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Advances in Power Electronics
Volume 2012 (2012), Article ID 409671, 10 pages
http://dx.doi.org/10.1155/2012/409671
Research Article

FPGA-Based Fixed Point Implementation of a Real-Time Induction Motor Emulator

L.S.E., Ecole Nationale d'Ingénieur de Tunis, BP 37, 1002 Le Belvédère, Tunisia

Received 18 May 2012; Revised 12 September 2012; Accepted 18 September 2012

Academic Editor: Jose Pomilio

Copyright © 2012 L. Charaabi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper investigates the numerical issue of a discrete-time induction-motor emulator implementation. The stability analysis of the finite-word-length implementation shows a coupling between required word length and the sample rate. We propose specific guidelines to analyze this coupling and to estimate the required data word length for both signals and coefficients of the model. To respect algorithm requirements, an FPGA-based implementation was used for architecture development. The direct torque control is implemented to verify in real time the AC-motor emulator prototype.