Hybrid switched capacitor three winding coupled inductor high step-up DC-DC converter

Abstract

Switched capacitor cells have been studied in recent years. These approaches allow different new topologies to be generated. One such technique is the hybrid converter, where a coupled inductor and switched capacitor can be combined. Thus, in this paper, a hybrid topology is proposed that combines a three-winding coupled inductor with switched capacitor cells, with advantages such as simplicity of operation, high efficiency, low current stress, soft switching (ZCS), the possibility of reducing the capacitor value, low voltage stress on the components. To demonstrate that the converter has good performance, two prototypes were built considering different values of the duty cycle and turns ratio of coupled inductor. From there, the maximum efficiency achieves is 97.54 % at 125 W.