Comparison of alternative equivalent circuits of induction motor with real machine data

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Abstract

The algorithms based on separated control of the motor flux and torque is used in order to gain the maximum performance from the induction machine. To push the efficiency and dynamics limits of the IM to its limits mostly FOC or DTC control strategies are used. Both are based on the knowledge of the hardly measurable variable-machine flux. To obtain the information about inner machine flux models based on the machine equivalent circuit are mostly used. Therefore the accuracy of the equivalent circuits has direct influence on the accuracy of the machine control. To reduce the complexity of the mathematical model the resistances and inductances are concentrated to one component and three phase winding is assumed to be symmetrical. In order to design control strategy for the induction motor, system equations and equivalent circuit must be established at first. This paper examines and compares some of the issues of adequate machine modeling and attempts to provide a firmer basis for selection of an appropriate model and to confirm or disprove the equivalence of different approaches. The results of the IM model run up are then compared to the results obtained from the measurements on the real machine and the equivalency is discussed..

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Bradna, J., Bauer, J., Fligl, S., & Hlinovsky, V. (2012). Comparison of alternative equivalent circuits of induction motor with real machine data. In Mechanisms and Machine Science (Vol. 8, pp. 13–19). Springer Netherlands. https://doi.org/10.1007/978-94-007-5125-5_2

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