Title :
Piezoelectric-transformer inverter with maximum-efficiency tracking and dimming control
Author :
Nakashima, Satoshi ; Ninomiya, Tomotsu ; Ogasawara, Hiroshi ; Kakehashi, Hidenori
Author_Institution :
Dept. of Elect. & Electro. Syst. Eng, Kyushu Univ., Fukuoka, Japan
Abstract :
This paper provides a solution for the problem of efficiency decrease caused by load variation and environmental temperature change. A novel control scheme of tracking the PT´s operation frequency for the maximum efficiency is proposed. As a result, a high efficiency of over 80% has been achieved even under the output current decrease down to 10% of the maximum, and under the resonant-frequency variation by environmental temperature change of -10 to +70 centigrade
Keywords :
fluorescent lamps; invertors; lamp accessories; optical variables control; piezoelectric devices; transformers; -10 to 70 C; 3 W; 88 percent; cold cathode fluorescent lamps; control scheme; dimming control; electronic ballasts; environmental temperature change; load variation; maximum-efficiency tracking; operation frequency tracking; piezoelectric-transformer inverter; resonant-frequency variation; Capacitance; Electronic ballasts; Electronic equipment; Frequency; Pulse width modulation inverters; Resonance; Switches; Switching circuits; Temperature; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989354
