Effect of control method on impedance-based interactions in a buck converter

Vesti, Sanna Kaarina and Suntio, T. and Oliver Ramírez, Jesús Angel and Prieto López, Roberto and Cobos Márquez, José Antonio (2013). Effect of control method on impedance-based interactions in a buck converter. "IEEE Transactions on power electronics", v. 28 (n. 11); pp. 5311-5322. ISSN 0885-8993. https://doi.org/10.1109/TPEL.2013.2247422.

Description

Title: Effect of control method on impedance-based interactions in a buck converter
Author/s:
  • Vesti, Sanna Kaarina
  • Suntio, T.
  • Oliver Ramírez, Jesús Angel
  • Prieto López, Roberto
  • Cobos Márquez, José Antonio
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on power electronics
Date: 2013
ISSN: 0885-8993
Volume: 28
Subjects:
Freetext Keywords: Buck converter, dynamic behavior, minor-loop gain,source/load interactions, stability
Faculty: Centro de Electrónica Industrial (CEI) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

All the interconnected regulated systems are prone to impedance-based interactions making them sensitive to instability and transient-performance degradation. The applied control method affects significantly the characteristics of the converter in terms of sensitivity to different impedance interactions. This paper provides for the first time the whole set of impedance-type internal parameters and the formulas according to which the interaction sensitivity can be fully explained and analyzed. The formulation given in this paper can be utilized equally either based on measured frequency responses or on predicted analytic transfer functions. Usually, the distributed dc-dc systems are constructed by using ready-made power modules without having thorough knowledge on the actual power-stage and control-system designs. As a consequence, the interaction characterization has to be based on the frequency responses measureable via the input and output terminals. A buck converter with four different control methods is experimentally characterized in frequency domain to demonstrate the effect of control method on the interaction sensitivity. The presented analytical models are used to explain the phenomena behind the changes in the interaction sensitivity.

More information

Item ID: 29572
DC Identifier: http://oa.upm.es/29572/
OAI Identifier: oai:oa.upm.es:29572
DOI: 10.1109/TPEL.2013.2247422
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6461965
Deposited by: Memoria Investigacion
Deposited on: 27 Apr 2015 16:14
Last Modified: 27 Apr 2015 16:14
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