tud
Piezoelectric Transformer Integration Possibility in High Power Density Applications
2008-07-02
[Electronic ed.]
4519974-7
Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden
prv
Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, Dresden
Elektrotechnik und Informationstechnik
Phu tho / Viet nam
The contents of this work investigate the capability of integrating the PT in applications by invoking the ratio of the throughput power to volume represented by the term: power density. The fundamentals of the PT are introduced in chapter two. In chapter three, the fundamental limitations of the PT's capability of transferring power to the load are studied. There are three major limitations: temperature rise due to losses during operation, electromechanical limits of material, and interactions with output rectifier. The analysis and estimation are then verified by experiments and calculations implemented on three different PT samples fabricated from three different manufacturers. The subject of chapter four is the behavior of the PT's power amplifier. This chapter concentrates on two main amplifier topologies, optimized based on the simplicity of structure and minimization of components (passive and active): class D and class E amplifiers. The operational characteristics of these amplifiers with the PT are then comparison. Methods to track the optimum frequency and discontinuous working mode of the PT are proposed as the approaches to improve the energy transfer of the PT. In chapter five, prototypes of four devices using a PT are developed and introduced as illustrations of the integration of PTs into practical applications: an igniter for high intensity discharge (HID) lamps, high DC voltage power supplies, and electronic ballasts for LEDs, and stand-alone ionizers for food sterilizers. Some concluding statements and ideas for future works are located in the last chapter - chapter six.
620
ZN 4428
piezoelectrische Transformatoren, Leistungsdichte, diskontinuierlichen Betriebsmodus
Piezoelectric transformer, power density, discontinuous operation mode
urn:nbn:de:bsz:14-ds-1214984646187-55994
283934387
Technische Universität Dresden
pbl
Technische Universität Dresden, Dresden
Manh Cuong
Do
1977-01-22
aut
Henry
Güldner
Prof. Dr.-Ing. habil.
dgs
rev
Ng. Ph.
Quang
Prof. Dr.-Ing. habil.
rev
K.
Hoffmann
Prof. Dr.-Ing.
rev
eng
2007-12-20
2008-06-02
born digital
doctoral_thesis