| Title |
Boost AC-DC Converter of High Power Factor and High Efficiency |
| Authors |
Dong-Kurl Kwak ; Choon-Sam Kim ; Ha-Yong Park ; Jae-Sun Shim ; Sang-Heung Shim |
| Keywords |
Boost converter ; Discontinuous sinusoidal form ; Loss-less snubber capacitor |
| Abstract |
This paper is studied on boost AC-DC converter of high power factor and high efficiency for discontinuous current control. The converter operated in discontinuous current control eliminates the complicated circuit control requirement, and reduces a number of components. The input current waveform in proposed circuit is got to be a discontinuous sinusoidal form in proportion to magnitude of ac input voltage under the constant duty cycle switching. Therefore, the input power factor is nearly unity and the control circuit is simple. Also the switching devices in a proposed circuit are operated with soft switching by the partial resonant method. The result is that the switching loss is very low and the efficiency of system is high. The partial resonant circuit makes use of a inductor using step up and loss-less snubber capacitor. The circuit topology of the converter is simplified. Some simulative results on computer and experimental results are included to confirm the validity of the analytical results. |