摘要
多负载无线电能传输(WPT)系统中多个接收线圈间的复杂耦合使系统失谐,传输效率降低。针对该问题,数值模拟接线圈耦合对系统传输效率的影响,建立双负载系统受控源等效电路模型,从线圈间能量交换出发探究接收线圈耦合对系统传输特性影响机理,接收回路电流相位不同时,接收线圈之间存在有功与无功能量交换。基于此提出一种在接收回路串联电容的补偿解耦方法,补偿接收线圈从发射线圈吸收的无功功率并实现两接收回路电流同相位,提升传输效率。实验表明,接收线圈耦合系数为0.2时,解耦后系统传输效率从39%提高到86.8%。
The complex coupling between multiple receiving coils in a multi-load wirelss power transmission(WPT)system causes the system to lose tuning and the transmission efficiency to decrease.To solve this problem,the influence of coil coupling on the transmission efficiency of the system is numerically simulated.The controlled source equivalent circuit model of the dual-load system is established and the influence mechanism of receiving coil coupling on the transmission characteristics of the system is explored from the perspective of energy exchange between coils.Based on this,a compensation decoupling method is proposed to compensate the reactive power absorbed by the receiving coil from the transmitting coil and realize the current of the two receiving loops in the same phase to improve the transmission efficiency.The experiment shows that when the coupling coefficient of the receiving coil is O.2,the transmission efficiency of the system is increased from 39%to 86.8%after decoupling.
作者
赵永秀
王亚辉
魏艺超
朱龙基
ZHAO Yong-xiu;WANG Ya-hui;WEI Yi-chao;ZHU Long-ji(Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《电力电子技术》
2024年第4期72-75,共4页
Power Electronics
基金
国家自然科学基金(51777167)。
关键词
无线电能传输
耦合
补偿解耦
wirelss power transmission
cross-coupling
compensated decoupling
