LLC resonant converter with wide input voltage and load range at fixed switching frequency

Author

Yoon, Kwang-Ho ; Noh, Young-Jae ; Phum, Sopeak ; Meas, Saran ; Jang, Sang-Ho ; Kim, Eun-Soo

Author_Institution

Dept. of Electr. & Electron. Eng., Jeonju Univ., Jeonju, South Korea

fYear

2012

fDate

5-9 Feb. 2012

Firstpage

1338

Lastpage

1342

Abstract

This paper presents high efficiency LLC resonant converter operating at the fixed switching frequency which is applied for PV PCS (Photovoltaic Power Conditioning System) with wide input-voltage variations. Operating modes and voltage gain analysis of LLC resonant converter with single and two resonant tanks are described. The secondary windings are connected in series for high output voltage as well as high power. The principle of operation modes, voltage gain analysis and efficiency are verified on a 700W for a single LLC resonant tank and a 1kW for two resonant tanks.

Keywords

DC-DC power convertors; photovoltaic power systems; switching convertors; windings; LLC resonant converter; PV PCS; isolated dc-dc converter; photovoltaic power conditioning system; power 1 kW; power 700 W; resonant tanks; secondary windings; switching frequency; DC-DC power converters; Equivalent circuits; Inductance; Magnetic resonance; Switching frequency; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE

Conference_Location

Orlando, FL

Print_ISBN

978-1-4577-1215-9

Electronic_ISBN

978-1-4577-1214-2

Type

conf

DOI

10.1109/APEC.2012.6165993

Filename

6165993