SIMULATOR OF DC TRACTION MOTORS INCLUDING BOTH MAIN POLE AND INTERPOLE SATURATION

The paper presents a two-dimensional saturation model for DC traction motors. Two look-up tables are employed, which are the measured satura tion curves for main poles and interpoles, respectively. Besides the s aturation caused by field currents, an algorithm is derived to account for the flux weakening caused by armature reaction. The effects of sa turation on all inductance parameters are presented, and Variations of the armature inductance with both main pole saturation and interpole saturation are modelled. A Simulink motor model is presented to implem ent the above features in simulation, and is used as a visualisation s imulator for DC traction motors. The simulation results from this simu lator have been confirmed by comparisons with measurements.