1. 省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学), 天津市 300130; 2. 河北省电磁场与电器可靠性重点实验室(河北工业大学电气工程学院), 天津市 300130; 3. 天津理工大学, 天津市 300384
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment (Hebei University of Technology), Tianjin 300130, China;2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province (School of Electrical Engineering, Hebei University of Technology), Tianjin 300130, China;3. Tianjin University of Technology, Tianjin 300384, China
In the practical application of wireless power transmission(WPT), multiple WPT systems which are close in distance, can work simultaneously as a normal application scenario. However, proximity coupling caused by mutual coupling of leakage magnetic field from adjacent systems brings disturbances to resonant parameters. These parameter fluctuations will reduce the system transmission efficiency. In order to solve this problem, a resonant shielding coil is designed to eliminate proximity coupling between systems. Its working principle and effect on improving the proximity coupling and transmission efficiency are analyzed. Both simulation and experiment are conducted to compare how the shape and number of turns of shielding coil affect the effectiveness of shielding. Then the shielding coil structure is optimized. The results show that the square-shape shielding coil has a good performance in reducing the parameter disturbances caused by proximity coupling, which helps system tune for improving the transmission efficiency of WPT system with proximity coupling.
LI Ruize, YANG Qingxin, LI Yongjian,et al.Efficient Shielding Design and Optimization of Wireless Power Transfer System with Proximity Coupling[J].Automation of Electric Power Systems,2019,43(21):163-169. DOI:10.7500/AEPS20190113003.