公开(公告)号：US20210280365A1

公开(公告)日：2021-09-09

申请号：US17189788

申请日：2021-03-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  Korea Advanced Institute of Science and Technology

Inventor： Jang Yeol KIM ,  In Kui CHO ,  HYUNJOON LEE ,  Sang-Won KIM ,  Seong-Min KIM ,  Jung Ick MOON ,  Woo Cheon PARK ,  Je Hoon YUN ,  Jaewoo LEE ,  Ho Jin LEE ,  Dong Won JANG ,  Kibeom KIM ,  Seungyoung AHN

IPC: H01F27/32 ,  H01F27/24 ,  H01F41/04 ,  H01F27/28 ,  G01R33/02

Abstract: A radio frequency (RF) weak magnetic field detection sensor includes a ferromagnetic core, a pickup coil disposed to surround the ferromagnetic core, a substrate that includes an opening, a core pad connected to the ferromagnetic core and a coil pad connected to the pickup coil, and an insulating tube interposed between the ferromagnetic core and the pickup coil. The insulating tube includes a bobbin around which the pickup coil is wound, and a core hole formed to pass through the bobbin and configured to accommodate the ferromagnetic core.

公开(公告)号：US20190334379A1

公开(公告)日：2019-10-31

申请号：US16163359

申请日：2018-10-17

Applicant: Electronics and Telecommunications Research Institute

Inventor： SANG HAN LEE ,  In Kui CHO ,  Sang-Won KIM ,  Seong-Min KIM ,  Jung Ick MOON ,  Ho Jin LEE

IPC: H02J50/12 ,  H02J5/00 ,  H02J50/80

Abstract: A receiver of a wireless power transmission system may include a capacitor-and-inductor configured to receive power from a transmitter using a resonance, at least one capacitor configured to connect to an output node of the receiver, and a plurality of switches configured to control current flow within the receiver. The plurality of switches may be controlled so that the capacitor-and-inductor may be disconnected from the at least one capacitor and the output node at preset periods. Current resonating in the capacitor-and-inductor may increase during disconnection between the at least one capacitor and the output node. The plurality of switches may output the increased current to the battery by connecting the capacitor-and-inductor to the capacitor and the output node after the period, connect at least one capacitor and the output node in series after the period, and operate to reduce root mean square (RMS) current within the receiver.

公开(公告)号：US20180235112A1

公开(公告)日：2018-08-16

申请号：US15599908

申请日：2017-05-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Byung Chan KIM ,  Sang-Won KIM ,  Seong-Min KIM ,  Jung Ick MOON ,  Sang Bong JEON ,  In Kui CHO ,  Hyung Do CHOI

IPC: H05K9/00 ,  G01R33/025

CPC classification number: G01R33/025 ,  H01F27/365 ,  H02J7/0042 ,  H02J7/025 ,  H02J50/10 ,  H02J50/70 ,  H04R2209/022

Abstract: Disclosed is a magnetic field shielding apparatus including an energy transmitter configured to generate a magnetic field, an energy receiver configured to receive the magnetic field generated by the energy transmitter, and a magnetic shield configured to shield a leaked magnetic field that is not received by the energy receiver, the magnetic shield including at least one closed region through which the leaked magnetic field passes, and at least one open region including a protrusion through which the leaked magnetic field moves to an inside of the magnetic field shielding apparatus after absorbed into the closed region.

公开(公告)号：US20180152049A1

公开(公告)日：2018-05-31

申请号：US15428283

申请日：2017-02-09

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sang Bong JEON ,  Jung Ick MOON ,  Sang-Won KIM ,  Seong-Min KIM ,  In Kui CHO ,  Jong Hwa KWON ,  Byung Chan KIM ,  Hyung Do CHOI

IPC: H02J50/12 ,  H02J7/02 ,  H02J50/90

Abstract: Provided is an apparatus for reducing an electromagnetic wave in a wireless power transmitter using a reducing coil, the apparatus that may cancel external emission of a magnetic field formed at a transmission coil using the reducing coil based on induced electromotive force.