利用超声波方式实现无线电能传输的可行性的研究

Feasibility of ultrasonic wireless power transmission

近几年来,无线电能传输受到了国内外学者的广泛关注,但以超声波作为电能传输媒介的方式,却没有得到足够的重视。基于超声波的无线电能传输具有方向性强、能量易于集中以及传播距离足够远等优点,本文给出了基于超声波无线电能传输的电路模型;当以压电材料作为超声换能器时,通过对压电材料的机电等效,得到了超声波无线电能传输的等效电路图;并给出了适合于超声波无线电能传输的两类换能器,估算了超声波电能传输的效率。

Wireless power transmission（WPT） has attracted extensive attention from scholars at home and abroad in recent years,but ultrasonic has not yet received sufficient attention as a power transmission medium.Ultrasonic WPT has several advantages,such as strong directional transmission,its energy easily to be focused,with far e-nough distance and so on.This paper proposed an electric circuit model of ultrasonic WPT.When piezoelectric ma-terials used as ultrasonic transducers,we obtained the equivalent circuit diagram of ultrasonic WPT through electro-mechanical equivalent circuit diagram of piezoelectric materials.And two types of ultrasonic transducers were ana-lysed which were applicable to ultrasonic WPT.Also the efficiency of ultrasonic WPT was estimated.