WO2018074803A1 - Dispositif de transmission d'énergie sans fil - Google Patents

Dispositif de transmission d'énergie sans fil Download PDF

Info

Publication number
WO2018074803A1
WO2018074803A1 PCT/KR2017/011427 KR2017011427W WO2018074803A1 WO 2018074803 A1 WO2018074803 A1 WO 2018074803A1 KR 2017011427 W KR2017011427 W KR 2017011427W WO 2018074803 A1 WO2018074803 A1 WO 2018074803A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
wireless power
transmitter
power
terminal
Prior art date
Application number
PCT/KR2017/011427
Other languages
English (en)
Korean (ko)
Inventor
임성현
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 WO2018074803A1 publication Critical patent/WO2018074803A1/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
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • 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
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/027—Coils wound on non-magnetic supports, e.g. formers wound on formers for receiving several coils with perpendicular winding axes, e.g. for antennae or inductive power transfer

Definitions

  • the present embodiment relates to wireless power transmission, and more particularly, to a wireless power transmission apparatus.
  • Wireless power transmission or wireless energy transfer is a technology that transmits electrical energy wirelessly from a transmitter to a receiver using the principle of induction of magnetic field, which is already used by electric motors or transformers using the electromagnetic induction principle in the 1800s. Since then, there have been attempts to transmit electrical energy by radiating electromagnetic waves such as high frequency, microwaves, and lasers. Electric toothbrushes and some wireless razors that we commonly use are actually charged with the principle of electromagnetic induction.
  • energy transmission using wireless may be classified into magnetic induction, electromagnetic resonance, and RF transmission using short wavelength radio frequency.
  • the magnetic induction method uses the phenomenon that magnetic flux generated at this time causes electromotive force to other coils when two coils are adjacent to each other and current flows to one coil, and is rapidly commercialized in small devices such as mobile phones. Is going on. Magnetic induction is capable of transmitting power of up to several hundred kilowatts (kW) and has high efficiency, but the maximum transmission distance is less than 1 centimeter (cm).
  • the magnetic resonance method is characterized by using an electric or magnetic field instead of using electromagnetic waves or current. Since the magnetic resonance method is hardly affected by the electromagnetic wave problem, it has the advantage of being safe for other electronic devices or the human body. On the other hand, it can be utilized only in limited distances and spaces, and has a disadvantage in that energy transmission efficiency is rather low.
  • the present embodiment is to solve the problems of the prior art described above, an object of the present embodiment is to provide a wireless power transmission device for wireless charging.
  • Another object of the present embodiment is to provide a wireless power transmission apparatus for reducing the internal resistance of the wireless power transmission apparatus and thereby maximizing wireless charging efficiency.
  • Another object of the present embodiment is to provide a wireless power transmission apparatus that reduces the manufacturing cost of the wireless power transmission apparatus and increases the operation efficiency of the apparatus.
  • Wireless power transmission apparatus includes a substrate; A first coil formed on the substrate; And a second coil formed to correspond to the first coil, wherein the first coil and the second coil are connected in parallel with different types of coils having different resistance values.
  • the present embodiment may have the effect of reducing the resistance value by configuring the coil as a heterogeneous coil in the wireless power transmission apparatus.
  • This embodiment may have an effect of reducing the manufacturing cost of the wireless power transmission apparatus by the coil configuration.
  • This embodiment may have the effect of increasing the charging efficiency by using a plurality of coils without a separate configuration.
  • 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 one embodiment.
  • FIG. 4 is a state transition diagram for explaining a power transmission procedure by a magnetic induction method.
  • FIG. 5 is a state transition diagram for explaining a wireless power transmission procedure by a magnetic resonance method.
  • 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 an equivalent circuit diagram of a coil unit of the wireless power transmitter according to the present embodiment.
  • FIG. 9 is a top view of the transmitting coil unit according to the present embodiment.
  • FIG. 10 is an exploded perspective view of the transmitting coil unit according to the present embodiment.
  • FIG 11 is a top view and a side view of a transmitting coil unit according to the present embodiment.
  • FIG. 13 is a perspective view of a transmission coil unit according to another exemplary embodiment.
  • FIG. 14 is an exploded perspective view of a transmitting coil unit according to another exemplary embodiment.
  • FIG. 15 is an exploded perspective view of a transmitting coil unit according to another exemplary embodiment.
  • the top (bottom) or the bottom (bottom) when described as being formed on the “top” or “bottom” of each component, the top (bottom) or the bottom (bottom) is the two components are in direct contact with each other or One or more other components are all included disposed between the two components.
  • up (up) or down (down) when expressed as “up (up) or down (down)” may include the meaning of the down direction as well as the up direction based on one component.
  • a device equipped with a function for transmitting wireless power on the wireless charging system is a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter for convenience of description.
  • a transmitter side, a wireless power transmitter, a wireless power transmitter, and the like will be used interchangeably.
  • 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, Receivers, receivers and the like can be used interchangeably.
  • the transmitter according to the present invention may be configured in a pad form, a cradle form, an access point (AP) form, a small base station form, a stand form, a ceiling buried form, a wall hanging form, and the like. You can also transfer power.
  • the transmitter may comprise at least one wireless power transmission means.
  • the wireless power transmission means may use various wireless power transmission standards based on an electromagnetic induction method that generates a magnetic field in the power transmitter coil and charges using the electromagnetic induction principle in which electricity is induced in the receiver coil under the influence of the magnetic field.
  • the wireless power transmission means may include a wireless charging technology of the electromagnetic induction method defined by the Wireless Power Consortium (WPC) and the Power Matters Alliance (PMA) which is a wireless charging technology standard apparatus.
  • WPC Wireless Power Consortium
  • PMA Power Matters Alliance
  • the receiver according to the embodiment of the present invention may be provided with at least one wireless power receiving means, and may simultaneously receive wireless power from two or more transmitters.
  • the wireless power receiving means may include an electromagnetic induction wireless charging technology defined by the Wireless Power Consortium (WPC) and the Power Matters Alliance (PMA), which are wireless charging technology standard organizations.
  • WPC Wireless Power Consortium
  • PMA Power Matters Alliance
  • the receiver according to the present invention is a mobile phone, smart phone, laptop computer, digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, MP3 player, electric It may be used in a small electronic device such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing bobber, a wearable device such as a smart watch, but is not limited thereto. If the device is equipped with a wireless power receiver according to the present invention, the battery can be charged. It is enough.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment of the present invention.
  • 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 20 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. It can also be done.
  • 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 performed by the wireless power receiver 20 only transmitting information to the wireless power transmitter 10, but is not limited thereto.
  • the wireless power transmitter 10 may transmit information to the wireless power receiver 20. It may be to transmit.
  • bidirectional communication between the wireless power receiver 20 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 status information, battery output voltage / current information, and the like.
  • the information may be obtained from the electronic device 30 and may be utilized for wireless power control.
  • the wireless power transmitter 10 may transmit a predetermined packet indicating whether to support fast charging to the wireless power receiver 20.
  • the wireless power receiver 20 may notify 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 fast charging is possible through predetermined display means provided, for example, it may be a liquid crystal display.
  • the user of the electronic device 30 may control the wireless power transmitter 10 to operate in the fast charge mode by selecting a predetermined fast charge request button displayed on the liquid crystal display.
  • the electronic device 30 may transmit a predetermined quick charge request signal to the wireless power receiver 20.
  • the wireless power receiver 20 may convert the normal low power charging mode into the fast charging mode by generating a charging mode packet corresponding to the received fast charging request signal to the wireless power transmitter 10.
  • FIG. 2 is a block diagram illustrating a wireless charging system according to another embodiment of the present invention.
  • 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 the wireless Charging may also be performed.
  • the wireless power transmitter 10 may distribute and transmit power to the plurality of wireless power receivers in a time division manner, but is not limited thereto.
  • the wireless power transmitter 10 may distribute and transmit power to a plurality of wireless power receivers by using different frequency bands allocated for each wireless power receiver.
  • the number of wireless power receivers that can be connected to one wireless power transmitter 10 may include at least one of required power for each wireless power receiver, a state of charge of a battery, power consumption of an electronic device, and available power of the wireless power transmitter. Can be adaptively determined based on the
  • the wireless power transmitter 10 may be configured with a plurality of wireless power transmitters.
  • the wireless power receiver 20 may be connected to a plurality of wireless power transmitters at the same time, 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 20 is adaptively based on the required power of the wireless power receiver 20, the state of charge of the battery, the power consumption of the electronic device, the available power of the wireless power transmitter, and the like. Can be determined.
  • FIG 3 is a view for explaining a detection signal transmission procedure in a wireless charging system according to an embodiment of the present invention.
  • the wireless power transmitter may be equipped with three transmitting coils 111, 112, and 113. Each transmission coil may overlap some other area with another transmission coil, and the wireless power transmitter may detect a predetermined detection 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 can identify the received transmission coils 111, 112.
  • 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 best-aligned transmitting coil and performs wireless charging using the selected transmitting coil. .
  • FIG. 4 is a state transition diagram for explaining a power transmission procedure by a magnetic induction method.
  • power transmission from a transmitter to a receiver according to a magnetic induction method is largely selected as a selection phase 410, a ping phase 420, 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 the power transmission.
  • 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).
  • 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.
  • ping step 420 when an object is detected, the transmitter activates the receiver and sends a digital ping to identify whether the receiver is a receiver that is compliant with the WPC standard. If the transmitter does not receive a response signal (for example, a signal strength indicator) from the receiver in response to the digital ping in step 420, it may transition back to the selection step 410 (S402). In addition, in the ping step 420, when the transmitter receives a signal indicating that power transmission is completed, that is, a charging completion signal, from the receiver, the transmitter may transition to the selection step 410 (S403).
  • a response signal for example, a 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 transmitter receives an unexpected packet, a desired packet has not been received for a predefined time, a packet transmission error, or a power transmission contract. If this is not set (no power transfer contract) it may transition to the selection step (410) (S405).
  • the transmitter may transition to the power transmission step 240 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.
  • FIG. 5 is a state transition diagram for explaining a wireless power transmission procedure by a magnetic resonance method.
  • power transmission from a transmitter to a receiver according to a magnetic resonance method may include a standby phase (510), a digital ping phase (520), an identification phase (530), and a 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. It should be noted that 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 include a DC / DC converter 611 and an 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. In addition, the sensing unit 650 may measure the internal temperature of the wireless power transmitter 600 to determine whether overheating occurs, and provide the measurement result to the controller 640. For example, 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. Can be. To this end, one side of the power converter 610 may be further provided with a predetermined power cut-off circuit for cutting off the power supplied from the power supply unit 650, or cut 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 or (and) power control signal of the wireless power receiver through the communication unit 630, 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 612 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 621 to generate AC power.
  • this is only one embodiment, and the other example is before the amplifier 612. Note that it may be mixed in stages or later.
  • Frequency of AC power delivered to each transmission coil may be different from each other, and another embodiment each using a predetermined frequency controller with a function to adjust the LC resonance characteristics differently for each transmission coil It is also possible to set different resonant frequencies for each transmission coil.
  • the wireless power transmitter may include the plurality of transmission coils. Even if including the power can be transmitted using the same resonance frequency.
  • 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.
  • the wireless power transmitter 600 may adaptively provide a fast charging mode and a general low power charging mode according to a request of the wireless power receiver.
  • the wireless power transmitter 600 may transmit a signal of a predetermined pattern-a business card called a first packet-for convenience of description.
  • the wireless power receiver 600 may identify that the wireless power transmitter 600 being connected is capable of fast charging.
  • the wireless power receiver may transmit a predetermined first response packet to the wireless power transmitter 600 requesting fast charging.
  • the wireless power transmitter 600 may automatically switch to the fast charging mode and start fast charging.
  • the first packet is transmitted through the transmission coil 622.
  • the first packet may be sent in the identification and configuration step 430 of FIG. 4 or the identification step 530 of FIG. 5.
  • information for identifying whether fast charging is supported may be encoded and transmitted in the digital ping signal transmitted by the wireless power transmitter 600.
  • the wireless power receiver may transmit a predetermined charging mode packet to the wireless power transmitter 600 in which the charging mode is set to fast charging.
  • the wireless power transmitter 600 and the wireless power receiver may control an internal operation so that power corresponding to the fast charging mode may be transmitted and received.
  • the over voltage judgment criteria, the over temperature judgment criteria, the low voltage / high voltage judgment criteria, the optimum voltage Values such as level (Optimum Voltage Level), power control offset, etc. may be changed and set.
  • the threshold voltage for determining the overvoltage may be set to be high to enable fast charging.
  • the threshold temperature may be set to be high in consideration of the temperature rise due to the fast charging.
  • the power control offset value which means the minimum level at which power is controlled in the transmitter, may be set to a larger value than the general low power charging mode so that the power control offset value may quickly converge to a desired target power level in the fast charging mode.
  • 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 transferred 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 is generated 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 600 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.
  • 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.
  • FIG. 8 is an equivalent circuit diagram of a coil unit of the wireless power transmitter according to the present embodiment
  • FIG. 9 is a top view of the transmitting coil unit according to the present embodiment
  • FIG. 10 is an exploded perspective view of the transmitting coil unit according to the present embodiment
  • 11 is a top view and a side view of a transmitting coil unit according to the present embodiment.
  • the transmission coil unit includes a plurality of transmission coils 810 and 820 of different types.
  • the transmitting coil unit includes a first coil 810 formed of a pattern coil formed on a flexible printed circuit board (FPCB) and a second coil 820 formed to be wound in correspondence with the first coil.
  • the second coil may include a crimped coil that compresses and attaches the material wound in the form of a copper winding coil or a coil. That is, the first coil and the second coil each include a coil having a heterogeneous material or form.
  • the first coil 810 and the second coil 820 are connected in parallel to each other.
  • the first coil 810 and the second coil 820 have different resistance values.
  • the second coil 820 has a low resistance value compared to the first coil 810. Since the first coil 810 is formed on the flexible circuit board, and the second coil 820 has a form of a wound copper coil, the first coil 810 and the second coil 820 constitute a material of the coil. And the second coil 820 has a lower resistance value than the first coil 810 by the characteristics.
  • Inductances of the first coil 810 and the second coil 820 may be the same. Alternatively, inductances of the first coil 810 and the second coil 820 may be different. In this case, the inductance of the second coil 820 may be lower than the inductance of the first coil 810.
  • the first coil 810 is disposed in an outer region of the substrate 800, and the second coil 820 is formed of the substrate 800 on which the first coil 810 is not disposed. It may be disposed in the inner region. In this case, the first coil 810 and the second coil 820 may be formed on the same layer of the substrate 800.
  • first coil 810 and the second coil 820 are disposed on the same layer as the upper surface of the substrate 800 is described, but is not limited thereto.
  • the first coil 810 and the second coil 820 may be formed.
  • the first coil 810 is a pattern coil and may be configured in the form of a circle or a polygon having a predetermined angle.
  • the first coil 810 is formed on the substrate 800 by a laminating process and an etching process.
  • the first coil 810 may include a first terminal 811 formed at one end and a second terminal 812 formed at the other end of the first coil 810.
  • the second coil 820 may be disposed on the substrate 800.
  • the second coil 820 is composed of a winding coil.
  • the second coil 820 may be configured in a circular or polygonal shape having a predetermined angle.
  • the second coil 820 may include a first terminal 821 formed at one end and a second terminal 822 formed at the other end of the second coil 820. At this time, the first terminal 811 of the first coil 810 and the first terminal 821 of the second coil 820 are connected, and the second terminal 821 of the first coil 810 and the second coil ( The second terminal 822 of 820 is connected.
  • the first coil 810 and the second coil 820 may have a parallel connection structure in which the first terminals 811 and 821 and the second terminals 812 and 822 are connected. At this time, the first terminal 811 of the first coil 810 and the first terminal 821 of the second coil 820 and the second terminal 812 and the second coil 820 of the first coil 820.
  • the second terminal 822 may be directly connected. Or by connecting portions 833 and 834.
  • the connecting parts 830: 831, 832, 833, and 834 may be conductive patterns.
  • the conductive pattern may be formed on the substrate 800 by a laminating process and an etching process.
  • the contact part 840 is in electrical contact with the terminal device, and the first coil 810 and the second coil 820 are connected in parallel, and are connected to the connection part 830 connected in parallel.
  • the contact 840 includes a first contact 841 and a second contact 842.
  • the first contact part 841 is connected to a first connection part 831 connected to a first terminal 811 of the first coil 810 and a second terminal 821 of the second coil 820.
  • the second contact portion 842 is connected to a second connection portion 832 to which the second terminal 812 of the first coil 810 and the second terminal 822 of the second coil 820 are connected.
  • first connection part 831 which is drawn out from the first terminal 811 of the first coil 810, is connected to the first contact part 841, and is drawn out from the second terminal 812 of the first coil 810.
  • the second connection portion 832 is connected to the second contact portion 842.
  • a first coil 810 may be formed on the substrate 800, and a second coil 820 may be disposed inside the substrate 800.
  • the first coil 810 is disposed in an outer region of the substrate 800
  • the second coil 820 is disposed in an inner region of the substrate 800 such that the first coil 810 and the second coil (
  • the structure in which 820 is connected in parallel without overlapping has been described.
  • the present invention is not limited thereto and may have a structure in which the first coil 810 and the second coil 820 may be disposed to be stacked in the vertical direction. In addition to the various embodiments will be described later.
  • the first coil 810 and the second coil 820 may have an effect of reducing the resistance value compared to the case where the coils having the same resistance value are configured. have.
  • the amount of change in inductance and the amount of change in resistance according to the configuration of the coil to be applied to the present embodiment will be described.
  • an exemplary view is a graph showing a change in inductance value 1211 for each frequency according to a conventional coil configuration and a change in inductance value 1212 for each frequency according to a coil configuration applied in the present embodiment.
  • An exemplary diagram is a graph showing a change in resistance value 1221 for each frequency according to a conventional coil configuration and a resistance value 1222 for each frequency according to a coil configuration applied in the present embodiment.
  • the inductance value 1211 when the same coil having the same resistance value is conventionally disposed on both sides of the substrate and the coil having the different resistance value according to the present embodiment are the same surface or stacked on the substrate.
  • the difference and change in inductance value 1212 when connected in parallel are kept constant for each frequency, and the difference does not appear large.
  • the resistance value 1222 according to the coil configuration according to the present embodiment is compared with the resistance value 1221 according to the conventional coil configuration while maintaining the inductance value as shown in the graph (a). ) Decreases. That is, when one coil has a lower resistance value than the other coil compared with the conventional configuration of the coil having the same resistance value, the synthetic resistance value is reduced by the coil having the low resistance value.
  • the inductance may be kept constant compared to the conventional method of forming the same coil on both sides, and thus the resistance value may be reduced.
  • first coil 810 and the second coil 820 are directly contacted or connected by one connection part.
  • another connection structure of the first coil 810 and the second coil 820 will be described with reference to FIGS. 13 and 14.
  • FIG. 13 is a perspective view of a transmission coil unit according to another embodiment
  • FIG. 14 is an exploded perspective view of a transmission coil unit according to another embodiment.
  • the first coil 810 is disposed in the outer region of the substrate 800, and the second coil 820 is inside the substrate 800 in which the first coil 810 is not disposed. May be placed in the area.
  • the first coil 810 and the second coil 820 may be formed on the same layer of the substrate 800.
  • a structure in which the first coil 810 and the second coil 820 are disposed on the same layer as the upper surface of the substrate 800 has been described, but is not limited thereto.
  • the coil 810 and the second coil 9820 may be formed in a structure in which the coil 810 and the second coil 9820 are disposed.
  • the first coil 810 is a pattern coil and may be configured in a circular or polygonal shape having a predetermined angle.
  • the first coil 810 is formed on the substrate 800 by a laminating process and an etching process.
  • the first coil 810 may include a first terminal 811 formed at one end and a second terminal 812 formed at the other end of the second coil 810.
  • the second coil 820 may be disposed on the substrate 800.
  • the second coil 820 is composed of a winding coil.
  • the second coil 820 may be configured in a circular or polygonal shape having a predetermined angle.
  • the second coil 820 may include a first terminal 8721 formed at one end and a second terminal 822 formed at the other end of the second coil 820.
  • the first terminal 811, the second terminal 812 of the first coil 810, and the first terminal 821 and the second terminal 822 of the second coil 820 are connected to the connecting portions 830: 831, 832, 833, and 834, respectively.
  • the contact part 840 is a first contact part 841 connected to the first connection part 831 of the first coil 810, and a second contact part 842 connected to the second connection part 832 of the first coil 810.
  • the third contact part 843 is connected to the first connection part 833 of the second coil 820, and the fourth contact part 834 is connected to the second connection part 834 of the second coil 820.
  • the first contact part 841 and the third contact part 843 are connected to each other.
  • the connection lead 851 is connected.
  • the second contact part 842 and the fourth contact part 844 have a second contact point.
  • the connection lead 852 is connected. Therefore, the contact portion 840 is connected, so that the first coil 810 and the second coil 820 may be connected in parallel.
  • the first coil 810 and the second coil 820 are disposed on the same layer as the upper or lower surface of the substrate 800, and the second coil 820 is inside the substrate 800. It can be formed by being bonded to the adhesive member on,
  • first coil 810 and the second coil 820 are disposed on the same plane of the substrate so as not to overlap the outer region and the inner region.
  • first coil 810 and the second coil 820 are stacked in the vertical direction and connected in parallel will be described in detail with reference to FIG. 15.
  • FIG. 15 is an exploded perspective view of a transmitting coil unit according to another exemplary embodiment.
  • the first coil 810 is disposed on the substrate 800.
  • the first coil 810 is a pattern coil, and may be configured in the form of a circle or a polygon having a predetermined angle.
  • the first coil 810 is formed on the substrate 800 by a laminating process and an etching process.
  • the first coil 810 may include a first terminal 811 formed at one end and a second terminal 812 formed at the other end of the first coil 810.
  • the second coil 890 is formed to have a corresponding size of the first coil 810. Specifically, the second coil 890 is stacked in the vertical direction of the first coil 810 and connected in parallel. Preferably, the second coil 890 may be disposed on the upper surface of the second coil 890 in a size corresponding to that of the first coil 810 so as to be connected in parallel.
  • the second coil 890 may be configured in a circular or polygonal shape having a predetermined angle to correspond to the first coil 810.
  • the second coil 890 may include a first terminal 891 formed at one end and a second terminal 892 formed at the other end of the second coil 890. At this time, the first terminal 811 of the first coil 810 and the first terminal 891 of the second coil 890 are connected, and the second terminal 812 of the first coil 810 and the second coil ( The second terminal 821 of 890 is connected.
  • the first coil 810 and the second coil 890 may have a parallel connection structure in which the first terminals 811 and 891 and the second terminals 812 and 892 are connected. At this time, the first terminal 811 of the first coil 810 and the first terminal 891 of the second coil 890 and the second terminal 812 and the second coil 890 of the first coil 820.
  • the second terminal 892 of may be directly connected. Or by a connection.
  • the structure in which the first coil 810 and the second coil 890 are stacked in the vertical direction at a corresponding size and position is disposed on the substrate 800.
  • the present invention is not limited thereto, and when the first coil 810 is disposed on the lower surface of the substrate 800, the second coil 890 may be disposed below the vertical direction of the first coil 810.
  • the manufacturing process may be simplified and the cost may be reduced.

Landscapes

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

Abstract

Un dispositif de transmission d'énergie sans fil, selon le présent mode de réalisation de la présente invention, comprend : un substrat; une première bobine formée sur le substrat; et une seconde bobine formée de manière à correspondre à la première bobine, la première bobine et la seconde bobine étant des types différents de bobines ayant différentes valeurs de résistance et étant connectées en parallèle.
PCT/KR2017/011427 2016-10-18 2017-10-17 Dispositif de transmission d'énergie sans fil WO2018074803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160134883A KR20180042578A (ko) 2016-10-18 2016-10-18 무선전력 송신 장치
KR10-2016-0134883 2016-10-18

Publications (1)

Publication Number Publication Date
WO2018074803A1 true WO2018074803A1 (fr) 2018-04-26

Family

ID=62018616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/011427 WO2018074803A1 (fr) 2016-10-18 2017-10-17 Dispositif de transmission d'énergie sans fil

Country Status (2)

Country Link
KR (1) KR20180042578A (fr)
WO (1) WO2018074803A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019231168A1 (fr) * 2018-05-30 2019-12-05 엘지이노텍 주식회사 Bobine de charge sans fil
KR102209058B1 (ko) * 2020-08-14 2021-01-28 아비코전자 주식회사 무선전력전송장치의 전력변환유닛
EP4220895A4 (fr) 2021-01-29 2024-06-05 Samsung Electronics Co., Ltd. Appareil électronique de transmission d'énergie sans fil et procédé de charge sans fil l'utilisant
US11848573B2 (en) 2021-04-08 2023-12-19 Samsung Electronics Co., Ltd. Wireless power transmission apparatus and control method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110035196A (ko) * 2009-09-30 2011-04-06 한국전기연구원 스파이럴 안테나 및 스파이럴 안테나를 이용한 무선전력전송장치
KR20130108050A (ko) * 2012-03-23 2013-10-02 엘지이노텍 주식회사 무선전력 수신장치 및 그 제조 방법
KR20150125525A (ko) * 2014-04-30 2015-11-09 삼성전기주식회사 무선 전력 수신 장치 및 이를 구비하는 전자기기
KR101594380B1 (ko) * 2015-03-04 2016-02-16 엘지전자 주식회사 이동 단말기 및 코일 안테나 모듈
KR20160057278A (ko) * 2014-11-13 2016-05-23 엘지전자 주식회사 무선 전력 전송 장치, 무선 전력 수신 장치 및 무선 충전 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110035196A (ko) * 2009-09-30 2011-04-06 한국전기연구원 스파이럴 안테나 및 스파이럴 안테나를 이용한 무선전력전송장치
KR20130108050A (ko) * 2012-03-23 2013-10-02 엘지이노텍 주식회사 무선전력 수신장치 및 그 제조 방법
KR20150125525A (ko) * 2014-04-30 2015-11-09 삼성전기주식회사 무선 전력 수신 장치 및 이를 구비하는 전자기기
KR20160057278A (ko) * 2014-11-13 2016-05-23 엘지전자 주식회사 무선 전력 전송 장치, 무선 전력 수신 장치 및 무선 충전 시스템
KR101594380B1 (ko) * 2015-03-04 2016-02-16 엘지전자 주식회사 이동 단말기 및 코일 안테나 모듈

Also Published As

Publication number Publication date
KR20180042578A (ko) 2018-04-26

Similar Documents

Publication Publication Date Title
WO2017065413A1 (fr) Procédé de charge sans fil à bobines multiples, ainsi que dispositif et système associés
WO2019022438A1 (fr) Dispositif bobine et dispositif de charge sans fil le comprenant
WO2017094997A1 (fr) Dispositif de charge sans fil, procédé de transmission d'énergie sans fil s'y rapportant, et support d'enregistrement pour le procédé
WO2017061716A1 (fr) Procédé et dispositif de guidage de l'alignement d'un dispositif de charge sans fil et système associé
WO2018074803A1 (fr) Dispositif de transmission d'énergie sans fil
WO2014038862A1 (fr) Emetteur de puissance sans fil pour exclure un récepteur de puissance sans fil interconnecté et procédé pour commander celui-ci
WO2017043841A1 (fr) Émetteur d'énergie sans fil et son procédé de commande
WO2017078256A1 (fr) Procédé de charge sans fil multi-bobines, ainsi que dispositif et système associés
WO2017078285A1 (fr) Émetteur d'énergie sans fil
WO2014010951A1 (fr) Émetteur de puissance sans fil, récepteur de puissance sans fil, et procédé pour commander ceux-ci
WO2013036067A2 (fr) Récepteur d'énergie sans fil et procédé correspondant pour son contrôle
WO2016133322A1 (fr) Dispositif de transmission d'énergie sans fil et procédé de transmission d'énergie sans fil
WO2019039898A1 (fr) Appareil et procédé permettant d'exécuter une communication dans un système de transmission de puissance sans fil
WO2017138713A1 (fr) Dispositif électrique sans fil ayant une pluralité de bobines d'émission et son procédé de pilotage
WO2017142234A1 (fr) Procédé de charge sans fil et appareil et système associés
CN109247039A (zh) 无线充电方法及其装置和系统
WO2019045350A2 (fr) Procédé et dispositif de transmission d'énergie sans fil
WO2019151693A1 (fr) Récepteur de charge sans fil permettant d'améliorer les performances d'une antenne
WO2017138712A1 (fr) Procédé de charge sans fil et dispositif et système associés
WO2018101677A1 (fr) Dispositif récepteur d'énergie sans fil
WO2018151441A1 (fr) Émetteur d'énergie sans fil ayant une structure de blindage électromagnétique
WO2019194419A1 (fr) Dispositif de charge sans fil
KR102702930B1 (ko) 무선 전력 제어 방법 및 장치
WO2019013480A1 (fr) Dispositif de charge sans fil ayant une bobine de communication sans fil
WO2018182165A1 (fr) Émetteur d'énergie sans fil et procédé de commande d'émetteur d'énergie sans fil

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: 17862149

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: 17862149

Country of ref document: EP

Kind code of ref document: A1