First cycle
degree courses
Second cycle
degree courses
Single cycle
degree courses
School of Engineering
Course unit
INN1027635, A.A. 2017/18

Information concerning the students who enrolled in A.Y. 2017/18

Information on the course unit
Degree course Second cycle degree in
IN0529, Degree course structure A.Y. 2011/12, A.Y. 2017/18
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Number of ECTS credits allocated 6.0
Type of assessment Mark
Course unit English denomination AC MOTOR DRIVES
Department of reference Department of Management and Engineering
E-Learning website
Mandatory attendance No
Language of instruction Italian
Single Course unit The Course unit can be attended under the option Single Course unit attendance
Optional Course unit The Course unit can be chosen as Optional Course unit

Teacher in charge MAURO ZIGLIOTTO ING-IND/32

ECTS: details
Type Scientific-Disciplinary Sector Credits allocated
Core courses ING-IND/32 Electrical Convertors, Machines and Switches 6.0

Course unit organization
Period Second semester
Year 1st Year
Teaching method frontal

Type of hours Credits Teaching
Hours of
Individual study
Lecture 6.0 48 102.0 No turn

Start of activities 26/02/2018
End of activities 01/06/2018

Examination board
Board From To Members of the board
8 2017 01/10/2017 15/03/2019 ZIGLIOTTO MAURO (Presidente)
TINAZZI FABIO (Membro Effettivo)
OBOE ROBERTO (Supplente)
7 2016 01/10/2016 15/03/2018 ZIGLIOTTO MAURO (Presidente)
CHITARIN GIUSEPPE (Membro Effettivo)
OBOE ROBERTO (Supplente)

Prerequisites: Fundamentals of electric machines and drives, Principles of Electrotechnics.
Target skills and knowledge: The course gives specific skills on the design of AC motor drives. The dynamic behaviour of most important AC motors is analysed. Both conventional and advanced control techniques are applied to synchronous and asynchronous motor drives. A complete design example is carried out by a case study. Practical design hints, as well as analysis of critical factors, as parameter sensitivity and fixed point conversion in AC drives are given as well. An experimental activity at Mechatronics lab is included in the course.
Examination methods: The exam is oral and aimed at evaluating the knowledge acquired during the course. It is accessed by a short written test, lasting 10-15 minutes, immediately before the oral exam, which consists in answering a single question concerning the program.
Assessment criteria: The answer to the written question does not need to be esautive, it is sufficient to show that you know the subject. It has no evaluation in thirtieths. The assessment takes place through the oral test, with a series of questions also linked to the goal of understanding the level of deepening of the preparation and intimate understanding of the topics. The skills in terms of comparisons and parallels with similar technical situations, awareness of orders of magnitude and implementation feasibility will be positively evaluated.
Course unit contents: The course covers the modeling and the design of torque and speed control loops for industrial AC motor drives, starting from the study of three-phase voltage inverter and the compensation of its non-ideality. In addition to the traditional techniques, the course includes some advanced alternatives, according to the most recent research lines. They include parameters estimation and sensorless control techniques.
Planned learning activities and teaching methods: [1] AC motor drives: introduction and classification. Three-phase voltage-fed PWM inverters. Modulation strategies. Space vector theory. The problem of voltage measurement. Inverter non-linearity compensation. Electromagnetic and acoustic noise. Three-phase current control. Control in both stationary and synchronous frames. Hysteresis control. Predictive control.
[2] Permanent magnet synchronous motor drives. - PMSM, principle of operation. Equivalent circuit, block schematic. Field oriented control. Axis decoupling and feedforward actions. Fault-tolerant PMSM drives. Interior Permanent Magnet (IPM) drives. Synchronous and reluctance PM motor drives. Model and equations. Operating points. Field oriented control. Flux weakening control. Sensorless control.
[3] Three-phase induction motor drives. Principle of operation. System equations in the general rotating reference frame. Rotor flux oriented reference systems. Block schematics. Torque equations. The field oriented control principle. Direct and indirect current-controlled FOC schemes. Open-loop vector control. Parameters estimation.
[4] Laboratory - Parameter identification of IM and PMSM motors. Speed and current control of PMSM and IM drives. Three-phase inverter, characterization, deadtime compensation.
Additional notes about suggested reading: The handouts written by the teacher and provided via web cover the syllabus completely. The other texts listed below are intended as entirely optional, for possible deepening of some parts of the course.
Textbooks (and optional supplementary readings)
  • L.Peretti, M.Zigliotto, Azionamenti elettrici industriali. --: --, 2015. Dispensa fornita via WEB dal docente
  • D.W.Novotni, Vector Control and Dynamics of AC Drives. --: Clarendon Press, 1996. Cerca nel catalogo
  • W.Leonhard, Control of electrical drives. --: Springer, 2001. Cerca nel catalogo
  • P.Vas, Sensorless vector and direct torque control. --: Oxford University Press, 2003. Cerca nel catalogo
  • A.M.Trzynadlowski, Power Electronic Converters and Systems - Frontiers and applications. London, UK: IET, Power and Energy Series, 2015. Chapter "Permanent magnet synchronous motor drives", M.Zigliotto Cerca nel catalogo