Single‐core soft‐switching high step‐up three‐level boost converter with active clamp. Issue 14 (1st November 2016)

• Record Type: Journal Article
• Authors: Poorali, Behzad; Moradmand Jazi, Hamed; Adib, Ehsan
• Is Part Of: IET power electronics. Volume 9:Issue 14(2016)
• Page Start: 2692
• Page End: 2699
• Publication Date: 2016-11-01
• Subjects: zero current switching -- zero voltage switching -- switching convertors -- photovoltaic power systems -- magnetic cores -- power semiconductor devices; single‐core soft‐switching high step‐up three‐level boost converter -- voltage gains -- photovoltaic applications -- three‐level structure -- voltage stresses -- semiconductor devices -- active clamp circuit -- switching losses -- auxiliary switch -- leakage energy -- voltage spikes elimination -- magnetic core -- converter performance -- power 200 W -- voltage 40 V -- voltage 400 V; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2016.0134
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : In this study, a new three‐level boost converter is introduced which has high voltage gains suitable for photovoltaic applications. Three‐level structure has the advantage of low voltage stresses of the switches and diodes. In the proposed converter, semiconductor devices operate under soft‐switching conditions which results in low switching losses. It utilises an active clamp circuit with one auxiliary switch to absorb the leakage energy. Therefore, elimination of the voltage spikes across the switches as well as efficiency improvement is achieved. On the other hand, the proposed converter has one magnetic core, and consequently, reduced size. Operating principles of the proposed converter along with its theoretical analysis are presented. Experimental results of a 200 W laboratory prototype for voltage conversion of 40 V/400 V are provided in order to verify the proposed converter performance.