Ingegneria meccanica - Mechanical Engineering

FABIO GIULII CAPPONI

The subject aims to guide the student in understanding the principles of operation of AC machines at variable speed. The module will provide methods to analyze the behaviour of AC drives both in steady state and during transients. Finally, it will give the student knowledge on how torque is controlled in these machines.

Conoscenze di base di Controlli Automatici

1. Introduction on electric drives (1 credit)
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
Introduction to speed control
Flux weakening for d.c. drives
3. Permanent Magnet Synchronous Motor (PMSM) drives (2 credits)
Classification
Coordinate transformations: arbitrary reference frame
Coordinate transformations: the rotating vector
Brushless ac drives: mathematical model
Brushless ac drives: control schemes
Brushless ac drives: constant power speed range (field weakening)

1. W. Leonhard - “CONTROL OF ELECTRICAL DRIVES” - Ed. Springer-Verlag
2. P. C. Krause, O. Wasynczuk, S. D. Sudhoff - “ANALYSYS OF ELECTRIC MACHINERY” - Ed. IEEE Press
3. P. Pillay et alii - “PERFORMANCE AND DESIGN OF PERMANENT MAGNET AC MOTOR DRIVES” - IEEE Industry Applications Society Tutorial Course, 1991
4. D. W. Novotny, T. A. Lipo - “VECTOR CONTROL AND DYNAMICS OF AC DRIVES” - Ed. Oxford Science Publications

Traditional face-to-face, with supporting computer simulations.

Frequenza non obbligatoria, ma fortemente consigliata

La valutazione consiste in un colloquio orale in cui lo studente dovrà dimostrare:
- la sua conoscenza degli argomenti trattati,
- la sua capacità di articolare il discorso in maniera logica e rigorosa, facendo uso di terminologia appropriata,
- di saper giustificare tecnicamente le sue affermazioni.