Course detail

Electrical machines 2

FEKT-BES2Acad. year: 2011/2012

The course presents the electrical machines from the point of view of basic physical laws in relation to the theory of electrical machines. The course aims to extend the knowledge of magnetic circuits, windings, cooling and to introduce the basic principles of design of electrical machines. The students will be acquainted with finite element method with reference to analysis and design of electrical machines.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

doc. Ing. Ondřej Vítek, Ph.D.

Department

Department of Power Electrical and Electronic Engineering (UVEE)

Learning outcomes of the course unit

Ability to use the fundamental physical laws in the field of electrical machines. Deeper knowledge of magnetic circuits, windings, losses and cooling of electrical machines. Be familiar with principles of design and application of the finite element method.

Prerequisites

The subject knowledge on the secondary school level is required.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Control tests - 10 points
Computer exercises - 15 points
Final Exam - 65 points

Course curriculum

Lecture
1. Electromagnetic field, fundamental equations, introduction to Finite Element Method.
2. Losses and efficiency, materials properties.
3. Transformers, design of magnetic circuit and winding.
4. Application of modern materials, electrical machines dimensioning.
5. Principle of electromagnets, electromechanical energy conversion.
6. Construction and design of electromagnets.
7. DC machines, magnetic circuit, excitation and armature winding.
8. Permanent magnets properties and design of DC permanent magnet motors.
9. Magnetic circuit and construction of synchronous machines, generated voltage.
10. Permanent magnet synchronous machine, BLDC motor, design of magnetic circuit and winding.
11. Temperature field and cooling.
12. Design of cooling system of electrical machines.
13. Mechanical analysis for electrical machines.

Computer exercises
1. Introduction to FEMM program. Preprocessor, meshing, postprocessor.
2. Air-core coil, iron-core coil, simple magnetic circuit with one and more coils.
3. Transformer. Magnetostatic analysis.
4. Transformer. AC magnetic analysis.
5. Electromagnet in cartesian coordinates, energy, co-energy, force.
6. Electromagnet in cylindrical coordinates, effect of magnetic circuit design on electromagnet characteristics.
7. Wound-Field DC Motor.
8. Permanent Magnet DC Motor.
9. Salient pole and non-salient pole synchronous machine.
10. Permanent magnet synchronous machine and BLDC motor.
11. Thermal analysis of electrical machines.
12. Temperature field of transformer.
13. Structural analysis of the rotor.

Work placements

Not applicable.

Aims

Apply a theoretical knowledge of the 1st and 2nd year of Bachelor's study to the field of electrical machines. Provide deeper understanding of the principles of operation and contruction of electrical machines. Acquaint the students with the finite element method focusing on analysis and design of electrical machines.

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

The attendance at the all laboratory exercises is required.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Měčička, J., Hamata V., Voženílek P.: Elektrické stroje. Skriptum ČVUT v Praze, 1997. (CS)
Patočka, M.: Magnetické obvody. Elektronický učební text, FEKT, VUT Brno, 2005. (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme EECC Bc. Bachelor's

    branch B-SEE , 3 year of study, summer semester, compulsory

  • Programme EEKR-CZV lifelong learning

    branch EE-FLE , 1 year of study, summer semester, compulsory

Type of course unit

 

Lecture

13 hod., optionally

Teacher / Lecturer

doc. Ing. Ondřej Vítek, Ph.D.
doc. Ing. Radek Vlach, Ph.D.

Syllabus

1. Electromagnetic field, fundamental equations, introduction to Finite Element Method.
2. Losses and efficiency, materials properties.
3. Transformers, design of magnetic circuit and winding.
4. Application of modern materials, electrical machines dimensioning.
5. Principle of electromagnets, electromechanical energy conversion.
6. Construction and design of electromagnets.
7. DC machines, magnetic circuit, excitation and armature winding.
8. Permanent magnets properties and design of DC permanent magnet motors.
9. Magnetic circuit and construction of synchronous machines, generated voltage.
10. Permanent magnet synchronous machine, BLDC motor, design of magnetic circuit and winding.
11. Temperature field and cooling.
12. Design of cooling system of electrical machines.
13. Mechanical analysis for electrical machines.

Exercise in computer lab

39 hod., compulsory

Teacher / Lecturer

doc. Ing. Radek Vlach, Ph.D.
doc. Ing. Ondřej Vítek, Ph.D.

Syllabus

1. Introduction to FEMM program. Preprocessor, meshing, postprocessor.
2. Air-core coil, iron-core coil, simple magnetic circuit with one and more coils.
3. Transformer. Magnetostatic analysis.
4. Transformer. AC magnetic analysis.
5. Electromagnet in cartesian coordinates, energy, co-energy, force.
6. Electromagnet in cylindrical coordinates, effect of magnetic circuit design on electromagnet characteristics.
7. Wound-Field DC Motor.
8. Permanent Magnet DC Motor.
9. Salient pole and non-salient pole synchronous machine.
10. Permanent magnet synchronous machine and BLDC motor.
11. Thermal analysis of electrical machines.
12. Temperature field of transformer.
13. Structural analysis of the rotor.