A Single-Stage AC/DC LLC Resonant Converter

Author

Lai, Ching-Ming ; Lee, Rong-Chyang

Author_Institution

Nat. Tsing Hua Univ., Hsinchu

fYear

2006

fDate

15-17 Dec. 2006

Firstpage

1386

Lastpage

1390

Abstract

A single-stage ac/dc LLC resonant converter is proposed to draw a sinusoidal line current, for achieving power factor correction (PFC). The proposed ac/dc converter composes of a boost-PFC semi-stage and a LLC-SRC semi-stage. The boost-PFC semi-stage, working in discontinuous conduction mode (DCM) functions as a power factor corrector, and the LLC-SRC semi-stage operates above the resonance to achieve zero-voltage switching (ZVS) operation. The proposed converter has the feature of variable-frequency control, which provides a constant output voltage, high power factor, high efficiency, and low component count. Finally, the experimental results are provided to verify the performance as expected.

Keywords

AC-DC power convertors; power factor correction; resonant power convertors; switching convertors; AC/DC LLC resonant converter; power factor correction; single-stage converter; sinusoidal line current; variable-frequency control; zero-voltage switching; Analog-digital conversion; Capacitors; IEC standards; Reactive power; Rectifiers; Resonance; Switches; Switching converters; Voltage control; Zero voltage switching; LLC; single-stage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 2006. ICIT 2006. IEEE International Conference on

Conference_Location

Mumbai

Print_ISBN

1-4244-0726-5

Electronic_ISBN

1-4244-0726-5

Type

conf

DOI

10.1109/ICIT.2006.372405

Filename

4237727