A modified SEPIC converter with high static gain for renewable applications

Author

Gules, Roger ; Santos, Walter Meneghette dos ; Annunziato, Rafael Christiano ; Romaneli, Eduardo Felix Ribeiro ; Andrea, Cristiano Quevedo

Author_Institution

CPGEI, Univ. Tecnol. Fed. do Parana - UTFPR, Curitiba, Brazil

fYear

2011

fDate

11-15 Sept. 2011

Firstpage

162

Lastpage

167

Abstract

A high step-up DC-DC converter based on the modified SEPIC converter is presented in this paper. The proposed topology presents low switch voltage and high efficiency for low input voltage and high output voltage applications. Two alternatives with and without magnetic coupling are analyzed. The magnetic coupling allows to increase the static gain with a reduced switch voltage. The theoretical analysis and experimental results are presented. Two experimental prototypes were developed with an input voltage equal to 12 V and an output power equal to 100 W. The efficiency obtained with the prototype without magnetic coupling was equal to 91.2% with an output voltage equal to 120 V and nominal output power. Efficiency equal to 95% was obtained with the prototype with magnetic coupling operating with an output voltage equal to 240 V and nominal output power.

Keywords

DC-DC power convertors; efficiency 91.2 percent; efficiency 95 percent; high output voltage applications; high static gain; high step-up DC-DC converter; low input voltage applications; magnetic coupling; modified SEPIC converter; power 100 W; renewable applications; single-ended primary-inductor converter; voltage 12 V; voltage 120 V; voltage 240 V; Capacitors; Couplings; Inductance; Inductors; Magnetic circuits; Prototypes; Switches; DC-DC converter; high static gain; renewable applications;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (COBEP), 2011 Brazilian

Conference_Location

Praiamar

ISSN

2175-8603

Print_ISBN

978-1-4577-1644-7

Electronic_ISBN

2175-8603

Type

conf

DOI

10.1109/COBEP.2011.6085178

Filename

6085178