Sensors & Transducers Journal
(ISSN 1726- 5479)
Vol. 75, Issue 1, January 2007, pp. 926-934
Characterization of High Voltage Single Disk-Type Piezoelectric Transducers as a Function of Load Resistance
Department of Physics, Alabama A & M University
P.O. Box 1268, Normal, AL35762, USA
Phone: +1 256 880 8533, fax: 256 372 5622
Received: 28 December 2006 / Accepted: 22 January 2007 / Published: 29 January 2007
Abstract: Two designs of disk-type piezoelectric transducers have been characterized as a function of load resistance, at around their center frequencies. The first transducer was fabricated using BM400 material while the second transducer was fabricated using APCI-880 material. These transducers were mounted inside Teflon insulation using special screws indicated by a and b. The input voltage was then applied between ring and bottom electrode using special screws noted as 1 and 3. The output voltages from dot and bottom electrodes of these transducers were terminated with load resistance, and measured from screw 2 and 3. The voltage transformations observed from the second transducer was higher as compared to that obtained in the first transducer, because, the mechanical quality factor of APC-880 is higher than that of BM400 material. The final results of this investigation gave the optimal load resistance of each transducer when operated below and above resonant frequency.
Keywords: load resistance, piezoelectric transducers, piezoelectric transformers, BM 400, APC-880, single disk-type, resonance, center frequency
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