Title :
A Novel ZCS-PWM Flyback Converter With A Simple ZCS-PWM Auxiliary Circuit
Author :
Wang, Chien-Ming ; Su, Juing-Huei ; Yang, Chia-Hao
Author_Institution :
Dept. of Electr. Eng., Nat. Ilan Univ.
Abstract :
This paper proposed a novel zero-current-switching pulsewidth-modulation (ZCS-PWM) flyback dc/dc converter using a simple ZCS-PWM auxiliary circuit. The main switch and auxiliary switch operate at zero-current-switching turn on and turn off, and the all passive semiconductor devices in the proposed converter operate at zero-voltage-switching (ZVS) turn on and turn off. Besides operating at constant frequency and reducing commutation losses, the proposed converter has no additional current stress and conduction loss in the main switch in comparison to the conventional hard switching flyback converter counterpart. The averaging approach is used to estimate and examine the steady-state of the proposed converter. The principle of operation, theoretical analysis, and experimental results of the new ZCS-PWM flyback converter, rated 150 W and operating at 80 kHz, are provided in this paper to verify the performance of the proposed converter
Keywords :
DC-DC power convertors; PWM power convertors; switching convertors; zero current switching; zero voltage switching; 150 W; 80 kHz; ZCS turn off; ZCS turn on; ZCS-PWM auxiliary circuit; ZCS-PWM flyback converter; ZVS turn off; ZVS turn on; commutation losses reduction; constant frequency; passive semiconductor devices; zero-current-switching pulsewidth-modulation flyback dc/dc converter; zero-voltage-switching; DC-DC power converters; Frequency conversion; Pulse circuits; Semiconductor devices; Steady-state; Stress; Switches; Switching converters; Zero current switching; Zero voltage switching;
Conference_Titel :
Power Electronics and Drives Systems, 2005. PEDS 2005. International Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
0-7803-9296-5
DOI :
10.1109/PEDS.2005.1619795
