Abstract
A model of squirrel cage induction motor has been developed and implemented in the MATLAB/Simulink software. The proposed model takes into account saturation of magnetic core at high currents in windings of electric motor, as well as current displacement in rotor conductors and internal resistance of power source. The model structure allows to simulate steel saturation according to dependences of physical machine. An equation with coefficients obtained by approximation of experimental data has been proposed for simulation of mutual inductance between stator and rotor as a function of mutual induction flux linkage. The model has been verified in the MATLAB/Simulink environment and on a laboratory test rig by experimental validation of predicted data. The developed model can be used for investigation into dynamic modes of an asynchronous motor. Various drive starting modes have been simulated; in addition, together with electric and mechanic variables, the model determines energy performances. The model has been applied in practice to detect the possibility of using starting currents and voltages of a motor for experimental determination of power source variables.
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