Historical overview.

Incentives for environmentally friendly vehicles.

General principles of electric traction. Traction and braking effort. Power requirements and energy consumption.

Basic structure of conventional light and heavy road vehicles.

Propulsion and auxiliary systems for electric and hybrid road vehicles.

Traction vehicles: electric drive systems, transformers and converters, control and regulation and the mechanical transmission.

Track supply: DC and AC supplies, power transfer capacity, overhead catenary systems, over voltages, line interferences and electromagnetic compatibility.

Development trends.

After passing the course, the student should be able to

• account for basic system engineering aspects of electric transport systems such as running resistance, traction, adhesion, power requirements and energy consumption
• calculate tractive effort, power, acceleration, etc. for road and rail vehicles 
• account for the most important electric drive systems for road and rail vehicles
• make estimations of voltages, currents and power of electrical drives for electric transportation
• account for basic hybrid topologies, their working methods and main components
• create and apply models for electric and hybrid vehicles to analyze their properties
• account for the functional principle of energy-storing components such as batteries and supercapacitor, and calculate their basic performance 
• describe the structure of electric track supply systems, both with direct and alternating current
• calculate the power capacity for different railway power supply systems
• describe the background to electromagnetic interference in electric traction 

in order to gain a broad insight into electric traction, both for road and rail vehicles.

One of the following courses are recommended; EJ2201 Electrical Machines and Drives, EJ1200 Electric Power systems or EJ2301 Power Electronics

Östlund, S. Electric Railway Traction, KTH 2019. This text book will be provided for free at the lectures.

Hybrid drive systems for vehicles - System design and traction concepts. Available on Canvas.

Computer access: The course requires access to Matlab/Simulink.

Students at KTH with a permanent disability can get support during studies from Funka:

Funka - compensatory support for students with disabilities

• PRO1 - Project Work, 2.0 credits, grading scale: P, F
• TEN1 - Written Exam, 4.0 credits, grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

If the course is discontinued, students may request to be examined during the following two academic years.

PRO1 - Project Work, 2.0 credits

TEN1 - Written Exam, 4.0 credits

Passed in all examination moments.

0-22 = F

23-24 = Fx

25-29 = E

30-34 = D

35-39 = C

40-44 = B

45-50 = A

Students with total points 23-24 will be able to complete the requirements via a supplementary examination.

• All members of a group are responsible for the group's work.
• In any assessment, every student shall honestly disclose any help received and sources used.
• In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.