Method for determining the parameters of an induction motor model

The paper proposes a new iterative method for determining the parameters of an induction motor. The calculation is based on the measured values of the no-load current and the active resistance of the stator winding. In accordance with the proposed algorithm, the parameters were calculated and the mechanical characteristics of the AIR71A4 engine were constructed. To assess the accuracy of the calculations, a comparative analysis of the resulting curve with a similar dependence was carried out, which is based on the pie chart method. The pie chart is built in accordance with the current interstate standard GOST 7217-87 based on the results of open-circuit and short-circuit tests. In the practical part of the work, using an experimental stand, measurements of the magnitude of the electromagnetic moment of the investigated asynchronous motor were carried out at various values of slip on the stable part of the mechanical characteristic. In a comparative analysis of the calculated and experimental data, it was found that the value of the determination coefficient of the data was R2 = 0.9944. This indicates a high degree of reliability of the calculation results using the proposed method. This provides a basis for the practical use of the proposed calculation method in engineering practice

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