Interleaved three-phase forward converter using integrated transformer
Leung-Pong Wong
Cheng, D.K.-W.
Chow, M.H.L.
Yim-Shu Lee
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., China;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct. 2005
Volume: 52,
Issue: 5
On page(s): 1246- 1260
ISSN: 0278-0046
INSPEC Accession Number: 8590518
Digital Object Identifier: 10.1109/TIE.2005.855680
Current Version Published: 2005-09-26
Abstract
An interleaved three-phase forward converter using an integrated transformer is proposed in this paper. This type of converter has the attractive features of flexible voltage conversion ratio, high output current (due to the parallel connection of outputs), near-zero output-current ripple (due to the output-current-ripple cancellation), fast transient response (due to the small effective output-filtering inductance), and is particularly suitable for high-output-current and low-output-voltage applications such as telecommunication and computer systems. The integrated transformer of the proposed converter consists of three step-down transformers on a single magnetic core. The z-parameter (gyrator) model and the equivalent-circuit model of the integrated transformer are derived. Based on the equivalent-circuit model, the principle of operation of the proposed converter is explained. The analysis and design criteria of the basic circuit, the operation of the regenerative LC snubber circuit, the simulation, and experimental verification are also described.
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