Title :
New control method of piezoelectric transformer converter by PWM and PFM for wide range of input voltage
Author :
Hamamura, Sunao ; Kurose, Daisuke ; Ninomiya, Tamotsu ; Yamamoto, Mitsuru
Author_Institution :
Media Network Div., NEC Eng. Ltd., Kawasaki, Japan
Abstract :
A new control method of a piezoelectric transformer (PT) converter by PWM and PFM 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 by PWM at a fixed switching frequency and PFM at a fixed duty ratio. The PT converter implemented on a printed circuit board was experimentally evaluated and a good controllability was successfully achieved
Keywords :
AC-DC power convertors; DC-DC power convertors; PWM power convertors; controllability; piezoelectric devices; pulse frequency modulation; switching circuits; transformers; voltage control; AC-DC converter; DC-DC converter; PFM; PWM; active-clamp circuit; control method; controllability; fixed duty ratio; fixed switching frequency; output voltage control; piezoelectric transformer converter; printed circuit board; resonant circuit; AC generators; National electric code; Piezoelectric materials; Pulse width modulation; Pulse width modulation converters; RLC circuits; Switching converters; Switching frequency; Vibrations; Voltage control;
Conference_Titel :
Power Electronics Congress, 2000. CIEP 2000. VII IEEE International
Conference_Location :
Acapulco
Print_ISBN :
0-7803-6489-9
DOI :
10.1109/CIEP.2000.891383
