Record Details     « Return to search results       Brief Record Full Record MARC Record     Bibliographic Data Control Number UPD-00106799543 Date and Time of Latest Transaction 20090807103432.0 Cataloging Source DENGII Language Code eng Local Call Number LG 995 2009 E64 A88 Main Entry - Personal Name Asuncion, Arlaindo V. Title Statement Reducing output voltage undershoot of a buck in a DCM to CCM transition using non-linear control / by Arlaindo V. Asuncion Physical Description ix, 111 leaves : ill. (some col.) Summary, Etc. A Buck fed Full Bridge Converter is a Switch Mode Power Supply Topology. This topology has a PWM controlled Buck Converter front end feeding a Full Bridge Converter that is operating at a maximum fixed duty cycle. The controller regulates the output voltage of the topology by adjusting the Buck Converter duty cycle. Its advantages over other topologies are 1) High Efficiency, 2) High Packaging Density and 3) Low Complexity. One disadvantage of using this topology is that it contains an equivalent double L-C output filter. These are the buck L-C filter and the Full Bridge L-C filter. This configuration will typically have a lower bandwidth as compared to a buck that contains just a single L-C output filter. The lower bandwidth becomes a problem when the required dynamic load transitions between the continuous and the discontinuous mode operation of the Buck Stage. This work evaluates a proposed non-linear control method to improve the dynamic load response of a 12V/700W Buck fed Full Bridge Converter used for a Server PSU. A Freescale 56F8013 DSP was used to evaluate the proposed Non-Linear Control. The Proposed Non-linear Control is compared to an Analog Linear Control and Digital Linear Control by testing the SMPS output voltage transients during load current steps. Compared with the Analog Linear Controller, the proposed control was able to reduce the output voltage undershoot from 18% down to 10% of output voltage set point during a load current step up. Compared with the Digital Linear Controller, the proposed control was able to reduce the output voltage undershoot from 20% down to 10% of the output voltage set point during a load current step up Subject Added Entry - Topical Term Switching power supplies   Power electronics Textual Physical Form Designator Thesis Collection Category FI Location UP DENG-II LG 995 2009 E64 A88 E200000621G Room-Use Only 2009 E2-495TG Collection Category UP           Physical Location University of the Philippines Diliman: College of Engineering Library II LG 995 2009 E64 / A88           Digital Copy Not Available          Add to Book Cart  |   Download MARC