JP6789134B2 - Wireless power supply system, management device, management method and management program - Google Patents

Description

The present invention relates to wireless power supply systems, management devices, management methods and management programs.

Conventionally, there has been a case where the power supplied to a plurality of power loads is managed by a management device so that the total power consumption does not exceed the upper limit power.

For example, the power management system disclosed in Patent Document 1 below manages a plurality of power loads so that the current total power consumption of the plurality of power loads does not exceed a predetermined upper limit power of the plurality of power loads. Of the power loads of the above, the remaining power that can be used by the high power use type load is notified to the high power use type load at any time.

International Publication No. 2014/034114

The electric power management system described in Patent Document 1 is used, for example, for electric power management of a detached house, and as a load using a large amount of electric power, for example, a charging facility for an electric vehicle is assumed. In the power management system described in Patent Document 1, the power consumption of a load that uses a large amount of power among a plurality of power loads is managed, and the current total power consumption is managed so as not to exceed the upper limit power.

However, in the technique described in Patent Document 1, only the power consumption of a part of the large power load is adjusted, and the other loads are not managed. Therefore, when applied to a plurality of power feeding devices for supplying power to a transport vehicle in a facility such as a factory, the following problems occur. That is, since only the power consumption of a specific power supply device is adjusted, there is a power supply device whose power consumption is not adjusted, and when the power consumption of the power supply device whose power consumption is not adjusted increases, the total use of a plurality of power supply devices is increased. The power exceeds the rated power consumption of the facility. In facilities such as factories, there are many cases where an electricity usage contract is concluded in which an extra charge is paid if electricity is used in excess of the rated power consumption, and the total power consumption of multiple power supply devices exceeds the rated power consumption of the facility. If this happens, the cost performance and productivity of the facility will decline.

Therefore, when the technique described in Patent Document 1 is applied to a plurality of power supply devices installed in facilities such as factories, the maximum power consumption of the power supply device whose power consumption is not adjusted is estimated and the power consumption is adjusted. It is conceivable to set a low upper limit of the power consumption of a specific power supply device. By performing such an operation, the possibility that the total power consumption of the plurality of power supply devices exceeds the rated power consumption of the facility is reduced. However, in a power supply device whose power consumption is not adjusted, even when the power consumption does not reach the estimated maximum value, the power consumption of a specific power supply device whose power consumption is adjusted can be kept low. The charging efficiency of the transport vehicle is reduced, and the time required for power supply becomes longer. Therefore, the tact time of transportation by the transport vehicle (time required for a series of operations including loading, moving, unloading, and charging time) becomes long, the workability of the transport vehicle deteriorates, and the productivity of the facility decreases. To do. As a result, the productivity of the facility and the workability of the transport vehicle are inefficient.

Therefore, an object of the present invention is to provide a wireless power supply system, a management device, a management method, and a management program in which the total power consumption of a plurality of power supply devices is kept within a certain value and the charging efficiency of a transport vehicle is improved. ..

In the wireless power supply system according to one aspect of the present invention, the total value of the electric power used by the transport vehicle, the plurality of power supply devices that wirelessly supply power to the transport vehicle, and the plurality of power supply devices is equal to or less than a predetermined power value. A management device having a determination unit for determining the available power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices is provided.

According to this aspect, the total power consumption of the plurality of power supply devices is determined by determining the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. It can be kept within a certain value. In addition, by determining the usable power of each of the plurality of power feeding devices according to the operating status of the plurality of power feeding devices, the usable power is adjusted according to the charging status of the transport vehicle, and the charging efficiency of the transport vehicle is improved. be able to.

In the above aspect, the determination unit may determine the usable power of each of the plurality of power supply devices within a range not exceeding the upper limit power set for each of the plurality of power supply devices.

According to this aspect, it is prevented that power is supplied with power equal to or higher than the upper limit power set for each power feeding device, and failure of the power feeding device is prevented.

In the above aspect, the determination unit may determine the available power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices becomes a predetermined power value.

According to this aspect, the total value of the power consumption of the plurality of power supply devices is adjusted to be the maximum power that can be used, the surplus is eliminated for the total power consumption of the plurality of power supply devices, and the charging efficiency of the transport vehicle is reduced. Can be enhanced.

In the above aspect, the operating status of the plurality of power feeding devices may include the number of power feeding devices that are supplying power to the transport vehicle.

According to this aspect, the usable power of each of the plurality of power feeding devices can be determined according to the number of transport vehicles being charged, and the usable power is dynamically changed to improve the charging efficiency of the transport vehicle. be able to.

In the above aspect, the determination unit may determine a value obtained by dividing a predetermined power value by the number of power supply devices that supply power to the transport vehicle as the usable power of each of the plurality of power supply devices.

According to this aspect, when a plurality of transport vehicles are charged at the same time, it is possible to eliminate the bias of the power consumption between the power feeding devices and the bias of the charging efficiency between the transport vehicles.

In the above aspect, the management device further has a ranking unit that assigns a priority regarding the allocation of usable power to the plurality of power supply devices, and the determination unit is a determination unit for each of the plurality of power supply devices according to the priority. The available power may be determined.

According to this aspect, it is possible to increase the usable power of the power feeding device having a high priority so that the charging of the transport vehicle by the power feeding device can be completed earlier.

In the above aspect, the ordering unit may give priority to a plurality of power feeding devices according to the relationship between the installation location of the plurality of power feeding devices and the movement path of the transport vehicle.

According to this aspect, the usable electric power of the plurality of power feeding devices can be determined according to the actual state of movement of the transport vehicle, and the charging efficiency of the transport vehicle can be improved.

In the above aspect, the ordering unit may give priority to a plurality of power feeding devices so that the power feeding device installed in a place where the transport vehicle passes frequently has a higher priority.

According to this aspect, the usable power of the power feeding device, which is estimated to frequently charge the transport vehicle, is determined to be larger than the usable power of other power feeding devices, and the charging time of the transport vehicle is shortened. However, the waiting time for charging the transport vehicle can be reduced.

In the above aspect, the ordering unit may give a priority to a plurality of power feeding devices so that the power feeding device installed in a place where the transport vehicle passes frequently becomes lower.

According to this aspect, it is determined that the available power of the power supply device, which is estimated to frequently charge the transport vehicle, is smaller than the available power of other power supply devices, and the power consumption of a specific power supply device is determined. Can be prevented from protruding and becoming large.

In the above aspect, the transport vehicle has a capacitor charged by a plurality of power supply devices, and the determination unit changes the power consumption of the power supply device that is supplying power to the transport vehicle according to the charging voltage of the capacitors. You may decide.

According to this aspect, the usable power of the power feeding device can be changed so as to follow the charging voltage of the capacitor, and charging can be performed with the load of the capacitor reduced.

The management device according to one aspect of the present invention depends on the operating status of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices that wirelessly supply power to the transport vehicle is equal to or less than a predetermined power value. A determination unit for determining the available power of each of the plurality of power feeding devices is provided.

According to this aspect, the total power consumption of the plurality of power supply devices is determined by determining the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. It can be kept within a certain value. In addition, by determining the usable power of each of the plurality of power feeding devices according to the operating status of the plurality of power feeding devices, the usable power is adjusted according to the charging status of the transport vehicle, and the charging efficiency of the transport vehicle is improved. be able to.

In the management method according to one aspect of the present invention, the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value by the management device that manages the power consumption of the plurality of power supply devices that wirelessly supply power to the transport vehicle. As such, it includes a step of determining the available power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices.

According to this aspect, the total power consumption of the plurality of power supply devices is determined by determining the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. It can be kept within a certain value. In addition, by determining the usable power of each of the plurality of power feeding devices according to the operating status of the plurality of power feeding devices, the usable power is adjusted according to the charging status of the transport vehicle, and the charging efficiency of the transport vehicle is improved. be able to.

In the management program according to one aspect of the present invention, the total value of the power consumption of the plurality of power supply devices is predetermined for the computer provided in the management device that manages the power consumption of the plurality of power supply devices that wirelessly supply power to the transport vehicle. It functions as a determination unit for determining the usable power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices so as to be equal to or less than the power value.

According to this aspect, the total power consumption of the plurality of power supply devices is determined by determining the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. It can be kept within a certain value. In addition, by determining the usable power of each of the plurality of power feeding devices according to the operating status of the plurality of power feeding devices, the usable power is adjusted according to the charging status of the transport vehicle, and the charging efficiency of the transport vehicle is improved. be able to.

According to the present invention, it is possible to provide a wireless power supply system, a management device, a management method, and a management program in which the total power consumption of a plurality of power supply devices is kept within a certain value and the charging efficiency of a transport vehicle is improved.

It is a figure which shows the outline of the wireless power supply system which concerns on embodiment of this invention. It is a functional block diagram of the wireless power supply system which concerns on embodiment of this invention. It is a flowchart of the 1st power supply processing executed by the wireless power supply system which concerns on embodiment of this invention. It is a figure which shows the relationship between the installation place of the power supply device in the wireless power supply system which concerns on embodiment of this invention, and the movement path of a transport vehicle. It is a flowchart which shows the usable power determination process which is executed by the management apparatus which concerns on embodiment of this invention. It is a flowchart of the 2nd power feeding process executed by the wireless power feeding system which concerns on embodiment of this invention. It is a flowchart of the 3rd power supply processing executed by the wireless power supply system which concerns on embodiment of this invention.

Embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, those having the same reference numerals have the same or similar configurations.

FIG. 1 is a diagram showing an outline of a wireless power supply system 100 according to an embodiment of the present invention. The wireless power supply system 100 according to the present embodiment is a first power supply device 31 and a second power supply device that wirelessly supply power to the first transport vehicle 21, the second transport vehicle 22, and the first transport vehicle 21 and the second transport vehicle 22. 32 and a management device 10 for managing the power consumption of each of the first power feeding device 31 and the second power feeding device 32 are included.

The first transport vehicle 21 and the second transport vehicle 22 are automatic guided vehicles, for example, AGVs (Automatic Guided Vehicles) that automatically travel in facilities such as factories, and magnetic tapes laid on the floor surface. It may be a transport vehicle whose movement route is determined by using electromagnetic induction by a magnetic rod or the like. In the figure, the movement routes of the first transport vehicle 21 and the second transport vehicle 22 are simplified and shown. The first transport vehicle 21 and the second transport vehicle 22 are provided with a capacitor as a power source for self-propelling, and when the amount of electricity stored in the capacitor decreases, the first power supply device 31 and the second transport vehicle 22 are autonomously or instructed by the management device 10. It approaches any of the second power feeding devices 32, receives wireless power supply, and charges the capacitor. The management device 10 uses power used by the first power feeding device 31 and the second power feeding device 32 when the first power feeding device 31 and the second power feeding device 32 supply power to the first transport vehicle 21 and the second transport vehicle 22. To manage. In the present embodiment, the wireless power supply system 100 including two transport vehicles and two power supply devices will be described, but the number of transport vehicles and the number of power supply devices included in the wireless power supply system 100 are arbitrary.

FIG. 2 is a functional block diagram of the wireless power supply system 100 according to the embodiment of the present invention. The management device 10 includes a request reception unit 11, a determination unit 12, a power setting storage unit 13, a usable power transmission unit 14, an operation status acquisition unit 15, and a ranking assignment unit 16. The first power feeding device 31 and the second power feeding device 32 each include a wireless power feeding unit 35. The first transport vehicle 21 and the second transport vehicle 22 include a wireless power receiving unit 25 and a capacitor 26, respectively. In this example, the case where the first transport vehicle 21 and the second transport vehicle 22 are provided with the same capacitor 26 will be described, but the type of capacitor and the storage capacity may be different for each transport vehicle.

The request receiving unit 11 of the management device 10 receives a request for notification of available power from a plurality of power supply devices. When power is supplied to the transport vehicle, the plurality of power supply devices transmit a request for notification of available power to the management device 10 prior to power supply, and power the transport vehicle according to the notified usable power.

The determination unit 12 determines the usable power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. In the case of the present embodiment, the determination unit 12 determines the first power supply device 31 and the second power supply device so that the total value of the power used by the first power supply device 31 and the second power supply device 32 is equal to or less than the predetermined power value W. The usable power of each of the first power supply device 31 and the second power supply device 32 is determined according to the operating status of the 32.

The power setting storage unit 13 stores at least the upper limit power set for each of the plurality of power supply devices. The upper limit power may be different for each of the plurality of power feeding devices. The usable power transmission unit 14 transmits the power used by each of the plurality of power supply devices determined by the determination unit 12 to each of the plurality of power supply devices.

The operation status acquisition unit 15 acquires the operation status of a plurality of power supply devices. Here, the operating status of the power feeding device may include the number of power feeding devices that are supplying power to the transport vehicle. The power supply device that supplies power to the transport vehicle shall include a power supply device that waits from the request for notification of usable power to the notification of usable power. In addition, the operation status acquisition unit 15 acquires the operation status of the transport vehicle. Here, the operating status of the transport vehicle may include the position of the transport vehicle and the charging voltage of the capacitor 26.

The ranking unit 16 assigns a priority regarding the allocation of usable power to the plurality of power supply devices. In this case, the determination unit 12 determines the usable power of each of the plurality of power supply devices according to the priority. The assignment of priorities will be described in detail later.

The wireless power supply unit 35 of the first power supply device 31 and the second power supply device 32 has a range of available power determined by the determination unit 12 for either the first transfer vehicle 21 or the second transfer vehicle 22. , Performs wireless power supply by electromagnetic induction. The wireless power receiving unit 25 of the first transport vehicle 21 and the second transport vehicle 22 receives wireless power supply by electromagnetic induction from either the first power supply device 31 or the second power supply device 32. The wireless power feeding unit 35 and the wireless power receiving unit 25 may be, for example, a power transmitting device and a power receiving device that operate in a magnetic field resonance system, and may transmit high frequency power of several kHz to several hundred MHz in a non-contact manner.

The capacitors 26 of the first transport vehicle 21 and the second transport vehicle 22 are electrochemical capacitors such as electric double layer capacitors, and are power supplies for the first transport vehicle 21 and the second transport vehicle 22 to automatically travel. The capacitor 26 may be charged by DC power obtained by converting high frequency power received by the wireless power receiving unit 25.

FIG. 3 is a flowchart of the first power feeding process executed by the wireless power feeding system 100 according to the embodiment of the present invention. The first power feeding device 31 requests the management device 10 to notify the available power in advance when wirelessly supplying power to the transport vehicle (S10).

The management device 10 receives a request for notification of available power by the request receiving unit 11, and a plurality of power supplies are supplied so that the total value of the used powers of the plurality of power supply devices is equal to or less than a predetermined power value W by the determination unit 12. The usable power of the first power feeding device 31 is determined according to the operating status of the device. Here, the predetermined power value W may be the upper limit of the total value of the power used by the plurality of power feeding devices. In the case of this example, since neither the first power feeding device 31 nor the second power feeding device 32 is supplying power, the usable power of the first power feeding device 31 can be W. Here, the determination unit 12 refers to the power setting storage unit 13 and determines the usable power within a range that does not exceed the upper limit power set in the first power feeding device 31. By determining the usable power within the range that does not exceed the upper limit power, it is possible to prevent the power supply from being performed with the power exceeding the upper limit power set for each power supply device, and to prevent the power supply device from failing. In this example, it is assumed that the predetermined power value W does not exceed either the upper limit power set in the first power feeding device 31 or the upper limit power set in the second power feeding device 32. If the predetermined power value W exceeds the upper limit power Wmax set in the power feeding device, the determination unit 12 determines the usable power of the power feeding device to be equal to or less than the upper limit power Wmax.

The usable power transmission unit 14 notifies the first power supply device 31 of the usable power determined by the determination unit 12 as usable power (S11). The first power supply device 31 starts power supply to the transport vehicle with the power supply power W, which is the upper limit of the notified usable power (S12).

While the first power supply device 31 is supplying power to the transport vehicle with the power supply power W, the second power supply device 32 requests the management device 10 to notify the available power in order to wirelessly supply power to the transport vehicle. (S13). In the case of this example, the first power supply device 31 is supplying power with the power supply power W, and the second power supply device 32 is in an operating state of standby for power supply from now on. Therefore, the determination unit 12 first supplies power to the transport vehicle according to the number of power supply devices (including power supply devices waiting for notification of available electric power to supply power to the transport vehicle). The usable power of each of the power feeding device 31 and the second power feeding device 32 is determined. By such a function of the determination unit 12, the usable power of each of the plurality of power feeding devices can be determined according to the number of the transport vehicles being charged, and the usable power can be dynamically changed to change the usable power of the transport vehicle. Charging efficiency can be increased.

More specifically, the determination unit 12 determines the value obtained by dividing the predetermined power value W by the number of power supply devices that supply power to the transport vehicle as the usable power of each of the plurality of power supply devices. In the case of this example, since the number of power supply devices that supply power to the transport vehicle is 2, the determination unit 12 sets the usable power of each of the first power supply device 31 and the second power supply device 32 to W / 2. decide. By evenly allocating electric power to a plurality of power feeding devices in this way, when charging a plurality of transport vehicles at the same time, it is possible to eliminate the bias of the power consumption among the power feeding devices and to eliminate the bias of the charging efficiency among the transport vehicles. It can be eliminated.

The determination unit 12 determines the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices becomes a predetermined power value W. In the case of this example, the usable power of each of the first power feeding device 31 and the second power feeding device 32 is determined to be W / 2, and the total value thereof is a predetermined power value W. Generally, the determination unit 12 determines that the usable power of the first power feeding device 31 is W × d (0 ≦ d ≦ 1), and determines that the usable power of the second power feeding device 32 is W × (1-d). You can do it. In this way, by making the total value of the used power match the predetermined power value W (upper limit of the total value of the used power), the total value of the used power of the plurality of power supply devices becomes the maximum usable power. The surplus is eliminated for the total power consumption of the plurality of power supply devices, and the charging efficiency of the transport vehicle can be improved.

The management device 10 notifies the first power supply device 31 and the second power supply device 32 of the usable power W / 2 determined by the determination unit 12 by the usable power transmission unit 14 (S14). At this time, the management device 10 first transmits a notification of the usable power to the first power feeding device 31, waits for the elapse of a predetermined time, and then transmits a notification of the usable power to the second power feeding device 32. By first transmitting the change notification of the available power to the power supply device that is already supplying power, the total value of the used power can be prevented from exceeding the predetermined power value W. Upon receiving the notification, the first power supply device 31 changes the power supply power from W to W / 2 (S15). After that, the second power supply device 32 starts power supply to the transport vehicle with the power supply power W / 2 (S16).

The first power supply device 31 finishes charging the transport vehicle, ends power supply, and notifies the management device 10 of the end of power supply (S17). The determination unit 12 of the management device 10 determines the usable power of the second power supply device 32 to be W according to the operating status that only the second power supply device 32 is supplying power. The usable power transmission unit 14 notifies the second power feeding device 32 of the usable power W (S18).

Upon receiving the notification, the second power supply device 32 changes the power supply power from W / 2 to W (S19). After that, the second power supply device 32 finishes charging the transport vehicle, ends the power supply, and notifies the management device 10 of the end of the power supply (S20). As described above, the first power feeding process executed by the wireless power feeding system 100 is completed.

According to the wireless power supply system 100 according to the present embodiment, a plurality of power supply devices can be used by determining the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. The total power consumption of the power supply device can be kept within a certain value. In addition, by determining the usable power of each of the plurality of power feeding devices according to the operating status of the plurality of power feeding devices, the usable power is adjusted according to the charging status of the transport vehicle, and the charging efficiency of the transport vehicle is improved. be able to. The management device 10 determines and notifies the usable power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices, thereby keeping the total power consumption of the plurality of power supply devices within a certain value. The usable power of each power supply device can be dynamically changed to optimize the charging efficiency of the transport vehicle.

FIG. 4 is a diagram showing the relationship between the installation location of the power supply device and the movement path of the transport vehicle in the wireless power supply system 100 according to the embodiment of the present invention. In the figure, the installation location of the first power feeding device 31 and the second power feeding device 32, the first moving path R1 which is the moving path of the first transport vehicle 21, and the second moving which is the moving path of the second transport vehicle 22. The route R2 and. The first movement path R1 and the second movement path R2 may be defined by a magnetic tape or the like laid on the floor surface, but the first transport vehicle 21 and the second transport vehicle 22 autonomously travel. It may be the movement route of the case.

As shown in the figure, when the first transport vehicle 21 moves along the first movement path R1, it can receive power from both the first power feeding device 31 and the second power feeding device 32. On the other hand, when the second transport vehicle 22 moves along the second movement path R2, it can receive power from the second power feeding device 32, but cannot receive power from the first power feeding device 31. The first power feeding device 31 of this example is installed in a place where the transport vehicle passes relatively infrequently, and the second power feeding device 32 is installed in a place where the transport vehicle passes relatively frequently. ing.

FIG. 5 is a flowchart showing a usable power determination process executed by the management device 10 according to the embodiment of the present invention. The management device 10 calculates the frequency r1 through which the transport vehicle passes for the first power feeding device 31 (S30). The frequency with which the transport vehicle of the first power feeding device 31 passes may be calculated, for example, by dividing the average moving speed of the first transport vehicle 21 by the distance of the first movement path R1. Further, the management device 10 may periodically acquire the position of the first transport vehicle 21 by the operation status acquisition unit 15 and measure the frequency with which the transport vehicle passes through the first power supply device 31.

The management device 10 calculates the frequency r2 through which the transport vehicle passes for the second power feeding device 32 (S31). The frequency with which the transport vehicle of the second power feeding device 32 passes is, for example, the value obtained by dividing the average moving speed of the first transport vehicle 21 by the distance of the first movement path R1 and the average moving speed of the second transport vehicle 22. 2 It may be calculated by adding the value divided by the distance of the moving path R2. Further, the management device 10 periodically acquires the positions of the first transport vehicle 21 and the second transport vehicle 22 by the operation status acquisition unit 15 and measures the frequency with which the transport vehicle passes through the second power supply device 32. May be good.

The ordering unit 16 of the management device 10 is based on the frequency r1 through which the transport vehicle for the first power supply device 31 passes and the frequency r2 for the transport vehicle for the second power supply device 32 to pass, and the first power supply device 31 and Priority is given to the second power feeding device 32 (S32). The determination unit 12 determines the usable power of each of the first power supply device 31 and the second power supply device 32 according to the priority given by the order assignment unit 16 (S33). By giving priority to a plurality of power supply devices and determining the usable power according to the priority, the usable power of the power supply device having a high priority is increased, and the transport vehicle can be charged quickly by the power supply device. You can try to finish it. Therefore, the usable power that is not uniform is allocated, and the transport vehicle can be charged flexibly.

In general, the ordering unit 16 assigns a priority to a plurality of power feeding devices according to the relationship between the installation location of the plurality of power feeding devices and the movement path of the transport vehicle. By considering the relationship between the installation location of the power supply device and the movement path of the transport vehicle, the usable power of multiple power supply devices can be determined according to the actual state of movement of the transport vehicle, and the charging efficiency of the transport vehicle can be improved. Can be enhanced.

In the following, the determination unit 12 determines that the usable power of the first power feeding device 31 is W × d (0 ≦ d ≦ 1), and sets the usable power of the second power feeding device 32 to W × (1-d). The case of deciding will be described. The ranking giving unit 16 may give a priority to a plurality of power feeding devices so that the power feeding device installed in a place where the transport vehicle passes frequently has a higher priority. For example, when the frequency r2 through which the transport vehicle of the second power supply device 32 passes is greater than the frequency r1 through which the transport vehicle of the first power supply device 31 passes (r2> r1), the first power supply device is set to d <1/2. The usable power of 31 may be determined to be W × d, and the usable power of the second power feeding device 32 may be determined to be W × (1-d). That is, the determination unit 12 may determine that the usable power of the second power feeding device 32 is larger than the usable power of the first power feeding device 31. Here, the value of d may be any value that satisfies d <1/2. For example, using the sigmoid function S (t) = (1 + exp (−t)) ^-1 , d = S (1-). It may be defined as r2 / r1) so that the larger the difference in the passing frequency, the larger the bias of the usable power.

By making the power supply device installed in a place where the transport vehicle passes more frequently, the priority is higher, so that the usable power of the power supply device that is estimated to charge the transport vehicle more frequently can be used for other power supply. It is determined to be larger than the usable power of the device, and the charging time of the transport vehicle can be shortened, and the charging waiting time of the transport vehicle can be reduced.

The order giving unit 16 may give a priority to a plurality of power feeding devices so that the power feeding device installed in a place where the transport vehicle passes frequently becomes lower. For example, when the frequency r2 through which the transport vehicle of the second power supply device 32 passes is greater than the frequency r1 through which the transport vehicle of the first power supply device 31 passes (r2> r1), the first power supply device is set to d> 1/2. The usable power of 31 may be determined to be W × d, and the usable power of the second power feeding device 32 may be determined to be W × (1-d). That is, the determination unit 12 may determine that the usable power of the second power feeding device 32 is smaller than the usable power of the first power feeding device 31. Here, the value of d may be any value that satisfies d> 1/2. For example, using the sigmoid function S (t) = (1 + exp (−t)) ^-1 , d = S (r2 / r2 /). It may be defined as r1-1) so that the larger the difference in the passing frequency, the larger the bias of the usable power.

By making the power supply device installed in a place where the transport vehicle passes more frequently, the priority is lower, so that the available power of the power supply device that is estimated to charge the transport vehicle more frequently can be used for other power supply. It is determined that the power consumption of the device is smaller than the usable power of the device, and it is possible to prevent the power consumption of a specific power supply device from becoming excessively large.

FIG. 6 is a flowchart of a second power feeding process executed by the wireless power feeding system 100 according to the embodiment of the present invention. The first power feeding device 31 requests the management device 10 to notify the available power in advance when wirelessly supplying power to the transport vehicle (S40).

The management device 10 receives the request for notification of the available power by the request receiving unit 11, and since there is no power supply device during power supply, the determination unit 12 determines the usable power of the first power supply device 31 as W. Then, the usable power transmission unit 14 notifies the first power supply device 31 of the usable power W (S41). The first power supply device 31 starts power supply to the transport vehicle with the power supply power W, which is the upper limit of the notified usable power (S42).

While the first power supply device 31 is supplying power to the transport vehicle with the power supply power W, the second power supply device 32 requests the management device 10 to notify the available power in order to wirelessly supply power to the transport vehicle. (S43). In the case of this example, the first power supply device 31 is supplying power with the power supply power W, and the second power supply device 32 is in an operating state of waiting for power supply from now on. Further, the second power feeding device 32 is given a higher priority than the first power feeding device 31 by the ranking giving unit 16. Therefore, the determination unit 12 determines the usable power of the first power feeding device 31 to be W × d (d <1/2) according to the priority, and sets the usable power of the second power feeding device 32 to W × (W × (d <1/2)). 1-d) is determined.

The management device 10 notifies the first power supply device 31 of the usable power W × d by the usable power transmission unit 14 (S44), and the usable power W × (1-) to the second power supply device 32. Notify d) (S45). At this time, the management device 10 first transmits a notification of the usable power to the first power feeding device 31, waits for the elapse of a predetermined time, and then transmits a notification of the usable power to the second power feeding device 32. By first transmitting the change notification of the available power to the power supply device that is already supplying power, the total value of the used power can be prevented from exceeding the predetermined power value W. Upon receiving the notification, the first power supply device 31 changes the power supply power from W to W × d (S46). After that, the second power feeding device 32 starts supplying power to the transport vehicle with the power feeding power W × (1-d) (S47).

In this example, as a result of determining the usable power according to the passing frequency of the transport vehicle, the usable power of the second power feeding device 32 is larger than the usable power of the first power feeding device 31. Therefore, in this example, the second power supply device 32 finishes charging the transport vehicle and ends the power supply before the first power supply device 31, and notifies the management device 10 of the end of the power supply (S48). The determination unit 12 of the management device 10 determines the usable power of the first power supply device 31 to be W according to the operating status that only the first power supply device 31 is supplying power. The usable power transmission unit 14 notifies the first power supply device 31 of the usable power W (S49).

Upon receiving the notification, the first power supply device 31 changes the power supply power from W × d to W (S50). After that, the first power supply device 31 finishes charging the transport vehicle, ends the power supply, and notifies the management device 10 of the end of the power supply (S51). As described above, the second power feeding process executed by the wireless power feeding system 100 is completed.

FIG. 7 is a flowchart of a third power feeding process executed by the wireless power feeding system 100 according to the embodiment of the present invention. In this example, a case where the determination unit 12 determines the usable power of the power supply device that is supplying power to the transport vehicle so as to change according to the charging voltage of the capacitor 26 provided in the transport vehicle will be described.

The first power feeding device 31 (or the second power feeding device 32) requests the management device 10 to notify the available power in advance when wirelessly supplying power to the transport vehicle (S60). The management device 10 acquires the charging voltage of the capacitor 26 for the transport vehicle waiting for charging by the operating status acquisition unit 15 (S61). Then, the determination unit 12 calculates the magnification v1 (0 <v1 ≦ 1) according to the charging voltage of the capacitor 26, determines the usable power as W × v1, and the usable power transmission unit 14 determines the usable power. Notify W × v1 to the first power supply device 31 (S62). The first power supply device 31 starts power supply to the transport vehicle with the power supply power W × v1 which is the upper limit of the notified usable power (S63).

The management device 10 continuously acquires the charging voltage of the capacitor 26 for the transport vehicle being charged by the operating status acquisition unit 15. The determination unit 12 calculates the magnification v2 (0 <v1 ≦ v2 ≦ 1) according to the charging voltage of the capacitor 26, determines the usable power as W × v2, and the usable power transmission unit 14 determines the usable power. Notify W × v2 to the first power supply device 31 (S64). The first power supply device 31 changes the power supply power from W × v1 to W × v2 (S65). After that, the first power supply device 31 finishes charging the transport vehicle, ends the power supply, and notifies the management device 10 of the end of the power supply (S66). As described above, the third power feeding process executed by the wireless power feeding system 100 is completed. In this example, the case where the usable power is changed once has been described, but the usable power may be changed twice or more, or may be continuously changed according to the charging voltage of the capacitor 26. ..

By determining that the usable power of the power supply device that is supplying power to the transport vehicle changes according to the charge voltage of the capacitor 26 provided in the transport vehicle, the change in the charge voltage of the capacitor 26 can be followed. The usable power of the power feeding device can be changed, and charging can be performed with the load of the capacitor 26 reduced. Further, since the charging voltage of the capacitor 26 increases in proportion to the amount of electric charge stored in the capacitor 26, the usable power can be increased as the charging progresses, so that the capacitor 26 can be charged with a constant current.

The embodiments described above are for facilitating the understanding of the present invention, and are not for limiting and interpreting the present invention. Each element included in the embodiment and its arrangement, material, condition, shape, size, etc. are not limited to those exemplified, and can be changed as appropriate. In addition, the configurations shown in different embodiments can be partially replaced or combined.

10 ... Management device, 11 ... Request receiving unit, 12 ... Determining unit, 13 ... Power setting storage unit, 14 ... Usable power transmission unit, 15 ... Operating status acquisition unit, 16 ... Ranking unit, 21 ... First transport vehicle , 22 ... 2nd carrier, 25 ... Wireless power receiving unit, 26 ... Capacitor, 31 ... 1st power supply device, 32 ... 2nd power supply device, 35 ... Wireless power supply unit, 100 ... Wireless power supply system, R1 ... 1st movement route , R2 ... Second movement route.

Claims (11)

With a transport vehicle
A plurality of power supply devices that wirelessly supply power to the transport vehicle,
A determination unit that determines the usable power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value. Equipped with a management device that has
The management device assigns a priority regarding the allocation of usable electric power to the plurality of power supply devices according to the relationship between the installation location of the plurality of power supply devices and the movement path of the transport vehicle. Have more
The determination unit determines the usable power of each of the plurality of power supply devices according to the priority.
Wireless power supply system. The determination unit determines the usable power of each of the plurality of power supply devices within a range not exceeding the upper limit power set for each of the plurality of power supply devices.
The wireless power supply system according to claim 1. The determination unit determines the usable power of each of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices becomes the predetermined power value.
The wireless power supply system according to claim 1 or 2. The operating status of the plurality of power feeding devices includes the number of power feeding devices supplying power to the transport vehicle.
The wireless power supply system according to any one of claims 1 to 3. The determination unit determines the value obtained by dividing the predetermined power value by the number of power supply devices that are supplying power to the transport vehicle as the usable power of each of the plurality of power supply devices.
The wireless power supply system according to any one of claims 1 to 4. The order giving unit gives the priority to the plurality of power feeding devices so that the power feeding device installed in a place where the transport vehicle frequently passes is higher.
The wireless power supply system according to any one of claims 1 to 5 . The ranking giving unit assigns the priority to the plurality of power feeding devices so that the power feeding device installed in a place where the transport vehicle frequently passes is lowered.
The wireless power supply system according to any one of claims 1 to 5 . The transport vehicle has a capacitor that is charged by the plurality of power feeding devices.
The determination unit determines the usable power of the power supply device that is supplying power to the transport vehicle so as to change according to the charging voltage of the capacitor.
The wireless power supply system according to any one of claims 1 to 7 . The usable power of each of the plurality of power supply devices is determined according to the operating status of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices that wirelessly supply power to the transport vehicle is equal to or less than a predetermined power value. a determination unit to determine the,
A ranking unit for assigning a priority regarding the allocation of usable electric power to the plurality of power supply devices according to the relationship between the installation location of the plurality of power supply devices and the movement path of the transport vehicle is provided.
The determination unit determines the usable power of each of the plurality of power supply devices according to the priority.
Management device. By a management device that manages the power consumption of multiple power supply devices that wirelessly supply power to the transport vehicle
A step of determining the usable power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value .
Includes a step of assigning a priority regarding the allocation of usable power to the plurality of power supply devices according to the relationship between the installation location of the plurality of power supply devices and the movement path of the transport vehicle.
The determination step determines the available power of each of the plurality of power supply devices according to the priority.
Management method. A computer equipped with a management device that manages the power consumption of multiple power supply devices that wirelessly supply power to the transport vehicle.
A determination unit that determines the usable power of each of the plurality of power supply devices according to the operating status of the plurality of power supply devices so that the total value of the power consumption of the plurality of power supply devices is equal to or less than a predetermined power value . as well as
The priority regarding the allocation of usable power is made to function as a ranking assigning unit that gives priority to the plurality of power supply devices according to the relationship between the installation location of the plurality of power supply devices and the movement path of the transport vehicle .
The determination unit determines the usable power of each of the plurality of power supply devices according to the priority.
Management program.