| Abstract |
Increased usage of renewable energy sources has boosted the demand for power electronics converters.Indeed, the DC/DC flyback converter is nowadays frequently used in applications where isolation isrequired, due to its low component count, simple structure and high energy efficiency. One of the majorchallenges faced in a flyback converter is the excess voltage stress sensed by its semiconductor devices,because of the interrupted current flow through its transformer leakage inductances. In this paper, a high-efficient bidirectional flyback converter, operating in discontinuous conduction mode, is examined withan integrated RCDD snubber. Additionally, experimental comparison where the converter runs with atypical RCD and RCDD snubber network, is done. Experimental results on an IGBT-based bidirectionalflyback converter validate the applicability of the RCDD snubber demonstrating energy efficiency above90\%. Furthermore, the operation of the bidirectional converter with the employed snubber is thoroughlyanalysed and an appropriate mathematical analysis is conducted highlighting all the design specificationsof the proposed snubber. |
