公开(公告)号：US20240047989A1

公开(公告)日：2024-02-08

申请号：US18229464

申请日：2023-08-02

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Tomio HIGO

IPC: H02J7/00 ,  H02J50/10 ,  H02J50/60

CPC classification number: H02J7/007192 ,  H02J50/10 ,  H02J50/60

Abstract: A power receiving device includes: a placement portion; a power feeder including a coil; a thermal conduction member disposed at a location that is located between the power receiving device and the coil control of stopping power feeding by the power feeder a processor to perform control of stopping power feeding by the power feeder in a case where after start of power feeding by the power feeder at a predetermined timing, temperature of the thermal conduction member detected by the sensor satisfies a predetermined condition. the power receiving device is placed on the placement surface and having a higher thermal conductivity than the placement portion; a sensor to detect temperature of the thermal conduction member; and a processor to perform control of stopping power feeding by the power feeder in a case where, temperature of the thermal conduction member detected by the sensor satisfies a predetermined condition.

公开(公告)号：US20240039341A1

公开(公告)日：2024-02-01

申请号：US18484885

申请日：2023-10-11

Applicant: Apple Inc.

Inventor： Adam L. Schwartz ,  Niloofar Rashidi Mehrabadi ,  Hossein Sepahvand

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/70 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/12 ,  H02J50/70 ,  H02J50/80

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device. The wireless power transmitting device determines whether an external object is present. The external object may be a foreign object such as a coin or paperclip or may be a wireless power receiving device. External objects are detected using quality-factor measurements. Wireless communications are used to discriminate between foreign objects and wireless power receiving devices. Quality factor measurements may be compensated for aging and temperature effects using temperature measurements and compensation factors based on frequency and measured resistance.

公开(公告)号：US11888337B2

公开(公告)日：2024-01-30

申请号：US17109269

申请日：2020-12-02

Applicant: PHILIPS IP VENTURES B.V.

Inventor： David W. Baarman ,  Joshua K. Schwannecke ,  Neil W. Kuyvenhoven ,  Esai E. Umenei ,  Dale R. Liff ,  Andrew C. Zeik ,  Mark A. Blaha ,  Jason L. Amistadi ,  Robert D Gruich

IPC: G01R21/00 ,  G01V3/02 ,  H01F38/14 ,  H02J50/12 ,  H02J50/60 ,  H02J7/00 ,  H02J50/70 ,  H02J50/90

CPC classification number: H02J7/0047 ,  G01R21/00 ,  G01V3/02 ,  H01F38/14 ,  H02J50/12 ,  H02J50/60 ,  H02J50/70 ,  H02J50/90

Abstract: A system and method of controlling inductive power transfer in an inductive power transfer system and a method for designing an inductive power transfer system with power accounting. The method of controlling inductive power transfer including measuring a characteristic of input power, a characteristic of power in the tank circuit, and receiving information from a secondary device. Estimating power consumption based on the measured characteristic of tank circuit power and received information and comparing the measured characteristic of input power, the information from the secondary device, and the estimated power consumption to determine there is an unacceptable power loss. The method for designing an inductive power transfer system with power accounting including changing the distance between a primary side and a secondary side and changing a load of the secondary side. For each distance between the primary side and the secondary side and for each load, measuring a circuit parameter on the primary side in the tank circuit and a circuit parameter on the secondary side during the transfer of contactless energy. The method further including selecting a formula to describe power consumption in the system during the transfer of contactless energy based on coefficients and the circuit parameters, and determining the coefficients using the measured circuit parameters.

公开(公告)号：US11881723B2

公开(公告)日：2024-01-23

申请号：US17942669

申请日：2022-09-12

Applicant: NuCurrent, Inc.

Inventor： Mark Melone ,  Alberto Peralta ,  Michael Katz

IPC: H02J50/40 ,  H02J50/20 ,  A47J47/01 ,  A47J27/00 ,  H05B6/12 ,  H02J50/60

CPC classification number: H02J50/40 ,  A47J27/004 ,  A47J47/01 ,  H02J50/20 ,  H05B6/1236 ,  H02J50/60

Abstract: A kitchen appliance is disclosed includes a first electrical component, a second electrical component, and a wireless power receiver system. The wireless power receiver system includes a first receiver antenna configured to couple with a first transmission antenna and receive virtual AC power signals from the first transmission antenna. A second receiver antenna is configured to couple with a second transmission antenna and receive virtual DC power signals from the second transmitter antenna. A first receiver power conditioning system is configured to receive the virtual AC power signals, convert the virtual AC power signals to AC received power signals, and provide the AC received power signals to power the first electrical component. The second receiver power conditioning system configured to receive the virtual DC power signals, convert the virtual DC power signals to DC received power signals, and provide the DC received power signals to power the second electrical component.

公开(公告)号：US11881719B2

公开(公告)日：2024-01-23

申请号：US17020537

申请日：2020-09-14

Applicant: Spark Connected LLC

Inventor： Petru Emanuel Stingu ,  Kenneth Moore ,  Yulong Hou ,  Ruwanga Dassanayake

IPC: H02J50/12 ,  H02M3/158 ,  H02J50/80 ,  H02J50/10 ,  H02J50/00 ,  A47B21/06 ,  G06F1/18 ,  H02J50/60 ,  G01R33/00 ,  G01R33/02 ,  G01R33/07 ,  G01R33/10

CPC classification number: H02J50/12 ,  A47B21/06 ,  G01R33/0094 ,  G01R33/0206 ,  G01R33/07 ,  G01R33/10 ,  G06F1/189 ,  H02J50/005 ,  H02J50/10 ,  H02J50/60 ,  H02J50/80 ,  H02M3/1582 ,  A47B2021/066 ,  A47B2200/008

Abstract: In an embodiment, a method includes: wirelessly transmitting power using a transmitter LC tank; wirelessly receiving power from the transmitter LC tank using a receiver LC tank; interrupting wirelessly transmitting power for a slot period; during the slot period, shorting the receiver LC tank; during the slot period and after shorting the receiver LC tank, measuring a transmitter signal associated with the transmitter LC tank; determining a power loss associated with the wirelessly transmitting power based on the measured transmitter signal; and detecting a metallic object based on the determined power loss.

公开(公告)号：US11876387B2

公开(公告)日：2024-01-16

申请号：US17966563

申请日：2022-10-14

Applicant: NuCurrent, Inc.

Inventor： Jason Green ,  Andrew Kovacs ,  Mark Melone ,  Md Nazmul Alam

IPC: H02J50/80 ,  H02J50/12 ,  H02J50/70 ,  H01F27/24 ,  H01F38/14 ,  H01F27/36 ,  H02J50/60

CPC classification number: H02J50/80 ,  H01F27/24 ,  H01F27/36 ,  H01F38/14 ,  H02J50/12 ,  H02J50/70 ,  H02J50/60

Abstract: A power transmitter for wireless power transfer includes a control and communications unit configured to provide power control signals to a power supply external to the power transmitter for controlling a power level of a power signal configured for transmission to a power receiver, the power supply configured to configure a direct current (DC) power based on the power control signals. The power transmitter further includes an inverter circuit configured to receive the DC power from the power supply external to the power transmitter and convert the input power to a power signal. The power transmitter further includes a coil formed of wound Litz wire and including at least one layer, the coil defining, at least, a top face and shielding comprising a ferrite core and defining a cavity, the cavity configured such that the ferrite core substantially surrounds all but the top face of the coil.

公开(公告)号：US20240006926A1

公开(公告)日：2024-01-04

申请号：US18356028

申请日：2023-07-20

Applicant: LG INNOTEK CO., LTD.

Inventor： Jae Hee PARK ,  Yong Il KWON

IPC: H02J50/60 ,  G01R27/26 ,  H02J13/00 ,  H02J50/12 ,  H02J7/02 ,  H02J3/02 ,  H02J7/00 ,  G01N27/02

CPC classification number: H02J50/60 ,  G01R27/26 ,  H02J13/00001 ,  H02J50/12 ,  H02J7/00045 ,  H02J3/02 ,  H02J7/00308 ,  G01N27/02 ,  H02J7/02

Abstract: A wireless power transmitter that transmits power to a wireless power receiver, the wireless power transmitter including a communication unit configured to communicate with the wireless power receiver; and a controller, wherein the communication unit receives a plurality of packets including a foreign object detection (FOD) status packet from the wireless power receiver, wherein the controller determines whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet, wherein the communication unit transmits, to the wireless power receiver, a response signal indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, and wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a configuration packet, an identification packet for transmitting receiver identification information, an extended identification packet, a general request packet, a special request packet, a control error packet, a renegotiation packet, a 24-bit received power packet, an eight-bit received power packet, and a charging status packet.

公开(公告)号：US20240006924A1

公开(公告)日：2024-01-04

申请号：US18465493

申请日：2023-09-12

Applicant: Apple Inc.

Inventor： Liang Chen

IPC: H02J50/12 ,  H02J50/60 ,  H02J7/00 ,  H02J50/05

CPC classification number: H02J50/12 ,  H02J50/60 ,  H02J7/0029 ,  H02J50/05

Abstract: An inductive power transmitter comprising: a converter configured to generate at least two object detection signals at substantially different frequencies, at least one transmitting coil configured to generate a magnetic field based on the object detection signals, and a controller configured to determine or measure circuit parameter(s) in relation to the coil to determine the inductance of the coil at each of the frequencies, and determine whether and/or what kind of object is present depending on a change in inductance between each of the frequencies.

公开(公告)号：US11862992B2

公开(公告)日：2024-01-02

申请号：US17979525

申请日：2022-11-02

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Masakazu Kato

IPC: H02J50/60 ,  G01R19/165 ,  H02J50/10

CPC classification number: H02J50/60 ,  G01R19/16538 ,  H02J50/10

Abstract: According to an embodiment, a power transmission device performs power transmission without contact with a power reception device. A control circuit of the power transmission device obtains, as a reference value, a standby current in a standby state in which the power transmission to the power reception device is not performed. The control circuit sets, as a foreign matter detection threshold, a value obtained by adding a constant value to the reference value or a value obtained by adding a constant ratio to the reference value. Further, in the standby state, when the current value input to the power transmission circuit and detected by the current detection circuit is equal to or larger than the threshold, the control circuit determines that there is a foreign matter on the power transmission coil.

公开(公告)号：US20230420996A1

公开(公告)日：2023-12-28

申请号：US18342332

申请日：2023-06-27

Applicant: Energous Corporation

Inventor： Cesar A. Johnston ,  Sean Nicolson ,  Aras Pirbadian ,  Deepak Jain ,  Howard Chan ,  Erik Heinke ,  Mehdi Khanpour

IPC: H02J50/60 ,  G01K7/22 ,  H02J50/20

CPC classification number: H02J50/60 ,  G01K7/22 ,  H02J50/20 ,  H02J2310/62

Abstract: A wireless power transmitting system includes a power amplifier comprising a plurality of measurement points and a power amplifier controller integrated circuit (IC). In some embodiments, the power amplifier controller IC performs synchronization of the various components of the power amplifier, conducts impedance and temperature measurements at the measurements points, determines if a foreign object is within the transmission range of the wireless power transmitter, and decides if a shutdown of the power amplifier is needed. In some embodiments, the power amplifier controller IC determines through a transmitter controller IC, the presence of a foreign object within the transmission range and adjusts the power transmission to one or more receivers.