Course detail

Electromechanical Conversion of Energy

FSI-REE Acad. year: 2022/2023 Summer semester

The basic laws of electromagnetism applied in the theory of electrical machines. Magnetic circuits of electrical machines. The basic voltage equations, equivalent circuit diagrams, phasor diagrams, the basic electrical connections of electrical machines. Energy and power flow diagrams, losses and efficiency. Torque equation. Electrical machines performance. Basic characteristics of electrical machines.

 

Language of instruction

Czech

Number of ECTS credits

5

Learning outcomes of the course unit

The students will be acquainted with the basic knowledge of electromechanical energy conversion, with basic constructional parts of electrical machines and with the principle of electrical machines operation. 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. Principle of operation and basic equations of a synchronous machine. Non-salient pole synchronous machine. Salient pole synchronous machine. Connection to the electrical grid. DC machine principle of operation. DC generators.Performance of DC motors.

 

Prerequisites

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

 

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is supplemented by laboratory and numerical exercises.

 

Assesment methods and criteria linked to learning outcomes

Three control tests, 20 points together. Credit minimum: 10 points.

Four protocols, each one for two points. Credit minimum: none of the protocols with 0 point.

Examination from numerical and laboratory exercises – 7 points. Credit minimum: 4 points.

Final exam – 65 points.

 

Aims

To acquaint the students with the principle of operation and performance of transformers, induction machines, DC machines and synchronous machines. The theoretical knowledge is proved in laboratory exercises.

 

Specification of controlled education, way of implementation and compensation for absences

Attendance at practical training is obligatory.

 

The study programmes with the given course

Programme B-MET-P: Mechatronics, Bachelor's, compulsory

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

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.
10. Synchronous machine. Principle of operation and construction.
11. Theory of non-salient 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 hours, compulsory

Teacher / Lecturer

Syllabus

1. Safety of work in the laboratory and the main parts of electrical machines.
2. Basic equations and measurement procedures.
3. Transformers.
4. Measurement of a three-phase transformer.
5. Transformers, induction machines.
6. Induction machines.
7. Measurement of an induction machine – torque-speed characteristic.
8. Measurement of an induction machine – no-load and short-circuit tests.
9. Synchronous machines.
10. DC machines.
11. Measurement of DC machines.
12. Repetition of the studied material and measurements.
13. Evaluation.