KR20170018678A - Appratus of controlling wireless power transmitter and method of controlling wireless power transmitter - Google Patents

Abstract

A wireless power transmission control apparatus is disclosed. One embodiment includes a memory storing software operating to power a target device in a plurality of wireless power transmission schemes; And a controller for accessing the memory, wherein the software is further configured to, when the target device is sensed, to determine whether the target device is capable of responding to any one of the plurality of wireless power transmission schemes Generates a signaling message, controls the signaling message to be transmitted to the target device, and controls power to be transmitted to the target device when a response is received from the target device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless power transmission control apparatus and a wireless power transmission control method,

The following embodiments are directed to techniques for controlling a wireless power transmission device.

A mobile terminal such as a smart phone or a tablet PC can receive power wirelessly. There are a plurality of wireless charging techniques, which are not compatible with each other. There is a need for a technology that can support multiple wireless charging technologies at the same time.

On the other hand, Korean Patent Laid-Open Publication No. 10-2015-0060827 (filed on September 23, 2013, filed on Jun. 03, 2015, filed by Samsung Electronics, entitled: A method and an apparatus for the present invention). The Korean Patent Laid-Open Publication No. 2003-325886 discloses a method for establishing a wireless communication link between a coordinating transmitter and each receiver, applying a voltage to the coordinating transmitter, and configuring each receiver to measure an induced current in response to the applied voltage, Measuring respective mutual impedances between the coordinating transmitter and each receiver and calculating respective matching impedances for the coordinating transmitter and each receiver based on the corresponding mutual impedance, and for each receiver to calculate the respective matching impedances A method of wireless power transmission is disclosed in which each of the receivers transmits each matching impedance to each receiver, and the coordinating transmitter adjusts to have each of the matching impedances.

Embodiments may transmit power to a terminal supporting a plurality of wireless power receiving schemes. In addition, embodiments can transmit power to a plurality of terminals wirelessly, and can transmit power to each of a plurality of terminals when a plurality of terminals support different wireless power receiving methods.

A wireless power transfer control device according to one side includes a memory storing software operating to power a target device in a plurality of wireless power transmission schemes; And a controller for accessing the memory, wherein the software is further configured to, when the target device is sensed, to determine whether the target device is capable of responding to any one of the plurality of wireless power transmission schemes Generates a signaling message, controls the signaling message to be transmitted to the target device, and controls power to be transmitted to the target device when a response is received from the target device.

The software may generate a second signaling message corresponding to another one of the plurality of wireless power transmission schemes if a response to the signaling message is not received from the target device.

The software may control to stop transmission of the power when the target device is fully charged.

The software may control to generate accounting data for the power transmitted to the target device.

The software may determine whether the target device is authorized to receive the power and control to transmit the power if the power is available.

The software may control to stop transmission of the power when an object other than the target device receives the power.

The software may control to communicate with the target via at least one of an in-band communication and an out-band communication.

The plurality of wireless power transmission systems include a magnetic induction system and a resonance system.

A method for controlling a wireless power transmission according to one side includes the steps of generating a signaling message corresponding to one of a plurality of wireless power transmission schemes to identify a wireless power reception scheme supported by the target device when a target device is detected; Controlling the signaling message to be transmitted to the target device; And controlling power to be transmitted to the target device when a response of the target device is received.

And generating a second signaling message corresponding to another one of the plurality of wireless power transmission schemes if the response to the signaling message from the target device is not received.

And controlling the transmission of the power to be stopped when the target device is fully charged.

And controlling charging data for the power transmitted to the target device to be generated.

Determining whether the target device is authorized to receive the power, and controlling the power to be transmitted if the target device is authorized.

And controlling the transmission of the power to be stopped when an object other than the target device receives the power.

And communicating with the target via at least one of in-band communication and in-band communication.

The plurality of wireless power transmission schemes may include a magnetic induction scheme and a resonance scheme.

Embodiments may transmit wireless power to various terminals supporting different wireless power receiving schemes. In addition, embodiments may transmit wireless power to each of the terminals when the terminals support different wireless power receiving schemes.

1 is a block diagram illustrating a wireless power transmission control apparatus according to an embodiment of the present invention.
2 is a diagram for describing power transfer of a source device including a source device according to an embodiment.
3 is a diagram for explaining an example of power transmission of a source device according to an embodiment.
4 is a diagram for explaining another example of power transmission of a source device according to an embodiment.
5 is a view for explaining another example of power transmission of a source device according to an embodiment.
6 is a flowchart illustrating a method of controlling a wireless power transmission according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

1 is a block diagram illustrating a wireless power transmission control apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a wireless power transmission control apparatus 110 includes a memory 111 and a controller 112. The source device may include a wireless power transfer control device 110, an antenna 120, a communication interface 130, and an application processor 140.

The memory 111 stores software operating to power the target device in a plurality of wireless power transmission schemes. For example, the software may be firmware, and the memory 110 may be a ROM that is non-volatile memory. The plurality of wireless power transmission schemes may include, for example, a magnetic induction scheme and a resonance scheme. Standard specifications related to the magnetic induction method include the Power Matters Alliance (PMA) and the Wireless Power Consortium (WPC), and the standard specification related to the resonance method includes the A4WP (Alliance for Wireless Power). The wireless power transmission control device 110 may support a plurality of standard specifications.

The controller 112 accesses the memory 111. The controller 112 can access the memory 111 and execute the software.

<Checking the wireless power transmission method supported by the target device>

When a target device is detected, the software generates a signaling message corresponding to one of a plurality of wireless power transmission schemes to identify the wireless power reception scheme supported by the target device. The wireless power receiving system may be, for example, either a magnetic induction system or a resonance system. The target device may support either PMA, WPC, and A4WP. In addition, the target device may support a plurality of standard specifications.

The software may generate a signaling message corresponding to one of a plurality of standard specifications, e.g., PMA, WPC, and A4WP.

The software controls the signaling message to be sent to the target device. For example, the software may control the communication interface 130 to cause the communication interface 130 to send a signaling message to the target device.

When a response is received from the target device, the software controls the power to be transmitted to the target device. For example, suppose that the signaling message sent to the target device corresponds to A4WP. If the target device supports A4WP, it can send a response to the signaling message, and if the target device does not support A4WP, it can not send a response to the signaling message to the wireless power transmission control device 110. If there is a response of the target device, the software can confirm the wireless power receiving method of the target device.

The software can control the antenna 120 to transmit power. In FIG. 1, one antenna 120 is shown, but this is only an example according to one embodiment, and the antenna 120 may be a plurality of antennas. For example, the number of antennas 120 may correspond to the number of wireless power transmission schemes supported by the wireless power transmission control apparatus. In other words, the number of antennas 120 may correspond to the number of standard specifications supported by the wireless power transmission control apparatus.

If a response to the signaling message from the target device is not received, the software may generate a second signaling message corresponding to the other of the plurality of wireless power transmission schemes. For example, if the signaling message sent to the target device corresponds to A4WP, and the target device supports WPC, the target device can not read the signaling message corresponding to A4WP. For this reason, the target device can not transmit a response to the wireless power transmission control device 110. [ In this case, the software may generate a second signaling message corresponding to A4WP and other standard specifications. Software can control the communication interface 130 to send a second signaling message and if a response to the second signaling message is received from the target device, the software can verify the wireless power reception scheme of the target device.

&Lt; Communication with target device >

The source device may communicate with the target device via at least one of an in-band communication and an out-of-band communication via the communication interface 130. In the case of in-band communication, the source device can communicate with the target device through the frequency used for the transmission of the radio power, and in the case of out-band communication, And can communicate with the device.

If the target device is fully charged, the software may control the wireless power transfer control device 110 to no longer transmit wireless power to the target device. For example, if the target device is fully charged, the target device may send a message to the source device including the wireless power transmission control device 110, and the source device may not transmit power under the control of the software .

&Lt; Wireless power billing for target device >

The software can control to generate accounting data for the power transmitted to the target device. For example, the wireless power transfer control device 110 may include an I2C port and may communicate with other integrated circuits and / or other application processors 140 via the I2C port. When the target device is charged, billing data can be generated by execution of the software. Alternatively, when the target device is charged, the software may generate control signals and may transmit control signals to other integrated circuits and / or other application processors 140 via the I2C port. The application processor 140 may generate the billing data based on the control signal. The billing data can be transmitted to the target device, and the target device can receive the billing data and output it to the display.

<Authorization authentication for target device>

In addition, the software can determine whether the target device is authorized to receive power and control to transmit power when authorized. For example, the wireless power transfer control device 110 may communicate with other integrated circuits and / or application processors 140 via the I2C port. The software can determine if the target device is authorized to receive power. Alternatively, the software may cause the other integrated circuit and / or application processor 140 to determine whether the target device is authorized to receive power. More specifically, the software may generate control signals and may transmit control signals to other integrated circuits and / or application processors 140 via the I2C port. The application processor 140 may determine whether the target device is authorized to receive power and if so, power may be transmitted to the target device. If not, another integrated circuit and / or application processor 140 may cause a message to be sent indicating that wireless charging is not available.

The other integrated circuit and / or application processor 140 may use the identification information of the target device to determine whether the target device is authorized to receive power. Here, the identification information of the target device may be transmitted to the source device during signaling between the source device and the target device. Other integrated circuits and / or application processors 140 may compare the identification information to a table. Here, the table may include identification information of target devices that are authorized to receive power.

&Lt; Wireless power transmission control for non-target object >

In one embodiment, while power is being transferred to the target device, objects other than the target device may be located in the charge coverage of the source device. At this time, the software can control to stop the transmission of the power. For example, assume that the source device transmits a power of 100. When the target device receives the power 100, the target device can notify the source device of the amount of power received by the target device. That is, a message indicating that the power 100 has been received may be transmitted to the source device. At this time, if an object such as a conductor is placed in charge coverage, the target device may not receive power 100 by the object even if the source device transmits power 100. [ That is, a part of the transmission power of the source device can be directed to the object. The target device can transmit the received power amount to the source device. At this time, the source device can confirm that the transmission power amount of the source device is different from the reception power amount of the target device, and it can be confirmed that there is an object that is not coupled with the source device itself. Based on the acknowledgment, the source device may stop transmitting power.

The source device can compare the information of the transmission power outputted through the antenna 120 and the reception power information included in the message transmitted from the target device and can stop the transmission of the power when the transmission power amount and the reception power amount do not match .

<Target device supporting more than one wireless power scheme>

In one embodiment, the target device may support more than one wireless power reception scheme. For example, the target device may support both WPC and PMA. Here, when the source device transmits a signaling message corresponding to the WPC to the target device, the target device transmits a response to the signaling message to the source device. Since the source device has confirmed the wireless power receiving method of the target device, it may not transmit the signaling message corresponding to the PMA to the target device. Alternatively, the source device may send a signaling message corresponding to the PMA to the target device. The target device may send a response of the signaling message corresponding to the PMA to the source device. The source device can confirm that the target device supports WPC and PMA, determine the WPC and the PMA as the wireless power transmission method, and transmit the power to the target device.

2 is a diagram for describing power transfer of a source device including a source device according to an embodiment.

Referring to FIG. 2, the source device 210 may transmit power to a plurality of target devices 220, 230, and 240 through an antenna 211. The source device 210 may support a plurality of wireless power transmission schemes. For example, the source device 210 may support a magnetic induction method and a resonance method. In addition, the source device 210 may support standard specifications of WPC, PMA, and A4WP. The source device 210 may support a plurality of standard specifications and may transmit power to a plurality of target devices 220, 230, and 240 that support different standard specifications.

The source device 210 can confirm the wireless power reception scheme of the plurality of target devices 220, 230, and 240. The source device 210 may send a signaling message to the plurality of target devices 220, 230, and 240. In addition, the source device 210 may transmit a signaling message to the target device in a time sharing manner. For example, the source device 210 may send a first signaling message corresponding to the WPC to a plurality of target devices 220, 230, and 240. When the target device 220 transmits a response to the first signaling message to the source device 210, the source device 210 can verify that the target device 220 supports WPC. Since the source device 210 has not received a response from the target devices 230 and 240, it may send a second signaling message corresponding to the PMA to the target devices 230 and 240. When the target device 230 sends a response to the second signaling message to the source device 210, the source device 210 can verify that the target device 230 supports the PMA. Since the source device 210 has not received a response from the target device 240, it may send a third signaling message corresponding to the A4WP to the target device 240. When the target device 230 transmits a response to the third signaling message to the source device 210, the source device 210 can verify that the target device 240 supports A4WP.

The source device 210 can transmit power to the plurality of target devices 220, 230, and 240 when the wireless power reception scheme of the plurality of target devices 220, 230, and 240 is confirmed. The source device 210 may transmit the power according to the WPC to the target device 220 and may transmit the power according to the PMA to the target device 230 and may transmit the power according to the A4WP to the target device 240 .

Since the matters described with reference to FIG. 1 can be applied to the matters described with reference to FIG. 2, detailed description will be omitted.

3 is a diagram for explaining an example of power transmission of a source device according to an embodiment. An example of the power transmission shown in FIG. 3 may be power transmission according to WPC.

Referring to FIG. 3, the source device 300 includes a communication and control unit 310, a power conversion unit 320, and a transmission coil 330. Although not shown in FIG. 3, the source device 300 may further include a system unit.

The source may supply power to the power conversion unit 320. [ When the target device including the receiving coil approaches the source device 300, the current flowing in the transmitting coil 330 may change. Since the transmission coil operates as a primary coil and the reception coil operates as a secondary coil, an induced electromotive force is generated in the secondary coil, and the target device can be charged by the induced electromotive force.

The target device can fluctuate the load for communication and transmit the packet to the source device. The communication and control unit 310 can demodulate the packet.

The system portion may include a plurality of operating states. For example, the system portion may include a Selection state, a Ping state, an Identification / Configuration state, and a Power Transfer state.

When the system unit operates in the selected state, the source device 300 can check whether there is an object in the charge coverage. If the object is in charge coverage, the system portion can enter the ping state and the source device 300 can send a message to the object. At this time, the message transmitted to the object may be the signaling message described with reference to FIGS. When a response of an object is received, the object can be identified as a target device capable of receiving power. The system unit can enter the identification / setting state, the source device 300 can identify the target device, and can obtain the setting information for power transmission. If the target device is identified and configuration information is obtained, the system portion may enter a power transfer state and the source device 300 may transmit power to the target device.

The power transmission and source devices described with reference to FIG. 3 are exemplary only in accordance with an embodiment, and the power transmission and source devices are not limited to the examples described above.

4 is a diagram for explaining another example of power transmission of a source device according to an embodiment. An example of the power transmission shown in Fig. 4 may be power transmission according to A4WP.

4, the source device 400 includes a power unit 410, an amplification unit 420, a matching circuit 430, and a source resonator 440. Although not shown in FIG. 4, the source device 400 may further include a communication unit. The communication unit may include a short-range communication module such as Zigbee, Bluetooth or the like. Further, the communication unit can transmit data to the target device through out-band communication.

The power unit 410 can receive an AC signal from the outside, and can generate electric power using an AC signal. The power unit 410 can rectify the AC signal to output a DC voltage. The power unit 410 may provide the DC voltage to the amplification unit 420.

The amplification unit 420 may convert the DC voltage to the AC voltage based on the switching pulse signal. Here, the amplifier 420 can generate an AC voltage having a resonant frequency.

The matching circuit 430 may set the resonance bandwidth of the source resonator 440 or the impedance matching frequency of the source resonator 440. In addition, the matching circuit 430 can adjust the resonance frequency of the source resonator 440. Since the resonance frequency is defined based on the capacitance and the inductance, the matching circuit 430 can adjust the resonance frequency by adjusting the capacitance and / or the inductance. The Q-factor of the source resonator 440 can be determined according to the resonant bandwidth of the source resonator or the impedance matching frequency of the source resonator.

The source resonator 440 may deliver electromagnetic energy to the target device. The source resonator 440 may resonate within the resonant bandwidth.

The power transmission and source devices described with reference to FIG. 4 are exemplary only in accordance with an embodiment, and the power transmission and source devices are not limited to the examples described above.

5 is a view for explaining another example of power transmission of a source device according to an embodiment.

Referring to FIG. 5, the target device 520 may be included in the electric vehicle 500, and the electric power transmitted from the source device 510 may be used to charge the battery of the electric vehicle 500.

The source device 510 sends a signaling message to the target device 520 to confirm the wireless power reception scheme of the target device 520. [ When a response to the signaling message is received from the target device 520 and the wireless power reception scheme of the target device 520 is confirmed, the source device 510 transmits power.

Before transmitting the power, the source device 510 can confirm whether or not the target device 520 is authorized to receive power. If so, the source device 510 may send power to the target device 520.

When the battery of the electric vehicle 500 is fully charged, the source device 510 can stop transmission of electric power. In addition, the source device 510 may generate accounting data for the transmitted power and may transmit the accounting data to the target device.

1 through 4 can be applied to the matters described with reference to FIG. 5, detailed description thereof will be omitted.

6 is a flowchart illustrating a method of controlling a wireless power transmission according to an embodiment. A wireless power transmission control method according to one embodiment can be performed by a wireless power transmission control apparatus.

When the target device is detected, the wireless power transmission control apparatus generates a signaling message corresponding to any one of a plurality of wireless power transmission schemes (610) to identify a wireless power reception scheme supported by the target device,

The wireless power transmission control device controls (620) a signaling message to be transmitted to the target device.

The wireless power transfer control device controls (630) power to be transmitted to the target device when a response of the target device is received.

1 through 5 can be applied to the matters described with reference to FIG. 6, detailed description thereof will be omitted.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA) , A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI &gt; or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (16)

A wireless power transmission control device comprising:
A memory for storing software operable to power a target device in a plurality of wireless power transmission schemes; And
The controller accessing the memory
Lt; / RTI &gt;
The software,
Generating a signaling message corresponding to one of the plurality of wireless power transmission schemes to identify a wireless power reception scheme supported by the target device when the target device is detected,
Controlling the signaling message to be transmitted to the target device,
And control to transmit power to the target device when a response is received from the target device.
Wireless power transmission control device.
The method according to claim 1,
The software,
Generating a second signaling message corresponding to another one of the plurality of wireless power transmission schemes when a response to the signaling message from the target device is not received,
Wireless power transmission control device.
The method according to claim 1,
The software,
And control to stop transmission of the power when the target device is fully charged.
Wireless power transmission control device.
The method according to claim 1,
The software,
And controlling charging data for the power transmitted to the target device to be generated,
Wireless power transmission control device.
The method according to claim 1,
The software,
Determine whether the target device is authorized to receive the power and control to transmit the power if the target device is authorized;
Wireless power transmission control device.
The method according to claim 1,
The software,
And controls to stop transmission of the power when an object other than the target device receives the power.
Wireless power transmission control device.
The method according to claim 1,
The software,
In-band communication and out-of-band communication,
Wireless power transmission control device.
The method according to claim 1,
Wherein the plurality of wireless power transmission schemes include:
Including a magnetic induction type and a resonance type,
Wireless power transmission control device.
A radio power transmission control method of a radio power transmission control apparatus,
Generating a signaling message corresponding to one of a plurality of wireless power transmission schemes to identify a wireless power reception scheme supported by the target device when a target device is detected
Controlling the signaling message to be transmitted to the target device; And
Controlling power to be transmitted to the target device when a response of the target device is received
/ RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
Generating a second signaling message corresponding to another of the plurality of wireless power transmission schemes if the response to the signaling message from the target device is not received
&Lt; / RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
When the target device is fully charged, controlling to stop the transmission of the power
&Lt; / RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
Controlling to generate charging data for the power transmitted to the target device
&Lt; / RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
Determining whether the target device is authorized to receive the power and controlling the power to be transmitted if the target device is authorized
&Lt; / RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
Controlling to stop transmission of the power when an object other than the target device receives the power
&Lt; / RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
Controlling to communicate with the target through at least one of in-band communication and out-band communication
&Lt; / RTI &gt;
Wireless power transmission control method.
10. The method of claim 9,
Wherein the plurality of wireless power transmission schemes include:
Including a magnetic induction type and a resonance type,
Wireless power transmission control method.

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