The article presents a novel maximum torque per Ampere criterion based on induction motor model with consideration of magnetic circuit saturation. Proposed criterion provides significant improvement of torque tracking accuracy in all control range and can be used in existing and new torque controllers. In addition this criterion allows to minimize stator motor and indirectly increase the energy efficiency of electromechanical energy conversion compared to standard algorithms of vector control. The efficiency of proposed solution is approved by experimental investigations.
Proposed universal criterion of optimization can be used control algorithms which provides asymptotic flux and current tracking and also asymptotic field orientation.