Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title AC-DC Converter using the PFC Inductor and LLC Resonant Transformer with an Integrated Magnetic Core
Authors Young-Jae Noh ; Cheol-Ha Kang ; Meas Saran ; Eun-Soo Kim ; Jong-Seob Won ; Dong-Hee Kim ; Young-Soo Lee
DOI 10.6113/TKPE/2015.20.3.262
Page pp.262-272
ISSN 1229-2214
Keywords Integrated magnetic core; LLC resonant converter; PFC Inductor; AC-DC Converter
Abstract An integrated two-in-one transformer applicable to PSUs for a 120 W LED TV is proposed. This transformer comprises a PFC inductor and an LLC transformer placed and integrated on an E?I?E type magnetic core. Performance is evaluated by observing the coupling coefficients of the proposed two-in-one transformer under various air gap topologies. Among the topologies studied, an integrated transformer with centered air gap shows stable operational characteristics with a minimized mutual coupling (interference). Furthermore, applicability of the proposed integrated transformer to PSUs for a 120 W LED TV is studied from the viewpoint of integrating different magnetic components into one core, resulting to low weight, low cost, and high power density.