Planeamento
Aulas Teóricas
Lesson Plan 1
The
course of
Electrical Machines.
Presentation
of the course
: objectives
, contents and how it will work
.
Introduction to
electrical machines
.
Lesson Plan 2
Magnetic
Circuit
(1)
Concept of
magnetic circuit
and
its constituent parts.
Equations
of the magnetic circuit
.
Analogy
of magnetic circuit
and electrical circuit
.
Lesson Plan 3
Magnetic
Circuit
(2)
Characterization
of the magnetic circuit
: linkage flux
, coefficient of
induction,
magnetic energy.
Losses
due to hysteresis
and
Foucault
currents
.
Saturation
of the magnetic circuit
.
Lesson Plan 4
Magnetic
Circuit
(3)
Characterization of
permanent magnets
and their use in
magnetic circuits.
Rotating electrical machines
:
magnetic circuit.
Lesson Plan 5
Windings
of rotating electrical machines
.
F.m.m. distribution of
concentrated
coils
.
F.m.m. distribution
of
a
distributed winding
.
Three-phase
double layer
winding.
Lesson Plan 6
Magnetic rotating field.
Methods for creating
magnetic rotating
fields.
Magnetic rotating field
due to
stationary
currents in
moving coils
,
pulsed
field
,
magnetic rotating field
resulting from
time-variant currents
in
stationary coils.
Lesson Plan 7
Transformer
(1)
Transformer:
review of its basic principles
.
Ideal transformer
, perfect transformer
,
actual transformer
.
Equivalent circuit
of the transformer.
Lesson Plan 8
Transformer
(2)
Three-phase transformer
: representation
through the
symmetrical components,
representation
of its balanced regime
.
Example
of analysis
and representation
under
unbalanced operation
via
a
single-phase load
.
Lesson Plan 9
Transformer
(3)
Three-phase transformer
: the type of connections
,
hourly notation, vector groups
.
Parallel of transformers
.
Lesson Plan 10
Calculation of electromagnetic forces - Method of conservation of energy . Some examples of calculation of electromagnetic forces .
Lesson Plan 11
Calculation of electromagnetic forces in converters with multiple electrical circuits . Some examples of calculation of electromagnetic forces .
Lesson Plan 12
Calculation of electromagnetic forces in converters with permanent magnets . Some examples of calculation of electromagnetic forces .
Lesson Plan 13
Dynamic model of an elementar electromechanical converter . Linearized models of electromechanical systems . Example of analysis of the operation of an electromechanical converter ( linearization and magnetic saturation ) .
Lesson Plan 14
Constructive aspects of rotating electrical machines (1) - magnetic circuit , rotating field of f.m.m. , magnetic poles.
Lesson Plan 15
Constructive aspects
of rotating electrical machines
(2) -
rotary converters with sinusoidal
structure: air-gap
model
,
the magnetic field
tangential and
radial components.
Lesson Plan 16
Constructive aspects of rotating electrical machines (3) - rotary converters with sinusoidal structure : obtaining a non-zero average torque: sunchronous machine, asynchronous machine, and the DC machine.
Lesson Plan 17
Constructive aspects of DC machines : operating principle , commutating voltage , f.m.m distribution in the air-gap , commutating poles , the armature reaction , compensating winding .
Lesson Plan 18
DC machine model in terms of lumped-parameters . Analysis of its operating characteristics under motor / generator modes for different excitation types: series, independent, compound.
Lesson Plan 19
Linearized models of the DC machine : application of the linearized model in the study of self- excited shunt generator . Applications of the DC machine .
Lesson Plan 20
Constructive solutions of the asynchronous machine: wound rotor and rotor cage; Representation of the machine by lumped- parameters (circuits ) . Asynchronous machine in continuous and balanced regime ( equivalent circuit representation ) .
Lesson Plan 21
Torque / speed characteristic. Command of the asynchronous machine (1)
Lesson Plan 22
Command of the asynchronous machine (2).
Lesson Plan 23
Constructive aspects of the synchronous machine and its operating principle. Description of the machine in terms of electromagnetic field and in terms of circuits . Representation of a synchronous machine in a rotating Cartesian reference solidarity with the rotor ( Park's model). Damper circuits .
Lesson Plan 24
Steady-state , three phase , symmetrical , balanced and direct , load angle , active and reactive powers .
Lesson Plan 25
Synchronous machine : no- load and short - circuit characteristics. Permanent-magnet synchronous motor .
Lesson Plan 26
Compensation lecture of the day 05/10/2011 .
Lesson Plan 27
Compensation of the class of problems of the day 05/10/2011 .
Aulas de Problemas
Problems classe 1
Groups (1) and (2).
Revison problems.
Problems classe 2
Group (1).
Magnetic circuit problems.
Problems classe 3
Group (2).
Magnetic circuit problems.
Problems classe 4
Group (1).
Transformer problems.
Problems course 5
Group (2).
Transformer problems.
Problems classe 6
Group (1)
Electromagnetic force problems.
Problems classe 7
Group (2).
Electromagnetic force problems.
Problems classe 8
Group (1)
DC machine problems.
Problems classe 9
Group (2)
DC machine problems.
Problems classe 10
Group (1)
Asynchronous Machine problems.
Problems classe 11
Group (2).
Asynchronous machine problems.
Problems classe 12
Group (1).
Synchronous machine problems.
Problems classe 13
Group (2)
Synchronous machine problems.