چكيده به لاتين
Three phase induction motors are one of the most important tools in the industry with a variety of applications and their timely detection of its fault and its control at fault time in a way that minimizes damage and also allows operation during fault. One of the applications of the induction motor is the use of these motors in the railway industry. Due to the importance of safety of rail travel and the need to adjust the train's time, troubleshooting and timely diagnosis of faults in these motors is important. One of the common faults in induction motors is the inter-turn short-circuit. This fault is important because do not detection timely can increase the number of short-circuit loops and cause large losses and exorbitant costs. In this thesis, an active approach to designing a fault tolerance controller is presented to provide a three-phase induction traction motor stator compensation short circuit compensation. The structure of this system consists of three main parts: an exponential observer with an unknown input that detections the fault. By modeling the nonlinear equations of the induction motor into a linear time-varying system, nonlinear and linear time-varying observers are presented. Also, with the proposed observer, the value of this fault is estimated. In the following, considering the importance of the time of arrival of the train to the station, at the end, using the estimate obtained from the exponential observation, compensating signals will be made by the controller to compensate for the inter-turn short-circuit fault. The function of the various components of the fault-tolerant system, including detector, fatlt estimator and controller, is represented using simulation results.
