无线电能传输系统实本征态与零相角点分析  

Analysis of real eigenstates and zero phase angle of wireless power transfer system

作　　者：龚舒 陈绍南 肖静 侯湘 GONG Shu;CHEN Shaonan;XIAO Jing;HOU Xiang(Power Dispatching Control Center,Guangxi Power Grid Co.,Ltd.,Nanning 530023,P.R.China;Electric Power Research Institute,Guangxi Power Grid Co.,Ltd.,Nanning 530023,P.R.China;College of Automation,Chongqing University,Chongqing 400044,P.R.China)

机构地区：[1]广西电网有限责任公司电力调度控制中心,南宁530023 [2]广西电网有限责任公司电力科学研究院,南宁530023 [3]重庆大学自动化学院,重庆400044

出　　处：《重庆大学学报》2023年第2期140-148,共9页Journal of Chongqing University

基　　金：广西重点研发计划资助项目(AB19245041);重庆市自然科学基金资助项目(cstc2021jcyi-msxm4008)。

摘　　要：磁耦合无线电能传输(Magnetic coupling wireless power transfer,MC-WPT)系统的能效受原副边线圈距离的影响较大。在过耦合状态下,由于发生了频率分裂,会导致系统的能效随着传输距离的减小而下降。通过本征模态理论求取系统的实本征态工作条件使系统在过耦合区保证在零相角点处以最大能效工作。并从零相角点的角度出发对比该工作模式和实本征态模式的相似之处。从而实现了利用频率跟踪使系统在过耦合区保持恒功率和恒效率输出。最后,进行了仿真验证,证实了本文计算结果的正确性。The energy efficiency of the magnetically coupled wireless energy transmission system is greatly affected by the distance between the primary and secondary coils. In the over-coupled state, the energy efficiency will decrease as the transmission distance decreases due to the frequency splitting of the system. In this paper, the actual eigenstate working conditions of the system are obtained through the eigenmode theory so that the system can ensure maximum energy efficiency in the over-coupling region and the similating betewwn the actual eigenstate and the real eigenstate is compared from the perspective of the zero phase angle point. Thus, frequency tracking is used to make the system maintain constant power and constant efficiency output in the over coupling region. Finally, the correctness of the calculation results in this paper is verified by simulation.

关 键 词：磁耦合无线电能传输 实本征态 零相角点 

分 类 号：TM724[电气工程—电力系统及自动化]