摘要
为实现全向无线电能传输,基于二维正交磁耦合机构提出了磁矢量旋转和磁矢量定向的控制方式。首先,采用基波等效分析法(fundamentalharmonicapproximation, FHA)设计使电压增益可调的LCC/S谐振补偿网络。其次,依据两种控制方式的机理给出激励电流的控制方法,从理论上对比二者传输效率差异同位置的关系。在上述基础上,由Ansys/Maxwell仿真得到两种控制方式的磁场时空特点,并基于空间互感分布的Matlab/Simulink仿真模型验证了两种控制方式的可行性。最后,搭建一台实验样机对理论分析进行验证,测得样机的传输效率的空间分布。仿真和实验结果表明:所提控制方式均可应用于正交磁耦合机构实现全向无线电能传输,磁矢量定向效率优于磁矢量旋转,平均效率提升了33.18%。
To realize omnidirectional wireless power transmission,the control methods of magnetic vector rotation and magnetic vector orientation are proposed based on a two-dimensional orthogonal magnetic coupler.First,an LCC/S resonant compensation network with adjustable voltage gain is designed using the fundamental harmonic approximation(FHA)method.Second,the control method of the excitation current is given according to the mechanism of the two control methods,and the relationship between the transmission efficiency difference and position is compared theoretically.From this,the space-time characteristics of the magnetic field in the two control modes are obtained by Ansys/Maxwell simulation,and the feasibility of the two control modes is verified by a Matlab/Simulink simulation model based on the spatial mutual inductance distribution.Finally,an experimental prototype is built to compare the waveform characteristics of the two control methods and measure the spatial distribution of transmission efficiency.The simulation and experimental results show that two control methods can be applied to the orthogonal magnetic coupler for omnidirectional wireless power transmission,and the efficiency of the magnetic vector orientation is better than that of the magnetic vector rotation,with an average efficiency increase of 33.18%.This work is supported by the National Natural Science Foundation of China(No.61867003).
作者
王思明
郑浩
WANG Siming;ZHENG Hao(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730000,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2023年第12期109-121,共13页
Power System Protection and Control
基金
国家自然科学基金项目资助(61867003)。
关键词
无线电能传输
全向
磁矢量旋转
磁矢量定向
效率对比
wireless power transmission
omnidirectional
magnetic vector rotation
magnetic vector orientation
efficiency comparison
