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Main menu for Browse IS/STAG
Course info
KEV / EST
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Course description
Department/Unit / Abbreviation
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KEV
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EST
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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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Electrical 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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127 / -
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0 / -
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2 / -
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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 |
Yes
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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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KEV/SBVSE
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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 equip the students with the knowledge of electromechanical conversions and principles of operation of electrical machines, principles and operating properties and characteristics of various types of transformers and typical rotary machines. To give the information for the understanding of the principle of operation of electrical machines with permanent magnets, reluctance machines, stepping and ultrasonic motors. To make the students acquainted with basics of the design of an electrical machine.
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Requirements on student
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Acquiring the credit: Presence at all the classes, submitting correctly processed reports. To apply the knowledges, design the machine connection, realize the connection, put given connection into operation under laboratory conditions
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Content
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Lectures:
1) Transformer - Principle of operation, equivalent circuit, loss and efficiency, magnetizing current
2) Transformer - modes of operation, no-load test, short-circuit test, load test, types of connection, equations, phasor diagrams, per unit quantities.
3) Transformer - Multiphase transformers - wiring, vector group, parallel operation
4) Electromechanical conversion - magnetic field pulsing and rotating, the rotating field in electrical machines, comparison of 2f and 3f fields.
5) Asynchronous machine - construction, principle of operation, equivalent circuit, wiring, slip, energy balance, phasor diagram.
6) Asynchronous machine - torque characteristic, starting, limitation of the starting current
7) Speed control, braking, 1-phase asynchronous machines
8) Synchronous machine-principle of operation, construction, no-load test and short circuit test, introduction of d-q coordinate system, reactance, equivalent circuit.
9) Synchronous machine - Synchronous generator in cooperation with network and self operating mode, Phasor diagram, torque characteristic, synchronous motors with permanent magnets.
10) DC Machines - Principle of operation, construction, equivalent circuit, types of DC motors, 1-phase universal motors, starting, braking, reversing.
11) Electronically controlled electric machines: Step motors, switched reluctance machine (SRM).
12) electronically controlled electric machines: Permanent magnets (PM) for electric machines - electric machines with permanent magnets, ultrasonic motors, PMSM, BLDC.
13) Motors for electronic devices, linear motors, actuators, power equation
Laboratory classes:
1. Introduction, principle of measurement, instruments
2. Theory - transformer. Design, no load test, short circuit test, the 50 vs 60 Hz network, basic calculation
3. Measurement no.1 - 3ph transformer. Resistivity measurement, no-load test, voltage ratio
4. Theory - transformer. Multi-phase transformer, Parallel operation, per unit value, basic calculation
5. Measurement no.2 - Reactive power compensation
6. Theory - asynchronous machine. Basic design, rotor description, terminal box, name-plate parameters, induced voltage, basic calculation
7. Measurement no.3 - Asynchronous machine I. Slip measurement
8. Theory - asynchronous machine. Torque relation, energy balance, currents and voltage in various winding connection, circle diagram, self-operated asynchronous generator
9. Measurement no.4 - Asynchronous machine II. No load test, resistivity measurement
10. Theory - synchronous machine. Self-operated generator and generator on the network
11. Measurement no.5 - Asynchronous machine III. Y-D comparison
12. Theory - DC machine, commutation. Permanent magnets machines, special machines
13. Conclusion, check reports
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Activities
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Fields of study
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Studentům je k dispozici elektronická verze skript, otázky s řešením pro kontrolu pochopení problematiky a další elektronické opory na COURSEWARE.
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Guarantors and lecturers
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Guarantors:
Doc. Ing. Bohumil Skala, Ph.D. ,
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Lecturer:
Ing. Vojtěch Blahník, Ph.D. (100%),
Doc. Ing. Bohumil Skala, Ph.D. (100%),
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Tutorial lecturer:
Doc. Ing. Karel Hruška, Ph.D. (100%),
Doc. Ing. Vladimír Kindl, Ph.D. (10%),
Ing. Jan Laksar, Ph.D. (100%),
Ing. Ondřej Rozhon (100%),
Doc. Ing. Bohumil Skala, Ph.D. (40%),
Ing. Martin Skalický (100%),
Ing. Lukáš Sobotka (100%),
Ing. Jan Šobra, Ph.D. (100%),
Ing. Lukáš Veg, Ph.D. (20%),
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Literature
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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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50
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Presentation preparation (report) (1-10)
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4
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Preparation for laboratory testing; outcome analysis (1-8)
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20
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Total
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74
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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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E-learning [dáno e-learningovým kurzem]
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45
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Contact hours
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20
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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: |
describe principles of resistivity measurement, voltage and current measurement |
describe the Lenz's law, Faraday laws and Kirchhoff's law |
have a good command of electrical magnitudes signage and its physical units |
have a good command of relations of physical magnitudes and its units conversion |
Skills - students are expected to possess the following skills before the course commences to finish it successfully: |
Propose the instrument connection for power measurement in 3phase network |
Analyze interaction between magnetic fields and electric current in wire |
Apply basic mathematical relations and electrical relations |
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Learning outcomes
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Knowledge - knowledge resulting from the course: |
explain the principles of operation of transformers and electrical machines |
have a good command of relations necessary for solution |
Skills - skills resulting from the course: |
apply the knowledge of the measurement in DC current circuits and perform the analysis of the electrical drive, summarize the requirements posed on it |
sketch out the scheme of a given existing connection of an electrical machine and perform the analysis of the electrical drive, summarizing the requirements placed upon it |
put the given connection into operation under the laboratory conditions |
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 |
Individual presentation at a seminar |
Skills - skills achieved by taking this course are verified by the following means: |
Practical exam |
Skills demonstration during practicum |
Competences - competence achieved by taking this course are verified by the following means: |
Practical 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 |
Skills - the following training methods are used to achieve the required skills: |
Laboratory work |
Competences - the following training methods are used to achieve the required competences: |
Students' portfolio |
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