In the electrical machines, operated in railway traction drives, the growth of power density requires overproportional more heat to be discharged which leads to the need for more and more advanced cooling techniques. A novel optimization and evaluation approach for internal air cooled traction machines will be presented in this paper. It analyses and investigates the thermo-aeroand thermodynami...

the single wheel tester is an experimental device used to measure wheel forces when studying the relation of soil and wheel in a soil bin or in the field. in the model under development, a special frame holding the test wheel is connected to a loading carriage by two pairs of vertical rails and four rollers to provide a floating connection. by applying a driving torque to the test wheel shaft, ...

Aim: selection of a traction motor for electric freight transport operating in the Arctic.
 Methods: To achieve this aim, main characteristics existing types DC and AC motors were considered, as well data on use one or another type modern vehicle.
 Results: A comparative analysis most common has led to 2 leaders - permanent magnet synchronous (PMSM) an induction (IM). Both are fully s...

Abstract To solve the problem of air gap eccentric fault traction motor, characteristic frequency is close to fundamental frequency, and decomposed affects each other, which easy cause spectrum aliasing. A reconstruction variational mode decomposition method proposed (reconstructed decomposition, RVMD); first all, construct stator current signal problem, find best number, obtain multiple modal ...