The Development Of Wireless Power Transfer Technologies For Low Power Applications: An Acoustic Based Approach

Nur Farahin, Mokhtar (2015) The Development Of Wireless Power Transfer Technologies For Low Power Applications: An Acoustic Based Approach. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Wireless power transfer (WPT) is the transmission of electrical power across a medium without the use of electrical conductors. There is three major type of WPT which are Acoustic Power Transfer (APT), Inductive Power Transfer (IPT) and Capacitive Power Transfer (CPT). Between these, the APT has the advantages of such as can be used where the EM fields are not allowed, and the efficiency of APT is much higher compared to IPT in terms of greater distance transfer power range and different medium of transfer i.e (body tissue, water, air, etc). Due to this fact, for this project the acoustic method has been considered. This project aims to transfer low power wirelessly by using the acoustic based method. The feasibility of transmitting electric power through some specific surface or material by propagating acoustic waves using piezoelectric transducers was analysed. The efficiency of power transmission for APT has been briefly examined at the different transmission medium. For this project, the metal block and air were chosen as the transfer medium and the efficiency performance of these medium have successfully been analyzed. In the end, a prototype of APT system was developed which was capable of transferring voltage through air at the maximum distance of 10cm at 0.96V. The performances analyses of the developed prototype are discussed and the future recommendation of this method is also presented.

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