The European Physical Journal Applied Physics
- The European Physical Journal Applied Physics / Volume 33 / Issue 01 / January 2006, pp 23-33
- © EDP Sciences, 2006
- Published online by Cambridge University Press: 07 February 2011
- DOI: http://dx.doi.org/10.1051/epjap:2006004 (About DOI)
Physics of Energy Generation, Conversion and Storage
Direct torque control with an optimized observer for multi-machine systems
J. Belhadja1a2, I. S. Belkhodjaa1, M. Davida3 and B. de Fornela3
Laboratoire des Systèmes Électriques, National Engineer School of Tunis, LSE-ENIT, BP 37, Le Belvédère, 1002 Tunis, Tunisia
ESSTT-GE, BP 56, Monteleury, 1008 Tunis, Tunisia
Laboratoire d'Électrotechnique et d'Électronique Industrielle (LEEI), UMR-CNRS, 2 rue Camichel, BP 7122, 31071 Toulouse Cedex 7, France
Abstract
The first purpose of this work is to design a new observation technique for
the Direct Torque Control (DTC). We put emphasis on robustness especially at
very low speed, which represents the basic problem of the DTC operating, and
on the optimization of the time computing. The reduced order observer is
defined by decoupling the full order one in
and
axis. The
second basic aim of this paper is to apply the DTC strategy to multi-machine
multi-inverter industrial systems. Speed and tension controls are designed;
their performances and parameter robustness are analyzed and compared with
those obtained with a Flux Oriented Control (FOC). Mechanical and electrical
couplings constitute the principal operation difficulty of these systems
mainly when one of the machines is perturbed.
(Received March 30 2004)
(Revised July 28 2005)
(Accepted September 29 2005)
(Online publication January 18 2006)
PACS:
- 84.30.Jc – Power electronics; power supply circuits;
- 84.50.+d – Electric motors
