453-0301/01 – Electrical Machines III (ES 3)
Gurantor department | Department of Electrical Machines and Apparatus | Credits | 8 |
Subject guarantor | doc. Ing. Pavel Hrbáč, Ph.D. | Subject version guarantor | doc. Ing. Pavel Hrbáč, Ph.D. |
Study level | undergraduate or graduate | Requirement | Choice-compulsory |
Year | 2 | Semester | winter |
| | Study language | Czech |
Year of introduction | 2003/2004 | Year of cancellation | 2009/2010 |
Intended for the faculties | FEI | Intended for study types | Master |
Subject aims expressed by acquired skills and competences
Graduate be able measure to transient actions in electrical machines and be able to measure and weigh evidence.
Students learn solve transient action in electrical machines, can calculation magnetic circuits, losses and efficiencies electrical machines. Students learn measure on electrical machines by non-sinusoidal power supply.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Project work
Other activities
Summary
Course presents the transient states of electric machines, calculation of
resistances, reactances and losses some types of machines, design of winding
and magnetic circuits of rotating machines. Electrical machines are measured in laboratory at transient state and by nonsinusoidal supply.
Compulsory literature:
S.V Kulkarni:Transformer enginneering, Design and practise, Marcel Dekker, New York, 2004
J. Hindmarsh, Eletrical Machines and their applications, Pergamon Prees Oxford, 1971
Peter Vas: Parameter estimation, condition monitoring and diagnosis of eletrical machines, Clarendon Press, Oxford 1993
Recommended literature:
J. Hindmarsh, Eletrical Machines and their applications, Pergamon Prees Oxford, 1971
Way of continuous check of knowledge in the course of semester
Conditions for credit:
Punctual appreciation
Participation on all laboratory exercises
Elaboration of all documentation from laboratory exercises
Successful test
E-learning
Other requirements
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
Magnetic circuit of three-phase transformer
Nonlinear phenomena in transformer
Cut off on transformer connexion in net.
Calculation leakage winding reactance
Windings direct-current machines, vector star and voltage polygon, equations of windings, loop and wave windings
Windings of alternate machines, factor winding, diagram of slotted voltages
Tinley's winding diagram and Goegresses diagram, rotor winding of asynchronous machines
Equivalent circuit and circle diagram asynchronous machine from calculated values.
Reactances and resistances calculation of electrical machines, differential leakage
Magnetic circuit calculation of synchronous and asynchronous machines
Calculation of no-load circuit characteristic and exciting winding of synchronous machine, excitation systems
Losses calculation of electrical machines, losses in copper, in iron, mechanic losses and auxiliary losses
Determination of exciting current in loading synchronous machine.
Characteristic of synchronous machines.
Circle diagram of synchronous machine
Exercises:
Submission of semester work, requirements on conferment of credits
Influence on circle diagram and losses
DC windings, loop and wave windings, voltage polygon, coupler of I. and II.order
Tinley´s winding diagram and Goerges´es diagram, running of magneto motive force in air space, factor differential leak
Credit exercise
Laboratories:
Apprise of laboratory equipments safety regulations
Measurement on transformer - asymmetrical load
Measurement on transformer - closing no-load
on induction motor power supply from frequency convertor
Impedance circle diagram of induction motor
Projects:
It is submit self work, which students work up in time out of tutorial. Projects are calculations, drawing documentation and technical documentation from laboratory exercises.
Computer labs:
Exciting current, transformer calculation, resistances of primary and secondary winding, reactance's calculation and short-circuit voltage
Introduction to transformer calculation, temperature classes, isolation classes selection, cooling, plating, material of windings, design of mag. circuits, selection of magnetic induction, active cross-section of mag. circuit, selection of numbers core steps, parallel sub-circuits, height of transformer window, insulating distance
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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