%0 Journal Article
%T A High-Performance Control Method of Constant -Controlled Induction Motor Drives for Electric Vehicles
%A Long Chen
%A Xiaodong Sun
%A Haobin Jiang
%A Xing Xu
%J Mathematical Problems in Engineering
%D 2014
%I Hindawi Publishing Corporation
%R 10.1155/2014/386174
%X 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. 1. Introduction Nowadays, some serious problems such as environment depravation and air pollution are becoming more and more serious, due to the rapid development of the global economy. Electric vehicles (EVs), including fuel cell-powered vehicle and hybrid electric vehicles, are being currently researched and their practicalities are increasingly capturing many countries¡¯ eyes, since they are a way to solve these problems that are tied to exhaust gas-emission and energy-saving issues [1¨C3]. By converting electrical energy into mechanical energy, a motor can propel a vehicle [4, 5]. Compared with the combustion engines, the motors have some main advantages in terms of power density, conversion efficiency, low-speed torque characteristics, and so on [6¨C9]. In addition, when the motor operates in the braking mode, it can convert the mechanical energy back to electrical energy [10, 11]. Aforementioned characteristics of the motors make the electric drive more energy efficient, more powerful, and more compact. With the rapid development of power electronics, information technology, and the revolution in motor control, the EV technologies are being quickly progressed. Among EV key technologies, selection of a suitable drive, optimum design of the motor topologies, and optimal control strategies are the major factors [12, 13]. In general, permanent-magnet synchronous motors (PMSMs) have been
%U http://www.hindawi.com/journals/mpe/2014/386174/