Course syllabus for Electrical machines - design and analysis

Course syllabus adopted 2021-02-10 by Head of Programme (or corresponding).

Overview

  • Swedish nameElektriska maskiner - design och analys
  • CodeENM056
  • Credits7.5 Credits
  • OwnerMPEPO
  • 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 21124
  • Maximum participants90 (at least 10% of the seats are reserved for exchange students)
  • Block schedule
  • Open for exchange studentsYes

Credit distribution

0118 Examination 7.5 c
Grading: TH		7.5 c0 c0 c0 c0 c0 c
  • 24 Okt 2023 pm J
  • 03 Jan 2024 pm J
  • 26 Aug 2024 pm J

In programmes

Examiner

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Eligibility

General entry requirements for Master's level (second cycle)
Applicants enrolled in a programme at Chalmers where the course is included in the study programme are exempted from fulfilling the requirements above.

Specific entry requirements

English 6 (or by other approved means with the equivalent proficiency level)
Applicants enrolled in a programme at Chalmers where the course is included in the study programme are exempted from fulfilling the requirements above.

Course specific prerequisites

Course specific prerequisites for MPEPO in the Admission Regulations

Aim

The overall aim of the course is to provide understanding on physical interactions of electrical, magnetic, and mechanical phenomena in different electrical machines and ability to design an electrical machine according to requirements. The course will deal with different aspects in electrical machines: theory, characteristics, dynamics, applications, and design. The students are encouraged to consider environmental impacts of electrical machines, including materials, manufacturing, energy-efficiency, and material recycling

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

  1. describe working principle and main parts of synchronous machines and induction machines, and manufacturing process of electrical machines.
  2. model electromagnetic excitation, permanent magnets, and lamination materials considering saturation.
  3. calculate magnetic flux, flux linkage, inductance and reluctance.
  4. calculate operating points of permanent magnets under no-load and load conditions of a permanent magnet synchronous machine.
  5. describe various type of windings, e.g. distributed and concentrated windings, single or multilayer windings, integer slot or fractional slot windings.
  6. draw the distribution of phase coils in slots of a three phase machine and calculate winding factors for both distributed and concentrated windings.
  7. design double-layer 3-phase windings including selection of coil turns, series and parallel branches, and wire strand with a proper Cu fill factor. 
  8. calculate electromotive force (EMF) of a permanent magnet synchronous machine at no-load. 
  9. describe different coordinate systems including three-phase and two-phase stationary coordinate systems, d-q rotating coordinate system. 
  10. calculate inductances in d- and q-axis by using magnetic circuits for a permanent magnet synchronous machine and model permanent magnet synchronous machines in d-q coordinate system.
  11. design a permanent magnet synchronous machine for electric vehicle applications, calculate power, power factor, torque, copper losses, iron losses, and efficiency. 
  12. draw equivalent circuit and calculate steady-state performance of induction machines and analyze the influence of circuit parameters on torque-speed curve of induction machines.
  13. perform a practical experiment in order to determine the equivalent circuit parameters of an induction machine and acquire relevant quantities during a start-up.
  14. describe the dynamic model of the induction machine in different coordinate systems, perform a simulation of the starting process using Matlab, and evaluate the simulated results with the measurements. 
  15. draw phasor diagram and control reactive power by field current in a synchronous generator.
  16. describe different kinds of traction motors and discuss their features.
  17. identify the ethical aspects needed to be considered in design and use of electrical machines. 

Content

  1. Introduction of the course and different electrical machines.
  2. Magnetic circuits and torque generation
  3. Rotating magnetic field.
  4. Windings and calculations of winding factors.
  5. Coordinate systems and d-q inductances.
  6. Induction machine.
  7. PM synchronous machine.
  8. Synchronous generator.
  9. Traction motors.

Organisation

  • 18 lectures (2 x 45 min per lecture),
  • 8 tutorials (2 x 45 min per tutorial),
  • 1 session of practical laboratory work on induction machine (4 hours),
  • 3 sessions of modelling and simulation on induction machine in computer room (2 x 45 min per session),
  • 6 sessions of design assignment in computer room (2 x 45 min per session).

Literature

  • Electric Motors and Drives, by A Hughes published by Newnes, Elsevier.
  • Electric Machinery Fundamentals, by Stephen Chapman, published by McGrawHill.
  • Additional materials can be found in the course website.

Examination including compulsory elements

Final written exam: 80 points; Design assignment: 20 points. Grades: Fail, 3, 4 or 5. The practical laboratory exercises, the computer lab and the design assignment are compulsory

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.