A new model based control strategy for energy efficiency improvement of induction motors with variable load

This paper proposes a new control strategy for energy efficiency improvement of three-phase induction motors (TIM) with variable load. Main control is based on Indirect Field-Oriented (IFOC) which shows a good performance of torque and speed. Additionally it is proposed a new loss model based controller in order to optimize the active power consumed by TIM for different load conditions. Matlab simulations are performed to test the proposed strategy for different loads where the optimal flux is found. The strategy is also tested using PSIM simulation where the drive system is included. To verify the approach in real conditions a motor drive prototype was assembled and experimental results are presented.