Energy- and flatness-based control of DC-DC converters with nonlinear load
Authors
Juan Tomassini, Alejandro Donaire, Sergio Junco
Abstract
This paper presents a passivity-based controller design (PBC) aimed at stabilizing DC-DC power electronic converters with nonlinear dissipative loads. The converters considered in this work are the buck, the boost and the buck-boost. First, Bond Graph technique is used to obtain the flat output of each converter model. The controller is designed within the port-Hamiltonian (pH) framework, ensuring stability and other desired closed-loop properties. To this aim a desired closedloop dynamics in pH form with a quadratic storage function and a flat-output-inspired change of variables are proposed, which are common to the three converters. The controllers that render the closed-loop dynamics in the desired pH form are obtained via model matching. This design has two major advantages. The first is that the so-called matching equation can be solved by construction; thus, the cumbersome task of solving partial differential equations is avoided. The second advantage is that in all the converters treated the closed-loop dynamics is linear; thus, the performance of the control system can be easily determined via the tuning of the eigenvalues of the closed-loop evolution matrix. The performance is assessed through digital simulation.
Citation
- Journal: Proceedings of the 11th International Conference on Integrated Modeling and Analysis in Applied Control and Automation (IMAACA 2018)
- Year: 2018
- Volume:
- Issue:
- Pages: 34–42
- Publisher: CAL-TEK srl
- DOI: 10.46354/i3m.2018.imaaca.005
BibTeX
@inproceedings{Tomassini_2018,
series={IMAACA 2018},
title={{Energy- and flatness-based control of DC-DC converters with nonlinear load}},
DOI={10.46354/i3m.2018.imaaca.005},
booktitle={{Proceedings of the 11th International Conference on Integrated Modeling and Analysis in Applied Control and Automation (IMAACA 2018)}},
publisher={CAL-TEK srl},
author={Tomassini, Juan and Donaire, Alejandro and Junco, Sergio},
year={2018},
pages={34--42},
collection={IMAACA 2018}
}