Family of single‐switch quasi‐resonant converters with reduced inductor size. Issue 10 (1st October 2014)

• Record Type: Journal Article
• Authors: Sharifi, Saead; Jabbari, Masoud
• Is Part Of: IET power electronics. Volume 7:Issue 10(2014)
• Page Start: 2544
• Page End: 2554
• Publication Date: 2014-10-01
• Subjects: capacitors -- zero voltage switching -- zero current switching -- inductors -- resonant power convertors; frequency 185 kHz -- power 200 W -- CCM -- continuous conduction mode -- discontinuous conduction mode -- reverse recovery problem -- ZCS -- zero‐current switching -- resonant capacitor -- single‐switch soft‐switching converter -- small size inductor -- single‐switch quasiresonant converter; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2013.0615
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : This study presents a family of single‐switch soft‐switching converters with 18 new topologies. The passive elements include two relatively small inductors and one resonant capacitor. The switch can be half‐wave or full‐wave which turns on and turns off at zero‐current switching (ZCS). The diode is turned off at ZCS and thus its reverse recovery problem is obviated. The converters operate at discontinuous conduction mode (DCM) and continuous conduction mode (CCM) depending on the load current. For the full‐wave switch, an almost constant switching frequency is attained at CCM. The presented experimental results from a 200 W/185 kHz laboratory prototype confirm the presented theoretical analysis. For this prototype, the switching frequency variation at CCM is only 70 Hz/W.