基于互感识别及移相角优化的全方位无线电能传输系统靶向传能方法  

Targeted Power Transfer Method for Omnidirectional Wireless Power Transfer System Based on Mutual Inductance Identification and Phase-Shift Angle Optimization

作　　者：冯天旭 史可 孙跃[2] 王佩月 蒋金橙 Feng Tianxu;Shi Ke;Sun Yue;Wang Peiyue;Jiang Jincheng(College of Automation Chongqing University of Posts and Telecommunications,Chongqing 400065 China;College of Automation Chongqing University,Chongqing 400044 China)

机构地区：[1]重庆邮电大学自动化学院,重庆400065 [2]重庆大学自动化学院,重庆400044

出　　处：《电工技术学报》2023年第24期6581-6595,共15页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(62073047);重庆市自然科学基金博士后科学基金(cstc2021jcyj-bshX0245)资助项目。

摘　　要：针对传统无线电能传输(WPT)系统中发射线圈与接收线圈发生位置或角度偏移时系统输出能效急剧下降的问题,该文提出靶向传能式全方位WPT系统,可使接收线圈处于任意方位时均能实现高效率全方位无线传能。采用具备全方位磁能发射能力的复合平面线圈作为发射机构,基于三个独立逆变器及LCC谐振补偿网络建立系统模型,推导耦合机构效率与互感及移相角的关系。在此基础上,提出基于互感识别及移相角优化的全方位WPT系统靶向传能方法,通过互感识别以间接判断出“靶”(即,接收线圈)的方位,通过移相角优化以获得靶向传能所需的激励电流。实验结果表明,接收线圈在±60 mm范围内任意移动或者旋转时的系统直流-直流效率均大于80%,提出的靶向方法比传统的旋转方法的传能效率至少高10%。The omnidirectional wireless power transfer(WPT)technology is favored by scholars at home and abroad because of its good anti-positional and angular misalignment performance.The efficiency of an omnidirectional WPT system can be improved by pointing the synthetic magnetic field generated by the omnidirectional transmitter to the receiver.It is necessary to detect the receiver's orientation and control the transmitter's excitation current in realtime.However,effective methods to identify the orientation of the receiver and adjust the excitation current are needed.To this end,an omnidirectional WPT system targeted power transfer method based on mutual inductance identification and phase-shift angle optimization is proposed.In this method,the orientation of the“target”(i.e.,the receiver)is indirectly determined by mutual inductance identification,and the excitation current required for targeted power transmission is obtained by phase-shift angle optimization.This method can realize the maximum efficiency transmission of the magnetic coupler.Besides,it does not need to detect the orientation of the receiver or a communication link.This paper uses the composite planar coil to illustrate the proposed targeted power transfer method because of its omnidirectional power transmitting capability and saving installation space advantages.The composite plane coil structure is composed of three transmitting coils(two crossed 8-shaped coils and a circular coil),and it is used as the transmitter,while a disc coil works as the receiver.To control the excitation current of the three transmitting coils separately,three independent inverters with phase-shift control are used to drive the three transmitting coils.The LCC compensation network and series compensation capacitor are used on the primary and secondary sides.Then,the relationship between the magnetic coupler efficiency,mutual inductance,and phase shift angle is derived.An omnidirectional WPT system targeted power transfer method is proposed based on mutual inductance ide

关 键 词：无线电能传输 全方位靶向传能 互感识别 移相角优化 

分 类 号：TM724[电气工程—电力系统及自动化]