Title :
A New ZVS-PWM Active-Clamping Buck-Boost Converter
Author :
Duarte, Cláudio M C ; Fiori, Vitor Mauro
Author_Institution :
Sch. of Eng., Catholic Univ. of Pelotas
Abstract :
A new buck-boost converter featuring clamping action, PWM modulation and soft-switching (ZVS) in both active and passive switches, is proposed to overcome the limitations of clamped mode buck-boost converter. The new converter is generated from an improved cell of ZVS-PWM active clamping dc-to-dc converters. As the resonant circuits absorb all parasitic reactances, including transistor output capacitance and diode junction capacitance, this converter is suitable for high-frequency operation. Principle of operation, of the new converter, theoretical analysis, simulation and experimental results are presented, taken from a laboratory prototype rated at 500 W, input voltage of 150 V, output voltage of 50 V, and operating at 100 kHz
Keywords :
PWM power convertors; switching convertors; zero current switching; zero voltage switching; 100 kHz; 150 V; 50 V; 500 W; ZVS; ZVS-PWM active-clamping buck-boost converter; active switches; diode junction capacitance; parasitic reactances; passive switches; resonant circuits; soft-switching; transistor output capacitance; Clamps; DC-DC power converters; Diodes; Parasitic capacitance; Pulse width modulation; Pulse width modulation converters; RLC circuits; Switches; Switching converters; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581817
