A high frequency current source converter with adjustable magnitude to drive high power piezoelectric transducers

Ghasemi, N., Zare, F., Ghosh, A., & Langton, C.M. (2012) A high frequency current source converter with adjustable magnitude to drive high power piezoelectric transducers. In Katić, Vladimir & Boroyevich, Dushan (Eds.) Proceedings of the 15th International Power Electronics and Motion Control Conference,, IEEE, Serbia, 5.1-5.4.

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Abstract

A general electrical model of a piezoelectric transducer for ultrasound applications consists of a capacitor in parallel with RLC legs. A high power voltage source converter can however generate significant voltage stress across the transducer that creates high leakage currents. One solution is to reduce the voltage stress across the piezoelectric transducer by using an LC filter, however a main drawback is changing the piezoelectric resonant frequency and its characteristics. Thereby it reduces the efficiency of energy conversion through the transducer. This paper proposes that a high frequency current source converter is a suitable topology to drive high power piezoelectric transducers efficiently.

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ID Code: 58152
Item Type: Conference Paper
Refereed: Yes
Keywords: High power converter, Piezoelectric transducer, Current source converter, Modelling , Filter
DOI: 10.1109/EPEPEMC.2012.6397206
ISBN: 9781467319713
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Power and Energy Systems Engineering (excl. Renewable Power) (090607)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 IEEE
Deposited On: 13 Mar 2013 04:29
Last Modified: 12 Jun 2013 15:36

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