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Vol. 75, Issue 1, January 2007, pp. 926-934

 

Bullet

 

Characterization of High Voltage Single Disk-Type Piezoelectric Transducers as a Function of Load Resistance

 

Selemani SEIF

Department of Physics, Alabama A & M University

P.O. Box 1268, Normal, AL35762, USA

Phone: +1 256 880 8533, fax: 256 372 5622

E-mail: seifselemani@aol.com

 

 

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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