The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper deals with fault tolerant control (FTC) for a high performance induction motor (IM) based on backstepping strategy implicitly tolerant to defects assuming the effect of the fault on the system (IM) can be modeled by an exogenous signal from a stable autonomous system. An additive term is added to the nominal offset and serves to control the effect of the defect (FTC aspect). This additive...
This paper presents an innovative way using the design of fault-tolerant control (FTC) systems for induction motor (IM). It will be shown how the nonlinear output regulation theory can be successfully adopted in order to design a regulator able to offset the effect of all possible faults which can occur in IM drives and, in doing so, also for faults tolerant control process. This regulator is designed...
This paper presents an improved direct torque control (DTC) based on fuzzy logic technique. Two major problems that are usually associated with DTC drives are the high torque ripple and switching frequency that varies with operating conditions. To overcome these problems, fuzzy controllers are proposed and associated with DTC scheme. The proposed approach is shown to be able to reduce the torque and...
This paper deals with an approach for the steady state analysis of Self Excited Induction Generator (SEIG). When an induction generator is used in an isolate operation, it operates in self-excitation mode. Therefore the advanced knowledge of the maximum excitation capacitor value is required. To find this capacitor value two non-linear equations have to be solved. Different numerical methods for solving...
This work addresses the analysis and the design of an adaptive fuzzy sliding-mode observer applied to vector control of an induction motor. The conception steps for the conventional sliding-mode speed observer (SMO) are laid down clearly. In this work, the drawbacks of SMO in terms of high observer gains and chattering phenomenon due of switching surface are overcome by merging of fuzzy logic with...
A robust vector control intended for a doubly fed induction motor (DFIM) mode is considered. The state-all-flux induction machine model with a flux orientation constraint is replaced by a simpler control model. The double-flux orientation leads to orthogonality between the stator and rotor fluxes, resulting in a linear and decoupled machine control and an optimal developed torque. The inner flux controllers...
The numerous qualities of squirrel cage Induction Machines (IM) enchance their use in industry. HOwever, various faults can occur, such as stator short-circuits and rotor failures. In the present paper, the effects of the rotor failures, such as broken rotor bars, are studied experimentally in function of the type of induction mtoor feeding and the load. The diagnosis technique, which is used, is...
This paper describes a simple but powerful and robust fuzzy tuning procedure for on-line adapting the scaling factors of a fuzzy logic controller (FLC) for the high performance drives induction motor (IM). This fuzzy adaptation does not require the knowledge of the system model. The improvements and the performances of the proposed controller based on IM drive are investigated and illustrated by some...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.