Table of Contents
International Journal of Vehicular Technology
Volume 2013, Article ID 718920, 9 pages
http://dx.doi.org/10.1155/2013/718920
Research Article

A 7-Level Single DC Source Cascaded H-Bridge Multilevel Inverter with a Modified DTC Scheme for Induction Motor-Based Electric Vehicle Propulsion

1University of Brest, EA 4325 LBMS, Kergoat Street, CS 93837, 29238 Brest Cedex 03, France
2Ecole Militaire Polytechnique, UER ELT, 16111 Algiers, Algeria

Received 1 September 2012; Revised 15 January 2013; Accepted 16 January 2013

Academic Editor: Lingyang Song

Copyright © 2013 Farid Khoucha et al. 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 presents a new hybrid cascaded H-bridge multilevel inverter motor drive DTC scheme for electric vehicles where each phase of the inverter can be implemented using a single DC source. Traditionally, each phase of the inverter requires DC source for output voltage levels. In this paper, a scheme is proposed that allows the use of a single DC source as the first DC source which would be available from batteries or fuel cells, with the remaining ( ) DC sources being capacitors. This scheme can simultaneously maintain the capacitors of DC voltage level and produce a nearly sinusoidal output voltage due to its high number of output levels. In this context, high performances and efficient torque and flux control are obtained, enabling a DTC solution for hybrid multilevel inverter powered induction motor drives intended for electric vehicle propulsion. Simulations and experiments show that the proposed multilevel inverter and control scheme are effective and very attractive for embedded systems such as automotive applications.