Izvestiya MGTU MAMIIzvestiya MGTU MAMI2074-05302949-1428Moscow Polytechnic University6984610.17816/2074-0530-69846Oscillations of a Rotor of the Valve Traction MotorBerbirenkovI AMSTU MAMIi7v7a7n@inbox.ruMSTU MAMI1001200931121430042021Copyright © 2009, Berbirenkov I.A.2009The article considers the structure of the valve traction motor with synchronous electromechanical transformer. Oscillations of the rotor of the synchronous motor may be caused by various reasons, e.g.: cyclic work of a traction inverter, pulsation of conductivity of operating air clearance, natural and forced oscillations of the rotor.oscillating systemfree oscillationstep runningколебательная системасвободные колебанияшаговый режим[Постников И.М. Обобщенная теория и переходные процессы электрических машин. Учебник для ВУЗов. М., «Высшая школа», 1975, с.319.]