TY - JOUR
TI - Induction motors in traction drives, service tests
AU - Bernatt, Jakub
AU - Gawron, Stanisław
AU - Glinka, Tadeusz
AU - Polak, Artur
TI - Induction motors in traction drives, service tests
AB - 
	Electric multiple units (EMUs) EN57 are fitted with two cage induction motors to each bogie. Two motors driving one bogie are supplied from a common DC/AC inverter. These motors become damaged after a short service period; the end-rings start to break away, start to break away. The results of service tests conducted during normal train runs are presented in the paper. The investigation possibilities were limited to recording load currents and vibrations of four motors installed at two bogies of one car. It has been concluded that the reason for rotor winding damage may be traced back to the simultaneous impact of four factors: 1) transmission of load  torque by mechanical gearbox; there is a backlash between the pinion mounted at the motor shaft and the toothed gear mounted at the drive bogie axle; 2) rigid assembly of the motor in the bogie frame and vibrations transmitted from the drive wheels to motor; 3) variable components of electromagnetic torque generated by higher harmonics of inverter voltage and current; 4) parallel operation of two unmatched motors supplied from common inverter.
VL - 2018
IS - Volume 10 Year 2018 (115)
PY - 2018
SN - 0011-4561
C1 - 2353-737X
SP - 85
EP - 98
DO - 10.4467/2353737XCT.18.147.9095
UR - https://ejournals.eu/en/journal/czasopismo-techniczne/article/induction-motors-in-traction-drives-service-tests
KW - cage induction motors
KW - traction drive systems
KW - service tests
KW - rotor winding failure.