Class Electrical Machines II

This curricular unit follows the programmed contents taught in Electrical Machines I. It is a curricular unit focused on the study, analysis and design of the main electromagnetic machines present in the daily life of the current society in its most diverse environments.

1. Electromechanical Energy Conversion
   1. coupling field
   2. magnetic co-energy
   3. electromagnetic forces and binaries
2. Rotating EM windings
   1. magneto-motive forces
   2. windings with discrete and sinusoidal distributions
   3. rotating field
   4. inductance
   5. voltage and current equations in the windings (VCEW)
3. Three Phase Asynchronous Machine (AM)
   1. induction matrices
   2. VCEW
   3. Clarke and Park transformations
   4. torque
4. AM equivalent steady-state (ST) model
   1. design
   2. power analysis
   3. Thevenim equivalent model
   4. torque
   5. Steady-state plots
5. Synchronous Machine (SM)
   1. induction matrices
   2. VCEW
   3. reluctance and reaction torque
   4. start-up maneuver
6. SM ST model
   1. deduction and analysis
   2. synchronous reactance
   3. power angle
   4. power analysis
   5. torque
   6. operation as a motor/generator and as a synchronous compensator
7. Special Machines
   1. stepper, reluctance, hybrid, single-phase induction and universal series motors

The weekly 4hr classroom lessons are distributed as follows: 1.5 hrs of theoretical lectures for expository purpose; 1.5hrs of practical classes, for practical problems solving and 1h of laboratory, for demonstration and experimental validation. There are 2 modalities of assessment (As):

Continuous (As) - two written tests during the lecturing period, each contributing to 35% of the final (As). Also contributing to this modality is the assessment obtained at the laboratorial component, with a weight of 30%. The approval is only possible if the average of the two written tests is greater than or equal to 10 values.

(As) by exam (ex) - Written test that covers all the taught contents, contributing to 100% of the final assessment. The (ex) is governed by the general (As) directives, being the students subscription mandatory.

Note: The described assessments can be rectified according to the results of an extraordiary oral exam that students must attend when summoned by the professor.

Galhano, A. (2021), Apontamentos de Máquina Elétricas II, ULP