Title :
A buck quadratic PWM soft-switching converter using a single active switch
Author :
Barbosa, Lucio Dos Reis ; Vieira, Joao Batista, Jr. ; De Freitas, Luiz Carlos ; Vilela, Márcio da Silva ; Farias, Valdeir José
Author_Institution :
Dept. de Engenharia Eletrica, Univ. Fed. Uberlandia, Brazil
fDate :
5/1/1999 12:00:00 AM
Abstract :
High-switching frequency associated with soft commutation techniques is a trend in switching converters. Following this trend, a buck pulsewidth modulation (PWM) converter is presented. The DC voltage conversion ratio of this converter has a quadratic dependence on duty cycle, providing a large stepdown. This new buck quadratic PWM soft-single-switched converter, having only a single active switch, provides a high efficient operating condition for a 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
Keywords :
PWM power convertors; commutation; switching circuits; DC voltage conversion ratio; buck pulsewidth modulation converter; buck quadratic PWM soft-switching converter; high-switching frequency; quadratic dependence; single active switch; soft commutation techniques; Analytical models; Buck converters; Equations; Frequency conversion; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Switching frequency; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
