基于超声波的无线电能传输的研究

Study of Wireless Power Transfer System Based on Ultrasonic

近年来,国内外对无线电能传输进行了广泛的研究,该文旨在研究应用超声波实现空气中无线电能传输的可行性。该文通过机电等效和类比的方法,得到了超声波电能传输的等效电路,设计了与空气声阻抗相匹配的纵-弯复合模式超声波换能器,并通过Ansys软件对换能器进行了谐响应分析,得到了电学参数和谐振频率;最后通过超声波电能传输实验平台的搭建,得到了接收换能器的输出电压和距离的关系,证明了可以通过超声波进行无线电能传输。

The wireless power transfer system has been extensively researched both at home and abroad in recent years,The feasibility of the wireless power transmission in air by using the ultrasonic has been studied in this paper.The equivalent circuit of the ultrasonic wireless power transfer system has been obtained by using the methods of the mechanical-electrical equivalence and the analogy.The longitudinal-flexural composite mode ultrasonic transducer matched with the acoustic impedance in air has been designed and the Ansys software was used to analyze the resonance response of the transducer,the electric parameters and the resonance frequency of the transducer have been obtained.A experimental platform of the ultrasonic wireless power transfer system has been built and the relationship between the output voltage of the receive transducer and the distance has been established.The experimental results showed that the ultrosoinc can be used to realize wireless power transmission.