A Soft-Switched Full-Bridge Single-Stage AC-to-DC Converter With Low-Line-Current Harmonic Distortion
Bhat, A.K.S.
Venkatraman, R.
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug. 2005
Volume: 52,
Issue: 4
On page(s): 1109- 1116
ISSN: 0278-0046
Digital Object Identifier: 10.1109/TIE.2005.851639
Current Version Published: 2005-08-01
Abstract
A single-phase high-frequency transformer-isolated soft-switching single-stage ac-to-dc converter with low-line-current distortion is presented. The circuit configuration is obtained by integrating two discontinuous current mode (DCM) boost converters with a DCM full-bridge buck converter. The zero-voltage switching for the top switches is achieved automatically, whereas bottom switches are aided by zero-voltage transition circuits. The output voltage is regulated by duty-cycle control at constant switching frequency. The intervals of operation and steady-state analysis are presented. A systematic design procedure is presented with a 1-kW converter design example. PSPICE simulation and experimental results obtained from a 1-kW laboratory prototype are presented for a wide variation in line and load conditions.
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