低频无线电能传输系统性能优化及实验研究

发布时间：2018-07-11 14:49

本文选题：无线电能传输 + 低频　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：本课题设计了一个低频无线电能传输系统，系统的输出功率达到3KW，最大系统传输效率超过80%，无线传输距离为8cm-10cm，工作频率低于10kHz，，本文对无线电能传输系统的基本理论进行了推导和分析，使用互感耦合模型计算得到了相应公式，针对课题提高传输距离的要求对使用利兹线情况下的有效距离做计算，得到了此时相应的公式，并分析各项参数对有效传输距离的影响。通过理论计算可以更好的理解无线电能传输系统设计的关键并有效地指导实际系统的搭建。根据系统需要对低频无线电能传输系统进行电路系统的设计，使用了数字控制芯片来调节系统频率，逆变电路采用全桥逆变电路，有利于提高系统效率，由于系统工作频率低且输出功率较大，选用IGBT作为全桥逆变电路的开关器件，为其配置适当的驱动模块以及外围缓冲电路等。除了弱电部分的设计还对带功率的无线传输部分的每一部分做了分析，通过对电容以及线型材料等的比较最终确定了电容型号和缠绕电感的导线材料。使用仿真软件对线圈匝数进行仿真根据耦合系数变化趋势选取合适的匝数，并做了电路仿真得到原边和副边电感值对系统功率和效率的影响，进而获得最佳的原边和副边电感值，极大地改善了系统性能。负载的确定也由仿真得到，在确保不发生频率分叉的情况下通过仿真曲线结果来决定负载大小。为了比较不同固有频率的系统的特性，本文对PSSP结构和PSSS结构下的拥有不同固有频率的系统进行了仿真，得到了各个系统的功率效率三维图形，对每一系统进行分析以及整体比较下各个系统可以得到系统随着固有频率的变化而变化的趋势，根据此结论，进一步对耦合系数和负载进行仿真，得到耦合系数和负载大小对无线电能传输系统的影响。鉴于实际实验操作的不方便性，本文还对系统的初始起振情况进行仿真，得到电流的起振波形，确保系统的安全性。在本文最后给出了实际系统的各项参数值，并对系统进行了各项特性实验，包括不同距离下的升压实验、扫频实验、变负载实验以及进一步的移位传输实验，得到系统的基本特性，此外，更改系统的固有频率并进行实验，获得了相应实验曲线及分析结果。
[Abstract]:In this paper, a low frequency radio energy transmission system is designed. The output power of the system is 3kW, the maximum system transmission efficiency is more than 80, the wireless transmission distance is 8cm-10cm, the working frequency is less than 10kHz. The basic theory of radio energy transmission system is deduced and analyzed in this paper. The corresponding formula is obtained by using the mutual inductance coupling model. The effective distance under the Leeds line is calculated according to the requirement of increasing the transmission distance, and the corresponding formula is obtained. The effect of the parameters on the effective transmission distance is analyzed. Through theoretical calculation, we can better understand the key of the design of radio energy transmission system and effectively guide the construction of the actual system. According to the need of the system, the low frequency radio energy transmission system is designed. The digital control chip is used to adjust the frequency of the system, and the full-bridge inverter circuit is used to improve the efficiency of the system. Because of the low operating frequency and high output power IGBT is selected as the switch device of the full-bridge inverter circuit with proper driving module and peripheral buffer circuit. Besides the design of weak current part, every part of wireless transmission part with power is analyzed. Through the comparison of capacitance and linear material, the capacitance type and conductor material of winding inductance are determined. The coil turns are simulated by using the simulation software according to the changing trend of coupling coefficient, and the circuit simulation is done to get the effect of the inductance of the primary and secondary edges on the power and efficiency of the system. The optimal inductance of primary and secondary edges is obtained, and the system performance is greatly improved. The load is determined by simulation, and the load size is determined by the result of simulation curve without frequency bifurcation. In order to compare the characteristics of the system with different natural frequencies, this paper simulates the system with different inherent frequencies under PSSP structure and PSSS structure, and obtains the three dimensional figure of power efficiency of each system. According to the analysis of each system and the comparison of each system as a whole, the change trend of the system with the change of natural frequency can be obtained. According to this conclusion, the coupling coefficient and load are further simulated. The influence of coupling coefficient and load on radio energy transmission system is obtained. In view of the inconvenient operation of the actual experiment, the paper also simulates the initial vibration of the system, and obtains the starting waveform of the current to ensure the security of the system. At the end of this paper, the parameters of the actual system are given, and the characteristic experiments of the system are carried out, including the booster experiment at different distance, the frequency sweep experiment, the variable load experiment and the further shift transmission experiment. The basic characteristics of the system are obtained. In addition, the corresponding experimental curves and analysis results are obtained by changing the natural frequency of the system and conducting experiments.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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