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Piezoelectric transformer operating in thickness extensional vibration and its application to switching converter

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7 Author(s)
T. Zaitsu ; NEC Corp., Kawasaki, Japan ; O. Ohnishi ; T. Inoue ; M. Shoyama
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A new type of piezoelectric transformer (PT) power converter incorporating the ZVS technique is presented. A combination of the ZVS technique and the PT successfully achieves higher efficiency. For low output voltage, using half-bridge rectifier stage, the converter achieved 72% efficiency, at Vin=80 V, Vo=11.8 V, and Po=5 W. For medium output voltage, using full-bridge rectifier stage, the converter achieved 83% efficiency at Vin=80 V, Vo=40 V, and Po=10.7 W

Published in:

Power Electronics Specialists Conference, PESC '94 Record., 25th Annual IEEE

Date of Conference:

20-25 Jun 1994