摘要
在实况下的动态无线供电过程中,电动汽车由于颠簸导致收发端产生耦合角度从而引起传输功率波动,因此需要对电磁耦合结构存在耦合角度的情形进行分析。该文首先依据互感耦合模型,推导耦合系统中输出功率解析式,得出影响系统传输功率的互感系数在不同耦合角度与传输距离下的变化规律,并揭示其影响机理;其次利用有限元分析软件得到不同耦合角度与传输距离下的磁场强度分布特性,验证了理论推导的正确性;最后提出接收端采用三单元交叉式分布可减小耦合角度对系统能效的影响,并通过仿真和实验对比分析了三单元交叉线圈与单线圈在不同扰动下的磁场强度空间分布特性,证实了该结构可在实际扰动工况下稳定输出功率。
In the process of dynamic wireless power supply under actual conditions,the turbulence of electric vehicles leads to the coupling angle between receiver and transmitter,causing the fluctuation of transmission power.Therefore,it is necessary to analyze the electromagnetic coupling structure with a coupling angle.Firstly,the transmission power formula is obtained based on the mutual inductance coupling model.The change rule under different coupling angles and transmission distances is also obtained,which helps to reveal its influence mechanism.Secondly,the magnetic field intensity distribution isanalyzed by finite element analysis software,which verifies the correctness of the theoretical derivation.Then,the three-unit crosscoil distribution is proposed for the receiver to reduce the impact of the receiver vibration on the transmission efficiency of the system.Through simulation and experiment,the magnetic field intensity’s spatial distribution characteristics of three-unit crosscoil and singlecoil under different perturbations are compared,which proves that the structure can stabilize the transmission power to a certain extent.
作者
薛明
杨庆新
王嘉浩
章鹏程
Xue Ming;Yang Qingxin;Wang Jiahao;Zhang Pengcheng(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300130 China;Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tiangong University,Tianjin 300387 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第20期4232-4240,共9页
Transactions of China Electrotechnical Society
基金
国家重点研发计划(2018YFB0106300)
国家自然科学基金项目(51607121)
天津市自然科学基金项目(18JCQNJC70500)资助。
关键词
动态无线供电
耦合角度
互感
传输功率
Dynamic wireless power
coupling angle
mutual inductance
transmission power
作者简介
通信作者:薛明,男,1987年生,博士,研究方向为无线电能传输技术。E-mail:xueming@tiangong.edu.cn;杨庆新,男,1961年生,博士生导师,教授,研究方向为工程电磁场与磁技术。E-mail:qxyang@tjut.edu.cn。
