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Advances in Power Electronics
Volume 2013 (2013), Article ID 371842, 8 pages
Research Article

Simple Hybrid Model for Efficiency Optimization of Induction Motor Drives with Its Experimental Validation

1Faculty of Electrical Engineering, University of Banja Luka, Patre 5, 78000 Banja Luka, Bosnia and Herzegovina
2Faculty of Mechanical Engineering, University of Banja Luka, Bulevar Stepe Stepanovica 75, 78000 Banja Luka, Bosnia and Herzegovina

Received 28 December 2012; Revised 14 February 2013; Accepted 14 February 2013

Academic Editor: Jose Pomilio

Copyright © 2013 Branko Blanuša and Bojan Knezevic. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


New hybrid model for efficiency optimization of induction motor drives (IMD) is presented in this paper. It combines two strategies for efficiency optimization: loss model control and search control. Search control technique is used in a steady state of drive and loss model during transient processes. As a result, power and energy losses are reduced, especially when load torque is significant less related to its rated value. Also, this hybrid method gives fast convergence to operating point of minimal power losses and shows negligible sensitivity to motor parameter changes regarding other published optimization strategies. This model is implemented in vector control induction motor drive. Simulations and experimental tests are performed. Results are presented in this paper.