Abstract
The present work proposes a weighting factor less predictive torque control (PTC) scheme for a speed sensorless induction motor (IM) drive. Conventional PTC schemes employ single objective function with multi variant user defined constraints normalized by different weighting factors. However, satisfactory performance of sensorless IM drive with such a PTC scheme also relies on the agreeable tuning of these weighting factors apart from the suitable selection of the gains of speed controller and adaptation mechanism. The present work mitigates the need of weighting factors by proposing a multi-objective ranking based approach instead of a single objective function. The approach, otherwise, reduces the additional tuning complexity of the drive system. The speed sensorless scheme considered here is a model reference adaptive system whose observing parameter is rotot-flux. A detailed simulation study in MATLAB/Simulink of the proposed work has been done with a two-level voltage source inverter fed 2.2 kW IM drive.
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