1. General aspects of rotating electrical machines
1.2 Technologial aspects: degrees of protection, isolation, definition of rated power, heating and service classes.
1.3 Constructive aspects: Description of the various components of electrical machines.
1.4 Basic concepts of electromaghnetism: magnetic fields and electromotive forces applied to electrical machines
2 Synchronous machines.
2.1 Introduction. Physical constitution, cooling systems and excitation systems.
2.2 Principle of operation.
2.3 No-load and load operation. Armature reaction.
2.4 Equivalent circuit of a synchronous machine in saturated and unsaturated condition. Synchronpus impedance.
2.5 Standard tests: no-load, short-circuit and pure reactive load.
2.6 Calculation of the equivalent circuit parameters. Absolute and relative values. Short circuit ratio.
2.7 Determination of the excitation values in load mode.
2.8 Coupling to an infinete bus. Synchronization. Control of active and reactive power.
2.9 Stability limits in steady state.
2.10 Short-circuit current. Concept of subtransient and transient reactance.
2.11 Operational limits. Obtaining the operational limits chart in generator- and motor region.
2.12 Salient pole synchronous machines.
2.13 Motor operation, application and starting methods.
3. Asynchronous machine
3.1 Introduction. Constructive aspects and fundamentals.
3.2 Equivalent circuit. Description of the equivalent circuit of an asynchronous machine in steady state.
3.3 Power balance. Description of the balance of active and reactive power. Internal mechanical power and torque.
3.4 Mechanical characteristics. Deduction of the speed-torque curve and calculation of performance.
3.5 Standard tests on induction motors. No-load and short-circuit tests.
3.6 Starting methods. Direct-on-line, trnasformer, wye/delta, rotor resistances, electronic starters
3.7 Speed variation. Traditional methods of variation of speed and braking methods.
3.7 Asynchronous generator. Description of the machine in generator mode and applications.
3.8 Single phase ac motors. Description of single phase and Leblanc theorem.
4. Speed regulation of ac electrical machines.
4.1 Elements of a variable-frequency drive system.
4.2 Generation of PWM sinusoidal waves.
4.3 The equivalent circuit of the induction motor at variable frequency.
4.4 Scalar control. Constant flux (torque) range and variable flux (constant power) range.
4.5 Technological and practivcal aspects of variable speed drives.