Abstract
The single-phase PFC converters are used for a lot of applications, such as air conditioners, heat pumps, etc. Its application range is expected to expand such as battery charger for EVs, PHEVs and home strages. However, the single-phase PFC converter has output voltage ripple caused by supply power ripple. It is a one of demerit of single-phase PFC converters. Thus, the authors have proposed a ripple reducing control method which can apply to buck, buck-boost and series-type buck/boost converters. However, the ripple reducing control method has not applied to the parallel-type buck/boost converter yet. Therefore the authors have applied this method to the parallel-type buck/boost converter. In this paper, the switching losses in three type converters, the Parallel type buck/boost, the buck and the series-type buck/boost, are evaluated with a simple analytical analysis and computer simulation and compared.
