全方向无线电能传输电磁耦合系统仿真分析

Simulation Analysis of Electromagnetic Coupling System for Omnidirectional Wireless Power Transfer

近年来,全方向无线电能传输技术由于具有位置鲁棒性好、安全可靠性高和环境亲和力强等独特优势,受到国内外研究机构和科研院所的广泛关注。高性能的电磁耦合系统作为全方向无线电能传输系统的关键环节,对实现高效的系统能量传输有着至关重要的作用。首先,运用电路理论建立了全方向线圈结构的等效电路模型,得到系统输出电压和输出功率的表达式,并给出了系统激励源的控制方案;其次,对全方向无线电能传输的充电场景进行分析,分析了三维正交圆环形线圈结构方案的弊端,提出了正方体线圈结构方案;最后,建立两种磁耦合线圈结构方案的数学模型,得出互感与接收线圈的位置、充电场景和旋转角度的关系。通过仿真实验验证了理论分析的正确性,为全方向无线电能传输电磁耦合系统的设计提供了参考和借鉴。

In recent years,the omnidirectional wireless power transfer technology has attracted extensive attention of domestic and foreign research institutions and institutes owing to its unique advantages such as good location robustness,high safety and reliability,and strong environmental affinity.The high-performance electromagnetic coupling system is the key link in an omnidirectional wireless power transfer system,which is important for the realization of the system’s efficient energy transfer.First,the equivalent circuit model of an omnidirectional coil structure is established by using the circuit theory,and the expressions of system output voltage and output power are obtained.In addition,the control scheme for the system’s excitation source is also given.Then,the charging scenarios of omnidirectional wireless power transfer are analyzed.The disadvantages of a 3 D-orthogonal circular ring transmitting coil structure scheme are analyzed,and a cube transmitting coil structure scheme is proposed.Finally,the mathematical models of two magnetic coupling coil structure schemes are established,thus obtaining the relationship between mutual inductance and the position of receiving coil,charging scenario and rotation angle.The theoretical analysis is verified by simulation experiments,providing reference for the design of an electromagnetic coupling system of omnidirectional wireless power transfer.