Imitation modeling of induction motor for increasing the level of diagnostic systems
DOI:
https://doi.org/10.33216/1998-7927-2022-271-1-18-23Keywords:
simulation, induction motor, winding asymmetry, diagnostics, stator windingsAbstract
Given the wide range of applications of induction motors and the difficult conditions of their operation with the ever-increasing cost of failure, the requirements for their reliability, timely determination of the state and time of trouble-free operation are growing rapidly. To increase the level of reliability of asynchronous electric motors, it is necessary to improve existing and develop new methods of diagnosing them, which is done by studying the processes of various motor defects using modern tools, including simulation. The analysis of the principle of the proposed simulation model of an induction motor and the comparison of the obtained simulation results with the calculated ones according to the classical method are carried out. In order to establish the degree of adequacy of the proposed mathematical model, the paper compares the results of simulation with the results of calculations according to the classical method. The maximum error when comparing the parameters is in the range of 0.045-6.365%, which confirms the adequacy and high level of accuracy of the simulation model. Using this model with high adequacy of the real induction motor system, it is advisable to study the processes occurring in the motor during interturn short circuit in one or more phases, diagnose the degree of interturn short circuit in the stator winding, as well as study of asynchronous asynchronous motor nutrition. The advantages of using this simulation model are the ability to study dynamic processes in an induction motor with a short-circuited rotor having asymmetric stator windings with high reliability of results. In addition, the model considered in this paper makes it possible to create an asymmetric rotating stator field for further studies of winding damage in interturn short circuits, which is very important in determining the state of the motor. The mathematical model of an induction motor uses an algorithm to take into account changes in the mutual inductance of windings from changes in the complex resistance of one or more windings, which will significantly increase the idea of dynamic processes actually occurring in a motor with asymmetric windings. damage to the stator winding.
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