Influence of AC system design on the realisation of tractive efforts by high adhesion locomotives
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© 2017 Informa UK Limited, trading as Taylor & Francis Group. The main task for heavy haul railway operators is to reduce the cost of exported minerals and enhance the long-term viability of rail transport operations through increasing productivity by running longer and heavier trains. The common opinion is that this is achievable by means of implementation of high adhesion locomotives with advanced AC traction technologies. Modern AC high adhesion locomotives are very complex mechatronic systems and can be designed with two alternative traction topologies of either bogie or individual axle controls. This paper describes a modelling approach for these two types of AC traction systems with the application of an advanced co-simulation methodology, where an electrical system and a traction algorithm are modelled in Matlab/Simulink, and a mechanical system is modelled in a multibody software package. Although the paper concentrates on the analysis of the functioning for these two types of traction control systems, the choice of reference slip values also has an influence on the performance of both systems. All these design variations and issues have been simulated for various adhesion conditions at the wheel–rail interface and their influence on the high traction performance of a locomotive equipped with two three-axle bogies has been discussed.
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Spiryagin, M.; Wolfs, Peter; Wu, Q.; Cole, C.; Alahakoon, S.; Sun, Y.; McSweeney, T.; Spiryagin, V. (2017)© Copyright 2017 ASME. The traction performance of a locomotive under real operational conditions is strongly dependent on friction conditions present at the wheel-rail interface. The tribology of the contact process ...
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Spiryagin, M.; Wolfs, Peter; Szanto, F.; Cole, C. (2015)© 2015 Taylor & Francis. Improving tractive effort is a very complex task in locomotive design. It requires the development of not only mechanical systems but also power systems, traction machines and traction algorithms. ...