Control and Power Sharing Strategy of Dual Three-Phase Permanent Magnet Synchronous Motor for Light Railway Applications

Dual three phase permanent magnet synchronous machines (DTPMSM) are gaining attraction nowadays due to their remarkable superiorities such as decreasing of harmonic distortion and total losses, having higher power density and tolerance against to fault. High reliability of these motors in case of any phase failure, which is the main reason of interest to multiphase machine, is vital parameter for traction systems. This study addresses the power-sharing strategy for DTPMSM in order to enable better utilization of energy sources and reduce the conversion step by using the second winding of DTPMSM as a DC-link. Besides, a benchmarking of six-phase PMSM, mathematical analysis of DTPMSM as well as simulation results are given with this research. The aim of the paper is to guarantee that the power is shared between windings with respect to the rated power of the supply sources by examining speed-current control methods and identifying an optimal power-sharing strategy for the fuel cell/battery trains. In the light of the aim, DTPMSMs were modelled in MATLAB/Simulink medium and comparative analysis is illustrated at the end of the article.