Title :
Zero-voltage and zero-current switching single-stage PFC AC to DC half-bridge converter with low cost
Author :
Kang, Feel Soon ; Choi, Cheol ; Kim, Cheul-U ; Park, Sung-Jun
Author_Institution :
Dept. of Electr. Eng., Pusan Nat. Univ., South Korea
Abstract :
Zero-voltage and zero-current-switching (ZVZCS) single-stage half-bridge AC/DC converter with high power factor is presented to reduce the switching losses and to achieve sinusoidal, unity power factor input currents. This single-stage approach, which combines a boost converter used as PFC with a half-bridge converter used as DC/DC conversion into one power stage, has a simple structure and low cost. At the same time, the switching losses could be considerably reduced, because the switches of the proposed converter are designed to be turned on at zero-voltage and off at zero-current. Detailed analysis and experimental results are presented on the proposed converter, which is operated at constant switching frequency and in discontinuous conduction mode
Keywords :
AC-DC power convertors; bridge circuits; power factor correction; switching circuits; constant switching frequency operation; discontinuous conduction mode; high power factor; single-stage half-bridge AC/DC converter; sinusoidal unity power factor input currents; switching losses reduction; zero-current-switching; zero-voltage switching; Analog-digital conversion; Circuits; Costs; Power factor correction; Reactive power; Snubbers; Switches; Switching converters; Switching loss; Zero current switching;
Conference_Titel :
Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE
Conference_Location :
Nagoya
Print_ISBN :
0-7803-6456-2
DOI :
10.1109/IECON.2000.973169