WO2018117578A1 - Dispositif d'émission de puissance sans fil et dispositif de réception de puissance sans fil - Google Patents

Dispositif d'émission de puissance sans fil et dispositif de réception de puissance sans fil Download PDF

Info

Publication number
WO2018117578A1
WO2018117578A1 PCT/KR2017/014974 KR2017014974W WO2018117578A1 WO 2018117578 A1 WO2018117578 A1 WO 2018117578A1 KR 2017014974 W KR2017014974 W KR 2017014974W WO 2018117578 A1 WO2018117578 A1 WO 2018117578A1
Authority
WO
WIPO (PCT)
Prior art keywords
wireless power
receiver
transmitter
information
wireless
Prior art date
Application number
PCT/KR2017/014974
Other languages
English (en)
Korean (ko)
Inventor
채용석
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Publication of WO2018117578A1 publication Critical patent/WO2018117578A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer

Definitions

  • the present embodiment relates to a wireless power transmission technology, and relates to a wireless power transmitter and a wireless power receiver.
  • Portable terminals such as mobile phones and laptops include a battery that stores power and circuits for charging and discharging the battery. In order for the battery of the terminal to be charged, power must be supplied from an external charger.
  • the terminal is supplied with commercial power and converted into a voltage and a current corresponding to the battery to supply electrical energy to the battery through the terminal of the battery.
  • Supply method This terminal supply method is accompanied by the use of a physical cable (cable) or wire. Therefore, when handling a lot of terminal supply equipment, many cables occupy considerable working space, are difficult to organize, and are not good in appearance.
  • the terminal supply method may cause problems such as instantaneous discharge phenomenon due to different potential difference between the terminals, burnout and fire caused by foreign substances, natural discharge, deterioration of battery life and performance.
  • a charging system (hereinafter, referred to as a "wireless charging system") and a control method using a method of transmitting power wirelessly have been proposed.
  • the wireless charging system was not pre-installed in some portable terminals in the past and the consumer had to separately purchase a wireless charging receiver accessory, the demand for the wireless charging system was low, but the number of wireless charging users is expected to increase rapidly. It is expected to be equipped with wireless charging function.
  • the wireless charging system includes a wireless power transmitter for supplying electrical energy through a wireless power transmission method and a wireless power receiver for charging the battery by receiving the electrical energy supplied from the wireless power transmitter.
  • the wireless charging system may transmit power by at least one wireless power transmission method (eg, electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method, etc.).
  • wireless power transmission method eg, electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method, etc.
  • the wireless power transmission scheme may use various wireless power transmission standards based on an electromagnetic induction scheme that generates a magnetic field in the power transmitter coil and charges using an electromagnetic induction principle in which electricity is induced in the receiver coil under the influence of the magnetic field.
  • the electromagnetic induction wireless power transmission standard may include an electromagnetic induction wireless charging technology defined by the Wireless Power Consortium (WPC) or / and the Power Matters Alliance (PMA).
  • the wireless power transmission method may use an electromagnetic resonance method of transmitting power to a wireless power receiver located in close proximity by tuning a magnetic field generated by a transmission coil of the wireless power transmitter to a specific resonance frequency.
  • the electromagnetic resonance method may include a wireless charging technology of a resonance method defined in an A4WP (Alliance for Wireless Power) standard device, which is a wireless charging technology standard device.
  • the wireless power transmission method may use an RF wireless power transmission method that transmits power to a wireless power receiver located at a far distance by putting energy of low power in an RF signal.
  • the present embodiment is devised to solve the above-described problems of the related art, and an object of the present embodiment is to provide a wireless power transmitter and a wireless power receiver.
  • Another object of the present embodiment is to provide a wireless power transmitter and a wireless power receiver to enable a device to be charged to execute various applications even during wireless charging.
  • Still another object according to the present embodiment is to provide a wireless power transmitter and a wireless power receiver to execute various applications while minimizing the operating load of the wireless power transmitter and the wireless power receiver during wireless charging.
  • the wireless power transmitter includes a power transmitter including a transmission coil; A power converter converting power intensity; A storage unit storing external device information that can be connected to the wireless power receiver; A communication unit for communicating with the wireless power receiver; And a controller configured to control a charging mode for the wireless power receiver and to provide the external device information to the wireless power receiver.
  • the wireless power receiver includes a receiving coil; Communication unit for performing communication with the wireless power transmission device; And a controller for identifying information of an external device connectable through the information received from the communication unit, wherein the communication unit outputs the identified external device information to an electronic device.
  • the wireless power transmitter and the wireless power receiver and the operation method thereof according to the present embodiment will be described below.
  • This embodiment has the advantage of providing a wireless power transmitter and a wireless power receiver.
  • the present embodiment can provide general charging or fast charging to provide selective charging time and efficiency.
  • the present embodiment may allow a receiver including a wireless power receiver to execute various applications while minimizing an operation load on the wireless power transmitter even during wireless charging.
  • the present embodiment can minimize the operating load of the wireless power receiver while performing wireless charging, while enabling efficient wireless charging and supporting the receiver to execute various applications.
  • the multi-tasking may be performed by enabling the receiver to execute various applications during wireless charging.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment.
  • FIG. 2 is a block diagram illustrating a wireless charging system according to another embodiment.
  • FIG. 3 is a diagram for describing a detection signal transmission procedure in a wireless charging system according to an embodiment.
  • FIG. 4 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC standard.
  • 5 is a state transition diagram for explaining a wireless power transmission procedure defined in the PMA standard.
  • FIG. 6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
  • FIG. 7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG. 6.
  • FIG. 8 is a diagram for describing a method of modulating and demodulating a wireless power signal, according to an exemplary embodiment.
  • FIG. 9 is a diagram illustrating a packet format according to a wireless power transmission procedure according to one embodiment.
  • FIG. 10 is a diagram illustrating a type of a packet that can be transmitted in a ping step by a wireless power receiver according to a wireless power transmission procedure according to an embodiment.
  • FIG. 11 illustrates a message format of an identification packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 12 illustrates a message format of a configuration packet and a power control suspend packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 13 is a diagram illustrating a structure of a charging mode packet for requesting a charging mode change according to a wireless power transmission procedure according to an embodiment.
  • FIG. 14 is a diagram for describing a wireless charging method in a wireless power transmitter, according to an embodiment.
  • 15 is a diagram for describing a wireless charging method in a wireless charging system according to one embodiment.
  • 16 is a view for explaining a wireless charging method in a wireless power receiver according to another embodiment.
  • 17 is a view illustrating a wireless charging method in a wireless charging system according to another embodiment.
  • FIG. 18 is a diagram illustrating an operation of an electronic device including a wireless power receiver according to another embodiment.
  • 19 is an exemplary view for explaining a connection state of a wireless charging system according to an embodiment.
  • 20 is a diagram illustrating a wireless charging transmission coil according to an embodiment.
  • FIG. 21 illustrates three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils, according to an exemplary embodiment.
  • FIG. 22 illustrates a wireless power transmitter including a plurality of coils and a single drive circuit according to an embodiment.
  • FIG. 23 is a diagram illustrating a plurality of switches connecting one of a plurality of transmission coils to a drive circuit according to an exemplary embodiment.
  • the present invention is not necessarily limited to these embodiments, although all of the components constituting the embodiments are described as being combined or operating in combination. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, although all of the components may be implemented in one independent hardware, each or all of the components may be selectively combined to perform some or all functions combined in one or a plurality of hardware. It may be implemented as a computer program having a. Codes and code segments constituting the computer program may be easily inferred by those skilled in the art. Such a computer program may be stored in a computer readable storage medium and read and executed by a computer, thereby implementing the embodiments.
  • the storage medium of the computer program may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.
  • the apparatus for transmitting wireless power on the wireless power charging system is a wireless power transmitter, wireless power transmitter, wireless power transmitter, wireless power transmitter, transmitter, transmitter, transmitter, transmitting side for convenience of description.
  • a wireless power transmitter, a wireless power transmitter, and a wireless charging device will be used in combination.
  • a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a receiver terminal, a receiver, a receiver, a receiver Terminals and the like may be used interchangeably.
  • Wireless charging apparatus may be configured in the form of a pad, a cradle, an access point (AP), a small base station, a stand, a ceiling buried, a wall, etc., one transmitter receives a plurality of wireless power It may also transmit power to the device.
  • AP access point
  • AP small base station
  • stand a stand
  • ceiling buried
  • wall etc.
  • the wireless power transmitter may not only be used on a desk or a table, but also may be developed and applied to an automobile and used in a vehicle.
  • the wireless power transmitter installed in the vehicle may be provided in the form of a cradle that can be fixed and mounted simply and stably.
  • Terminal is a mobile phone (smart phone), smart phone (smart phone), laptop computer (laptop computer), digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, MP3 player, electric It may be used in small electronic devices such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing bobber, and the like, but is not limited to this.
  • the term “terminal” or “device” may be used interchangeably.
  • the wireless power receiver according to another embodiment may be mounted in a vehicle, an unmanned aerial vehicle, an air drone, or the like.
  • the wireless power receiver according to the embodiment may be provided with at least one wireless power transmission scheme, and may simultaneously receive wireless power from two or more wireless power transmitters.
  • the wireless power transmission method may include at least one of the electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method.
  • the wireless power transmitter and the wireless power receiver constituting the wireless power system may exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication.
  • in-band communication and BLE communication may be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, or the like.
  • the wireless power receiver may transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching ON / OFF the current induced through the receiving coil in a predetermined pattern.
  • the information transmitted by the wireless power receiver may include various state information including received power strength information.
  • the wireless power transmitter may calculate the charging efficiency or the power transmission efficiency based on the received power strength information.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment.
  • a wireless charging system includes a wireless power transmitter 10 that largely transmits power wirelessly, a wireless power receiver 20 that receives the transmitted power, and an electronic device 30 that receives the received power. Can be configured.
  • the wireless power transmitter 10 and the wireless power receiver 20 may perform in-band communication for exchanging information using the same frequency band as the operating frequency used for wireless power transmission.
  • the wireless power transmitter 10 and the wireless power receiver 20 perform out-of-band communication for exchanging information using a separate frequency band different from an operating frequency used for wireless power transmission. I might.
  • the information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other.
  • the status information and control information exchanged between the transmitting and receiving end will be more clear through the description of the embodiments to be described later.
  • the in-band communication and the out-of-band communication may provide bidirectional communication, but are not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may provide one-way communication or half-duplex communication.
  • the unidirectional communication may be the wireless power receiver 20 transmitting information only to the wireless power transmitter 10, but is not limited thereto.
  • the wireless power transmitter 10 may transmit the information to the wireless power receiver 20. It may be.
  • bidirectional communication between the wireless power receiver 920 and the wireless power transmitter 10 is possible, but at one time, only one device may transmit information.
  • the wireless power receiver 20 may obtain various state information of the electronic device 30.
  • the state information of the electronic device 30 may include current power usage information, information for identifying a running application, CPU usage information, battery charge state information, battery output voltage / current information, and the like. If not, information that can be obtained from the electronic device 30 and can be utilized for wireless power control is sufficient.
  • the wireless power receiver 20 may output various information obtained from the wireless power transmitter 10 to the electronic device 30.
  • the electronic device 30 may include identification information about an external output device that may be connected.
  • the identification information may be a MAC address, an IP address, or the like of an external device.
  • the external device may include a speaker, a display device, and the like.
  • the wireless power transmitter 10 may provide identifier information or connection information that can be connected to an external device.
  • the wireless power receiver 20 may inform the electronic device 30 when the connected wireless power transmitter 10 provides information on a pre-registered external device.
  • the electronic device 30 may display information on an external device and information on whether the external device is connected through a predetermined display means, for example, a liquid crystal display. Therefore, the user of the electronic device 30 may select the connection information and the connection request button with the external device displayed on the display means.
  • the wireless power transmitter 10 may operate in a wireless charging mode that provides power for charging the electronic device 30 to the wireless power receiver 20 while the electronic device 30 may connect with an external device to transmit data. To run the application.
  • the electronic device 3 automatically performs the wireless power receiver 20 through the wireless power transmitter 10 according to a result of communication and negotiation between the wireless power transmitter 10 and the wireless power receiver 20 without a user's separate request or input. It is operable to automatically connect with the external device based on the information and the connection information of the external device received in the).
  • a predetermined packet indicating whether to support fast charging may be transmitted to the wireless power receiver 20.
  • the wireless power receiver 20 may inform the electronic device 30 when it is determined that the connected wireless power transmitter 10 supports the fast charging mode.
  • the electronic device 30 may indicate that high-speed charging is possible through a predetermined display means provided, for example, a liquid crystal display.
  • the user of the electronic device 3 may control the wireless power transmitter 10 to operate in the fast charging mode by selecting a predetermined fast charge request button displayed on the display means.
  • the electronic device 30 may transmit a predetermined quick charge request signal to the wireless power receiver 20.
  • the wireless power receiver 20 may generate a charging mode packet corresponding to the received fast charge request signal and transmit the generated charging mode packet to the wireless power transmitter 10 to convert the normal low power charging mode into the fast charging mode.
  • the electronic device 30 may automatically operate and switch to a fast charging mode according to a communication and negotiation result of the wireless power transmitter 10 and the wireless power receiver 20 without a separate request or input from the user. In addition, the electronic device 30 may automatically operate and switch to a general low power mode according to a communication negotiation result of the wireless power transmitter 10 and the wireless power receiver 20 without a user's separate request or input.
  • FIG. 2 is a block diagram illustrating a wireless charging system according to another embodiment.
  • the wireless power receiver 20 may be configured with a plurality of wireless power receivers, and a plurality of wireless power receivers are connected to one wireless power transmitter 10 so that wireless charging is possible. You can also do In this case, the wireless power transmitter 10 may distribute and transmit power to a plurality of wireless power receivers in a time division manner, but is not limited thereto. As another example, the wireless power transmitter 10 may be allocated to the wireless power receiver and the stars. The power may be distributed and transmitted to a plurality of wireless power receivers by using different frequency bands, but is not limited thereto. In another example, the wireless power transmitter 10 uses different frequency bands allocated for each wireless power receiver. The power can be distributed and transmitted to a plurality of wireless power receivers.
  • the number of wireless power receivers that can be connected to one wireless power transmitter is adapted based on at least one of the required power for each wireless power receiver, the state of charge of the battery, the power consumption of the electronic device, and the available power of the wireless power transmitter.
  • the wireless power transmitters 10 may be all transmitted to the plurality of wireless power receivers 20 that are connected.
  • the wireless power receiver 20 outputs information of the external device to be transmitted to each electronic device 30.
  • the wireless power transmitter 10 may include a plurality of wireless power transmitters.
  • the wireless power receiver 20 may be simultaneously connected to a plurality of wireless power transmitters, and may simultaneously receive power from the connected wireless power transmitters and perform charging.
  • the number of wireless power transmitters connected to the wireless power receiver 2 may be adaptively determined based on the required power of the wireless power receiver 2, the state of charge of the battery, the power consumption of the electronic device, and the available power of the wireless power transmitter. Can be.
  • FIG 3 is a view for explaining a detection signal transmission procedure in a wireless charging system according to an embodiment.
  • the wireless power transmitter may be equipped with three transmission coils 111, 112, and 113. Each transmission coil may overlap some other regions with other transmission coils, and the wireless power transmitter may detect a predetermined sensing signal 117, 127 for detecting the presence of the wireless power receiver through each transmission coil, for example, Digital ping signals are sent sequentially in a predefined order.
  • the wireless power transmitter sequentially transmits the detection signal 117 through the primary detection signal transmission procedure illustrated in FIG. 110, and receives a signal strength indicator from the wireless power receiver 115.
  • the strength indicator 116 (or signal strength packet) may identify the transmitting coils 111, 112 that have been received.
  • the wireless power transmitter sequentially transmits the detection signal 127 through the secondary detection signal transmission procedure shown in FIG. 120, and transmits power among the transmission coils 111 and 112 where the signal strength indicator 126 is received.
  • the reason why the wireless power transmitter performs two sensing signal transmission procedures is to more accurately identify which transmitting coil is well aligned with the receiving coil of the wireless power receiver.
  • the wireless power transmitter Based on the signal strength indicator 126 received at each of the first transmitting coil 111 and the second transmitting coil 112 selects the most energetic transmitting coil, and performs wireless charging using the selected transmitting coil. .
  • FIG. 4 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC standard.
  • power transmission from a transmitter to a receiver according to the WPC standard is largely selected as a selection phase 410, a ping phase 42, an identification and configuration phase 430, It may be divided into a power transfer phase 440.
  • the selection step 410 may be a step of transitioning when a specific error or a specific event is detected while starting or maintaining power transmission. As such, specific errors and specific events will become apparent from the following description.
  • the transmitter may monitor whether an object exists on the interface surface. If the transmitter detects that an object is placed on the interface surface, it may transition to the ping step 420 (S401). In the selection step 410, the transmitter transmits a very short pulse of an analog ping signal, and may detect whether an object exists in an active area of the interface surface based on a change in current of a transmitting coil.
  • the transmitter activates the receiver when an object is detected, and sends a digital ping to identify whether the receiver is a receiver that is compatible with the WPC standard. If in step 420 the transmitter does not receive a response signal (eg, signal strength indicator) for the digital ping from the receiver, it may transition back to selection step 410 (S402). In the ping step 420, when the transmitter receives a signal from the receiver indicating that power transmission is completed, that is, a charging completion signal, it may transition to the selection step 410 (S403).
  • a response signal eg, signal strength indicator
  • the transmitter may transition to the identification and configuration step 430 for collecting receiver identification and receiver configuration and status information (S404).
  • the sender receives an unwanted packet or unexpected packer, the desired packet has not been received for a predefined time, a packet transmission error or a power transmission contract If not set (no power transfer contract) it may transition to the selection step (410) (S405).
  • the transmitter may transition to the power transmission step 440 for transmitting the wireless power (S406).
  • the transmitter receives an unexpected packet, the desired packet has not been received for a predefined time, or a violation of a preset power transfer contract occurs. transfer contract violation), if the filling is completed, the transition to the selection step (410) (S407).
  • the transmitter may transition to the identification and configuration step 430 (S408).
  • the power transmission contract may be set based on state and characteristic information of the transmitter and the receiver.
  • the transmitter state information may include information about the maximum amount of power that can be transmitted, information about the maximum number of receivers that can be accommodated, and the receiver state information may include information about required power.
  • the transmitter may transmit information including the address, connection information, communication environment, etc. of the pre-stored external device to the receiver.
  • 5 is a state transition diagram for explaining a wireless power transmission procedure defined in the PMA standard.
  • power transmission from a transmitter to a receiver according to the PMA standard is largely performed in a standby phase (Standby Phase, 510), a digital ping phase (520), an identification phase (Identification Phase, 530), and power transmission. It may be divided into a power transfer phase 540 and an end of charge phase 550.
  • the waiting step 510 may be a step of transitioning when a specific error or a specific event is detected while performing a receiver identification procedure for power transmission or maintaining power transmission.
  • specific errors and specific events will be apparent from the following description.
  • the transmitter may monitor whether an object exists on a charging surface. If the transmitter detects that an object is placed on the charging surface or the RXID retry is in progress, the transmitter may transition to the digital ping step 520 (S501).
  • RXID is a unique identifier assigned to a PMA compatible receiver.
  • the transmitter transmits a very short pulse of analog ping, and an object is placed on the active surface of the interface surface-for example, the charging bed-based on the current change of the transmitting coil. You can detect if it exists.
  • the transmitter transitioned to digital ping step 520 sends a digital ping signal to identify whether the detected object is a PMA compatible receiver.
  • the receiver may modulate the received digital ping signal according to the PMA communication protocol to transmit a predetermined response signal to the transmitter.
  • the response signal may include a signal strength indicator indicating the strength of the power received by the receiver.
  • the transmitter may transition to the identification step 530 (S502).
  • the transmitter may transition to the standby step 510.
  • the Foreign Object may be a metallic object including coins, keys, and the like.
  • the transmitter may transition to the waiting step 510 if the receiver identification procedure fails or the receiver identification procedure needs to be re-executed and if the receiver identification procedure has not been completed for a predefined time ( S504).
  • the transmitter transitions to the power transmission step 540 in the identification step 530 and starts charging (S505).
  • the transmitter goes to standby step 510 if the desired signal is not received within a predetermined time (Time Out), or if the FO is detected or the voltage of the transmitting coil exceeds a predefined threshold. It may transition (S506).
  • the transmitter may transition to the charging completion step 550 (S507).
  • the transmitter may transition to the standby state 510 (S509).
  • the transmitter may transition from the charging completion step 550 to the digital ping step 520 (S510).
  • the transmitter when the transmitter receives an end of charge (EOC) request from the receiver, the transmitter may transition to the charging completion step 550 (S508 and S511).
  • EOC end of charge
  • FIG. 6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
  • the wireless power transmitter 600 may include a power converter 610, a power transmitter 620, a communicator 630, a controller 640, and a sensor 650.
  • the configuration of the wireless power transmitter 600 is not necessarily an essential configuration, and may include more or fewer components.
  • the power converter 610 may perform a function of converting the power into power of a predetermined intensity.
  • the power converter 610 may be configured to include a DC / DC converter 611, the amplifier 612.
  • the DC / DC converter 611 may perform a function of converting DC power supplied from the power supply unit 660 into DC power having a specific intensity according to a control signal of the controller 640.
  • the sensing unit 650 may measure the voltage / current of the DC-converted power and provide the same to the control unit 640.
  • the sensing unit 650 may measure the internal temperature of the wireless power transmitter 600 for determining whether overheating occurs, and provide the measurement result to the controller 640.
  • the controller 640 may adaptively block power supply from the power supply unit 650 or block power supply to the amplifier 612 based on the voltage / current value measured by the sensing unit 650. have.
  • one side of the power converter 610 may further include a predetermined power cutoff circuit for cutting off the power supplied from the power supply 650 or cutting off the power supplied to the amplifier 612.
  • the amplifier 612 may adjust the intensity of the DC / DC converted power according to the control signal of the controller 640.
  • the controller 640 may receive power reception state information and / or power control signal of the wireless power receiver through the communication unit 640, and may be based on the received power reception state information or (and) power control signal.
  • the amplification factor of the amplifier 612 can be dynamically adjusted.
  • the power reception state information may include, but is not limited to, strength information of the rectifier output voltage and strength information of a current applied to the receiving coil.
  • the power control signal may include a signal for requesting power increase, a signal for requesting power reduction, and the like.
  • the power transmitter 620 may include a multiplexer 621 (or a multiplexer) and a transmission coil 622.
  • the power transmitter 620 may further include a carrier generator (not shown) for generating a specific operating frequency for power transmission.
  • the carrier generator may generate a specific frequency for converting the output DC power of the amplifier ( ⁇ 12) received through the multiplexer 621 into AC power having a specific frequency.
  • the AC signal generated by the carrier generator is mixed with the output terminal of the multiplexer ( ⁇ 21), AC power is generated, but this is only one embodiment, and the other example is the amplifier 612. Note that it may be mixed before or after.
  • the power transmitter 620 includes a multiplexer 621 and a plurality of transmit coils 622—that is, a first to control the output power of the amplifier 612 to be transmitted to the transmit coil. To n-th transmission coils.
  • the controller 640 may transmit power through time division multiplexing for each transmission coil.
  • three wireless power receivers i.e., the first to third wireless power receivers, are each identified through three different transmitting coils, i.e., the first to third transmitting coils.
  • the controller 640 may control the multiplexer 621 to control power to be transmitted through a specific transmission coil in a specific time slot.
  • the amount of power transmitted to the corresponding wireless power receiver may be controlled according to the length of the time slot allocated to each transmitting coil, but this is only one embodiment.
  • By controlling the amplification factor of the amplifier 612 of the wireless power receiver may be controlled to transmit power.
  • the controller 640 may control the multiplexer 621 to sequentially transmit the sensing signals through the first to nth transmitting coils 622 during the first sensing signal transmission procedure.
  • the controller 640 may identify a time point at which the detection signal is transmitted by using the timer 655.
  • the control unit 640 controls the multiplexer 621 to detect the detection signal through the corresponding transmission coil. Can be controlled to be sent.
  • the timer 650 may transmit a specific event signal to the controller 640 at a predetermined period during the ping transmission step.
  • the controller 640 controls the multiplexer 621 to transmit the specific event signal.
  • the digital ping can be sent through the coil.
  • control unit 640 stores a predetermined transmission coil identifier and a corresponding transmission coil for identifying which transmission coil has received a signal strength indicator from the demodulator 632 during the first detection signal transmission procedure. Signal strength indicator received through the can be received. Subsequently, in the second detection signal transmission procedure, the control unit 640 controls the multiplexer 621 so that the detection signal may be transmitted only through the transmission coil (s) in which the signal strength indicator was received during the first detection signal transmission procedure. You may. As another example, the controller 640 transmits the second sensed signal to the transmit coil in which the signal strength indicator having the largest value is received when there are a plurality of transmit coils in which the signal intensity indicator is received during the first sensed signal transmit procedure. In the procedure, the sensing signal may be determined as the transmitting coil to be transmitted first, and the multiplexer 621 may be controlled according to the determination result.
  • the modulator 631 may modulate the control signal generated by the controller 640 and transmit the modulated control signal to the multiplexer 621.
  • the modulation scheme for modulating the control signal is a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a PSK (Phase Shift Keying) modulation scheme, a pulse width modulation scheme, a differential 2 Differential bi-phase modulation schemes may be included, but is not limited thereto.
  • the demodulator 632 may demodulate the detected signal and transmit the demodulated signal to the controller 640.
  • the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for controlling power during wireless power transmission, an end of charge (EOC) indicator, an overvoltage / overcurrent / overheat indicator, and the like.
  • EC error correction
  • EOC end of charge
  • the present invention is not limited thereto, and may include various state information for identifying a state of the wireless power receiver.
  • the demodulator 632 may identify from which transmission coil the demodulated signal is received, and may provide the control unit 640 with a predetermined transmission coil identifier corresponding to the identified transmission coil.
  • the wireless power transmitter 600 may obtain the signal strength indicator through in-band communication that communicates with the wireless power receiver using the same frequency used for wireless power transmission.
  • the wireless power transmitter 600 may not only transmit wireless power using the transmission coil 622 but also exchange various information with the wireless power receiver through the transmission coil 622.
  • the wireless power transmitter 600 further includes a separate coil corresponding to each of the transmission coils 622 (that is, the first to nth transmission coils), and wireless power using the separate coils provided. Note that in-band communication with the receiver may also be performed.
  • the wireless power transmitter 600 and the wireless power receiver perform in-band communication by way of example.
  • this is only one embodiment, and is a frequency band used for wireless power signal transmission.
  • Short-range bidirectional communication may be performed through a frequency band different from that of FIG.
  • the short-range bidirectional communication may be any one of low power Bluetooth communication, RFID communication, UWB communication, and Zigbee communication.
  • FIG. 7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG. 6.
  • the wireless power receiver 700 includes a receiving coil 710, a rectifier 720, a DC / DC converter 730, a load 740, a sensing unit 750, and a communication unit ( 760), and may include a main controller 770.
  • the communication unit 760 may include at least one of a demodulator 761 and a modulator 762.
  • the wireless power receiver 700 illustrated in the example of FIG. 7 is illustrated as being capable of exchanging information with the wireless power transmitter 600 through in-band communication, this is only one embodiment.
  • the communication unit 760 according to the embodiment may provide short-range bidirectional communication through a frequency band different from the frequency band used for wireless power signal transmission.
  • the AC power received through the receiving coil 710 may be delivered to the rectifier 720.
  • the rectifier 720 may convert AC power into DC power and transmit the DC power to the DC / DC converter 730.
  • the DC / DC converter 730 may convert the strength of the rectifier output DC power into a specific intensity required by the load 740 and then transfer it to the load 740.
  • the receiving coil 710 may include a plurality of receiving coils (not shown), that is, the first to nth receiving coils.
  • Frequency of AC power delivered to each receiving coil may be different from each other, another embodiment is a predetermined frequency controller with a function to adjust the LC resonance characteristics differently for each receiving coil It is also possible to set a different resonant frequency for each receiving coil by using a.
  • the sensing unit 750 may measure the intensity of the rectifier 720 output DC power and provide the same to the main controller 770. In addition, the sensing unit 750 may measure the strength of the current applied to the receiving coil 710 according to the wireless power reception, and may transmit the measurement result to the main controller 770. In addition, the sensing unit 750 may measure the internal temperature of the wireless power receiver 700 and provide the measured temperature value to the main controller 770.
  • the main controller 770 may determine whether the overvoltage occurs by comparing the measured intensity of the rectifier output DC power with a predetermined reference value. As a result of the determination, when the overvoltage is generated, a predetermined packet indicating that the overvoltage has occurred may be generated and transmitted to the modulator 762.
  • the signal modulated by the modulator 762 may be transmitted to the wireless power transmitter through the receiving coil 710 or a separate coil (not shown).
  • the main controller 770 may determine that a sensing signal has been received. When the sensing signal is received, a signal strength indicator corresponding to the sensing signal may be modulated. Can be transmitted to the wireless power transmitter.
  • the demodulator 761 demodulates an AC power signal or a rectifier 720 output DC power signal between the receiving coil 710 and the rectifier 720 to identify whether a detection signal is received, and then, the main subject of the identification result. It may be provided to the unit 770. In this case, the main controller 770 may control the signal strength indicator corresponding to the sensing signal to be transmitted through the modulator 762.
  • the main controller 770 may receive information for enabling connection with an external device from the connected wireless power transmitter based on the information demodulated by the demodulator 760.
  • the main control unit 770 may output the input external device information to the control unit for controlling the electronic device so that the input external device information may be output from the electronic device.
  • the main controller 770 may output the received power packet according to the charging state and the charging operation to the wireless power transmitter to acquire external device information from the wireless power transmitter based on the received power packet.
  • FIG. 8 is a diagram for describing a method of modulating and demodulating a wireless power signal, according to an exemplary embodiment.
  • the wireless power transmitter 10 and the wireless power receiver 20 may encode or decode a transmission target packet based on an internal clock signal having the same period.
  • the wireless power signal when the wireless power transmitter 10 or the wireless power receiver 20 does not transmit a specific packet, the wireless power signal is modulated with a specific frequency, as shown by reference numeral 41 of FIG. 1. AC signal may not be.
  • the wireless power transmitter 10 or the wireless power receiver 20 transmits a specific packet the wireless power signal may be an AC signal modulated by a specific modulation scheme as shown in FIG.
  • the modulation scheme may include, but is not limited to, an amplitude modulation scheme, a frequency modulation scheme, a frequency and amplitude modulation scheme, a phase modulation scheme, and the like.
  • Differential bi-phase encoding may be applied to binary data of a packet generated by the wireless power transmitter 10 or the wireless power receiver 20 as shown in FIG.
  • differential two-stage encoding allows two state transitions to encode data bit 1 and one state transition to encode data bit zero. That is, data bit 1 is encoded such that a transition between a HI state and a LO state occurs at a rising edge and a falling edge of the clock signal, and data bit 0 is HI at the rising edge of the clock signal.
  • the transition between state and LO state may be encoded to occur.
  • the encoded binary data may be applied with a byte encoding scheme, as shown at 830.
  • the byte encoding scheme includes a start bit and a stop bit for identifying a start and type of a corresponding bit stream for an 8-bit encoded binary bit stream.
  • the method may be a method of inserting a parity bit for detecting whether an error of a corresponding bit stream (byte) occurs.
  • FIG. 9 is a diagram for describing a packet format, according to an exemplary embodiment.
  • the packet format 900 used for exchanging information between the wireless power transmitter 10 and the wireless power receiver 20 may be used to obtain synchronization for demodulation of the packet and to identify the correct start bit of the packet.
  • Preamble (910) field a Header (Header, 920) field for identifying the type of message included in the packet, a message for transmitting the contents (or payload) of the packet (Message, 930) field and a checksum (940) field for identifying whether an error has occurred in the corresponding packet.
  • the packet receiver may identify the size of the message 930 included in the packet based on the header 920 value.
  • header 920 may be defined at each step of the wireless power transmission procedure, and some header 920 values may be defined as different types of messages although they are the same at different steps.
  • header values corresponding to the end power transfer of the ping phase and the end of the power transfer of the power transfer phase may be equal to 0x22.
  • the message 930 includes data to be transmitted at the transmitting end of the packet.
  • the data included in the message 930 field may be a report, a request, or a response to the counterpart, but is not limited thereto.
  • the message 930 may include information data on the external device from the wireless power transmitter 10.
  • the information data may be included as a report matter or a request matter.
  • the wireless power receiver 20 may request external device information from the wireless power transmitter 10. That is, the packet transmitter may request information of an external device or transmit information about the external device previously stored (wireless power receiver).
  • the packet 900 may further include at least one of a transmitter identification information for identifying a transmitter that transmitted the packet and a receiver identification information for identifying a receiver for receiving the packet.
  • the transmitter identification information and the receiver identification information may include IP address information, MAC address information, product identification information, and the like, but are not limited thereto and may be information that can distinguish the receiver and the transmitter from the wireless charging system.
  • the packet 900 may further include predetermined group identification information for identifying the corresponding reception group when the packet is to be received by a plurality of devices.
  • the packet transmitter when there are a plurality of packet transmitters (wireless power receivers) requesting information of the external device, the packet transmitter may include information for distinguishing each packet transmitter.
  • the packet transmitter when there are a plurality of packet transmitters (wireless power transmitters) for transmitting information of an external device, the packet transmitter may include information for distinguishing each packet transmitter.
  • FIG. 10 is a diagram illustrating a type of a packet that can be transmitted in a ping step by a wireless power receiver according to an embodiment.
  • the wireless power receiver may transmit a signal strength packet or a power transmission stop packet.
  • a message format of a signal strength packet may be configured as a signal strength value having a size of 1 byte.
  • the signal strength value may indicate a degree of coupling between the transmitting coil and the receiving coil, and is calculated based on the rectifier output voltage in the digital ping period, the open circuit voltage measured by the output disconnect switch, the intensity of the received power, and the like. It may be a value.
  • the signal strength value may range from a minimum of 0 to a maximum of 255, and may have a value of 255 when the actual measured value U for a particular variable is equal to the maximum value Umax of the variable.
  • the signal strength value may be calculated as U / Umax * 256.
  • a message format of a power transmission stop packet may be configured as an end power transfer code having a size of 1 byte.
  • the reason why the wireless power receiver requests the wireless power transmitter to stop power transmission is because of charge complete, internal fault, over temperature, over voltage, over current, and battery. It may include, but is not limited to, Battery Failure, Reconfigure and No Response, and Noise Current. It should be noted that the power transfer abort code may be further defined in response to each new power transfer abort reason.
  • the charging completion may be used that the charging of the receiver battery is completed.
  • Internal errors can be used when a software or logical error in receiver internal operation is detected.
  • the overheat / overvoltage / overcurrent can be used when the temperature / voltage / current values measured at the receiver exceed the thresholds defined for each.
  • Battery damage can be used if it is determined that a problem has occurred with the receiver battery.
  • Reconfiguration can be used when renegotiation for power transfer conditions is required.
  • No response may be used if it is determined that the transmitter's response to the control error packet, i.e., to increase or decrease the power strength, is not normal.
  • the noise current is a noise generated when switching in the inverter and may be used when the noise current value measured at the receiver exceeds a defined threshold value.
  • FIG. 11 is a diagram for describing a message format of an identification packet, according to an exemplary embodiment.
  • a message format of an identification packet includes a version information field, a manufacturer information field, an extension indicator field, and a basic device identification information field. Can be configured.
  • revision version information of a standard applied to a corresponding wireless power receiver may be recorded.
  • a predetermined identification code for identifying the manufacturer who manufactured the corresponding wireless power receiver may be recorded.
  • the extension indicator field may be an indicator for identifying whether an extension identification packet including extension device identification information exists. For example, if the extension indicator value is 0, it may mean that there is no extension identification packet. If the extension indicator value is 1, it may mean that the extension identification packet is present after the identification packet.
  • the device identifier for the corresponding wireless power receiver may be a combination of manufacturer information and basic device identification information.
  • the extended indicator value is 1
  • the device identifier for the corresponding wireless power receiver may be a combination of manufacturer information, basic device identification information and extended device identification information.
  • FIG. 12 illustrates a message format of a configuration packet and a power control suspend packet according to an embodiment.
  • a message format of a configuration packet may have a length of 5 bytes, and includes a power class field, a maximum power field, and a power control field. , A count field, a window size field, a window offset field, and the like.
  • the power class assigned to the wireless power receiver may be recorded in the power class field.
  • the strength value of the maximum power that can be provided by the rectifier output of the wireless power receiver may be recorded.
  • the maximum power Pmax desired to be provided at the rectifier output of the wireless power receiver may be calculated as (b / 2) * 10a.
  • the power control field may be used to indicate according to which algorithm the power control in the wireless power transmitter should be made. For example, if the power control field value is 0, this means that the power control algorithm is defined in the standard, and if the power control field value is 1, it may mean that power control is performed according to an algorithm defined by the manufacturer.
  • the count field may be used to record the number of option configuration packets to be transmitted by the wireless power receiver in the identification and configuration steps.
  • the window size field may be used to record the window size for calculating the average received power.
  • the window size may be a positive integer value greater than 0 and having a unit of 4 ms.
  • the window offset field may record information for identifying the time from the end of the average received power calculation window to the start of the transmission of the next received power packet.
  • the window offset may be a positive integer value greater than 0 and having a unit of 4 ms.
  • the message format of a power control hold packet may be configured to include a power control hold time T_delay.
  • a plurality of power control pending packets may be sent during the identification and configuration phase. For example, up to seven power control pending packets may be transmitted.
  • the power control hold time T_delay may have a value between a predefined power control hold minimum time T_min: 5 ms and a power control hold maximum time T_max: 205 ms.
  • the apparatus for transmitting power wirelessly may perform power control by using the power control holding time of the last power control holding packet received in the identification and configuration step.
  • the wireless power transmitter may use the T_min value as the T_delay value when the power control pending packet is not received in the identification and configuration steps.
  • the power control holding time may refer to a time during which the wireless power transmitter waits without performing power control after receiving the most recent control error packet and before performing the actual power control.
  • FIG. 13 is a diagram illustrating a structure of a charging mode packet for requesting a charging mode change, according to an exemplary embodiment.
  • one of undefined values of packet header values defined in the current wireless charging standard may be used as a header value of a charging mode packet.
  • the header value of the charging mode packet may be defined as 0x18. However, it should be noted that this is for convenience of description and need not necessarily be the value.
  • the message size corresponding to the header value 0x18 may be 1 byte.
  • Information on a charging mode to be changed may be recorded in a message field of the charging mode packet.
  • the wireless power receiver may record 0xff in the message field of the charging mode packet and transmit the same.
  • the wireless power receiver may write 0x00 in the message field of the charging mode packet and transmit the same.
  • the example shown in reference numeral 1350 is only for the understanding of the present invention and the message value is not necessarily defined as such.
  • FIG. 14 is a view for explaining a wireless charging method in a wireless power transmitter according to an embodiment.
  • the wireless power transmitter may collect state information of the wireless power receiver, that is, receiver state information (S1401).
  • the wireless power transmitter may check whether previously stored external output device information is transmitted based on the collected receiver state information (S1402).
  • the receiver state information may include state information on the charging progress.
  • the power transmission step may include state information or operation information on whether the power transmitted from the wireless power transmitter is stably received.
  • the receiver state information may include information about CPU usage.
  • the receiver state information may include application software and peripheral state information.
  • the wireless power transmitter determines whether transmission of previously stored external output device information is possible based on the confirmed state information of the receiver (S1403).
  • the wireless power transmitter may transmit the information about the external output device previously stored to the wireless power receiver (S1404).
  • the external output device information may include connection information such as a MAC address and an IP address.
  • the external output device may include an audio output device or an image output device capable of short-range wireless communication.
  • the device may include an audio, earphone, or video display device capable of Bluetooth communication.
  • the present invention is not limited thereto, and electronic devices including a wireless power receiver may receive information about various external devices that can be connected through short-range wireless communication.
  • 15 is a diagram for describing a wireless charging method in a wireless charging system according to one embodiment.
  • the wireless power transmitter 1510 transitions from an identification and configuration step to a power transmission step. Thereafter, a packet for confirming whether or not the information about the external output device stored in advance can be transmitted to the wireless power receiver 1520 may be generated and transmitted.
  • S1501 Specifically, the wireless power transmitter 1510 of the wireless power receiver may be used.
  • the power reception state is checked in the power transmission step, and based on the check result, the electronic device 1530 may check whether information about an external output device to which the electronic device 1530 may be connected may be transmitted.
  • the wireless power receiver 1520 may transmit the information of the power reception state based on the packet received from the wireless power transmitter 1510. (S1502)
  • the information of the reception state is a power reception state, charging power information, and error occurrence information. And the like.
  • the wireless power transmitter 1510 may transmit information about a pre-stored external output device to the wireless power receiver 1520 based on the received power packet received from the wireless power receiver 1520.
  • the wireless power transmitter 1510 determines that the wireless power receiver 1520 receives the wireless power in a normal state based on the received received power packet.
  • information about an external output device connectable to the electronic device 1530 including the wireless power receiver 1520 may be transmitted.
  • the information on the external output device may include a MAC address or an IP address.
  • the wireless power receiver 1520 transmits information on the external output device received from the wireless power transmitter 1510 to the electronic device 1530.
  • the electronic device 1530 is the wireless power receiver ( Information about the external output device received from 1530 may be output to facilitate user recognition.
  • the present embodiment has been described with an example of transmitting external output device information from one wireless power transmitter to one wireless power receiver.
  • the present invention is not limited thereto, and when there are a plurality of wireless power receivers connected to the wireless power transmitter 1510, external output device information may be transmitted to the plurality of wireless power receivers according to a predetermined priority or a specific order.
  • external output device information stored in each wireless power transmitter may be transmitted to the corresponding wireless power receiver according to a predetermined priority or a specified order.
  • 16 is a view for explaining a wireless charging method in a wireless power receiver according to another embodiment.
  • the wireless power receiver when the wireless power receiver enters a power transmission step, the wireless power receiver transmits status information (ie, receiver status information) to the wireless power transmitter.
  • the wireless power receiver may request external output device information that can be connected to an external device during the power transmission step (S1601).
  • the receiver state information may include state information on the charging progress.
  • the power transmission step may include state information or operation information on whether the power transmitted from the wireless power transmitter is stably received.
  • the receiver state information may include information regarding CPU usage.
  • the receiver status information may include drinking software and peripheral status information.
  • the wireless power receiver may request external output device information from the wireless power transmitter and receive external output device information that can be connected from the wireless power transmitter during the power transmission step.
  • the external power device received from the wireless power transmitter may include connection information such as MAC address and IP address.
  • the external output device may include an audio output device or an image output device capable of short-range wireless communication. Preferably, it may include an audio, earphone, or video display device capable of Bluetooth communication.
  • the present invention is not limited thereto, and electronic devices including a wireless power receiver may receive information about various external devices that can be connected through short-range wireless communication.
  • the wireless power receiver transmits the external output device information received from the wireless power transmitter to an electronic device that receives the power of the wireless power receiver (S1603).
  • 17 is a view illustrating a wireless charging method in a wireless charging system according to another embodiment.
  • the wireless power transmitter 1710 and the wireless power receiver 1720 transition from the identification and configuration stages to the power transmission stages. Thereafter, when the power transmission step proceeds, the wireless power receiver 1720 outputs a received power packet indicating the state of power reception and the state of the wireless power receiver 1720 to the wireless power transmitter 1710 (S1701).
  • the wireless power receiver 1720 may request external output device information that can be connected to the wireless power transmitter 1710 (S1702).
  • the wireless power transmitter 1710 may transmit information about a pre-stored external output device to the wireless power receiver 1720. [S1703] Specifically, the wireless power transmitter 1710 receives the wireless power receiver 1720. Based on the power packet and the external output device request signal, the wireless power receiver 1720 determines that wireless power is received in a normal state. Thereafter, information about an external output device connectable to the electronic device 1730 including the wireless power receiver 1720 may be transmitted. In this case, the information on the external output device may include a MAC address or an IP address.
  • the wireless power receiver 1720 outputs information on the external output device received from the wireless power transmitter 1710 to the electronic device 1730.
  • the electronic device 1730 is the wireless power receiver 1530. Information on the external output device received from the) can be output to facilitate user recognition.
  • FIG. 18 is a diagram illustrating an operation of an electronic device including a wireless power receiver according to another embodiment.
  • an electronic device including a wireless power receiver according to the present embodiment will be described as an example of a mobile phone.
  • the present invention is not limited thereto and may include a mobile device device equipped with the above-described wireless power receiver and capable of charging the battery.
  • the electronic device receives external device information that can be connected from the wireless power receiver (S1801).
  • the received external device information may include at least one or more information.
  • the electronic device may check the external output device information received through the wireless power receiver (S1802).
  • the electronic device may output the external output device information received through the display unit, for example, the display unit.
  • the external output device information may be displayed in a list according to a preset order (S1803).
  • the electronic device may determine whether a specific external device connection request signal is received from the displayed external output device information (S1804). Specifically, the connection request signal may be input through a user or may be specified according to a preset priority. Any one external device can be connected.
  • the electronic device activates the communication unit when the connection approval request signal for connecting any one external device is identified (S1805). Specifically, the activated communication unit activates a short range wireless communication module for communicating with the external output device. It may include.
  • the electronic device connects communication with the selected external output device through the activated communication unit (S1806).
  • the electronic device may output data through the communication unit to the connected external output device (S1807).
  • the connected external output device is an audio output device
  • the electronic device outputs audio outputted from the electronic device from the audio output device. Audio data can be output.
  • the connected external output device is an image output device
  • the image data may be output so that the image output from the electronic device is output from the image output device.
  • 19 is an exemplary view for explaining a connection state of a wireless charging system according to an embodiment.
  • the wireless power transmitter 1910 may seat an electronic device 1920 including a wireless power receiver on one surface.
  • information about an external output device stored in the wireless power transmitter 1910 may be displayed on the electronic device screen 1925. I can display it.
  • the electronic device 1920 may display external output device information collected from the wireless power transmitter 1910.
  • the electronic device 1920 communicates with any one specified external output device selected according to a user selection or a preset priority among the displayed external output device information. That is, the electronic device 1920 may output various data through the selected external output device 1950.
  • the selected external output device is described as an audio output device. For example, audio data output from an electronic device may be output through the audio output device.
  • 20 is a diagram illustrating a wireless charging transmission coil according to an embodiment.
  • three transmitting coils may be arranged.
  • at least one of the plurality of the receiving coils may be overlapped.
  • the first coil 2010 and the second coil 2020 are arranged in the first layer side by side at a predetermined interval on the shielding material 2040, and the third coil 2030 is the first coil 2010 and the first coil 2030.
  • the second coil 202 may be disposed to overlap the second layer.
  • the first coil 2010, the second coil 2020, and the third coil 203 may be manufactured according to the specifications of the coils defined in the WPC or the PMA, and the same within a range in which the respective physical characteristics may be tolerated. can do.
  • the transmitting coil may have a specification as shown in Table 1 below.
  • Table 1 is a specification for an A13 type transmission coil defined in the WPC.
  • the first coil 2010, the second coil 2020, and the third coil 2030 may have an outer length and an inner side defined in Table 1. It can be produced in length, outer width, inner width, thickness and number of turns. Of course, by the same manufacturing process, the first coil 2010, the second coil 2020, and the third coil 2030 may have the same physical characteristics within an error range.
  • each of the first coil 2010, the second coil 2020, and the third coil 2030 may have a different inductance value depending on the position of the first coil 2010, the second coil 2020, and the third coil 2030.
  • the first coil 2010 and the second coil 2020 satisfy the specification of Table 1 and have an inductance of 12.5 uH.
  • the third coil 3630 has a first coil having a separation distance from the shielding material. Unlike the 3610 and the second coil 3620, it may have an inductance smaller than 12.5 uH.
  • the third coil 2030 may be spaced apart from the shielding material by a predetermined height.
  • an adhesive may be disposed between the first coil 2010, the second coil 2020, or the third coil 3030 and the shielding material.
  • the third coil 2030 has a number of turns more than the number of turns of the first coil 2010 and the second coil 2020 in order to have the same inductance as the first coil 2010 and the second coil 2020. For example, 0.5 or 1 or 2 times more turns can be made.
  • the third coil may have 12.5 turns or 13 or 14 turns.
  • the centrally located third coil 2030 is located farther from the shielding material than the first coil 2010 and the second coil 2020 so that the measured inductance is measured in the first coil 2010 and the second coil 2020.
  • the length of the conductive wire constituting the third coil 2030 may be slightly longer than that of the first coil 2010 and the second coil 2020, so that the inductance may be adjusted in the same manner.
  • the length of the conductive wire constituting the third coil 2030 is slightly longer than that of the first coil 2010 and the second coil 2020, so that the third coil 2030 may be the first coil 2030. And although located farther from the shield than the second coil 2020, the inductance of the three coils may be equal to 12.5 uH. In one embodiment, the same inductance of the coil means that it has an error range within ⁇ 0.5 uH.
  • the overlapping transmission coils may have a smaller inductance measured as the distance from the shield is farther away, and the length of the transmission coil may be longer to increase the inductance as the distance from the shield is farther away.
  • FIG. 21 is a diagram illustrating three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils according to an embodiment.
  • the resonant frequency generated by the wireless power transmitter to perform power transmission cannot be different for each of the transmitting coils, and should be in accordance with the standard resonant frequency supported by the wireless power transmitter.
  • the resonance frequency generated by the LC resonant circuit 2120 may vary according to the inductance of the coil and the capacitance of the capacitor.
  • the resonant frequency (fr, resonant frequency) may be 100Khz, and the capacitance of the capacitor connected to the coil to generate the resonance frequency is 200nF, all three coils 12.5uH to use only one capacitor Must be satisfied. If the inductances of the three coils are different from each other, three capacitors having different capacitances are required to generate a resonance frequency of 100 kHz. In addition, three drive circuits 2110 including an inverter for applying an AC voltage in each LC resonant circuit 2120 are also required.
  • 22 is a diagram for describing a wireless power transmitter including a plurality of coils and a single drive circuit according to an embodiment.
  • the wireless power receiver may include only one drive circuit 2210, and the wireless power receiver among one drive circuit 2210 and three coils.
  • the switch 230 may be controlled to connect the coil of the wireless power transmitter with the coil having the highest power transmission efficiency.
  • the wireless power transmitter can reduce the area occupied by using only one drive circuit 2210, thereby miniaturizing the wireless power transmitter itself, and can reduce the raw material cost required for manufacturing.
  • the wireless power transmitter may use the signal strength indicator in the ping step to calculate the power transmission efficiency between the three coils of the wireless power transmitter and the coil of the wireless power receiver.
  • the wireless power transmitter may select a coil of the wireless power transmitter having a high coupling coefficient by calculating a coupling coefficient between the transmission and reception coils.
  • the wireless power transmitter may control the switch 2230 so that the wireless power transmitter may calculate a Q factor to identify a coil of the wireless jersey transmitter having a high cuppeter and to be connected to the drive circuit 2210.
  • FIG. 23 illustrates a plurality of switches connecting one of a plurality of transmission coils to a drive circuit according to an exemplary embodiment.
  • the power transmitter includes a drive circuit 2310 for converting an input voltage, a switch 2320 for connecting the drive circuit 2310 and an LC resonant circuit, a plurality of transmission coils 2330, and a plurality of wireless power transmitters.
  • One capacitor 2340 connected in series with the coil of the control unit 2350 for controlling the opening and closing of the switch 2320 may be included.
  • the controller 2350 identifies a coil of the wireless power receiver and a coil of the wireless power transmitter having the highest power transmission efficiency among the plurality of coils 2330 of the wireless power transmitter, and drives the coil of the identified wireless power transmitter in the drive circuit 2310. Control to close the switch to connect the
  • the method according to the embodiment described above may be stored in a computer-readable recording medium that is produced as a program for execution on a computer, and examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape , Floppy disks, optical data storage, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet).
  • the computer readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.
  • functional programs, codes, and code segments for implementing the above-described method may be easily inferred by programmers in the art to which the embodiments belong.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Le présent mode de réalisation concerne un dispositif d'émission de puissance sans fil et un dispositif de réception de puissance sans fil. Le dispositif d'émission de puissance sans fil d'après un mode de réalisation comprend : une unité d'émission de puissance comprenant une bobine d'émission ; une unité de conversion de puissance qui convertit l'intensité de la puissance ; une unité de stockage qui stocke des informations sur un dispositif externe auquel le dispositif de réception de puissance sans fil peut se connecter ; une unité de communication qui communique avec le dispositif de réception de puissance sans fil ; et une unité de commande qui commande le mode de chargement du dispositif de réception de puissance sans fil et commande de telle sorte que les informations sur le dispositif externe sont fournies au dispositif de réception de puissance sans fil.
PCT/KR2017/014974 2016-12-22 2017-12-19 Dispositif d'émission de puissance sans fil et dispositif de réception de puissance sans fil WO2018117578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160176878A KR20180073246A (ko) 2016-12-22 2016-12-22 무선전력 송신장치 및 무선전력 수신장치와 그 동작 방법
KR10-2016-0176878 2016-12-22

Publications (1)

Publication Number Publication Date
WO2018117578A1 true WO2018117578A1 (fr) 2018-06-28

Family

ID=62627525

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/014974 WO2018117578A1 (fr) 2016-12-22 2017-12-19 Dispositif d'émission de puissance sans fil et dispositif de réception de puissance sans fil

Country Status (2)

Country Link
KR (1) KR20180073246A (fr)
WO (1) WO2018117578A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102653440B1 (ko) * 2018-12-07 2024-04-02 삼성전자주식회사 무선 전력 송신 및 수신 장치 및 그 전력 조정 방법
WO2021006475A1 (fr) * 2019-07-08 2021-01-14 엘지전자 주식회사 Dispositif de transmission de puissance sans fil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140121902A (ko) * 2009-02-24 2014-10-16 퀄컴 인코포레이티드 무선 전력 충전 타이밍 및 충전 제어
KR20150099382A (ko) * 2014-02-21 2015-08-31 삼성전기주식회사 무선 전력 송신 장치 및 수신 장치, 모바일 단말, 어플리케이션 서버, 그를 이용한 위치 기반 서비스 시스템 및 어플리케이션
US20150256965A1 (en) * 2012-09-13 2015-09-10 Yamaha Corporation Proximity Communication System and Proximity Communication Apparatus
KR101660747B1 (ko) * 2010-11-09 2016-09-29 엘지전자 주식회사 이동 단말기 및 그 제어방법
KR20160145554A (ko) * 2014-04-11 2016-12-20 엘지전자 주식회사 무선 전력 송신기 및 무선 전력 송신 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140121902A (ko) * 2009-02-24 2014-10-16 퀄컴 인코포레이티드 무선 전력 충전 타이밍 및 충전 제어
KR101660747B1 (ko) * 2010-11-09 2016-09-29 엘지전자 주식회사 이동 단말기 및 그 제어방법
US20150256965A1 (en) * 2012-09-13 2015-09-10 Yamaha Corporation Proximity Communication System and Proximity Communication Apparatus
KR20150099382A (ko) * 2014-02-21 2015-08-31 삼성전기주식회사 무선 전력 송신 장치 및 수신 장치, 모바일 단말, 어플리케이션 서버, 그를 이용한 위치 기반 서비스 시스템 및 어플리케이션
KR20160145554A (ko) * 2014-04-11 2016-12-20 엘지전자 주식회사 무선 전력 송신기 및 무선 전력 송신 방법

Also Published As

Publication number Publication date
KR20180073246A (ko) 2018-07-02

Similar Documents

Publication Publication Date Title
WO2018021665A1 (fr) Procédé et appareil de vérification d'emplacement pour récepteur d'énergie sans fil
WO2017082531A1 (fr) Procédé de charge sans fil multi-bobines, et appareil et système correspondants
WO2018093099A1 (fr) Procédé de transfert d'énergie sans fil et appareil associé
WO2017003117A1 (fr) Procédé de transmission d'énergie sans fil multimode et dispositif correspondant
WO2018105915A1 (fr) Procédé de détection d'objet étranger et son appareil
WO2017030354A1 (fr) Émetteur de puissance sans fil et unité de commande de véhicule connectée à celui-ci
WO2017111369A1 (fr) Émetteur d'énergie sans fil prenant en charge plusieurs modes
WO2019139326A1 (fr) Appareil et procédé permettant d'exécuter un étalonnage de puissance dans un système de transmission de puissance sans fil
WO2019160351A1 (fr) Appareil et procédé destinés à prendre en charge une communication hétérogène dans un système de transmission d'énergie sans fil
WO2018056633A1 (fr) Procédé de transmission d'énergie sans fil et dispositif associé
WO2018080049A1 (fr) Bobine de charge sans fil d'émetteur et de récepteur d'énergie sans fil, et procédé de production associé
WO2019039898A1 (fr) Appareil et procédé permettant d'exécuter une communication dans un système de transmission de puissance sans fil
WO2017142234A1 (fr) Procédé de charge sans fil et appareil et système associés
WO2018106072A1 (fr) Procédé de détection de substance étrangère pour charge sans fil et appareil associé
WO2019203420A1 (fr) Appareil et procédé permettant de détecter un corps étranger dans un système de transmission d'énergie sans fil
WO2017209381A1 (fr) Procédé de transmission de puissance sans fil et dispositif associé
WO2017195977A2 (fr) Procédé de chargement sans fil, et appareil et système associés
WO2017034134A1 (fr) Batterie à charge sans fil et procédé de commande de charge sans fil
WO2018194337A1 (fr) Appareil de transmission d'énergie sans fil pour charge sans fil
WO2020222528A1 (fr) Récepteur d'énergie sans fil, émetteur d'énergie sans fil et procédé de transfert d'énergie sans fil les mettant en œuvre
WO2021066611A1 (fr) Appareil de réception d'énergie sans fil, appareil de transmission d'énergie sans fil et procédé d'étalonnage d'énergie utilisant ceux-ci
WO2018008841A1 (fr) Procédé et appareil de commande de puissance sans fil pour une charge sans fil
WO2018048111A1 (fr) Procédé et appareil de commande de récepteur d'énergie sans fil à antenne de communication en champ proche
WO2017138712A1 (fr) Procédé de charge sans fil et dispositif et système associés
WO2017179826A1 (fr) Procédé de détection de corps étranger (fo), et dispositif et système associés

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17884623

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17884623

Country of ref document: EP

Kind code of ref document: A1