Electric Machines

Course description

A common base of electric machines: the nominal data types and operation of electrical machines, magnetic field, induced voltage, electromagnetic torque, losses and efficiency, heating of electrical machines. Addressing basic electrical machines: transformers, autotransformatorji, synchronous machines, induction machines and commutator machines. Presentation and discussion of modern electrical machines and their use at electricity generation using renewable energy, automation of industrial processes, transport vehicles – hybrid vehicles, robotics, superconducting systems, power tools and micro-electromechanical systems.

Course is carried out on study programme

Elektrotehnika 1. stopnja

Objectives and competences

The aim of this course is to gain theoretical knowledge needed to understand the basic concepts of electrical machines and principles of operation of various types of electrical machines. Knowledge of the basic electric machines circuit models and input-output characteristics of electrical machines. Understanding of basic tests in the field of electrical engineering. Provide guidance for understanding the operational problems of electrical machines.

Learning and teaching methods

Lectures, tutorials and laboratory work.

Laboratory exercises are with heightened risk (high voltage, rotating parts, …).

The course consists of 45 hours of lectures 15 hours of tutorial and 30 hours of laboratory exercises with heightened risk.

Intended learning outcomes

After successful completion of the course, students should be able to:

– present the basics of electromechanical energy conversion,

-clarify the basic concepts of torque and mechanical equilibrium,

-explain the operation of electric transformers generators and motors,

-calculate the basic characteristics of different types of electric machines,

– analyze simple tests in the field of electric machines,

-explain the problem of the manufacture and design of electrical machines.

Reference nosilca

1. VUKOTIĆ, Mario, MILJAVEC, Damijan. Design of a permanent-magnet flux-modulated machine with a high torque density and high power factor. IET electric power applications, ISSN 1751-8660, 2016, vol. 10, iss. 1, str. 36-44.

2. VIDMAR, Gregor, MILJAVEC, Damijan. A universal high-frequency three-phase electric-motor model suitable for the delta and star winding connections. IEEE transactions on power electronics, ISSN 0885-8993, Aug. 2015, vol. 30, no. 8, str. 4365-4376.

3. VIDMAR, Gregor, MILJAVEC, Damijan, AGREŽ, Dušan. Measurement and evaluation of EDM bearing currents by the normalized Joule integral. Measurement science & technology, ISSN 0957-0233, 2014, vol. 25, no. 7, str. 1-10.

4. GOTOVAC, Gorazd, LAMPIČ, Gorazd, MILJAVEC, Damijan. Analytical model of permeance variation losses in permanent magnets of the multipole synchronous machine. IEEE transactions on magnetics, ISSN 0018-9464, Feb. 2013, vol. 49, no. 2, str. 921-928.

5. MILJAVEC, Damijan, JEREB, Peter. Električni stroji : temeljna znanja. 2. izd. Ljubljana: Fakulteta za elektrotehniko, 2016.

Study materials

1. Damijan Miljavec, Peter Jereb: Električni stroji – temeljna znanja, Ljubljana, 2016.

2. Stephen J. Chapman, Electric Machinery Fundamentals, McGraw-Hill Higher Education; 5 edition, 2011.

3. Austin Hughes, Bill Drury:Electric Motors and Drives: Fundamentals, Types and Applications,  Newnes, 4th Revised edition edition, 2013.

4. Dino Zorbas, Electric Machines, Nelson Engineering, 2014.

5. P. C. Sen, Principles of Electric Machines and Power Electronics, John Wiley & Sons; 3rd Edition, 2013.

Bodi na tekočem

Univerza v Ljubljani, Fakulteta za elektrotehniko, Tržaška cesta 25, 1000 Ljubljana

E:  dekanat@fe.uni-lj.si T:  01 4768 411