Abstract：In this paper, a system of contactless ultrasonic power transmission based on PZT is presented, and mathematical model is established by mechanical equivalent and analogy method. The acoustic energy transfer theory and some analysis methods are proposed and the model of the system is analyzed, and expression of control coefficient, output voltage to the input voltage and load power are derived. Relations of load impedance to load power and transmission distance to the load power are studied by experiment. When system occurs resonance, transferred energy achieve maximum; when the system parameters and the transmission distance is fixed, the transfer efficiency changed with the load, and that there is a maximum value. Load power and system efficiency decrease with the increase of transmission distance. Theoretical analysis and experimental results show that ultrasonic can be used for contactless energy transfer and get rid of the limitations of acoustic-electric feed-throughs for power transmission and realize contactless energy transmission in a certain range of effective distance.
邹玉炜, 黄学良, 柏杨, 谭林林. 基于PZT的超声波无接触能量传输系统的研究[J]. 电工技术学报, 2011, 26(9): 144-150.
Zou Yuwei, Huang Xueliang, Bai Yang, Tan Linlin. Research on Contactless Ultrasonic Energy Transfer System Based on PZT. Transactions of China Electrotechnical Society, 2011, 26(9): 144-150.
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2011, Vol. 26 
