Checking date: 01/09/2022

Course: 2022/2023

Magnetic circuits and transformers
Study: Bachelor in Electrical Power Engineering (222)

Coordinating teacher: GARCIA DE BURGOS, MARIA BELEN

Department assigned to the subject: Electrical Engineering Department

Type: Compulsory
ECTS Credits: 6.0 ECTS


Requirements (Subjects that are assumed to be known)
Physics II Electrical Power Engineering Fundamentals
Skills to design electromagnetic devices. Skills to analyze the performance of a transformer under different circumstances. Skill to carry out tests to obtain transformer parameters. Basic knowledge about national and international standards. Skill to analyze interactions between the transformer and the electrical system. Skill to select a transformer for a given aplication. Explain and justify the working principle of single-phase transformers, three-phase transformers and instrument transformers and their function in power systems.
Skills and learning outcomes
Description of contents: programme
Topic 1: REVIEWING BASIC CONCEPTS ON ELECTRICITY AND MAGNETISM. Maxwell's equations. Core losses. Dielectric losses. Magnetic circuits. Self and mutual inductances. Topic 2: CONSTITUTION OF POWER TRANSFORMERS. Magnetic core, windings, insulation system. Transformer refrigeration. Basic concepts on maintenance. Topic 3: SINGLE-PHASE TRANSFORMERS. No load performance. On-load performance. Overloads. Equivalent circuit. Efficiency. Voltage drop. Parallel operation. Short circuit currents. Inrush current. Topic 4: THREE-PHASE TRANSFORMERS. Types of transformers. Phasor groups. No-load performance. Transformer performance under balanced and un-balanced loads. Zero-sequence impedance. Tertiary windings. Interconnected star windings. Three winding transformers. Autotransformers. Tap changers. Application of the different transformer types and phasor groups.
Learning activities and methodology
The learning methodology includes: - Lectures covering the main topics described within the course outline. - Case study and problem solving lectures, where some issues are addressed from a practical point of view. - Laboratory sessions
Assessment System
  • % end-of-term-examination 60
  • % of continuous assessment (assigments, laboratory, practicals...) 40
Calendar of Continuous assessment
Basic Bibliography
  • Kulkarni, S.V; Khaparde, S.A.. Transformer engineering. Design and Practice. Marcel Dekker. 2012
Recursos electrónicosElectronic Resources *
Additional Bibliography
  • S.Kulkarni; S Khaparde. Transformer Engineering. Design and Practice. Marcel Dekker. 2012
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The course syllabus may change due academic events or other reasons.

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