Manufacturing Methods and Techniques for Piezoelectric Transformers.
Quarterly progress rept. no. 1, 14 Jul-14 Oct 75,
HONEYWELL INC GOLDEN VALLEY MINN CERAMICS CENTER
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This section discusses our approach to both the 18mm and 25mm PET designs, and the advantages of this approach, along with an analytical approach used to determine performance of these transformers and the effect of various material and dimensional variations on their operational characteristics. The use of piezoelectric materials for the electrical to mechanical to electrical transfer of energy between two electrical circuits was proposed by Cady as early as 1928, but this concept did not receive significant attention until piezoelectric ceramic barium titanate was developed about 20 years later. Rosen was granted a patent in 1958 on a barium titanate piezoelectric transformer PET. An analysis of a PET was carried out by Katz, who limited his discussions to barium titanate. The advent of many types of lead zirconate-lead titanate PZ-PT ceramics in 1955-1961 brought forward a new family of materials that had greater high temperature stability and power handling capability. New designs have been proposed, which are now being adopted as power supplies for many practical considerations.
- Electrical and Electronic Equipment