WO2015064132A1 - Power transmitting device, power receiving device, and wireless power transmission system - Google Patents

Power transmitting device, power receiving device, and wireless power transmission system Download PDF

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Publication number
WO2015064132A1
WO2015064132A1 PCT/JP2014/063098 JP2014063098W WO2015064132A1 WO 2015064132 A1 WO2015064132 A1 WO 2015064132A1 JP 2014063098 W JP2014063098 W JP 2014063098W WO 2015064132 A1 WO2015064132 A1 WO 2015064132A1
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WO
WIPO (PCT)
Prior art keywords
power
transmission
value
device
power value
Prior art date
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PCT/JP2014/063098
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French (fr)
Japanese (ja)
Inventor
康一郎 中瀬
明 宮田
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日本電気株式会社
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Publication date
Priority to JP2013225010 priority Critical
Priority to JP2013-225010 priority
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Publication of WO2015064132A1 publication Critical patent/WO2015064132A1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/022Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter
    • H02J7/025Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter using non-contact coupling, e.g. inductive, capacitive
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J17/00Systems for supplying or distributing electric power by electromagnetic waves
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/0025Near field system adaptations
    • H04B5/0037Near field system adaptations for power transfer

Abstract

Provided is a power transmitting device (1) having: a power transmitting unit (2) that includes a power transmission sheet (7) and inputs power to the power transmission sheet (7); a power transmission control unit (3) for controlling a process of inputting power to the power transmission sheet (7) by the power transmitting unit (2); and a power transmission-side communication unit (4) for receiving information transmitted from a power receiving device (20). The power transmission control unit (3) controls the power transmitting unit (2) to allow the power transmitting unit (2) to input the power having a first power value to the power transmission sheet (7). Subsequently, when the power transmission-side communication unit (4) receives power value information indicating the power value received by the power receiving device (20), the power transmission control unit (3) compares the received power value indicated by the power value information with an expected received power value indicating an expected power value to be received by the power receiving device (20) having a predetermined positional relationship with the power transmission sheet (7) to which the power having the first power value is input. When the power transmission control unit (3) determines that the difference between the received power value and the expected received power value is smaller than a predetermined level, the power transmission control unit (3) allows the power transmitting unit (2) to input the power having a power value larger than the first power value to the power transmission sheet (7).

Description

Power transmitting device, a power receiving apparatus and wireless power transmission system

The present invention, the power transmitting device, a power receiving apparatus and wireless power transmission system.

An example of a transmission control method of a conventional wireless power transmission system is shown in Patent Document 1. Wireless power transmission system of Patent Document 1 is a type of system for transferring power between transmitting and receiving coils in a state where the power transmission device are in close contact to the power receiving device. The system, from the standpoint of reliability, recognizing that before the start of the transmission is an authorized receiving device, for the power receiving device or a foreign matter out of the standard controlled not to transmit the power.

The system shown in Patent Document 1 to perform the intermittent temporary power transmission to the power transmitting device. The power transmission device, by detecting the response of the power receiving device that has received temporary power transmission, and automatically detects that the power receiving apparatus is installed in a location that can be powered. When detecting the installation of the power receiving device, the power transmitting device performs a continuous normal power transmission with respect to the power receiving device. On the other hand, does not detect the installation of the power receiving device, the power transmitting device does not start the normal power transmission, to continue the initial state.

Patent Document 2 and Non-Patent Document 1, another example of a wireless power transmission system is shown.

This system is a system for propagating an electromagnetic wave with an electromagnetic wave propagation sheet. It shows an example of communication by transmitting the Patent Document 2 mainly signals, it is possible to charge the power supply or the battery of the electronic device by transmitting an electromagnetic wave of a large power. In Non-Patent Document 1 also illustrates an example of simultaneously transmitting the power communication with. Structure of the electromagnetic wave propagation sheet, as shown in FIG. 1, two layers lower layers 221 plane shape of the conductive layer, the upper layer 211 has a mesh shape. By applying an electromagnetic wave such as a microwave during the upper and lower conductive layers 221 and 211, to propagate the electric power to the electromagnetic wave propagation sheet. Dedicated coupler to the surface of the upper layer 211 of a mesh shape by placing a (like an antenna), it is possible to suck up the electromagnetic wave propagating in the electromagnetic wave propagating sheet.

JP 2009-189230 JP (page 38, FIG. 6) Pat. No. 4650906

Hiroyuki Shinoda et al, "Simultaneous transmission method of a signal and power using surface microwave (theory for ubiquitous sensor networks, and general)", Institute of Electronics, Information and Communication Engineers Technical Report Vol.107, No.53 (20,070,517 ) pp. 115-118

Electromagnetic wave propagating sheet (hereinafter sometimes referred to as "transmission sheet") in a wireless power transmission system using, that supplies power to even the power transmission (power receiving device in a state in which the power receiving device is not placed on the power transmission sheet main to continue with the aim power transmission) it can not be said with the system in consideration of the environment for which will be wasting power. Therefore, it is desirable that the power receiving device adds a transmission control function to the first time the power to recognize that it has been placed on the power transmission sheet is started.

However, the method disclosed in Patent Document 1 above, when considering the application of the wireless power transmission system using electromagnetic wave propagation sheet, a problem that is not easy to detect a reflected signal of the power receiving device with respect to temporary power transmission there is. The reason is that the ends of the transmission sheet is reflective end, because the standing wave is standing in the transmission sheet. Here, the reflection end, and the like state of the state where the conductors of the two-layer at the end of the transmission sheet is connected (short-circuited end) or disconnected (open end), electromagnetic waves sheet edge to propagate transmission sheet in standing wave to reflect stand. Unlike the reflection coefficient by the sheet size at the input of the power transmission sheet standing wave stands, it is not easy to detect the change of the reflection signal by the frequency of transmission.

In order to solve the above problems, a signal for detecting a power receiving device, rather than transmitting sheet, it is conceivable to radio transmission with a space. However, in this case, the radio signal is not only the power receiving device is placed the power transmitting device, because becomes possible received by the power transmission apparatus in the vicinity, the power transmitting device malfunction to transmitting the power receiving device is not placed there is a possibility to start.

The present invention aims to provide a technique for appropriately controlling the transmission operation of the power transmitting device.

It includes a power seat, a power transmitting unit that inputs electric power to the power transmitting sheet,
A power transmission control section that controls the power input process to the transmission sheet by the power transmission section,
A power transmission side communication unit which receives information transmitted from the power receiving device,
Have,
The power transmission control unit,
Wherein by controlling the power transmission unit, to enter the power of the first power value to the transmission sheet,
When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device inputs the received power value indicated by the power value information, the power of the first power value and the power transmitting sheet and a predetermined positional relationship that the power receiving device becomes compares the assumed received power value indicating a power value that is assumed to receive power and,
Wherein when the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, to input the power of the power transmission unit is controlled to the first larger power value than the power value in the power transmitting sheet transmission apparatus is provided.

Further, according to the present invention,
A power receiving unit that receives power via the power transmission sheet,
A power reception control section for detecting a power value the power receiving unit is receiving power,
A power receiving side communication unit which transmits the power value information indicating the power value to an external device,
Power receiving device with is provided.

Further, according to the present invention,
And the power transmission device,
Wireless power transmission system having a power-receiving device is provided.

Further, according to the present invention,
It includes a power seat, a power transmitting unit that inputs electric power to the power transmitting sheet,
A power transmission control section that controls the power input process to the transmission sheet by the power transmission section,
A power transmission side communication unit which receives information transmitted from the power receiving device via the transmission sheet,
Have,
The power transmission control unit,
Wherein by controlling the power transmission unit, to enter the power of the second power value to the transmission sheet,
When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device, the received power value indicated by the power value information, becomes the power transmitting sheet and a predetermined positional relationship the power receiving device compares the power receiving enabling power value indicating a power value that can power receiving you are,
When the received power value is determined to be the power receiving enabling power value or more, the power transmission device is provided for inputting power of the power transmission unit is controlled to the second larger power value than the power value in the power transmitting sheet .

Further, according to the present invention,
A power receiving unit that receives power via the power transmission sheet,
A power reception control section for detecting a power value the power receiving unit is receiving power,
The power value information indicating the power value, the power-receiving-side communication section that transmits to the power transmission device through the transmission sheet,
Power receiving device with is provided.

Further, according to the present invention,
And the power transmission device,
Wireless power transmission system having a power-receiving device is provided.

According to the present invention, a technique for appropriately controlling the transmission operation of the power transmission device can be realized.

Above objects, and other objects, features and advantages, preferred embodiments described below, and become more apparent from the following drawings associated therewith.

It is a diagram showing a reference technology. It is a diagram for explaining the first embodiment. It is a functional block diagram showing an example of a configuration of the first embodiment. It is a functional block diagram showing an example details of the configuration of the first embodiment. Is a flowchart showing an example of operation of the first embodiment. A temporary power transmission power profile of a specific example of the operation of the first embodiment. A temporary power transmission power profile of a specific example of the operation of the first embodiment. A power transmitting and receiving power database showing a specific example of the operation of the first embodiment. A temporary power transmission power profile of a specific example of the operation of the modification of the first embodiment. A temporary power transmission power profile of a specific example of the operation of the modification of the first embodiment. It is a functional block diagram showing an example of a configuration of the second embodiment. A transmission power database showing a specific example of an operation of the second embodiment. It is a diagram for explaining the third embodiment. It is a functional block diagram showing an example of a configuration of a third embodiment. Is a flow chart showing an example of the operation of the third embodiment. It is a functional block diagram showing an example of a configuration of a third embodiment. It is a functional block diagram showing an example of a configuration of a modification of this embodiment.

It will be described below with reference to the drawings, embodiments of the present invention. Note that the same components are denoted by the same reference numerals, and a description thereof is omitted.

Apparatus and system of the present embodiment, CPU (Central Processing Unit) of an arbitrary computer, memory, other programs that are stored from step in a memory of shipping program (pre-device loaded into memory, CD (Compact also includes program downloaded from a server such as a storage medium or on the Internet Disc), etc.), storage units such as a hard disk for storing the program, mainly an interface for network connection by any combination of hardware and software It is realized. Then, the implementation method, that there are various modifications in the device is about to those skilled in the art will appreciate.

The functional block diagram for use in explanation of the following embodiments is not a configuration of the hardware units, and a block of a functional unit. In these figures, each apparatus is described to be realized by a single device, the implementation means is not limited thereto. That is, even physically separate structure, but may be a configuration in which logically separate.

First Embodiment
[Description of Configuration]
Figure 2 is a diagram for explaining the first embodiment and shows a state in which power transmission using a sheet-like medium (transmission sheet). Figure 2, are two of the power transmission apparatus 1 and 1 'are close to each other are shown. Power transmitting device 1 and 1 'has a transmission terminal having an antenna 5 and 5', and a power transmission sheet 7 and 7' which led power terminal. On the transmission sheet 7 of the power transmitting device 1 includes the power receiving device 20 is located. When power is input to the power transmission sheet 7 from the transmission terminal with the antenna 5, the power receiving device 20 receives the electric power through the power transmission sheet 7. For the illustrated example, if it on the transmission sheet 7 'of the power transmission apparatus 1' is not placed power receiving device 20, the power receiving device 20 on the transmission sheet 7 'is placed, similarly, the power receiving device 20 can receive power via the power transmission sheet 7 '. Incidentally, by placing a plurality of power receiving apparatus 20 on the transmission sheet 7 and 7 ', it is also possible to transmit the power to a plurality of power receiving devices 20. Thus, the wireless power transmission system of this embodiment includes a plurality of power transmitting device 1, and at least one of the power receiving device 20.

Figure 3 shows an example of a functional block diagram of a wireless power transmission system of the first embodiment. As illustrated, the wireless power transmission system includes a power transmission device 1 receives becomes to the power transmitting device 1 and the predetermined positional relationship, and the power receiving device 20 that receives power from the power transmitting device 1, the power supply from the power receiving device 20 and an electronic device 30. In FIG. 3, it has been described separately receiving device 20 and the electronic device 30, the power receiving device 20 may be present as part of the electronic device 30.

First, the configuration of the power transmitting device 1. Power transmitting device 1, the power transmission unit 2, the power transmission control unit 3, the power transmission side communication unit 4, an antenna 5. The power transmission section 2 includes a high-frequency generating circuit 6 and the power transmitting sheet 7.

Although not shown, the high-frequency generating circuit 6, the power transmission control unit 3, power is supplied to the power transmission side communication unit 4. High-frequency generating circuit 6 generates a high-frequency power such as microwave, and inputs the transmission sheet 7. The power transmission control unit 3, the information such as the power transmission side communication unit 4 receives and controls the power (the transmitted power) outputted from the high frequency generating circuit 6 to the original, the start of transmission, stopping, changing the power value, the power and it controls the timing and the like to change the value. Power transmission side communication unit 4 performs communication with the power receiving communication unit 24 of the power receiving device 20 using the antenna 5, an individual identification number for authentication or the power receiving device 20 is a device suitable to the power transmitting device 1 and retrieve (ID), received power value information (power value the power receiving device 20 has received used to determine if placed on the power transmission sheet 7, the output power value of the high frequency rectifier specifically carry out the acquisition of showing information). Antenna 5 may be any arrangement according to the prior art. The power transmission section 2, except that is controlled by the power transmission control unit 3 may be any structure according to the prior art. That is, the configuration of the high-frequency generating circuit 6 and the transmission sheet 7 is not otherwise limited, may be any configuration according to the prior art. Configuration of the transmission sheet 7 may be a configuration shown in FIG. 1, for example.

Subsequently, the configuration of the power receiving device 20. The power receiving device 20 includes a power receiving section 21, the voltage control unit 22, an antenna 23, receiving-side communication unit 24, the power reception control unit 25. Power receiving unit 21 includes a power receiving coupler 27 and the high-frequency rectifier circuit 28. The power receiving control unit 25 includes a power detection unit 26.

Although not shown, the voltage control unit 22, the power receiving side communication unit 24, the power reception control unit 25, the output or DC power and voltage control of the high-frequency rectifier circuit 28 is supplied. By placing the power receiving coupler 27 constituting the power receiving apparatus 20 on the transmission sheet 7 constituting the power transmission device 1, power wirelessly is transmitted from the power transmitting device 1 to the power receiving device 20. High frequency power received by the power receiving coupler 27 is converted into direct current in a high frequency rectifier circuit 28 (including the smoothing circuit). Thereafter, the control of the appropriate voltage in the voltage control unit 22, DC power is supplied to the electronic device 30. Voltage control unit 22 and the antenna 23 can be any structure according to the prior art. Power receiving unit 21, except that is controlled by the power reception control unit 25 can be any structure according to the prior art.

Power reception control unit 25 includes a power detection unit 26 detects the output power value of the high frequency rectifier circuit 28, the power-transmitting-side power value information indicating the power value, at the antenna 23 via the power receiving side communication unit 24 to the communication unit 4. Power receiving communication unit 24 can perform an ID of the power receiving device 20, also transmits such charge information of the battery 32 to the power reception control unit 25 obtains from the charging control circuit 31 (remaining battery capacity). Communication means between the power transmission side communication unit 4 and the power receiving side communication unit 24 is not otherwise limited, it can employ any wireless communication means (for example, short-range wireless communication of the non-contact type). The charging control circuit 31 and the battery 32 can be any structure according to the prior art.

In FIG. 3, the electronic device 30 has a battery 32, but the power supplied from the voltage control unit 22 is charged into the battery 32 through the charging control circuit 31, the electronic device 30 does not have a battery 32 it is also possible to power the.

Here is a more detailed description of the power transmission device 1 of the present embodiment. Figure 4 shows an example of a functional block diagram of the power transmission device 1 of the present embodiment. In the figure, it shows a high-frequency generating circuit 6 and the power transmission control unit 3 detailed in Fig.

High-frequency generating circuit 6 includes a high-frequency oscillator 8, a variable gain amplifier 9 and an amplifier 10. High-frequency oscillator 8 can generate a sine wave of high-frequency wave such as a microwave. Then, the variable gain amplifier 9 amplifies the power at a specific gain. Then, the amplifier 10 amplifies the power to a predetermined transmission power value is input to the power transmission sheet 7.

The power transmission control unit 3 includes a storage unit 11, timing generator 12, a gain control unit 13 and the judging unit 14. Storage means 11 is such as memory components, temporary power transmission power profile (temporary power transmission when the transmission power value, such as information about the timing of switching the power value) and stores the power transmitting and receiving power database.

Incidentally, the power transmission from the power transmitting device 1 via the power transmission sheet 7 includes a "temporary power transmission" and "normal power transmission". Normal power transmission is a transmission with the primary purpose of conducting the power supply to the power transmission sheet 7 power receiving apparatus 20 placed on. Temporary power transmission is a transmission in which the main purpose to collect information for determining whether to perform the normal power transmission. In any temporary power transmission and normal power transmission, but power is supplied to the power transmission sheet 7, since the main purpose of the power transmission as described above is different, these transmission power profile (transmission power value) are different from each other. For example, towards the normal power transmission when the transmission power value is larger than the transmission power value at the time of temporary power transmission.

The transmitting and receiving power database, as shown in FIG. 8, the threshold value Pth0 of received power values, temporary power transmission when the transmission power value Pt1 to n (n is an integer of 2 or more), and power transmission in the transmission power value Pt1 to n transmitting sheet 7 received power value Pth1 through n power receiving device 20 is assumed to receive power that has been placed on, normal power value Ptnl like during transmission is described when.

Threshold Pth0 of received power values ​​can be used as one of the conditions for starting the normal power transmission. The power transmission sheet 7 as described above have generated a standing wave, power is hardly taken out in some places. Even if the power transmitting sheet 7 the power receiving device 20 on was located, if efficiently power receiving device 20 in a position that can not receive power is placed preferably it does not perform normal power transmission. Power transmission device 1 of this embodiment, the power-transmitting-side communication section 4 the power receiving device during temporary power transmission via the 20 acquires information indicating a power value receiving, and compares the power value and the threshold value Pth0. When the power value the power receiving device 20 is receiving is the threshold value Pth0 above, it can be configured to start the normal power transmission. As will be discussed below, the power transmission device 1 of the present embodiment may be configured such that instead of or in addition to this condition, and starts normal power transmission when the meet other conditions.

Received power value Pth1 through n during temporary power transmission shown in FIG. 8, assume that the power transmission device 1 is the transmission sheet 7 power receiving apparatus 20 placed on the receive if you enter a power value Pt1 to n to the power seat 7 shows the the power value (the output power value of the high frequency rectifier circuit 28). This can be used as one of the conditions for starting the normal power transmission. The details will be described below.

Power value Ptnl during normal power transmission shown in FIG. 8 shows the power values ​​at the time of normal power transmission. Power transmitting device 1 performs temporary power transmission, the power reception device 20 recognizes that it has been placed on the power transmission sheet 7 (usually determines that starts transmission), then starts normal power transmission in the power value.

Storage means 11, other stores a database ID of the own device (power transmitting device 1) the power receiving device 20 adapted to. The power receiving device 20 adapted to the own device (power transmitting device 1), a power receiving device 20 that the power supply is allowed.

Returning to FIG. 4, the timing generator 12, on the basis of the temporary power transmission power profile storage means 11, a signal for determining a timing for switching the transmission power value during temporary power transmission occurs, temporary power transmission power profile by gain control means 13 controlling the variable gain amplifier 9 so as to obtain as expected of the transmission power value (output power value of the amplifier 10). Power transmission device 1 of the present embodiment switches the transmission power value during temporary power transmission, detecting a change in the received power values ​​of the power reception device 20 associated therewith. Incidentally, a plurality of power transmitting device 1 are each, switching transmission power value, and, differently configured timing for switching the transmission power value to each other. That is, a plurality of power transmitting device 1, in a manner specific to the own device, switches the transmission power value. Therefore, aspects of change in the received power value of the power receiving device 20 that the power receiving temporary power transmission from the power transmitting device 1 is also different from each other, becomes to correspond to the aspect of switching between transmission power values ​​of the power transmitting device 1. Power transmission device 1 of the present embodiment utilizes the feature, the power transmitting-side communication section 4 powered device is transmitting and receiving information through the 20 is placed on the power transmission sheet 7 of its own device (power transmitting device) It determines whether or not there. The details will be described below.

Judging means 14, the ID of the power receiving device 20 to the power transmission side communication unit 4 acquires against the database of the storage unit 11 (not shown), the power receiving device 20 placed on the transmission sheet 7 adapted to the power transmitting device 1 the judgment is carried out whether those were. Furthermore, the determination means 14, the power transmission side received power values ​​of the power reception device 20 during temporary power transmission to the communication unit 4 acquires the threshold of the received power value of the transmitting and receiving power database (RF rectified output power value of the circuit 28) Pth0, Pth1 or it is compared with n, determines whether the power receiving device 20 is placed on the power transmission sheet 7. Obtained when the determining means 14 the power receiving device 20 is determined to have been placed on the power transmission sheet 7, the gain control means 13, typically a power value at the time of transmission described in the transmission power profile (output power value of the amplifier 10) controlling the variable gain amplifier 9 to be.

Storage means 11, it is possible to change the timing generator 12, a transmission power value during temporary power transmission by using the gain control means 13 at predetermined time intervals. Result, it is possible to vary the transmitted power value at different timing for each transmitting device 1. Further, the power transmission side communication unit 4 compares the power value of transmitting and receiving power database by judging unit 14 (output power value of the high frequency rectifier circuit 28 detected by the power detection unit 26) received power value of the acquired power receiving device 20 in, it can be the power receiving device 20 is reliably recognize that placed on the power transmission sheet 7. That is, although the power receiving device 20 is placed on the power seat 7 of the other of the power transmission apparatus 1, erroneously, it can reduce the inconvenience to determine that placed on the power transmission sheet 7 of self (power transmitting device 1) . In the following description of the operation will be described the reason why that can reduce the inconvenience.

[Description of Operation]
Next, the flowchart of FIG. 5, the overall view of FIG. 2, an example of overall operation of the present embodiment with reference to the functional block diagram of FIG. 3 and FIGS. 4 and 8, and the like will be described in detail.

As shown in FIG. 5, when the power of the power transmission apparatus 1 in the ON (S1), temporary power transmission of the transmission power value Pt0 is started (S2). Incidentally, the power transmission device 1 may start the temporary power transmission at another timing. For example, the power transmission device 1, after power is switched ON, the accepts an instruction input to start the temporary power transmission, it may start the temporary power transmission accordingly.

Power value Pt0 of temporary power transmission is stored in the storage unit 11 (see FIG. 4), the gain of the variable gain amplifier 9 is set by the timing generator 12 and the gain control means 13. Result, the power of Pto through the amplifier 10 is input to the power transmission sheet 7. Temporary power transmission may be carried out intermittently power be continuously power transmission. However, in situations where the power receiving device 20 is disconnected the battery 32 of the power supplying the electronic device 30 (i.e., even in a situation that is not powered from the battery 32 to the power receiving device 20), enough to perform the operation of the power receiving device 20 shown below it is desirable to power the power receiving device 20 to be able to powered. Here, it is assumed that both of the power transmission apparatus 1 and the power transmitting device 1 'shown in FIG. 2 starts temporary power transmission.

Power transmitting device 1 and the power transmitting device 1 'is the power receiving device 20 placed on the power seat 7 while performing the temporary power transmission, the power receiving temporary power transmission from the power transmitting device 1 via the power transmission sheet 7. Then, the power receiving device 20 is performed when detecting the power receiving of temporary power transmission based on the profile or the like of the power received via the power receiving unit 21, a process of transmitting the ID of the own device via the antenna 23 (power reception device 20) to. Then, the power transmission device 1 receives the ID transmitted from the antenna 23 via the antenna 5. The power transmission apparatus 1 determines upon receiving the ID, by matching the database of the storage unit 11, whether or not the power receiving device 20 of the received ID is adapted to the own device (power transmitting device 1). If the received ID power receiving device 20 is the one that conforms to its own device (power transmitting device 1), the power receiving device 20 of the received ID is authenticated as the one that conforms to its own device (power transmitting device 1) (S3) . Meanwhile, if the power receiving device 20 of the received ID is not the one that conforms to its own device (transmitting apparatus 1), the power transmitting device 1 does not authenticate the power receiving device 20, continued temporary power transmission of the transmission power value Pt0 back to S2 to. Here, the power transmitting device 1, the power receiving device 20 of the received ID is assumed that authenticated as those adapted to the own device (power transmitting device 1).

Incidentally, when the power receiving device 20 shown in FIG. 2 transmits the ID of the own device via the antenna 23 (power reception device 20), not only the power transmitting device 1, the power transmission device 1 'also this ID via the antenna 5' It may be obtained. The power transmission apparatus 1 'performs the authentication process. Here, the power transmission device 1 'also receives the ID of the power receiving device 20, the power receiving device 20 of the received ID is assumed that authenticated as those adapted to the own device (the power transmission apparatus 1').

The power receiving device 20, after transmitting the ID of its own device (the power receiving device 20), via the antenna 23, transmission power value information indicating the received power value Pr0 to the own device (the power receiving device 20) is powered during temporary power transmission I do. The power receiving device 20 can detect the output power value of the high frequency rectifier circuit 28 by the power detecting means 26 of the power reception control unit 25. Then, the power receiving device 20, the detected output power values ​​may be sent as a power value information.

Then, the power transmission device 1 receives the electric power value information transmitted from the antenna 23 via the antenna 5 (S4). Thereafter, the power transmitting device 1 performs a process of comparing the received power value Pr0 as shown by the power value information predetermined threshold Pth0 (see FIG. 8) (S5). If the received power value Pr0 is less than the threshold value Pth0, the power transmitting device 1 returns to step of S4, acquires the power value Pt0 again the power receiving device 20. On the other hand, if the received power value Pr0 is the threshold value Pth0 above, the power transmitting device 1 goes to step S6 and subsequent steps. During this time, the power transmitting device 1 continues the temporary power transmission of the transmission power value Pt0. If the received power value Pr0 is the threshold value Pth0 above, the power receiving device 20 can be considered to have been placed in a position which can be extracted to some extent or more power on the transmission sheet 7. Here, the power transmitting device 1 is assumed to received power value Pr0 is determined to be the threshold value Pth0 more. Power value Pth0 is stored in the storage unit 11.

On the other hand, it receives a power value information transmitted from the antenna 23 via the power transmission device 1 'also antenna 5'shown in FIG. Then, the carrying out the same processing as described above. Power transmitting device 1 as described above, if the received power value Pr0 is assumed it is determined that the threshold value Pth0 above, the power transmission device 1 'also, the received power value Pr0 is possible to determine that the threshold value Pth0 more. That is, the processing up to here, the power transmitting device 1 is transmitting an appropriate position on the sheet 7 was placed (position capable receiving enough power) power receiving device 20, and conforms to the own device (power transmitting device 1) Although it has the power receiving device 20 can identify, can not identify whether the power receiving device 20 is really placed on the power transmission sheet 7 of its own device (the power transmission apparatus 1). Therefore, the power transmitting device 1, S6 by the following power switching process, the power transmission side communication unit 4 powered device is transmitting and receiving information through the 20 is placed on the power transmission sheet 7 of its own device (power transmitting device 1) dolphins not identify either.

First, the first time (k = 1) of the power switching process (S6), the power transmitting device 1 changes the transmission power value in temporary power transmission from Pt0 the Ptm (S7). Ptm may be any of a transmission power value Pt1 through n of temporary power transmission indicated by the storage means 11 in the stored transmitting and receiving power database (see FIG. 8). Ptm may be stored in the storage unit 11 in advance as a temporary power transmission power profile.

Although the power transmitting device 1 'also becomes possible to perform the power switching process as well, Ptm' the Ptm the power transmission device 1' of the power transmission apparatus 1 is configured to be different values. For example, previously, the power transmitting device 1 and the power transmission device 1 ', respectively, Ptm and Ptm' different values ​​are registered as a temporary power transmission power profile. Or it may be realized by processing using a random number as described in the following embodiments.

After S7, the power transmitting device 1, via the power transmission side communication unit 4 receives the received power value Prk from the power receiving device 20, the received power value Prk received, the received power value Pthm corresponding to the transmission power value Ptm (Figure 8 reference) and determines if it matches (S9). Since the degree of error is expected, need not correspond precisely to, for example, it may be that it is sufficient fall within ± 10%. If different (No in S9), the power transmission side communication unit 4 is powered device to exchange information via the 20 may be regarded as not placed on the power seat 7 of the apparatus (power transmitting device 1) . In this case, the power transmitting device 1 returns to S2, starts temporary power transmission of the transmission power value Pt0. On the other hand, (Yes in S9) If they match, the process proceeds to S10.

Incidentally, as described above, Ptm of the power transmission apparatus 1 and since the power transmitting device Ptm' 1'are different values, and transmission power value Ptm and Ptm' received power value Pthm corresponding to each and Pthm' also different values Become. For Figure 2, the power transmitting device 1 and the power transmitting device 1 'obtains the same received power value Prk from the power receiving device 20, never both of the power transmission apparatus 1 and the power transmitting device 1' is Yes in the process of S9. That is, the self-device (power transmitting device 1) transmitting sheet 7 power transmitting device 1 the power receiving device 20 is placed on top is Yes in S9 in the power receiving device on the transmission sheet 7 'of its own device (the power transmission device 1') 20 power transmission device 1 'is not placed is expected to be no in S9.

In S10, the power transmission apparatus 1, predetermined number (n times) the power value switching process confirms whether conducted. If you have made n times, and the process proceeds to S17. If you have not done, the value of k is increased 1 (S11), the process proceeds to the next power value switching process. Incidentally, when it becomes Yes in S9, the process proceeds to later S17, may start normal power transmission. However, by incorporating the process of S10 to S16, it can be a robust system error hardly occurs.

In S12, the power transmission device 1 is switched to Pt0 the transmission power value in temporary power transmission from the Ptm. Thereafter, the power transmitting device 1, via the power transmission side communication unit 4 receives the received power value Prk + 1 from the power receiving device 20, the received power value Prk + 1 received, the transmission power value received power value corresponding to Pt0 Pthm + 1 and matches the decision process is carried out or (S14). Pthm + 1 is the transmission power value is received power value of the power receiving device 20 which is assumed at the time of Pt0, for example, a value obtained by adding the difference of the transmission power value Ptm and Pt0 to Pr0. Since the degree of error is expected, need not correspond precisely to, for example, it may be that it is sufficient fall within ± 10%. If different (No in S14), the power transmitting device 1 returns to S2, starts temporary power transmission of the transmission power value Pt0. On the other hand, (Yes in S14) If they match, the process proceeds to S15.

In S15, the power transmission apparatus 1, predetermined number (n times) the power value switching process confirms whether conducted. If you have made n times, and the process proceeds to S17. If you have not done, the value of k is increased 1 (S16), it returns to S7. And later to repeat the same process.

In S17, the power transmitting device 1 recognizes that the own device (power transmitting device 1) transmitting sheet 7 the power receiving device 20 on the is placed, starts normal power transmission of the transmission power value Ptnl (S18). Setting of the transmission power value Ptnl the number of times of switching the total transmission power value and the time of normal power transmission is stored in the storage unit 11.

Here, FIG. 6 shows the evolution of the transmission power value of the power transmission apparatus 1 in the power value switching process. Power transmitting device 1 is initially starts temporary power transmission in the transmission power value Pt0. Thereafter, the power transmitting device 1, the first power value switching process at time t, switching the transmission power value Ptm (S7). Then, the power transmission device 1, the second power value switching process at time t + [Delta] T, switches the transmission power value Pt0 (S12). Thereafter, the power transmitting device 1, a predetermined number of times the switching process (n times) after, starts normal power transmission of the transmission power value Ptnl (S18).

Next, FIG. 7 shows the evolution of the transmission power value in the power transmission device 1 '. Here, it indicates a transition of the transmitted power value when the power transmitting device transmitting sheet 7 'the power receiving device on 20 1'is placed. Similarly the power transmission device 1 'first starts transmitting the (temporary power transmission) in transmission power value Pt0. Then, the power transmission device 1 ', the first power value switching process at time t, switching the transmission power value Ptm' (S7). Is a value different from the Ptm' of Ptm and 7 of Figure 6. Then, the power transmission device 1 ', the second power value switching process at time t + [Delta] T, switches the transmission power value Pt0 (S12). Then, the power transmission device 1 ', a predetermined number of times (n times) the switching process after, and starts normal power transmission of the transmission power value Ptnl (S18).

Thus, different from the transition of temporary power transmission when the power value of the power transmission apparatus 1, and changes of the temporary power transmission when the power value of the power transmitting device 1 '. Therefore, the transition of the received power values ​​of the power reception device 20 to the power transmission device 1 is expected (transition of the received power value transmitting device 1 of the transmission sheet 7 power receiving apparatus 20 placed on is powered), the power transmission device 1 'is different from the transition of the received power value of the power receiving device 20 that expected (transition of the received power value transmitting device power receiving device 20 placed on the transmission sheet 7 '1' is powered). In the present embodiment, determines such by utilizing the difference, a power seat 7 and the power receiving device 20 on the 7 'of its own device incorrectly power transmitting device 1 and 1' (the power transmitting device 1 and 1 ') is placed It is to reduce the disadvantages.

The value of n in S10 and S15 in FIG. 5 may be one. In other words, performed by the power value switching processing once (Pt0 → Ptm), may not be performed in the processing from S11 to S15. Even in this case, to some extent alleviate the above disadvantages. However, the n is 2 or more, better performing the process from S11 to S15, can be a robust system error hardly occurs.

As a modification of this embodiment, in the power value switching processing is switched to alternating Ptm and Pt0, instead of changing the Ptm in Pt0, stored transmitting and receiving power database in the storage unit 11 (FIG. 8 it may be the other one in the transmission power value Pt1 through n of temporary power transmission indicated by reference). The transition of the transmission power value by the power transmitting device 1 in such a case shown in FIG. 10. Even in this case, it can be different the transition of transmitted power value for each power transmission device 1.

Another variation of this embodiment, the determination unit 14, by adding the function of monitoring the switching timing of the transmitting and receiving power value during temporary power transmission, conceivable embodiment to have a specific resistance to a plurality of power transmitting device 1 . In the above in order to have a specific resistance in the power transmission apparatus 1, with different transmission power value Ptm plurality of power transmitting device 1 respectively. In addition to or instead of this, the timing for switching the transmission power value Pt0 and Ptm (Pt0 → Ptm and Ptm → Pt0) may be allowed different for each transmitting device 1. Thus, the received power value Prk and Prk + 1 is switched timing of the power receiving device 20 to the power transmission apparatus 1, each expected (time interval etc.) differ. In the present embodiment, such by utilizing a difference, the power receiving device 20 on the transmission sheet 7 of the device itself the power transmitting device 1 is incorrect (power transmitting device 1) may reduce the inconvenience of determining the placed. In such a case, for example, transition of the first transmission power value of the power transmission apparatus 1 is as shown in FIG. 6 or FIG. 7, transition of the second transmission power value of the power transmission apparatus 1, as shown in FIG. 9 Become. Even in this case, it can be different the transition of transmitted power value for each power transmission device 1.

[Description of Effect]
Description will now be given of an advantage of the present embodiment. In this embodiment, the power transmitting device 1 before performing the normal power transmission, and performs temporary power transmission. The power transmission apparatus 1 obtains information from the power receiving device 20 during temporary power transmission (ID, received power value, etc.).

The power transmission apparatus 1 can judge whether or not the utilizing the information obtained from the power receiving device 20, the information transmission source of the power receiving device 20 is adapted to the own device (power transmitting device 1). This is achieved by S3 in FIG. Result, the power transmission apparatus 1 can avoid a disadvantage that transmits power toward the power receiving device 20 that do not conform to its own device (the power transmission apparatus 1).

Further, the power transmission device 1 by using the information acquired from the power receiving device 20, an appropriate position on the power receiving device 20 is transmitting sheet 7, that is, to determine whether or not in a position that can adequately receive power. This is achieved by S5 in Fig. Result, the power transmitting device 1 can be improper position on the transmission sheet 7, i.e. towards the power receiving device 20 in a position that can not be adequately receiving power to avoid a disadvantage that transmits power.

It power transmitting device 1 which utilizes the information obtained from the power receiving device 20, the information transmission source of the power receiving device 20 determines whether or not placed on the power transmission sheet 7 of its own device (power transmitting device 1) can. This, S6 through S16 in FIG. 5, or may be realized by modifications described above. Result, the power transmission apparatus 1 can avoid a disadvantage that transmits power (normal power transmission) to the own device (power transmitting device 1) transmitting sheet 7 the power receiving device 20 on the is not placed.

Second Embodiment
[Description of Configuration]
An example of a functional block diagram of a wireless power transmission system of this embodiment, as in the first embodiment, shown in Figure 3. Details of a functional block diagram of the power transmission device 1 of this embodiment can be replaced with a structure shown in FIG. 11 the power transmission control unit 3 in FIG. Hereinafter, description will be made on differences from the first embodiment.

Comparing the power transmission control unit 3 of FIG. 11 and FIG. 4, the power transmission control unit 3 of this embodiment is seen that differ from the power transmission control unit 3 of FIG. 4 in that it further comprises a random number generation unit 15. The storage unit 11 can be imparted by adding the transmission power database to be described later. Based on the random number and transmission power database which is generated by the random number generating unit 15, the timing of the transmission power value and the power switch of the temporary power transmission power profile is determined.

[Description of Operation]
Figure 12 is a transmission power database showing a specific example of an operation of the second embodiment. This database is stored in the storage means 11 in FIG. 11, the timing for switching the transmission power value (time to continue transmission at each transmission power value), and, the transmitted power value Ptm is shown. ΔT and Ptm shown in FIG. 11 corresponds to ΔT and Ptm shown in FIG.

For example, a random number is generated by random number generation means 15 at any time after the power is ON (S1) in the flowchart of FIG. The power transmission apparatus 1 refers to the transmission power database the random number as a key (FIG. 12), determines a ΔT and Ptm of temporary power transmission. For example, if the random number is 1, Figure 12 the transmission power database based on ΔT is ○ seconds combination number 1 of, Ptm is determined in ● W. The power transmission device 1, the transmission power switching processing of S6 to S15 in FIG. 5, using the ΔT and Ptm determined here, performs transition of the transmission power value as shown in FIG. Other steps are the same as in the first embodiment.

Here, an example has been described of determining both ΔT and Ptm in the random number may be configured to determine only one of a random number.

[Description of Effect]
Add a random number generating unit 15 in the power transmission control unit 3, the transmission power of the storage means by 11 by giving an additional transmission power database, different temporary power transmission power profile for each transmitting device 1 to a random number based on (temporary power transmission when so that the switching timing) values ​​and power values ​​are applied.

Third Embodiment
[Description of Configuration]
Figure 13 is a diagram for explaining the third embodiment and shows a state of the power transmission with the sheet-like medium (transmission sheet). On transmission sheet 7 of the power transmission apparatus 101 is the power receiving device 120 is located. 13, FIG. 2 differs for explaining the first embodiment is that there is no antenna to the power transmitting device 101 and 101 'and the power receiving device 120. Communication between the power transmitting apparatus 101 and the power receiving device 120 is performed via the power transmission sheet 7.

Figure 14 shows an example of a functional block diagram of a wireless power transmission system of the present embodiment. Comparing the wireless power transmission system of this embodiment and the wireless power transmission system shown in FIGS. 3 and 4, the power transmission device 101 of this embodiment, that there is no antenna 5 and the timing generating unit 12, duplexer 16 some point between the high-frequency generating circuit 6 and the power transmitting sheet 7, the power transmission side communication unit 4 differs in that it is connected to a duplexer 16, rather than an antenna. Further, the power receiving device 120 of this embodiment, that no antenna 23, that the duplexer 29 is between the high-frequency rectifier circuit 28 and the power receiving coupler 27, the power receiving side communication unit 24 connected to the duplexer 29 rather than the antenna different in that it is.

When performing temporary power transmission and normal power transmission, high-frequency generating circuit 6 of the power transmission device 101 generates a high-frequency power such as microwave, to enter the high-frequency power to the power transmission sheet 7 through the duplexer 16. The power transmission control unit 103, information or the like power transmission side communication unit 4 has acquired by controlling the power output from the high frequency generating circuit 6 to the original, performs the start of the transmission, suspension, power value changes, and the like. Power transmission side communication unit 4 communicates with the power receiving communication unit 24 of the power receiving device 20 via the duplexer 16 and the power transmitting sheet 7, the authentication or the power receiving device 20 is a device suitable to the power transmitting device 101 and retrieve individual identification number (ID) for performing the acquisition of the transmission received power value used in determining whether the placed on the sheet 7 (the power value received by the power receiving device 20) information carried.

Power wirelessly to the power receiving apparatus 120 from the power transmitting apparatus 101 by placing the power receiving coupler 27 constituting the power receiving apparatus 120 on the transmission sheet 7 constituting the power transmission apparatus 101 is transmitted. High frequency power received by the power receiving coupler 27, the direct current through the duplexer 29 is converted into direct current in a high frequency rectifier circuit 28 (including the smoothing circuit) is controlled to an appropriate voltage in the voltage control unit 22 to the electronic device 30 It supplies power. Power reception control unit 25 includes a power detection unit 26 detects the output power value of the high frequency rectifier circuit 28, the power value information, the duplexer 29 using power receiving side communication unit 24 and the power receiving coupler 27 shared through the vessel 16 and transmits to the transmission side communication unit 4. Power receiving communication unit 24 performs an ID of the power receiving device 120, also transmits such charge information of the battery 32 to the power reception control unit 25 obtains from the charging control circuit 31 (remaining battery capacity).

As a variation of this embodiment, as shown in FIG. 16, without using the duplexer 16 in the power transmitting device 301, it is conceivable to connect the power transmission side communication unit 4 to the power transmission sheet 7. Also, without using the duplexer 29 in the power receiving apparatus 320, it is conceivable to perform communication with the power transmission device 301 connects the power receiving side communication unit 24 to the communication coupler 33.

As another variation, as shown in FIG. 17, without using the duplexer 16 in the power transmitting device 401, it is conceivable to connect the communication coupler 402 to the power transmission side communication unit 4. Power transmission side communication unit 4 via the power transmission sheet 7 using the communication coupler 402, can communicate with the power receiving device 320.

[Description of Operation]
Figure 15 is a flow chart showing an example of the processing flow of the power transmission device 101 of this embodiment. Processing S101 to S105 shown in FIG. 15 is the same as the processing of S1 to S5 shown in FIG. However, the power transmission device 101 and the power receiving device information (ID of the power receiving device 120, power value charged in the power receiving device 120) of between 120 means transmitting and receiving are different as described above.

Then, (No of S105) when it is fully free to S105 condition of Figure 15, the power transmitting device 101 returns to S104 process, acquires the power value Pr0 of the power receiving apparatus 120 again. During this time, the power transmitting device 1 continues the temporary power transmission of the transmission power value Pt0.

On the other hand, satisfy the case (S105 of Yes), the power transmitting device 1 of the S105, the process proceeds to S117. Processing of S117 and S118 is the same as the processing in S17 and S18 shown in FIG.

[Description of Effect]
In this embodiment, the power transmission side communication unit 4 connected to the duplexer 16, instead of the antenna 5, to communicate with the power receiving apparatus 120 via the power transmission sheet 7. Further, the power receiving side communication unit 24 connected to the duplexer 29, instead of the antenna 23 to communicate with the power transmission apparatus 101 via the power receiving coupler 27. The communication between the power transmitting apparatus 101 and the power receiving device 120, by performing with the power transmission sheet 7 and the power receiving coupler 27, the electromagnetic waves used for communication is in addition to the vicinity of the surface of the transmission sheet 7 (especially of the transmission sheet of FIG. 1 because at the end if the conductor two layers is in the connected short) does not leak, the other power transmission device placed in the vicinity of the received power value information of the power receiving device 120 (e.g. power transmitting device 101 'of FIG. 13) There is little possibility of causing the malfunction, such as to start receiving and transmitting. Therefore, it is unnecessary or switch the power value at the time of temporary power transmission as in the first embodiment without providing wireless power transmission system using electromagnetic wave propagating sheet no malfunction with a simple transmission control .

As described in the first to third embodiments, the power transmission control unit 3 of this embodiment controls the power input process to power the seat 7 by the power transmission section 2. For example, as shown in FIG. 5, the power transmission control unit 3 controls the power transmission unit 2, and inputs the first power value of power (Ptm) to the power transmitting sheet 7 (S7). The power transmission control unit 3, when the power value information indicating a power value the power receiving device 20 has receiving the (Prk) power transmission side communication unit 4 receives from the power receiving device 20 (S8), received power indicated by the power value information value and (Prk), the first power value (Ptm) assuming received power value indicating a power value becomes to have power seat 7 with a predetermined positional relationship input and the power receiving device 20 has a power is supposed to receiving the (Pthm) and comparing (S9). The power transmission control unit 3, (Yes in S9) when the difference between the received power value (Prk) and assuming received power value (Pthm) is determined to be smaller than the predetermined level, the first power by controlling the power transmission unit 2 inputting large power value than the value (Ptm) power (Ptnl) to the power transmitting sheet 7 (S18). Note that the first power transmitting device 1 and the second power transmitting device 1 of the plurality of power transmitting device 1, the first power value (Ptm) are different from each other.

Further, the power transmission control unit 3 may be configured as follows. For example, as shown in FIG. 5, the power transmission control unit 3 controls the power transmission unit 2, the power value of the first through x (x is an integer of 2 or more) (Ptm, Pt0, is described in transmitting and receiving power database and that the power of the temporary power transmission of the power transmission power Pt1 to n, etc.) is input to the power transmission sheet 7 by switching a predetermined number of times at a predetermined timing (S7, see FIGS. 6, 7, 9 and 10). The power transmission control unit 3, when to switch the power value, and each time, then the transmission side communication unit 4 is received (S8, S13) the received power value indicated by the power value information (Prk, Prk + 1, etc.), showing a first power value of y (y is an integer of 1 or more x) power values ​​become power seat 7 with a predetermined positional relationship that the input and the power receiving device 20 has a power is assumed that receiving power of the switched assuming the received power value (Pthm, Pthm + 1, etc.) and comparing (S9, S14). The power transmission device 1, even after any switching of a predetermined number of times, the received power value (Prk, Prk + 1, etc.) and the assumed received power value (Pthm, Pthm + 1, etc.) when the difference between is determined to be smaller than the predetermined level (S9 and Yes of S14), first, the power value of the x and controls the power transmission unit 2 (Ptm, Pt0, larger power value than the temporary power transmission in the transmission power Pt1 to n, etc.) described in transmitting and receiving power database ( to input the power of Ptnl) to the power transmission sheet 7 (S18). Note that the first power transmitting device 1 and the second power transmitting device 1 of the plurality of power transmitting device 1, the timing of switching the power value, the power value of the first to x, and the power of the first through x at least one of the order of switching the value differs from each other.

Further, the power transmission control unit 3 uses the random number, the power value of the first to x, and can determine the timing for switching the power value (second embodiment).

Further, the power transmission control unit 3 may be configured as follows. For example, as shown in FIG. 15, the power transmission control unit 3 controls the power transmission unit 2, and inputs the second power value of power (Pt0) in the transmission sheet 7 (S102). The power transmission control unit 3, the power receiving device when 120 receives the transmission-side communication unit 4 electric power value information indicating the power value (Pr0) receiving (S104), receiving electric power value shown in the power value information (Pr0) When, power seat 7 with a predetermined positional relationship with going on the power receiving apparatus 120 compares the power receiving enabling power value indicating a power value that can be powered (Pth0) (S105). The power transmission control unit 3, the received power value (Pr0) is determined to be power receiving enabling power value (Pth0) above (Yes in S105), the second power value and controls the power transmission unit 102 from (Pt0) to input the power of even greater power value (Ptnl) in the transmission sheet 7.

It will be indicated hereinafter an example of a reference embodiment.
1. It includes a power seat, a power transmitting unit that inputs electric power to the power transmitting sheet,
A power transmission control section that controls the power input process to the transmission sheet by the power transmission section,
A power transmission side communication unit which receives information transmitted from the power receiving device,
Have,
The power transmission control unit,
Wherein by controlling the power transmission unit, to enter the power of the first power value to the transmission sheet,
When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device inputs the received power value indicated by the power value information, the power of the first power value and the power transmitting sheet and a predetermined positional relationship that the power receiving device becomes compares the assumed received power value indicating a power value that is assumed to receive power and,
Wherein when the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, to input the power of the power transmission unit is controlled to the first larger power value than the power value in the power transmitting sheet transmission apparatus.
2. In the power transmission device according to 1,
The power transmission control unit,
The power transmission unit by controlling the power value of the first through x (x is an integer of 2 or more) is input power to the power transmission sheet while switching a predetermined number of times at a predetermined timing,
When to switch the power value, each time, then said reception power value the power transmission side communication unit is indicated by the power value information received and the power value of the y after the switching (y the following 1 or more x comparing the assumed received power value indicating a power value the power receiving device that is the transmission seat and a predetermined positional relationship that the input power of an integer) is assumed to receive power,
Even after any switching of the predetermined number of times, said the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, than the power value of controlling the power transmission unit to the first to x the power transmission device to input power of a large power value to the transmission sheet.
3. In the power transmission device according to 2,
The power transmission control unit uses the random number, the power value of the first to x, and, the power transmission apparatus for determining a timing for switching the power value.
1-1. Computer,
A transmission step of inputting power to the power transmission sheet,
A transmission control step of controlling the power input process to the transmission sheet by the transmission step,
A transmission side communication process of receiving the information transmitted from the power receiving device,
The execution,
In the power transmission control step,
The power of the first power value is input to the power transmitting sheet,
When the power receiving device is received from the power receiving device power value information indicating a power value received at the power transmission side communication process, enter the received power value indicated by the power value information, the power of the first power value and the power transmitting sheet and a predetermined positional relationship that the power receiving device becomes compares the assumed received power value indicating a power value that is assumed to receive power and,
Wherein when the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, the operation method of the power transmitting device to input power of the large power value than the first power value to the transmission sheet.
1-2. In a method of operating a power transmission device according to 1-1,
In the power transmission control step,
First through power value of the x (x is an integer of 2 or more) is input to the power transmitting sheet while switching a predetermined number of times at a predetermined timing of power,
When to switch the power value in each case, followed by the said received power value indicated by the power value information received by the transmission side communication process, the power value of the y after the switching (y the following 1 or more x comparing the assumed received power value indicating a power value the power receiving device that is the transmission seat and a predetermined positional relationship that the input power of an integer) is assumed to receive power,
Wherein the predetermined number of times after switching of one of the the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, the power of the first to larger power value than the power value of the x method of operating a power transmitting device for inputting a power seat.
1-3. In a method of operating a power transmission device according to 1-2,
Wherein in the transmission control step, by using a random number, power value of the first to x, and method of operating a power transmission apparatus for determining a timing for switching the power value.
2-1. The computer,
Transmission means for inputting a power to the power transmission sheet,
Transmission control means for controlling the power input process to the transmission sheet by the transmission means,
Transmitting-side communication means for receiving information transmitted from the power receiving device,
To function as,
The power transmission control means,
Wherein by controlling a power transmission means, to enter the power of the first power value to the transmission sheet,
When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device inputs the received power value indicated by the power value information, the power of the first power value and the power transmitting sheet and a predetermined positional relationship that the power receiving device becomes the by comparing the assumed received power value indicating a power value that is assumed to receive power and,
Wherein when the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, a program for inputting the power of the large power value transmission means controlled by a than the first power value to the transmission sheet .
2-2. The program according to 2-1,
The power transmission control means,
The power transmission means controlling the power value of the first through x (x is an integer of 2 or more) is input power to the power transmission sheet while switching a predetermined number of times at a predetermined timing,
When to switch the power value, each time, then the transmission side communication means and the received power value indicated by the power value information received, the power value of the y after the switching (y the following 1 or more x is compared with the assumed received power value indicating a power value becomes the power seat and a predetermined positional relationship that the input and the power receiving apparatus power is assumed that the power receiving an integer),
Even after any switching of the predetermined number of times, said the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, the power transmission means is controlled to a than the power value of the first through x program for inputting the power of high power value to the transmission sheet.
2-3. The program according to 2-2,
Wherein the power transmission control means uses a random number, power value of the first to x, and a program for determining a timing for switching the power value.
4. A power receiving unit that receives power via the power transmission sheet,
A power reception control section for detecting a power value the power receiving unit is receiving power,
A power receiving side communication unit which transmits the power value information indicating the power value to an external device,
Powered device with.
4-1. Computer,
A power receiving step of receiving power via a power transmission sheet,
A power reception control step of detecting a power value received at the power receiving step,
A power receiving side communication process transmits the power value information indicating the power value to an external device,
Method of operating a power receiving apparatus for performing.
4-2. The computer,
Receiving means for receiving power via the power transmission sheet,
The power reception control means for detecting a power value which the receiving means is receiving power,
Receiving-side communication means transmits the power value information indicating the power value to an external device,
Program to function as.
5. A power transmission device according to any one of 1 to 3,
Wireless power transmission system having a power receiving device according to 4.
6. In wireless power transmission system according to 5,
A plurality of the power transmission device, first the power transmitting device and the second of the power transmission device, a wireless power transmission system different from the first power value to each other among the plurality of the power transmitting device.
7. In wireless power transmission system according to 5 or 6,
A plurality of power transmission device according to 2 or 3,
The plurality of the power transmitting device first of the power transmitting device and a second of said power transmitting device in a timing of switching the power value, the first through power value of the x, and, of the first through x at least one of different wireless power transmission system in order to switch the power value.
8. It includes a power seat, a power transmitting unit that inputs electric power to the power transmitting sheet,
A power transmission control section that controls the power input process to the transmission sheet by the power transmission section,
A power transmission side communication unit which receives information transmitted from the power receiving device via the transmission sheet,
Have,
The power transmission control unit,
Wherein by controlling the power transmission unit, to enter the power of the second power value to the transmission sheet,
When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device, the received power value indicated by the power value information, becomes the power transmitting sheet and a predetermined positional relationship the power receiving device compares the power receiving enabling power value indicating a power value that can power receiving you are,
Wherein the received power value is determined to be the power receiving enabling power value or more, the power transmission device to input power of the power transmission unit is controlled to the second larger power value than the power value to the transmission sheet.
8-1. Computer,
A transmission step of inputting power to the power transmission sheet,
A transmission control step of controlling the power input process to the transmission sheet by the transmission step,
A transmission side communication process of receiving the information transmitted from the power receiving device via the transmission sheet,
The execution,
In the power transmission control step,
The power of the second power value is input to the power transmitting sheet,
When the power receiving device is received from the power receiving device power value information indicating a power value received at the power transmission side communication process, the received power value indicated by the power value information, becomes the power transmitting sheet and a predetermined positional relationship the power receiving device compares the power receiving enabling power value indicating a power value that can power receiving you are,
Wherein the received power value is determined to be the power receiving enabling power value or more, a method of operating a power transmission apparatus for inputting power of the large power value than the second power value to the transmission sheet.
8-2. The computer,
Transmission means for inputting a power to the power transmission sheet,
Transmission control means for controlling the power input process to the transmission sheet by the transmission means,
Transmitting-side communication means for receiving information transmitted from the power receiving device via the transmission sheet,
To function as,
The power transmission control means,
Wherein by controlling a power transmission means, to enter the power of the second power value to the transmission sheet,
When the power value information indicating a power value the power receiving device is receiving said power transmission side communication means for receiving from the power receiving device, the received power value indicated by the power value information, becomes the power transmitting sheet and a predetermined positional relationship the power receiving device is compared with the power receiving enabling power value indicating a power value that can power receiving you are,
Wherein the received power value is determined to be the power receiving enabling power value or more, the program for inputting the power of larger power value than the second power value by controlling the power transmitting means to the power transmission sheet.
9. A power receiving unit that receives power via the power transmission sheet,
A power reception control section for detecting a power value the power receiving unit is receiving power,
The power value information indicating the power value, the power-receiving-side communication section that transmits to the power transmission device through the transmission sheet,
Powered device with.
9-1. Computer,
A power receiving step of receiving power via a power transmission sheet,
A power reception control step of detecting a power value received at the power receiving step,
The power value information indicating the power value, the power receiving communication step of transmitting to the power transmission device through the transmission sheet,
Method of operating a power receiving apparatus for performing.
9-2. The computer,
Receiving means for receiving power via the power transmission sheet,
The power reception control means for detecting a power value which the receiving means is receiving power,
Receiving-side communication means for transmitting power value information indicating the power value, the power transmission device through the transmission sheet,
Program to function as.
10. And a power transmission device according to 8,
Wireless power transmission system having a power receiving device according to 9.

This application claims priority based on Japanese Patent Application No. 2013-225010, filed on October 30, 2013, the entire disclosure of which is incorporated herein.

Claims (10)

  1. It includes a power seat, a power transmitting unit that inputs electric power to the power transmitting sheet,
    A power transmission control section that controls the power input process to the transmission sheet by the power transmission section,
    A power transmission side communication unit which receives information transmitted from the power receiving device,
    Have,
    The power transmission control unit,
    Wherein by controlling the power transmission unit, to enter the power of the first power value to the transmission sheet,
    When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device inputs the received power value indicated by the power value information, the power of the first power value and the power transmitting sheet and a predetermined positional relationship that the power receiving device becomes compares the assumed received power value indicating a power value that is assumed to receive power and,
    Wherein when the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, to input the power of the power transmission unit is controlled to the first larger power value than the power value in the power transmitting sheet transmission apparatus.
  2. In the power transmission device according to claim 1,
    The power transmission control unit,
    The power transmission unit by controlling the power value of the first through x (x is an integer of 2 or more) is input power to the power transmission sheet while switching a predetermined number of times at a predetermined timing,
    When to switch the power value, each time, then said reception power value the power transmission side communication unit is indicated by the power value information received and the power value of the y after the switching (y the following 1 or more x comparing the assumed received power value indicating a power value the power receiving device that is the transmission seat and a predetermined positional relationship that the input power of an integer) is assumed to receive power,
    Even after any switching of the predetermined number of times, said the difference between the received power value and the assumed received power value is determined to be smaller than the predetermined level, than the power value of controlling the power transmission unit to the first to x the power transmission device to input power of a large power value to the transmission sheet.
  3. In the power transmission device according to claim 2,
    The power transmission control unit uses the random number, the power value of the first to x, and, the power transmission apparatus for determining a timing for switching the power value.
  4. A power receiving unit that receives power via the power transmission sheet,
    A power reception control section for detecting a power value the power receiving unit is receiving power,
    A power receiving side communication unit which transmits the power value information indicating the power value to an external device,
    Powered device with.
  5. A power transmission device according to any one of claims 1 to 3,
    Wireless power transmission system having a power receiving device according to claim 4.
  6. In wireless power transmission system according to claim 5,
    A plurality of the power transmission device, first the power transmitting device and the second of the power transmission device, a wireless power transmission system different from the first power value to each other among the plurality of the power transmitting device.
  7. In wireless power transmission system according to claim 5 or 6,
    A plurality of power transmitting device according to claim 2 or 3,
    The plurality of the power transmitting device first of the power transmitting device and a second of said power transmitting device in a timing of switching the power value, the first through power value of the x, and, of the first through x at least one of different wireless power transmission system in order to switch the power value.
  8. It includes a power seat, a power transmitting unit that inputs electric power to the power transmitting sheet,
    A power transmission control section that controls the power input process to the transmission sheet by the power transmission section,
    A power transmission side communication unit which receives information transmitted from the power receiving device via the transmission sheet,
    Have,
    The power transmission control unit,
    Wherein by controlling the power transmission unit, to enter the power of the second power value to the transmission sheet,
    When the power value information indicating a power value the power receiving device is receiving said power transmission side communication unit receives from the power receiving device, the received power value indicated by the power value information, becomes the power transmitting sheet and a predetermined positional relationship the power receiving device compares the power receiving enabling power value indicating a power value that can power receiving you are,
    Wherein the received power value is determined to be the power receiving enabling power value or more, the power transmission device to input power of the power transmission unit is controlled to the second larger power value than the power value to the transmission sheet.
  9. A power receiving unit that receives power via the power transmission sheet,
    A power reception control section for detecting a power value the power receiving unit is receiving power,
    The power value information indicating the power value, the power-receiving-side communication section that transmits to the power transmission device through the transmission sheet,
    Powered device with.
  10. A power transmission device according to claim 8,
    Wireless power transmission system having a power receiving device according to claim 9.
PCT/JP2014/063098 2013-10-30 2014-05-16 Power transmitting device, power receiving device, and wireless power transmission system WO2015064132A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2013225010 2013-10-30
JP2013-225010 2013-10-30

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JP2015544825A JP6489020B2 (en) 2013-10-30 2014-05-16 Power transmission apparatus and the wireless power transmission system

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Citations (4)

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JP2005110399A (en) * 2003-09-30 2005-04-21 Sharp Corp A contactless power supply system
JP2010527226A (en) * 2007-05-08 2010-08-05 モジョ モビリティー インコーポレイテッド Inductive charging system and method of the portable device
JP2010183705A (en) * 2009-02-04 2010-08-19 Seiko Epson Corp Method of testing power transmission apparatus or power receiving apparatus, power transmission apparatus, power receiving apparatus and non-contact power transmission system
JP4650906B2 (en) * 2005-09-12 2011-03-16 国立大学法人 東京大学 Signal transmission device, the interface device, and a communication system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5434297B2 (en) * 2009-06-23 2014-03-05 セイコーエプソン株式会社 Power transmission control device, the power transmission device, non-contact power transmission system and an electronic device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005110399A (en) * 2003-09-30 2005-04-21 Sharp Corp A contactless power supply system
JP4650906B2 (en) * 2005-09-12 2011-03-16 国立大学法人 東京大学 Signal transmission device, the interface device, and a communication system
JP2010527226A (en) * 2007-05-08 2010-08-05 モジョ モビリティー インコーポレイテッド Inductive charging system and method of the portable device
JP2010183705A (en) * 2009-02-04 2010-08-19 Seiko Epson Corp Method of testing power transmission apparatus or power receiving apparatus, power transmission apparatus, power receiving apparatus and non-contact power transmission system

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