Course detail

Selected Chapters of Electroengineering

FSI-RE0Acad. year: 2024/2025

The course deals with the basic laws of electromagnetism applied to the theory of electrical machines. Also discussed are the following topics: Magnetic circuits of electrical machines. Basic voltage equations, equivalent circuit diagrams, phase diagrams, the basic electrical connections of electrical machines. Energy and power flow diagrams, losses and efficiency. Torque equation. Electrical machines' performance. Nonsymmetrical loading. Influence of higher harmonics. Basic characteristics of electrical machines.

Language of instruction

Czech

Number of ECTS credits

2

Mode of study

Not applicable.

Guarantor

doc. Ing. Ondřej Vítek, Ph.D.

Department

Institute of Solid Mechanics, Mechatronics and Biomechanics (ÚMTMB)

Entry knowledge

Basic laws and terminology of electrical and mechanical engineering. Three-phase systems.

Rules for evaluation and completion of the course

Control tests - 20 points
Individual projects - 15 points
Written and oral exam - 65 points
Attendance at practical training is obligatory.

Aims

The course is intended for students majoring in branches other than mechatronics. The aim is to acquaint the students with the principles of operation and performance of transformers, induction machines, DC machines and synchronous machines. The theoretical knowledge is verified in laboratory exercises.
Students will acquire basic knowledge of electromechanical energy conversion, and will be made familiar with basic constructional parts of electrical machines, as well as principles of electrical machines operation. Also dealt with are the following topics: Single-phase and multiphase transformers. Parallel operation. Three-phase induction motor. Generation of revolving magnetic field. Torque characteristic, starting of induction motors. Single-phase induction motor. Three-phase induction motor on single-phase mains. DC machine principle of operation. DC generators. Performance of DC motors.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Fitzgerald,Kingsley,Kusko:Electric Machinery,McGraw-Hill
Měřička,Haňka,Voženílek.:Elektrické stroje,ČVUT Praha
O'Kelly:Performance and Control of Electrical Machines,McGraw-Hill

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme N-MET-P Master's 1 year of study, winter semester, elective

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Ondřej Vítek, Ph.D.

Syllabus

1. Basic laws of electromagnetism related to electrical machines.
2. Principle of electromechanical energy conversion.
3. Transformers. Ideal transformer, actual transformer, basic equations.
4. Principle of operation and construction of power transformers.
5. Three-phase transformers, winding connection, parallel operation.
6. Magnetic circuit and winding of electrical machines. Principle of operation of induction machine, generation of revolving magnetic field.
7. Equivalent circuit diagram, fundamental equations and torque characteristics.
8. Starting of induction machines speed control.
9. Single-phase induction machine. Three-phase induction machine in single-phase mains. The higher harmonics influence.
10. Synchronous machine. Principle of operation and construction.
11. Theory of nonsalient machine. Torque characteristic, synchronous machine with individual load and parallel operation.
12. DC machines. Principle of operation and construction, fundamental equations.
13. DC machines steady state performance.

Laboratory exercise

26 hod., compulsory

Teacher / Lecturer

doc. Ing. Ondřej Vítek, Ph.D.

Syllabus

1. Work safety and the main parts of rotary electrical machines. Assembly and disassembly of electrical machines.
2. Principle of torque measurement, dynamometer.
3. No load a short circuit transformer test.
4. Winding connection. Load test and efficiency, measurement of a transformer.
5. Three-phase induction motor. Winding connection. No load and blocked rotor test. Induction motor parameter determination.
6. Measurement of induction motor torque characteristics.
7. Induction motor starting.
8. Synchronous machine parallel operating with mains.
9. Measurement of torque characteristics.
10. Parameter determination of synchronous machine with salient poles and with nonsalient rotor.
11. DC machine. No load test. Self-excitation of shunt generator.
12. Connection of DC motor to mains. Speed control characteristics of DC motors.
13. Evaluation.