Studying vibration characteristics of NB-514 pulsed current traction motor windings

Abstract

The purpose of the article is to study the vibration characteristics of the windings of NB-514 pulsed current traction motor to identify the causes of early failure of the pole windings in order to improve their reliability in operation. The amplitude-frequency characteristics of NB-514 pulsed current traction motor winding vibration are studied; the analog vibration signal is converted into a digital code, which follows by the signal processing by digital methods. To study vibration characteristics a test bench is created, which enables the measurement of amplitude and frequency characteristics of traction motor vibrations. The analysis of the obtained measurements has shown that there are electromechanical resonances with a high degree of q-factor of the compensating winding of NB-514 traction motor and connection points of its windings and the brush holder bus at the frequencies close to 100, 200, 400, 500 and 600 Hz.