Course detail

Production of Electrical Machines 2

FEKT-MPC-SS2Acad. year: 2021/2022

Introduction to electromagnetic resistance networks and thermal networks. Calculating the parameters of the electrical machine from the resistance network. Calculating the parameters of the electric machine using the FEM. Introduction to the basic approaches of the thermal design of the electric machine. Calculation of steady and transient temperatures in the machine by means of thermal networks.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Learning outcomes of the course unit

Subject graduate should have been able:
- analyze the electromagnetic field in synchronous and synchronous machine using resistance network methods,
- analyze the electromagnetic field in synchronous and synchronous machine using FEM,
- optimize the electrical machine from an electromagnetic point of view,
- explain the issue of heat dissipation and cooling in an electrical machine,
- construct a thermal network of an electric machine,
- analyze the temperature distribution in an electrical machine,
- optimize the electric machine from a thermal point of view.

Prerequisites

Student should have been able to:
- explain electromagnetic basic principles, solve DC, AC electric circuits with lumped parameters and magnetic circuits,
- differentiate functions of one and more variables,
- integrate functions of one and more variables,
- solve transients in linear and nonlinear circuits using Matlab Similink,
- explain principle of operation and properties of electromagnets, transformers, induction, synchronous and DC machines.

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

Requirements for completion of a course are specified by a regulation issued by the lecturer responsible for the course and updated for every.

Course curriculum

Lectures:
1. Introduction, motivation, basic elements of a 2D resistive network.
2. Construction of resistance network for an electric machine, calculation of magnetic induction in the air gap, calculation of induced voltage.
3. Calculation of electrical machine parameters from the resistance network.
4. Use of numerical methods for analysis of electrical machines.
5. Modeling and calculation of an induction machine in ANSYS Maxwell.
6. Modeling and calculation of a synchronous machine in ANSYS Maxwell.
7. Introduction to thermal calculations of electrical machines.
8. Fundamental forms of heat transfer.
9. Introduction to the issues of thermal flow in electrical machines.
10. Modeling of hydraulic circuits of electric machines.
11. Calculations of thermal resistance of individual parts of electric machines.
12. Thermal network method.
13. Transient thermal calculation of the electrical machine.


Numerical and computer exercises
1. Calculation of resistance networks.
2. Construction of resistance network for an electric machine, calculation of magnetic induction in the air gap and calculation of induced voltage in MATLAB.
3. Calculation of electrical machine parameters from the resistance network in MATLAB.
4. Introduction to ANSYS Maxwell.
5. Modeling and calculation of an induction machine in ANSYS Maxwell.
6. Modeling and calculation of a synchronous machine in ANSYS Maxwell.
7. Basic heat transfer calculations.
8. Calculation of heat transfer coefficients.
9. Calculation of hydraulic circuits.
10. Calculation of thermal resistances.
11. Calculation of temperature in a transformer.
12. Calculation of warming of rotating electric machines.
13. Thermal calculation of electrical machines in ANSYS.

Work placements

Not applicable.

Aims

Deepening knowledge of design of electric machines with a focus on electromagnetic and thermal calculations. The student should be able to optimize the electrical machine not only from the point of view of the electromagnetic field but also from the temperature field.

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

The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

ÇENGEL, Yunus A. a Afshin J. GHAJAR, 2015. Heat and mass transfer. Fifth edition. New York, NY: McGraw Hill Education. ISBN 00-733-9818-7. (EN)
PYRHONEN, Juha., Tapani JOKINEN a Valeria. HRABOVCOVÁ, 2014. Design of rotating electrical machines. Second edition. Chichester, West Sussex, United Kingdom: Wiley. ISBN 9781118581575. (EN)
Greg C. Stone , Ian Culbert , Edward A. Boulter , Hussein Dhirani, Electrical Insulation for Rotating Machines : Design, Evaluation, Aging, Testing, and Repair, ISBN 9781118057063 (EN)
Wei Tong, Mechanical Design of Electric Motors, ISBN 9781420091434 (EN)
Yunus Cengel, Afshin Ghajar, Heat and Mass Transfer: Fundamentals and Applications, ISBN 978-0073398181 (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme MPC-SVE Master's, 2. year of study, winter semester, compulsory-optional

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

Fundamentals seminar

13 hours, compulsory

Teacher / Lecturer

Exercise in computer lab

13 hours, compulsory

Teacher / Lecturer