Electrical Engineering

1. General introduction on electrical drives (1 credit) Electrical drives in industrial process Study of mechanical couplings Transducers 2. DC Drives (3 credits) The operating principle of d.c. machines Mechanical and electrical characteristics Dynamic Model Analysis of the speed transient d.c. drives with switching converters (full-bridge converter) Current control for d.c. drives Speed control Position control Flux weakening for d.c. drives 3. Brushless Drives and Permanent Magnet Synchronous Motors (PMSM) (2 credits) Classification Brushless dc drives: mathematical model Brushless dc drives: drive system Brushless dc drives: control schemes Coordinate transformations. arbitrary reference system Coordinate transformations. the rotating vector Brushless ac drives: mathematical model Brushless ac drives: control schemes Brushless ac drives: constant power speed range (field weakening) 4. Induction motor drives (3 credits) Scalar control: constant V / f control (open loop and closed loop) Scalar control: slip control Dynamic model of asynchronous machine Direct and indirect vector control: steady state analysis Vector control: transient analysis Vector control: schemes for indirect controllers Vector control: schemes for direct controllers 5. Digital processing in electric drives (1 credit) Microprocessors, microcontrollers and DSP Examples of software for real-time control of electric drives Numerical and lab exercises

Contents of the Electrical Machines subject are required, together with the ones acquired in the Power Electronics and Automatic Controls subjects.

Lecture notes (to be taken by the students)

Not mandatory, but highly recommended

The evaluation will be made through an oral colloquium, during which the student will demonstrate: - his knowledge of the topics of the subject, - his ability to present his speech in a logical and rigorous form, using appropriate terminology, - his capability to technically discuss and support his statements.

1. R. M. Crowder - “ELECTRIC DRIVES AND THEIR CONTROLS” - Ed. Oxford Science Publications 2. W. Leonhard - “CONTROL OF ELECTRICAL DRIVES” - Ed. Springer-Verlag 3. P. C. Krause, O. Wasynczuk, S. D. Sudhoff - “ANALYSYS OF ELECTRIC MACHINERY” - Ed. IEEE Press 4. P. Pillay et alii - “PERFORMANCE AND DESIGN OF PERMANENT MAGNET AC MOTOR DRIVES” - IEEE Industry Applications Society Tutorial Course, 1991 5. R. Valentine - “MOTOR CONTROL ELECTRONICS HANDBOOK” - Ed. McGraw-Hill 6. D. W. Novotny, T. A. Lipo - “VECTOR CONTROL AND DYNAMICS OF AC DRIVES” - Ed. Oxford Science Publications 7. T. Kenjo, A. Sugawara - “STEPPING MOTORS AND THEIR MICROPROCESSOR CONTROLS” - Ed. Oxford Science Publications 8. T. A. Lipo et alii - “SYNCHRONOUS RELUCTANCE MOTORS AND DRIVES - A NEW ALTERNATIVE” - IEEE Industry Applications Society Tutorial Course, 1992

Classes are mainly based on traditional, frontal teaching. Numerical and lab exercises are also held, in order to verify the capability of students to apply the knowledge acquired during classes.