Experimental validation of a novel core-loss model including additional harmonic losses for online energy efficient control of induction motors

摘要

Energy efficient control of induction motor involves representation of motor losses by suitable models in control structure and generation of control reference such that modelled losses are minimized. Accurate loss representation thus form an important part of loss model based (LMC) control. This paper deals with subject of loss model accuracy versus complexity of online implementation of such models for online maximum efficiency control. It is shown in this paper that the effect of voltage harmonics can be easily included into additional harmonic losses models enhancing the accuracy of no load loss models. To prove the above point, the induction motor losses are measured through no load and load tests and then are segregated into different loss components. The logical rational is established to support the representation of additional harmonic losses in the proposed way. The modelled losses are then compared against measurements to establish accuracy of different models.