Non-contact power supply system and computer program

Abstract

To restrict the sum of feeding powers of multiple power reception devices from exceeding the possible output power of a power transmission circuit in a non-contact power supply system.SOLUTION: Non-contact power supply systems 1000, 1000A, and 1000B comprise: power transmission circuits 110 and 110A that execute the supply of high-frequency AC power with a predetermined operating frequency after receiving power from a system power supply PS; multiple power transmission devices 120, 120A, and 120B that can conduct non-contact power feeding, while being connected in parallel with each other with respect to the power transmission circuit; multiple power reception devices 200 that receive the non-contact power feeding from the power transmission device when positioned in any of power transmission areas where the respective power transmission devices can perform power transmission; and a feeding power restriction unit 400 that controls each power reception device so that the sum of the feeding powers demanded by the multiple power reception devices does not exceed the possible output power. Each power reception device transmits power reception device-side information to the feeding power restriction unit. The feeding power restriction unit controls each power reception device using the power reception device-side information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a contactless power supply system, a computer program, a power receiving device, and a power transmitting device. [Background technology]

[0002] There is known a power supply system that supplies power to an electric vehicle. When such a power supply system supplies power to a plurality of electric vehicles, it is necessary to supply power so that the power supply does not exceed the output power of the power supply device. The charging system described in Patent Document 1 acquires the remaining charge of the rechargeable battery of each electric vehicle and the destination to which the vehicle will be moved, and determines a charging schedule for the charging device installed in each home, thereby preventing the plurality of charging devices from charging simultaneously and causing the power supply to become excessive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-65265 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a power supply system for an electric vehicle such as an AGV (Automatic Guided Vehicle) that supplies power while traveling in a power supply area, or for fixed equipment that supplies power while in operation, the timing and amount of power supply vary greatly depending on the operating conditions of the electric vehicle or fixed equipment equipped with a power receiving device. Therefore, a method of controlling the charging schedule of a charging device such as the charging system described in Patent Document 1 cannot sufficiently suppress the power supply depending on the operating conditions of the electric vehicle or fixed equipment. [Means for solving the problem]

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

[0006] According to one embodiment of the present disclosure, a contactless power supply system (1000, 1000A, 1000B) is provided. The contactless power supply system includes a power transmission circuit (110, 110A) that receives power from a power grid (PS) and supplies high-frequency AC power at a predetermined operating frequency, a plurality of power transmission devices (120, 120A, 120B) that are connected in parallel to the power transmission circuit and are capable of contactless power supply, a plurality of power receiving devices (200) that receive power contactlessly from the power transmission devices when located anywhere within a power transmission area where power transmission by each of the power transmission devices is possible, and a power supply suppression unit (400) that controls each of the power receiving devices so that the total of the power supply requested by the plurality of power receiving devices does not exceed an outputtable power that is the power that the power grid and the power transmission circuit can continue to supply, and each of the power receiving devices transmits power receiving device side information that is information indicating the operating status of the power receiving device to the power supply power suppression unit, and the power supply power suppression unit controls each of the power receiving devices using the power receiving device side information.

[0007] According to this type of control device, by utilizing information from the power receiving device side, each power receiving device is controlled so that the total power supply requested by multiple power receiving devices does not exceed the available output power, thereby allowing the power supply to be adjusted according to the operating status of each power receiving device. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an explanatory diagram showing a schematic configuration of a contactless power supply system according to a first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram illustrating a circuit configuration of a power transmission circuit according to the first embodiment. [Diagram 3] FIG. 2 is an explanatory diagram showing a circuit configuration of the contactless power supply system according to the first embodiment. [Figure 4] 5 is a flowchart showing a control procedure executed by a power supply suppression unit in the power supply suppression control of the first embodiment. [Diagram 5] 5 is a flowchart showing a control procedure executed by a power receiving device in supply power limiting control according to the first embodiment. [Figure 6] 10 is a flowchart showing a control procedure executed by a power supply suppression unit in the power supply suppression control of the second embodiment. [Figure 7] 13 is a flowchart showing a control procedure executed by a power supply suppression unit in the power supply suppression control of the fourth embodiment. [Figure 8] 13 is a flowchart showing a control procedure executed by a power receiving device in supply power limiting control according to a fifth embodiment. [Figure 9] 13 is a flowchart showing a control procedure executed by a power receiving device in supply power limiting control according to a sixth embodiment. [Figure 10] FIG. 13 is an explanatory diagram illustrating a circuit configuration of a power transmission circuit according to another embodiment. [Figure 11] FIG. 13 is an explanatory diagram showing a circuit configuration of a contactless power supply system according to another embodiment. [Figure 12] FIG. 13 is an explanatory diagram showing a circuit configuration of a contactless power supply system according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A. First embodiment: A-1.Device configuration: The contactless power supply system 1000 of the present embodiment is a system that contactlessly supplies power from a power transmission system 100 to a power receiving device 200 mounted on a moving body such as an AGV (Automatic Guided Vehicle) or a fixed facility such as a conveying articulated robot or a conveyor in a factory or warehouse. In the following description, the power receiving device 200 mounted on a moving body is called a "mobile power receiving device" and the power receiving device 200 mounted on a fixed facility is called a "fixed power receiving device" as necessary. As shown in FIG. 1, the contactless power supply system 1000 includes a power transmission system 100, a power receiving device 200, and a control device 300. In this embodiment, the power transmission system 100 is buried under a floor 105. In FIG. 1, the power receiving device 200 mounted on an electric vehicle 202 as a moving body that travels on the floor 105 is shown as the mobile power receiving device. In Fig. 1, the x-axis direction indicates the traveling direction of the electric vehicle 202, the y-axis direction indicates the width direction of the electric vehicle 202, and the z-axis direction indicates the vertically upward direction. Note that the configuration of the power receiving device 200 as a fixed power receiving device is similar to that of the power receiving device 200 as a mobile power receiving device, and is therefore omitted from Fig. 1. Also, the contactless power supply system 1000 includes a plurality of power receiving devices 200, but since they have the same configuration, they are not shown in Fig. 1.

[0010] The power transmission system 100 includes a power transmission circuit 110 and a plurality of power transmission devices 120. The power transmission circuit 110 receives AC power from a power system PS and converts the AC power into AC power having a predetermined operating frequency. As shown in FIG. 2, the power transmission circuit 110 includes, in order from the side connected to the power system PS, a noise filter 111, a PFC (Power Factor Correction) circuit 112, an inverter 113, and a high-frequency filter 114. In this embodiment, two power transmission circuits 110 are connected in parallel to the power system PS. Only one power transmission circuit 110 may be connected to the power system PS, or three or more power transmission circuits 110 may be connected in parallel to the power system PS.

[0011] The noise filter 111 removes noise from the AC power supplied from the system power supply PS. The PFC circuit 112 is a well-known circuit that eliminates a phase difference between an input voltage and an output current generated by the noise removal in the noise filter 111, suppresses harmonics, and improves the power factor to approach 1. The AC power supplied from the system power supply PS is converted to DC power and smoothed by the noise filter 111 and the PFC circuit 112. The inverter 113 converts the supplied DC power into high-frequency AC power. The high-frequency filter 114 extracts AC power of a predetermined operating frequency from the supplied high-frequency AC power and passes it. The AC power that has passed through the high-frequency filter 114 is supplied to each power transmission device 120 via the AC transmission bus BSac.

[0012] As shown in Fig. 1, a plurality of power transmitting devices 120 are installed in the ground on a floor 105 along the x-axis direction. The power transmitting devices 120 may be installed in a location other than the ground on the floor 105, for example, on the side of a fixed facility. The power transmitting devices 120 are connected in parallel to the power transmitting circuit 110 and are supplied with AC power from the power transmitting circuit 110. Each power transmitting device 120 has a primary side resonant circuit 10. The primary side resonant circuit 10 is supplied with AC power from the power transmitting circuit 110 and transmits the AC power in a non-contact manner to a secondary side resonant circuit 240 described later. A specific configuration of the primary side resonant circuit 10 will be described later.

[0013] When the power receiving device 200 is located in any area (hereinafter also referred to as "power transmission area") predetermined for each power transmitting device 120 and predetermined power supply conditions are satisfied, the power receiving device 200 is supplied with power from the power transmitting device 120. In this embodiment, the power supply conditions for the mobile power receiving device are that the electric vehicle 202 is traveling and that a power supply permission notice described later has been received. "The electric vehicle 202 is traveling" includes a case where the electric vehicle 202 is moving, as well as a case where the electric vehicle 202 is stopped near a fixed facility such as a transport robot or a conveyor for transferring a transported object. In addition, in the fixed power receiving device, the power supply conditions are that the fixed facility is performing a transport operation such as transferring a transported object, and that a power supply permission notice described later has been received. Note that the power supply conditions are not limited to the above, and may be arbitrarily set for each device equipped with the power receiving device 200 so that power is supplied at an appropriate frequency according to the operation performed by each device.

[0014] The power receiving device 200 includes a battery 210, an auxiliary battery 215, a power receiving side control unit 220, a power receiving circuit 230, a secondary side resonant circuit 240, a DC / DC converter circuit 260, an inverter circuit 270, a motor generator 280, and an auxiliary 290. The power receiving device 200 does not need to include the auxiliary 290, and in this case, the auxiliary battery 215 and the DC / DC converter circuit 260 are also not required. In this embodiment, the secondary side resonant circuit 240 is provided at a position facing the floor 105, for example, on the lower surface of the electric vehicle 202. When the power transmitting device 120 is disposed on the side of the fixed equipment, the secondary side resonant circuit 240 may be provided on the side of the electric vehicle 202. A specific configuration of the secondary side resonant circuit 240 will be described later.

[0015] The secondary side resonant circuit 240 is connected to the power receiving circuit 230, and the AC power received by the secondary side resonant circuit 240 is converted to DC power by the power receiving circuit 230. The battery 210, the high voltage side of the DC / DC converter circuit 260, and the inverter circuit 270 are connected to the output of the power receiving circuit 230. The auxiliary battery 215 and the auxiliary 290 are connected to the low voltage side of the DC / DC converter circuit 260. The motor generator 280 is connected to the inverter circuit 270. The DC power output from the power receiving circuit 230 can be used to charge the battery 210 and drive the motor generator 280 via the inverter circuit 270. In addition, the DC power output from the power receiving circuit 230 can also be used to charge the auxiliary battery 215 and drive the auxiliary 290 by lowering the voltage using the DC / DC converter circuit 260.

[0016] The battery 210 is a secondary battery that outputs a relatively high DC power for driving the motor generator 280, for example, a voltage of several tens to several hundreds of volts. The motor generator 280 operates as a three-phase AC motor and generates a driving force for running the electric vehicle 202. The motor generator 280 operates as a generator when the electric vehicle 202 decelerates and regenerates electric power. When the motor generator 280 operates as a motor, the inverter circuit 270 converts the electric power of the battery 210 into three-phase AC and supplies it to the motor generator 280. When the motor generator 280 operates as a generator, the inverter circuit 270 converts the three-phase AC regenerated by the motor generator 280 into DC and supplies it to the battery 210. The battery 210 corresponds to the "load device" in this disclosure.

[0017] The DC / DC converter circuit 260 converts the output of the battery 210 to a voltage lower than the output voltage of the battery 210, for example, 12 V, and supplies the voltage to the auxiliary battery 215 and the auxiliary 290. The auxiliary battery 215 is a secondary battery for driving the auxiliary 290, and has a relatively low voltage. The auxiliary 290 includes peripheral devices of the electric vehicle 202 and various accessories of the electric vehicle 202.

[0018] The power receiving side control unit 220 controls each unit, including the inverter circuit 270, in the electric vehicle 202. When receiving power, the power receiving side control unit 220 controls the power receiving circuit 230 to receive the power.

[0019] The power receiving side control unit 220 is configured to be able to communicate with the control device 300. The power receiving side control unit 220 transmits power receiving device side information indicating the state of the power receiving device 200 to the control device 300, and receives various notifications, which will be described later, transmitted from the control device 300. In this embodiment, the "power receiving device side information" means information including at least one of the location information of the power receiving device 200, information indicating whether the power receiving device 200 is located within a power transmission area, the SOC (States Of Charge) of the battery 210, the remaining power amount of the battery 210, the current power supply, and the current power consumption. These pieces of information are detected by various sensors provided in the power receiving device 200 and transmitted to the power receiving side control unit 220.

[0020] The control device 300 is configured as a computer having a CPU 310, a memory 320, and a communication device 330. The CPU 310 functions as a supply power suppression unit 400 by executing a program stored in the memory 320 in advance.

[0021] The power supply suppression unit 400 controls the power receiving device 200 so that the total of the power supply power requested from the multiple power receiving devices 200 (hereinafter also referred to as "requested power supply") does not exceed the available output power. The "available output power" means the power that the power grid PS and the power transmission circuit 110 can continue to supply. The available output power may be set to a power equal to or less than the rated output power of the power grid PS and the power transmission circuit 110, and may be set to a power larger than the rated output power, for example, a power several kW larger than the rated output power, as long as the power is large enough that the power grid PS and the power transmission circuit 110 do not immediately stop operating. In this embodiment, the available output power of the power transmission circuit 110 is set in advance. Specific control by the power supply suppression unit 400 will be described later.

[0022] A-2.Circuit configuration: As shown in Fig. 3, the power transmitting device 120 has a primary side coil Ls, an impedance variable element 20, a primary side detection circuit 30, and a primary side control circuit 40. Note that, in Fig. 3, of the multiple power transmitting devices 120 connected in parallel to the power transmitting circuit 110, only one power transmitting device 120 is shown, and the other power transmitting devices 120 are not shown.

[0023] The variable impedance element 20 is connected in series with the primary coil Ls between the power transmission circuit 110 and the primary coil Ls, and constitutes the primary resonant circuit 10 together with the primary coil Ls. The variable impedance element 20 includes two capacitors C11 and C12 and a switch SW1. The capacitor C11 and the primary coil Ls are connected in series. The capacitor C12 and the switch SW1 are connected in series, and the capacitor C12 and the switch SW1 connected in series are connected in parallel with the capacitor C11. The switch SW1 may be a mechanical contact such as a relay that switches in response to an external command, but may also be configured to use a semiconductor element such as a MOS-FET or an analog switch. The capacitors C11 and C12 correspond to the "primary capacitor" in this disclosure.

[0024] The impedance variable element 20 changes its capacitance by switching the switch SW1 on and off. When the switch SW1 is on, the capacitor C12 is connected to the primary coil Ls. At this time, the capacitance of the impedance variable element 20 is equal to the sum of the capacitance of the capacitor C11 and the capacitance of the capacitor C12. When the switch SW1 is off, the capacitor C12 is disconnected from the primary coil Ls. At this time, the capacitance of the impedance variable element 20 is equal to the capacitance of the capacitor C11. By changing the capacitance of the impedance variable element 20 in this way, the impedance of the primary resonant circuit 10 when the switch SW1 is on is lower than when the switch SW1 is off. With this change in impedance of the primary resonant circuit 10, the resonant state of the primary resonant circuit 10 also changes. In this embodiment, when the switch SW1 is on, the primary resonant circuit 10 is in a resonant state at the operating frequency and in a power transmission state. When the switch SW1 is off, the primary resonant circuit 10 is in a non-resonant state at the operating frequency and in a standby state. In the standby state, the power transmitting device 120 causes a standby current smaller than the current flowing in the power transmitting state to flow through the primary coil Ls to generate a magnetic flux.

[0025] The primary side detection circuit 30 has a magnetic flux sensor that detects the magnitude of the magnetic flux interlinked with the primary side coil Ls and a current sensor that detects the magnitude of the current flowing through the primary side coil. In this embodiment, the magnetic flux sensor detects the magnitude of the magnetic flux by utilizing a change in voltage applied to a detection coil magnetically coupled to the primary side coil Ls. The current sensor detects the magnitude of the current by utilizing a change in voltage applied to the capacitor C11. The primary side detection circuit 30 outputs a signal indicating the magnitude of the detected magnetic flux and a signal indicating the magnitude of the current to the primary side control circuit 40.

[0026] The primary side control circuit 40 uses a signal output from the primary side detection circuit 30 to drive the switch SW1 to switch the switch SW1 on and off. More specifically, the primary side control circuit 40 turns on the switch SW1 when the magnitude of the magnetic flux indicated by the signal output from the primary side detection circuit 30 is equal to or greater than a preset threshold. The primary side control circuit 40 turns off the switch SW1 when the magnitude of the current indicated by the signal output from the primary side detection circuit 30 is equal to or greater than a threshold. The magnitude of the current and the magnitude of the magnetic flux change according to the degree of magnetic coupling between the power transmitting device 120 and the power receiving device 200. In a non-resonant state, the magnitude of the magnetic flux increases as the power transmitting device 120 and the power receiving device 200 approach each other. In a resonant state, the magnitude of the current decreases as the power transmitting device 120 and the power receiving device 200 approach each other. The threshold values ​​of the magnitude of the magnetic flux and the magnitude of the current are specified and set in advance by performing simulations or the like as values ​​when the power receiving device 200 enters a power transmission area.

[0027] The circuit configuration of the power receiving device 200 will be described. In Fig. 3, the circuit configuration of the power receiving device 200, particularly the circuit configuration related to power supply to the battery 210, is illustrated, and other parts are omitted. As shown in Fig. 3, the secondary side resonant circuit 240 is formed by connecting a secondary side coil Lr and a secondary side capacitor Cr in series. Moreover, the power receiving device 200 includes a secondary side detection circuit 250 in addition to the configuration shown in Fig. 1.

[0028] The secondary side detection circuit 250 has a magnetic flux sensor that detects the magnitude of the magnetic flux interlinked with the secondary side coil Lr. In this embodiment, the magnetic flux sensor detects the magnitude of the magnetic flux by utilizing a change in voltage applied to a detection coil magnetically coupled with the secondary side coil Lr. The secondary side detection circuit 250 outputs a signal indicating the magnitude of the detected magnetic flux to the power receiving side control unit 220.

[0029] The power receiving side control unit 220 determines whether or not the power receiving device 200 is located within the power transmission area by using the magnitude of the magnetic flux indicated by the signal output from the secondary side detection circuit 250. More specifically, the power receiving side control unit 220 determines that the power receiving device 200 is located within the power transmission area when the magnitude of the magnetic flux is equal to or greater than a preset threshold value. The threshold value of the magnitude of the magnetic flux is specified and set in advance by performing a simulation or the like as a value when the power receiving device 200 enters the power transmission area. Note that in a configuration in which the power receiving side control unit 220 does not transmit information indicating whether or not the power receiving device 200 is located within the power transmission area to the control device 300 as power receiving device side information, the power receiving device 200 does not need to include the secondary side detection circuit 250.

[0030] In this embodiment, the power receiving circuit 230 has a rectifier circuit 231 and a DC-DC converter 232. The rectifier circuit 231 is composed of four switching elements Q21-Q24 that configure a bridge circuit, and a smoothing capacitor C22. In this embodiment, the switching elements Q21-Q24 are realized by MOSFETs. The rectifier circuit 231 switches the on / off state of the switching elements Q21-Q24 according to the control of the power receiving side control unit 220, converts the AC power input from the secondary side resonant circuit 240 into DC power, and switches between starting and stopping the supply of the DC power to the battery 210. The DC-DC converter 232 transforms the voltage of the DC power supplied from the rectifier circuit 231 according to the control of the power receiving side control unit 220, and supplies the converted voltage to the battery 210.

[0031] A-3. Power supply suppression control: 4 and 5, each power receiving device 200 in this embodiment transmits the above-mentioned power receiving device side information to the power supply power suppression unit 400, and starts or stops power supply according to various notifications transmitted by the power supply power suppression unit 400. The control realized by the control executed in the power receiving device 200 and the power supply power suppression unit 400 is also called "power supply power suppression control."

[0032] When the control device 300 is started, the power supply power suppression unit 400 starts the control shown in FIG. 4, and repeatedly executes this control while the control device 300 is running. In step S110, the power receiving device 200 to which power supply is permitted (hereinafter also referred to as "power supply permitted power receiving device") is determined using the power receiving device side information received from each power receiving device 200. More specifically, the power supply power suppression unit 400 determines the power supply permitted power receiving device for at least some of the power receiving devices 200 (hereinafter also referred to as "notification target power receiving device"). In this embodiment, the power supply power suppression unit 400 determines the power receiving device 200 located within the power transmission area as the notification target power receiving device among the multiple power receiving devices 200.

[0033] The determination of the power receiving device permitted to supply power will be described in more detail. As described above, the power supply power suppression unit 400 receives, as the power receiving device side information, information including at least one of the position information of the power receiving device 200, information indicating whether the power receiving device 200 is located within the power transmission area, the SOC of the battery 210, the remaining power amount of the battery 210, the current supply power, and the current power consumption from each power receiving device 200. The power supply power suppression unit 400 can specify the power transmitting device 120 to which the power receiving device 200 can be magnetically coupled by using at least one of the position information of each power receiving device 200 and the information indicating whether each power receiving device 200 is located within the power transmission area, and can estimate the required power supply from the number of the power transmitting devices 120 that can be magnetically coupled to the power receiving device 200. The power supply power suppression unit 400 can also estimate the required power supply by each power receiving device 200 by using the SOC or the remaining power amount of the battery 210. The power supply power suppression unit 400 can also estimate the requested power supply by each power receiving device 200 by using the current power supply power or power consumption of the power receiving device 200. In this way, the power supply power suppression unit 400 uses the requested power supply estimated by using the power receiving device side information to determine the power supply permitted receiving device such that the requested power supply does not exceed the available output power of the power transmission circuit 110. For example, the power supply power suppression unit 400 adds up the requested power supply by each power receiving device 200 in the order in which the power receiving device side information is received, and determines each power receiving device 200 associated with the power receiving device side information received until the total of the requested power supply reaches the available output power as the power supply permitted receiving device.

[0034] In step S120, the power supply suppression unit 400 determines whether or not to permit power supply for each power receiving device to be notified. If it is determined that power supply is permitted (step S120: Yes), the power supply suppression unit 400 transmits a power supply permission notification and a power supply notification to the power receiving device to be notified that power supply is permitted (step S130). The "power supply permission notification" refers to a notification notifying the power receiving device 200 that power supply is permitted. The "power supply notification" refers to a notification notifying the power receiving device 200 of the power that can be supplied.

[0035] On the other hand, if it is determined that power supply is not permitted (step S120: No), the power supply suppression unit 400 transmits a power supply non-permission notification to the power receiving device 200 that is not permitted to supply power (step S140). The "power supply non-permission notification" refers to a notification that notifies the power receiving device 200 that power supply is not permitted. The power supply suppression unit 400 repeatedly executes the above-described control.

[0036] When entering the power transmission area, each power receiving device 200 starts the control shown in Fig. 5, and repeatedly executes such control while staying in the power transmission area. As shown in Fig. 5, the power receiving device 200 executes the control of step S210 and the controls of steps S220, S230, S240, and S250 in parallel.

[0037] In step S210, the power receiving side control unit 220 transmits the power receiving device side information to the supplied power suppression unit 400. In this embodiment, the power receiving side control unit 220 repeatedly executes this step every time a preset time has elapsed.

[0038] In step S220, the power receiving side control unit 220 determines whether or not a power supply permission notification and a power supply notification have been received. If it is determined that a power supply permission notification and a power supply notification have not been received (step S220: No), the power receiving side control unit 220 repeats this determination.

[0039] If it is determined that the power supply permission notice and the power supply power notice have been received (step S220: Yes), the power receiving side control unit 220 controls the power receiving circuit 230 to start power supply with the permitted power supply power (step S230). More specifically, the power receiving side control unit 220 controls the rectifier circuit 231 to start power supply, and controls the DC-DC converter 232 to control the power supply supplied to the battery 210.

[0040] In step S240, the power receiving side control unit 220 determines whether or not a power supply non-permission notification has been received. While it is determined that a power supply non-permission notification has not been received (step S240: No), the power receiving side control unit 220 controls the power receiving circuit 230 to continue power supply.

[0041] If it is determined that the power supply non-permission notification has been received (step S240: Yes), the power receiving side control unit 220 controls the power receiving circuit 230 to stop power supply (step S250). More specifically, the power receiving side control unit 220 controls the rectifier circuit 231 to stop power supply. Thereafter, the power receiving side control unit 220 executes step S220 again.

[0042] According to the contactless power supply system 1000 of the first embodiment described above, by utilizing power receiving device side information, each power receiving device 200 is controlled so that the total of the power supply requested by the multiple power receiving devices 200 does not exceed the available output power, so that the power supply can be adjusted according to the operating status of each power receiving device 200.

[0043] Moreover, the contactless power supply system 1000 transmits a power supply permission notice or a power supply non-permission notice to the power receiving device 200, and the power receiving device 200 performs power supply when receiving the power supply permission notice, so that it is possible to selectively supply power to some of the power receiving devices 200, and the power supply can be suppressed. Moreover, the contactless power supply system 1000 transmits a power supply power notice to the power receiving device 200, and the power receiving device 200 performs power supply with the permitted power supply power notified by the power supply power notice, so that it is possible to suppress the power supply power by notifying the permitted power supply power that is suppressed more than usual according to the operation status of the power receiving device 200. In addition, the power supply capacity required for the power transmission circuit 110 can be suppressed compared to a configuration in which power supply is simultaneously performed to all the power receiving devices 200, or a configuration in which power supply is always performed with the maximum power, and the introduction cost of the contactless power supply system 1000 can be suppressed.

[0044] B. Second embodiment: 6, the contactless power supply system 1000 of the second embodiment is different from the contactless power supply system 1000 of the first embodiment in that the supply power suppression unit 400 further executes steps S102, S122, and S132 in the supply power suppression control. Note that the system configuration of the contactless power supply system 1000 of the second embodiment and other steps in the supply power suppression control are the same as those of the contactless power supply system 1000 of the first embodiment, so the same configurations and steps are denoted by the same reference numerals and detailed description thereof will be omitted.

[0045] In this embodiment, each power receiving device 200 transmits, as power receiving device side information, to the power supply power suppression unit 400, information including at least one of the SOC of the battery 210, the remaining power amount of the battery 210, and the current power consumption.

[0046] As shown in FIG. 6, in step S102, the power supply suppression unit 400 uses the power receiving device side information to determine a priority power receiving device. The "priority power receiving device" refers to a power receiving device 200 that is given priority for power supply among a plurality of notification target power receiving devices. The power supply suppression unit 400 may, for example, compare the SOC or remaining power of the battery 210 of each notification target power receiving device, select a preset number of notification target power receiving devices in order of the lowest SOC or remaining power of the battery 210, and determine them as priority power receiving devices. This is because an apparatus equipped with such a power receiving device 200 may not be able to continue operation due to a power shortage, and therefore the need for power supply is high. In addition, the power supply suppression unit 400 may, for example, compare the power consumption of each notification target power receiving device, select a preset number of notification target power receiving devices in order of the highest power consumption, and determine them as priority power receiving devices. This is because an apparatus equipped with such a power receiving device 200 may consume power in a short time and therefore the need for power supply is high.

[0047] In step S110, the supply power suppression unit 400 determines the power supply permission power receiving apparatus so as to transmit the power supply permission notification preferentially to the priority power receiving apparatus.

[0048] If it is determined in step S120 that power supply to the notified power receiving device to be determined is permitted (step S120: Yes), and the notified power receiving device is a priority power receiving device (step S122: Yes), the power supply suppression unit 400 executes the above-mentioned step S130 and then executes step S102 again.

[0049] On the other hand, when it is determined that power supply to the notification target power receiving device to be determined is permitted (step S120: Yes) and the power receiving device 200 is not a priority power receiving device (step S122: No), the power supply suppression unit 400 transmits a power supply permission notification and a power supply notification notifying a power supply power that is suppressed more than the power supply power indicated in the power supply notification transmitted in step S130 (step S132). In other words, the power supply suppression unit 400 notifies the notification target power receiving device, which is a power supply permitted power receiving device but is not a priority power receiving device, of a power supply power that is suppressed more than the power supply power notified to the priority power receiving device. After the end of step S132, the power supply suppression unit 400 executes step S102 again.

[0050] The contactless power supply system 1000 of the second embodiment described above provides the same effects as the contactless power supply system 1000 of the first embodiment. In addition, since a prioritized power receiving device is determined and a power supply permission notification is preferentially transmitted to the prioritized power receiving device, power supply can be preferentially performed to the power receiving device 200 having a high need for power supply, and it is possible to prevent a device equipped with the power receiving device 200 from stopping operation due to being unable to supply power.

[0051] In addition, the power supply suppression unit 400 notifies a notified power receiving device that is not a priority power receiving device of an permitted power supply that is more suppressed than that of a priority power receiving device, even when power supply is permitted, thereby also preventing the total power supply from exceeding the available output power.

[0052] C. Third embodiment: The contactless power supply system 1000 of the third embodiment differs from the contactless power supply system 1000 of the second embodiment in that the method of determining the prioritized power receiving device is different. Note that the system configuration of the contactless power supply system 1000 of the third embodiment and other procedures in the power supply power suppression control are the same as those of the contactless power supply system 1000 of the second embodiment, so the same configurations and procedures are denoted by the same reference numerals and detailed description thereof will be omitted.

[0053] In the above-mentioned step S102, the power supply suppression unit 400 determines the priority power receiving device by giving priority to the mobile power receiving device over the fixed power receiving device. The power supply suppression unit 400 may, for example, compare the SOC or remaining power of the battery 210 of each of the mobile power receiving devices among the notification target power receiving devices, select a preset number of mobile power receiving devices in descending order of the SOC or remaining power of the battery 210, and determine them as the priority power receiving device. The power supply suppression unit 400 may, for example, compare the power consumption of each of the mobile power receiving devices among the notification target power receiving devices, select a preset number of mobile power receiving devices in descending order of the power consumption, and determine them as the priority power receiving device.

[0054] The contactless power supply system 1000 of the third embodiment described above provides the same effects as the contactless power supply system 1000 of the second embodiment. In addition, since a power reception permission notification is preferentially transmitted to a mobile power receiving device, power supply to the mobile power receiving device that has fewer power supply opportunities compared to a fixed power receiving device can be preferentially performed, and it is possible to prevent the mobile power receiving device from stopping its operation due to being unable to supply power.

[0055] D. Fourth embodiment: 7, the non-contact power supply system 1000 of the fourth embodiment is different from the non-contact power supply system 1000 of the first embodiment in that the supply power suppression unit 400 further executes step S104 in the supply power suppression control. Note that the system configuration of the non-contact power supply system 1000 of the fourth embodiment and other steps in the supply power suppression control are the same as those of the non-contact power supply system 1000 of the first embodiment, so the same configurations and steps are denoted by the same reference numerals and detailed description thereof will be omitted.

[0056] In this embodiment, each power receiving device 200 transmits information including at least the SOC of the battery 210 to the supply power suppression unit 400 as the power receiving device side information.

[0057] In step S104, the power supply suppression unit 400 determines the maximum power receiving device by using the power receiving device side information. The "maximum power receiving device" refers to a notification target power receiving device among a plurality of notification target power receiving devices, in which the SOC of the battery 210 is less than a preset threshold value and power supply is possible with the upper limit transmission power of the power transmitting device 120. The supply power is determined according to the SOC of the battery 210, and the lower the SOC, the higher the power supply is possible.

[0058] In step S110, the power supply suppression unit 400 determines only the maximum power receiving device as the power supply permitted receiving device. Note that how many of the multiple maximum power receiving devices are to be determined as the power supply permitted receiving devices may be arbitrarily determined according to the upper limit transmission power of the power transmitting device 120 and the available output power of the power transmitting circuit 110.

[0059] The control from step S120 onwards is the same as in the first embodiment described above. However, since only the maximum power receiving device is designated as the power supply permitted receiving device in step S110, in step S130, a power supply permission notification and a supply power notification are sent only to the maximum power receiving device.

[0060] The contactless power supply system 1000 of the fourth embodiment described above has the same effects as the contactless power supply system 1000 of the first embodiment. In addition, since the power supply permission notification is transmitted only to the maximum power receiving device, it is possible to suppress a decrease in the frequency of power supply by the power transmitting device 120 at the upper limit transmission power, and it is possible to suppress a decrease in power supply efficiency in the contactless power supply system 1000.

[0061] E. Fifth embodiment: The contactless power supply system 1000 of the fifth embodiment is different from the contactless power supply system 1000 of the first embodiment in that the power receiving device 200 further executes step S260 in the supply power suppression control as shown in Fig. 8. Note that the system configuration of the contactless power supply system 1000 of the fifth embodiment and other steps in the supply power suppression control are the same as those of the contactless power supply system 1000 of the first embodiment, so the same configurations and steps are denoted by the same reference numerals and detailed description thereof will be omitted.

[0062] If it is determined in step S220 that the power supply permission notice and the power supply notification have not been received (step S220: No), in other words, if a power supply non-permission notice has been received, the power receiving side control unit 220 causes the electric vehicle 202 to retreat outside the power transmission area (step S260). More specifically, the power receiving side control unit 220 controls the electric vehicle 202 via an ECU (not shown) that is mounted in the electric vehicle 202 and controls the traveling of the electric vehicle 202.

[0063] The contactless power supply system 1000 of the fifth embodiment described above provides the same effects as the contactless power supply system 1000 of the first embodiment. In addition, since the power receiving device 200 that has received the power supply non-permission notification retreats from the power transmission area, it is possible to prevent a decrease in power supply opportunities of a power supply device that is in greater need of power supply, and it is possible to prevent the power receiving device 200 from stopping operation due to being unable to supply power.

[0064] F. Sixth embodiment: 9, the contactless power supply system 1000 of the sixth embodiment is different from the contactless power supply system 1000 of the fifth embodiment in that the power receiving device 200 executes step S262 instead of step S260 in the supply power suppression control and further executes step S222. Note that the system configuration of the contactless power supply system 1000 of the fifth embodiment and other steps in the supply power suppression control are the same as those of the contactless power supply system 1000 of the fifth embodiment, so the same configurations and steps are denoted by the same reference numerals and detailed description thereof will be omitted.

[0065] If it is determined in step S220 that the power supply permission notification and the power supply power notification have not been received (step S220: No), in other words, if a power supply non-permission notification has been received, the power receiving side control unit 220 controls the power receiving circuit 230 to transition the power receiving state of the power receiving device 200 to a non-standby state in which the power receiving device 200 is not waiting for the start of power supply (step S262).

[0066] On the other hand, if it is determined that the power supply permission notification and the power supply notification have been received (step S220: Yes), the power receiving side control unit 220 controls the power receiving circuit 230 to transition the power receiving state of the power receiving device 200 to a standby state in which power supply is executable.

[0067] According to the contactless power supply system 1000 of the sixth embodiment described above, the same effects as those of the contactless power supply system 1000 of the first embodiment are achieved. In addition, since the power receiving device 200 that has received the power supply non-permission notification transitions from a standby state to a non-standby state, it is possible to suppress power consumption for maintaining the standby state. This suppresses power consumption of the battery 210, thereby suppressing the frequency of power supply, and further suppresses the total power supply from exceeding the available output power.

[0068] G. Other embodiments: (G1) In the above embodiment, the power receiving device 200 is mounted on a moving body or a fixed facility, but the present disclosure is not limited thereto. The power receiving device 200 may be mounted only on a moving body. The contactless power supply system 1000 of this form also provides the same effects as the above embodiment.

[0069] (G2) In the above embodiment, each power receiving device 200 transmits the power receiving device side information to the power supply power suppression unit 400 every time a predetermined time has elapsed, but the present disclosure is not limited thereto. For example, the power supply power suppression unit 400 may transmit a notification to all the power receiving devices 200 at any timing requesting the transmission of the power receiving device side information, and among the power receiving devices 200 that have received such a notification, only the power receiving devices 200 located within the power transmission area may transmit the power receiving device side information to the power supply power suppression unit 400. The contactless power supply system 1000 of this form also achieves the same effects as the above embodiment. In addition, the power receiving devices 200 that are not located within the power transmission area do not need to transmit the power receiving device side information, so that the power consumption for transmitting information can be suppressed.

[0070] (G3) In the above embodiment, the power supply power suppression unit 400 sets the power receiving device 200 located within the power transmission area as the notification target power receiving device among the multiple power receiving devices 200, but the present disclosure is not limited thereto. The notification target power receiving device may also include the power receiving device 200 located outside the power transmission area. For example, when the notification target power receiving device is located outside the power transmission area, the power supply power suppression unit 400 may transmit a power supply non-permission notification to the notification target power receiving device. In addition, when the requested power supply by each power receiving device 200 located within the power transmission area falls below the available output power and there is a margin for power supply to the other power receiving devices 200, the power supply power suppression unit 400 may transmit a power supply permission notification and a power supply notification to the power receiving device 200 located outside the power transmission area. The contactless power supply system 1000 of this form also achieves the same effects as the above embodiment.

[0071] (G4) In the above embodiment, the power supply suppression unit 400 transmits a power supply permission notification and a power supply notification to the power supply permission receiving device, but the present disclosure is not limited to this. The power supply suppression unit 400 may transmit only a power supply permission notification to the power supply permission receiving device, and the power supply permission receiving device that receives the power supply permission notification may supply power with a preset power supply. The wireless power supply system 1000 of this form also provides the same effects as the above embodiment.

[0072] (G5) In the above embodiment, the power transmission system 100 has a plurality of power transmission circuits 110 connected in parallel to the power grid PS, and each power transmission circuit 110 has a noise filter 111, a PFC circuit 112, an inverter 113, and a high-frequency filter 114, but the present disclosure is not limited thereto. As shown in FIG. 10, the power transmission system 100A may include a power transmission circuit 110A having one DC power circuit 116 connected to the power grid PS and a plurality of AC power circuits 118 connected in parallel to the DC power circuit 116, instead of the power transmission circuit 110. The DC power circuit 116 has a noise filter 111 and a PFC circuit 112, and converts AC power supplied from the power grid PS into DC power, smoothes it, and outputs it. The DC power output from the DC power circuit 116 is supplied to each AC power circuit 118 via a DC transmission bus BSdc. The AC power circuit 118 has an inverter 113 and a high-frequency filter 114, and converts the DC power supplied from the DC power circuit 116 into high-frequency AC power and outputs it. The high-frequency AC power output from the AC power circuit 118 is supplied to each power transmitting device 120 via the AC power transmission bus BSac. Only one AC power circuit 118 may be connected to the DC power circuit 116, or three or more AC power circuits 118 may be connected in parallel to each other. According to the contactless power supply system 1000 including the power transmission system 100A of this configuration, the length of the AC power transmission bus BSac, which is more expensive than the DC power transmission bus BSdc, can be shortened by installing the AC power circuit 118 near the power transmitting device 120, so that the introduction cost of the contactless power supply system 1000 can be suppressed.

[0073] (G6) In the above embodiment, the power transmitting device 120 has the impedance variable element 20, but the present disclosure is not limited thereto. As shown in FIG. 11, the power transmitting device may be configured as a power transmitting device 120A having an impedance variable element 20A instead of the impedance variable element 20. The impedance variable element 20A configures a primary side resonant circuit 10A together with a primary side coil Ls. The impedance variable element 20A has a capacitor C13 and a switch SW2 connected in parallel to the primary side coil Ls, and a switch SW3 connected in series to the primary side coil Ls between the power transmitting circuit 110 and the switch SW2. In the impedance variable element 20A configured in this manner, the primary side detection circuit 30 can also switch the resonant state of the primary side resonant circuit 10A by switching on and off the switches SW2 and SW3. The contactless power supply system 1000A including the power transmitting system 100A having such a power transmitting device 120A also provides the same effects as those of the above embodiment.

[0074] Also, as shown in FIG. 12, the power transmitting device may be configured as a power transmitting device 120B including a tertiary side resonant circuit 13 in addition to the configuration of the power transmitting device 120. The tertiary side resonant circuit 13 is a closed circuit having a tertiary side coil Ls31, a switch SW4, a capacitor C31, and a capacitor C32. The switch SW4 and the capacitor C31 are connected in series to each other, and the tertiary side coil Ls31, the capacitor C32, and the switch SW4 and the capacitor C31 connected in series to each other are connected in parallel to each other. The tertiary side resonant circuit 13 is arranged so that the tertiary side coil Ls31 is magnetically coupled to the primary side coil Ls of the primary side resonant circuit 10 and the secondary side coil Lr of the secondary side resonant circuit 240. In the power transmitting device 120B configured in this manner, the primary side detection circuit 30 switches the switches SW1 and SW4 on and off to switch the resonant states of the primary side resonant circuit 10A and the tertiary side resonant circuit 13. The contactless power supply system 1000B including the power transmission system 100B having the power transmitting device 120B can achieve the same effects as those of the above-described embodiment. Note that the contactless power supply system including a tertiary-side resonant circuit having no capacitor C31 instead of the tertiary-side resonant circuit 13 can achieve the same effects.

[0075] (G7) In the above embodiment, the power supply suppression unit 400 controls the power receiving device 200 using a preset available output power so that the total of the power supply power does not exceed the available output power, but the present disclosure is not limited to this. The power supply suppression unit 400 may obtain information indicating the current available output power of the power system PS and each power transmission circuit 110 from each of the power system PS and each power transmission circuit 110, and control the power receiving device 200 using such information. According to the power supply suppression unit 400 configured as above, even if the available output power of the power system PS and each power transmission circuit 110 varies depending on the supply power of another power system used in, for example, a factory or warehouse, the power receiving device 200 can be controlled so that the total of the power supply power does not exceed the current available output power.

[0076] (G8) In the second embodiment, the power supply suppression unit 400 suppresses the power supply to the power receiving device to be notified other than the priority power receiving device and supplies power, but the present disclosure is not limited to this. The power supply suppression unit 400 may supply power only to the priority power receiving device. The contactless power supply system 1000 of this form can also supply power preferentially to the power receiving device 200 that is highly necessary for power supply, and can suppress the device equipped with the power receiving device 200 from stopping operation due to being unable to supply power.

[0077] The power supply suppression unit 400 and the method described in the present disclosure may be realized by a dedicated computer provided by configuring a processor and a memory programmed to execute one or more functions embodied in a computer program. Alternatively, the control unit and the method described in the present disclosure may be realized by a dedicated computer provided by configuring a processor with one or more dedicated hardware logic circuits. Alternatively, the power supply suppression unit 400 and the method described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor and a memory programmed to execute one or more functions and a processor configured with one or more hardware logic circuits. In addition, the computer program may be stored in a computer-readable non-transitory tangible recording medium as instructions executed by a computer.

[0078] 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 each embodiment corresponding to the technical features in the form described in the Summary of the Invention column can be appropriately replaced or combined in order 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. (Form 1) A non-contact power supply system (1000, 1000A, 1000B), A power transmission circuit (110, 110A) that receives power from a system power supply (PS) and supplies high-frequency AC power at a predetermined operating frequency; A plurality of power transmission devices (120, 120A, 120B) connected in parallel to the power transmission circuit and capable of contactless power supply; a plurality of power receiving devices (200) that receive power from the power transmitting devices in a non-contact manner when the power receiving devices are located in any of the power transmitting areas in which power transmission by the power transmitting devices can be performed; a power supply suppression unit (400) that controls each of the power receiving devices so that a total of power supply requested from the plurality of power receiving devices does not exceed an outputtable power that is the power that the system power supply and the power transmission circuit can continue to supply; Equipped with Each of the power receiving devices transmits power receiving device side information, which is information indicating an operation status of the power receiving device, to the power supply power suppression unit; The power supply suppression unit controls each of the power receiving devices by using the power receiving device side information. Contactless power supply system. (Form 2) The wireless power supply system according to aspect 1, Each of the plurality of power transmitting devices includes a primary-side resonant circuit (10, 10A) having a primary-side coil (Ls) and a primary-side capacitor (C11, C12, C13), Each of the plurality of power receiving devices is a secondary resonant circuit (240) having a secondary coil (Lr) magnetically coupled to the primary coil and a secondary capacitor (Cr); a power receiving circuit (230) that rectifies the AC power output from the secondary resonant circuit and converts it into DC power; A power receiving side control unit (220) for controlling the power receiving circuit; A load device (210) to which the DC power is supplied; Equipped with Contactless power supply system. (Form 3) The wireless power supply system according to aspect 1 or 2, Each of the power receiving devices has a battery (210), and transmits, as the power receiving device side information, information including at least one of location information of the power receiving device, information indicating whether the power receiving device is located within the power transmission area, a SOC of the battery, a remaining power amount of the battery, a current power supply, and a current power consumption to the power supply power suppression unit; The power supply power suppression unit uses the power receiving device side information to perform the following for each of the notification target power receiving devices, which are at least a part of the power receiving devices among the plurality of power receiving devices: Transmitting a power supply permission notification notifying that power supply is permitted or a power supply non-permission notification notifying that power supply is not permitted; Transmitting a supply power notification notifying permitted supply power which is power that can be supplied; Execute at least one of the following: The notification target power receiving device, When a predetermined power supply condition including at least the fact that the power supply permission notification has been received is satisfied, the power supply is started or continued, and when the power supply non-permission notification has been received, the power supply is put on hold or stopped; When the power supply notification is received, power is supplied at the permitted power supply power notified. Contactless power supply system. (Form 4) The wireless power supply system according to aspect 3, the power supply condition further includes a condition that a predetermined operation for each of the power receiving devices is being executed. Contactless power supply system. (Form 5) The wireless power supply system according to aspect 3 or 4, Each of the power receiving devices transmits, as the power receiving device side information, information including at least one of a SOC of the battery, a remaining power amount of the battery, and a current power consumption to the power supply power suppression unit; the power supply power suppression unit uses the power receiving device side information to determine a priority power receiving device, which is the notification target power receiving device to which power supply is preferentially permitted, from among the plurality of notification target power receiving devices, and transmits the power supply permission notification to the priority power receiving device with priority. Contactless power supply system. (Form 6) The wireless power supply system according to any one of aspects 3 to 5, Each of the power receiving devices transmits, as the power receiving device side information, information including at least one of a SOC of the battery, a remaining power amount of the battery, and a current power consumption to the power supply power suppression unit; the power supply suppression unit uses the power receiving device side information to determine a priority power receiving device, which is the notification target power receiving device to which power supply is preferentially permitted, from among the plurality of notification target power receiving devices, and transmits the power supply notification to the notification target power receiving device, which is not the priority power receiving device, from among the plurality of notification target power receiving devices, notifying the notification target power receiving device of the permitted power supply power that is suppressed more than the permitted power supply power notified to the priority power receiving device. Contactless power supply system. (Form 7) The wireless power supply system according to aspect 3 or 4, Each of the power receiving devices transmits information including at least a SOC of the battery to the power supply power suppression unit as the power receiving device side information; the power supply power suppression unit uses the power receiving device side information to determine a maximum power receiving device that is a notification target power receiving device that is capable of supplying power at the upper limit transmission power of the power transmitting device, among the plurality of notification target power receiving devices, and notifies the power supply permission notification only to the maximum power receiving device. Contactless power supply system. (Form 8) The wireless power supply system according to any one of aspects 3 to 7, Among the notification target power receiving devices, the notification target power receiving device that has received the power supply non-permission notification transitions from a standby state in which power supply can be immediately executed to a non-standby state in which power supply is not immediately started. Contactless power supply system. (Form 9) The wireless power supply system according to any one of aspects 3 to 8, At least a portion of the plurality of power receiving devices is a mobile power receiving device mounted on a mobile body (202), When the notification target power receiving device, which is the mobile power receiving device among the plurality of notification target power receiving devices, receives the power supply non-permission notification, the notification target power receiving device retreats from the power transmission area. Contactless power supply system. (Form 10) A wireless power supply system according to any one of aspects 3 to 9, the plurality of power receiving devices include fixed power receiving devices that are mounted on fixed facilities that are fixedly installed in the power transmission area, and mobile power receiving devices that are mounted on mobile bodies, the power supply suppression unit transmits the power supply permission notification to the mobile power receiving device preferentially when the mobile power receiving device is located within the power transmission area; Contactless power supply system. (Form 11) A wireless power supply system according to any one of aspects 1 to 10, The power transmission circuit includes: a DC power circuit (116) for converting AC power supplied from the system power supply into DC power; a DC transmission bus (BSdc) connected to the DC power circuit and supplied with DC power from the DC power circuit; an AC power circuit (118) connected to the DC transmission bus and configured to convert DC power supplied from the DC transmission bus into the high-frequency AC power; an AC transmission bus (BSac) connected to the AC power circuit and receiving the high frequency AC power from the AC power circuit; Equipped with the plurality of power transmission devices are connected in parallel to the AC power circuit via the AC power transmission bus; Contactless power supply system. (Form 12) A computer program for controlling a wireless power supply system, The wireless power supply system includes: A power transmission circuit that receives power from a system power supply and supplies high frequency AC power at a predetermined operating frequency; A plurality of power transmission devices connected in parallel to the power transmission circuit and capable of contactless power supply; a plurality of power receiving devices that receive power from the power transmitting devices in a wireless manner when the power receiving devices are located in any of power transmission areas in which power transmission by the power transmitting devices can be performed; Equipped with The computer program causes a computer to realize a function of controlling each of the power receiving devices by using power receiving device side information, which is information indicating an operating status of each of the power receiving devices, so that a total of power supply requested from the plurality of power receiving devices does not exceed an available output power, which is the power that the system power supply and the power transmission circuit can continue to supply. Computer program. (Form 13) A power receiving device that receives power in a non-contact manner from at least a part of a plurality of power transmitting devices, the plurality of power transmission devices are connected in parallel to a power transmission circuit that receives power from a power grid and supplies high-frequency AC power at a predetermined operating frequency, and are capable of contactless power supply; The power receiving device receives power so that a total of power supply requests from a plurality of power receiving devices including the power receiving device does not exceed an available output power, which is power that the system power supply and the power transmitting circuit can continue to supply. Powered device. (Form 14) A power transmitting device that wirelessly supplies power to a power receiving device, a power transmission circuit that receives power from a power grid and supplies high-frequency AC power at a predetermined operating frequency, the power transmission circuit being connected in parallel with other power transmission devices; The power receiving device receives power so that a total of power supply requests from a plurality of power receiving devices including the power receiving device does not exceed an available output power, which is power that the system power supply and the power transmitting circuit can continue to supply. Power transmission equipment. [Explanation of symbols]

[0079] 110, 110A... power transmission circuit, 120, 120A, 120B... power transmission device, 200... power receiving device, 400... power supply suppression unit, 1000, 1000A, 1000B... non-contact power supply system, PS... system power supply

Claims

1. A non-contact power supply system (1000, 1000A, 1000B), comprising: A power transmission circuit (110, 110A) that is supplied with power from a system power supply (PS) and executes the supply of high-frequency AC power at a predetermined operating frequency; At least one or more power transmission devices (120, 120A, 120B) connected to the power transmission circuit and capable of non-contact power supply; A plurality of power reception devices (200) that receive non-contact power supply from the power transmission device when located anywhere within a power transmission area where power transmission by each power transmission device can be executed; A power supply power suppression unit (400) that controls each power reception device so that the total power supply power required by the plurality of power reception devices does not exceed the outputtable power, which is the power with which the system power supply and the power transmission circuit can continue power supply; Comprising: Each power reception device transmits power reception device side information, which is information indicating the operating status of the power reception device, to the power supply power suppression unit; The power supply power suppression unit controls each power reception device using the power reception device side information; Each power reception device has a battery (210), and as the power reception device side information, transmits information including at least any one of the position information of the power reception device, information indicating whether the power reception device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption, to the power supply power suppression unit; The power supply power suppression unit uses the power reception device side information to, for each of the notification target power reception devices, which are at least some of the plurality of power reception devices, Transmit a power supply permission notification notifying permission to supply power or a power supply non-permission notification notifying non-permission to supply power; Transmit a power supply power notification notifying the permitted power supply power, which is the power that can be supplied; Execute at least any one of the above; The notification target power reception device: Starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, and waits or stops power supply when receiving the power supply non-permission notification; When receiving the power supply power notification, performs power supply with the permitted power supply power notified; Each power reception device transmits information including at least any one of the SOC of the battery, the remaining power amount of the battery, and the current power consumption, as the power reception device side information, to the power supply power suppression unit; The power supply power suppression unit determines, using the power receiving device side information, a priority power receiving device, which is a power receiving device among the plurality of power receiving devices to which power supply is preferentially permitted, and preferentially transmits the power supply permission notification to the priority power receiving device. Non-contact power supply system.

2. A non-contact power supply system (1000, 1000A, 1000B), comprising: A power transmission circuit (110, 110A) that is supplied with power from a system power supply (PS) and executes supply of high-frequency AC power having a predetermined operating frequency; At least one or more power transmission devices (120, 120A, 120B) connected to the power transmission circuit and capable of non-contact power supply; A plurality of power receiving devices (200) that receive non-contact power supply from the power transmission device when located at any position within a power transmission area where power transmission by each power transmission device can be executed; A power supply power suppression unit (400) that controls each of the power receiving devices so that the total power supply power required by the plurality of power receiving devices does not exceed the outputtable power, which is the power with which the system power supply and the power transmission circuit can continue power supply; Comprising: Each of the power receiving devices transmits power receiving device side information, which is information indicating the operating status of the power receiving device, to the power supply power suppression unit; The power supply power suppression unit controls each of the power receiving devices using the power receiving device side information; Each of the power receiving devices has a battery (210), and as the power receiving device side information, includes at least any one of position information of the power receiving device, information indicating whether the power receiving device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption, and transmits the information to the power supply power suppression unit; The power supply power suppression unit uses the power receiving device side information to Transmit a power supply permission notification for notifying permission to supply power or a power supply non-permission notification for notifying non-permission to supply power to each of the notification target power receiving devices, which are at least some of the plurality of power receiving devices; Transmit a power supply power notification for notifying the permission power supply power, which is the power that can be supplied; Execute at least one of the above; The notification target power receiving device Starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, and waits or stops power supply when receiving the power supply non-permission notification. When receiving the power supply power notification, power supply is performed with the permitted power supply power notified, Each of the power receiving devices transmits information including at least any one of the SOC of the battery, the remaining power amount of the battery, and the current power consumption as the power receiving device side information to the power supply power suppression unit, The power supply power suppression unit uses the power receiving device side information to determine a priority power receiving device that is a power receiving device to which power supply is preferentially permitted among the plurality of power receiving devices to be notified, and for the power receiving devices to be notified that are not the priority power receiving devices among the plurality of power receiving devices to be notified, transmits the power supply power notification for notifying the permitted power supply power suppressed compared to the permitted power supply power notified to the priority power receiving device, Contactless power supply system.

3. A contactless power supply system (1000, 1000A, 1000B), A power transmission circuit (110, 110A) that is supplied with power from a system power supply (PS) and executes supply of high-frequency AC power with a predetermined operating frequency, At least one or more power transmission devices (120, 120A, 120B) connected to the power transmission circuit and capable of contactless power supply, A plurality of power receiving devices (200) that receive power contactlessly from the power transmission device when located anywhere within a power transmission area where power transmission by each power transmission device can be executed, A power supply power suppression unit (400) that controls each of the power receiving devices so that the total power supply power required from the plurality of power receiving devices does not exceed the outputtable power which is the power with which the system power supply and the power transmission circuit can continue power supply, Comprising, Each of the power receiving devices transmits power receiving device side information which is information indicating the operating status of the power receiving device to the power supply power suppression unit, The power supply power suppression unit controls each of the power receiving devices using the power receiving device side information, Each of the power receiving devices has a battery (210), and as the power receiving device side information, transmits information including at least any one of the position information of the power receiving device, information indicating whether the power receiving device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption to the power supply power suppression unit, The power supply power suppression unit uses the power receiving device side information for each of the power receiving devices to be notified which are at least a part of the plurality of power receiving devices, Sending a power supply permission notice notifying permission to supply power or a power supply non - permission notice notifying non - permission to supply power, Sending a power supply power notice notifying the permitted power supply power that is power available for power supply, performing at least one of the above, The notified power receiving device, starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notice is satisfied, and waits or stops power supply when receiving the power supply non - permission notice, performs power supply with the notified permitted power supply power when receiving the power supply power notice, Each of the power receiving devices transmits information including at least the SOC of the battery to the power supply power suppression unit as the power receiving device - side information, The power supply power suppression unit uses the power receiving device - side information to determine the maximum power receiving device among the plurality of notified power receiving devices that can perform power supply with the upper limit power supply power of the power transmission device, and notifies the power supply permission notice only to the maximum power receiving device, A non - contact power supply system.

4. A non - contact power supply system (1000, 1000A, 1000B) comprising: A power transmission circuit (110, 110A) that is supplied with power from a system power source (PS) and supplies high - frequency alternating current power at a predetermined operating frequency, At least one or more power transmission devices (120, 120A, 120B) connected to the power transmission circuit and capable of non - contact power supply, A plurality of power receiving devices (200) that receive non - contact power supply from the power transmission device when located anywhere within a power transmission area where power transmission by each power transmission device can be performed, A power supply power suppression unit (400) that controls each of the power receiving devices so that the total power supply power required from the plurality of power receiving devices does not exceed the output - able power, which is the power with which the system power source and the power transmission circuit can continue power supply, comprising, Each of the power receiving devices transmits power receiving device - side information, which is information indicating the operating status of the power receiving device, to the power supply power suppression unit, The power supply power suppression unit controls each of the power receiving devices using the power receiving device - side information, Each of the power receiving devices has a battery (210), and as the power receiving device side information, at least any one of the position information of the power receiving device, information indicating whether the power receiving device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption is included in the information and transmitted to the power supply power suppression unit. The power supply power suppression unit uses the power receiving device side information to, for each of the notification target power receiving devices that are at least some of the plurality of power receiving devices, transmit a power supply permission notification notifying permission of power supply or a power supply non - permission notification notifying non - permission of power supply, transmit a power supply power notification notifying the permitted power supply power that is the power that can be supplied, and execute at least any one of them. The notification target power receiving device starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, waits or stops power supply when receiving the power supply non - permission notification, and performs power supply with the permitted power supply power notified when receiving the power supply power notification. The plurality of power receiving devices include a fixed power receiving device that is a power receiving device mounted on a fixed facility fixedly installed in the power transmission area and a mobile power receiving device that is a power receiving device mounted on a moving body. When the mobile power receiving device is located within the power transmission area, the power supply power suppression unit preferentially transmits the power supply permission notification to the mobile power receiving device. Non - contact power supply system.

5. A non - contact power supply system (1000, 1000A, 1000B), comprising: a power transmission circuit (110, 110A) that is supplied with power from a system power supply (PS) and executes supply of high - frequency alternating current power with a predetermined operating frequency; at least one or more power transmission devices (120, 120A, 120B) connected to the power transmission circuit and capable of non - contact power supply; a plurality of power receiving devices (200) that receive non - contact power supply from the power transmission device when located anywhere within a power transmission area where power transmission by each power transmission device can be executed; a power supply power suppression unit (400) that controls each of the power receiving devices so that the total power supply power required from the plurality of power receiving devices does not exceed the output - able power that is the power with which the system power supply and the power transmission circuit can continue power supply; and is provided with. Each of the power receiving devices transmits power receiving device side information, which is information indicating the operating status of the power receiving device, to the power supply power suppression unit. The power supply power suppression unit controls each of the power receiving devices using the power receiving device side information. The power transmission circuit includes a DC power circuit (116) that converts AC power supplied from the system power supply into DC power, a DC power transmission bus (BSdc) connected to the DC power circuit and supplied with DC power from the DC power circuit, an AC power circuit (118) connected to the DC power transmission bus and converting the DC power supplied from the DC power transmission bus into the high-frequency AC power, and an AC power transmission bus (BSac) connected to the AC power circuit and supplied with the high-frequency AC power from the AC power circuit. The power transmission circuit is provided with at least one or more power transmission devices connected to the AC power circuit via the AC power transmission bus. Non-contact power supply system.

6. A computer program for controlling a non-contact power supply system, wherein the non-contact power supply system includes a power transmission circuit that is supplied with power from a system power supply and executes supply of high-frequency AC power at a predetermined operating frequency, at least one or more power transmission devices connected to the power transmission circuit and capable of non-contact power supply, and a plurality of power receiving devices that receive non-contact power supply from the power transmission devices when located in any of the power transmission areas where power transmission by each of the power transmission devices can be executed. The non-contact power supply system is provided with The computer program causes a computer to realize a power suppression function of controlling each of the power receiving devices so that the total power supply power required from the plurality of power receiving devices does not exceed the outputtable power, which is the power with which the system power supply and the power transmission circuit can continue power supply, using the power receiving device side information, which is information indicating the operating status of each of the power receiving devices. Each of the power receiving devices transmits the power receiving device side information. The power suppression function includes a function of controlling each of the power receiving devices using the power receiving device side information. Each of the power receiving devices has a battery, and as the power receiving device side information, transmits information including at least any one of the position information of the power receiving device, information indicating whether the power receiving device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption. The computer program further Using the power receiving device side information, for each of the notification target power receiving devices that are at least some of the plurality of power receiving devices, a function of transmitting a power supply permission notification notifying permission of power supply or a power supply non - permission notification notifying non - permission of power supply; a function of transmitting a power supply power notification notifying the permitted power supply power that is the power that can be supplied; causing at least one of the above to be realized by the computer, The notification target power receiving device, when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, starts or continues power supply, and when receiving the power supply non - permission notification, waits or stops power supply; when receiving the power supply power notification, performs power supply with the notified permitted power supply power; Each of the power receiving devices transmits information including at least any one of the SOC of the battery, the remaining power amount of the battery, and the current power consumption as the power receiving device side information. The computer program further uses the power receiving device side information to determine a priority power receiving device that is a notification target power receiving device that preferentially permits power supply among the plurality of notification target power receiving devices, and causes the computer to realize a function of preferentially transmitting the power supply permission notification to the priority power receiving device. Computer program.

7. A computer program for controlling a non - contact power supply system, The non - contact power supply system, a power transmission circuit that is supplied with power from a system power source and executes supply of high - frequency AC power of a predetermined operating frequency; at least one or more power transmission devices connected to the power transmission circuit and capable of non - contact power supply; a plurality of power receiving devices that receive non - contact power supply from the power transmission device when located anywhere within a power transmission area where power transmission by each power transmission device can be executed; comprises The computer program uses the power receiving device side information, which is information indicating the operating status of each power receiving device, to control each power receiving device so that the total power supply power required from the plurality of power receiving devices does not exceed the output - able power, which is the power that the system power source and the power transmission circuit can continue to supply power. Each of the power receiving devices transmits the power receiving device side information. The power suppression function includes a function of controlling each power receiving device using the power receiving device side information. Each of the power receiving devices has a battery, and as the power receiving device side information, transmits information including at least any one of the position information of the power receiving device, information indicating whether the power receiving device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption. The computer program further uses the power receiving device side information to, for each of at least some of the plurality of power receiving devices that are the notification target power receiving devices, has a function of transmitting a power supply permission notification notifying permission of power supply or a power supply non - permission notification notifying non - permission of power supply; has a function of transmitting a power supply power notification notifying the permitted power supply power that is the power that can be supplied; causes the computer to implement at least one of them, When the notification target power receiving device starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, and waits or stops power supply when receiving the power supply non - permission notification; when receiving the power supply power notification, performs power supply with the permitted power supply power notified; Each of the power receiving devices transmits information including at least any one of the SOC of the battery, the remaining power amount of the battery, and the current power consumption as the power receiving device side information. The computer program further uses the power receiving device side information to determine a priority power receiving device that is a notification target power receiving device that preferentially permits power supply among a plurality of the notification target power receiving devices, and for a notification target power receiving device that is not the priority power receiving device among the plurality of notification target power receiving devices, causes the computer to implement a function of transmitting the power supply power notification notifying the permitted power supply power suppressed compared to the permitted power supply power notified to the priority power receiving device. Computer program. **Claim 8**: A computer program for controlling a non - contact power supply system, The non - contact power supply system includes a power transmission circuit that is supplied with power from a system power supply and executes supply of high - frequency AC power at a predetermined operating frequency; at least one or more power transmission devices connected to the power transmission circuit and capable of non - contact power supply; a plurality of power receiving devices that receive non - contact power supply from the power transmission device when located anywhere within a power transmission area where power transmission by each of the power transmission devices can be executed; and is provided with. The computer program causes a computer to implement a power suppression function that controls each of the power receiving devices so that the total power supply requested from the plurality of power receiving devices does not exceed the outputtable power, which is the power with which the system power supply and the power transmission circuit can continue power supply, by using power receiving device side information that is information indicating the operating status of each of the power receiving devices. Each of the power receiving devices transmits the power receiving device side information. The power suppression function includes a function of controlling each of the power receiving devices by using the power receiving device side information. Each of the power receiving devices has a battery, and as the power receiving device side information, transmits information including at least any one of the position information of the power receiving device, information indicating whether or not the power receiving device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply, and the current power consumption. The computer program further uses the power receiving device side information to transmit to each of the notification target power receiving devices, which are at least some of the plurality of power receiving devices, a power supply permission notification for notifying permission to supply power or a power supply non - permission notification for notifying non - permission to supply power, and a power supply power notification for notifying the permission power supply power, which is the power that can be supplied, and causes the computer to implement at least one of them. The notification target power receiving device starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, and waits or stops power supply when receiving the power supply non - permission notification. When receiving the power supply power notification, it supplies power with the notified permission power supply power. Each of the power receiving devices transmits information including at least the SOC of the battery as the power receiving device side information. The computer program further uses the power receiving device side information to determine a maximum power receiving device, which is a notification target power receiving device among the plurality of notification target power receiving devices and can execute power supply with the upper limit power transmission power of the power transmission device, and causes the computer to implement a function of notifying the power supply permission notification only to the maximum power receiving device. Computer program. **Claim 9**: A computer program for controlling a non - contact power supply system, wherein the non - contact power supply system A power transmission circuit that is supplied with power from a system power supply and executes the supply of high-frequency AC power at a predetermined operating frequency, At least one or more power transmission devices connected to the power transmission circuit and capable of non-contact power supply, A plurality of power reception devices that receive non-contact power supply from the power transmission device when located at any position within a power transmission area where power transmission by each power transmission device can be executed, Comprising, The computer program causes a computer to realize a power suppression function that controls each of the plurality of power reception devices so that the total power supply required from the plurality of power reception devices does not exceed the outputtable power, which is the power with which the system power supply and the power transmission circuit can continue power supply, by using power reception device side information, which is information indicating the operating status of each power reception device, Each of the power reception devices transmits the power reception device side information, The power suppression function includes a function of controlling each of the power reception devices by using the power reception device side information, Each of the power reception devices has a battery, and as the power reception device side information, transmits information including at least any one of the position information of the power reception device, information indicating whether the power reception device is located within the power transmission area, the SOC of the battery, the remaining power amount of the battery, the current power supply power, and the current power consumption, The computer program further, By using the power reception device side information, for each of the notification target power reception devices, which are at least some of the plurality of power reception devices, A function of transmitting a power supply permission notification for notifying permission to supply power or a power supply non-permission notification for notifying non-permission to supply power, A function of transmitting a power supply power notification for notifying the permitted power supply power, which is the power that can be supplied, Causes the computer to realize at least any one of, The notification target power reception device, Starts or continues power supply when a predetermined power supply condition including at least receiving the power supply permission notification is satisfied, and waits or stops power supply when receiving the power supply non-permission notification, When receiving the power supply power notification, performs power supply with the permitted power supply power notified, The plurality of power reception devices include a fixed power reception device that is a power reception device mounted on a fixed facility fixedly installed in the power transmission area and a mobile power reception device that is a power reception device mounted on a moving body. When the mobile power receiving device is located within the power transmission area, the computer program further causes the computer to implement a function of preferentially transmitting the power supply permission notice to the mobile power receiving device. Computer program. **Claim 10**: A computer program for controlling a non-contact power supply system, wherein the non-contact power supply system includes a power transmission circuit that is supplied with power from a system power source and executes the supply of high-frequency AC power at a predetermined operating frequency, at least one or more power transmission devices connected to the power transmission circuit and capable of non-contact power supply, and a plurality of power receiving devices that receive non-contact power supply from the power transmission device when located anywhere within a power transmission area where power transmission by each power transmission device can be executed. The non-contact power supply system is provided with The computer program causes the computer to implement a power suppression function for controlling each of the plurality of power receiving devices so that the total power supply requested from the plurality of power receiving devices does not exceed the outputtable power, which is the power with which the system power source and the power transmission circuit can continue power supply, by using the power receiving device side information, which is information indicating the operating status of each power receiving device. Each of the power receiving devices transmits the power receiving device side information. The power suppression function includes a function of controlling each power receiving device by using the power receiving device side information. The power transmission circuit includes a DC power circuit (116) that converts AC power supplied from the system power source into DC power, a DC power transmission bus (BSdc) connected to the DC power circuit and supplied with DC power from the DC power circuit, an AC power circuit (118) connected to the DC power transmission bus and converting the DC power supplied from the DC power transmission bus into the high-frequency AC power, and an AC power transmission bus (BSac) connected to the AC power circuit and supplied with the high-frequency AC power from the AC power circuit. The power transmission circuit is provided with The at least one or more power transmission devices are connected to the AC power circuit via the AC power transmission bus. Computer program.

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