Piezoelectric transformer converter with frequency control

Author

Zaitsu, Toshiyuki ; Shigehisa, Toshiyuki ; Inoue, Takeshi ; Shoyama, Masahito ; Ninomiya, Tamotsu

Author_Institution

Mater. Dev. Center, NEC Corp., Kawasaki, Japan

fYear

1995

Firstpage

175

Lastpage

180

Abstract

An efficient piezoelectric transformer (PT) power converter with frequency control is presented. The optimum-designed reactance components are able to keep power efficiency high while controlling the output voltage for some load variation. An implemented PT power converter with frequency control achieves an efficiency higher than 75% at V_o=5 V, I_o=0.5-2 A, and switching frequency of around 2 MHz. Furthermore, a means to improve the voltage control characteristic over a wide range is also added

Keywords

PWM power convertors; circuit optimisation; equivalent circuits; frequency control; piezoelectric devices; power transformers; voltage control; 0.5 to 2 A; 2 MHz; 5 V; design optimisation; efficiency; frequency control; piezoelectric transformer power converter; reactance components; switching frequency; voltage control characteristics; Circuits; Frequency control; Load management; Magnetic separation; Resonance; Switching converters; Switching frequency; Vibrations; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1995. INTELEC '95., 17th International

Conference_Location

The Hague

Print_ISBN

0-7803-2750-0

Type

conf

DOI

10.1109/INTLEC.1995.498948

Filename

498948