A study of possible reasons of the damage by electric current of traction induction motors bearings onboard of electric trains «Lastochka»

• Main Authors: Pustovetov М.Yu., Indylova N.V.
• Format: Article
• Language: deu
• Published: Academician I.G. Petrovskii Bryansk State University 2018-12-01
• Series: Naučno-Tehničeskij Vestnik Brânskogo Gosudarstvennogo Universiteta
• Subjects: bearing; frequency converter; traction induction motor; electric train; high-frequency current; shaft-grounding ring
• Online Access: http://ntv-brgu.ru/wp-content/arhiv/2018-N4/2018-04-06.pdf

There is a problem of damage of bearings of traction induction motors of electric trains «Lastochka» by electric current. Based on the fact that the bearings have a ceramic insulation coating, and the cases of its electrical breakdown is not fixed, the authors put forward a version that a high-frequency current flows through the bearing as through an electric capacitance. The analysis show that the cause of the current can be a radio standard GSM-R The proposed technical solution against the damage of bearings: the use of grounding shaft rings and replace the bearings on the other with ceramic rolling elements.