Title :
A novel soft-switching full-bridge converter
Author :
Lee, Chia-Wei ; Leu, Ching-Shan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
Inserting an auxiliary switch to the conventional hard-switch full-bridge topology, a novel soft-switching full-bridge converter is proposed. Instead of the main switches, the auxiliary switch is pulse-width modulated to regulate the output voltage and soft-switching operation of the main switches can be easily achieved over full line and load ranges. Consequently, the reduced switching losses can be compensated for the auxiliary switch´s losses and its efficiency approximates to that of the phase-shift full-bridge converter. It makes the proposed converter to be an alternative approach for high frequency high efficiency power conversion applications. In addition to the circuit analysis and operation principle, a 100 kHz, 300-400 V input and a 12 V, 300 W output prototype is implemented to demonstrate its feasibility.
Keywords :
DC-DC power convertors; PWM power convertors; switching convertors; zero voltage switching; ZVS operation; auxiliary switch losses; frequency 100 kHz; power 300 W; pulse-width modulated auxiliary switch; soft-switching full-bridge DC-DC converter; switching losses; voltage 12 V; voltage 300 V to 400 V; voltage regulation; Circuit analysis; Frequency conversion; Power conversion; Pulse modulation; Space vector pulse width modulation; Switches; Switching converters; Switching loss; Topology; Voltage; Full-Bridge DC-DC converter; soft-switching;
Conference_Titel :
Power Electronics and Drive Systems, 2009. PEDS 2009. International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4166-2
Electronic_ISBN :
978-1-4244-4167-9
DOI :
10.1109/PEDS.2009.5385858