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Course info
KEV / TES
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Course description
Department/Unit / Abbreviation
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KEV
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TES
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Academic Year
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2024/2025
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Academic Year
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2024/2025
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Title
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Theory of Electric Machines
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Form of course completion
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Exam
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Form of course completion
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Exam
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Accredited / Credits
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Yes,
5
Cred.
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Type of completion
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Combined
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Type of completion
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Combined
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Time requirements
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Lecture
3
[Hours/Week]
Tutorial
2
[Hours/Week]
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Course credit prior to examination
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Yes
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Course credit prior to examination
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Yes
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Automatic acceptance of credit before examination
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Yes in the case of a previous evaluation 4 nebo nic.
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Included in study average
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YES
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Language of instruction
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Czech, English
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Occ/max
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Automatic acceptance of credit before examination
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Yes in the case of a previous evaluation 4 nebo nic.
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Summer semester
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0 / -
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0 / -
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0 / -
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Included in study average
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YES
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Winter semester
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0 / -
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50 / -
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0 / -
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Repeated registration
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NO
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Repeated registration
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NO
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Timetable
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Yes
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Semester taught
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Winter semester
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Semester taught
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Winter semester
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Minimum (B + C) students
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10
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Optional course |
Yes
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Optional course
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Yes
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Language of instruction
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Czech, English
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Internship duration
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0
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No. of hours of on-premise lessons |
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Evaluation scale |
1|2|3|4 |
Periodicity |
každý rok
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Evaluation scale for credit before examination |
S|N |
Periodicita upřesnění |
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Fundamental theoretical course |
No
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Fundamental course |
No
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Fundamental theoretical course |
No
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Evaluation scale |
1|2|3|4 |
Evaluation scale for credit before examination |
S|N |
Substituted course
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None
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Preclusive courses
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N/A
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Prerequisite courses
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N/A
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Informally recommended courses
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N/A
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Courses depending on this Course
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N/A
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Histogram of students' grades over the years:
Graphic PNG
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XLS
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Course objectives:
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To variegate any fundamental theoretical knowledge (learned during courses KEV/ES) of a mathematical description of all the important physical phenomena important for rotating and non-rotating electrical machines. To acquaint students with step-by-step derivation and correct interpretation of mathematical models of basic types of electric machines. Explain the principles of the operation of electric machines and discuss their electrical properties and fundamental electrical / mechanical influences on other devices (electrical network, load, ...).
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Requirements on student
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Credit acquiring: Attendance at all laboratories, commiting all laboratory reports, possible final test.
The final exam is conducted in a combined form, written preparation + the following discussion.
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Content
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Program of lectures:
1) ELECTROMECHANICS: Basic theories of electromechanical transformations, multi-winding system, energy / coenergy, forces.
2) ELECTROMECHANICS: Moving systems, energy balance and forces, application to the moving and rotating system, transformation and movement induced voltage.
3) Transformers: equivalent circuit (losses and efficiency), voltage drop - short circuit voltage, transient phenomena (sudden short circuit, start-up current).
4) Transformers: Three-phase transformers, magnetizing current (influence of winding connection), Autotransformers, parallel cooperation of transformers.
5) Rotating machines: Rotating magnetic field (2-phase, 3-phase), basic view of three-phase winding, winding factor, space harmonics.
6) Induction machine: Basic structure - properties and usage, equivalent circuit, transformation of equivalent circuit into gamma-shape form, factor c1.
7) Induction machine: Voltage ration, losses and efficiency, energy balance during acceleration, torque characteristic as depend on slip and speed, circular inversion of the impedance line.
8) Induction machine: Start-up, soft start, Y-D, braking, speed control u/f, PWM principle in relation to the machine.
9) Synchronous machine: Basic design - properties and usage, equivalent circuit for non-salient rotor, synchronous reactance, g-ratio, phasor diagram for non-salient rotor, short-circuit ratio.
10) Synchronous machine: Mathematical model, overloading, synchronization torque, machine on the grid, circle diagram, standalone generator.
11) Synchronous machine: Decomposition on d-q component (equivalent circuit and phasor diagram with Xd and Xq), torque characteristic and machine performance, PM machines.
12) DC machines: Basic construction - properties and usage, purpose of individual windings, losses and efficiency, induced voltage and torque of the machine, characteristics according to the connection.
13) DC machines: classical commutation, electronic commutation in relation to EC motors, BLDC motor.
Laboratories
1) Introduction to laboratory regulations and safety regulations, conditions for granting credit
2) Transformers: No-load and short-circuit test measurement, winding resistance measurement, transformer voltage ratio, measurement of self- and mutual- inductances.
3) Transformers: determination of the parameters of the substitution scheme from the measurement (comparison with the self-inductance and mutual inductance)
4) Autotransformers: Measurement of self- and mutual- inductances ATR (for substitution diagram).
5) Induction machines: No-load and short-circuit test measurement, voltage ratio of the machine
6) Induction machines: current diagram, determination of the parameters of the substitution scheme from measurement
7) Synchronous machine: No-load and short-circuit test measurement
8) Synchronous machine: Measurement of machine reactances
9) Synchronous machine: connection to the grid, loading characteristics of the machine
10) Synchronous machine: determination of the current ration based on measurement, overloading, phasor diagram on a scale
11) DC machine: Dynamo loading
12) DC machine: DC motor loading
13) Recapitulation and discussion
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Activities
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Fields of study
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Studentům je k dispozici rozsáhlá knihovna elektronických přednášek a výuková videa umístěná na YT kanálu FEL.
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Guarantors and lecturers
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Guarantors:
Doc. Ing. Vladimír Kindl, Ph.D. ,
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Lecturer:
Doc. Ing. Vladimír Kindl, Ph.D. (100%),
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Tutorial lecturer:
Ing. Radek Čermák (25%),
Ing. Zdeněk Frank (25%),
Doc. Ing. Karel Hruška, Ph.D. (100%),
Doc. Ing. Vladimír Kindl, Ph.D. (100%),
Ing. Jan Laksar, Ph.D. (25%),
Ing. Martin Skalický (100%),
Ing. Lukáš Veg, Ph.D. (25%),
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Literature
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Basic:
Bašta, Jan; Chládek, Jaroslav; Mayer, Imrich. Teorie elektrických strojů. 1. vyd. Praha : SNTL, 1968.
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Basic:
Bartoš, V. Teorie elektrických strojů. Plzeň, 2006. ISBN 80-7043-509-7.
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Recommended:
Juha Pyrhonen, Tapani Jokinen, Valeria Hrabovcova. Design of Rotating Electrical Machines, 2nd Edition. Wiley, 2013. ISBN 978-1-118-58157-5.
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Recommended:
Charles Kingsley, Stephen Umans, A Fitzgerald. Electric Machinery, 7th edition. Humanities & Social Sciences, 2013. ISBN 978-0073380469.
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On-line library catalogues
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Time requirements
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All forms of study
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Activities
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Time requirements for activity [h]
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Preparation for an examination (30-60)
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45
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Preparation for laboratory testing; outcome analysis (1-8)
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8
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Preparation for comprehensive test (10-40)
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15
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Total
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68
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Combined form of study
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Activities
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Time requirements for activity [h]
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Contact hours
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20
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E-learning [dáno e-learningovým kurzem]
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45
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Total
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65
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Full-time form of study
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Activities
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Time requirements for activity [h]
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Contact hours
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65
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Total
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65
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Prerequisites
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Knowledge - students are expected to possess the following knowledge before the course commences to finish it successfully: |
explain the principle of the operation of basic electrical machines |
draw the magnetic field distribution in a specified magnetic circuit geometry |
Skills - students are expected to possess the following skills before the course commences to finish it successfully: |
to analyze a simple electrical circuit |
using a symbolic-complex method |
Competences - students are expected to possess the following competences before the course commences to finish it successfully: |
N/A |
N/A |
N/A |
N/A |
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Learning outcomes
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Knowledge - knowledge resulting from the course: |
to define basic principles of electromechanical transformation |
to explain the principles of electric machines and their behavior under specific conditions using verbal, graphic and mathematical description |
to explain key physical processes that affect electrical machines behaviour and to discuss their interrelationships |
Skills - skills resulting from the course: |
to perform basic measurements on an electrical machine |
Competences - competences resulting from the course: |
N/A |
N/A |
N/A |
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Assessment methods
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Knowledge - knowledge achieved by taking this course are verified by the following means: |
Combined exam |
Test |
Skills - skills achieved by taking this course are verified by the following means: |
Combined exam |
Skills demonstration during practicum |
Competences - competence achieved by taking this course are verified by the following means: |
Combined exam |
Skills demonstration during practicum |
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Teaching methods
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Knowledge - the following training methods are used to achieve the required knowledge: |
Lecture supplemented with a discussion |
Laboratory work |
Skills - the following training methods are used to achieve the required skills: |
Lecture with visual aids |
Laboratory work |
Competences - the following training methods are used to achieve the required competences: |
Lecture supplemented with a discussion |
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