L. Barbosa, J. Vieira, L. D. de Freitas, M. Vilela, V. J. Farias
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A buck quadratic PWM soft-switching converter using a single active switch
High switching frequency associated to soft commutation techniques is a trend in switching converters. Following this trend a buck PWM converter is presented. The DC voltage conversion ratio of this converter has a quadratic dependence on duty-cycle, providing a large step-down. This new buck quadratic PWM soft-single-switched converter, having only a single active switch, provides high efficient operating condition for wide load range at high switching frequency. In order to illustrate the operating principle of this new converter a detailed study, including theoretical analysis, relevant equations and simulation and experimental results is carried out.
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