JP2017093234A - Power supply device and power supply method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device capable of supplying electric power to more power reception devices, and a power supply method.SOLUTION: The power supply device comprises: a power source unit 3; a power supply antenna unit 2 for supplying electric power from the power source unit to a power reception device 200; a power measurement unit 7 for measuring a power value of electric power; a communication unit 5 for communicating with the power reception device; and a control unit 4 for acquiring the power value after transmitting a loading disconnection signal through the communication unit to the power reception device in supplying electric power, and determining whether to supply electric power to a new power reception device on the basis of the acquired power value.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power feeding device and a power feeding method, and more particularly, to a power feeding device and a power feeding method including a communication unit.

  Conventionally, a power feeding device and a power feeding method including a communication unit are known (for example, see Patent Document 1).

  Patent Document 1 discloses a wireless power transmission system including a communication unit. The wireless power transmission system includes a power transmission device and a power reception device. The communication unit is provided in each of the power transmission device and the power reception device, and is configured to perform wireless communication complying with a predetermined standard. Further, the power receiving device is configured to reduce the load and reduce the magnitude of the power to be received when authentication by the power transmitting device is performed. The power receiving device is configured to increase the load and increase the amount of power to be received when the authentication is successful.

  Conventionally, a power feeding device and a power feeding method including a communication unit are known.

  The power supply device including the communication unit is set with a class according to a power value that can be supplied by the power supply device according to a predetermined standard (for example, A4WP (Alliance for Wireless Power) standard). Similarly to the power supply apparatus, the power reception apparatus that receives power from the power supply apparatus is set with a category according to the power value consumed by the power reception apparatus according to a predetermined standard (for example, A4WP standard). Then, the power supply apparatus acquires category information from the power receiving apparatus via the communication unit, and determines whether or not to supply power to the power receiving apparatus based on the acquired category and the class of the power supply apparatus. It is configured.

Japanese Patent Application Laid-Open No. 2015-8619

  However, in the wireless power transmission system of Patent Document 1, power is supplied to the power receiving device only when authentication by the power transmitting device is successful. Here, when authenticating the power receiving device, the power transmitting device acquires category information from the power receiving device via the communication unit, and based on the acquired category information and power class information. It is considered that the system is configured to determine whether the authentication is successful (whether power is supplied). For this reason, the power transmission device of Patent Document 1 fails to authenticate the power receiving device based on the category even when there is a margin in the power value that can be supplied when power is actually supplied (power supply). It is thought that it is configured to perform control. Therefore, in the wireless power transmission system of Patent Document 1, it is considered that there is a case where power cannot be supplied to the power receiving device even when there is a margin in the power value that can be supplied by the power transmission device (power supply device). As a result, the wireless power transmission system of Patent Document 1 has a problem that it is difficult to supply power to more power receiving devices.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power feeding device and a power feeding method capable of feeding power to more power receiving devices. is there.

  In order to achieve the above object, a power supply device according to a first aspect of the present invention includes a power supply unit, a power supply antenna unit that supplies power from the power supply unit to a power reception device, and power measurement that measures a power value of power. And a communication unit that communicates with the power receiving device, and a power receiving device that is supplying power to the power receiving device via the communication unit, and after transmitting the load disconnecting signal, the power value is obtained. And a control unit that determines whether or not to supply power to the new power receiving device based on the acquired power value.

  In the power supply device according to the first aspect of the present invention, as described above, the control unit transmits the load disconnection signal to the power receiving device that is supplying power via the communication unit, and transmits the load disconnection signal. After that, the power value is acquired, and based on the acquired power value, it is configured to determine whether to supply power to the new power receiving apparatus. As a result, it is possible to acquire an actual power value to be supplied to the new power receiving apparatus and determine whether to supply power to the new power receiving apparatus based on the actual power value. As a result, since it is based on the actual power value, unlike the case where it is determined whether or not to supply power to the new power receiving device by simply using the new power receiving device category, there is a margin in the power value that can be supplied. Even when there is, it can be determined that power is not supplied to a new power receiving apparatus. In addition, by transmitting a load disconnection signal to a power receiving device that supplies power, when supplying power to a new power receiving device and acquiring a power value, the power to be supplied becomes insufficient. Can be suppressed. As a result, an opportunity to supply power to a new power receiving device can be ensured more reliably. As a result, power can be supplied to more power receiving devices.

  In the power feeding device according to the first aspect, preferably, the power feeding antenna unit is configured to supply power to the plurality of power receiving devices, and the control unit acquires power category information from the new power receiving device. The load disconnection signal is transmitted to at least one power receiving device among the plurality of power receiving devices, and the supply of power equal to or greater than the amount of power corresponding to the power category information is stopped. With this configuration, when supplying power to a new power receiving apparatus and obtaining a power value, supply of power exceeding the amount of power corresponding to the power category information is stopped, so there is not enough power to supply power. It can suppress more reliably that it will be in the state to do.

  In the power supply device according to the first aspect described above, preferably, the control unit transmits a load disconnection signal to all of the plurality of power receiving devices that supply power, and supplies power to the new power receiving device. Configured to retrieve values. With this configuration, it is possible to simplify the control process and to generate a new power reception as compared with the case where a part of a plurality of power receiving devices that supply power is selected and a load disconnection signal is transmitted. When power is supplied to the apparatus and the power value is acquired, it is possible to further suppress the state where the power to be supplied is insufficient.

  In the power supply device according to the first aspect, preferably, the control unit outputs a maximum load command signal for instructing to operate with the maximum load among the new power reception device and the power reception device that supplies power. While transmitting to at least one, it is comprised based on the acquired electric power value so that it may be judged whether electric power is supplied to a new power receiving apparatus. If configured in this way, the power value supplied to the power receiving device that transmitted the maximum load command signal corresponds to the maximum value of the power value actually supplied to the power receiving device, so without using the category of the power receiving device, Whether or not to supply power to the power receiving device can be determined based on the maximum value of the power value actually supplied to the power receiving device. As a result, even when the load of the power receiving apparatus becomes maximum, it is possible to suppress a state where the power to be supplied is insufficient.

  In this case, preferably, the power feeding antenna unit is configured to be able to supply power to a plurality of power receiving devices, and the control unit receives a maximum load command signal, a new power receiving device, and a plurality of power supplying devices. Whether or not to supply power to the new power receiving device based on the acquired power value. It is configured to judge. With this configuration, since it is determined whether or not power is supplied to each of the plurality of power receiving devices, even when the load on any power receiving device becomes maximum, the power to be supplied becomes insufficient. Can be suppressed.

  In the power feeding device that transmits the maximum load command signal to each of the power receiving devices described above, preferably, the control unit acquires each power value supplied to the power receiving device that transmitted the maximum load command signal, and totals the acquired power values. When the value is less than or equal to the maximum power supply value that is the maximum value of power that can be supplied from the power supply unit, control is performed to supply power to the new power receiving device and to the power receiving device that is supplying power. Has been. With this configuration, it is possible to easily determine whether or not to supply power even when power is supplied to a plurality of power receiving devices by comparing the total value of the acquired power values and the maximum power supply power value. Can do.

  In the power feeding device that transmits the maximum load command signal to each of the power receiving devices, preferably, the control unit sequentially outputs the maximum load command signal to each of the new power receiving device and the plurality of power receiving devices that supply power. While transmitting, it is comprised so that the electric power value corresponding to a new power receiving apparatus and the power receiving apparatus which is supplying electric power may be acquired sequentially, respectively. If comprised in this way, unlike the case where all the electric power values corresponding to a several power receiving apparatus are acquired simultaneously, even if the total value of the acquired electric power value exceeds the maximum feeding electric power value, it will be acquired easily. The total power value can be acquired.

  In the power supply device that transmits the maximum load command signal to the power receiving device, preferably, the control unit acquires identification information from the new power receiving device via the communication unit, and the identification information acquired from the new power receiving device is When the identification information is the same as the previously acquired identification information, control is performed to supply power to the new power receiving device without transmitting the maximum load command signal to the new power receiving device. According to this configuration, when the power receiving apparatus is temporarily removed from the power supply apparatus and the power supply is temporarily stopped and then the same power receiving apparatus is disposed again in the power supply apparatus, the determination is made based on the identification information. By doing so, it is possible to resume power supply without determining whether or not to supply power. That is, it is possible to quickly resume power supply to the power receiving apparatus because it is not necessary to determine whether or not to supply power.

  In this case, preferably, the apparatus further includes an impedance measurement unit that measures the impedance of the feeding antenna unit, and the control unit is the case where the identification information acquired from the new power receiving apparatus is the same as the identification information acquired in advance, and When the amount of change in the impedance measurement value corresponding to the identification information acquired from the new power receiving apparatus with respect to the impedance measurement value corresponding to the identification information acquired in advance is larger than the first threshold, A maximum load command signal is transmitted to the power receiving device. According to this configuration, when the power receiving apparatus is temporarily removed from the power supply apparatus and the power supply is temporarily stopped and then the same power receiving apparatus is disposed again in the power supply apparatus, the placement and the like change. Thus, even when the coupling coefficient (power feeding efficiency) changes, it can be appropriately determined whether or not power feeding is possible.

  Preferably, the power supply device including the impedance measurement unit further includes a notification unit that notifies the user of information, and the control unit has the same identification information acquired in advance as the identification information acquired from the new power reception device. And, when the increase amount of the measured value of the impedance corresponding to the identification information acquired from the new power receiving apparatus with respect to the measured value of the impedance corresponding to the previously acquired identification information is equal to or larger than the second threshold value, The notification unit is configured to perform control for notifying the user that a new power receiving device placement request is requested. If configured in this way, when the power receiving device is temporarily removed from the power feeding device, and the power feeding is temporarily stopped, then when the power receiving device is again arranged in the power feeding device, the way of placing changes, When the coupling coefficient (power feeding efficiency) changes, the notification unit can notify the user that the placement method is to be corrected. As a result, power can be supplied with high efficiency.

  In the power supply apparatus that acquires identification information from the power receiving apparatus, preferably, the control unit is the case where the identification information acquired from the new power receiving apparatus is the same as the identification information acquired in advance, and the identification acquired in advance. The amount of change in the power value supplied from the power supply unit corresponding to the identification information acquired from the new power receiving apparatus to the power value supplied from the power supply unit corresponding to the information to the power supply antenna unit is the third value. When it is larger than the threshold value, the maximum load command signal is transmitted to a new power receiving apparatus. With this configuration, it is possible to determine whether or not to perform power supply using a power measurement unit provided in advance in the power supply apparatus. Unlike the case of determining whether or not to determine whether or not, it is not necessary to provide an impedance measuring unit. As a result, it is possible to suppress the complexity of the configuration of the power feeding apparatus as much as it is not necessary to provide an impedance measurement unit.

  A power supply method according to a second aspect of the present invention supplies power from a power supply unit to a power receiving device from the power supply device, transmits a load disconnection signal to the power receiving device that supplies power from the power supply device, and disconnects the load. After transmitting the signal, the power value of the power is measured and acquired, and based on the acquired power value, it is determined whether to supply power to the new power receiving apparatus.

  In the power supply method according to the second aspect of the present invention, as described above, the load disconnection signal is transmitted to the power receiving device that is supplying power from the power supply device, and after the load disconnection signal is transmitted, the power value of the power is calculated. Power supply to more power receiving devices in the power supply method according to the second aspect by determining whether or not to supply power to a new power receiving device based on the measured and acquired power value Can do.

  According to the present invention, power can be supplied to more power receiving devices as described above.

It is the perspective view which showed the whole structure of the electric power feeder and power receiving device by 1st Embodiment of this invention. It is the block diagram which showed the structure of the electric power feeder and power receiving device by 1st Embodiment of this invention. It is the block diagram which showed the structure of the power receiving apparatus by 1st Embodiment of this invention. It is a flowchart for demonstrating the control processing of the electric power feeding availability determination of the electric power feeder by 1st Embodiment of this invention. It is the block diagram which showed the structure of the electric power feeder by 2nd Embodiment of this invention. It is a figure for demonstrating the management table | surface of the electric power feeder by 2nd Embodiment of this invention. It is a flowchart for demonstrating the control processing of execution determination of the electric power feeding availability determination control of the electric power feeder by 2nd Embodiment of this invention. It is the block diagram which showed the structure of the electric power feeder by 3rd Embodiment of this invention. It is a flowchart for demonstrating the alerting | reporting control processing of how to arrange | position the electric power feeder by 3rd Embodiment of this invention. It is the block diagram which showed the structure of the power receiving apparatus by 4th Embodiment of this invention. It is the perspective view which showed the structure of the electric power feeder by the 1st modification of 1st-4th embodiment of this invention. It is the block diagram which showed the structure of the electric power feeder by the 1st modification of 1st-4th embodiment of this invention. It is the block diagram which showed the structure of the electric power feeder by the 2nd modification of 1st-4th embodiment of this invention. It is a figure for demonstrating the management table | surface of the electric power feeder by the 2nd modification of 1st-4th embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
With reference to FIGS. 1-3, the structure of the electric power feeder 100 by 1st Embodiment of this invention is demonstrated. As illustrated in FIG. 1, the power supply device 100 according to the first embodiment has a plurality of power reception devices 200 arranged in the vicinity of the power supply device 100, wires, contacts, and the like between the power supply device 100 and the power reception device 200. Without being provided, power is supplied (as a wireless power supply device, a non-contact power supply device, or a non-contact power supply device) using a magnetic resonance method. Further, the power supply apparatus 100 and the plurality of power reception apparatuses 200 form a power supply system (wireless power supply system).

(Overall configuration of power supply device)
As shown in FIG. 1, a plurality of (for example, three) power receiving devices 200 are placed on the upper surface 1 of the power feeding device 100. The power feeding apparatus 100 includes a power feeding antenna unit 2. The power feeding antenna unit 2 supplies power (power feeding) to, for example, a power receiving antenna unit 201a of a PC (Personal Computer) 200a, a power receiving antenna unit 201b of the smartphone 200b, and a power receiving antenna unit 201c of the multifunction timepiece 200c. ) Is configured to.

  As illustrated in FIG. 2, the power supply apparatus 100 includes a power supply unit 3, a control unit 4, a communication unit 5, a storage unit 6, and a power measurement unit 7.

  Here, in the first embodiment, the control unit 4 transmits a load disconnection signal to the power receiving device 200 that is supplying power via the communication unit 5 and transmits the load disconnection signal. P is acquired, and based on the acquired power value P, it is configured to determine whether or not to supply power to the new power receiving apparatus 200.

  Specifically, in the first embodiment, the control unit 4 transmits a maximum load command signal instructing to operate with the maximum load to the power receiving device 200 via the communication unit 5 and the maximum load command signal. The power supply P determining process determines whether to supply power to the power receiving apparatus 200 that has transmitted the maximum load command signal based on the acquired power value P. (See FIG. 4).

(Configuration of each part of the power feeding device)
As shown in FIG. 2, the feeding antenna unit 2 includes a feeding coil 21 and a matching circuit 22. The power supply coil 21 is configured to generate a power supply magnetic field using AC power supplied from the power supply unit 3. The matching circuit 22 includes, for example, a resonance capacitor and the like, and is configured to match the impedance of the feeding coil 21 and the impedance of the power supply unit 3. The power feeding antenna unit 2 is configured to supply power to the plurality of power receiving devices 200 using a power feeding magnetic field.

  The power supply unit 3 is configured to acquire power from an external commercial power supply (not shown) or a battery unit (not shown). The power supply unit 3 includes, for example, a so-called class E amplifier circuit capable of zero voltage switching. Then, the power supply unit 3 has a voltage value based on a command from the control unit 4 and a frequency (for example, 6.78 MHz) based on a predetermined standard (A4WP (Alliance For Wireless Power) standard) for the acquired power. It is comprised so that electric power conversion may be carried out to the alternating current electric power which has. The power supply unit 3 is configured to supply AC power to the feeding antenna unit 2.

  The control unit 4 is configured to control the operation of each unit of the power supply apparatus 100. In addition, the control unit 4 is configured to perform power supply availability determination control processing. Details of the power supply availability determination control process will be described later with reference to the flowchart of FIG.

  The communication unit 5 is configured to perform wireless communication with the power receiving apparatus 200 based on a predetermined standard (for example, Bluetooth (registered trademark) standard).

  The storage unit 6 is configured to store a measurement result (power value P) of the power measurement unit 7 based on a command from the control unit 4.

  The power measurement unit 7 is arranged between the power supply unit 3 and the power supply antenna unit 2 and is configured to measure the magnitude of the power value P supplied from the power supply unit 3 to the power supply antenna unit 2. Specifically, the power measuring unit 7 measures the power value P by obtaining the voltage value applied to the power feeding antenna unit 2 or the current value flowing from the power source unit 3 to the power feeding antenna unit 2. It is configured.

(Configuration of control unit)
Here, in the first embodiment, the control unit 4 transmits the maximum load command signal to each of the plurality of power receiving apparatuses 200 and also supplies the power value P supplied to the plurality of power receiving apparatuses 200 that transmitted the maximum load command signal. Are respectively acquired, and based on the acquired power value P, power supply availability determination control is performed.

  Moreover, in 1st Embodiment, the control part 4 acquires the electric power value P electrically fed to the several power receiving apparatus 200 which transmitted the maximum load command signal, respectively, and the total value PS of the acquired electric power value P is the power supply part. 3 is configured to perform control of supplying power to all the power receiving devices 200 that have transmitted the maximum load command signal when the power value is equal to or less than the maximum power supply value PM that is the maximum power value that can be supplied from 3.

  Specifically, in the first embodiment, the control unit 4 sequentially transmits the maximum load command signal to each of the plurality of power receiving devices 200 and also the power value corresponding to the plurality of power receiving devices 200 that transmitted the maximum load command signal. Each of P is sequentially acquired.

  In the first embodiment, the control unit 4 is configured to acquire category information from the new power receiving apparatus 200. Then, the control unit 4 is configured to transmit a load disconnection signal to at least one power receiving device 200 among the plurality of power receiving devices 200 and stop supplying power that is equal to or greater than the amount of power corresponding to the category information. ing. In the first embodiment, when acquiring the power value P corresponding to the new power receiving apparatus 200, the control unit 4 transmits a load disconnection signal to all of the plurality of power receiving apparatuses 200 that are supplying power. Is configured to do.

  Specifically, the control unit 4 is configured to determine that a new power receiving device 200 is placed on the upper surface 1 when the advertisement signal transmitted to establish communication by the power receiving device 200 is acquired. Yes. For example, when the smartphone 200b is newly placed on the upper surface 1 while the PC 200a is placed on the upper surface 1, an advertisement signal and category information (power category information) are transmitted from the smartphone 200b and controlled. The unit 4 acquires advertisement signal and category information.

  And after acquiring an advertisement signal, control part 4 performs control which transmits a maximum load command signal to PC200a and smart phone 200b one by one, respectively. Here, the control unit 4 transmits a maximum load command signal to the PC 200a and transmits a load disconnection signal to the smartphone 200b substantially simultaneously. Thereby, the power measuring unit 7 can measure only the power value P (this power value is set to P1) supplied to the PC 200a operating at the maximum load.

  The control unit 4 transmits a maximum load command signal to the smartphone 200b and transmits a load disconnection signal to the PC 200a substantially simultaneously. Thereby, the power measurement unit 7 can measure only the power value P (this power value is set to P2) to be supplied to the smartphone 200b operating at the maximum load.

  The control unit 4 is configured to perform control to acquire (calculate) a total value PS (PS1 = P1 + P2) of the acquired power values P (P1 and P2). Then, the control unit 4 compares the maximum power supply value PM, which is the maximum supply power value that can be supplied from the power supply unit 3 of the power supply apparatus 100 to the power supply antenna unit 2, and the total value PS (PS1). Configured to do.

  Then, when the total value PS1 is equal to or less than the maximum power supply power value PM, the control unit 4 performs control to supply power to all the power receiving devices 200 (PC 200a and smartphone 200b) corresponding to the total value PS1. It is configured. That is, the control unit 4 performs control to continue power supply to the PC 200a and to start power supply to the smartphone 200b.

  In addition, when the total value PS1 exceeds the maximum power supply power value PM, the control unit 4 other than the new power receiving device 200 (smart phone 200b) among the power receiving devices 200 (PC 200a and the smartphone 200b) corresponding to the total value PS1. The power receiving apparatus 200 (PC 200a) is configured to supply power.

  For example, when the control unit 4 determines that a new power receiving device 200 (multifunction watch 200c) is placed on the upper surface 1 in a state where power is supplied to the PC 200a and the smartphone 200b, Similar processing is performed. Specifically, the control unit 4 performs control to acquire the total value PS2 of the power values P of the PC 200a, the smartphone 200b, and the multi-function watch 200c.

  And the control part 4 continues electric power feeding with respect to all the power receiving apparatuses 200 (PC200a, smart phone 200b, and multi-function clock 200c) corresponding to total value PS2, when total value PS2 is below maximum electric power supply value PM. It is configured to perform control.

  In addition, when the total value PS2 exceeds the maximum power supply power value PM, the control unit 4 selects a new power receiving device 200 among the power receiving devices 200 (PC 200a, smartphone 200b, and multi-function watch 200c) corresponding to the total value PS2. The power receiving device 200 (PC 200a and smartphone 200b) other than the (multifunction watch 200c) is configured to supply power.

(Description of the configuration of the control unit using numerical examples)
Here, the power supply apparatus 100 is configured as class 2 (maximum power supply power value PM is 10 W) defined by the A4WP standard, and the PC 200 a and the smartphone 200 b are configured as category 3 (power consumption value is 6.5 W). An example of the case will be described. “Category 3” is an example of “power category information” in the claims.

  In this case, the power supply apparatus 100 has a maximum power supply power value PM of 10 W, and this maximum power supply power value PM is a total value 13 W (6.5 W + 6.5) of the power consumption values of the PC 200 a and the smartphone 200 b set in the category 3. The value is smaller than 5W).

  Here, in the first embodiment, the power feeding device 100 transmits the maximum load command signal to each of the power receiving devices 200 and also supplies the power values P supplied to the plurality of power receiving devices 200 that have transmitted the maximum load command signals. Based on the acquired power value P, the power supply availability determination control is performed.

  That is, the power supply apparatus 100 has, for example, a power value P1 supplied to the PC 200a in the state of operating at the maximum load of 4 W, and the power supplied to the smartphone 200b in the state of operating at the maximum load. When the value P2 is 3W, the total value PS1 is 7W. The total value PS1 is 10 W or less of the maximum power supply power value PM. In this case, the power supply apparatus 100 supplies power to both the PC 200a and the smartphone 200b at the same time regardless of the category and class.

(Configuration of power receiving device)
Next, the configuration of the power receiving device 200 will be described with reference to FIGS. 1 and 3. Note that the PC 200a, the smartphone 200b, and the multi-function watch 200c are configured as the power receiving device 200. In addition, in the PC 200a, the smartphone 200b, and the multi-function watch 200c, the components having the same reference numerals are assumed to be configured in the same manner, and the description thereof is omitted.

  As shown in FIG. 3, the PC 200a includes a power receiving antenna unit 201a, a load circuit 202a, a power receiving side control unit 203, a rectifier circuit 204, a load power circuit 205, a control power circuit 206, and a power receiving side. A communication unit 207 is provided.

  As shown in FIGS. 1 and 2, the smartphone 200b is provided with a power receiving antenna unit 201b and a load circuit 202b. The configuration of the smartphone 200b other than the power receiving antenna unit 201b and the load circuit 202b is the same as that of the PC 200a.

  As shown in FIGS. 1 and 2, the multi-function timepiece 200 c is provided with a power receiving antenna portion 201 c and a load circuit 202. The configuration of the multi-function timepiece 200c other than the power receiving antenna portion 201c and the load circuit 202c is the same as that of the PC 200a.

  The power receiving antenna unit 201a includes a power receiving coil 211a and a matching circuit 212a. The power receiving coil 211a is configured to receive power by being magnetically coupled to the power feeding coil 21. The matching circuit 212a includes a capacitor or the like, and the matching circuit 212a is configured to match the impedance on the rectifier circuit 204 side with the impedance of the power receiving coil 211. The matching circuit 212 is configured such that the power receiving antenna unit 201a is a resonance circuit having a resonance frequency substantially the same as the resonance frequency of the feeding antenna unit 2.

  Further, as shown in FIG. 1, the power receiving antenna portion 201b is provided with a power receiving coil having a size (diameter or side size) different from that of the power receiving coil 211a of the power receiving antenna portion 201a. Further, the power receiving antenna portion 201c is provided with a power receiving coil having a size (diameter or side size) different from that of the power receiving coil 211a of the power receiving antenna portion 201a and the power receiving coil of the power receiving antenna portion 201b.

  The load circuits 202a to 202c are configured, for example, as circuits that consume power in order to exhibit various functions of the power receiving device 200 (for example, functions as a smartphone in the case of the load 202b). In the first embodiment, when the load circuits 202a to 202c obtain a command for maximizing the load by the power receiving side control unit 203, the load circuits 202a to 202c maximize the size of the load (the amount of power consumed). Maximum).

  The rectifier circuit 204 includes a plurality of diodes and the like, and is configured to convert an alternating current received by the power receiving antenna 201a (the power receiving antenna unit 201b or 201c) into a direct current.

  Both the load power supply circuit 205 and the control power supply circuit 206 include a DC / DC converter and a smoothing circuit. The load power supply circuit 205 is configured to convert the voltage of power from the rectifier circuit 204 into a predetermined voltage suitable for driving the load circuit 202a. The load power supply circuit 205 is configured to supply the converted power to the load circuit 202a. The control power supply circuit 206 is configured to convert the voltage of the power from the rectifier circuit 204 into a predetermined voltage suitable for the power receiving side control unit 203. The control power supply circuit 206 is configured to supply the converted power to the power receiving side control unit 203.

  The power receiving side control unit 203 is configured to perform overall control of the power receiving apparatus 200. When receiving the maximum load command signal from the power supply apparatus 100 via the power receiving side communication unit 207, the power receiving side control unit 203 maximizes the load on the load circuit 202a (load circuit 202b or 202c). It is comprised so that control which transmits the command to perform may be performed.

  In addition, when the power receiving antenna unit 201a (power receiving antenna unit 201b or 201c) starts receiving power from the power feeding device 100, the power receiving side control unit 203 communicates with the power feeding device 100 via the power receiving side communication unit 207. It is configured to transmit an advertisement signal requesting establishment. In addition, the power reception side control unit 203 is configured to transmit identification information (ID (Identification)) and category information to the power feeding apparatus 100 via the power reception side communication unit 207 together with the advertisement signal. The identification information is set as information using a device name, for example.

  In addition, when power reception from the power supply apparatus 100 is stopped, the power reception side control unit 203 transmits a signal indicating that power reception has been stopped to the power supply apparatus 100 via the power reception side communication unit 207. It is configured. Note that the signal indicating that the power reception is stopped may be generated by, for example, configuring the power reception side control unit 203 to continuously transmit power reception information such as the power reception voltage value to the power supply apparatus 100. May be set as a signal indicating that has become substantially zero.

  Moreover, when the power receiving side control part 203 acquires the load cutting | disconnection signal from the electric power feeder 100, between the power receiving antenna part 201a (power receiving antenna part 201b or 201c) and the load circuit 202a (load circuit 202b or 202c). It is configured to perform control to stop power reception by disconnecting the connection.

  In addition, when the power receiving side control unit 203 acquires a load disconnection signal and acquires a load connection signal (or maximum load command signal) from the power supply apparatus 100 in a state where power reception is stopped, the disconnected circuit described above It is comprised so that control which connects may be performed. In addition, when the power receiving side control unit 203 acquires the load connection signal, the power receiving side control unit 203 performs control to cause the load circuit 202a (the load circuit 202b or 202c) to consume the received power with a load having a normal size (maximum or less). Configured to do.

  The power receiving side communication unit 207 is configured to perform wireless communication with the power supply apparatus 100 based on a predetermined standard (for example, Bluetooth (registered trademark) standard).

(Control processing for determining whether power can be supplied by the power supply device)
Next, with reference to FIG. 4, a control processing flow for determining whether or not power can be supplied by the power supply apparatus 100 according to the first embodiment will be described. The following control processing is executed by the control unit 4. Note that i is an integer variable. For example, the PC 200 a is the first power receiving device 200, the smartphone 200 b is the second power receiving device 200, and the multi-function timepiece 200 c is the third power receiving device 200. Further, it is assumed that before step S1, the power is being fed (a state where a feeding magnetic field is generated from the feeding antenna unit 2).

  First, in step S1, it is determined whether or not a new power receiving device 200 has been placed. Specifically, it is determined whether or not an advertisement signal is acquired from the power receiving apparatus 200. In step S1, category information (power category information) is acquired from the new power receiving apparatus 200. Then, this determination is repeated until an advertisement signal is acquired from the power receiving apparatus 200. If an advertisement signal is acquired from the power receiving apparatus 200, the process proceeds to step S2.

  In step S2, variable i is set to 1 (initialization of variable i). Thereafter, the process proceeds to step S3.

  In step S <b> 3, a load disconnection signal is transmitted to a power receiving device 200 other than the i-th power receiving device 200. At this time, the load disconnection signal may be transmitted to all the power receiving devices 200 other than the i-th power receiving device 200, or the minimum power for stopping the power of the amount corresponding to the category of the new power receiving device 200 The load disconnection signal may be transmitted only to the power receiving devices 200 (a plurality of power receiving devices 200). Thereafter, the process proceeds to step S4.

  In step S <b> 4, the maximum load command signal is transmitted to the i th power receiving apparatus 200. Thereafter, the process proceeds to step S5.

  In step S5, the power value Pi (for example, the power value supplied to the PC 200a with the maximum load is P1) is acquired. Then, it progresses to step S6.

  In step S6, it is determined whether or not the power value Pi corresponding to all the power receiving devices 200 has been acquired. Specifically, when three power receiving apparatuses 200 are mounted on the upper surface 1, the maximum value of i is 3. In this case, it is determined whether i is 3. If the power values Pi corresponding to all the power receiving apparatuses 200 have been acquired, the process proceeds to step S8, and if the power values Pi corresponding to all the power receiving apparatuses 200 have not been acquired, the process proceeds to step S7.

  In step S7, 1 is added to i. Then, it returns to step S3. That is, steps S <b> 3 to S <b> 7 are repeated until power values Pi corresponding to all the power receiving devices 200 placed on the upper surface 1 are acquired.

  In step S8, it is determined whether the total value PS of the power values Pi is equal to or less than the maximum power supply power value PM. If the total value PS of the power values Pi is less than or equal to the maximum power supply power value PM, the process proceeds to step S9. If the total value PS of the power values Pi is greater than the maximum power supply power value PM, the process proceeds to step S11.

  In step S <b> 9, the load connection signal is transmitted to all the power receiving devices 200 placed on the upper surface 1.

  In step S10, power is supplied. Thereafter, the control process for determining whether or not power can be supplied by the power supply apparatus 100 according to the first embodiment is terminated.

  In step S <b> 11 that proceeds when the total value PS of the power values Pi is larger than the maximum power supply power value PM in step S <b> 9, a load disconnection signal is transmitted to the newly placed power receiving apparatus 200. Thereafter, the process proceeds to step S12.

  In step S12, the load connection signal is transmitted to the power receiving device 200 other than the newly placed power receiving device 200. If there is no power receiving device 200 other than the newly placed power receiving device 200, the load connection signal is not transmitted and the process proceeds to step S10. In other words, power is not supplied to the newly placed power receiving apparatus 200, and power is supplied only to the placed power receiving apparatus 200 before the newly placed power receiving apparatus 200 is placed. Is done.

[Effect of the first embodiment]
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the power supply device 100 transmits the load disconnection signal to the power reception device 200 that supplies power via the communication unit 5, and then transmits the load disconnection signal. The power value P is acquired, and based on the acquired power value P, it is configured to determine whether to supply power to the new power receiving apparatus 200. As a result, it is possible to acquire the actual power value P to be fed to the new power receiving apparatus 200 and determine whether or not to feed power to the new power receiving apparatus 200 based on the actual power value P. As a result, since it is based on the actual power value P, the power that can be supplied is different from the case where it is determined whether or not to supply power to the new power receiving apparatus 200 by simply using the category of the new power receiving apparatus 200. Even when the value P has a margin, it is possible to suppress the determination that power is not supplied to the new power receiving apparatus 200. In addition, by transmitting a load disconnection signal to the power receiving device 200 that supplies power, when power is supplied to the new power receiving device 200 and the power value P is acquired, the power to be supplied is insufficient. It can be suppressed. As a result, an opportunity to supply power to the new power receiving apparatus 200 can be ensured more reliably. As a result, it is possible to supply power to more power receiving apparatuses 200.

  In the first embodiment, as described above, the power feeding antenna unit 2 is configured to supply power to the plurality of power receiving devices 200, and the control unit 4 acquires category information from the new power receiving device 200. In addition, a load disconnection signal is transmitted to at least one power receiving device 200 among the plurality of power receiving devices 200, and the supply of power equal to or greater than the amount of power corresponding to the category information is stopped. Thereby, when supplying power to the new power receiving apparatus 200 and acquiring the power value P, the supply of power equal to or more than the amount of power corresponding to the category information is stopped, so that the power to be supplied is insufficient. It can suppress more reliably.

  In the first embodiment, as described above, the control unit 4 transmits a load disconnection signal to all of the plurality of power receiving apparatuses 200 that supply power, and supplies power to the new power receiving apparatus 200. Then, the power value P is obtained. Accordingly, it is possible to simplify the control process as compared with the case where a part of the plurality of power receiving devices 200 that supply power is selected and transmit the load disconnection signal, and the new power receiving device 200 When supplying electric power and acquiring the electric power value P, it can further suppress that the electric power to supply becomes insufficiency.

  In the first embodiment, as described above, the control unit 4 transmits a maximum load command signal for instructing to operate with the maximum load to the power receiving device 200 via the communication unit 5 and the maximum load. The power value P supplied to the power receiving device 200 that has transmitted the command signal is acquired, and based on the acquired power value P, it is determined whether or not to supply power to the power receiving device 200 that has transmitted the maximum load command signal. It is configured to perform judgment control (see FIG. 4). Thus, the power value P supplied to the power receiving device 200 that has transmitted the maximum load command signal corresponds to the maximum value of the power value that is actually supplied to the power receiving device 200, and therefore, without using the category of the power receiving device 200, Based on the maximum power supply value PM and the maximum value (power value P) of the power value that is actually supplied to the power receiving apparatus 200, it can be determined whether or not to supply power to the power receiving apparatus 200. That is, when the power supply apparatus 100 is below the maximum power supply power value PM and the power value P actually supplied to the power reception apparatus 200 (when there is a margin in the power value that can be supplied), the power reception apparatus 200 Since it can suppress judging that electric power feeding is not performed, it can supply electric power to more power receiving apparatuses 200 by that much. Moreover, even when the load of the power receiving apparatus 200 becomes maximum, it is possible to suppress a state where power to be supplied is insufficient.

  In the first embodiment, as described above, the power feeding antenna unit 2 is configured to be able to supply power to the plurality of power receiving devices 200. Further, the control unit 4 transmits the maximum load command signal to each of the plurality of power receiving devices 200 and acquires the power values P supplied to the plurality of power receiving devices 200 that have transmitted the maximum load command signal. Based on the power value P, it is configured to perform power supply availability determination control (see FIG. 4). As a result, power supply availability determination control is performed for each of the plurality of power receiving apparatuses 200, and therefore, it is possible to suppress a shortage of power to be supplied even when the load on any power receiving apparatus 200 is maximized. Can do.

  In the first embodiment, as described above, the control unit 4 acquires the power values P supplied to the plurality of power receiving apparatuses 200 that have transmitted the maximum load command signal, and the total value of the acquired power values P. When PS is equal to or less than the maximum power supply power value PM, which is the maximum power value that can be supplied from the power supply unit 3, control is performed to supply power to all the power receiving devices 200 that have transmitted the maximum load command signal. . Accordingly, by comparing the acquired total value PS of the power values P with the maximum power supply power value PM, even when power is supplied to the plurality of power receiving apparatuses 200, it is possible to easily perform power supply availability determination control.

  In the first embodiment, as described above, the control unit 4 sequentially transmits the maximum load command signal to each of the plurality of power receiving devices 200 and supports the plurality of power receiving devices 200 that have transmitted the maximum load command signal. The power values P to be acquired are sequentially acquired. Thereby, unlike the case where all the power values P corresponding to the plurality of power receiving apparatuses 200 are acquired at the same time, even if the total value PS of the acquired power values P exceeds the maximum power supply power value PM, it is easily acquired. The total value PS of the power values P can be acquired.

[Second Embodiment]
Next, with reference to FIG. 5 and FIG. 6, the structure of the electric power feeder 300 by 2nd Embodiment is demonstrated. The power feeding device 300 according to the second embodiment is configured to acquire identification information (ID (Identification)) from the power receiving device 200 via the communication unit 5 and to acquire the impedance Z of the power feeding antenna unit 2. . In addition, about the structure same as the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

(Configuration of Power Supply Device According to Second Embodiment)
As illustrated in FIG. 5, the power supply apparatus 300 according to the second embodiment includes a control unit 304, a storage unit 306, and an impedance measurement unit 308.

  Here, in the second embodiment, the control unit 304 acquires the identification information from the power receiving device 200 via the communication unit 5, and the newly acquired identification information is acquired in advance in the storage unit 306. The identification information included in the stored management table 306a), it corresponds to the newly acquired identification information without transmitting the maximum load command signal to the power receiving apparatus 200 corresponding to the newly acquired identification information. The power receiving apparatus 200 is configured to perform control to supply power. Further, the control unit 304 is configured to perform power supply availability determination control (see FIG. 4) when the newly acquired identification information is not the same as the previously acquired identification information.

  In the second embodiment, the impedance measuring unit 308 is configured to measure the impedance Z of the feeding antenna unit 2. And the control part 304 respond | corresponds to the newly acquired identification information with respect to the impedance Z corresponding to the identification information acquired previously when the newly acquired identification information is the same as the identification information acquired previously. When the change amount V of the measured value of the impedance Z is larger than a threshold value Vt1 (for example, 5Ω), the power supply availability determination control (see FIG. 4) is performed. The threshold value Vt1 is an example of the “first threshold value” in the claims.

  Specifically, the power reception device 200 is configured to transmit an advertisement signal and identification information to the power supply device 300 via the power reception side communication unit 207 in response to the start of power reception. The identification information is set as information using a device name, for example. The control unit 304 is configured to acquire an advertisement signal and identification information from the power receiving device 200.

  The control unit 304 is configured to measure the impedance Z of the power feeding antenna unit 2 by the impedance measurement unit 308 after acquiring the identification information from the power receiving device 200. Then, as illustrated in FIG. 6, the control unit 304 is configured to associate the identification information acquired from the power receiving device 200 with the measured impedance Z and store the information in the storage unit 306 as a management table 306 a. . Note that the control unit 304 is configured to measure the impedance Z at every predetermined time interval (for example, 1 second) by the impedance measurement unit 308 while power is being supplied to the power receiving device 200.

  Here, with reference to FIG. 6, the management table 306a (table of correspondence between identification information and impedance Z) stored in the storage unit 306 will be described. For example, the identification information of the PC 200a is ID1, the identification information of the smartphone 200b is ID2, and the identification information of the multi-function watch 200c is ID3.

  When power is supplied to the PC 200a and the smartphone 200b (when the PC 200a and the smartphone 200b are placed on the upper surface 1), the control unit 304 is supplying power to the identification information ID1 and ID2 and the PC 200a and the smartphone 200b. The impedance Z1 at is acquired. Then, the control unit 304 stores the identification information ID1 and ID2 and the impedance Z1 in association with each other in the storage unit 306.

  When the user removes the PC 200a from the range of the power supply magnetic field of the power supply apparatus 300 to the outside of the range (from the upper surface 1), power supply from the power supply apparatus 300 to the PC 200a is stopped. At this time, the PC 200a is configured to transmit a signal indicating that the power reception is stopped to the power supply apparatus 100 via the power reception side communication unit 207. After that, when the PC 200a is returned from the outside of the power supply magnetic field of the power supply apparatus 300 to the range (mounted on the upper surface 1), the advertisement signal and the identification information ID1 are transmitted from the PC 200a to the power supply apparatus 300. .

  When the control unit 304 newly acquires the advertisement signal and the identification information ID1, the control unit 304 refers to the identification information stored in the storage unit 306 as the management table 306a. In this case, since the management table 306a is stored in the storage unit 306 in a state in which the identification information ID1 and ID2 and the impedance Z1 are associated with each other, the control unit 304 stores the newly acquired identification information ID1. Control is performed to determine that the identification information is the same as the previously acquired identification information ID1 (identification information included in the management table 306a stored in the storage unit 306). In this case, for example, as illustrated in FIG. 6, the control unit 304 can identify ID1 (second time) as shown in FIG. 6 in order to distinguish the identification information ID1 acquired second time from the identification information ID1 acquired first time. May be stored as

  And the control part 304 acquires the impedance Z2 during the electric power feeding with respect to PC200a and the smart phone 200b. The control unit 304 stores the identification information ID1 (second time) and ID2 in association with the impedance Z2 in the storage unit 306.

  Then, when the change amount V (= | Z2-Z1 |) of the newly acquired impedance Z2 with respect to the impedance Z1 is larger than the threshold value Vt1, the control unit 304 determines whether or not to supply power (see FIG. 4). I do. In addition, when the change amount V (= | Z2−Z1 |) of the newly acquired impedance Z2 with respect to the impedance Z1 is equal to or less than the threshold value Vt1, the control unit 304 performs power supply availability determination control (see FIG. 4). Without performing, control which continues electric power feeding to PC200a and smart phone 200b is performed.

  That is, the control unit 304 measures the change amount V of the impedance Z, whereby the PC 200a is temporarily removed from the power supply apparatus 300 and placed again (placement position, placement direction, etc.). ) Is performed to detect the change.

  Here, when the placement of the power receiving device 200 with respect to the power feeding device 300 changes, the coupling coefficient changes and the impedance Z changes. In this case, the magnitude of the power value P supplied to the power receiving device 200 that is operating at the maximum load changes. Therefore, the control unit 304 can appropriately determine whether or not it is necessary to perform power supply availability determination control by measuring the change amount V of the impedance Z.

  Note that, as shown in FIG. 6, the control unit 304 also obtains the identification information ID3 as well as the impedance Z3 (the smartphone 202b is connected to the smartphone 202b) even when the multi-function timepiece 200c is newly placed on the upper surface 1. (When not placed) and Z4 (when the smartphone 202b is placed) are acquired and stored in the storage unit 306.

  Moreover, the other structure of the electric power feeder 300 by 2nd Embodiment is the same as that of the electric power feeder 100 in 1st Embodiment.

(Execution Judgment Control Processing of Power Supply Device Judgment Control for Power Supply Device According to Second Embodiment)
Next, an execution determination control process flow of power supply availability determination control by the power supply apparatus 300 according to the second embodiment will be described with reference to FIG. The following control processing is executed by the control unit 304. Before step S101, it is assumed that power is being fed (a state where a feeding magnetic field is generated from the feeding antenna unit 2).

  First, in step S101, the impedance Z is measured. For example, when power is supplied from the power supply apparatus 300 to the PC 200a and the smartphone 200b, the impedance Z1 is acquired as illustrated in FIG. Thereafter, the process proceeds to step S102.

  In step S102, it is determined whether the power receiving apparatus 200 has been removed. That is, it is determined whether or not a signal indicating that power reception has been stopped is obtained from any of the plurality of power receiving apparatuses 200. If the power receiving apparatus 200 has been removed, the process proceeds to step S104. If the power receiving apparatus 200 has not been removed, the process proceeds to step S103.

  In step S103, the impedance Z is overwritten and stored. That is, when the power receiving apparatus 200 is not removed, the measured impedance Z is stored in the storage unit 306 as, for example, the impedance Z1. Then, it returns to step S101.

  In step S104, the impedance Z is stored. For example, the measured impedance Z is stored in the storage unit 306 as the impedance Z1. Thereafter, the process proceeds to step S105.

  In step S105, it is determined whether or not a new power receiving apparatus 200 has been placed. That is, it is determined whether or not a new advertisement signal has been acquired. This determination is repeated until a new power receiving apparatus 200 is placed. If a new power receiving apparatus 200 is placed, the process proceeds to step S106. In step S105, the impedance Z may be repeatedly measured and stored in the storage unit 306 at predetermined time intervals until a new power receiving device 200 is mounted.

  In step S106, identification information is acquired from the newly placed power receiving apparatus 200. Thereafter, the process proceeds to step S107.

  In step S107, it is determined whether or not the newly acquired identification information is the same as the identification information (identification information acquired in advance) included in the management table 306a stored in the storage unit 306. If the newly acquired identification information is the same as the previously acquired identification information, the process proceeds to step S108. If the newly acquired identification information is not the same as the previously acquired identification information, the process proceeds to step S111. .

  In step S108, the impedance Z is measured. For example, as shown in FIG. 6, when the PC 200a (identification information ID1) is temporarily removed and the PC 200a is placed on the power supply apparatus 300 again, the impedance Z2 is measured. Thereafter, the process proceeds to step S109.

  In step S109, it is determined whether or not the change amount V (= | Z2-Z1 |) of the impedance Z is larger than the threshold value Vt1. When the change amount V is larger than the threshold value Vt1, the process proceeds to step S111. When the change amount V is equal to or less than the threshold value Vt1, the process proceeds to step S110.

  In step S110, power feeding is continued. That is, power supply is continued without performing power supply availability determination control (see FIG. 4). Then, it returns to step S101.

  When the identification information newly acquired in step S107 is not the same as the identification information acquired in advance, or in step S111 that proceeds when the change amount V is larger than the threshold value Vt1 in step S109, the power supply availability determination control (FIG. 4). That is, when the power receiving apparatus 200 is temporarily removed from the power supply apparatus 300, the newly acquired identification information is not the same as the previously acquired identification information, and the change amount V is greater than the threshold value Vt1. When it is larger, power supply availability determination control (see FIG. 4) is performed.

[Effects of Second Embodiment]
In the second embodiment, the following effects can be obtained.

  In the second embodiment, as described above, the control unit 304 acquires the identification information from the power receiving device 200 via the communication unit 5, and the identification information (storage unit) in which the newly acquired identification information is acquired in advance. Identification information included in the management table 306a stored in 306), the newly acquired identification information is transmitted without transmitting the maximum load command signal to the power receiving apparatus 200 corresponding to the newly acquired identification information. It is configured to perform control for supplying power to the power receiving device 200 corresponding to the above. As a result, when the power receiving apparatus 200 is temporarily removed from the power supply apparatus 300 and the power supply is temporarily stopped and then the same power receiving apparatus 200 is placed in the power supply apparatus 300 again, the determination is made based on the identification information. By doing so, power feeding can be resumed without performing power feeding availability determination control (see FIG. 4). That is, it is possible to quickly resume power supply to the power receiving apparatus 200 because it is not necessary to perform power supply availability determination control.

  Moreover, in 2nd Embodiment, the impedance measurement part 308 which measures the impedance Z of the electric power feeding antenna part 2 is provided in the electric power feeder 300 as mentioned above. Further, the control unit 304 determines that the newly acquired identification information is the same as the previously acquired identification information (identification information included in the management table 306a stored in the storage unit 306) and has been acquired in advance. When the change amount V of the impedance Z corresponding to the newly acquired identification information with respect to the impedance Z corresponding to the identification information is larger than the threshold value Vt1, power supply availability determination control (see FIG. 4) is performed. To do. Thereby, after the power receiving apparatus 200 is temporarily removed from the power feeding apparatus 300 and power feeding is temporarily stopped, when the same power receiving apparatus 200 is disposed in the power feeding apparatus 300 again, the placement and the like change. Thus, even when the coupling coefficient (power feeding efficiency) changes, by obtaining the change amount V of the impedance Z, it is possible to detect a change in the placement or the like (change in the coupling coefficient (power feeding efficiency)). As a result, when the placement of the power receiving apparatus 200 or the like changes (the coupling coefficient (power supply efficiency) changes), it is possible to appropriately determine whether or not power can be supplied by performing power supply availability determination control.

  Other effects of the power supply apparatus 300 according to the second embodiment are the same as those of the power supply apparatus 100 according to the first embodiment.

[Third Embodiment]
Next, with reference to FIG. 8, the structure of the electric power feeder 400 by 3rd Embodiment is demonstrated. The power supply apparatus 400 according to the third embodiment is configured to perform control for causing the user to notify the user that the display unit 401 requests correction of how to place the power reception apparatus 200. In addition, about the structure same as the said 1st Embodiment or the said 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

(Configuration of the power feeding device according to the third embodiment)
As illustrated in FIG. 8, the power supply apparatus 400 according to the third embodiment includes a storage unit 306, an impedance measurement unit 308, a display unit 401, and a control unit 404. The display unit 401 is an example of the “notification unit” in the claims.

  Here, in the third embodiment, the display unit 401 is configured to notify the user of the information by displaying the information. In addition, the control unit 404 corresponds to the newly acquired identification information for the impedance Z corresponding to the previously acquired identification information when the newly acquired identification information is the same as the previously acquired identification information. When the increase amount of the impedance Z is greater than or equal to a threshold value Vt2 (for example, 5Ω), the display unit 401 controls the display unit 401 to display and notify the user that the power receiving device 200 needs to be corrected. It is configured. The threshold value Vt2 is an example of the “second threshold value” in the claims.

  Specifically, the display unit 401 is configured by, for example, a liquid crystal panel or the like, and is configured to display characters, graphics, and the like based on a command from the control unit 404.

  Similarly to the control unit 304 of the power supply apparatus 300 according to the second embodiment, the control unit 404 removes the power receiving apparatus 200 and places the power receiving apparatus 200 again, for example, newly acquired identification information (for example, It is determined whether or not the identification information (ID1) is the same as the previously acquired identification information (identification information of the management table 306a stored in the storage unit 306). Then, the control unit 404 acquires an impedance Z (for example, impedance Z4) corresponding to the newly acquired identification information.

  Then, when the newly acquired identification information (for example, ID1) is the same as the previously acquired identification information (for example, ID1), the control unit 404 uses the previously acquired identification information (ID1). Whether or not the increase amount (Z4−Z1) of the impedance Z4 corresponding to the newly acquired identification information with respect to the corresponding impedance Z (eg, impedance Z1) is equal to or greater than the threshold value Vt2 (Z4−Z1 ≧ Vt2). to decide. Then, when Z4−Z1 ≧ Vt2, the control unit 404 uses the display unit 401 to request, for example, correction of placement, “Please correct the placement or placement position of the power receiving device”. It is configured to perform control to display characters.

  Moreover, the other structure of the electric power feeder 400 by 3rd Embodiment is the same as that of the electric power feeder 100 in 1st Embodiment.

(Notification control processing for correcting the placement of the power feeding device according to the third embodiment)
Next, with reference to FIG. 9, a description will be given of a notification control processing flow for correcting the placement by the power supply apparatus 400 of the third embodiment. The following control processing is executed by the control unit 404. In addition, the same code | symbol (step number) is attached | subjected to the process similar to the execution determination process (refer FIG. 7) of the electric power feeding availability determination control by the electric power feeder 300 of 2nd Embodiment, and description is abbreviate | omitted.

  First, in steps S101 to S107 and step S111, processing similar to execution determination processing (see FIG. 7) of power supply availability determination control by the power supply apparatus 300 of the second embodiment is performed. In the third embodiment, the newly acquired identification information (for example, ID1) is the same as the previously acquired identification information (identification information of the management table 306a stored in the storage unit 306) in step S107. In the case, the process proceeds to step S201.

  In step S201, impedance Z (for example, impedance Z4) is measured. Thereafter, the process proceeds to step S202.

  In step S202, it is determined whether or not the increase amount (Z4-Z1) of the impedance Z is equal to or greater than the threshold value Vt2. That is, it is determined whether Z4−Z1 ≧ Vt2. If the increase amount (Z4-Z1) of the impedance Z is equal to or greater than the threshold value Vt2, the process proceeds to step S203, and the increase amount (Z4-Z1) of the impedance Z is less than the threshold value Vt2 (Z4-Z1 < In the case of Vt2), the process proceeds to step S204.

  In step S <b> 203, the display unit 401 displays a message requesting the user to correct how to place the power receiving device 200. Thereafter, the process returns to step S201. That is, steps S201 to S203 are repeated until the increase amount of impedance Z (Z4-Z1) becomes less than threshold value Vt2.

  In step S204, power feeding is continued. Then, it returns to step S101.

[Effect of the third embodiment]
In the third embodiment, the following effects can be obtained.

  In 3rd Embodiment, the display part 401 which alert | reports information to a user is provided in the electric power feeder 400 as mentioned above. In addition, the control unit 404 makes a newly acquired identification for the impedance Z (impedance Z1) corresponding to the previously acquired identification information when the newly acquired identification information is the same as the previously acquired identification information. When the increase amount (Z4−Z1) of the impedance Z (impedance Z4) corresponding to the information is equal to or greater than the threshold value Vt2 (Z4−Z1 ≧ Vt2), the display unit 401 allows the user to place the power receiving device 200. It is configured to perform control for notifying that the correction is requested. Thereby, when the power receiving apparatus 200 is temporarily removed from the power supply apparatus 400 and the power supply is temporarily stopped and then the power reception apparatus 200 is disposed in the power supply apparatus 400 again, the placement method is changed, Even when the coupling coefficient (power supply efficiency) changes, the display unit 401 can notify the user that the placement method is to be corrected. As a result, power can be supplied with high efficiency.

  The other effects of the power supply apparatus 400 according to the third embodiment are the same as those of the power supply apparatus 100 according to the first embodiment.

[Fourth Embodiment]
Next, with reference to FIG. 10, the structure of the power receiving apparatus 500 by 4th Embodiment is demonstrated. In the power receiving device 500 according to the fourth embodiment, a maximum load operation unit 501 and a switch unit 502 are provided separately from the load circuit 202a. The power receiving device 500 according to the fourth embodiment can also be configured as a power feeding system that operates corresponding to the power feeding device 100 according to the first embodiment. In addition, about the same structure as the said 1st-3rd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

(Configuration of Power Receiving Device According to Fourth Embodiment)
As shown in FIG. 10, the power receiving device 500 according to the fourth embodiment is provided with a maximum load operation unit 501, a switch unit 502, and a power receiving side control unit 503.

  Here, in the fourth embodiment, the maximum load operation unit 501 and the switch unit 502 are provided separately from the load circuit 202a. The maximum load operation unit 501 is composed of, for example, a resistive load, and is provided between the rectifier circuit 204, the load power supply circuit 205, and the control power supply circuit 206. Moreover, the load circuit 202a consists of a battery.

  The switch unit 502 has one end connected to the maximum load operation unit 501 and the other end grounded. Then, the switch unit 502 connects one end and the other end based on a command from the power receiving side control unit 503, disconnects the state where the maximum load operation unit 501 is grounded, and disconnects the one end and the other end. The load operation unit 501 is configured to switch between a state where the load operation unit 501 is not grounded.

  When the maximum load operation unit 501 is grounded, a current flows through the maximum load operation unit 501 so that the power receiving apparatus 500 is in a state where power is consumed by the maximum load. Further, the maximum load operation unit 501 is configured so that a current does not substantially flow through the maximum load operation unit 501 when not grounded. In this case, in the power receiving device 500, the load circuit 202a operates (is charged). ) Minutes, power is consumed.

  Moreover, in 4th Embodiment, when the power receiving side control part 503 acquires the maximum load command signal from the electric power feeder 100 (refer FIG. 2), the switch part 502 is connected and the maximum load operation | movement part 501 is carried out, The power receiving device 500 is configured to perform control so that power is consumed by the maximum load.

  The power supply apparatus 100 is configured to perform power supply availability determination control (see FIG. 4) based on the power value P supplied to the power reception apparatus 500.

  Moreover, the other structure of the power receiving apparatus 500 by 4th Embodiment is the same as that of the power receiving apparatus 200 in 1st Embodiment.

[Effect of Fourth Embodiment]
In the fourth embodiment, the following effects can be obtained.

  In the fourth embodiment, as described above, the power receiving device 500 is provided with the maximum load operation unit 501 and the switch unit 502 separately from the load circuit 202a. In addition, when the power receiving side control unit 503 acquires the maximum load command signal from the power supply apparatus 100 (see FIG. 2), the switch unit 502 is connected, and the maximum load operating unit 501 causes the power receiving apparatus 500 to It is configured to perform control so that power is consumed by the load. Here, when the load circuit 202a is formed of a battery, the magnitude of the load changes depending on the remaining capacity of the battery. It may be difficult to get into a state. Therefore, the power receiving device 500 is provided with the load circuit 202a that is difficult to achieve the maximum load state by providing the maximum load operation unit 501 and the switch unit 502 separately from the load circuit 202a. Even in such a case, the power receiving apparatus 500 can be set to a maximum load state. As a result, the power feeding apparatus 100 transmits the maximum load command signal to the power receiving apparatus 500 provided with the load circuit 202a (battery) that is difficult to achieve the maximum load state in addition to the power receiving apparatus 200. Thus, power supply availability determination control (see FIG. 4) can be performed, so that the versatility of the power supply apparatus 100 can be improved.

  The other effects of the power supply apparatus 500 according to the fourth embodiment are the same as those of the power supply apparatus 100 according to the first embodiment.

[Modification]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above first to fourth embodiments, an example in which a PC, a smartphone, and a multi-function watch are used as the power receiving device has been described. For example, a transportation device such as an electric vehicle may be used as the power receiving device. In this case, the power supply apparatus may be configured as a power supply station for transport equipment.

  Moreover, in the said 1st-4th embodiment, although the example which provides one electric power feeding antenna part in a electric power feeder was shown, this invention is not limited to this. That is, a plurality of power feeding antenna units may be provided in the power feeding device, and the power feeding device may be configured to feed power from each power feeding antenna unit to the power receiving device. For example, like the power supply device 600 of the first modification shown in FIGS. 11 and 12, the power supply device 600 is provided with a plurality (four) of power supply antenna units 602, and the power supply device 600 is connected to each of the power supply antenna units. The power receiving apparatus 200 may be configured to supply power from 602.

  Here, as shown in FIG. 11, the power supply apparatus 600 according to the first modification includes a power supply apparatus main body 601 and four power supply antenna units 602. The power feeding device main body 601 and the four power feeding antenna units 602 are connected by four cables 603. The power feeding device 600 is configured to feed power to the power receiving device 200 disposed in the vicinity of the power feeding antenna unit 602.

  As illustrated in FIG. 12, the power supply apparatus 600 includes a power distribution unit 605 between the power supply unit 3 and the power supply antenna unit 602. The power distribution unit 605 is constituted by, for example, a transformer whose primary side is connected in series. The power distribution unit 605 is configured to distribute and supply power from the power supply unit 3 to the feeding antenna unit 602.

  The power feeding apparatus 600 is provided with four power measuring units 607. The four power measurement units 607 are respectively disposed between the power distribution unit 605 and the four feeding antenna units 602. Accordingly, the power feeding device 600 is configured to be able to acquire the power values P of the four power feeding antenna units 602.

  The power supply device 600 is provided with a control unit 604. The control unit 604 acquires the power value P supplied to the power receiving device 200 that has transmitted the maximum load command signal, and based on the acquired power value P. Thus, power supply availability determination control (see FIG. 4) is performed.

  In the second embodiment and the third embodiment, an impedance measurement unit is provided in the power feeding device, and the control unit is configured when the newly acquired identification information is the same as the previously acquired identification information, and When the change amount V of the impedance Z corresponding to the newly acquired identification information with respect to the impedance Z corresponding to the identification information acquired in advance is larger than the threshold value Vt1, control is performed so as to perform power supply availability determination control. Although the example (refer FIG. 7) comprised in this way was shown, this invention is not restricted to this. For example, as in the power supply apparatus 700 of the second modification shown in FIGS. 13 and 14, the control unit 704 is used when the newly acquired identification information is the same as the previously acquired identification information and acquired in advance. Change amount of the power value P supplied from the power supply unit 3 to the power supply antenna unit 2 corresponding to the newly acquired identification information with respect to the power value P supplied from the power supply unit 3 to the power supply antenna unit 2 corresponding to the identification information When PV is larger than the threshold value Pt, power supply availability determination control (see FIG. 4) may be performed. The threshold value Pt is an example of the “third threshold value” in the claims.

  Here, as shown in FIGS. 13 and 14, a power supply apparatus 700 according to the second modification includes a control unit 704 and a storage unit 706. The control unit 704 is the case where the newly acquired identification information (ID1) is the same as the previously acquired identification information (identification information included in the management table 706a stored in the storage unit 706). In addition, the power supply unit 3 corresponding to the newly acquired identification information corresponding to the power value P (referred to as P11) supplied from the power supply unit 3 corresponding to the previously acquired identification information to the power supply antenna unit 2 is supplied to the power supply antenna unit 2. When the variation PV (= | P12−P11 |) of the supplied power value P (assumed to be P12) is larger than the threshold value Pt (| P12−P11 |> Pt), the power supply possibility determination control ( (See FIG. 4).

  As a result, the power supply device 700 can determine whether or not to perform power supply availability determination control (see FIG. 4) using the power measurement unit 7 provided in advance in the power supply device 700, so that the impedance Z is Unlike the case of measuring and determining whether or not to perform power supply availability determination control (see FIG. 5), it is not necessary to provide an impedance measurement unit. As a result, the power supply device 700 can be prevented from being complicated because the power supply device 700 does not need to be provided with an impedance measurement unit.

  Moreover, in the said 3rd Embodiment, although the example which uses a display part as an alerting | reporting part of a claim was shown, this invention is not limited to this. For example, an audio output unit may be used as the notification unit. In this case, the voice output unit notifies the user that the user is requested to correct how to place the power receiving apparatus by outputting voice.

  In the first to fourth embodiments, for convenience of explanation, the processing of the control unit of the present invention has been described using a flow-driven flowchart in which processing is performed in order along the processing flow. Not limited to. In the present invention, the processing operation of the control unit may be performed by event-driven (event-driven) processing that executes processing for each event. In this case, it may be performed by a complete event drive type or a combination of event drive and flow drive.

  In the first embodiment, the control unit is configured to sequentially transmit the maximum load command signal to all of the plurality of power receiving apparatuses. However, the present invention is not limited to this. That is, if the control unit is configured to transmit a load disconnection signal to at least one power receiving device among the plurality of power receiving devices, and stop supplying power that exceeds the amount of power corresponding to the category information. Good.

2, 602 Feed antenna unit 3 Power supply unit 4, 304, 404, 604 Control unit 5 Communication unit 7, 607 Power measurement unit 100, 300, 400, 600, 700 Power feeding device 200, 500 Power receiving device 200a PC (power receiving device)
200b Smartphone (power receiving device)
200c Multifunction watch (power receiving device)
308 Impedance measurement unit 401 Display unit (notification unit)

Claims (12)

A power supply,
A power feeding antenna unit that supplies power from the power source unit to a power receiving device;
A power measuring unit for measuring a power value of the power;
A communication unit that communicates with the power receiving device;
After transmitting the load disconnection signal to the power receiving device that is supplying the power via the communication unit, and transmitting the load disconnection signal, the power value is acquired, and the acquired power value is obtained. And a control unit that determines whether or not to supply power to the new power receiving device. The power feeding antenna unit is configured to supply the power to a plurality of the power receiving devices,
The control unit acquires power category information from the new power receiving device and transmits the load disconnection signal to at least one power receiving device of the plurality of power receiving devices to correspond to the power category information. The power feeding device according to claim 1, wherein the power feeding device is configured to stop the supply of the electric power that is equal to or greater than the amount of electric power.   The control unit transmits the load disconnection signal to all of the plurality of power receiving devices that supply the power, supplies the power to the new power receiving device, and acquires the power value. The power feeding device according to claim 1 or 2, wherein the power feeding device is configured.   The control unit transmits a maximum load command signal instructing to operate with a maximum load to at least one of the new power receiving device and the power receiving device supplying the power, and the acquired The power supply device according to any one of claims 1 to 3, wherein the power supply device is configured to determine whether to supply power to the new power receiving device based on a power value. The power feeding antenna unit is configured to be able to supply the power to a plurality of the power receiving devices,
The control unit transmits the maximum load command signal to the new power receiving device and each of the plurality of power receiving devices that supply the power, and the power receiving device that has transmitted the maximum load command signal. 5. The power feeding according to claim 4, wherein each of the power values fed to the power supply is acquired, and based on the acquired power values, it is determined whether or not to supply power to the new power receiving device. apparatus.   The control unit acquires each of the power values supplied to the power receiving device that has transmitted the maximum load command signal, and the total value of the acquired power values is the maximum value of the power value that can be supplied from the power supply unit 6. The power feeding according to claim 5, wherein the power feeding is configured to perform power feeding to the new power receiving device and the power receiving device that is supplying the power when the power is equal to or less than a maximum power feeding power value. apparatus.   The control unit sequentially transmits the maximum load command signal to each of the new power receiving device and the plurality of power receiving devices that supply the power, and the new power receiving device and the power. The power feeding device according to claim 5 or 6, wherein each of the power values corresponding to the power receiving devices being supplied is sequentially acquired.   The control unit acquires identification information from the new power receiving device via the communication unit, and the identification information acquired from the new power receiving device is the same as the previously acquired identification information. Is configured to perform control to supply power to the new power receiving device without transmitting the maximum load command signal to the new power receiving device. Power supply device. An impedance measuring unit for measuring the impedance of the feeding antenna unit;
The control unit is the case where the identification information acquired from the new power receiving apparatus is the same as the identification information acquired in advance, and the measurement value of the impedance corresponding to the identification information acquired in advance When the amount of change in the measured value of the impedance corresponding to the identification information acquired from the new power receiving device is larger than the first threshold value, the maximum load command signal is transmitted to the new power receiving device. The power feeding device according to claim 8, configured as described above. It further includes a notification unit that notifies the user of information,
The control unit is the case where the identification information acquired from the new power receiving apparatus is the same as the identification information acquired in advance, and the measurement value of the impedance corresponding to the identification information acquired in advance When the amount of increase in the measured value of the impedance corresponding to the identification information acquired from the new power receiving device is equal to or greater than a second threshold value, the notification unit causes the user to place the new power receiving device. The power feeding device according to claim 9, wherein the power feeding device is configured to perform control for notifying that the correction is requested.   The control unit is the case where the identification information acquired from the new power receiving apparatus is the same as the identification information acquired in advance, and from the power supply unit corresponding to the identification information acquired in advance from the power feeding antenna The amount of change in the power value supplied from the power supply unit to the power supply antenna unit corresponding to the identification information acquired from the new power receiving device with respect to the power value supplied to the power supply unit is a third threshold. The power feeding device according to claim 8, configured to transmit the maximum load command signal to the new power receiving device when larger than a value. Supply power from the power supply to the power receiving device from the power supply device,
Transmitting a load disconnection signal to the power receiving device supplying the power from the power supply device;
After transmitting the load disconnect signal, measuring and obtaining the power value of the power,
A power supply method for determining whether to supply power to a new power receiving device based on the acquired power value.

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