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Mathematical Problems in Engineering
Volume 2014, Article ID 386174, 10 pages
http://dx.doi.org/10.1155/2014/386174
Research Article

A High-Performance Control Method of Constant -Controlled Induction Motor Drives for Electric Vehicles

Automotive Engineering Research Institute, Jiangsu University, Zhenjiang 212013, China

Received 21 September 2013; Revised 12 December 2013; Accepted 12 December 2013; Published 21 January 2014

Academic Editor: Hui Zhang

Copyright © 2014 Long Chen 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

A three-phase induction motor used as a propulsion system for the electric vehicle (EV) is a nonlinear, multi-input multi-output, and strong coupling system. For such a complicated model system with unmeasured and unavoidable disturbances, as well as parameter variations, the conventional vector control method cannot meet the demands of high-performance control. Therefore, a novel control strategy named least squares support vector machines (LSSVM) inverse control is presented in the paper. Invertibility of the induction motor in the constant control mode is proved to confirm its feasibility. The LSSVM inverse is composed of an LSSVM approximating the nonlinear mapping of the induction motor and two integrators. The inverse model of the constant -controlled induction motor drive is obtained by using LSSVM, and then the optimal parameters of LSSVM are determined automatically by applying a modified particle swarm optimization (MPSO). Cascading the LSSVM inverse with the induction motor drive system, the pseudolinear system can be obtained. Thus, it is easy to design the closed-loop linear regulator. The simulation results verify the effectiveness of the proposed method.