الفهرس 
CHAPTER 1: SPEED-SENSORLESS CONTROL OF INDUCTIONOnly 14 pages are availabe for public view
 |  | from | 173 |  |  |
| | | from | 173 | | |
Abstract
Recently, the development of speed estimation methods for sensorless control of electrical drives has found great interest among research community. from the drive system’s point of view, an induction motor drive without direct speed sensor and the associated measurement cables has the features of reduced hardware complexity, low cost, high reliability, better noise immunity and less maintenance requirements. For these reasons, great efforts are made to develop a speed sensorless induction motor drive. Among the different speed estimation methods of sensorless induction motor drives, Sliding Mode Observer (SMO) is considered a premium. It has gained wide attention owing to its simple design, easy implementation, fast dynamic response and robustness to parameter variations and load disturbances. These properties are essential for state estimation of a nonlinear plant such as speed estimation of induction motor drives. In spite of the positive features of SMO, it is basically discontinuous and suffers from a serious chatter drawback. This is attributed to the inherent chattering problem associated with Variable Structure Control (VSC) on which SMO is based.