WO2016052806A1 - Appareil de transmission de puissance sans fil à zone étendue et procédé utilisant la synchronisation multiple de champs magnétiques - Google Patents

Appareil de transmission de puissance sans fil à zone étendue et procédé utilisant la synchronisation multiple de champs magnétiques Download PDF

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Publication number
WO2016052806A1
WO2016052806A1 PCT/KR2014/011401 KR2014011401W WO2016052806A1 WO 2016052806 A1 WO2016052806 A1 WO 2016052806A1 KR 2014011401 W KR2014011401 W KR 2014011401W WO 2016052806 A1 WO2016052806 A1 WO 2016052806A1
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WIPO (PCT)
Prior art keywords
magnetic field
coil module
phase
power
adjacent
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PCT/KR2014/011401
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English (en)
Korean (ko)
Inventor
임춘택
이은수
최수용
손영훈
정석용
구범우
최보환
원유진
김지훈
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한국과학기술원
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Publication of WO2016052806A1 publication Critical patent/WO2016052806A1/fr

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    • 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
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/085—Generating magnetic fields therefor, e.g. uniform magnetic field for magnetic domain stabilisation
    • 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
    • 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
    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/16—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using ac to ac converters without intermediate conversion to dc

Definitions

  • This embodiment relates to a method and apparatus for wirelessly transmitting power over a wide area using multiple synchronizations of a magnetic field.
  • Wireless power transfer refers to a technology for supplying power to home appliances or electric vehicles wirelessly instead of wired power lines, and because of the advantage of using a power cable to wirelessly charge a device that requires power without being connected to a power outlet. Related research is actively underway.
  • This embodiment is primarily intended to provide an even magnetic field over a wide range using several transmitting coil modules that are single or synchronously controlled.
  • a plurality of coil modules for generating a magnetic field evenly and receiving a radiated or radiated magnetic field and an alternating current power provided to the plurality of coil modules, respectively,
  • a magnetic field generated in each of the plurality of coil modules by using a plurality of receivers receiving one of induction current and a synchronization signal transmitted by a control device connected to the adjacent coil module and the plurality of receivers are the same.
  • a plurality of agents each controlling the plurality of inverters to have a phase A plurality of power supply devices for providing the AC power to the device and the plurality of coil modules, respectively, and between the power supply device and the plurality of inverters to control the connection between the power supply device and each of the plurality of inverters. It provides a wireless power transmission device comprising a switch of.
  • a plurality of coil modules for generating a magnetic field evenly and receiving radiated or radiated magnetic fields and an alternating current power provided to the plurality of coil modules, respectively,
  • the central controller and the plurality of coil modules respectively, to control the plurality of inverters at a time such that a plurality of inverters converting a frequency or a phase and a magnetic field generated in the plurality of coil modules have the same phase, respectively.
  • a plurality of switches positioned between the power supply device and each of the plurality of inverters to control the connection between the power supply device and each of the plurality of inverters.
  • the apparatus for controlling the transmission of power wirelessly generated in the predetermined coil module by a magnetic field generated from a coil module adjacent to a predetermined coil module or a magnetic field generated from the adjacent coil module.
  • a receiver for receiving a synchronization signal generated from a wireless power transmission control device connected to a coil module adjacent to a predetermined coil module and the receiver receives A control unit for controlling a phase of an AC power source so that a magnetic field having the same phase as the adjacent coil module is generated using one synchronization signal, and a transmitting unit for transmitting the synchronization signal for controlling the phase of the AC power source to another adjacent coil module It provides a wireless power transmission control device comprising a.
  • the process of detecting the direction and magnitude of the magnetic field generated from the coil module adjacent to the predetermined coil module and the direction and magnitude of the detected magnetic field Determining, selecting a reference magnetic field of the adjacent coil module, determining a phase of the selected reference magnetic field, and controlling an inverter connected to the preset coil module to have a phase of the determined reference magnetic field. It provides a wireless power transmission control method characterized in that.
  • the process of transmitting and receiving a synchronization signal between the inverter using the wireless communication between the inverter (Inverter) and the coil module is the maximum It provides a wireless power transmission control method comprising the step of controlling the inverter connected to the predetermined coil module using a synchronization signal transmitted and received to generate an equal magnetic field of the.
  • an even magnetic field can be generated to the maximum in the transmission coil, and power can be transmitted over a long distance.
  • FIG. 1A is a diagram illustrating a wireless power transmission system according to an embodiment of the present invention.
  • 1B is a diagram illustrating a wireless power transmission system according to another embodiment of the present invention.
  • Figure 2a is a block diagram showing the configuration of a control device according to an embodiment of the present invention.
  • Figure 2b is a block diagram showing the configuration of a control device according to another embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating a control method according to an embodiment of the present invention.
  • FIG. 4A illustrates a transmission coil module according to an embodiment of the present invention.
  • Figure 4b is a view showing the shape of the magnetic field generated from the transmitting coil module according to an embodiment of the present invention.
  • FIG. 5 is a view showing the shape and configuration of a transmitting coil module according to another embodiment of the present invention.
  • FIG. 1A illustrates a wireless power transfer system in accordance with one embodiment of the present invention.
  • a wireless power transmission system includes a coil module 110, an inverter 120, a switch 130, a power supply device 140, a receiving device 150, and a control device. 160.
  • the coil module 110 receives AC power from the power supply device 150 and generates a magnetic field.
  • the receiving end receives the generated magnetic field.
  • the receiving end induces a potential difference at the receiving end (not shown) due to the flowing magnetic field.
  • Inverter 120 serves to convert the frequency or phase of the AC power provided by the power supply unit to the coil module. In order for the coil module to generate an even magnetic field, AC power having no phase difference or a constant phase difference should be supplied according to the type of coil module, and the inverter 120 converts the phase of the AC power provided to the coil module. Can be.
  • the inverter 120 may be connected together with a resonant capacitor (not shown).
  • the inverter serves to cancel the inductance component of the transmitter.
  • the reactance of the winding (2 ⁇ * f * L) is too large, which increases the apparent power that the inverter must handle.
  • Capacitors have a negative reactance (-1 / (2 ⁇ * f * C)), so if they are connected in series with the windings, the reactance cancels out, resulting in a small overall impedance. This allows the inverter to drive the windings with less apparent power.
  • the switch 130 determines whether to provide AC power provided by the power supply unit to the coil module.
  • the switch 130 is positioned between each coil module and the power supply device to determine whether AC power is supplied to each coil module according to whether each switch 140 is turned on or off.
  • the power supply device 140 supplies power to generate a magnetic field in the coil module.
  • An AC power source having 60 Hz may be supplied as an AC power source for the operation of the power supply device, but the present invention is not limited thereto.
  • the receiving device 150 receives one of a synchronization signal generated from an adjacent control device, a magnetic field generated from an adjacent coil module, and an induced current generated from the coil module.
  • the receiver 150 may receive a synchronization signal for synchronizing a magnetic field generated in each coil module from an adjacent control device.
  • the receiving device 150 may receive the synchronization signal of the adjacent control device by wire communication such as a power communication line for the AC power supply device to transfer AC power to the coil module, or may receive by wireless communication.
  • the receiver 150 may include a separate magnetic field sensing device to receive a magnetic field generated by an adjacent coil module.
  • the coil module to which the receiver is connected receives the magnetic field generated by the adjacent coil module, and the coil module to which the receiver is connected generates the induced current by the magnetic field.
  • the receiver 150 may receive the induced current.
  • the controller 160 controls the inverter to have a maximum value of an equal magnetic field generated in the coil module by using any one of a synchronization signal, a magnetic field, and an induced current received from the receiver. Since the receiving end should be able to receive power wirelessly anytime and anywhere in the area where the power can be wirelessly received, the magnetic field should be distributed as evenly as possible in the area where the power can be wirelessly received. Even if a plurality of coil modules generate an equal magnetic field, interference may occur between the equal magnetic fields generated in each coil module. Therefore, in order to prevent such interference, the control device controls an inverter connected to each coil module to synchronize a magnetic field generated in each coil module.
  • FIG. 1B illustrates a wireless power transfer system according to another embodiment of the present invention.
  • a wireless power transmission system may include a coil module 110, an inverter 120, a switch 130, a power supply device 140, and a central controller 170. Include.
  • the central control unit 170 is connected to each inverter serves to control all the inverters at once. One method of synchronizing the magnetic fields generated in each coil module, the central control unit controls all the inverters at once.
  • the central controller can control the inverter all at once to supply AC power with the same phase and frequency, and the coil module that receives AC power with the same phase and frequency generates an equal magnetic field of the same phase so Generate a magnetic field.
  • the central control unit is shown as being wired to the control unit, but may be wirelessly connected to each control unit.
  • Figure 2a is a block diagram showing the configuration of a control device according to an embodiment of the present invention.
  • a control device includes a detector 210, a selector 220, a determiner 230, and a controller 240.
  • the detector 210 receives the induced current or the magnetic field from the receiver 150 shown in FIG. 1 and detects the direction and magnitude of the magnetic field.
  • the detector 210 may receive the induced current or the magnetic field generated by the receiver shown in FIG. 1, and may detect the direction and magnitude of the magnetic field using the magnetic sensor from the received induced current or the magnetic field.
  • the selector 220 determines the direction and magnitude of the magnetic field detected by the detector, and selects the reference magnetic field.
  • the detected magnetic field is selected as a reference magnetic field to determine the direction and magnitude of the selected reference magnetic field.
  • the sensing unit detects more than one magnetic field, the direction of the selected magnetic field is determined by comparing the magnitude of the detected magnetic field with the largest magnetic field selected as the reference magnetic field.
  • any magnetic field is selected as the reference magnetic field.
  • the determination unit 230 determines the phase of the reference magnetic field having the direction and magnitude selected by the selection unit.
  • the determination unit 230 may include a phase locked loop (PLL) circuit to determine the phase of the selected reference magnetic field.
  • the determination unit 230 may determine the phase of the reference magnetic field selected by the selector from the PLL circuit.
  • PLL phase locked loop
  • the controller 240 controls the inverter to have a phase of the reference magnetic field determined by the determination unit.
  • the inverter module is controlled to control the phase of the AC power provided to the coil module connected to the control device so that the coil module connected to the control device has a phase of the reference magnetic field to generate the maximum equal magnetic field.
  • the controller controls the inverter or the switch so that the coil module connected to the control unit receives the magnetic field generated by the adjacent coil module, thereby stopping the role of the winding in which the coil module connected to the control unit generates the magnetic field for a certain period of time within an operation cycle. Can be controlled.
  • the inverter may increase the frequency of the AC power so that the coil module connected to the control device does not generate a magnetic field for a predetermined time, or may be controlled to turn off the switch so that the coil module connected to the control device does not generate a magnetic field. During this time, the coil module connected to the control device receives the magnetic field generated by the adjacent coil module, and the receiving device shown in FIG. 1 receives the induced current.
  • the controller controls the power supply phase that has been stopped for a certain period of time to have a phase of the power source that would have had not been stopped for a certain period of time. Accordingly, the control unit controls to have the same phase of the magnetic field generated before stopping for a predetermined time. For example, when the control unit controls to stop for a predetermined time, the control unit stores the phase of the AC power supplied to the coil module connected to the existing control device, and controls to generate a magnetic field again. According to the present invention, AC power may be provided to the coil module connected to the control device.
  • the phase of the reference magnetic field determined by the determination unit 240 may be different from the magnetic field to be generated depending on the phase of the stored AC power from the magnetic field received by the coil module connected to the control device.
  • the controller controls the inverter to have a phase of the reference magnetic field determined by the determination unit 240 from the magnetic field received by the coil module connected to the control device.
  • Each component included in the control device 130 is connected to a communication path connecting a software module or a hardware module inside the device to operate organically with each other. These components communicate using one or more communication buses or signal lines.
  • Figure 2b is a block diagram showing the configuration of a control device according to another embodiment of the present invention.
  • a control device includes a controller 250 and a transmitter 260.
  • the control unit 250 illustrated in FIG. 2B serves to control the inverter similarly to the control unit 240 illustrated in FIG. 2A, and the coil module connected to the control unit serves as a winding in which a magnetic field is generated for a predetermined time in an operation cycle. You can control it to stop.
  • the difference is that the control unit shown in FIG. 2B receives the synchronization signal from the receiving device 150 shown in FIG. 1A. The inverter is controlled from the received synchronization signal so that the maximum equal magnetic field is generated.
  • the transmitter 260 transmits a synchronization signal to be transmitted to the other controller connected to the adjacent coil module by the controller 250 to another receiver connected to the adjacent coil module.
  • Each component included in the control device 130 is connected to a communication path connecting a software module or a hardware module inside the device to operate organically with each other. These components communicate using one or more communication buses or signal lines.
  • 3A is a flowchart illustrating a control method according to an embodiment of the present invention.
  • the preset coil module detects the direction and magnitude of the magnetic field generated from the coil module adjacent to the preset coil module (S310).
  • the preset coil module senses the direction and magnitude of the magnetic field by receiving a induced current from the receiver of the control device or by receiving a magnetic field directly generated from the coil module adjacent to the preset coil module.
  • the preset coil module may receive the induced current generated in the receiver of the control device and may receive the induced current from the preset coil module.
  • the preset coil module controls the inverter or the switch to stop the role of the winding generating the magnetic field for a predetermined period of time.
  • the inverter lowers the frequency of the AC power source so that the preset coil module does not generate a magnetic field for a certain period of time, or the switch may be turned off so that the preset coil module does not generate a magnetic field.
  • the preset coil module receives the magnetic field generated by the adjacent coil module, and thus receives the induced current generated by the receiver of the control device and detects the direction and magnitude of the magnetic field of the adjacent coil module by using the received current.
  • the reference magnetic field of the adjacent coil module is selected by determining the direction and magnitude of the detected magnetic field (S320). If there is one magnetic field detected, the detected magnetic field is selected as the reference magnetic field. If there is more than one magnetic field detected, the largest magnetic field is selected as the reference magnetic field by comparing the magnitude of the detected magnetic field. When the strengths of the magnetic fields are the same, any magnetic field is selected as the reference magnetic field.
  • the phase of the selected reference magnetic field is determined (S330).
  • the phase of the selected reference magnetic field can be determined through the PLL circuit.
  • the inverter is connected to the coil module preset to have the determined reference magnetic field (S340).
  • the inverter is controlled to control the phase of the AC power provided to the preset coil module so that the preset coil module has the phase of the reference magnetic field to generate the maximum equal magnetic field.
  • 3B is a flowchart illustrating a control method according to another embodiment of the present invention.
  • each controller uses a power communication line for providing AC power to the coil module, and transmits and receives a synchronization signal between the inverter (S350). Rather than detecting the direction and magnitude of the magnetic field from adjacent coil modules, each controller sends and receives inverter synchronization signals between the controllers.
  • the coil module controls the inverter connected to the preset coil module by using the synchronization signal transmitted and received to generate the maximum equal magnetic field (S360).
  • the controller uses the inverter synchronization signal of the adjacent controller received from the receiver to control the inverter in accordance with the received synchronization signal.
  • 3C is a flowchart illustrating a control method according to another embodiment of the present invention.
  • each controller uses the wireless communication between the control device, and transmits and receives a synchronization signal between the inverter (S370). Rather than detecting the direction and magnitude of the magnetic field from adjacent coil modules, each controller transmits and receives inverter synchronization signals between the controllers using wireless communication.
  • the coil module controls the inverter connected to the preset coil module by using the synchronization signal transmitted and received to generate the maximum equal magnetic field (S380).
  • the controller uses the inverter synchronization signal of the adjacent controller received from the receiver to control the inverter in accordance with the received synchronization signal.
  • FIGS. 3A, 3B and 3C processes S310 to S380 are sequentially executed, but this is merely illustrative of the technical idea of an embodiment of the present invention.
  • one of ordinary skill in the art to which an embodiment of the present invention belongs may execute the process described in FIGS. 3A, B, and C without changing the order described in FIGS. 3A, b and c are not limited to the time-series order because they may be variously modified and modified by executing one or more processes of the process S380 in parallel.
  • the processes illustrated in FIGS. 3A, B, and C may be implemented as computer readable codes on a computer readable recording medium.
  • the computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. That is, the computer-readable recording medium may be a magnetic storage medium (for example, ROM, floppy disk, hard disk, etc.), an optical reading medium (for example, CD-ROM, DVD, etc.) and a carrier wave (for example, the Internet Storage medium).
  • the computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.
  • Figure 4a is a diagram showing a transmitting coil module according to an embodiment of the present invention
  • Figure 4b is a view showing the shape of the magnetic field generated from the transmitting coil module according to an embodiment of the present invention.
  • FIG. 4A is a perspective view of a straight transmission coil module 410.
  • the winding 420 is spiral wound around the ferrite core 430.
  • the winding 420 is a Litz Wire and the diameter may be set to 5mm.
  • the current flowing in the linear transmission coil module 410 induces a magnetic field.
  • the magnetic field flowing into the receiver (not shown) induces a potential difference at the receiver.
  • the magnetic flux density of the linear transmission coil module 410 has a maximum value at the center of the core and decreases toward the end. Thus, most of the hysteresis losses occur in the center of the core. Since the magnetic flux density is divided by the vertical area that transmits the total amount of magnetic fluxes, the magnetic flux density can be lowered if the cross-sectional area of the central portion is widened. In addition, both ends of the core need not be as wide a cross-section as the middle. Therefore, if the center part is thickened and the shape is made thinner toward both ends, the magnetic flux density is uniformly induced.
  • a strong magnetic field must be created for long distance power transmission.
  • the winding itself is a problem because a large magnetoresistance occurs in the winding inner space.
  • Long cores are inserted into the windings to reduce this magnetoresistance.
  • the winding with the core inserted has a reduced magnetic resistance compared to the winding without the core, thereby increasing the magnetic flux density.
  • the magnetic field is inversely proportional to the cube R3 of the distance R with respect to the x-axis direction.
  • the magnetic field generated by the linear transmitting coil module 410 is inversely proportional to the distance R to the square of the distance R2 with respect to the x-axis direction. Therefore, in the transmitting coil module of FIG. 4A, the magnetic flux density is increased by the ferrite core, and the loss according to the distance of the generated magnetic field is also increased compared with the conventional transmitting coil module.
  • 4B is shown based on values simulated with ANSOFT MAXWELL v14.0.
  • 4B is a magnetic force diagram around a transmitting coil module and a receiving coil module. It can be seen that a plurality of magnetic force lines generated in the transmitting coil module are chained to the receiving coil module. Longer anode cores must be used to increase the linkage of the magnetic field lines. When the length of the ferrite core is extended to the outside of the winding area unlike the general core, the magnetoresistance can be lowered by increasing the binding factor of the winding. In the long distance transmission, the longer the winding length, the larger magnetic flux density is measured in the receiving coil module. Since the voltage induced in the receiving coil module is proportional to the magnetic flux density passing through the winding, the core should be long for long distance transmission.
  • FIG. 5 is a view showing the shape and configuration of a transmitting coil module according to another embodiment of the present invention.
  • Transmission coil module 910 has a Yagi antenna form.
  • Several linear transmission coil modules shown in FIG. 4A may be arranged around a predetermined reference axis in a direction perpendicular to the reference axis.
  • the magnetic field reflection coil module 920 may be additionally installed. As illustrated in FIG. 9, the magnetic field reflection coil module 920 may be installed in a direction perpendicular to the transmitting coil module emitting a magnetic field or may face the transmitting coil module emitting a magnetic field.
  • the magnetic field reflection coil module 920 may include a resonance capacitor.
  • switch 140 power supply
  • central control unit 210 detection unit
  • control unit 250 control unit
  • transmitter 410 linear transmission coil module

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un appareil et un procédé de transmission de puissance sans fil à zone étendue à l'aide d'une synchronisation multiple de champs magnétiques. Selon un aspect d'un mode de réalisation, la présente invention concerne un appareil et un procédé de transmission de puissance sans fil, l'appareil et le procédé fournissant un champ magnétique uniforme pour une zone étendue à l'aide d'une pluralité de modules de bobine de transmission simples ou commandés de manière synchronisée.
PCT/KR2014/011401 2014-10-02 2014-11-26 Appareil de transmission de puissance sans fil à zone étendue et procédé utilisant la synchronisation multiple de champs magnétiques WO2016052806A1 (fr)

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KR1020140133145A KR101730157B1 (ko) 2014-10-02 2014-10-02 자기장의 다중 동기를 이용한 광역 무선전력 전송 장치 및 방법
KR10-2014-0133145 2014-10-02

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WO2018190581A1 (fr) * 2017-04-12 2018-10-18 Samsung Electronics Co., Ltd. Émetteur d'énergie sans fil, dispositif électronique de réception d'énergie sans fil, et procédé de fonctionnement associé
KR20220077966A (ko) * 2020-12-02 2022-06-10 삼성전자주식회사 무선 전력을 전송하는 전자 장치와 이의 동작 방법
IL313091A (en) * 2022-02-04 2024-07-01 Wipowerone Inc A multi-phase power supply mechanism for a method of transmitting electricity and wireless control

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US20140103711A1 (en) * 2011-06-09 2014-04-17 Toyota Jidosha Kabushiki Kaisha Contactless power receiving device, vehicle equipped with the same, contactless power transmitting device, and contactless power transfer system
KR20140107305A (ko) * 2011-12-22 2014-09-04 주식회사 한림포스텍 무선 전력전송장치 및 방법
WO2013122483A1 (fr) * 2012-02-16 2013-08-22 Auckland Uniservices Limited Coussin à flux à bobines multiples
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