Historical survey.
Driving factors for environment friendly transportation.
General principles of electric traction and traction system. Tractive and braking effort. Power requirements and energy consumption.
Propulsion and auxiliary systems for conventional light and heavy road vehicles.
Propulsion and auxiliary systems for electric and hybrid vehicles.
Rail-borne vehicles; electric drives, transformers and converters, control and mechanical transmission.
Power supply systems; AC and DC supplies, power capacity, overhead catenary systems, over voltages, line interferences. Electromagnetic compatibility (EMC).
Development trends.
Aim of the course is to give a broad insight into electrification of both rail and road bound transportation systems.
After completed course the student should be able to:
- describe fundamental system issues in electric transportation including e.g. tractive demands and power and energy consumption;
- calculate tractive effort, power, acceleration and velocity of rail and road vehicles;
- make estimations of voltages, currents and power of electrical drives for electric transportation;
- explain the most important electric drives for rail vehicles;
- describe generic hybrid topologies;
- explain how a hybrid vehicle works and describe its main components and their function;
- construct and apply models for electric and hybrid vehicles in order to analyse their performance;
- describe the operating principle for energy storage components, such as batteries and super capacitors, and calculate basic performance of them;
- describe the design of ac and dc power supplies for electric railway traction;
- calculate the power capacity for different railway power supply systems;
- describe the background to electromagnetic interference in electric traction.
