Czech

Not applicable.

Graduate of the course is able to
- describe, modify and apply the basic design approach of magnetic circuit and winding to the transformer, permanent magnet DC motor and BLDC motor,
- modify the magnetic circuit and winding of the transformer, electromagnet, permanent magnet DC motor and BLDC motor to meet the required parameters,
- calculate the parameters of the transformer, electromagnet, permanent magnet DC motor, BLDC motor and permanent magnet synchronous motor (steady-state operation),
- explain, calculate and apply the fundamental design factors,
- draw and describe the waveform of magnetic flux density in the air-gap of permanent magnet DC motor, BLDC motor and permanent magnet synchronous motor (PMSM); sketch the slotting effect and the armature reaction effect,
- draw and explain the waveform of the back-emf of DC motor,
- describe the construction, driving and control of BLDC motor and PMSM,
- draw and explain the waveform of the back-emf and idealized phase currents of BLDC motor and PMSM,
- prepare 2D FEM model of the transformer, electromagnet, permanent magnet DC motor, BLDC motor under steady-state operation; compare the results
- prepare basic program using LUA language to control the FEMM program and model.

The subject knowledge on the secondary school level is required and student should also be able to
- define and explain terms: self and mutual inductance; energy of coil and set of coils; energy density; forces in magnetic field,
- identify the materials usually employed in design of common electrical machines, describe their properties and draw their basic characteristics,
- describe the construction of transformer, electromagnet, DC machine with excitation winding and synchronous machine with excitation winding,
- explain the fundamentals of operation of transformer, electromagnet, DC machine with excitation winding and synchronous machine with excitation winding,
- identify and explain the losses in transformer, DC machine with excitation winding and synchronous machine with excitation winding,
- draw and explain the equivalent circuit of transformer, calculate its parameters from measured values,
- identify the common types of armature winding of DC machines, describe their properties, advantages, disadvantages,
- describe and explain the DC motor commutation process,
- explain the term of armature reaction,
- describe the basic properties of three-phase windings, explain the occurrence of rotating magnetic field.

Not applicable.

Teaching methods include lectures and computer laboratories. Course is taking advantage of e-learning (Moodle) system. Students have to write two projects/assignments during the course.

Control test - maximum 15 points
Computer exercises - maximum 15 points
Final Exam - maximum 70 points; to pass the exam it is necessary to gain at least 30 points.

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 permanent magnet synchronous machines and BLDC motor, generated voltage.
10. 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. Permanent Magnet DC Motor - design.
8. Permanent Magnet DC Motor - FEMM model.
9.BLDC motor - design.
10.BLDC motor - FEMM model.
11. Thermal analysis of electrical machines.
12. Temperature field of transformer.
13. Structural analysis of the rotor.

Not applicable.

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.

The attendance at the all laboratory exercises is required.

Not applicable.

Not applicable.

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)

Not applicable.