FUNCTIONAL DIAGNOSIS OF THE PARAMETERS OF THE THREE-PHASE ASYNCHRONOUS ENGINE WITH A SHORT-CIRCUITED ROTOR

Abstract

Development  of  a  method  and  technical  means  for  studying  the  characteristics  of  an induction motor with a short-circuited rotor using the voltage converter of the software-hardware complex.  Investigation  of  the  characteristics  of  an  induction  motor:  start  of  motors  at  low voltage, experiments of idling, loading, short circuit. Determination of a number of various parameters of motors, obtaining  of  operating  and  other  characteristics,  consideration  of  different  ways  of  regulation  of rotation speed, etc. Findings. Typical characteristcs of an asynchronous motor with short-circuited rotor in different operating  modes  were  determined,  an  overview  of  the  most  common  complex  stands  for  the  study  of asynchronous motors was performed, a comparative analysis of elements of the induction motor load was made.  The  characteristics obtained for the test  engine  are  very similar  to the standard  characteristics  of induction motors used in production and in laboratory stands.
Originality.  The  possibility  of  using  a  modernized  stand  with  a  special  scheme  of  the  voltage converter is substantiated. It will greatly increase the time of continuous operation of the three-phase motor and reduce the energy consumption.
Practical value. A stand for studying the characteristics of an induction motor with a short-circuited rotor using a voltage converter has been developed. This will allow to measure the insulation resistance of the  windings  relative  to  the  casing  and  between  the  phases  of  the  windings;  to  test  the  insulation  of  the windings for electrical strength, to continuously monitor its parameters. Due to its small size, economic and
technical characteristics, this stand is easy to operate in the study of asynchronous motor in three-phase and single-phase modes, and promotes more modern and demonstrative learning.