Electric Traction
Objectives
The aim is for students to gain knowledge in electric drive systems for railways and electrical vehicles, analyse the constraints of the systems and scale drive systems. Students should be able to identify the main solutions used in electric traction systems, make the calculation of fundamental quantities and scale components of electric traction systems.
General characterization
Code
10967
Credits
6.0
Responsible teacher
João Francisco Alves Martins
Hours
Weekly - 4
Total - 56
Teaching language
Português
Prerequisites
Electrical theory and drives.
Bibliography
Roger Kaller e Jean-Marc Allenbach (Vol. I e II) – Traction Eléctrique, Presses Polytechniques et Universitaires Romandes, 1995
Roger Kaller, Pierre Chapas, Michel Comte e Jean-Marc Allenbach – Traction Eléctrique, Presses Polytechniques et Universitaires Romandes, 2008
Marcel Tessier – Traction Electrique et Thermo-Electrique. Ed. Scientifiques Riber, 1978
João Palma – Accionamentos Electromecânicos. Ed. Gulbenkian
Bimal Bose - Power Electronics and Motor Drives, Elsevier, 2006
Modern electric vehicle technology. C. C. Chan, K. T. Chau. New York : Oxford University Press, 2001
Theory of ground vehicles. J. Y. Wong, John Wiley & Sons
Teaching method
Concepts and techniques are explained, by the teacher, in theoretical classes. In practical classes students will test their knowledge by solving problems, laboratory essays and computer simulations.
Evaluation method
Students are assessed through three examinations (35% + 35% + 30%).
Mandatory participation in the laboratory/demonstration classes.
Subject matter
Initial concepts of electric traction.
Railway traction. National and European network. Electrification. Motion equations and developed forces (dynamic movement). Calculation of fundamental quantities (rolling resistance, tractive effort, acceleration, speed, power and energy). Mechanical railway installations: catenary, pantograph and boogies. Locomotives’ classification.
DC and AC motors and control. Regenerative braking. Alternative techniques of motorization, linear motors and magnetic levitation.
Mechanical couplings (rigid and elastic). Speed gearboxes.
Electrical vehicles traction. Electric and hybrid vehicles. Motion equations and developed forces (dynamic movement).