25kW 3-phase unity power factor buck boost rectifier with wide input and output range for pulse load applications

Comparison and Evaluation of Power Factor Correction Topologies for Industrial Applications

“…3) Buck-Boost Topologies [12,13] This family of converters offers buck-boost capability, meaning that the output voltage has no upper or lower limit (Figure 9). However, some topologies may suffer low efficiency, due to the large number of semiconductor switches required for buck-boost operation, and may be unsuitable for high power applications.…”

Innovative waste heat recovery systems in rotorcrafts

“…The specifications that all candidate converter topologies should meet are: good pfc, high power density and efficiency, high reliability and low electromagnetic interference. Though, as in the previous system, there is a great number of rectifier topologies, only the ones that fulfill the above criteria are selected to be studied, which are: the cascade connection of the boost rectifier [20], [21] in series with a dc/dc buck converter, the cascade connection of the buck rectifier [22] in series with a dc/dc boost converter, the buck-boost pfc rectifier [23] and the parallel active filter [24]. The advantage of the last candidate topology compared to the previous ones is that the PAF handles only a fraction of the energy, because it acts as a compensator.…”