Bifurcation phenomena and chaos in a PWM based cascade control electric drive

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  2. Dr Tusitha Abeyasekera
Author(s)Abeyasekera T; Bozhko S; Kolachny J
Publication type Conference Proceedings (inc. Abstract)
Conference Name6th International Conference on Soft Computing, Mendel 2000
Conference LocationCzech Republic
Year of Conference2000
Legacy Date7-9 July 2000
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It has been demonstrated previously that some switched mode power electronic circuits such as buck and boost converters, pulse-width-modulated converters etc can exhibit chaos for significantly large ranges of parameter values. Such power electronic devices are often used as power-conversion units in modern electrical drives. Therefore, it is interesting to study the possibility of chaotic behavior in closed-loop electrical drives, and its influence on drive performance. In this paper we present our results in theoretical analysis of bifurcation and chaos in a PWM-based cascade control electrical drive. The paper also presents the well-known phenomena of unpredicted occurrence of high levels of torque pulsations and jitter, explained through bifurcation and chaos. The corresponding phase orbits on the speed-torque plane and bifurcation diagrams are presented. These results can also be useful for electromechanical engineers.
PublisherBrno University of Technology
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