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Politecnico di Torino
Academic Year 2009/10
01BNMDR
Electrical machines
1st degree and Bachelor-level of the Bologna process in Mechanical Engineering - Vercelli
Teacher Status SSD Les Ex Lab Tut Years teaching
Griva Giovanni Battista ORARIO RICEVIMENTO AC ING-IND/32 25 15 0 0 17
SSD CFU Activities Area context
ING-IND/32 4 T - Attivita formative caratterizzanti transitate in discipline affini o integrative Ingegneria elettrica
Objectives of the course
This course is intended to provide the basic knowledge to understand the operation and the usage of the main electric machines.
Expected skills
At the end of the course, the student will be able to compute the operating point of the studied electric machines, starting from the machine ratings and measured parameters and from load data.
Prerequisites
Basic knowledge of electromagnetics, mechanics and dynamics (from courses of Physics), knowledge of electric networks (from the course on Elecric Networks).
Syllabus
Direct Current Electric Machine: construction basics, machine equations, independent and series excitation, speed-torque characteristic, start-up and control.
Single Phase Transformer: ideal transformer, equivalent circuit of the real transformer, no-load test and short-circuit test, computation of parameters for the equivalent circuit, parallel connection.
Three Phase Transformer: equivalent circuit, tests for parameter identification on the equivalent circuit, parallel connection, group.
Induction Motor: construction basics, principle of operation, equivalent circuit, no-load test and short-circuit test, speed-torque characteristics, start-up and control.
Laboratories and/or exercises
Numeric exercises. Unmounting of small electric machines as construction examples.
Bibliography
L.Olivieri - E.Ravelli, Elettrotecnica per Elettrotecnica ed Automazione, vol.2, ed. CEDAM, 1996;
Raccolta di Esercizi di Elettrotecnica, ed. CLUT;
Bottauscio - Canova - Chiampi, Appunti ed Esercizi di Elettrotecnica - ed. Politeko.
L.Ferraris, Macchine Elettriche (2 voll.), ed. CLUT;
Revisions / Exam
The exam consits of a written test based on the subjects of exercises and of questions on the subjects of lectures.

Programma definitivo per l'A.A.2009/10
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