| Title |
Characteristic Analysis of Induction Phenomena in the NearbyMesh Structure Conductive Part of Large Capacity Wireless Power Transmission System |
| Authors |
채동주(Dong-Ju Chae) ; 이건호(Geon-Ho Yi) ; 임현성(Hyun-Sung Lim) ; 조성구(Sung-Koo Cho) |
| DOI |
http://doi.org/10.5370/KIEE.2019.68.1.207 |
| Keywords |
Wireless Power Transfer(WPT) ; Induction current ; Permeability ; Mesh structure |
| Abstract |
A large-capacity wireless power system is a technology that transmits electric power of kW or more in a noncontact type. Electric cars, electric buses, and electric railways. In order to increase the power transmission efficiency, a resonance method using a frequency of kHz is applied and the efficiency is 80~90%. In this case, the loss is 10 ~ 20% other than efficiency, and corresponds to several hundreds of W to several kW in kW class wireless power transmission. 35 kW wireless feed system environment, and induced current in the nearby conductive part was measured. As a result of analysis, it was confirmed that induction phenomenon is higher as the loop configuration of the conductive part per area is dense. The increase of the induced current in the mesh loop is characterized by the density of the nearby conductive part having a permeability per unit area. The concentration of the magnetic field by the permeability is increased and the induction phenomenon causing the induction current is increased. It was confirmed that induction phenomenon increases by about 2.7 times when 9 times dense structure is formed. |