近场无线能量传输系统的效率研究

对于近场无线能量传输系统，输入信号的波形及平均功率发生变化，可能会对信号能量的传输效率产生一定的影响。针对该问题通过理论分析与实验验证相结合的方式，研究了近场无线能量传输系统的输入信号波形及平均功率的变化对信号能量传输效率所产生的影响。提出了选择方波、正弦波和三角波三种典型波形的信号作为输入信号，进行横、纵向全面分析的方法，得出了同一种波形的输入信号的能量传输效率是相同的，不随信号输入功率的变化而发生改变；不同波形输入信号的能量传输效率是不同的，且
方波、正弦波、三角波三种波形信号的无线能量传输效率比为2.622∶1.768∶1。

Research on Efficiency of the Near Field Wireless Energy Transmission System

For near field wireless energy transmission system,if the input signal’s waveform and the average power are changed,it may have some impact on the transmission efficiency of the signal energy.But no similar researchespublished at home or abroad.In order to fill the gaps in the research areas,in combination with theoretical analysis and experimental verification,we studied the relationship between signal’s waveform and power with its energy on wireless energy transfer efficiency.We respectively select the square wave,sine wave and triangular wave as the input waveform.Through horizontal and vertical analysis,we come to two conclusions:Same input waveform,same energy transfer efficiency.The efficiency will not change if the input power is changed; Different input waveform,different efficiency.The wirelessenergy transfer efficiency ratio is:square wave/sine wave/triangular wave=2.622∶1.768∶1.