or less than a threshold, but also to adjacent power transmitting coil units 110.

[0047] Specifically, the transmission conditions are as follows: (i) the relative distance between the power transmitting coil 111 and the power receiving coil 211 included in the small mobility 200 is equal to or less than a threshold value; or (ii) being another power transmitting unit group G1 adjacent to the power transmitting unit group G1 that satisfies the condition that the relative distance of the power transmitting coil 111 to the power receiving coil 211 of the small mobility 200 is equal to or less than a threshold value; This may also be the case.

[0048] For the power transmitting unit group G1 corresponding to the above (ii), a case is assumed in which the relative distance of the power transmitting coil 111 to the power receiving coil 211 of the small mobility 200 is equal to or less than a threshold, and a case is assumed in which the relative distance of the power transmitting coil 111 to the power receiving coil 211 of the small mobility 200 exceeds a threshold. In the third embodiment, the power transmitting unit group G1 corresponding to (ii) may be adjacent to the power transmitting unit group G1 corresponding to (i). For the power transmitting unit group G1 corresponding to (ii), the relative distance of the power transmitting coil 111 to the power receiving coil 211 of the small mobility 200 is not important. For example, when at least a part of the boundary of the area in which the power transmitting unit group G1 corresponding to (i) is installed overlaps with at least a part of the boundary of the area in which the other power transmitting unit group G1 is installed, the other power transmitting unit group G1 may be determined to be adjacent to the power transmitting unit group G1 corresponding to (i).

[0049] Alternatively, when the distance in a horizontal plane between the boundary of the area in which the power transmission unit group G1 corresponding to (i) is installed and the boundary of the area in which the other power transmission unit group G1 is installed is shorter than a preset distance, it may be determined that the other power transmission unit group G1 is adjacent to the power transmission unit group G1 corresponding to (i). In this case, it is preferable that the distance between the boundary of the power transmission unit group G1 and the boundary of the other power transmission unit group G1 is a distance that the small mobility 200 can straddle. This is to continue the power supply to the small mobility 200.

[0050] For example, as shown in Fig. 5, a plurality of power transmission unit groups G1 are installed in a passage along which the small mobility 200 travels. In Fig. 5, the power source 70, the sensor 80, the control unit 130, and the like are omitted from illustration. The small mobility 200 is in an area in which the power transmission unit group G112 is installed among the plurality of power transmission unit groups G1. In this case, the control unit 130 determines that the power transmission unit group G111, the power transmission unit group G113, the power transmission unit group G121, and the power transmission unit group G122, which are arranged around the power transmission unit group G112, are power transmission unit groups adjacent to the power transmission unit group G112. The control unit 130 controls the power conversion unit 120 so that power is supplied to the adjacent power transmission unit groups.

[0051] For example, when the small mobility 200 moves from the power transmission unit group G1 in which it is currently located, the power conversion unit 220 starts supplying power to another adjacent power transmission unit group G1 prior to the entry of the small mobility 200. Therefore, even if the small mobility 200 is moving, power can be continuously supplied to the small mobility 200. Also, the time until the current flows into the power transmission coil 221 can be shortened compared to the case where the entry of the small mobility 200 into the power transmission unit group G1 is detected and then a current is caused to flow into the power transmission unit group G1.

[0052] Also, it is assumed that the direction in which the small mobility 200 enters the multiple power transmission unit groups G1 is constant. In the example shown in FIG. 5, it is assumed that the small mobility 200 enters from the row in which the power transmission unit groups G111, G121, G131, and G141 are installed in a direction intersecting this row. In this case, for the power transmission unit groups G111, G121, G131, and G141, the control unit 130 may control the power conversion unit 120 so that power is constantly supplied. Alternatively, the control unit 130 may estimate the movement direction of the small mobility 200 based on the orientation of the small mobility 200 and the current position of the small mobility 200 from image data acquired by a camera, which is the sensor 80, for example. In this case, it is assumed that the control unit 130 estimates the movement direction of the small mobility 200. The control unit 130 may supply power from the power conversion unit 220 to one or more power transmission unit groups G1 arranged in the estimated movement direction.

[0053] In addition, it is preferable that the output voltages of the power conversion units 120 that supply power to each of the power transmission unit groups G1 are phase-synchronized. This is to continue supplying power to the small mobility 200 while the small mobility 200 moves across multiple power transmission unit groups G1.

[0054] A4. Embodiment 4 In the first embodiment, an example in which the sensor 80 is a camera has been described. The sensor 80 is not limited to a camera. A weight sensor or a load switch installed on a floor may be used as the sensor 80. When a load is received, the weight sensor or the load switch transmits a detection signal to the control unit 130 by wireless communication. For example, a plurality of weight sensors or load switches may be installed at the boundary of the area in which the power transmission unit group G1 is installed. When the small mobility 200 passes through the boundary of the area in which the power transmission unit group G1 is installed, the weight sensor or the load switch transmits a detection signal indicating that a load has been received to the control unit 130. Note that the control unit 130 is assumed to have stored information indicating the positions at which the weight sensors or the load switches are respectively arranged in a memory in advance. The control unit 130 can determine which power transmission unit group G1 the small mobility 200 has entered from the arrangement position of the weight sensor or the load switch that is the source of the detection signal.

[0055] Alternatively, a laser sensor may be used as the sensor 80. For example, one or more laser sensors may be disposed at positions capable of detecting an object passing through the boundary of the area in which the power transmission unit group G1 is installed. When the small mobility 200 passes through the boundary of the area in which the power transmission unit group G1 is installed, the laser sensor transmits a detection signal indicating that the passage has been detected to the control unit 130. Note that the control unit 130 is assumed to have stored in advance in memory information indicating the positions at which the laser sensors are disposed. The control unit 130 can determine which power transmission unit group G1 the small mobility 200 has entered based on the detection signal received from the laser sensor.

[0056] Also, for example, assume that a gate that automatically opens and closes upon detecting the small mobility 200 is installed in a passageway leading to an area where the power transmission unit group G1 is installed. In this case, when the control unit 130 receives a detection signal from the gate indicating that the gate has been opened, the control unit 130 may determine that the small mobility 200 has entered the area where the power transmission unit group G1 is installed.

[0057] A5. Embodiment 5 In the first and third embodiments, an example has been described in which a position detector provided outside the small mobility 200 is used as the sensor 80. Alternatively, a position detector provided in the small mobility 200 may be used as the sensor 80. For example, the small mobility 200 may be provided with an antenna and a GPS (Global Positioning System) receiver. The small mobility 200 may transmit position information received by the GPS receiver and information identifying the small mobility 200 to the control unit 130 at predetermined intervals. The control unit 130 determines which power transmission unit group G1 the small mobility 200 has entered from the position information received from the small mobility 200. The control unit 130 can individually detect the position of the small mobility 200 by the position detector provided in each small mobility 200. The position detector provided in the small mobility 200 is also called a first position detector. The position detector installed in a fixed manner is also called a second position detector. In addition, as the sensor 80, a position detector installed outside the small mobility 200 and a position detector equipped in the small mobility 200 may be used in combination. Alternatively, as the sensor 80, a position detector installed outside the small mobility 200 may not be used, and only the position detector equipped in the small mobility 200 may be used.

[0058] A6. Embodiment 6 The small mobility 200 may have a function of selecting not to receive power supply by itself. For example, assume that the power receiving condition under which the small mobility 200 can receive power supply is set to be that the power stored in the battery 230 is equal to or less than a reference value. In this case, when the power stored in the battery 230 exceeds the reference value, the control unit 240 of the small mobility 200 determines that the power supply is unnecessary and selects not to receive the power supply. The control unit 240 is also referred to as a selection unit.

[0059] When the control unit 240 selects not to receive power supply, it controls the power conversion unit 220 to prevent DC power from being generated from the electromotive force induced in the power receiving coil 211. In this way, the small mobility 200 selects whether or not to receive power so that it accepts power reception when the power receiving conditions are met, and does not accept power reception when the power receiving conditions are not met. Thus, power can be supplied at an appropriate timing according to the situation of the small mobility 200.

[0060] Alternatively, the small mobility 200 may be provided with a transmitter that outputs a prohibition signal indicating that power transmission is prohibited. For example, the control unit 240 of the small mobility 200 can cause the transmitter to continuously output the prohibition signal while the power receiving condition is not satisfied. The transmitter is also called a device. The control unit 130 monitors whether or not there is a small mobility 200 that is outputting a prohibition signal in the area where the power transmission unit group G1 is installed. For example, the small mobility 200 that is outputting a prohibition signal may enter the power transmission unit group G1 to which power is being supplied. In this case, the control unit 130 controls the power conversion unit 120 to stop the supply of power to the power transmission unit group G1. Also, for example, the small mobility 200 that is outputting a prohibition signal and another small mobility 200 that is not outputting a prohibition signal may enter the power transmission unit group G1 to which power is not being supplied. In this case, the control unit 130 controls the power conversion unit 120 to not supply power to the power transmission unit group G1.

[0061] Also, assume that the small mobility 200 is traveling to perform maintenance on the power transmission unit group G1. In this case, the small mobility 200 may continuously output a prohibition signal regardless of the power receiving conditions. For example, even if the small mobility 200 is in an area where the power transmission unit group G1 is installed, when the small mobility 200 outputs a prohibition signal, the control unit 130 does not allow the corresponding power conversion unit 120 to supply power to the power transmission unit group G1. In this way, power can be supplied at an appropriate timing according to the state of the small mobility 200.

[0062] The transmitter that outputs the prohibition signal may be carried by a person. For example, a worker who works on or near the power transmitting unit group G1 may carry the transmitter. When the control unit 130 detects the output of the prohibition signal within a preset range from the power transmitting unit group G1, the control unit 130 does not allow the power conversion unit 120 corresponding to the power transmitting unit group G1 to supply power.

[0063] The transmitter that outputs the prohibition signal may be provided only in the small mobility 200, and the person may not carry a transmitter. Alternatively, only the person may carry a transmitter that outputs the prohibition signal, and the small mobility 200 may not be provided with a transmitter. Furthermore, or alternatively, the small mobility 200 may be provided with a transmitter, and the person may also carry a transmitter.

[0064] A7.Embodiment 7 In the first embodiment, the control unit 130 detects the location of the small mobility 200, and supplies power to the power transmission unit group G1 arranged at that location.

[0065] As shown in FIG. 6, an example will be described in which the small mobility 200 travels in a factory where robots R11, R12, R13, R14, and R15 operate to assemble parts. In FIG. 6, the power source 70, the control unit 130, and the like are omitted from the illustration. The small mobility 200 includes five small mobility vehicles 200a to 200g. Hereinafter, the small mobility vehicles 200a to 200d may be collectively referred to as the small mobility vehicle 200. In the factory, the robots R11, R12, R13, R14, and R15 operate to assemble parts. The robots R11, R12, R13, R14, and R15 may be collectively referred to as the robot R1. The small mobility 200 autonomously travels in the factory to receive a workpiece from the robot R1 and transport the workpiece to another robot R1. The small mobility 200 functions as a so-called automated guided vehicle (AGV).

[0066] In the example shown in FIG. 6, the small mobility objects 200a to 200e are performing transportation work. The small mobility objects 200f to 200g are waiting outside the travel route in preparation for the occasion when the small mobility objects 200a to 200e are unable to perform transportation work due to maintenance or a malfunction. The small mobility object 200 is assumed to include a processor and a memory. The memory included in the small mobility object 200 stores a travel program that controls the small mobility object 200 to travel a predetermined travel route at a determined speed. The processor included in the small mobility object 200 executes the travel program, thereby realizing an autonomous driving function of the small mobility object 200.

[0067] In the example shown in FIG. 6, a magnetic tape M1 indicating the travel route of the small mobility 200 is attached to the floor of a factory. The small mobility 200 is equipped with a magnetic induction sensor. The small mobility 200 travels along the travel route indicated by the magnetic tape M1. In addition, magnetic markers indicating the positions of the corners are provided at corners in the travel route. The speed at which the small mobility 200 travels along a straight route and the speed at which the small mobility 200 turns a corner are determined in advance. The speed at which the small mobility 200 turns a corner is set to be slower than the speed at which the small mobility 200 travels along a straight route. The small mobility 200 determines that it is passing a corner from the magnetic marker indicating the position of the corner. Therefore, the small mobility 200 decelerates when turning a corner, and accelerates to the original speed after turning the corner.

[0068] The small mobility vehicles 200a and 200b receive the workpiece WK1 from the robot R13 and transport the workpiece WK1 to the robot R15. The small mobility vehicles 200a and 200b are set with information indicating the position of the corner to be turned at in advance. Furthermore, the small mobility vehicles 200a and 200b are set with information indicating which robot R1 they should stop near. In this way, the small mobility vehicles 200a and 200b can travel the same route.

[0069] The small mobility vehicles 200c, 200d, and 200e receive the workpiece WK2 from the robot R12 or R11, and transport the workpiece WK2 to the robot R14. The small mobility vehicles 200c, 200d, and 200e are set with information indicating the position of the corner to be turned at in advance. Furthermore, the small mobility vehicles 200c, 200d, and 200e are set with information indicating which robot R1 they should stop near. Therefore, the small mobility vehicles 200c, 200d, and 200e can travel the same route.

[0070] Also, it is assumed that a plurality of power transmission unit groups G1 are installed on a passageway along which the small mobility 200 travels. The small mobility 200 can receive a supply of power while traveling.

[0071] In the seventh embodiment, the control unit 130 estimates the destination of the small mobility 200. As described above, the travel speed of the small mobility 200 on a straight route and the travel speed at a corner are set in advance. Therefore, the control unit 130 can estimate the current position of the small mobility 200 based on the time when the small mobility 200 starts traveling, the travel route of the small mobility 200, and the set value of the travel speed. In this case, the control unit 130 does not need to receive position information from the small mobility 200. In addition, the control unit 130 can estimate the power transmission unit group G1 of the destination where the small mobility 200 will enter from the estimation result of the current position of the small mobility 200. The control unit 130 controls the corresponding power conversion unit 220 so that a current flows into the power transmission unit group G1 of the destination before the small mobility 200 enters the estimated power transmission unit group G1 of the destination.

[0072] Therefore, power can be continuously supplied to the small mobility 200 traveling across a plurality of power transmission unit groups G1. Also, the time until current flows into the power transmission coil 221 can be shortened compared to the case where current flows into the power transmission unit group G1 after detecting that the small mobility 200 has entered the power transmission unit group G1.

[0073] Also, as shown in FIG. 6, when the small mobility 200 transports the workpieces WK1 and WK2 in an assembly plant according to the assembly process, a travel plan including the route traveled by the small mobility 200 and the number of workpieces transported by the small mobility 200 is determined in advance. It is assumed that travel plan information indicating the travel plan is stored in advance in the memory provided in the control unit 130. The memory provided in the control unit 130 is also referred to as a first storage unit. The control unit 130 may calculate in advance the amount of energy consumed by the small mobility 200 from the travel plan and the weight of one workpiece, and estimate the timing when the small mobility 200 needs to be charged and the power required for charging. When it is time for the small mobility 200 to need to be charged, the control unit 130 may control the corresponding power conversion unit 220 so that a current flows into the power transmission unit group G1 installed on the travel route before the small mobility 200 enters the power transmission unit group G1 at the estimated destination.

[0074] In addition, maintenance is performed on the small mobility 200 that has been performing transportation work continuously for a predetermined time. For example, the small mobility 200 counts the elapsed time from the start time of traveling. The small mobility 200 is controlled by a traveling program so as to move outside the traveling route when the elapsed time reaches a predetermined time. Power may be supplied to the small mobility 200 at the timing when the small mobility 200 deviates from the traveling route. In such a case, power is supplied to the power transmission unit group G1 by the power transmission unit group G1 installed outside the traveling route.

[0075] In this way, planned power supply to the small mobility 200 after the small mobility 200 has performed a transport operation continuously for a determined time from the travel start time is called a power supply plan. A memory included in the control unit 130 stores a predetermined time as an elapsed time from the travel start time as power supply plan information indicating the power supply plan. The memory included in the control unit 130 is also called a second storage unit. Before the small mobility 200 deviates from the travel route and enters, the control unit 130 controls the corresponding power conversion unit 220 so that a current flows into the power transmission unit group G1 installed outside the travel route. When power is supplied to the small mobility 200 from the power transmission unit group G1 installed outside the travel route, the power transmission unit group G1 does not need to be provided on the travel route.

[0076] Alternatively, the control unit 130 may control the corresponding power conversion unit 220 so that current flows into a power transmission unit group G1 installed in a passage along which the small mobility 200, which is scheduled to deviate from the driving route, will travel before moving outside the driving route.

[0077] Furthermore, when any of the small mobility vehicles 200 moves outside the travel route, any of the waiting small mobility vehicles 200f, 200g may move into the travel route and carry out the transport work.

[0078] A8.Embodiment 8 Alternatively, the control unit 130 may acquire detection data detected by a speed sensor or an acceleration sensor from the small mobility 200 through communication. In this case, it is assumed that the small mobility 200 is equipped with a speed sensor or an acceleration sensor. The detection data includes speed information indicating the speed or acceleration information indicating the acceleration. The control unit 130 can estimate the current position of the small mobility 200 based on the time when the small mobility 200 starts traveling, the traveling route of the small mobility 200, and the speed or acceleration. The control unit 130 can estimate the power transmission unit group G1 of the destination where the small mobility 200 will enter from the estimation result of the current position of the small mobility 200. The control unit 130 controls the corresponding power conversion unit 220 so that a current flows into the power transmission unit group G1 of the destination before the small mobility 200 enters the estimated power transmission unit group G1 of the destination. In this way, the destination of the small mobility 200 can be accurately estimated.

[0079] A9. Embodiment 9 In the seventh embodiment, an example has been described in which the control unit 130 estimates the destination of the small mobility 200 from the driving plan or the power supply plan. Alternatively, the control unit 130 may determine whether or not the small mobility 200 needs to be powered as follows.

[0080] The small mobility 200 is assumed to have a function of monitoring the state of charge (SOC) of the battery 230. The small mobility 200 determines the remaining amount of power charged in the battery 230 from the cell voltage of the battery 230 and the cell temperature of the battery 230. For example, the small mobility 200 is assumed to be controlled by a travel program so as to move outside the travel route when the remaining amount of power charged in the battery 230 falls below a certain value.

[0081] In this case, the control unit 130 may acquire charging information indicating the charging state of the battery 230 included in the small mobility 200 from the small mobility 200. The charging information indicating the charging state of the battery 230 is, for example, information indicating the ratio of the amount of power currently stored in the battery 230 to the total capacity that can be stored in the battery 230. The control unit 130 may determine that the battery 230 of the small mobility 200 needs to receive power when the capacity currently stored in the battery 230 indicated by the charging information falls below a predetermined reference value. For example, the control unit 130 controls the corresponding power conversion unit 220 so that a current flows into the power transmission unit group G1 installed outside the traveling route before the small mobility 200 deviates from the traveling route and enters. In such a case, the control unit 130 can predict the destination of the small mobility 200 regardless of the traveling plan and the power supply plan.

[0082] Furthermore, the control unit 130 may acquire, via communication, from the small mobility 200, time information indicating the charging time when the battery 230 of the small mobility 200 was most recently charged, and distance information indicating the distance traveled by the small mobility 200 from that time to the present. The most recently charged charge means that the battery 230 has not been charged since that charge. The control unit 130 can determine whether or not charging of the battery 230 of the small mobility 200 is necessary, depending on the distance traveled by the small mobility 200 from the charging time when the battery 230 was most recently charged.

[0083] Furthermore, when the battery 230 needs to be charged, for example, the control unit 130 controls the corresponding power conversion unit 220 so that a current flows into the power transmission unit group G1 installed outside the travel route before the small mobility 200 deviates from the travel route and enters. Alternatively, the control unit 130 may estimate that the small mobility 200 will move from its current position to the power transmission unit group G1 that is close. The control unit 130 estimates the destination of the moving body that needs to receive power, and supplies power from the corresponding power conversion unit 220 to the identified power transmission unit group G1 based on the estimation result of the destination of the small mobility 200. In this way, by using the charging information when estimating the destination, the destination of the small mobility 200 can be accurately estimated.

[0084] Furthermore, the control unit 130 does not need to acquire from the small mobility 200 time information indicating the charging time when the battery 230 was most recently charged. For example, the control unit 130 may store in memory as the charging time the time when the small mobility 200 was supplied with power, which is determined from image data captured by the camera of the sensor 80. The control unit 130 can determine whether or not the battery 230 of the small mobility 200 needs to be charged, based on the charging time stored in the memory and distance information acquired from the small mobility 200 and indicating the distance traveled by the small mobility 200 from the charging time.

[0085] A10. Embodiment 10 Furthermore, when the small mobility 200 does not travel along a fixed route, a travel plan such as the following may be determined in advance. In such a case, the control unit 130 may estimate the destination of the small mobility 200 from travel plan information indicating the travel plan of the small mobility 200. It is assumed that the travel plan information is stored in advance in the memory provided in the control unit 130. The travel plan indicates, for example, that the small mobility 200 moves to a set location at a set time. The travel plan information is, for example, information indicating a travel location associated with a travel time. Thus, the control unit 130 can efficiently estimate the destination of the small mobility 200 based on the travel plan information.

[0086] In addition, when the small mobility 200 does not travel around a fixed route, the following power supply plan may be determined in advance. In such a case, the control unit 130 may estimate the destination of the small mobility 200 from power supply plan information indicating the power supply plan of the small mobility 200. It is assumed that the power supply plan information is stored in advance in the memory provided in the control unit 130. The power supply plan indicates, for example, that the small mobility 200 is scheduled to supply power at a set time. The power supply plan information includes information indicating a scheduled power supply time at which the small mobility 200 is scheduled to supply power. For example, it is assumed that there is a small mobility 200 to which power supply is scheduled within a time period from the current time until 5 minutes have elapsed. The control unit 130 may estimate that the small mobility 200 will move to a power transmission unit group G1 that is close to the current position. Therefore, the control unit 130 can efficiently estimate the destination of the small mobility 200 based on the power supply plan information.

[0087] Furthermore, when multiple small mobility objects 200 are traveling within a factory, the small mobility objects 200 may have a function of communicating with other small mobility objects 200 and traveling without interfering with each other's traveling in order to avoid collisions. In such a case, the control unit 130 may estimate the destination of a small mobility object 200 on the premise that other small mobility objects 200 will not enter a predetermined range including the current position of a certain small mobility object 200 for a predetermined period of time. Therefore, the destination of the small mobility object 200 can be efficiently estimated.

[0088] A11. Embodiment 11 Furthermore, the control unit 130 may determine the position of the small mobility 200 as follows. The control unit 130 may determine whether or not the small mobility 200 is present in an area in which the power transmission unit group G1 is installed, based on a change in the amount of current from the power conversion unit 120 to the power transmission unit group G1. For example, a current sensor that detects the amount of current flowing out from the power conversion unit 120 is provided between the power conversion unit 120 and the power transmission unit group G1. Note that it is assumed that a constant amount of current flows from the power conversion unit 120 to the power transmission unit group G1, regardless of whether or not the small mobility 200 is present on the power transmission unit group G1. In the following description, it is assumed that the input impedance of the power transmission resonant circuit of the power transmission coil unit 110 described in the second embodiment is not controlled.

[0089] For example, suppose that the small mobility 200 enters the power transmission unit group G1, and any of the power transmission coils 111 included in the power transmission unit group G1 faces the power receiving coil 211 of the small mobility 200, and the power transmission resonant circuit including the power transmission coil 111 and the power receiving resonant circuit including the power receiving coil 211 are in a resonant state. In this case, the input impedance of the power transmission resonant circuit is lowered, so that the current flowing from the power conversion unit 120 to the power transmission unit group G1 increases. The control unit 130 may determine that the small mobility 200 is present in an area where the power transmission unit group G1 is installed when the amount of current flowing from the power conversion unit 120 to the power transmission unit group G1 increases to a predetermined reference value or more. In this way, the position of the small mobility 200 can be detected with a simple configuration without using the sensor 80, information on charging acquired from the small mobility 200, and the like.

[0090] Alternatively, each of the power transmitting coils 111 may be provided with a current sensor that detects the amount of current flowing into the power transmitting coil 111 or a voltage sensor that detects the voltage applied to the power transmitting coil 111. As described above, when the power transmitting coil 111 and the power receiving coil 211 face each other and the power transmitting resonant circuit including the power transmitting coil 111 and the power receiving resonant circuit including the power receiving coil 211 are in a resonant state, the current flowing from the power conversion unit 120 to the power transmitting unit group G1 increases. The control unit 130 can determine whether or not the small mobility 200 is present in the area where the power transmitting unit group G1 is installed, based on the detection value of the current sensor or voltage sensor. Furthermore, the control unit 130 can identify the power transmitting coil 111 that the power receiving coil 211 of the small mobility 200 faces.

[0091] A12.Embodiment 12 For example, assume that power supply systems 10A and 10B are provided in a factory. Each of the power supply systems 10A and 10B has the same configuration as the power supply system 10 shown in FIG. 1. In this case, the control unit 130 of the power supply system 10A may transmit information indicating whether or not the small mobility 200 exists in an area in which the power transmission unit group G1 to be controlled is installed to the control unit 130 provided in the power supply system 10B. The power transmission unit group G1 to be controlled by the control unit 130 of the power supply system 10A is the power transmission unit group G1 provided in the power supply system 10A. In addition, the control unit 130 of the power supply system 10A may receive information indicating whether or not the small mobility 200 exists in an area in which the power transmission unit group G1 provided in the power supply system 10B is installed, from the control unit 130 of the power supply system 10B.

[0092] For example, suppose that there are few small mobility objects 200 in the power transmission unit group G1 included in the power supply system 10A, and there are many small mobility objects 200 in the power transmission unit group G1 included in another power supply system 10. In such a case, the control unit 130 of the power supply system 10B can notify the small mobility objects 200 in the area where the power transmission unit group G1 is installed by communication to move to the power supply system 10A. This makes it possible to prevent the operation rate of the power supply system 10B from exceeding the power supply capacity of the power supply system 10B. By cooperation between multiple control units 130, power can be efficiently supplied to the small mobility objects 200.

[0093] A13.Embodiment 13 The control unit 130 may monitor the power supplied to the plurality of power transmission unit groups G1 during a determined period. For example, when the sum of the power supplied to the plurality of power transmission unit groups G1 per unit time exceeds a preset reference value, the control unit 130 may control each of the power conversion units 120 that supplies power to some of the power transmission unit groups G1 so as to limit the supply of power to the portion of the power transmission unit groups G1.

[0094] For example, if the amount of power supplied to the power transmission unit group exceeds the amount of power that can be supplied from the power source 70, the supply of power to some of the power transmission unit groups G1 can be stopped to avoid a power supply failure in the power supply system 10.

[0095] Furthermore, the control unit 130 may limit the supply of power to the power transmission unit group G1 that is located away from the position of the small mobility 200. The power transmission unit group G1 that is located away from the position of the small mobility 200 is, for example, the power transmission unit group G1 that is located at a distance from the small mobility 200 that is equal to or greater than a predetermined distance. This makes it possible to avoid a situation in which power cannot be continuously supplied to the small mobility 200.

[0096] The control unit 130 monitors the power supplied to the plurality of power transmission unit groups G1 for a determined period even after starting to limit the power supply. The control unit 130 continues to limit the power supply to some of the power transmission unit groups G1 until the total power supply in the determined period becomes equal to or less than a preset reference value. The control unit 130 may also continue to increase the number of power transmission unit groups G1 that are the targets of the power supply limit until the total power supply in the determined period becomes equal to or less than a preset reference value.

[0097] When the total power in the determined period falls below a preset reference value, the control unit 130 releases the control of the power supply to some of the power transmission unit groups G1. When the total power in the determined period falls below a reference value, the control unit 130 may stop increasing the number of power transmission unit groups G1 that are subject to the power supply restriction. Furthermore, the control unit 130 may gradually reduce the number of power transmission unit groups G1 that are subject to the restriction according to the total power in the determined period.

[0098] B. Other Embodiments In the first embodiment, an example has been described in which one power conversion unit 120 controls the supply of power to one power transmission unit group G1. However, one power conversion unit 120 may control the supply of power to two or more power transmission unit groups G1.

[0099] In the first embodiment, an example in which the power supply device 100 includes a plurality of power conversion units 120 has been described. However, the power supply device 100 may include one power conversion unit 120.

[0100] In embodiment 1, the control unit 130 identified the power transmission unit group G1 in which the small mobility 200 is located from the image data received from the sensor 80, but the control unit 130 may also identify the position within the power transmission unit group G1 in which the small mobility 200 is located from the image data received from the sensor 80.

[0101] In embodiment 1, an example was described in which the coil surface of the transmitting coil 111 is larger than the coil surface of the receiving coil 211, but the coil surface of the transmitting coil 111 may be the same size as the coil surface of the receiving coil 211, or may be smaller than the coil surface of the receiving coil 211.

[0102] In the example shown in FIG. 1, the multiple power transmitting coil units 110 included in the power transmitting unit group G1 are arranged in a matrix, but the power transmitting coil units 110 may also be arranged in a straight line.

[0103] The present disclosure is not limited to the above-mentioned embodiment, and can be realized in various configurations without departing from the spirit of the present disclosure. For example, the technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention column can be appropriately replaced or combined to solve some or all of the above-mentioned problems or to achieve some or all of the above-mentioned effects. Furthermore, if the technical feature is not described as essential in this specification, it can be appropriately deleted.

[0104] The features of the present disclosure are as follows: [Form 1] A non-contact power supply system (10) for supplying power to a moving object (200) including a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) that generates power to be transmitted to the power receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) that detects the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the group of power transmitting units that satisfy a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; Contactless power supply system. [Form 2] The wireless power supply system according to aspect 1, The control unit is power is supplied to the power receiving unit by controlling the impedance of the power transmitting circuit having the power transmitting coil facing the power receiving coil to be smaller than the impedance of the power transmitting circuit having the power transmitting coil not facing the power receiving coil; The impedance of the power transmission circuit having the power transmission coil not facing the power receiving coil is controlled to be larger than the impedance of the power transmission circuit having the power transmission coil facing the power receiving coil, thereby stopping the supply of power to the power receiving unit. Contactless power supply system. [Form 3] The wireless power supply system according to aspect 1 or 2, the position detection unit includes a first position detector that is provided on the moving body and detects the position of the moving body; The control unit acquires, from the first position detector, information indicating the position of the moving object detected by the first position detector as the position information. Contactless power supply system. [Form 4] The wireless power supply system according to any one of aspects 1 to 3, the position detection unit includes a second position detector that is provided outside the moving body and detects the position of the moving body, the control unit acquires, from the second position detector, information indicating the position of the moving object detected by the second position detector as the position information; Contactless power supply system. [Form 5] The wireless power supply system according to any one of aspects 1 to 4, the position detection unit includes a second position detector that is provided outside the moving body and detects the position of the moving body, the control unit acquires, from the second position detector, information indicating the position of the moving object detected by the second position detector as the position information; Contactless power supply system. [Form 6] The wireless power supply system according to any one of aspects 1 to 5, the one or more power transmission unit groups are a plurality of power transmission unit groups installed on a passage along which the moving object travels, the power conversion unit is set to supply or stop power for each of the power transmission unit groups; The control unit is Estimating a destination of the moving object; Identifying the power transmission unit group installed at the destination; controlling the power conversion unit so as to cause a current to flow into the identified group of power transmission units before the moving object enters an area in which the identified group of power transmission units is installed; Contactless power supply system. [Form 7] 7. The wireless power supply system according to claim 6, The control unit acquires speed information or acceleration information indicating a speed or an acceleration of the moving object from the moving object, and estimates the destination from the speed or the acceleration indicated by the speed information or the acceleration information. Contactless power supply system. [Form 8] The wireless power supply system according to aspect 6 or 7, Further comprising a first storage unit that stores predetermined travel plan information of the moving object, The control unit estimates the destination based on the driving plan information. Contactless power supply system. [Form 9] The wireless power supply system according to any one of aspects 6 to 8, The power supply system further includes a second storage unit that stores predetermined power supply plan information of the moving body. The control unit estimates the destination of the moving object based on the power supply plan information. Contactless power supply system. [Form 10] The wireless power supply system according to any one of aspects 6 to 9, A plurality of the moving bodies are traveling on the passage along which the moving body travels, the control unit estimates the destination of one of the moving bodies on the premise that another moving body will not enter a determined range including a current position of the one of the moving bodies for a predetermined period of time; Contactless power supply system. [Form 11] A wireless power supply system according to any one of aspects 1 to 10, the control unit determines whether or not the battery of the mobile body needs to be charged based on information on a charging time when the battery included in the mobile body was last charged and a distance traveled by the mobile body from the charging time. Contactless power supply system. [Form 12] The wireless power supply system according to any one of aspects 1 to 11, the control unit acquires charging information indicating a charging state of a battery included in the mobile object from the mobile object, and determines whether or not the battery of the mobile object needs to be charged based on the charging information. Contactless power supply system. [Form 13] The wireless power supply system according to any one of aspects 1 to 12, The moving object further includes a selection unit that selects whether or not the power receiving unit is allowed to receive power, The selection unit does not allow the power receiving unit to receive power when a state of the moving object does not satisfy a preset power receiving condition. Contactless power supply system. [Form 14] The wireless power supply system according to any one of aspects 1 to 13, The power transmission conditions are: (i) the relative distance of the power transmitting coil to the power receiving coil of the moving object is equal to or less than the threshold value; or (ii) being another power transmitting unit group adjacent to the power transmitting unit group that satisfies the condition that the relative distance of the power transmitting coil to the power receiving coil of the moving body is equal to or less than the threshold value; Contactless power supply system. [Form 15] The wireless power supply system according to any one of aspects 1 to 14, the control unit determines the position of the moving object based on a change in an amount of current flowing from the power conversion unit to the group of power transmitting units. Contactless power supply system. [Form 16] 16. The wireless power supply system according to claim 15, Each of the power transmitting coils is provided with a current sensor that detects an amount of current flowing into the power transmitting coil or a voltage sensor that detects a voltage applied to the power transmitting coil, The control unit determines the position of the moving object based on a detection value of the current sensor or the voltage sensor. Contactless power supply system. [Form 17] The wireless power supply system according to any one of aspects 1 to 16, the control unit transmits information indicating whether the moving object is present in an area in which the power transmission unit group to be controlled is installed to the control unit included in the other wireless power supply system; Contactless power supply system. [Form 18] The wireless power supply system according to any one of aspects 1 to 17, When the control unit detects that a device that outputs a prohibition signal indicating that power transmission is prohibited exists within a preset range from the power transmission unit group, the control unit does not allow the power conversion unit to supply power to the power transmission unit group. Contactless power supply system. [Form 19] A wireless power supply system according to any one of aspects 1 to 18, The one or more power transmitting unit groups include a plurality of the power transmitting unit groups, the control unit monitors power supplied from the power conversion unit to the plurality of power transmission unit groups during a determined period, and when a total sum of power during the determined period exceeds a preset reference value, controls the power conversion unit to limit the supply of power to some of the plurality of power transmission unit groups. Contactless power supply system. [Form 20] 20. The wireless power supply system according to claim 19, The part of the power transmitting unit group to which the supply of power is limited is the power transmitting unit group whose distance from the moving object is equal to or greater than a predetermined distance. Contactless power supply system. [Form 21] A wireless power supply system according to aspect 19 or aspect 20, the control unit controls the power conversion unit to stop supplying power to the power transmission unit group until the sum of the power becomes equal to or less than the reference value. Contactless power supply system. [Form 22] A wireless power supply system according to any one of aspects 19 to 21, The control unit is increasing the number of the power transmission unit groups that are targets of the power supply restriction until the sum of the power becomes equal to or less than the reference value; When the sum of the power becomes equal to or less than the reference value, stopping the increase in the number of the power transmission unit groups that are targets of the power supply restriction. Contactless power supply system. [Form 23] A non-contact power supply device (10) for supplying power to a moving object (200) including a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) that generates power to be transmitted to the power receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) that detects the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the group of power transmitting units that satisfy a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; Non-contact power supply device. [Explanation of symbols]

[0105] 10...power supply system, 80...sensor, 100...power supply device, 110...power transmission coil unit, 111...power transmission coil, 120...power conversion unit, 130...control unit, 200...small mobility, 210...power receiving coil unit, 211...power receiving coil, 220...power conversion unit, G1...power transmission unit group

Claims

1. A contactless power supply system (10) for supplying power to a moving body (200) equipped with a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit is Based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; The control unit is power is supplied to the power receiving unit by controlling the impedance of the power transmitting circuit having the power transmitting coil facing the power receiving coil to be smaller than the impedance of the power transmitting circuit having the power transmitting coil not facing the power receiving coil; The impedance of the power transmission circuit having the power transmission coil not facing the power receiving coil is controlled to be larger than the impedance of the power transmission circuit having the power transmission coil facing the power receiving coil, thereby stopping the supply of power to the power receiving unit. Contactless power supply system.

2. A contactless power supply system (10) for supplying power to a moving body (200) equipped with a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with the one or more power transmission unit groups are a plurality of power transmission unit groups installed on a passage along which the moving object travels, the power conversion unit is set to supply or stop power for each of the power transmission unit groups; The control unit is Based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; The control unit is Detecting or estimating a destination position of the moving object; Identifying the power transmission unit group installed at the destination; controlling the power conversion unit so as to cause a current to flow into the identified group of power transmission units before the moving object enters an area in which the identified group of power transmission units is installed; Contactless power supply system.

3. The non-contact power supply system according to claim 2, the position detection unit includes a first position detector that is provided on the moving body and detects the position of the moving body; The control unit acquires, from the first position detector, information indicating the position of the moving object detected by the first position detector as the position information. Contactless power supply system.

4. The non-contact power supply system according to claim 3, the position detection unit includes a second position detector that is provided outside the moving body and detects the position of the moving body, The control unit acquires, from the second position detector, information indicating the position of the moving object detected by the second position detector as the position information. Contactless power supply system.

5. The non-contact power supply system according to claim 2, the position detection unit includes a second position detector that is provided outside the moving body and detects the position of the moving body, The control unit acquires, from the second position detector, information indicating the position of the moving object detected by the second position detector as the position information. Contactless power supply system.

6. The non-contact power supply system according to claim 2, The control unit acquires speed information or acceleration information indicating a speed or an acceleration of the moving object from the moving object, and detects or estimates the position of the moving destination from the speed or the acceleration indicated by the speed information or the acceleration information. Contactless power supply system.

7. The non-contact power supply system according to claim 2, A first storage unit that stores predetermined travel plan information of the moving object, The control unit detects or estimates the destination position based on the driving plan information. Contactless power supply system.

8. The non-contact power supply system according to claim 2, The vehicle further includes a second storage unit that stores predetermined power supply plan information of the vehicle. The control unit detects or estimates the position of the destination of the moving object based on the power supply plan information. Contactless power supply system.

9. The non-contact power supply system according to claim 2, A plurality of the moving bodies are traveling on the passage along which the moving body travels, The control unit detects or estimates the destination position of one of the moving bodies on the premise that another moving body will not enter a predetermined range including a current position of the one of the moving bodies for a predetermined period of time. Contactless power supply system.

10. The non-contact power supply system according to claim 2, the control unit acquires charging information indicating a charging state of a battery included in the mobile object from the mobile object, and determines whether or not the battery of the mobile object needs to be charged based on the charging information. Contactless power supply system.

11. The non-contact power supply system according to claim 2, The moving object further includes a selection unit that selects whether or not the power receiving unit is allowed to receive power, The selection unit does not allow the power receiving unit to receive power when a state of the moving object does not satisfy a preset power receiving condition. Contactless power supply system.

12. The non-contact power supply system according to claim 2, the control unit determines the position of the moving object based on a change in an amount of current flowing from the power conversion unit to the group of power transmitting units. Contactless power supply system.

13. The non-contact power supply system according to claim 2, Each of the power transmitting coils is provided with a current sensor that detects an amount of current flowing into the power transmitting coil or a voltage sensor that detects a voltage applied to the power transmitting coil, The control unit determines the position of the moving object based on a detection value of the current sensor or the voltage sensor. Contactless power supply system.

14. A contactless power supply system (10) for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; the control unit determines whether or not the battery of the mobile body needs to be charged based on information on a charging time when the battery included in the mobile body was last charged and a distance traveled by the mobile body from the charging time. Contactless power supply system.

15. A contactless power supply system for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the group of power transmitting units that satisfy a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; The power transmission conditions are: (i) the relative distance of the power transmitting coil to the power receiving coil of the moving object is equal to or less than the threshold value; or (ii) another power transmitting unit group adjacent to the power transmitting unit group in which the relative distance of the power transmitting coil to the power receiving coil of the moving body is equal to or less than the threshold value; Contactless power supply system.

16. A contactless power supply system (10) for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; the control unit transmits information indicating whether the moving object is present in an area in which the power transmission unit group to be controlled is installed to the control unit included in the other wireless power supply system; Contactless power supply system.

17. A contactless power supply system (10) for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; When the control unit detects that a device that outputs a prohibition signal indicating that power transmission is prohibited exists within a preset range from the power transmission unit group, the control unit does not allow the power conversion unit to supply power to the power transmission unit group. Contactless power supply system.

18. A contactless power supply system (10) for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit, based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; The one or more power transmitting unit groups include a plurality of the power transmitting unit groups, the control unit monitors power supplied from the power conversion unit to the plurality of power transmission unit groups during a determined period, and when a total sum of power during the determined period exceeds a preset reference value, controls the power conversion unit to limit the supply of power to some of the plurality of power transmission unit groups. Contactless power supply system.

19. The contactless power supply system according to claim 18, The part of the power transmitting unit group to which the supply of power is limited is the power transmitting unit group whose distance from the moving object is equal to or greater than a predetermined distance. Contactless power supply system.

20. 20. The contactless power supply system according to claim 18, the control unit controls the power conversion unit to stop supplying power to the power transmission unit group until the sum of the power becomes equal to or less than the reference value. Contactless power supply system.

21. The contactless power supply system according to claim 20, The control unit is increasing the number of the power transmission unit groups that are targets of the power supply restriction until the sum of the power becomes equal to or less than the reference value; When the sum of the power becomes equal to or less than the reference value, stopping the increase in the number of the power transmission unit groups that are targets of the power supply restriction. Contactless power supply system.

22. A non-contact power supply device (10) for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with The control unit is Based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the power transmitting unit group that satisfies a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; The control unit is power is supplied to the power receiving unit by controlling the impedance of the power transmitting circuit having the power transmitting coil facing the power receiving coil to be smaller than the impedance of the power transmitting circuit having the power transmitting coil not facing the power receiving coil; The impedance of the power transmission circuit having the power transmission coil not facing the power receiving coil is controlled to be larger than the impedance of the power transmission circuit having the power transmission coil facing the power receiving coil, thereby stopping the supply of power to the power receiving unit. Non-contact power supply device.

23. A non-contact power supply device (10) for supplying power to a moving body (200) having a power receiving unit (210) having a power receiving coil (211), a power conversion unit (120) for generating power to be transmitted to the receiving coil; a power transmitting unit group (G1) including one or more power transmitting unit groups, each of which is composed of two or more power transmitting units (110), each of which has a power transmitting circuit including a power transmitting coil (111), and each of which receives power from the power conversion unit and transmits power from the power transmitting coil to the power receiving coil; A control unit (130) that controls the supply of power from the power conversion unit to the power transmission unit group; At least one position detection unit (80) for detecting the position of the moving body; Equipped with the one or more power transmission unit groups are a plurality of power transmission unit groups installed on a passage along which the moving object travels, the power conversion unit is set to supply or stop power for each of the power transmission unit groups; The control unit is Based on position information indicating the position of the moving object detected by the position detection unit, supplying power from the power conversion unit to the group of power transmitting units that satisfy a power transmission condition including that a relative distance of the power transmitting coil with respect to the power receiving coil of the moving body is equal to or less than a predetermined threshold; not supplying power from the power conversion unit to the power transmitting unit group that does not satisfy the power transmission condition; The control unit is Detecting or estimating a destination position of the moving object; Identifying the power transmission unit group installed at the destination; controlling the power conversion unit so as to cause a current to flow into the identified group of power transmission units before the moving object enters an area in which the identified group of power transmission units is installed; Non-contact power supply device.

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