| Title |
A Study on Loss Analysis of ZVT-PWM Boost Converter using Quasi-Resonant Technique |
| Authors |
Joung-Rae Kim ; Kyoung-Soo Park ; Won-Ki Sung ; Choon-Sam Kim |
| Abstract |
Recently, DC-DC converters significantly increase the total losses as rising switching frequency. Traditional soft switching technique for reducing switching losses even increase voltage/current stress of switch. In this paper, Resonant circuit for soft switching is connected in parallel with power stage and only operates just before turn-on of the main switch. Therefore, This doesn"t affect the total circuit operation. The object of this paper is to make the linearized equivalent loss models, and to analyze the total losses by experiment. ZVT-PWM converter designed with 170-260[V] input, 400[V] 5[A] output, and 100[kHz] switching frequency is tested respectively with 500[W], 1[kW], 1.5[kW], and 2[kW] loads. The total losses in input 220[V], 2[kW] load are analyzed by using the linearized equivalent loss models. |