The simulation of the traction drive with middle-frequency transformer

Abstract

This paper presents research motivated by industrial demand for special traction drive topology devoted to minimization of traction transformer weight against topology with classical 50Hz traction transformer. The special traction drive topology for AC power systems consists of input high voltage trolley converter (single phase matrix converter) – middle frequency transformer – output converter - traction motor has been described. The main attention has been given to the control algorithm of the traction topology (inserting of NULL vector of matrix converter and Two-value control of secondary active rectifier).