Induction Machine Characteristics Control in Field Weakening Region for Propulsion Application

Abstract

AbstractStarting and climbing at low speeds require high torque and almost power constant at high speeds entail for electric vehicle applications. In DC series motor, the characteristic for electric vehicle application is achieved through its construction and by variable DC voltage. Induction motor is considered an ideal candidate for electric vehicle application due to its features such as reliability, ruggedness, lightweight, low cost, and less maintenance. This paper put forward a novel approach to obtain better torque-speed characteristics of Induction machine as nearly as that of DC series machine for electric vehicle application. A control strategy is built-up for Space Vector Modulated (SVM) inverter-fed Field Oriented Control (FOC) of induction machine in Field Weakening (FW) province. For electric vehicle applications at high speed, it is enviable to hold on to utmost torque capacity in FW region. Modification in design has to be carried out to change the behavior of Induction motor along with sliding mode controller to suit propulsion requirements using MATLAB/Simulink.KeywordsSpace vector modulationField oriented controlSliding mode ControlField weakening