Electric Servo Systems

Subject 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.

The subject is taught in programs

Objectives and competences

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

Teaching and learning methods

Lectures and mandatory laboratory exercises on simulation and experimental models.

Expected study results

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.

Basic sources and literature

  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

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University of Ljubljana, Faculty of Electrical Engineering Tržaška cesta 25, 1000 Ljubljana

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