小功率磁耦合谐振式无线电能传输频率分裂的研究  

Study on the Frequency Splitting of the Small-power Magnetic Coupling Resonance Wireless Power Transmission

作　　者：狄东照 张开如[1] 顾华利 樊英杰[1] DI Dong-zhao ZHANG Kai-ru GU Hua-li FAN Ying-jie(College of Electrical Engineering and Automation, State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry, Shandong University of Science and Technology, Qingdao 266590, P.R. Chin)

机构地区：[1]山东科技大学电气与自动化工程学院矿山灾害预防控制省部共建国家重点实验室培育基地,青岛266590

出　　处：《科学技术与工程》2016年第31期188-191,228,共5页Science Technology and Engineering

摘　　要：针对在磁耦合谐振式无线电能传输过程中当传输距离到达一定值后,耦合因数超过临界耦合值而出现的频率分裂问题。利用互感耦合理论和等效电路模型对系统进行建模分析,得出负载电压和传输效率与耦合因数、失谐因子的关系表达式,并对其频率特性进行分析。为了改善系统在过耦合状态出现的负载电压频率分裂问题,采用了在保持其轴向距离不变的前提下,横向移动接收侧线圈的方式。进行了小功率磁耦合谐振式无线电能传输实验,结果表明通过横向移动接收侧线圈,可以有效改善频率分裂的问题,为无线电能传输在现实中应用提供了有效参考。Aiming at the problem that the frequency splitting problem occurs when the transmission distance rea- ches a certain value, the coupling factor exceeds the critical value of small magnetic coupling resonance wireless power transmission. Based on the mutual inductance coupling theory and the equivalent circuit model, the expres- sion of the relationship between the load vohage, transmission efficiency and coupling factor, loss of harmonic factor is derived, and the frequency characteristics are analyzed by mutual inductance coupling theory and the equivalent circuit model. In order to improve the frequency splitting of the load voltage in the system, the method of lateral movement of the receiving side coil was used under the condition of keeping the axial distance of the system. Final- ly, the small power magnetic coupling resonant wireless power transmission experiment platform was built. The ex- perimental results show that by lateral movement of the receiving side coil can effectively improve the frequency splitting problem, thus it provides effective reference for the application of wireless power transmission in reality.

关 键 词：磁耦合谐振 耦合因数 频率分裂 轴向距离 横向距离 无线电能传输 

分 类 号：TM724.1[电气工程—电力系统及自动化]