Electromagnet Or Highly Inductive Systems Patents (Class 307/104)
  • Patent number: 11031824
    Abstract: An RF energy harvesting apparatus comprising an energy harvesting antenna carried on a substrate for fixing the antenna to an electrical device, wherein the antenna comprises a coil of conductive material carried on the substrate, wherein the coil provides two loops of conductive material on the substrate, the coil comprising a second loop inside a first loop; and wherein the coil comprises at least one segment arranged to reduce spatial variations in the H-field in an area circumscribed by the first loop.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: June 8, 2021
    Assignee: DRAYSON TECHNOLOGIES (EUROPE) LIMITED
    Inventors: Aline Coelho De Souza, Bruno Roberto Franciscatto, Manuel Pinuela Rangel, Vitor Freitas, Diana Stefan
  • Patent number: 11031829
    Abstract: A wireless power transmitter including a power conversion unit configured to transmit wireless power generated based on magnetic coupling in a power transfer phase and a control unit configured to receive, from the wireless power receiver operating at a first operating point, a first received power packet of the first operating point and a second received power packet of the first operating point based on the first received power packet of the first operating point and the second received power packet of the first operating point and configured to receive a first received power packet of the second operating point and a second received power packet of the second operating point related to power calibration and construct a second power calibration curve based on the first received power packet of the second operating point and the second received power packet of the second operating point.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: June 8, 2021
    Assignee: LG Electronics Inc.
    Inventors: Yongcheol Park, Gyunghwan Yook
  • Patent number: 11031820
    Abstract: A power transmitting device transmits power to a power receiving device having a power receiving coil, in water. The power transmitting device includes one or more annular transmitting coils including a power transmitting coil configured to transmit the power to the power receiving coil via a magnetic field, a support member located in an inner space of the transmitting coil, which is formed by the annular transmitting coil, the support member including an outer periphery along an inner periphery of the annular transmitting coil, and supporting the transmitting coil from the inner space, a power transmitting unit configured to supply A/C power to the power transmitting coil, and a capacitor connected to the transmitting coil, and forming a resonance circuit resonating together with the transmitting coil.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: June 8, 2021
    Assignee: PANASONIC CORPORATION
    Inventors: Katsuya Okamoto, Souichi Kawata, Kazuhiro Eguchi, Ryosuke Hasaba, Yoshio Koyanagi, Tamaki Ura
  • Patent number: 11031826
    Abstract: Inductive power transfer flux coupling apparatus includes a first coil arranged in a first layer and configured to generate or receive a magnetic coupling flux in a flux coupling region, and a second coil. At least part of the second coil being arranged in a second layer and is configured to generate a magnetic flux that reflects flux from the first coil.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: June 8, 2021
    Assignee: Auckland Uniservices Limited
    Inventors: John Talbot Boys, Grant Anthony Covic, Abiezer Tejeda Marquez, Matthew Pearce, James Duncan Deans Gawith
  • Patent number: 11031817
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes a plurality of coils for wireless charging the one or more receiver devices. The wireless charging system may use a machine learning algorithm to detect the one or more receiver devices and select which of the multiple coils to activate for charging the multiple coils. Based on measurements made from signal through the coils within the wireless charging system, the machine learning algorithm determines a subset of the coils to activate for charging the detected one or more receiver devices.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: June 8, 2021
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Lixin Shi, Xiaoping Zhu
  • Patent number: 11025098
    Abstract: A wireless power transmission system has a wireless power receiving device with a wireless power receiving coil that is located on a charging surface of a wireless power transmitting device with a wireless power transmitting coil array. Control circuitry in the wireless power transmitting device may use inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. The control circuitry may also be used to detect foreign objects on the coil array such as metallic objects without wireless power receiving coils. For example, control circuitry may use inductance measurements from the coils in the coil array to determine a probability value indicative of whether a foreign object is present on the charging surface. The control circuitry may compare the probability value to a threshold and take suitable action in response to the comparison.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: June 1, 2021
    Assignee: Apple Inc.
    Inventors: Behrooz Shahsavari, Sneha Kadetotad, Weiyu Huang, Baboo V. Gowreesunker
  • Patent number: 11025101
    Abstract: A wireless power transmitter for charging a wireless power receiver is provided. The wireless power transmitter includes a power transmission unit configured to transmit power for charging the wireless power receiver, by using a current applied to the power transmission unit, a communication module configured to receive out-of-band communication signal from the wireless power receiver and a controller configured to apply the current to the power transmission unit to transmit power in response to receiving the out-of-band communication signal from the wireless power receiver.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: June 1, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung-Koo Chung, Sung-Ku Yeo, Ki-Young Kim
  • Patent number: 11025099
    Abstract: A system, an apparatus, and a method for wireless power transfer are provided. The system includes a plurality of wireless power transmitters and at least one receiver. The at least one receiver is configured to receive the power wirelessly transmitted at least one wireless power transmitter of the plurality of wireless power transmitters. The plurality of wireless transmitters is configured to wirelessly transmit power. Each wireless power transmitter is positioned at a different location and/or orientation. Each wireless power transmitter is an active power source or a passive relay power source. The one or more wireless power transmitters are identified for power transmission based on a plurality of factors including at least presence of obstacles in transmission paths.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: June 1, 2021
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Murat Mese, John Walley
  • Patent number: 11025102
    Abstract: Methods and apparatus are disclosed of a wireless power transmission system (WPTS) and wireless power receiver client (WPRC). The WPTS may directionally transmit wireless power to a first WPRC while concurrently directionally transmitting wireless data to at least a second WRPC. The WPTS and WPRC may reuse circuitry configured to transmit/receive wireless power to also transmit/receive wireless data.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: June 1, 2021
    Assignee: OSSIA INC.
    Inventors: Hatem I. Zeine, Robert Giometti
  • Patent number: 11018527
    Abstract: A wireless power supply assembly and an electronic device are disclosed. By providing a gap between the magnetic sheet and the coil, dense magnetic lines of force closely abutting the coil pass through the gap to avoid passing through the magnetic sheet, thereby reducing loss due to the magnetic sheet. At the meanwhile, it is also possible to further avoid significant changes in coil inductance parameters caused by horizontal offset between the coil and the magnetic sheet due to installation errors, reduce the sensitivity of the resonance compensation capacitance of the wireless power supply assembly to the position and further reduce the loss. The present disclosure can effectively reduce the loss of the wireless power supply system and improve wireless power transmission efficiency.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: May 25, 2021
    Assignee: NINGBO WEIE ELECTRONICS TECHNOLOGY LTD.
    Inventors: Feng Yu, Weiyi Feng
  • Patent number: 11018524
    Abstract: An inductive power system including an inductive power transmitter coupled to a non-conductive medium, and a power cord that electrically couples the transmitter to an AC power source. The inductive power transmitter is configured to emit an electromagnetic field based on the received AC power. There is an inductive power receiver coupled to the non-conductive medium and separated from the transmitter, wherein the receiver is configured to receive the electromagnetic field after it has passed through the non-conductive medium and in response develop power. A power cord electrically couples the developed power to a power sink.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: May 25, 2021
    Inventors: David Simpson, Linda Kennyhertz
  • Patent number: 11018779
    Abstract: A method includes receiving a wireless communication signal indicating that a receiver is within a wireless-power-transmission range of a transmitter. In response to the receiving, the method further includes transmitting a plurality of radio frequency (RF) test signals using at least two test phases for a respective antenna. The method further includes receiving information identifying a first amount of power delivered to the receiver by a first RF test signal transmitted at a first of the at least two test phases, receiving information identifying a second amount of power delivered to the receiver by a second RF test signal transmitted at a second of the at least two test phases, and determining, based on the first and second amounts of power, an optimal phase for the respective antenna.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: May 25, 2021
    Assignee: Energous Corporation
    Inventor: Amir Sarajedini
  • Patent number: 11018618
    Abstract: This invention relates to a roofing panel for interconnection with one or more additional roofing panels. The roofing panel comprises a PV cell coupled to an inverter, and wireless (or optionally wired) power transfer circuitry for transmitting power to another roofing panel and/or the AC grid and/or to an AC inverter, and/or for receiving power from another roofing panel.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: May 25, 2021
    Assignee: Zinniatek Limited
    Inventors: Andrew Leo Haynes, Ashton Cyril Partridge, David J. Bates, Pengcheng Liu, Seng Oon Toh, Sing Kiong Nguang, Sorin Spanoche
  • Patent number: 11017284
    Abstract: A highly reliable RFID tag is provided that is lighter and smaller and has a desired communication distance, and that can be applied to deformable articles. The RFID tag includes a first end of a first power feeding coil that is connected to a first input and output terminal of an RFIC element, a second end of the first power feeding coil that is connected to one end of a second power feeding coil, and the other end of the second power feeding coil is connected to a second input and output terminal of the RFIC element. Moreover, the RFID tag has a spring-shaped antenna that has a first region with magnetic field coupling of the first power feeding coil, and a second region with magnetic field coupling of the second power feeding coil. The first region and the second region are continuous via a region having an inductance component.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: May 25, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuki Eshima, Noboru Kato
  • Patent number: 11011935
    Abstract: A system for providing electrical power to a remote device through wireless transmission and the system comprises a power transmitting data unit (PTDU) receiving electrical power from a power source and at least one power receiving data unit (PRDU), connected to the remote device, receiving electromagnetic waves and converting the electromagnetic waves to the electrical power. The PTDU further comprises a controller, a first resonator emitting electromagnetic waves, and a DC/AC converter receiving electrical power from a remote power source and providing a driving voltage at a driving frequency to the first resonator, the driving frequency being independent from a resonant frequency of the first resonator, and the controller monitors environment variables related to the emitting of electromagnetic waves.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: May 18, 2021
    Assignee: SWR Technology Inc.
    Inventors: Wenching Hsiao, Shengming Shan
  • Patent number: 11007887
    Abstract: An induction coil for wireless charging of a vehicle battery is described. The induction coil includes an electrically conductive tube configured as multiple windings, and an electrically conductive coupler configured for attachment to the electrically conductive tube. The electrically conductive tube and the electrically conductive coupler are adapted to conduct an alternating current. Alternating current flow in the tube and the plurality of windings generates a magnetic field for wireless inductive charging of the vehicle battery. The electrically conductive tube and the electrically conductive coupler are each configured for passage of a coolant therethrough. A coolant flow through the electrically conductive tube transfers heat from the electrically conductive tube generated by alternating current flow through the electrically conductive tube.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: May 18, 2021
    Assignee: LEAR CORPORATION
    Inventors: Ajmal Imran Ansari, William J. Hayes, Randall Todd Sinnaeve
  • Patent number: 11011946
    Abstract: A method for controlling a wireless power transmitter for charging a wireless power receiver may comprise the operations of: transmitting power for charging; receiving a first PRU dynamic signal indicating completion of charging, from the wireless power receiver, applying a beacon for detecting the wireless power receiver on the basis of a load change to a resonance circuit of the wireless power transmitter; receiving, from the wireless power receiver, a first advertisement signal including information indicating that charging is not requested; and ignoring the advertisement signal and maintaining application of the beacon.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: May 18, 2021
    Inventors: Kyung-Woo Lee, Hee-Won Jung, Sang-Wook Kwon, Kang-Ho Byun
  • Patent number: 11011944
    Abstract: A foreign object detection device for a wireless power transfer system includes a storage unit that stores first coil device information including a shape and a size of a first coil facing surface, a height position from the reference surface, and a height position of a first device facing surface; an information acquiring unit that acquires second coil device information including a shape, a size, and a height position of a second coil facing surface, and a height position of a second device facing surface; a region identifying unit that identifies a magnetic field generation region generated between the first device facing surface and the second device facing surface during power feeding, based on the first coil device information and the second coil device information; and a foreign object detection unit that detects the presence or absence of a foreign object within the identified magnetic field generation region.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: May 18, 2021
    Assignee: IHI Corporation
    Inventor: Motonao Niizuma
  • Patent number: 11007371
    Abstract: Implantable devices and/or sensors can be wirelessly powered by controlling and propagating electromagnetic waves in a patient's tissue. Such implantable devices/sensors can be implanted at target locations in a patient, to stimulate areas such as the heart, brain, spinal cord, or muscle tissue, and/or to sense biological, physiological, chemical attributes of the blood, tissue, and other patient parameters. The propagating electromagnetic waves can be generated with sub-wavelength structures configured to manipulate evanescent fields outside of tissue to generate the propagating waves inside the tissue. Methods of use are also described.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: May 18, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Ada Shuk Yan Poon, Alexander Jueshyan Yeh, Yuji Tanabe, John Ho, Sanghoek Kim
  • Patent number: 11005308
    Abstract: Wireless power transfer systems, disclosed, include one or more circuits to facilitate high power transfer at high frequencies. Such wireless power transfer systems include a damping circuit, configured to dampen a wireless power signal such that communications fidelity is upheld at high power. The damping circuit includes at least a damping transistor that is configured to receive, from the transmitter controller, a damping signal for switching the transistor to control damping during transmission of the wireless data signals. Utilizing such systems enables wireless power transfer at high frequency, such as 13.56 MHz, at voltages over 1 Watt, while maintaining fidelity of in-band communications associated with the higher power wireless power signal.
    Type: Grant
    Filed: June 28, 2020
    Date of Patent: May 11, 2021
    Assignee: NuCurrent, Inc.
    Inventors: Alberto Peralta, Pavel Shostak
  • Patent number: 11001156
    Abstract: A method is provided for producing an induction coil, in particular for a charging device for the cableless charging of an electrical energy storage device of an electrically driven motor vehicle. At least one coil wire is placed on a carrier fabric in a conductor loop-type coil pattern. The coil wire is stitched to the carrier fabric via at least one stitching wire.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 11, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Cornelius Johan Kalle Keil, Josef Krammer, Tobias Mueller, Hartmut Koenig, Stefan Opl
  • Patent number: 11005284
    Abstract: An electric power transmission device as one aspect of the present invention comprises: a power transmitter that generates a magnetic field; a storage; and a power transmission controller. The storage stores a first parameter set concerning frequency hopping performed on a first frequency band and a second parameter set concerning frequency hopping performed on a second frequency band. The power transmission controller controls the power transmitter such that the frequency hopping is performed based on the parameter set acquired from the storage. The first frequency band is a band corresponding to a first resolution bandwidth for measuring a leakage magnetic field. The second frequency band is a band corresponding to a second resolution bandwidth intended for a higher band than the first resolution bandwidth.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: May 11, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Koji Ogura
  • Patent number: 11003263
    Abstract: A wireless charging mousepad and processes thereof is provided. The wireless charging mousepad includes an accommodation seat with at least one groove, and a first cloth is disposed on the accommodation seat. Then a coil layer is disposed on the first cloth and placed in the groove with the first cloth. In addition, a glue layer is disposed on the first cloth and covers the groove. At last, a second cloth is disposed on the glue layer. Thereby, the coil layer will be embedded in the accommodation seat, and the wireless charging mousepad is completed.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: May 11, 2021
    Assignee: HADES-GAMING CORPORATION
    Inventor: Hung-Jen Chou
  • Patent number: 11002874
    Abstract: The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. In particular, the apparatus includes a circuit for measuring changes of a mutual impedance between sense coils of a plurality of sense circuits. The described implementations relate to configurations for driving and measurement circuitry for one or more sense circuits that allow for higher accuracy, sensitivity, and temperature stability as needed for detecting smaller objects. Implementations based on mutual impedance sensing allow for improved detection sensitivity e.g., in a presence of strong temperature variations such as may be experienced in an outdoor environment. The apparatus includes a driver circuit, a measurement circuit, and a plurality of sense circuits, each of the plurality of sense circuits including a primary sense coil, a secondary sense coil, and a capacitor connected to each of the primary sense coil and the secondary sense coil.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: May 11, 2021
    Assignee: WiTricity Corporation
    Inventors: Hans Peter Widmer, Lukas Sieber
  • Patent number: 11000066
    Abstract: A power supply unit for an aerosol inhaler includes: a power supply capable of supplying power to a load capable of generating aerosol from an aerosol source; and a charger capable of controlling charging of the power supply, in which the power supply unit further includes: a power reception coil capable of receiving the power in a wireless manner, a converter configured to convert AC power into DC power, an AC conductive wire connecting the power reception coil and the converter, and a DC conductive wire connecting the converter and the charger and having a length equal to or greater than a length of the AC conductive wire.
    Type: Grant
    Filed: November 4, 2020
    Date of Patent: May 11, 2021
    Assignee: JAPAN TOBACCO INC.
    Inventors: Nobuhiro Tatsuta, Hajime Fujita
  • Patent number: 11005292
    Abstract: A wireless power supply device comprises a transmitting coil assembly and a receiving coil assembly. The transmitting coil assembly includes a first ferrite core having a receiving chamber with an opening and a transmitting coil disposed in the receiving chamber of the first ferrite core. The receiving coil assembly is adapted to be moved into the receiving chamber through the opening of the receiving chamber and located at a predetermined position in the receiving chamber. The receiving coil assembly is electromagnetically coupled with the transmitting coil assembly.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: May 11, 2021
    Assignee: Tyco Electronics (Shanghai) Co. Ltd.
    Inventors: Shaoyong Wang, Minjie Chen, Feng Dai, Yuming Song
  • Patent number: 11005293
    Abstract: Systems and techniques are provided for beamforming for wireless power transfer. A phase/amplitude map for a notional field in a plane of an aperture of the second wireless power transfer device may be determined. A Fourier transform may be performed on the phase/amplitude map for the notional field to generate a spatial frequency representation of the notional field. A phase/amplitude map for a second notional field in a plane of an aperture of the first wireless power transfer device may be determined based on the spatial frequency representation of the notional field and the position of the second wireless power transfer device. Control signals for transducer elements of the first wireless power transfer device may be generated based on the determined phase/amplitude map for the second notional field. The control signals for the transducer elements may be supplied to the transducer elements.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: May 11, 2021
    Assignee: uBeam Inc.
    Inventors: Andrew Joyce, Rob Adamson, Dan MacDougall, Kate Latham, Josh Farrell
  • Patent number: 11005303
    Abstract: The present invention relates to a method for detecting foreign material, and an apparatus and a system therefor, and a method for detecting foreign material in a wireless power transmitter, according to one embodiment of the present invention, comprises the steps of: measuring a quality factor value, which corresponds to a reference operation frequency, when an object is sensed; searching for a current peak frequency having a maximum quality factor value within an operation frequency band; receiving, form a wireless power receiver, a foreign material detection state packet including information on a reference peak frequency; correcting the measured quality factor value by using a difference value between the current peak frequency and the reference peak frequency; and determining whether the foreign material exists by comparing the corrected quality factor value with a predetermined quality factor threshold value.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: May 11, 2021
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Jae Hee Park
  • Patent number: 11006498
    Abstract: A UV-C anti-fouling device that is coupled to power source using a single power supply wire. The device is AC powered, and is capacitively coupled to the conductive surface that is being protected, such as the hull of a ship. The device includes a plurality of UV-C LEDs that are either powered during half-cycles of the AC supply, or powered via individual rectifier circuits, such as a diode bridge, or Graetz bridge. A light guide optically extends the light from the UV-C LEDs. The arrangement is robust against shorts and opens, as well as external inflicted damage.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: May 11, 2021
    Assignee: Koninklijke Philips N.V.
    Inventor: Martinus Hermanus Wilhelmus Maria Van Delden
  • Patent number: 10998771
    Abstract: A wireless power transmitter, a power transmission system and a method for driving a wireless power transmitter are disclosed. In an embodiment, a wireless power transmitter includes an inverter, an impedance circuit, an inductance circuit including a first transmission coil and a second transmission coil and a switch circuit, wherein the impedance circuit and the inductance circuit are configured to establish a resonance circuit, wherein the inverter is configured to provide AC power to the resonance circuit, and wherein the switch circuit is configured to couple the first transmission coil and/or the second transmission coil to the impedance circuit to change a resonance frequency of the resonance circuit and to keep a frequency of the AC power within a prescribed range.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: May 4, 2021
    Assignee: TDK ELECTRONICS AG
    Inventors: Hugh Hemphill, Noritaka Chiyo
  • Patent number: 10998767
    Abstract: This power transmission apparatus transmits power to a power reception apparatus by means of a magnetic field resonance system by supplying an output AC voltage (VE) of a class E amplifier to a power-transmission side resonance circuit (TT). Before the transmission of power, the output AC voltage (VE) of the class E amplifier is divided, and a voltage obtained by the division is supplied to the power-transmission side resonance circuit (TT). A current amplitude detection value of a power-transmission side coil (TL) at this time is obtained as an evaluation value, and whether to permit execution of power transmission is controlled on the basis of the evaluation value, through determination as to whether a foreign object is present or not.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: May 4, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Yoshihiro Ikefuji, Takeshi Seike, Yusuke Yoshii
  • Patent number: 10998768
    Abstract: Provided is a resonance converter for a wireless charger, which includes a full bridge inverter connected to an input power source that supplies an input voltage and having first to fourth switches, a resonance tank having a plurality of resonators composed of capacitors and coils connected in series and configured to receive the input voltage from the full bridge inverter and perform voltage conversion in an inductive power transfer manner among the plurality of resonators, and a rectification bridge configured to rectify an output voltage sent from the resonance tank and transfer the rectified output voltage to a battery.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: May 4, 2021
    Assignee: Foundation of Soongsil University-Industry Cooperation
    Inventors: Woojin Choi, Hung Tran Duc
  • Patent number: 10992189
    Abstract: A method, a transmitter, a receiver, and a power management apparatus are provided for wireless charging. The method may include: acquiring, in response to an establishment of a connection from the wireless charging transmitter to a charger, voltage and current capability information of the charger; determining, in response to fast wireless charge identification information received from a wireless charging receiver, acknowledgment information corresponding to the fast wireless charge identification information according to the voltage and current capability information of the charger; sending the acknowledgment information to the wireless charging receiver; and requesting, in response to a charging request including desired voltage information and desired current information received from the wireless charging receiver, the charger for a voltage and a current corresponding to the desired voltage information and the desired current information, respectively.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: April 27, 2021
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventors: Yanteng Wang, Zhijie Li, Hongtu Cui
  • Patent number: 10992347
    Abstract: According to one embodiment, an electronic device includes processor circuitry configured to control a signal detection module to detect a wireless signal of a wireless communication system, and control a power supply module to supply power to a power reception device with electromagnetic waves. When the wireless signal is not detected during a first period, the power is supplied during a second period. When the wireless signal is not detected during a third period different from the first period, the power is supplied during a fourth period different from the second period. A second ratio of the fourth period to the third period is the same as a first ratio of the second period to the first period.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: April 27, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Kentaro Taniguchi
  • Patent number: 10992280
    Abstract: A wireless communication apparatus which comprises: a shared antenna shared for communication and power reception; an impedance matching circuit connected to the shared antenna and having a first switch element; a communication circuit connected to the impedance matching circuit; a second switch element connected to the first switch element; and an impedance matching adjustment circuit configured to switch an on/off state of each of the first switch element and the second switch element at the time of communication and at the time of power reception.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: April 27, 2021
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventor: Yutaka Mimino
  • Patent number: 10992179
    Abstract: A system, recharge apparatus, and method includes transmit coils positioned in a pattern to allow at least one of the transmit coils to establish a wireless link with a receive coil positioned in proximity of the recharge apparatus. A power source is coupled to the transmit coils and configured to selectively energize ones of the transmit coils to transfer power to the receive coil. An energy efficiency detection circuit is configured to detect an electrical response of each one of the transmit coils when energized by the power source, the electrical response indicative of an energy efficiency between the one of the transmit coils and the receive coil. The power source selectively energizes ones of the transmit coils, selected according to a statistical analysis of an historical record and the electrical response indicative of the energy efficiency meeting a minimum efficiency criterion for energy transfer to the receive coil.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: April 27, 2021
    Assignee: NIKE, Inc.
    Inventor: Summer L. Schneider
  • Patent number: 10992183
    Abstract: A high-frequency power supply device includes a power transmission coil, a high-frequency power circuit which converts direct-current power input from a direct-current power supply into high-frequency power and supply the high-frequency power to the power transmission coil, a detection circuit which detects a voltage based on a circuit operation of the high-frequency power circuit and output a detected voltage, a control circuit configured to control a circuit operation of the high-frequency power circuit and to determine a command value used to protect the high-frequency power supply device based on information externally input into a processor, a D/A converter which performs D/A conversion upon receiving the command value output from the control circuit and output a command voltage, and a comparator which compares the command voltage and the detected voltage with each other and output a stop signal used to stop a circuit operation of the high-frequency power supply device.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: April 27, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 10988940
    Abstract: A wireless electrical power transmission system includes a panel having a recessed area for receiving a wireless power transmitter, such as an electric field resonant transmitter. The panel has a first outer surface and a second outer surface opposite the first outer surface, with a thickness defined between the first and second outer surfaces. The recessed area is formed in the first outer surface, and the recessed area has a depth that is less than the thickness of the panel. Electrical wiring is coupled to the wireless power transmitter and passes through an opening formed in the panel, which opening is accessible from the recessed area, and the electrical wiring is in communication with an electrical power source.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: April 27, 2021
    Inventors: Norman R. Byrne, Peter J. Maher, Timothy J. Warwick, Gerald N. Vander Till, Nickolas J. Morrow
  • Patent number: 10992182
    Abstract: Systems and methods for providing power to a load are provided. One system includes a first reactor including a first plurality of coils. A first coil of the first plurality of coils is configured to generate a first magnetic field, and a plurality of second coils of the first plurality of coils are configured to generate a plurality of second magnetic fields that vary an intensity of the first magnetic field. The system further comprises a second reactor comprising a second plurality of coils, wherein the second plurality of coils are configured to tune the first reactor to the load. The first reactor is configured to provide the power to the load, and the second reactor is configured to increase the power provided to the load by increasing an intensity of the second magnetic fields generated by the second coils and tuning the first reactor to the load.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: April 27, 2021
    Inventor: Bonifacio J. Eyales
  • Patent number: 10992159
    Abstract: A method for wireless power transfer adapts to changing configuration of receivers, including changes in number of, location and/or orientiation of, magnetic coupling to, and load of circuits (e.g., battery charging circuits) of one or more receivers. The adaptation can be performed without interrupting optimal or near-optimal power transfer to the receivers, and can provide a measure of fairness among multiple receivers.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: April 27, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Dina Katabi, Lixin Shi, Zachary Edward Kabelac
  • Patent number: 10992181
    Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: April 27, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsu Shijo, Akiko Yamada, Kohei Onizuka, Fumi Moritsuka, Hiroaki Ishihara, Noriaki Oodachi, Shuichi Obayashi, Hiroki Kudo, Kenichirou Ogawa, Shoji Otaka, Hiroki Shoki
  • Patent number: 10985617
    Abstract: A method includes receiving an indication that a wireless-power receiver is located within one meter of a wireless-power transmission system and is authorized to receive wirelessly-delivered power from a wireless-power transmission system. The method includes, in response to receiving the indication, selecting a power level at which to amplify a radio frequency (RF) signal using a power amplifier (PA). In accordance with a determination that transmitting the RF signal to the wireless-power receiver would satisfy safety thresholds, the method includes instructing the PA to amplify the RF signal using the power level to create an amplified RF signal, and providing the amplified RF signal to the one or more antennas. The one or more antennas are caused to, upon receiving the amplified RF signal, radiate RF energy that is focused within an operating area that includes the wireless-power receiver while forgoing any active beamforming control.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: April 20, 2021
    Assignee: ENERGOUS CORPORATION
    Inventors: Cesar A. Johnston, Erik Heinke, Daniel P. Lawless
  • Patent number: 10985616
    Abstract: A method for transmitting power includes providing power using a contactless power transfer from a transmitter to a receiver that is mutually coupled with the transmitter. The method also includes managing and regulating the contactless power transfer being provided, where the managing and regulating are integrally and autonomously performed by the transmitter.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: April 20, 2021
    Assignee: STMICROELECTRONICS (GRAND OUEST) SAS
    Inventor: Lionel Cimaz
  • Patent number: 10980689
    Abstract: A patient support apparatus includes a frame, a patient support surface, one or more force sensors that detect weight on the patient support surface, a recharger, and a controller. The recharger is adapted to recharge a personal electronic device of the patient's. The controller controls power supplied to the recharger based on outputs from the force sensors. Additionally or alternatively, a barrier is provided having a coil therein. The recharger includes a magnet for magnetically coupling to the barrier, and the recharger wirelessly receives power from the coil when the recharger is magnetically coupled to the barrier. Alternatively, the magnet holds a personal electronic device that receives power wirelessly from a coil inside the barrier. In still another variation, a pendant is included for controlling movement of the patient support apparatus and the pendant includes a recharger adapted to recharge a personal electronic device.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: April 20, 2021
    Assignee: Stryker Corporation
    Inventors: Krishna Sandeep Bhimavarapu, Kurosh Nahavandi, Anish Paul, Cory Patrick Herbst, Jonathan Mark Greenbank, Christopher Matthew Reget
  • Patent number: 10984946
    Abstract: Systems and methods are described that reduce magnetic flux density proximate to a wireless charging pad, such as a WEVC pad. These systems and methods control peak magnetic flux density in air around a WEVC pad to reduce potentially dangerous heat produced in foreign metal objects affected by a magnetic field generated by a coil of the WEVC pad. Controlling the peak magnetic flux density results in a safer WEVC pad. Aspects include ferrite tiles being separated by gaps having predefined sizes to increase a magnetic reluctance of a path of the magnetic flux through the ferrite tiles, which reduces a peak magnetic flux density experienced in areas proximate to the coil. In addition, the ferrite tiles can be arranged such that a combination of gaps are aligned with a region overlapping the coil.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: April 20, 2021
    Assignee: WiTricity Corporation
    Inventors: Leandro Percebon, Daniel Kuerschner, Mickel Bipin Budhia
  • Patent number: 10985613
    Abstract: A power transmitter (101) of a wireless power transfer system comprises a resonance including a transmitter coil (103) for generating a power transfer signal for wirelessly transferring power to a power receiver (105). Further, a driver (1303) generates a drive signal for the resonance circuit (201) and a message receiver (1305) is arranged to receive messages from the power receiver (105). A power loop controller (1307) implements a power control loop by adapting the power of the drive signal in response to power control messages received from the power receiver (105). However, the regulation is subject to a constraint of at least one of a current or voltage of the resonance circuit and a power of the drive signal being below a maximum limit. Further, the power transmitter (101) comprises an adapter (1309) which adapts the maximum limit in response to a load indication indicative of a loading of the power transfer signal by the power receiver (105).
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: April 20, 2021
    Assignee: Koninklijke Philips N.V.
    Inventors: Antonius Adriaan Maria Staring, Andries Van Wageningen
  • Patent number: 10978919
    Abstract: An electric power transmission device as an aspect of the present invention includes a plurality of power transmitters configured to respectively generate magnetic fields. Phases of the respective magnetic fields are set such that the respective magnetic fields cancel out each other. The power transmitters sequentially shift frequencies of the respective magnetic fields to the same value at the same timing. A shift width of each of the frequencies for one-time shifting is limited by an upper limit value.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: April 13, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koji Ogura, Tetsu Shijo, Masatoshi Suzuki
  • Patent number: 10978917
    Abstract: A converter (200) for converting a received radio frequency signal into a DC signal for powering a load (300). The converter (200) comprises a first rectifying arm (207) for generating a DC signal based on a first RF voltage input obtained from the received RF signal. A second rectifying arm (209) generates a DC signal based on a second RF voltage input obtained from the received RF signal. The received RF signal provides the voltage difference between the first RF voltage input and the second RF voltage input.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: April 13, 2021
    Assignee: Drayson Technologies (Europe) Limited
    Inventors: Vitor Freitas, Bruno Franciscatto
  • Patent number: 10979102
    Abstract: An electronic device is arranged to receive near-field communication signals and comprises: first and second antenna connection terminals and a variable shunt resistance connected between the first and second antenna connection terminals. The device further comprises a peak detector arranged to detect an amplitude of an incoming near-field communication signal across the antenna connection terminals and to produce a peak signal (Vpd) dependent on the amplitude and a comparator arranged to produce an error signal, wherein the error signal is dependent on a difference between the peak signal and a reference signal (Vrefpeak). The device also comprises an integral controller which is arranged to vary the shunt resistance in response to an integral of the error signal. Said configuration is employed for regulating the received voltage and reducing voltage swing.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: April 13, 2021
    Assignee: Nordic Semiconductor ASA
    Inventor: Shankkar Balasubramanian
  • Patent number: 10978900
    Abstract: Provided is an auxiliary battery capable of transmitting and receiving wireless power. The auxiliary battery capable of transmitting and receiving wireless power according to an embodiment of the present invention comprises: a battery; a wireless power transfer antenna which functions as an antenna for transmitting or receiving wireless power and is provided as a single antenna; and a circuit unit for controlling an operation of the wireless power transfer antenna, wherein the single antenna receives wireless power supplied from an external source so as to charge the battery, or wirelessly transmits power stored in the battery so as to charge a battery of the charge target.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: April 13, 2021
    Assignee: AMOSENSE CO., LTD
    Inventors: Jun Ho Park, Jin Pyo Park, Bae Geun Lee