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 NORpie 2006 - Topic 06: Electrical Drives 
 You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2006 > NORpie 2006 - Topic 06: Electrical Drives 
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   Loss Minimization of Asynchronous Machine with Field Oriented Control 
 By B. S. Khaldi; A. Kouzou; S. Grouni; D. Boukhetala 
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Abstract: In this paper, the asynchronous machine with flux oriented control (FOC) is studied in order to minimize the electromagnetic losses of the machine using two families of loss minimization methods, the optimization of the control has been performed, firstly under variated rotor flux level, where experimental results are obtained, secondly by the optimization of the relation between the two components of the stator current.

 
   IRFOC Induction Motor with Rotor Time-Constant Adaptation Approach 
 By B. S. Khaldi; A. Kouzou; S. Grouni; D. Boukhetala 
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Abstract: This paper studied the induction machine with indirect rotor field oriented controlled (IRFOC) under the effect of the rotor time constant variation. Two adaptation algorithms are applied and compared, and then a new approach is proposed in this paper for its adaptation in light load applications.

 
   Modern Control of Induction Machines 
 By M. Krogsgaard; M. M. Bech; T. O. Andersen. 
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Abstract: An investigation of current state of the art in rotor field oriented control of induction machines is conducted. Different kinds of flux observers are analyzed with respect to parameter sensitivity and general performance. The evaluation is done by use of modern control theory and by testing in both a simulation model and in experiments. The potential of using different kinds of modern control strategies, like adaptive or sliding mode flux observers, are evaluated. The modern algorithms are all compared to standard methods.

 
   Implementation of Disturbance Observers in Speed Controlled Electric Drives 
 By M. Jokinen; M. Niemelä; J. Pyrhönen; A. Kosonen 
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Abstract: Increasing demands on the efficiency and quality of production have emphasized the need to develop better control systems for electric drives. A simple PID controller does not fulfill the performance requirements e.g. in motion control applications. A feed-forward function in the controller increases the bandwidth of the control loop. Load disturbances can be approximated with a disturbance observer using input-output measurements. In this study a structure of a disturbance observer is described and its performance is analyzed with simulations and measurements.

 
   Sensorless Control of IPMSM by Voltage Injection 
 By T. N. Matzen; M. M. Bech 
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Abstract: In this paper a sensorless discrete current control of an Interior Permanent Magnet Synchrouns Motor (IPMSM) by voltage injection is designed and tested. The whole controller is operating in the dq-frame and for this reason the rotor position is essential to know, to transform between the stationary frame and the rotor fixed dq-frame. To obtain the position even at standstill a sensorless scheme using voltage injection is added to the current controller.