Design of Electrical Machines and Transformers

Data is displayed for the academic year: 2025./2026.

Lecturers

Prof.
Stjepan Stipetić
PhD
Prof.
Damir Žarko
PhD

Lectures

Assoc. Prof.
Zlatko Hanić
PhD

Laboratory exercises

Assoc. Prof.
Zlatko Hanić
PhD
Kristijan Gaži
univ. mag. ing. el. techn. inf.

Project laboratory

Prof.
Stjepan Stipetić
PhD
Prof.
Damir Žarko
PhD

Course Description

Basic principles of design and construction of electrical machines. Design algorithm. Selection of electrotechnical materials for constructions of machines and devices. Determination of main dimensions of transformers, induction machines and synchronous machines. Calculation of magnetic circuit and electric machine parameters. Capability curves, losses and efficiency. Choice of the cooling method. Thermal equivalent circuit and basic calculation of heat distribution. Scaling laws in construction of electrical machines. Computer aided design. The application of 2D and 3D finite element method in the machine design. Principles of optimization in the design. The use of standards and regulations in the design process.

Prerequisites

Fundamentals of electrical engineering, electromagnetic fields, electrical circuits, mathematics, physics, principles of electromechanical conversion, electrical machines. The courses Synchronous and Induction machines, Generators and Transformers and Computer modeling of electrical machines is a prerequisite (profile Electric Machines, Drives and Automation).

Study Programmes

University graduate
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[FER3-HR] Electrical Power Engineering - profile
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[FER3-HR] Electric Machines, Drives and Automation - profile
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[FER3-HR] Information and Communication Engineering - profile
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[FER3-HR] Software Engineering and Information Systems - profile
Elective Courses (3. semester)

Learning Outcomes

  1. Describe the construction of transformers and rotating machines
  2. Identify cooling types, mechanical protection and construction of transformers and rotating machines
  3. Explain the principles of design and construction of electrical machinery
  4. Calculate the main dimensions of transformers and rotating machines
  5. Analyze the impact of selection of parameters and dimensions of an electric machine on the output characteristics
  6. Relate magnetic circuit characteristics with the parameters of an electric machine model

Forms of Teaching

Lectures

classical lectures using blackboard in combination with PowerPoint slides

Seminars and workshops

electrical machine design project based on design requirements

Exercises

solving numerical examples related to the content of the lectures

Partial e-learning

posting study materials and communicating with students through the course website. Moodle quizzes for self-study.

Laboratory

laboratory computer exercises

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Laboratory Exercises 50 % 30 % 50 % 30 %
Seminar/Project 50 % 40 % 50 % 40 %
Final Exam: Oral 30 %
Exam: Oral 30 %

Week by Week Schedule

  1. Design methods; Standards; Limits
  2. Methods for determination of main dimensions of electrical machines
  3. Calculation of nonlinear magnetic circuit of a rotating machine
  4. Design of electric machine windings
  5. Calculation of resistances and inductances, Calculation of losses and efficiency
  6. Calculation of temperature rise in various machine parts; Basic thermal model
  7. Basic calculation of mechanical stress
  8. Midterm exam
  9. Transformer - main dimensions and design features
  10. Turbogenerator - main dimensions and design features
  11. Hydrogenerator - main dimensions and design features
  12. Induction machine - main dimensions and design features
  13. Permanent magnet synchronous machine - main dimensions and design features
  14. Scaling laws and scaling of electric machines
  15. Final exam

Literature

Juha Pyrhonen, Tapani Jokinen, Valeria Hrabovcova (2013.), Design of Rotating Electrical Machines, John Wiley & Sons
J. R. Hendershot, Timothy John Eastham Miller (2010.), Design of Brushless Permanent-magnet Machines,
Thomas A. Lipo (2017.), Introduction to AC Machine Design, John Wiley & Sons
M. Ramamoorty (1988.), Computer-Aided Design of Electrical Equipment, Ellis Horwood Limited
Z. Sirotić, V. Krajzl (1975.), Upute za proračun sinhronih strojeva, Sveučilište u Zagrebu

General

ID 269203
  Winter semester
5 ECTS
L1 e-Learning
30 Lectures
0 Seminar
0 Exercises
13 Laboratory exercises
10 Project laboratory
0 Physical education excercises

Grading System

85 Excellent
70 Very Good
60 Good
50 Sufficient

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