植入式磁耦合谐振无线电能传输研究

发布时间：2019-03-13 13:17

【摘要】：磁耦合谐振式无线电能传输(Wireless Power Transfer)技术是一种无需导体线直接相连的电能传输技术,相比于有线电能传输,具有安全可靠等优点,特别是在一些易爆的矿井油井、水下环境等具有有线电能传输无可比拟的优势,更能在植入式医疗微电子设备及相关应用中起到巨大的作用,具有重大的科研意义。本文以植入式器件的无线供电为应用背景开展研究,以提高磁耦合谐振无线能量传输的传输效率为目标,首先分析了磁耦合谐振无线能量传输系统的电路模型,建立了二线圈和四线圈系统的完整和简化电路模型,分析了线圈品质因数、耦合系数对系统性能的影响,并将四线圈谐振系统与二线圈谐振系统进行了对比;此外,针对四种电容补偿结构分析了各自的优缺点;然后,针对印制电路板线圈(Printed Circuit Board)实现的二线圈无线能量传输系统,通过建立线圈的电感、寄生电阻和寄生电容的解析模型,找到系统工作的最优工作频率,并通过仿真和实验进行了验证;最后,针对脑机接口(Brain computer interfacing)中神经元信号采集等应用下的植入式器件的无线供电系统,研究了毫米尺寸接收线圈为螺旋管(Solenoid)形式时的尺寸和工作频率的优化,经仿真和实验验证可知,当采用AWG36铜线绕制时,1-mm3尺寸的接收线圈的圈数为6,相邻圈间距为0.2326mm时,线圈结构达到最优,最优结构的最优工作频率为700MHz。
[Abstract]:Magnetic coupled resonant radio energy transmission (Wireless Power Transfer) technology is a kind of electric energy transmission technology without direct connection of conductor wire. Compared with wired power transmission, it has the advantages of safety and reliability, especially in some easy-to-explode mine wells. Underwater environment has incomparable advantages over wired power transmission, and can play a great role in implantable medical microelectronic devices and related applications, and has great scientific significance. In order to improve the transmission efficiency of magnetically coupled resonant wireless energy transmission, the circuit model of magnetic coupled resonant wireless energy transmission system is analyzed firstly, based on the application background of wireless power supply of implantable devices and the aim of improving the transmission efficiency of magnetically coupled resonant wireless energy transmission system. The integrated and simplified circuit models of the two-coil and four-coil systems are established. The effects of the coil quality factor and coupling coefficient on the performance of the system are analyzed, and the four-coil resonant system is compared with the two-coil resonant system. In addition, the advantages and disadvantages of the four kinds of capacitor compensation structures are analyzed. Then, aiming at the two-coil wireless energy transmission system of PCB coil (Printed Circuit Board), the optimal operating frequency of the system is found by establishing the analytical model of inductance, parasitic resistance and parasitic capacitance of the coil. It is verified by simulation and experiment. Finally, aiming at the wireless power supply system of implantable devices under the application of neuron signal acquisition in brain-computer interface (Brain computer interfacing), the optimization of the size and working frequency of millimeter-size receiving coil in the form of spiral tube (Solenoid) is studied. The simulation and experimental results show that when the AWG36 copper wire is used, the coil number of 1-mm3 size receiving coil is 6, and the distance between adjacent coils is 0.2326mm, the coil structure is optimal and the optimal working frequency of the optimal structure is 700MHz.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM724

【参考文献】