Paper Title :Five Level Dc-Dc Converter With Asymmetrical Control Strategy For High Power Applications

Author :Vaka S Sandeep Kumar Reddy, Saleem Pasha

Article Citation :Vaka S Sandeep Kumar Reddy ,Saleem Pasha , (2016 ) " Five Level Dc-Dc Converter With Asymmetrical Control Strategy For High Power Applications " , International Journal of Electrical, Electronics and Data Communication (IJEEDC) , pp. 12-16, Volume-4,Issue-9

Abstract : In this paper an asymmetrical duty cycle control strategy was proposed to the TPTL dc/dc converter. The modified converter remains all the advantages of original control strategy; meanwhile, soft-switching can be achieved using the energy stored in output filter inductance and leakage inductances of transformers (or resonant inductances).Three-phase three-level (TPTL) dc/dc converter has the advantages of lower voltage and current stress on switches, which is suitable for high power and high input voltage applications. Adopting a symmetrical control strategy, the ripple frequency of input and output current can be increased significantly, resulting in a reduced filter requirement. To further reduce the current stress on switches for higher power. The improved resonant converter features zero-voltage-switching (ZVS) realization under wide load range and higher conversion efficiency. However, wide variation in switching frequency should be concerned in the applications with wide input/output voltage range. Other alternative solutions are the non resonant soft-switching threephase converters, the upper and lower commutation cell switches are subjected to different current stresses is improved by using MAT Lab/Simulink. The proposed concept can be implemented with five level topology using Matlab/simulink software. Keywords— Asymmetrical, Current Stress, Switching frequency, TPTL, ZVS.

Type : Research paper

Published : Volume-4,Issue-9

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