Real time maximum power conversion tracking and resonant frequency modification for high power piezoelectric ultrasound transducer

Ghasemi, Negareh, Walker, Geoffrey R., & Broadmeadow, Mark A. H. (2015) Real time maximum power conversion tracking and resonant frequency modification for high power piezoelectric ultrasound transducer. In The 11th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2015), 9-12 June 2015, Sydney, Australia.


Piezoelectric ultrasound transducers are commonly used to convert mechanical energy to electrical energy and vice versa. The transducer performance is highly affected by the frequency at which it is excited. If excitation frequency and main resonant frequency match, transducers can deliver maximum power. However, the problem is that main resonant frequency changes in real time operation resulting in low power conversion. To achieve the maximum possible power conversion, the transducer should be excited at its resonant frequency estimated in real time. This paper proposes a method to first estimate the resonant frequency of the transducer and then tunes the excitation frequency accordingly in real time. The measurement showed a significant difference between the offline and real time resonant frequencies. Also, it was shown that the maximum power was achieved at the resonant frequency estimated in real time compare to the one measured offline.

Impact and interest:

0 citations in Scopus
Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

22 since deposited on 21 Aug 2015
19 in the past twelve months

Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 86707
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: High Power Piezoelectric Ultrasound Transducer, Power Conversion, Resonant Frequency
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Crown
Deposited On: 21 Aug 2015 00:34
Last Modified: 24 Aug 2015 11:29

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page