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A 5-level PFC topology with fault-diagnostic and fault-tolerant capability is proposed and compared to known structures. It is derived from a 3-level non differential double-boost PFC including fly-cap cells. The series-connection of the two low-voltage switching-cells is decoupled by a single flying capacitor that provides a direct fault-tolerant capability and a post-failure operation increasing...
Decades of research have seen single-phase boost-type PWM converters be employed as front-end PFC rectifiers in commercial power supplies. The benefits of employing this technology to comply with power quality standards while assuring high efficiency and low volume and weight have been observed. However, this work shows that further efforts can be driven into new topologies. In this context, a new...
In this paper, a novel common-source type boost-forward single-stage PFC topology was proposed. By adding a second wind to the transformer, and using two active-clamp switches connected in common-source type, an active-clamp ZVS (zero voltage switching) could be obtained with a simple PWM control and output voltage feedback. The proposed topology was experimentally verified through the construction...
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