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

Lookup NU author(s): Dr Tusitha Abeyasekera


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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.

Publication metadata

Author(s): Abeyasekera T; Bozhko S; Kolachny J

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 6th International Conference on Soft Computing, Mendel 2000

Year of Conference: 2000

Pages: 188-193

Publisher: Brno University of Technology

Library holdings: Search Newcastle University Library for this item

ISBN: 8021416092