RESEARCH OF A THREE-PHASE INDUCTION MACHINE WITH A SQUIRREL-CAGE ROTOR IN MATLAB.

Abstract

The article presents a study of a three-phase induction motor with a squirrel-cage rotor through modeling in MATLAB. It discusses the design features and operating principles of the motor, emphasizing its widespread use in industry, transportation, and household applications due to its simple design, high reliability, and cost-effectiveness. Key characteristics are described, including the dependence of electromagnetic torque on slip, the impact of load on current and rotational speed, and methods for determining efficiency and power factor, which are essential for optimizing electric drive performance. A model was developed in MATLAB using the PowerSystemBlockset library, incorporating a three-phase voltage source, blocks for measuring voltage, current, active and reactive power, electromagnetic torque, and rotational speed, as well as an asynchronous machine block. The model’s setup parameters are detailed, including the selection of rotor type, parameters of the stator and rotor equivalent circuits, magnetic circuit characteristics, moment of inertia, viscous friction coefficient, number of pole pairs, and initial simulation conditions. The simulation results are presented, illustrating the time dependencies of the motor’s state variables during operation. Particular attention is given to the analysis of electromagnetic and mechanical characteristics, enabling a deeper understanding of energy conversion processes and the optimization of operating modes for induction motors. The study contributes to improving the efficiency of electric drive systems and enhancing the understanding of their operation.