Model-free control of dc/dc converters

Loïc Michel (1) , Cédric Join (2, 3) , Michel Fliess (2, 4) , Pierre Sicard (1) , Ahmed Chériti (1)

1 GEGI - Département de Génie Electrique et Génie Informatique [UQTR]
2 ALIEN - Algebra for Digital Identification and Estimation
3 CRAN - Centre de Recherche en Automatique de Nancy
4 LIX - Laboratoire d'informatique de l'École polytechnique [Palaiseau]

A new "model-free" control methodology is applied for the first time to power converters, and in particular to a buck converter, and to a Cuk converter. We evaluate its performances regarding load and supply variations. Our approach, which utilizes "intelligent" PI controllers, does not require any converter identification while ensuring the stability and the robustness of the control synthesis. Simulation and experimental results show that, with a simple control structure, insensitivity to power supply fluctuations and to large load variations is ensured.

Mots clés: dc/dc converters; buck converters; Cuk converters; model-free control; intelligent PI controllers; numerical differentiation

Domaines: Automatique; Ingénierie, finance et science [cs.CE]; Optimisation et contrôle [math.OC]

Loïc Michel, Cédric Join, Michel Fliess, Pierre Sicard, Ahmed Chériti. Model-free control of dc/dc converters. 12th IEEE Workshop on Control and Modeling for Power Electronics (COMPEL), Jun 2010, Boulder, Colorado, United States. pp.CDROM, ⟨10.1109/COMPEL.2010.5562385⟩. ⟨inria-00495776⟩