The Optimization Potential in Terms of Energy Efficiency for an Asynchronous Electric Drive Through Voltage and Frequency Control with Its Technical Condition

This article describes the study of electric drive performance with a basic scalar control algorithm for an induction motor affected by wear and tear and specific inverter characteristics. The deterioration or defect pattern of the electric motor is represented as a resulting change in the magnetizing inductance. We cover methods of mathematical and simulation modeling, along with an analysis of the equivalent circuit parameters of an induction motor according to its technical specifications. The mathematical and simulation models of three inverter configurations are shown, both with and without distortion and voltage drop. The influence of each factor on output signal waveforms is evaluated. Laboratory bench tests were conducted, proving the adequacy and reliability of the models. The simulation and experimental results support the hypothesis that the energy characteristics of an electric drive can be preserved during degradation, taking into account the specifics of the control system and the inverter. We outlined the main conclusions and provided practical recommendations for applying each of the considered inverter models in electric drive systems.