Energy shaping control for buck-boost converters with unknown constant power load

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Title: Energy shaping control for buck-boost converters with unknown constant power load
Authors: He, W
Soriano-Rangel, CA
Ortega, R
Astolfi, A
Mantilla-David, F
Li, S
Item Type: Journal Article
Abstract: We develop in this paper an adaptive passivity-based controller for output voltage regulation of DC–DC buck–boost converter with an unknown constant power load. This control problem is theoretically challenging since the average model of the converter is a bilinear second order system that, due to the presence of the constant power load, is non-minimum phase with respect to both states. A solution to the problem was recently reported in Wei et al. (2017), however, the resulting control law is extremely complicated to be of practical interest. The purpose of this paper is to present a new, significantly simpler, controller that can be easily implemented in applications. The key modifications introduced in the new design are the use of a change of coordinates and a partial linearization that transform the system into a cascade form, to which an adaptive energy-shaping controller is applied. Another advantage of the proposed controller, besides its simplicity, is that it is amenable for the addition of an outer-loop PI that improves its transient and disturbance rejection performances. Simulations and experimental results are provided to assess the improved performance of the proposed controller.
Issue Date: 1-May-2018
Date of Acceptance: 9-Feb-2018
ISSN: 0967-0661
Start Page: 33
End Page: 43
Volume: 74
Copyright Statement: © 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: 664639
Keywords: Science & Technology
Automation & Control Systems
Engineering, Electrical & Electronic
Buck boost converter
Constant power load
Interconnection and damping assignment passivity-basedcontrol
Immersion and invariance
0102 Applied Mathematics
0906 Electrical And Electronic Engineering
0913 Mechanical Engineering
Industrial Engineering & Automation
Publication Status: Published
Online Publication Date: 2018-03-23
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering

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