A Review on Different Aspects of Traction Motor Design for Railway Applications
Journal article, 2020

This paper presents a review of the current traction motor topologies available in the railway market in three parts. In the first part, essential aspects of the electromagnetic design of railway traction motors, e.g. motor sizing and rotor configurations, are discussed. Different topologies are compared considering the wide range of applications. The pros and cons of each topology in specific applications are highlighted based on the corresponding performance requirements. Different cooling configurations of traction motors common in railway are reviewed in the paper second part where focus is placed on the solutions based on air cooling. The third part presents a review of the available insulation systems for traction motors. Two primary insulation systems used in traction applications with thermal classes of H and N are discussed. The focus in this paper is placed on the main applications in railway including light rail vehicles, metros, electric multiple units, high speed trains and locomotives. Additionally, trends in traction motors development in the coming years are reported separately for electromagnetic, cooling and insulation designs.

high-speed train

forced-ventilated motor

permanent magnet motor

self-ventilated motor.

light rail vehicle


Electric multiple units

induction motor


Shafigh Nategh


Aldo Boglietti

Polytechnic University of Turin

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Daniel Barber

Ron Brammer

IEEE Transactions on Industry Applications

0093-9994 (ISSN)

Analysis and Improvement of Insulation System of Traction Motors Exposed to High-switching Frequency Converters

ABB Sweden, 2018-12-14 -- 2020-06-15.

Swedish Energy Agency, 2018-12-14 -- 2020-06-15.

Driving Forces

Sustainable development

Areas of Advance


Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

More information

Latest update