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Forward converter regulator using controlled transformer

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5 Author(s)
Ning Sun ; Power Electron. Center, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; D. Y. Chen ; F. C. Lee ; P. M. Gradzki
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A new control scheme is proposed for a forward power converter regulator using a controlled transformer. Pulse width modulation (PWM) control is used to reset the control core of the controlled transformer. As a result, a low-cost ferrite core can be used for the controlled transformer to achieve good regulation and high efficiency. Overall efficiency of 82-86% is achieved in a 200 kHz, 500 W, 5 V output regulator. A PWM-controlled transformer regulator is particularly suited for high-output-current and/or high-output-voltage postregulator applications

Published in:

IEEE Transactions on Power Electronics  (Volume:11 ,  Issue: 2 )