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

Author

Zaitsu, T. ; Ohnishi, O. ; Inoue, Takeru ; Shoyama, M. ; Ninomiya, T. ; Lee, F.C. ; Hua, G.C.

Author_Institution

NEC Corp., Kawasaki, Japan

fYear

1994

fDate

20-25 Jun 1994

Firstpage

585

Abstract

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 V_in=80 V, V_o=11.8 V, and P_o=5 W. For medium output voltage, using full-bridge rectifier stage, the converter achieved 83% efficiency at V_in=80 V, V_o=40 V, and P_o=10.7 W

Keywords

bridge circuits; piezoelectric devices; power convertors; power transformers; rectifiers; rectifying circuits; switching circuits; 10.7 W; 11.8 V; 40 V; 5 W; 72 percent; 80 V; 83 percent; ZVS; full-bridge rectifier stage; half-bridge rectifier stage; medium output voltage; output voltage; piezoelectric transformer; power converter; switching; Low voltage; Magnetic resonance; Medium voltage; National electric code; Power electronics; Power transformer insulation; Rectifiers; Resonant frequency; Stress; Switches; Switching converters; Vibrations; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Taipei

Print_ISBN

0-7803-1859-5

Type

conf

DOI

10.1109/PESC.1994.349677

Filename

349677