First cycle
degree courses
Second cycle
degree courses
Single cycle
degree courses
School of Engineering
Course unit
INN1027635, A.A. 2018/19

Information concerning the students who enrolled in A.Y. 2018/19

Information on the course unit
Degree course Second cycle degree in
IN0529, Degree course structure A.Y. 2011/12, A.Y. 2018/19
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Number of ECTS credits allocated 6.0
Type of assessment Mark
Course unit English denomination AC MOTOR DRIVES
Website of the academic structure
Department of reference Department of Management and Engineering
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 25/02/2019
End of activities 14/06/2019

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)

Prerequisites: Theory of electrical circuits in stationary and sinusoidal conditions. Instantaneous, active, reactive, apparent electrical power and power factor. Rotating magnetic field and magnetic circuits.
Principles of electromechanical energy conversion. Space vectors, definition and properties. Topology, scalar and vector modulation techniques for three-phase voltage inverters. Topologies, operating principles, mathematical models and control techniques of synchronous reluctance motors, DC motors, permanent magnet AC and DC synchronous motors, induction motors, step motors.
Target skills and knowledge: The course has the following expected skills:
- Knowledge of three-phase inverters and modulation techniques.
- Knowledge of the dynamic models of the main electric motors for industrial use and identification of the related parameters.
- Knowledge of torque and speed control techniques for AC motors.
- Knowledge of the problems related to the implementation of control algorithms in modern digital drives.
- Ability in choosing the type of AC industrial drive and in the combined design of the torque and speed control loops.
Examination methods: The verification of expected skills will be carried out by a two-step test.
First step: the student will have to answer a written question in a limited time (10-15 minutes). A comprehensive answer is not required, but the synthesis and clarity skills are evaluated. Only absent or completely incorrect answers impair the passage to the second step (oral).
Second step: an oral exam that generally starts with a brief comment on the first part, followed by a discussion on the course topics, in order to access the acquired knowledge.
Assessment criteria: The evaluation criteria used in the knowledge and skills verification are the following:
- Completeness of the theoretical knowledge acquired in the field of electric drives, with particular attention to motor models and torque and speed dynamics control schemes;
- Ability to apply the main evaluation criteria of the performance of the drives for an application-driven selection;
- Degree of autonomy in the choice of the best technological solution, based on the trade-off between advantages and problems of each electric motor drive.
- Absence of knowledge gaps in key concepts involved in the course.
- Ability in clear and accurate exposition of concepts.
Course unit contents: The specific contents of the course can be summarized as follows:
AC electric drives, classification and characteristics, with reference to applications in industrial environments and e-mobility. Special modulation techniques for three-phase voltage inverters with non-ideality compensation. Direct phase voltage measurement. Three-phase current control, in synchronous and stationary reference frames. PM synchronous motor drives. Parameter identification of the model and project examples. Internal permanent magnet synchronous motor drives. Nonlinear dynamic model, saturation, cross-coupling. Maximum torque per Ampere (MTPA) control and field weakening control. Techniques for the determination of the initial position. Sensorless control. Induction motor drives. Model parameter identification, equivalent Gamma and inverse-Gamma equivalent circuits. Direct and indirect FOC drives. Sensorless open-loop (OLSE) and model-based control (MRAS). The use of Simulink-Matlab in industrial drives. Design and analysis of a speed vector control for permanent magnet synchronous motor drives.
Planned learning activities and teaching methods: The course comprises the following activities:
- Theoretical study of the structure and basic models of voltage inverters, AC motors drives and the related controls;
- Examples of practical design of speed and current controls for the various types of industrial AC drives;
- Continuous references to the industrial practice and to the hints for an effective implementation of the algorithms, preparatory to the optional course of Electric Drives Laboratory, which is held at the 2nd year.
Additional notes about suggested reading: The study material includes:
- OneNote digital handouts;
- complete lecture notes written by the professor;
- articles from international journals
All material will be made available on the Moodle educational platform. The complete course notes will be available from the beginning of the course. The OneNote handouts will be provided as the lessons are given.
Textbooks (and optional supplementary readings)
  • Donald W. Novotni, Thomas A. Lipo, Vector Control and Dynamics of AC Drives. Oxford: Clarendon Press, 2005. ISBN: 9780198564393 Cerca nel catalogo
  • W. Leonhard, Control of Electrical Drives. Berlin Heidelberg: Springer-Verlag, 2001. ISBN 978-3-540-41820-7 Cerca nel catalogo
  • P. Vas, Sensorless vector and direct torque control. Eastbourne, UK: Oxford University Press, 2003. ISBN:978-0198564652 Cerca nel catalogo
  • A.M.Trzynadlowski, Power Electronic Converters and Systems - Frontiers and applications. London, UK: IET, Power and Energy Series, 2015. ISBN: 978-1-84919-826-4 Cerca nel catalogo

Innovative teaching methods: Teaching and learning strategies
  • Case study

Innovative teaching methods: Software or applications used
  • Moodle (files, quizzes, workshops, ...)
  • Latex
  • Matlab

Sustainable Development Goals (SDGs)
Quality Education Affordable and Clean Energy Industry, Innovation and Infrastructure