A new soft-commutated full-bridge DC-DC convertor with low conduction loss

This paper introduces a new power converter circuit intended to be used in the design of high power supplies, in the place of the well-known full-bridge zero-voltage-switching pulse-width-modulated (FB-ZVS-PWM) converter. Besides operating with soft commutation, and modulated by pulse width at constant frequency, this new converter subjects the power transistor to lower RMS current stress than the FB-ZVS-PWM one. Circuit operation analysis, design procedure and example along with experimental results are presented in this paper.<
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