Course detail
Electrical Machines
FEKT-HESBAcad. year: 2018/2019
1) Seminar - introduction
2) Electromechanical energy conversion
3) Transformers - theory, equivalent circuit diagram
4) Transformers - transformer tests, working conditions
5) Induction machines - theory, princip of operation
6) Induction machines - equivalent circuit diagram
7) Induction machines - torque equations, working conditions
8) Synchronous machines - princip of operation, equivalent circuit diagram
9) Synchronous machines - working charakteristics, cooperation with grid
10) DC machines - principle of operation, basic equations
11) DC machines - equivalent circuit diagram, working conditions
12) Seminar
13) Seminar
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Learning outcomes of the course unit
- describe main parts of electric machines,
- know classes of insulation and electrical machines costruction,
- describe construction of transformer,
- explain transformer losses,
- understand and explain single and multiphase transformer operation,
- calculate parameters of transformer equivalent circuit from no-load and short – circuit tests,
- draw and explain phasor diagrams of transformer at no load, at short circuit and generally loaded.
- transformer winding connection and phasor diagram for different hour angle,
- explain and calculate transformer voltage regulation,
- describe and explain construction and principle of operation of induction machine with wound rotor and with squirrel cage,
- describe revolving magnetic field generation,
- define basic kinds of AC machine windings,
- sketch curve of magnetic field of AC winding distributed in more slots,
- draw equivalent induction machine circuit diagram, derive torque equation and draw torque - speed characteristic ,
- describe connection of induction motor into public utility network and speed control,
- describe construction and principle of operation of single phase induction motor,
- describe principle operation and construction of nonsalient synchronous machine,
- draw simplified circuit diagram, derive torque equation and draw phasor diagram,
- explain synchronous generator operation with isolated load and with public utility network, use phasor diagram for explanation,
- explain synchronous compensator principle of operation,
- describe DC machine construction and principle of operation,
- describe basic types of DC machine windings,
- derive torque and induced voltage equations,
- explain properties of DC motors and generators,
- describe construction and explain principle of operation of AC single phase commutator machines.
Prerequisites
-explain and define basic terms magnetic field, electric field, magnetic field, circuits with lumped and distributed parameters,
- solve DC, AC and magnetic circuits,
- solve three phase AC circuits,
- define the terms work and energy,
- describe and explain basic properties soft and hard magnetic materials.
Co-requisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
Final Exam - 70 points
Course curriculum
Synchronous machines - working charakteristics, cooperation with grid. DC machines - princip of operation, basic equations. DC machines - equivalent circuit diagram, working conditions. Seminar
Work placements
Aims
Specification of controlled education, way of implementation and compensation for absences
Recommended optional programme components
Prerequisites and corequisites
Basic literature
Měřička,Haňka,Voženílek.::Elektrické stroje,ČVUT Praha
O'Kelly:Performance and Control of Electrical Machines,McGraw-Hill
Recommended reading
Classification of course in study plans