公开(公告)号：US12199450B2

公开(公告)日：2025-01-14

申请号：US18058688

申请日：2022-11-23

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Ju Park ,  Yong Seok Lim ,  Yong Seong Kim ,  Hae Yong Jung ,  Hye Jung Kim

IPC: G01C3/08 ,  G01V8/18 ,  H02J50/12 ,  H02J50/60

Abstract: A system for foreign object detection (FOD) in wireless power transfer is proposed. The system may include a balanced coil which is disposed between a transmitter coil and a receiver coil and which includes a Maxwell bridge circuit. The system may also include a temperature sensor configured to measure a temperature of the transmitter coil. The system may further include a processor configured to determine whether an FO is present between the transmitter coil and the receiver coil on the basis of voltage values detected at both ends of the bridge circuit. The FOD system can recognize the FO by finding a maximum resonant frequency at which a metal reacts using resonant frequency sweeping in a bridge circuit.

公开(公告)号：US20230387725A1

公开(公告)日：2023-11-30

申请号：US18058688

申请日：2022-11-23

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Ju Park ,  Yong Seok Lim ,  Yong Seong Kim ,  Hae Yong Jung ,  Hye Jung Kim

IPC: H02J50/60 ,  H02J50/12 ,  G01V8/18

CPC classification number: H02J50/60 ,  H02J50/12 ,  G01V8/18

Abstract: A system for foreign object detection (FOD) in wireless power transfer is proposed. The system may include a balanced coil which is disposed between a transmitter coil and a receiver coil and which includes a Maxwell bridge circuit. The system may also include a temperature sensor configured to measure a temperature of the transmitter coil. The system may further include a processor configured to determine whether an FO is present between the transmitter coil and the receiver coil on the basis of voltage values detected at both ends of the bridge circuit. The FOD system can recognize the FO by finding a maximum resonant frequency at which a metal reacts using resonant frequency sweeping in a bridge circuit.

公开(公告)号：US12022444B2

公开(公告)日：2024-06-25

申请号：US17468563

申请日：2021-09-07

Applicant: Korea Electronics Technology Institute

Inventor： Yong Ju Park ,  Yong Seok Lim

IPC: H04W72/0446 ,  H02J50/20 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H04B7/06 ,  H04W74/04

CPC classification number: H04W72/0446 ,  H02J50/20 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H04B7/0617 ,  H04W74/04

Abstract: Provided is a power transmission and reception system and a power transmission and reception system method capable of simultaneously transmitting/receiving data and power and including an array antenna including a plurality of antennas, a radio frequency (RF) unit and a baseband unit provided for data transmission and reception, a slot allocation unit configured to allocate a channel for power transfer and a slot for data transmission in a Contention Access Period (CAP) section, and allocate a slot for power transfer in consideration of whether to perform cooperative charging with a nearby another Simultaneous Wireless Information and Power Transfer (SWIPT) power transfer system, and a power supply and beamforming control unit configured to adjust the array antenna such that a power signal to be transmitted is beamformed according to a positioning beacon from a power receiving unit (PRU).