公开(公告)号：US20200083756A1

公开(公告)日：2020-03-12

申请号：US16566595

申请日：2019-09-10

Applicant: Korea Advanced Institute of Science and Technology ,  University-Industry Cooperation Group of Kyung Hee University

Inventor： Seungyoung AHN ,  Jaehyoung PARK ,  Bomson LEE ,  Hongkyun KIM

IPC: H02J50/70 ,  H02J50/12 ,  H02J50/40 ,  H05K9/00 ,  G01R33/02

Abstract: A leakage magnetic field shielding device includes: a leakage magnetic field determining unit for determining phase and magnitude of a leakage magnetic field based on information obtained from a power supply device and a current collector device; a shielding current controller for determining a shielding current based on the phase and magnitude of the leakage magnetic field and supplying the determined shielding current to the leakage magnetic field shielding device; and a shielding unit for shielding the leakage magnetic field by generating a shielding magnetic field in accordance with the supply of the shielding current. The shielding unit has a multiple resonance characteristic depending on an arrangement of capacitors and coils and is disposed to surround the power supply device or the current collector device. The shielding magnetic field has resonance frequencies canceling magnetic fields corresponding to fundamental frequency and multiple frequency of the leakage magnetic field.

公开(公告)号：US20250044328A1

公开(公告)日：2025-02-06

申请号：US18745692

申请日：2024-06-17

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Chul KIM ,  Yechan PARK ,  Jaeouk CHO ,  Hongkyun KIM ,  Seong Jae MOON

IPC: G01R19/17 ,  G01R19/175 ,  G01R19/25

Abstract: A zero current detection device is proposed. The device may include a scaling circuit unit configured to generate a first voltage which is scaled from a target voltage. The device may also include a mirroring circuit unit configured to generate a mirroring current when the first voltage is higher than or equal to a reference voltage. The device may further include a comparator circuit unit configured to compare the target voltage and a ground voltage when the mirroring current is input.

公开(公告)号：US20230261525A1

公开(公告)日：2023-08-17

申请号：US17673164

申请日：2022-02-16

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Minkyu JE ,  Yechan PARK ,  Chul KIM ,  Seok-Tae KOH ,  Jeongeun LEE ,  Hongkyun KIM ,  Jaesuk CHOI

IPC: H02J50/27 ,  H02J50/23 ,  H04B5/00

CPC classification number: H02J50/27 ,  H02J50/23 ,  H04B5/0037 ,  H04B5/0031

Abstract: A power and data receiver according to the present embodiment includes: a reception coil configured to receive a power data signal from a transmission coil; a power unit forming driving power from the power data signal; and a data demodulation unit configured to demodulate a data signal from the power data signal, wherein the reception coil operates adjacent to the transmission coil to the extent that a first resonant frequency and a second resonant frequency are formed between the reception coil and the transmission coil, and the reception coil operates at a frequency greater than or equal to the first resonant frequency and smaller than or equal to the second resonant frequency in relation to the transmission coil.