A Four-Phase Forward Converter Using an Integrated Transformer

• Published in: IEEE transactions on industrial electronics (1982) Vol. 55; no. 2; pp. 817 - 831
• Main Authors: Wong Leung-Pong, Lee Yim-Shu, Chow, M.H.L., Cheng, D.K.-W.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Circuit simulation; Circuit topology; Computer simulation; Converter with small output-current ripple; Converters; Costs; Criteria; Equivalence; Gyrators; integrated magnetics; integrated transformer; interleaved four-phase forward converter; Magnetic analysis; Magnetic circuits; Magnetic cores; Mathematical models; regenerative LC snubber circuit; Ripples; Snubbers; Switching converters; Transformers; Transient response; Transient responses; integrated transformer; interleaved four-phase forward converter; regenerate LC snubber circuit; integrated magnetics; Converter with small output-current ripple
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2007.911910

The interleaved converter topology has attractive features that include high output current, small output-current ripple, and fast transient response. In this paper, an interleaved four-phase forward converter using an integrated transformer is proposed for telecommunication and computer applications. The proposed converter requires only one integrated transformer instead of four step-down transformers. The z-parameter (gyrator) model and the equivalent-circuit model of the integrated transformer are derived. The circuit operation and design criteria are described. Theoretical analyses are verified by simulated and experimental results.