Modeling and analysis of ultrasonic power transfer system with tightly coupled solid medium

Ultrasonic Power Transfer (UPT) has been developed as an alternative solution for achieving wireless power transfer. This paper proposes a new model describing UPT systems with tightly coupled piezoelectric transducers firmly bound to solid media. The model is derived from the short-circuit admittance of the system measured from the primary transducer. The mechanical characteristics of the system are modeled with parallel LCR branches, which reveal the fundamental relationships between the power transfer characteristics of the tightly coupled UPT system and system parameters. The loading conditions for achieving the maximum power transfer are identified, and the operating frequencies corresponding to the peak power transfer points for variable loads are determined. A practical UPT system is built with two 28 kHz Langevin-type piezoelectric transducers connected to a 5 mm-thick aluminum plate, and the practical results have verified the accuracy of the proposed model.

[1]  Stewart Sherrit,et al.  Studies of acoustic-electric feed-throughs for power transmission through structures , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  J. L. Duarte,et al.  Contactless energy transfer through air by means of ultrasound , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[3]  Y. Hu,et al.  Transmitting electric energy through a metal wall by acoustic waves using piezoelectric transducers , 2003, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[4]  Doron Shmilovitz,et al.  Simultaneous backward data transmission and power harvesting in an ultrasonic transcutaneous energy transfer link employing acoustically dependent electric impedance modulation. , 2014, Ultrasonics.

[5]  Ian Powlesland,et al.  Modelling and Experimental Validation of the Acoustic Electric Feedthrough Technique , 2008 .

[6]  Stewart Sherrit,et al.  Wireless piezoelectric acoustic-electric power feedthru , 2007, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[7]  David Cheeke.  Fundamentals and Applications of Ultrasonic Waves , 2002 .

[8]  R. C. Weast.  CRC Handbook of Chemistry and Physics , 1973 .

[9]  H. Tilmans.  Equivalent circuit representation of electromechanical transducers: I. Lumped-parameter systems , 1996 .

[10]  Elena A. Lomonova,et al.  Acoustic Energy Transfer: A Review , 2013, IEEE Transactions on Industrial Electronics.

[11]  Mahmoud Saadat,et al.  A mm-sized implantable device with ultrasonic energy transfer and RF data uplink for high-power applications , 2014, Proceedings of the IEEE 2014 Custom Integrated Circuits Conference.

[12]  S. Ozeri,et al.  Ultrasonic transcutaneous energy transfer for powering implanted devices. , 2010, Ultrasonics.

[13]  Woosub Youm,et al.  Biocompatible wireless power transferring based on ultrasonic resonance devices , 2013 .

[14]  Aiguo Patrick Hu,et al.  Wireless electric power transfer based on Acoustic Energy through conductive media , 2014, 2014 9th IEEE Conference on Industrial Electronics and Applications.

[15]  Grant Covic,et al.  Inductive Power Transfer , 2013, Proceedings of the IEEE.

[16]  T. J. Lawry,et al.  Analytical modeling of a sandwiched plate piezoelectric transformer-based acoustic-electric transmission channel , 2012, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[17]  Gary J. Saulnier,et al.  Estimating channel capacity and power transfer efficiency of a multi-layer acoustic-electric channel , 2013, Defense, Security, and Sensing.

[18]  Wenxing Zhong,et al.  A Critical Review of Recent Progress in Mid-Range Wireless Power Transfer , 2014, IEEE Transactions on Power Electronics.

[19]  Doron Shmilovitz,et al.  Ultrasonic transcutaneous energy transfer using a continuous wave 650 kHz Gaussian shaded transmitter. , 2010, Ultrasonics.

[20]  Kee S. Moon,et al.  Resonant ultrasonic wireless power transmission for bio-implants , 2014, Smart Structures.

[21]  Aiguo Patrick Hu,et al.  A generalized coupling model for Capacitive Power Transfer systems , 2010, IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society.

[22]  Stewart Sherrit,et al.  High-power piezoelectric acoustic-electric power feedthru for metal walls , 2008, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[23]  Lawrence E. Kinsler,et al.  Fundamentals of acoustics , 1950 .

[24]  Stewart Sherrit,et al.  Efficient electromechanical network model for wireless acoustic-electric feed-throughs , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[25]  T. J. Lawry,et al.  A high-performance ultrasonic system for the simultaneous transmission of data and power through solid metal barriers , 2013, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[26]  Stewart Sherrit,et al.  1KW Power Transmission using Wireless Acoustic -Electric Feed -through (WAEF) , 2008 .