Control and Measuring Method for Three Phase Induction Motor with Improved Efficiency

Emad Ahmed Hussein Abdelkarim
This thesis deals with improving and measuring the efficiency of variable speed induction motor drives. Optimized efficiency is achieved by adapting the magnetizing level in the motor according to the load percentage. The thesis investigates on the efficiency improvement of squirrel cage induction motors fed by SVM-VSI, by using the loss model method. A new expression for the optimal air gap flux is calculated from a detailed loss model. This loss model comprises the copper...
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