Abstract:

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 researches published 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 wireless energy transfer efficiency ratio  is:square wave/sine wave/triangular wave=2.622∶1.768∶1.

Key words: mutual inductance coupling, air-gap, waveform, average power, transmission efficiency