Sensors & Transducers Journal
(ISSN 1726- 5479)
Vol. 79, Issue 5, May 2007, pp. 1186-1191
Characterization of Modified Rosen-Type Piezoelectric Transformers as a Function of Load Resistance
Department of Physics, Alabama A & M University
P.O. Box 1268, Normal, AL35762, USA
Tel.: 256 880 8533, fax: 256 732 5622
Received: 6 April 2007 /Accepted: 11 May 2007 /Published: 31 May 2007
Abstract: Two designs of modified Rosen-Type Piezoelectric Transformers (PT) have been characterized as a function of load resistance, at around their center frequencies. The studies were carried at each applied frequency when the input voltage was fixed as 8 V. The first design in this investigation was marked as (SJ8) PT. The second design was marked as (SJ9) PT. The voltage transformations behaviors observed on these PT have shown that poling alignment played a key role in both step-up and step-down voltage transformation . The results observed from (SJ8) PT proved it to be a step-up PT because the PT layers were aligned well with the poling directions; the results observed on (SJ9) PT revealed it to be a step down PT, because the PT layers were not aligned well along the poling directions . Finally, the optimal load resistance was identified as 100 kW for both PT.
Keywords: Modified Rosen-Type, PT, PZT, Drift frequencies, Load resistance, Voltage transformations, Piezoelectric Transformers
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