Title :
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
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 Vo=5 V, Io=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;
Conference_Titel :
Telecommunications Energy Conference, 1995. INTELEC '95., 17th International
Conference_Location :
The Hague
Print_ISBN :
0-7803-2750-0
DOI :
10.1109/INTLEC.1995.498948
