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Transformers and Electrical Rotating Machines SE401-15

ECTS 7 | P 45 | A 15 | L 30 | K 0 | ISVU 149339 | Academic year: 2020./2021.

Course groups

Prikaži sve grupe na predmetu

Course lecturers

FILIĆ MIRKO, Associate

Course description

Transformer and its importance in the electrical system. Transformer principles, equivalent circuit and phasor diagram. Basic types and main parts. No-load, short-circuit test and loading. Losses, heating and cooling. Three-phase transformer. Connection symbols. Transformer operation conditions. Transformer testing. Electrical machines. Synchronous machine. Basic properties and types. Physical processes, parameters and equivalent circuit of synchronous machines. Synchronous machine testing basics. Induction machine. Basic properties and types. Physical processes. Equivalent circuit, circle diagram and speed-torque curve of an induction machine. Starting, reversing and braking. Speed control. Induction machine testing basics. Single-phase induction motor. DC machine. Basic properties. Physical processes in DC machines. Types and output curves of DC machines. Small electrical machines: construction, parameters and usage. Linear motors. Laboratory practice: One-phase transformer. Basic data. No-load test. Short-circuit test. Three-phase transformer. Determining winding connection group and transformation ratio. Synchronous generator. Measurement of winding resistance. No-load test. Short-circuit test. Induction motor. No-load test. Short-circuit test. DC machine. Output curve of a separately-excited DC motor.

Knowledge and skills acquired

Understanding the working principles of transformers and electrical machines. Acquiring knowledge in construction, types and main characteristics. Acquiring knowledge for working in the field of design, switching on a drive and maintenance of transformers and electrical machines.

Teaching methods

Lectures (3 hours per week), auditory exercises (1 hour per week) and laboratory exercises (2 hours per week). Power Point presentations are used in lectures. Students actively participate in auditory and laboratory exercises and are continuously tested.

Student requirements

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Monitoring of students

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Student assessment

Two revision exams during the semester and an oral exam for students who meet the requirements defined by the Student evalution criteria (points earned in revision exams and grade awarded in design exercises). Other students must take the written and oral exam.

Obligatory literature

1. 1 R. Wolf Osnove električnih strojeva Školska knjiga, Zagreb, 1985.

2. 2 I. Mandić, V. Tomljenović, M. Pužar Sinkroni i asinkroni električni strojevi Tehničko veleučilište u Zagrebu, Elektrotehnički odjel, Zagreb, 2012.

3. 3 A. Dolenc Transformatori I i II, skripta Sveučilište u Zagrebu - Elektrotehnički fakultet, Zagreb, 1991.

4. 4 Fitzgerald, E.; Kingsley, C; . Umans, S. D. Electric Machinery McGraw-Hill. ISBN: 0-07-112-193-5, 2012.

Pretraži literaturu na:

Recommended additional literature

1. 1 A. Dolenc i drugi Transformatori, Tehnička enciklopedija, Svezak 13 Leksikografski zavod Miroslav Krleža, Zagreb, 1997.

2. 2 D. Ban Zbirka zadataka iz transformatora, skripta Sveučilište u Zagrebu - Elektrotehnički fakultet, Zagreb, 1971.

3. 3 KONČAR -grupa autora Tehnički priručnik KONČAR Elektroindustrija d.d., Zagreb, Fallerovo šetalište 22, 1991.

Examination methods

Students' evaluation during the course and oral examination for students that satisfy by scoring, written and oral examination for other students.

Course assessment

Conducting university questionnaires on teachers (student-teacher relationship, transparency of assessment criteria, motivation for teaching, teaching clarity, etc.). Conducting Faculty surveys on courses (upon passing the exam, student self-assessment of the adopted learning outcomes and student workload in relation to the number of ECTS credits allocated to activities and courses as a whole).

Overview of course assesment

Learning outcomes
Upon successful completion of the course, students will be able to:

1. interpret the principle of operation, construction parts, the role of transformer in the power system and basic operating states of the transformer (i.e. no-load, short-circuit, loaded) as well as organise measurements of these basic operating states

2. describe, draw and apply all elements of the substitute scheme and phase diagram of an electrical transformer for the purpose of calculating all quantities needed to mathematically present the replacement transformer model

3. analyze and solve the loss calculation and calculation of transformer heating and cooling based on measurements and results obtained from laboratory experiments of no load,short circuti and loaded transformer state

4. group and interpret structural performances of three-phase transformers, transformer connections, types of failures and protection of three-phase transformers

5. interpret the features, construction, types, operating modes, parameters, supplement schemes, testings and diagrams of synchronous motors and generators

6. interpret the features, construction, types, operating modes, supplement schemes, diagrams, speed regulation, starting, reversing and breaking conditions of asynchronous motors

7. interpret the features, construction, types, operating mode, supplement schemes and diagrams of DC motors and generators

8. organise, measure and perform experiments of idling, short circuit and load condition of asynchronous, DC and synchronous machines as well as analyse and calculate all values obtained by means of these experiments

Aktivnosti studenta: Vidi tablicu aktivnosti