Electrical Modeling of a Wireless Ultrasonic Power Transfer System
Leung Ho Fai1, Dai Xin2, Hu Aiguo1
1.Department of Electrical and Computer Engineering The University of AucklandAuckland 1010 New Zealand 2.School of Automation Chongqing University Chongqing 400030 China
Abstract This paper presents a theoretical model for a wireless ultrasonic power transfer system in the form of equivalent circuits.Resonant characteristics of the piezoelectric transducers are modeled usingconstitutive piezoelectric equations firstly.Then a system-level equivalent circuit model is developed and analyzed to obtain the system output characteristics.Experimental results verify the proposed model and demonstrate that 2.6 W electric power can be transferred across a 5 mm thick aluminum plate to a resistive load using a pair of 28 kHz piezoelectric transducers.
Leung Ho Fai,Dai Xin,Hu Aiguo. Electrical Modeling of a Wireless Ultrasonic Power Transfer System[J]. Transactions of China Electrotechnical Society, 2015, 30(19): 85-89.
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2015, Vol. 30 
