Course syllabus for Electric machines for vehicles and vessels

Course syllabus adopted 2021-02-11 by Head of Programme (or corresponding).

Overview

  • Swedish nameElmaskiner för fordon och farkoster
  • CodeEEN135
  • Credits7.5 Credits
  • OwnerMPMOB
  • Education cycleSecond-cycle
  • Main field of studyElectrical Engineering
  • DepartmentELECTRICAL ENGINEERING
  • GradingTH - Pass with distinction (5), Pass with credit (4), Pass (3), Fail

Course round 1

  • Teaching language English
  • Application code 89125
  • Maximum participants90
  • Minimum participants15
  • Block schedule
  • Open for exchange studentsYes

Credit distribution

0121 Intermediate test, part A 2 c
Grading: TH		 2 c
0221 Intermediate test, part B 2 c
Grading: TH		 2 c
0321 Intermediate test, part C 2 c
Grading: TH		 2 c
0421 Laboratory, part D 1.5 c
Grading: UG		 1.5 c

In programmes

Examiner

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Eligibility

Information missing

Course specific prerequisites

Introduction to propulsion and energy systems for transport or equivalent

Aim

Electric machines are becoming more and more central in modern propulsion. As an engineer it is therefore important to know the fundamentals of this technology to design and develop propulsion systems. In this course students will learn about the different types of electric machines and how to calculate their output power, efficiency and energy loss. The course also includes overload and field weakening operation of the machines. 

Learning outcomes (after completion of the course the student should be able to)

  1. Explain the damage that may occur in the event of improper handling of electrical systems and how to avoid them from an electrical safety perspective and carry out electrical laboratory work in a safe manner.
  2. Describe and model ideal components such as inductance, resistance, alternating voltage sources and alternating current sources.
  3. Describe the material concepts resistivity and temperature coefficient and to be able to use them in electrical calculations.
  4. Apply the fundamental laws that governs and quantities that describe magnetic circuits: magnetomotive force, magnetic flux, reluctance, induced voltage and electromagnetic force.
  5. Apply Ohm's law, Kirchhoff's laws, power law and energy calculation to simple AC circuits.
  6. Describe how a rotating flux is created in 3-phase AC machines and how it can be modeled in the stationary 2-phase system and in the rotating 2-phase system.
  7. Calculate space vectors of voltages, currents and fluxes using the Park and Clark transformations and use these to model 3-phase AC machines. Calculate apparent, active and reactive power as well as energy with space vectors.
  8. Explain the build-up (the parts of) and operation of synchronous and induction machines and model the machines both dynamically and stationary.
  9. Calculate speed, current, voltage, losses, powers and torques at different loads for both the synchronous and induction machines, based on the equivalent circuits of the machines. 

Content

The course is divided into four parts A, B, C and D:
  • A: Basic simple electrical circuits and magnetic circuits: Voltage, Current, Resistance, Power, Energy, Ohm's law, KVL, KCL, Magnetic flux, Reluctance, MMF, Induced voltage, Inductance, Power, Rotating flux and Park / Clark transformation.
  • B: Induction machine: Equivalent circuit (dynamic + stationary), Torque-speed characteristics, Field weakening, Efficiency, losses, Overload capacity
  • C: The synchronous machine: Equivalent schedule (dynamic + stationary), Torque speed characteristics, Field weakening, Efficiency, losses, Overload capacity
  • D: Laboratory work: Measure on AC circuits and on stationary and dynamic operation of an induction machine. Dynamically simulate an induction and a synchronous machine.

Organisation

The course is carried out with lectures, exercises, laboratory work and intermediate tests. 

Literature

Compendium, lecture notes and handouts.

Examination including compulsory elements

The course examination will involve three intermediate tests and one laboratory work
  1. Part A, 2 points: Basic simple electrical circuits and magnetic circuits. Examination: intermediate test. The maximum number of points on the test is 30 points.
  2. Part B, 2 points: The Asynchronous Machine. Examination: intermediate test. The maximum number of points on the test is 30 points.
  3. Part C, 2 points: The synchronous machine. Examination: intermediate test. The maximum number of points on the test is 30 points.
  4. Part D, 1.5 credits: Laboratory work. Examination: The examination takes place during the laboratory work

The grading scale for the three intermediate tests is:
Grade 3 between 12 and 17.9 points
Grade 4 between 18-23.9 points
Grade 5 between 24-30 points

For the final grade it is required that all parts, A, B, C and D are passed and when it is fulfilled the final grade is based on the summation of the points from parts A, B and C according to:
Grade 3 between 45-59.9 of the total score from A + B + C
Grade 4 between 60-74.9 of the total score from A + B + C
Grade 5 between 75-90 of the total points from A + B + C 

The course examiner may assess individual students in other ways than what is stated above if there are special reasons for doing so, for example if a student has a decision from Chalmers on educational support due to disability.