Development of the software-hardware complex for diagnostics of inter-turn short circuits of stator windings of asynchronous motors

Abstract

Up to 38% of asynchronous motor (AM) failures are caused by damage to the stator insulation. Despite the wide variety of methods, the reliability of determining the inter-turn short circuits of stator windings under operating voltage still remains at a low level. The existing methods for diagnostics of asynchronous motor failure of the interturn short circuit of stator winding have been examined. New diagnostic methods for individual parameters developed in the course of the previous study are described. A new diagnostic method is formulated, on the basis of which the research work is carried out. The method will allow us to constantly monitor the technical condition of the stator winding, and identify its damage at an early stage of their development. Diagnostics can be performed without dismantling the engine and without removing it from the working process. The microprocessor unit is implemented for diagnostics of the technical condition of AM introducing this method. Moreover, the software and hardware complex is implemented for diagnostics of the technical condition for AM. The results of experiments on a laboratory stand with inter-turn AM closures are presented, which confirm the higher reliability of monitoring.

Method for Determining the Degree of Damage to the Stator Windings of an Induction Electric Motor with an Asymmetric Power System

“…But, as in the works [44,45], the possibility of the proposed method under conditions of unbalance of the supply voltage system of an induction motor was not considered. The work [47] was devoted to the determination of interturn short circuit in the windings of an induction motor with an unbalance in the supply voltage system of an induction motor. The implementation of the algorithm proposed in [47] requires a large amount of initial data.…”

“…The work [47] was devoted to the determination of interturn short circuit in the windings of an induction motor with an unbalance in the supply voltage system of an induction motor. The implementation of the algorithm proposed in [47] requires a large amount of initial data. In addition, none of the listed works provide an algorithm for determining the number of damaged turns.…”