| Title |
Improved Modeling and Control of Boost-Flyback ConverterWith High Step-Up Voltage Ratio |
| Authors |
Sang-Uk Seo ; Kui-Jun Lee ; Rae-Young Kim ; Dong-Seok Hyun |
| DOI |
10.6113/TKPE/2012.17.1.67 |
| Keywords |
DC-DC converter; High step-up voltage ratio; Modeling and control; State-space method |
| Abstract |
This paper proposes the aggregated modeling and control of integated boost-flyback converter (IBFC) for understanding of dynamics characteristic and designing of relevant controller. The basic concept of the aggregated modeling is to substitute the boost or the flyback converter with an equivalent current source. Since each converter with equivalent current source corresponds to the basic boost and flyback converters, the overall mathematical process is significantly simplified for the modeling. Afterwards each result is combined to construct the complete model of the IBFC, and the relevant controller is designed through the achieved small-signal model. Simulation and experimental results show excellent agreement with the theoretical expectations. |