Invention Grant
- Patent Title: Leakage magnetic field shielding device and wireless power transmission system including the same
-
Application No.: US16566595Application Date: 2019-09-10
-
Publication No.: US10971956B2Publication Date: 2021-04-06
- Inventor: Seungyoung Ahn , Jaehyoung Park , Bomson Lee , Hongkyun Kim
- Applicant: Korea Advanced Institute of Science and Technology , University-Industry Cooperation Group of Kyung Hee University
- Applicant Address: KR Daejeon; KR Yongin-si
- Assignee: Korea Advanced Institute of Science and Technology,University-Industry Cooperation Group of Kyung Hee University
- Current Assignee: Korea Advanced Institute of Science and Technology,University-Industry Cooperation Group of Kyung Hee University
- Current Assignee Address: KR Daejeon; KR Yongin-si
- Agency: Maier & Maier, PLLC
- Priority: KR10-2018-0109213 20180912
- Main IPC: H02J50/70
- IPC: H02J50/70 ; H02J50/12 ; H02J50/40 ; G01R33/02 ; H05K9/00

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.
Public/Granted literature
- US20200083756A1 LEAKAGE MAGNETIC FIELD SHIELDING DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM INCLUDING THE SAME Public/Granted day:2020-03-12
Information query