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.
Highlights
Within recent years development of power engineering is characterized with active implementation of electronic equipment
Implementation of new processes and technology contributes to degradation of power quality indices (PQI) that results in reduction of equipment reliability and increase of failures in operation of electric machines
The result is obtained by that the method for diagnostics of asynchronous motor (AM) inter-turn short circuits including measurement of EMF for motor winding during shaft rotation under its own inertia after deenergization, differs in that EMF oscillation frequency is measured, this value is compared with values measured on properly operating motor and according to the conclusion results a conclusion about availability of inter-turn short circuits is made
Summary
Within recent years development of power engineering is characterized with active implementation of electronic equipment. Implementation of new processes and technology contributes to degradation of power quality indices (PQI) that results in reduction of equipment reliability and increase of failures in operation of electric machines. The operating reliability and efficiency of electric equipment functioning at the basic life-cycle stages can be achieved by use of the procedures and means for evaluation of the technical condition for the electrical equipment [4]. Units of asynchronous motors with voltage of 0.4 kV are operated in Russia. At correct operation their service life is about 15-20 years [5]. For evaluation of the technical condition for the electrical equipment it is necessary to use instruments adapted for the certain operating conditions, structural and climatic version of the examined object [6,7]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
