Curvature Angle Split Suppression and Performance Optimization of Wireless Charging System Based on Curved Flexible Coil
Wen Feng1,2, Jing Fansheng1, Li Qiang1, Wang Tao1, Chu Xiaohu1
1. School of Automation Nanjing University of Science and Technology Nanjing 210000 China; 2. Jiangsu Provincial Key Laboratory of Smart Grid Technology and Equipment Zhenjiang 212000 China
Abstract Curved flexible coils can fit well with cylindrical structures such as human body, electric machine, missiles, rockets, etc., which expands the application of wireless power transfer technology in wearable devices and in other civilian or military fields. In order to improve the performance of wireless charging of devices in different wearers or applications. This paper studied the relationship between received magnetic flux linkage by curved coil, the curvature angle and the parameters of transmitter and receiver coils through theoretical calculation, simulation and experimental analysis, quantified the conditions under which curvature angle split occurs, and explored the optimal parameters of transmitter and receiver coils when the curvature changes. The results show that by maintaining an appropriate distance between two coils and avoiding curvature angle split, the degradation of wireless charging performance caused by changes in coil curvature can be greatly weakened. At the same time, by optimizing coil parameters to make system work in a critical split state, the system can obtain the optimal output power and maintain the stability of transmitted power under different bending degrees. Experimental results show that when the optimally designed receiver coil is bent in the range of 50° to 130°, the maximum current change rate is only 4.3%.
Wen Feng,Jing Fansheng,Li Qiang等. Curvature Angle Split Suppression and Performance Optimization of Wireless Charging System Based on Curved Flexible Coil[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 346-354.
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2020, Vol. 35 
