Title :
Piezoelectric transformer converter with PWM control
Author :
Zaitsu, Toshiyuki ; Shigehisa, Toshiyuki ; Shoyama, Masahito ; Ninomiya, Tamotsu
Author_Institution :
Mater. Dev. Center, NEC Corp., Kawasaki, Japan
Abstract :
A piezoelectric transformer (PT) converter with PWM is presented. The active-clamp technique makes it possible to control the output voltage with PWM even if the PT converter operates in a resonant fashion. The PT converter with PWM control was implemented on a printed circuit board. The line and load regulation was successfully achieved under the input-voltage variation of 20 to 30 V, Vo=5 V, Io=0-4 A, and fs=2.08 MHz. Maximum efficiency achieved 82%
Keywords :
PWM power convertors; high-frequency transformers; piezoelectric devices; resonant power convertors; voltage control; 0 to 4 A; 2.08 MHz; 20 to 30 V; 5 V; 82 percent; PWM control; input-voltage variation; line regulation; load regulation; output voltage control; piezoelectric transformer converter; printed circuit board; resonant operation; Frequency control; Frequency estimation; Power generation; Printed circuits; Pulse width modulation; Pulse width modulation converters; Resonance; Switches; Vibrations; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1996. APEC '96. Conference Proceedings 1996., Eleventh Annual
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-3044-7
DOI :
10.1109/APEC.1996.500455
