Title :
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
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;
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
DOI :
10.1109/APEC.2012.6165993
