公开(公告)号：US20180337557A1

公开(公告)日：2018-11-22

申请号：US15967285

申请日：2018-04-30

Applicant: Apple Inc.

Inventor： Liang Chen ,  Andrew Gray ,  Arunim Kumar ,  Zachary Strachan Harris ,  Antoin J. Russell ,  Bharat K. Patel

IPC: H02J50/12 ,  G01R31/28 ,  G08B1/08 ,  H02J50/40 ,  H02J7/02 ,  H02J50/60

CPC classification number: H02J50/12 ,  G01R31/28 ,  G08B1/08 ,  H02J7/025 ,  H02J50/40 ,  H02J50/60

Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using output circuitry that includes an array of wireless power transmitting coils that form a wireless charging surface. During wireless power transmission operations, wireless power signals are transmitted from the array of coils to a wireless power receiving device on the charging surface. Inductance measurement circuitry such as impulse response measurement circuitry and other measurement circuitry is coupled to the output circuitry. Control circuitry in the wireless power transmitting device analyzes signals from the measurement circuitry to produce two-dimensional signal profiles across the wireless charging surface and to compare patterns in these signal profiles to predetermined signal patterns associated with the presence of known power receiving equipment on the wireless charging surface. Based on the analysis, charging parameters may be adjusted or other actions taken.

公开(公告)号：US20180331581A1

公开(公告)日：2018-11-15

申请号：US16024636

申请日：2018-06-29

Applicant: Energous Corporation

Inventor： Alister Hosseini

IPC: H02J50/20 ,  H02J7/02 ,  H04W4/80 ,  H04B5/00

CPC classification number: H02J50/20 ,  H02J7/025 ,  H02J50/23 ,  H02J50/40 ,  H04B5/0037 ,  H04W4/80 ,  Y02B40/90

Abstract: A near-field antenna is provided, which includes: a reflector and four distinct antenna elements, offset from the reflector, each of the four distinct antenna elements following respective meandering patterns. Two antenna elements of the four antenna elements form a first dipole antenna along a first axis, and another two antenna elements of the four antenna elements form a second dipole antenna along a second axis perpendicular to the first axis. The near-field antenna further includes: (i) a power amplifier configured to feed electromagnetic signals to one of the dipole antennas, (ii) an impedance-adjusting component configured to adjust an impedance of one of the dipole antennas, and (iii) switch circuitry coupled to the power amplifier, the impedance-adjusting component, and the dipole antennas. The switch circuitry is configured to switchably couple the first dipole antenna to the power amplifier and the second dipole antenna to the impedance-adjusting component, and vice versa.

公开(公告)号：US20180323659A1

公开(公告)日：2018-11-08

申请号：US15967912

申请日：2018-05-01

Applicant: Sanjaya Maniktala

Inventor： Sanjaya Maniktala

IPC: H02J50/60 ,  H02J50/10 ,  G01V3/10

CPC classification number: H02J50/60 ,  G01V3/104 ,  H02J7/025 ,  H02J50/10 ,  H02J50/12

Abstract: In one embodiment, a wireless power transfer system comprises a transmitter coil structure comprising a first transmitter coil, and a second transmitter coil coupled to the first transmitter coil in such a way that when a first current flows in the first transmitter coil in a first spatial direction the first current flows in the second transmitter coil in a second spatial direction different from the first spatial direction, a foreign object sensor coil structure comprising a first sensor coil having a central axis in common with the first transmitter coil, and a second sensor coil coupled in series to the first sensor coil, the second sensor coil having a central axis in common with the second transmitter coil, the first sensor coil coupled to the second sensor coil in such a way that when a first voltage induced in the first sensor coil has a first polarity a second voltage induced in the second sensor coil has a second polarity different from the first polarity, a voltage detector coupled to the foreign object sensor coil structure, the voltage detector configured to detect a net voltage across the foreign object sensor coil structure, and a controller configured to receive the net voltage and determine a presence or absence of a foreign object based on a magnitude of the net voltage.

公开(公告)号：US20180323655A1

公开(公告)日：2018-11-08

申请号：US16039002

申请日：2018-07-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tatsuya HOSOTANI

IPC: H02J50/12 ,  H01F27/28 ,  H02J7/02

CPC classification number: H02J50/12 ,  H01F27/28 ,  H01F38/14 ,  H02J7/025 ,  H02J50/50

Abstract: A power transmission circuit is connected to a power transmission coil having a coil aperture. The power transmission circuit includes a conductive or magnetic power-transmission-coil near member opposed to the coil aperture of the power transmission coil, and a repeating coil arranged on a side opposite to a side on which the power-transmission-coil near member is arranged with respect to the power transmission coil and coupled to the power transmission coil at least via a magnetic field. When a shortest distance between the power transmission coil and the power-transmission-coil near member is expressed as (dt1) and a shortest distance between the power transmission coil and the repeating coil is expressed as (dt2), dt2≤dt1.

公开(公告)号：US20180323653A1

公开(公告)日：2018-11-08

申请号：US16036391

申请日：2018-07-16

Applicant: The University of Hong Kong

Inventor： SHU YUEN RON HUI ,  CHENG ZHANG

IPC: H02J50/12 ,  H02J7/02 ,  H02J50/05

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02J50/05

Abstract: Devices and systems of inductive-capacitive (LC) coil-resonators that can be embedded easily inside high-voltage insulation discs are provided. Each LC coil-resonator comprises spiral conductive tracks fabricated or printed in the form of at least two layers of planar spiral windings on electrically non-conductive materials. The planar conductive windings on at least two parallel layers may be connected to form a closed winding. The distributed inductance associated with the planar spiral windings and the distributed capacitance between the layers of the conductive tracks form an equivalent LC coil-resonator. When these LC coil-resonators are embedded in some or all of the insulation discs in a high-voltage insulation rod, they form the relay coil-resonators for wireless power transfer.

公开(公告)号：US20180323634A1

公开(公告)日：2018-11-08

申请号：US15773646

申请日：2016-08-23

Applicant: LG INNOTEK CO., LTD.

Inventor： Yun Bok LEE

IPC: H02J7/02 ,  H01F27/29 ,  H02J50/12

CPC classification number: H02J7/025 ,  H01F27/29 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12

Abstract: The present invention relates to a multi-coil wireless charging method and a device and a system therefor, a wireless power transmitter for wirelessly transmitting power to a wireless power receiver, according to one embodiment of the present invention, comprising: a power transmission unit which comprises at least two or more transmission coils; a control unit which controls so that a primary detection signal for detecting the existence of a wireless power receiver is simultaneously transmitted by using frequencies that are different from each other that were allocated to each of the transmission coils in advance; and a demodulation unit which, if a first signal strength indicator associated with the primary detection signal is received from the wireless power receiver, transmits, to the control unit, the received first signal strength indicator and a preset transmission coil identifier for identifying the transmission coil through which the first signal strength indicator was received, wherein the control unit may control so that a secondary detection signal is transmitted through the transmission coil through which the first signal strength indicator was received. Thus, the present invention has a merit of enabling a quicker and more accurate detection of a wireless power receiver.

公开(公告)号：US20180323511A1

公开(公告)日：2018-11-08

申请号：US15587131

申请日：2017-05-04

Applicant: Elwha LLC

Inventor： Yaroslav A. Urzhumov

IPC: H01Q15/00 ,  H01Q15/14 ,  H01Q15/10 ,  H01Q21/06

CPC classification number: H01Q15/00 ,  H01Q1/2225 ,  H01Q1/273 ,  H01Q3/2605 ,  H01Q3/44 ,  H01Q15/0086 ,  H01Q15/10 ,  H01Q15/141 ,  H01Q21/06 ,  H01Q21/061 ,  H02J7/025 ,  H02J50/12 ,  H02J50/23 ,  H02J50/80 ,  H02J2007/0098

Abstract: This disclosure provides systems and methods relating to medical devices that utilize dynamically tunable antennas comprising a plurality of sub-wavelength antenna elements. In various embodiments, impedance elements associated with the sub-wavelength antenna elements are dynamically tuned to control radiation patterns of a tunable antenna, such as a metamaterial surface antenna technology (MSA-T) antenna. The radiation patterns produced by the tunable antenna are used, for example, for sending a control signal to an implanted medical device, directly controlling the movement of a medical device, causing a medical device to perform a specific function, powering a medical device, and/or otherwise interacting a medical device. In some embodiments, the implanted medical device may also include an antenna, such as an MSA-T antenna, for receiving and/or sending beam-formed electromagnetic radiation.

公开(公告)号：US20180316339A1

公开(公告)日：2018-11-01

申请号：US15498385

申请日：2017-04-26

Applicant: Texas Instruments Incorporated

Inventor： Jingwei Xu ,  Vijayalakshmi Devarajan ,  Gangqiang Zhang ,  Angelo William Pereira

IPC: H03K5/1536 ,  H03K5/15 ,  H03K17/687 ,  H02J7/02 ,  H02J50/10

CPC classification number: H03K5/1536 ,  H02J7/025 ,  H02J50/10 ,  H02J2007/105 ,  H03K5/1508 ,  H03K17/687

Abstract: Methods and apparatus for detecting zero-volt crossing in a field-effect transistor. A comparator compares a drain-to source voltage of the transistor to a threshold voltage. A gate voltage signal of the transistor is provided to a clock input of the comparator such that said gate voltage signal is used to latch a result of said comparison to an output of the comparator. A control function with respect to the transistor is performed based on the value of the comparator output.

公开(公告)号：US20180316228A1

公开(公告)日：2018-11-01

申请号：US16029444

申请日：2018-07-06

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Abdullah AHMED ,  Gareth Pryce WEALE

IPC: H02J50/12

CPC classification number: H02J50/12 ,  H02J7/025

Abstract: A wireless power transmission (WPT) system. Implementations may include a power source coupled with a first wireless power transmission (WPT) system and a load coupled with a second WPT system including a sense circuit. The second WPT system, using the sense circuit, may be configured to dynamically tune a resonance of the second WPT system with the first WPT system to a desired resonance frequency value to allow transfer of a desired voltage or a desired power to the load. The desired resonance frequency value may be less than a maximum possible resonance frequency value. The first WPT system may be capable of transmitting more voltage or more power than the second WPT system or the load can receive without inducing damage to the second WPT system or the load.

公开(公告)号：US20180313697A1

公开(公告)日：2018-11-01

申请号：US15769255

申请日：2016-10-19

Applicant: NOVENA TEC INC.

Inventor： Rommel MONTES ,  Ravi THIRUN ,  Rajan THIRU

IPC: G01K1/10 ,  G01K1/02 ,  H01L21/67 ,  H01L21/683 ,  H02J7/02

CPC classification number: G01D21/00 ,  G01K1/14 ,  G01K2007/422 ,  H01L21/67253 ,  H02J7/025 ,  H02J50/10

Abstract: A process chamber measurement wafer for location inside a process chamber and measuring environmental conditions within the process chamber during a process run. The process chamber measurement wafer including a releasable dummy wafer to protect the instrumented portion of the process chamber measurement wafer from process material deposited during the process run.