Title :
Analysis and design of LLC resonant converter considering rectifier voltage oscillation
Author :
Park, Ki-Bum ; Kim, Bong-Chul ; Lee, Byoung-Hee ; Kim, Chong-Eun ; Moon, Gun-Woo ; Youn, Myung-Joong
Author_Institution :
Div. of Electr. Eng., KAIST, Daejeon, South Korea
Abstract :
The LLC resonant converter employing the center-tap rectifier can suffer from high voltage oscillation across the secondary diodes owing to the transformer secondary leakage inductance. The amplitude of the voltage oscillation is varied according to the operation region, i.e., below resonant region and above resonant region. To reduce the diode voltage stress without snubbers, this paper analyzes the voltage oscillation mechanism and presents the design guideline for small voltage oscillation.
Keywords :
circuit oscillations; power convertors; rectifying circuits; LLC resonant converter analysis; LLC resonant converter design; amplitude variation; center-tap rectifier voltage oscillation; secondary diode; snubber; transformer secondary leakage inductance; LLC resonant converter; rectifier voltage oscillation;
Conference_Titel :
Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-2893-9
Electronic_ISBN :
978-1-4244-2893-9
DOI :
10.1109/ECCE.2009.5316286
