Type of Document Master's Thesis Author Baker, Eric Matthew URN etd-05082002-172013 Title Design of Radial Mode Piezoelectric Transformers for Lamp Ballast Applications Degree Master of Science Department Electrical and Computer Engineering Advisory Committee
Advisor Name Title Chen, Dan Y. Committee Chair Lee, Fred C. Committee Member van Wyk, Jacobus Daniel Committee Member Keywords
- lamp ballast
- piezoelectric transformer
- radial mode
Date of Defense 2002-05-07 Availability unrestricted AbstractIn the past, radial-mode piezoelectric transformer (Transoner) design has been
difficult due to the complex interaction between the physical and electrical circuit
characteristics. Prior to a design procedure, experimental design by Face Electronics, LC
led to a sample that could fit a ballast application enabling zero voltage switching (ZVS)
for the semiconductors without the use of any external inductance.
In the ballast circuit, the piezoelectric transformer is used to replace the
conventional inductor-capacitor resonant tank saving valuable space and expense. With
ballast in mind, a design process has been developed in this thesis to optimize radial
mode transformers to fit specifically tailored applications. The graphical process
described, allows the engineer to design in the capability of zero voltage switching for a
half-bridge drive while simultaneously providing highly efficient performance.
The problem of mounting a piezoelectric transformer to a circuit board has also
been addressed in this thesis. A thermally conductive mounting technique has been
developed which can enhance both the power capability and reliability of circuits
utilizing these devices.
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