Soft‐switching DC–DC Cuk converter operating in discontinuous‐capacitor‐voltage mode. Issue 13 (1st August 2017)

• Record Type: Journal Article
• Authors: Poorali, Behzad; Adib, Ehsan; Farzanehfard, Hosein
• Is Part Of: IET power electronics. Volume 10:Issue 13(2017)
• Page Start: 1679
• Page End: 1686
• Publication Date: 2017-08-01
• Subjects: DC‐DC power convertors -- switching convertors -- zero voltage switching -- zero current switching; soft‐switching DC‐DC Cuk converter -- discontinuous‐capacitor‐voltage mode -- semiconductor devices -- passive components -- extra winding -- auxiliary diode -- auxiliary inductor -- switching losses -- zero‐current‐switching -- zero‐voltage‐switching -- leakage inductance energy -- current stress -- switch current -- power 100 W -- voltage ‐24 V -- voltage 150 V; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2016.0513
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : This paper proposes an improved topology for the conventional DC–DC Cuk converter operating in discontinuous‐capacitor‐voltage mode which provides soft‐switching conditions for all the semiconductor devices. The improved topology has only three passive components in addition to the elements of the conventional counterpart, an extra winding, an auxiliary diode, and an auxiliary inductor. Therefore, without using any extra active switch, the soft‐switching operation is attained and the switching losses are reduced. In the proposed converter, the power switch turns on and off under zero‐current‐switching and zero‐voltage‐switching conditions, respectively. In addition, the switch current is reduced in comparison with the conventional Cuk converter resulting in lower current stress. Also, the leakage inductance energy is recycled and continuity of the input and output currents are preserved. It is shown that reduction of the switch current and soft‐switching operation improves the overall efficiency. Analysis of the proposed converter together with the design guidelines is presented. Moreover, the experimental results of a 100 W prototype producing −24 V from 150 V input voltage are provided and compared with the results obtained from a similar prototype of the conventional Cuk converter.