Analysis of the effect of modulation delays on the size of the output capacitor

Cortés González, Jorge and Svikovic, Vladimir and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Cobos Marquez, Jose Antonio (2014). Analysis of the effect of modulation delays on the size of the output capacitor. In: "16th European Conference on Power Electronics and Applications (EPE'14-ECCE Europe)", 26/08/2014 - 28/08/2014, Lappeenranta, Finland. pp. 1-10. https://doi.org/10.1109/EPE.2014.6910947.

Description

Title: Analysis of the effect of modulation delays on the size of the output capacitor
Author/s:
  • Cortés González, Jorge
  • Svikovic, Vladimir
  • Alou Cervera, Pedro
  • Oliver Ramírez, Jesús Angel
  • Cobos Marquez, Jose Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: 16th European Conference on Power Electronics and Applications (EPE'14-ECCE Europe)
Event Dates: 26/08/2014 - 28/08/2014
Event Location: Lappeenranta, Finland
Title of Book: 16th European Conference on Power Electronics and Applications (EPE'14-ECCE Europe)
Date: 2014
Subjects:
Freetext Keywords: Converter Control, Pulse Width Modulation (PWM), Integrated Circuit (IC)
Faculty: Centro de Electrónica Industrial (CEI) (UPM)
Department: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Constant frequency (PWM), constant on-time (COT) and constant off-time modulations exhibit inherent delays where the controller is unable to respond instantaneously. These delays can increase the required size of the output capacitor to meet dynamic requirements in applications with high demanding load such as the supply of microprocessors. This paper analyzes the minimum required output filter (output inductor and output capacitor) to meet a given specification and quantifies the effect that different modulations have in the minimum size of the output capacitor. The paper also shows a novel technique to mitigate the delays of the modulations by means of synchronizing the load step with the clock of the modulation. This technique is applicable to most of controllers as it only acts on the modulator.

More information

Item ID: 36310
DC Identifier: http://oa.upm.es/36310/
OAI Identifier: oai:oa.upm.es:36310
DOI: 10.1109/EPE.2014.6910947
Official URL: http://ieeexplore.ieee.org/document/6910947/
Deposited by: Memoria Investigacion
Deposited on: 28 Mar 2017 17:56
Last Modified: 28 Mar 2017 17:56
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