High Efficiency Interleaved Power Electronics Converter for wide operating power range

Abstract

The paper focuses on a new driving strategy for improving the efficiency of power converters even if they are not used at there nominal power. The converters are using an output filtering structure with magnetical coupling. These filtering structures are usually employed to minimize in a significant way the mass of the converters. These filters are normally sized to work with a fixed number of phases. To optimize the magnetic components, it is necessary to take into account some physical constraint, as the iron sections of the magnetic circuits and saturation problems. These problems are tricky, especially in case of the variation of the number of phase. A new control strategy is presented for interleaved and multilevel structure. Finally converter simulation results are compared with the experimental results. A 1.6 kW (115 V) converter realization is presented.