Title :
Analysis, Design and Experimental Results of Wide Range ZVS Active-Clamped L-L Type Current-Fed DC/DC Converter for Fuel Cells to Utility Interface
Author :
Rathore, Akshay K. ; Bhat, Ashoka K S ; Oruganti, Ramesh
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
A wide range zero-voltage switching (ZVS) active-clamped L-L type current-fed isolated dc-dc converter is proposed for fuel cells to utility interface application. The proposed converter maintains ZVS of all switches from full load down to very light load condition for wide input voltage variation. Detailed operation, analysis, design, simulation and experimental results for the proposed converter are presented. The auxiliary active clamping circuit absorbs the turn-off voltage spike and also assists in achieving ZVS of main switches. The ZVS of auxiliary switches and main switches is achieved by the energy stored in the boost inductors and series inductor (aided by parallel inductor), respectively. Rectifier diodes operate with zero-current switching. An experimental converter rated at 200 W has been designed, built and tested in the laboratory to verify the analysis, design and performance of the proposed converter for wide variations in input voltage and load.
Keywords :
DC-DC power convertors; fuel cells; power inductors; rectifiers; zero voltage switching; active clamped L-L type current fed DC/DC converter; boost inductors; clamping circuit; fuel cells; parallel inductor; rectifier diodes; series inductor; utility interface; voltage spike; wide range zero voltage switching; Capacitors; Converters; Fuel cells; Inductance; Inductors; Zero voltage switching; Fuel cells; high-frequency dc/dc converter; renewable energy systems; zero voltage switching (ZVS);
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2011.2146214
