基于频率和相位调制的ICPT系统信号双向传输

发布时间：2018-06-06 22:47

本文选题：感应耦合电能传输 + 电容补偿　；参考：《重庆大学》2014年硕士论文

【摘要】：经过多年的发展，无线电能传输(WPT)技术已经比较成熟。感应耦合电能传输(ICPT)技术是一种基于高频电磁场近场耦合原理实现电能近距离无线传输的技术，由于不再使用导体连接，ICPT技术广泛应用于家电、石油钻井、植入医疗设备、电动汽车充电等行业。然而，在许多情况下，往往需要电能与信号的同步传输，电能为用电设备提供能量，信号传递控制指令和反馈信息。目前，分离机构的能量与信号传输技术已经十分成熟，而对能量与信号共用同一个传输通道的传输技术的研究还较少。现有的对同一通道的能量与信号同步传输技术的研究更多侧重于对于信号传输方法的研究，而对信号传输带给能量传输的影响研究较少。论文以某校企合作项目“XX电能信号耦合传输装置开发”为背景，以感应耦合电能传输技术的理论为基础，主要研究了基于频率和相位调制的ICPT系统的信号双向传输。对于信号从原边向副边的正向传输，本文介绍了一种通过改变逆变器频率并相应地改变原边谐振网络的补偿电容的调频调制方法。这种方法使得系统原边保持工作在谐振状态，，减小了能量损耗，降低了信号传输对能量传输的影响。对于信号从副边向原边的反向传输，本文介绍了一种通过改变副边补偿电容的调相调制信号传输方法。通过改变副边的补偿电容，影响原边谐振网络的输入电压和谐振电流的相位差，从而加载信号。由于信号是通过相位来表征，其特征反应速度快，因此提高了信号的传输速度。文章研究了系统原副边的等效模型，分析了系统原边的幅频特性和相频特性，介绍了信号的传输机理和调制方法，并对于信号的解调流程做了一定的介绍。由于能量与信号传输是通过同一个传输通道，因此信号传输的速度受到能量传输频率的限制，信号传输也会对能量的传输效率造成影响，系统品质因数不同，信号传输过程对能量传输效率的影响程度也不同。文章最后介绍了一种四开关管BUCKBOOST稳压电路，根据输入电压和输出电压的关系，电路将分别工作在BUCK模式、BOOST模式和BUCKBOOST模式。文章对于各个工作模式开关管的开关时序做了介绍，并对变换电路的工作效率趋势做出了分析。
[Abstract]:After years of development, wireless energy transmission WPTs technology has been relatively mature. Inductively coupled power transmission (ICPTT) technology is based on the principle of high frequency electromagnetic field near field coupling to realize the wireless transmission of power in close range. Because the conductor connection is no longer used, ICPT technology is widely used in household appliances, oil drilling, and medical equipment implantation. Electric vehicle charging and other industries. However, in many cases, the synchronous transmission of electric energy and signal is often required. Electric energy provides energy for electrical equipment, signal transmission control instructions and feedback information. At present, the energy and signal transmission technology of the separation mechanism has been very mature, but the transmission technology of energy and signal sharing the same transmission channel is still less studied. The existing research on the energy and signal synchronous transmission technology of the same channel is more focused on the research of signal transmission methods. However, there is little research on the influence of signal transmission on energy transmission. This paper is based on the theory of inductively coupled power transmission technology based on the project of "XX Power signal Coupling Transmission device Development", which is a cooperative project between school and enterprise. In this paper, the signal bidirectional transmission of ICPT system based on frequency and phase modulation is studied. This paper introduces a frequency modulation method by changing the frequency of the inverter and changing the compensation capacitance of the original side resonant network accordingly. This method makes the original edge of the system work in the resonant state, reduces the energy loss and reduces the influence of signal transmission on the energy transmission. For the reverse transmission of signal from the secondary side to the original edge, this paper introduces a phase-modulated signal transmission method by changing the compensating capacitance of the secondary edge. The phase difference between the input voltage and the resonant current of the primary side resonant network is affected by changing the compensating capacitance of the secondary side, and the signal is loaded. Because the signal is characterized by phase, the characteristic reaction speed is fast, so the transmission speed of the signal is improved. In this paper, the equivalent model of the primary and secondary edges of the system is studied, and the amplitude-frequency and phase-frequency characteristics of the original edges of the system are analyzed, and the transmission mechanism and modulation method of the signal are introduced. The demodulation process of the signal is introduced. Because the energy and signal transmission pass through the same transmission channel, the speed of the signal transmission is limited by the energy transmission frequency. Signal transmission will also affect the efficiency of energy transmission, the system quality factor is different, the signal transmission process has different influence on the energy transmission efficiency. In the end, a four-switch buck boost circuit is introduced. According to the relationship between the input voltage and the output voltage, the circuit will work in the buck mode and the buck boost mode, respectively. In this paper, the switching timing of each mode switch is introduced, and the working efficiency trend of the converter circuit is analyzed.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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