磁耦合共振型无线输电系统的研究

发布时间：2018-03-08 04:01

本文选题：磁耦合共振　切入点：无线输电　出处：《兰州理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：用电设备以非接触的方式获取电能的技术称为无线电力传输技术。其使得用电设备摆脱了型号复杂的充电器和降低设备密封性的电源接口,同时可以避免插拔接头所产生的电火花等传统导线式输电方式的弊端,所以无线输电方式具有极大的便捷性和安全性。传统的感应式无线输电技术,如手机的无线充电底座、电动牙刷充电,其具有传输距离短、传输功率小、散热难等问题。论文所研究的磁耦合共振型无线输电系统是在2007年提出的新型无线输电技术,其具有传输距离远、传输功率大、选择性传输等优势,其大大的拓宽了无线输电的应用领域。随着电动汽车的迅速发展,磁耦合共振型无线输电技术所具有的优势越发突显出来,其在电动汽车充电领域具有巨大的应用前景,因此磁耦合共振型无线输电系统也成为了近两年的学术界研究热点。无线输电存在效率低,传输距离短等问题。传统感应式无线电系统传输距离在毫米等级；电磁辐射式无线输电系统由于是辐射式传播,所以传输效率很低。论文根据无线输电的传输特性建立磁耦合共振模型,基于耦合模理论与共振理论分析计算出无线输电系统的最优传输频率,也就是使系统发生强耦合共振的工作频率。分析总结了拓扑结构、传输距离、线圈特性等对于系统传输效率的影响。并利用有限元分析法,在CST电磁仿真软件上对所计算的共振频率进行实验验证,分析不同负载情况下系统的传输特性,实验结果表明所计算出的共振频率可以使系统工作在较高效的强耦合传输状态。实验中发现当负载接入时,发射端会出现频率跌落现象。为保证系统工作在最优频率,所以在设计样机时在发射电源部分加入了频率锁定模块。最后搭建磁耦合共振型无线输电硬件系统,在12cm处点亮4瓦的LED灯,实现了电力的无线传输。
[Abstract]:The technology in which electrical equipment obtains electricity in a non-contact manner is called wireless power transmission technology. It enables electrical equipment to get rid of complex types of chargers and power supply interfaces that reduce device sealing. At the same time, it can avoid the disadvantages of the traditional traverse transmission mode such as electric spark, so wireless transmission mode has great convenience and security. Traditional inductive wireless transmission technology, such as the wireless charging base of mobile phone, can be avoided. Electric toothbrush charging has many problems, such as short transmission distance, low transmission power and difficult heat dissipation. The magnetically coupled resonance wireless transmission system is a new type of wireless transmission technology proposed in 2007, which has long transmission distance. With the rapid development of electric vehicles, the advantages of magnetically coupled resonance wireless transmission technology have become more and more prominent. It has great application prospect in the field of electric vehicle charging, so magnetic coupling resonance wireless transmission system has become a hot research topic in academic circles in recent two years. The transmission distance of the traditional inductive radio system is in the millimeter level; the electromagnetic radiation type wireless transmission system is radiative transmission, So the transmission efficiency is very low. Based on the transmission characteristics of wireless transmission, the magnetically coupled resonance model is established, and the optimal transmission frequency of wireless transmission system is calculated based on coupling mode theory and resonance theory. The influence of topology, transmission distance and coil characteristics on the transmission efficiency of the system is analyzed and summarized. The calculated resonance frequency is experimentally verified by CST electromagnetic simulation software, and the transmission characteristics of the system under different loads are analyzed. The experimental results show that the calculated resonant frequency can make the system work in a more efficient state of strong coupling transmission. It is found in the experiment that the frequency drop will occur at the transmitter when the load is connected. In order to ensure the optimal frequency of the system, Therefore, the frequency locking module is added to the transmission power supply when the prototype is designed. Finally, the magnetically coupled resonant wireless transmission hardware system is built, and the 4-watt LED lamp is illuminated at 12cm to realize the wireless transmission of power.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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