Piezoelectric Transformer Converter with PWM Control

Toshiyuki ZAITSU  Tamotsu NINOMIYA  Masahito SHOYAMA  

IEICE TRANSACTIONS on Communications   Vol.E80-B   No.7   pp.1035-1044
Publication Date: 1997/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Power Supply
piezoelectric transformer,  DC-DC converter,  PWM control,  active-clamp,  

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A piezoelectric transformer (PT) converter with PWM control is presented. The combination of an active-clamp circuit and a resonant circuit makes it possible to control the output voltage of the PT converter with PWM at a constant switching frequency. The PT converter circuit is evaluated using an AC analysis, and a design procedure is presented. The PT converter implemented on a printed circuit board is experimentally evaluated and a good controllability is successfully achieved.