Numerical Simulation of the Transient Railway Traction Motor with Frequency Control

Continuing the papers by Tulbure et al. (2004), are presented some significant results of numerical simulations for railway traction motors, which can be treated as components of electrical locomotives EC-43, by 3.6 MW, with 80t mass. For the starting mode of operation in frequency steps of Deltaf=2.5 Hz, with the slip S_c=0.1, are interesting the evolution and interpretation of r.m.s. values of input voltage U₁[V], stator current I₁[A], traction force F_T[t], developed power P[kW] and speed v[km/h]. It is imposed the maintenance of excitation flux at nominal value Psi=2.73[Wb]

1. Introduction

Each asynchronous squirrel cage motor from the four motors of the EC-43, 3.6MW locomotive presents the following nominal characteristics: a.

; ;

b.

; ;

c.

State variables: ;

d.

Locomotive weight . The train weight ;

e.

Input voltage is function of frequency (f), slip (s) and assures the excitation flux maintenance condition at nominal level, [Wb].