Electric Servo Systems

Course description

Definition of servo drives, deficiencies of classical approaches, voltage/frequency supplying of AC machines. Control of converters and modulation approaches. Vector models of AC machines in comparison to DC machines, Field orientation theory, control of servo drives with induction, synchronous, electronically commutated and reluctance motors. Modern methods for open- and closed-loop control. Sensorless control. Discrete control and theory of MIMO systems in the area of servo drives. Microprocessors in servo drives.

Course is carried out on study programme

Elektrotehnika 2. stopnja

Objectives and competences

Getting to know servo drives, as basis for modern mechatronics, their complexity, and integration of components. Choosing the suitable motor.

Learning and teaching methods

Lectures and mandatory laboratory exercises on simulation and experimental models.

Intended learning outcomes

Knowledge and understanding:

The student will get acquainted with task performed by servo drives, will describe possibilities and problems in its realization using different machines, and will study modern control techniques.

Application: Practical calculation and optimization of control loops through examples of different electrical drives. Implementation of general modelling of discrete and multivariable systems.

Analisys: An evaluations and comparison between ideal, theoretical, models and industrial drives in a real environment will be possible through simulations and testing.

Transferable skills: Use of information technologies: building up the simulation models of servo drives. Computational skills: calculation and optimization of control parameters.

Reference nosilca

  1. AMBROŽIČ, Vanja, ZAJEC, Peter. Električni servo pogoni. izd. V Ljubljani: Slovensko združenje elektroenergetikov CIGRÉ-CIRED, 2016. ISBN 978-961-6265-27-0. [COBISS.SI-ID 283707392]
  2. KONTARČEK, Andraž, BAJEC, Primož, NEMEC, Mitja, AMBROŽIČ, Vanja, NEDELJKOVIĆ, David. Cost-effective three-phase PMSM drive tolerant to open-phase fault. IEEE transactions on industrial electronics, ISSN 0278-0046. [Print ed.], Nov. 2015, vol. 62, no. 11, str. 6708-6718, ilustr., doi: 10.1109/TIE.2015.2437357. [COBISS.SI-ID 11176276]
  3. DROBNIČ, Klemen, NEMEC, Mitja, FIŠER, Rastko, AMBROŽIČ, Vanja. Simplified detection of broken rotor bars in induction motors controlled in field reference frame. Control engineering practice, ISSN 0967-0661. [Print ed.], Aug. 2012, vol. 20, no. 8, str. 761-769, ilustr. [COBISS.SI-ID 9208660]
  4. MAKUC, Danilo, DROBNIČ, Klemen, AMBROŽIČ, Vanja, MILJAVEC, Damijan, FIŠER, Rastko, NEMEC, Mitja. Parameters estimation of induction motor with faulty rotor. Przeglęad Elektrotechniczny, ISSN 0033-2097, 2012, rok 88, 1a, str. 41-46, ilustr. [COBISS.SI-ID 8870228]
  5. NEMEC, Mitja, DROBNIČ, Klemen, NEDELJKOVIĆ, David, FIŠER, Rastko, AMBROŽIČ, Vanja. Detection of broken bars in induction motor through the analysis of supply voltage modulation. IEEE transactions on industrial electronics, ISSN 0278-0046. [Print ed.], Aug. 2010, vol. 57, no. 8, str. 2879-2888, ilustr. [COBISS.SI-ID 7819604]

Study materials

  1. Ambrožič  Vanja, Zajec Peter: »Električni servo pogoni«, Slovensko združenje elektroenergetikov CIGRÉ-CIRED, 2016.
  2. Ambrožič Vanja: »Mikroračunalniki v močnostni elektroniki«, Fakulteta za elektrotehniko, Ljubljana, 2001
  3. Leonhard W.: “Control of Electrical Drives”, Springer, Berlin, 2001
  4. Bose B. K.: “Modern Power Electronics and AC Drives”, Prentice Hall, 2002

Bodi na tekočem

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

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