Parallel Driving of Piezoelectric Transformers

Parallel driving of piezoelectric transformers has been studied to increase output power, and output characteristics of multiple piezoelectric transformers that are driven in parallel from 2 to 5 have been compared to those of a single transformer. The voltage step-up ratio increased in proportion t...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1999-09, Vol.38 (9R), p.5166
Main Authors: Jeong, Hoy-Seung, Choi, Byung-Cheul, Yoo, Ju-Hyun, Im, In-Ho, Park, Chang-Yup
Format: Article
Language:English
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Summary:Parallel driving of piezoelectric transformers has been studied to increase output power, and output characteristics of multiple piezoelectric transformers that are driven in parallel from 2 to 5 have been compared to those of a single transformer. The voltage step-up ratio increased in proportion to the parallel connection number, n , but the rate of increase decreased gradually, so there was little increase with driving over 5 piezoelectric transformers in parallel. The relative efficiency showed a maximum value of 1.06 with n of 2 and a minimum value of 0.75 with n of 5. The output power increased continuously according to the parallel connection number, but the relative output power per transformer gave a value of 1.015 with n of 2 and decreased to below 1.0 with greater n , so n of 5 gave a value of 0.75.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.38.5166