Lecturer: Ezio Bassi   Francesco Benzi  

Course name: Electrical Drives and Automation (Advanced)
Course code: 503134
Degree course: Ingegneria Elettrica
Disciplinary field of science: ING-IND/32
L'insegnamento è caratterizzante per: Ingegneria Elettrica
University credits: CFU 9
Course website: n.d.

Specific course objectives

The course focuses on a series of arguments related to industrial and home automation, with a special emphasis on the integration of electrical drives in automation-oriented applications.

Course programme

The course covers two principal subjects i) it gives an overview of the dynamic behavior of electrical drives, by taking into account mathematical models of motors, converters and regulation algorithms. Drives are considered as complex systems integrated in an industrial environment with special attention paid to automation and robotics; ii) it describes a series of components, devices, protocols related to the exchange of data for both industrial and civil applications (domotics). Issues such as fieldbusses, ISO/OSI model, metering and smart grids are specifically addressed, also with the aid of worked examples.

Induction motor
dynamic model and instantaneous torque, d-q (Park) transfomations and equations in vectorial form; direct and indirect Field Oriented Control; Direct Torque Control; reconstruction of rotor and stator flux; field weakening operation; Current-Source Inverter Drive with regeneration.

A.C. current control
Control of the currents of a three-phase system (i.e. motor) in different reference systems (abc, αβ, dq); PI regulators; Hysteresis regulators; predictive control; compensation of dq coupling terms.

Space Vector PWM
Inverter configurations, voltage reference and basic principles of the method, definition of the exagon and overmodulation, optimal sequence of inverter states, limitation of switching frequency and current ripple

Electrical Machines
Brushless Motor: permanent Magnets, construction and types of rotor, e.m.f. induced in the stator windings; magnet and reluctance torque; d-q dynamic model; closed-loop torque and speed control; field weakening operation. Synchronous Reluctance Motor; Drives with linear actuators; Switched Reluctance Motor

Fieldbus for Industrial Automation
Automation Systems Architectures; devices for the automation, industrial PLC & PC, systems for Numeric Control; Smart Grids; Levels of Automation; ISO-OSI model; Software for industrial automation; communication protocols (speed, accuracy, determinism) and standards; automation for continuous and discrete industrial processes;

Domotics
domotics and building automation: standards and case studies

Course entry requirements

Basic electrical machines and drives; basic power converters and automatic control.

Course structure and teaching

Lectures (hours/year in lecture theatre): 50
Practical class (hours/year in lecture theatre): 40
Practicals / Workshops (hours/year in lecture theatre): 0

Suggested reading materials

W. Leonhard. Control of Electrical Drives. Springer Verlag, 1996.

L. Bonometti. Convertitori di potenza e servomotori brushless. UTET 200.

Quaderno tecnico GISI. Bus di campo tra normativa e tecnologia. GISI Milano, 2000.

P. Vas. Parameter Estimation, Condition Monitoring, and Diagnosis of Electrical Machines. Oxford University Press, 1993.

Daniele Fabrizi. Enciclopedia-Vocabolario dell'Automazione Industriale (2002). Edizioni CEI.

Testing and exams

Oral exam; a written relation on specific subjects and the interest displayed during the lectures do also contribute to the evaluation