LAUSR

In this paper, we propose a method for calculating the inductive resistances of asynchronous motor windings at rotor eccentricity. The eccentricity results from the displacement of the rotor axis relative to the axis of the stator bore and is accompanied by an uneven air gap. It does not lead to an immediate failure of the asynchronous motor, but is accompanied by a change in almost all electromechanical characteristics and increased energy consumption. In addition, the tension between the stator and the rotor increases and leads to an increase in the air gap unevenness and the subsequent rotor touching of the stator, i.e., the motor output out of service. Consequently, the detection of the rotor eccentricity at the early occurrence stages is an important problem. This requires a mathematical model of a three-phase asynchronous motor with the rotor eccentricity. For such a model, it is necessary to determine the inductive resistances of all motor windings. We propose magnetic flux schemes through the stator phase windings and the short-circuited inductor rotor winding to calculate the inductive resistances. We also propose to determine the inductive resistances using the zero and first members of the series of the average specific conductivity of the air gap obtained by expanding it in the Fourier series.