大功率串并式磁共振无线电能传输系统研究

发布时间：2018-05-09 04:07

本文选题：无线电能传输 + 串/并式　；参考：《江南大学》2015年硕士论文

【摘要】：无线电能传输(Wirelss Power Transmission简称WPT)技术得到迅速发展,已在电动汽车的移动充电、手机的无线充电、人工器官移植等领域得到广泛的应用。传统的发射侧和接收侧都是串联谐振,简称串/串式(S/S)WPT,存在对稳定性不够好和对负载变化敏感度较高的缺点,目前对发射侧串联谐振、接收侧并联谐振,简称串/并式(S/P)WPT,系统特性的研究相对较少,且只是局限于传输模型的搭建和理论分析,缺少对整个系统的总体分析,缺乏实践性,且传输功率较小,一般在几十瓦,没有充分利用谐振点实现零电压零电流软开关(ZVZCS),传输效率有待提高。针对WPT系统现存的问题本课题对大功率S/P式磁共振WPT系统的研究,具有一定的实际意义。针对S/P式WPT系统的传输功率和传输效率问题,本课题对S/P式WPT系统的传输模型进行了详细的分析,将S/P式和传统的S/S式WPT系统的传输性能进行比较,分析S/P式WPT系统的传输特性。根据电路理论推导系统的传输功率和最大效率的表达式,得到S/P式的WPT系统的传输性能的优点。在解决开关损耗问题上,本课题将磁耦合谐振零电流开关(ZCS)全桥DC/DC变换器应用到S/P式WPT传输系统中,用于降低系统的传输损耗,提高传输效率。为实现ZCS的控制目标,对发射端逆变器的工作模态进行了详细分析,与锁相技术相配合,实现接收回路的谐振频率始终与发射回路的谐振频率即逆变器的开关频率相一致的控制策略。在控制电路的设计中采用基于TMS320F2407DSP芯片为核心的数字控制系统,硬件和软件相结合,实现逆变器控制的频率跟踪。功率控制通过改变Buck电路驱动信号来改变输入端直流电压幅值从而实现功率调节。通过理论分析,利用Pspice仿真软件对磁共振串/并式WPT系统的运行状况进行了仿真,得出各部分相应的输出波形,搭建了系统对应的实验样机,给出了实验结果。
[Abstract]:Wireless power transmission Wirelss Power Transmission technology has been developed rapidly and has been widely used in the fields of mobile charging of electric vehicles, wireless charging of mobile phones, artificial organ transplantation and so on. The traditional transmitting side and receiving side are series resonance, which is referred to as serial / serial type S / S / S / WPT.It has the disadvantages of not good stability and high sensitivity to load variation. At present, the series resonance on the transmitting side and the parallel resonance on the receiving side. The study of system characteristics is relatively few, and is limited to the construction of transmission model and theoretical analysis. It lacks the overall analysis of the whole system, lack of practicality, and the transmission power is relatively small, generally in the tens of watts. The zero voltage and zero current soft switching is not fully realized by using the resonance point, and the transmission efficiency needs to be improved. In view of the existing problems of WPT system, the research of high power S / P magnetic resonance WPT system has certain practical significance. Aiming at the transmission power and transmission efficiency of S / P type WPT system, the transmission model of S / P type WPT system is analyzed in detail, and the transmission performance of S / P type WPT system is compared with that of the traditional S / P type WPT system. The transmission characteristics of S / P WPT system are analyzed. According to the circuit theory, the expressions of the transmission power and maximum efficiency of the system are derived, and the advantages of the transmission performance of the S / P type WPT system are obtained. In order to solve the switching loss problem, this paper applies the magnetically coupled resonant zero-current-switching (ZCS) full-bridge DC/DC converter to the S / P type WPT transmission system, which is used to reduce the transmission loss and improve the transmission efficiency. In order to realize the control goal of ZCS, the working mode of the transmitter inverter is analyzed in detail, which is coordinated with the phase-locked technology. The resonant frequency of the receiving loop is always consistent with the resonant frequency of the transmitting loop, that is, the switching frequency of the inverter. In the design of control circuit, the digital control system based on TMS320F2407DSP chip is adopted, and the hardware and software are combined to realize the frequency tracking of inverter control. Power control can change the DC voltage amplitude of input by changing the driving signal of Buck circuit to realize power regulation. Based on the theoretical analysis and Pspice simulation software, the operation of the magnetic resonance serial / parallel WPT system is simulated, the corresponding output waveforms of each part are obtained, the corresponding experimental prototype of the system is built, and the experimental results are given.
【学位授予单位】：江南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM724

【参考文献】