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A hybrid shielding structure for reduction of the leakage magnetic field in wireless power transfer system
Author(s) -
Kim Jongchan,
Jeong Minjoo,
Hong Icpyo,
Rhee Seungyeop,
Cho Inkui,
Kim Nam
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31372
Subject(s) - electromagnetic shielding , wireless power transfer , leakage (economics) , materials science , magnetic field , slab , maximum power transfer theorem , electrical engineering , ferrite (magnet) , electronic engineering , power (physics) , engineering , electromagnetic coil , physics , structural engineering , economics , macroeconomics , quantum mechanics
In this paper, we propose a hybrid shielding structure for the reduction of the leakage magnetic field in the wireless power transfer (WPT) system operating at 175 kHz. This structure consists of ferrite slab staked on the aluminum plate. The improvement in the magnetic field reduction is achieved, while minimizing the power transfer loss by optimizing the design parameters. The power transfer efficiency and leakage magnetic field are analyzed and verified through simulation and experiment. The experimental results show 77% power transfer efficiency with proposed structure, while the normalized leakage magnetic field strength was reduced up to 80% compared with the conventional shielding structures.