Design of Interleaved Interdigitated Electrode Multilayer Piezoelectric Transformer utilizing Longitudinal and Thickness Mode Vibrations

Martin Schøler Rødgaard, Thomas Andersen, Michael A. E. Andersen, K.S. Meyer

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Abstract

In applications of high voltage and low power capacitor charging, conventional magnetic based power converters often suffer from bulky components and poor
efficiency. Piezoelectric transformer (PT) based converters however, are compact and efficient, especially at high step-up applications. In this paper an interleaved interdigitated electrode (IDE) multilayer PT utilizing longitude and thickness mode vibration for high step-up and high output voltage is developed, for driving capacitive loads of up to 2.5kV. The PT possesses native soft switching capabilities, enabling the utilization of inductor-less topologies. One of the main advantages of the IDE’’s
is that it enables the PT to operate in longitudinal vibration and thickness mode through the electromechanical coupling coefficient k33. This also permits the realization of the PT through a low build-up height (below 2-4mm), making the manufacturing much easier and cheaper. As a result an interleaved IDE PT, with a soft switching factor of 1.00 and a gain of 38 has been developed.
Original languageEnglish
Title of host publicationProceedings of the 2012 IEEE International Conference on Power and Energy (PECon)
Number of pages6
PublisherIEEE
Publication date2012
Publication statusPublished - 2012
Event2012 IEEE International Conference on Power and Energy (PECon) - Kota Kinabalu Sabah, Malaysia
Duration: 2 Dec 20125 Dec 2012

Conference

Conference2012 IEEE International Conference on Power and Energy (PECon)
CountryMalaysia
CityKota Kinabalu Sabah
Period02/12/201205/12/2012

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