Paralleling DC/DC Switched Converters Based on Piezoelectric Transformers

One of the most important advantages in using piezoelectric transformers (PT) is that they operate at high frequencies with a very good efficiency [1], tipically higher than 95%. This paper presents a DC/DC converter based on two piezoelectric transformers which duplicates the output voltage frequen...

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Bibliographic Details
Main Authors: Diaz, J., Nuno, F., Gacio, D., Villegas, P.J., Prieto, M.J.
Format: Conference Proceeding
Language:English
Subjects:
Band pass filters
Ceramics
DC-DC power converters
Equivalent circuits
Frequency conversion
Power harmonic filters
Switching converters
Switching frequency
Transformers
Vibrations
Online Access:Request full text
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Summary:One of the most important advantages in using piezoelectric transformers (PT) is that they operate at high frequencies with a very good efficiency [1], tipically higher than 95%. This paper presents a DC/DC converter based on two piezoelectric transformers which duplicates the output voltage frequency ripple, maintaining the switching frequency. Also, the converter operates at a fixed frequency, and an alternative way to regulate the output power is shown. The converter is achieved by parallelizing two DC/DC converters, based on piezoelectric transformers. Of course, the size is increased, but on the other hand, the efficiency and the output ripple are improved. The obtained results evince an improvement in the overall efficiency, as well as a reduction in the output filter size, with a lower voltage ripple.
ISSN:0197-2618
2576-702X
DOI:10.1109/IAS.2009.5324815