Title :
A Novel Low-Voltage / High-Current ZCS-PWM DC- DC Converter with Asymmetrical Auxiliary Edge-Resonant Lossless Snubber
Author :
Mishima, Tomokazu ; Hiraki, Eiji ; Tanaka, Toshihiko ; Nakaoka, Mutsuo
Author_Institution :
Kure Coll. of Technol., Hiroshima
Abstract :
A novel zero current soft-swithing PWM half-bridge DC-DC converter topology is proposed in this paper. The newly proposed converter consists of a PWM-controlled half-bridge inverter and a current doubler rectifier linked with a high- frequency transformer. In order to attain the wide range of soft switching operation in the high voltage/low current primary side inverter, asymmetrical lossless snubbers composed by an actively-switched capacitor and lossless inductors are employed in the half-bridge arm, providing zero current switching (ZCS) that is less sensitive to the magnitude of the input current. The operation characteristics of the proposed DC-DC converter are described, and its feasibility is demonstrated with simulation and experimental results.
Keywords :
DC-DC power convertors; PWM invertors; PWM power convertors; PWM rectifiers; bridge circuits; high-frequency transformers; resonant invertors; resonant power convertors; snubbers; switching convertors; zero current switching; ZCS-PWM DC-DC converter; actively-switched capacitor; asymmetrical auxiliary edge-resonant lossless snubber; current doubler rectifier; high-frequency transformer; lossless inductors; zero current soft-swithing half-bridge inverter; DC-DC power converters; Frequency conversion; Low voltage; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Snubbers; Topology; Zero current switching;
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2007.4342081
