Abstract
The results of the research in the sphere of the efficiency increase of functioning of the traction electric motor of the ED9T electric train have been presented. Smooth and sustainable railway transport operation depends greatly on the reliability of the traction motor of the ED9T electric train and its efficiency of use. The most widespread damages in the armature winding of the traction motor of ED9T electric train are violations of the terms of the armature commuting, inter-winding faults because of the damage of the insulation of coil turns, closure of winding on the case («ground») and double closures on the ground. The authors offered a logarithmical spectral method of diagnostics allowing to determine malfunctions on the results of mathematical spectrogram processing for rapid clarification of the faults of the armature windings of the traction electric motor.
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