Course code ETeh3001

Credit points 2

# Electrical Engineering and Electronics

Total Hours in Course80

Number of hours for lectures16

Number of hours for laboratory classes16

Independent study hours48

Date of course confirmation29.11.2011

Responsible UnitInstitute of Energetics

### Course developer

Enerģētikas institūts

## Liene Kanceviča

Dr. sc. ing.

### Course abstract

The course consists of two parts. Electrical engineering covers basic concepts of direct current, single and three phase alternating current circuits, magnetic circuits, methods of engineer analysis are presented. In laboratory students learn electrical safety; methods of electrical measurement; connecting to the grid, capturing and analyzing operation parameters of electrical devices. Electronic part presents theoretical introduction to analogous and switch-mode electronic devices. In laboratory semiconductor electronic elements, various diodes and transistors are studied.

### Learning outcomes and their assessment

Knowledge: operating principles and use of electrical and electronic equipment – exam;
Skills: to choose research and calculation methods corresponding to a specific research, substantiating their choice, to interpret the results of data processing – test; to formulate and critically evaluate the basic issues of electrical engineering and electronics, to connect various types of electrical equipment to the network, to perform measurements and theoretical calculations of the operating parameters of electrical systems – practical and laboratory works;
Competence: to orientate in electrical and electronic equipment and systems, electrical measurements and calculations, to analyze calculation results – exam.

### Course Content(Calendar)

1 Introduction. Electrical safety. Exposure to electric current. 1 h
2 Basic concepts of electrical engineering and electronics. The main components of electrical circuits, characteristics, measurement of electrical quantities. 1 h
3 DC and AC. Basic laws and operating modes. 1 h
Homework 1 - Electric circuit operating modes.
Test 1 Test on the subject learned in lectures. 1 h
4 Magnetic circuits. Electromagnetic induction 1 h
5 Sinusoidal alternating current - its generation and characteristics. Calculation methods of electrical circuits. 1 h
Homework 2 - Series connection: active, inductive, capacitive resistance.
6 Concepts of electrical resistance and power of AC circuits. 1h
Homework 3 - Parallel connection: active, capacitive and inductive resistors.
7 Three-phase electrical systems. Stars and triangles. 1 h
Test 2 Test on the subject learned in lectures. 1 h
8 Transformers. Construction and operating principle of asynchronous machine. Mechanical characteristic of an asynchronous machine. 2 h
9 Electrical networks. The concept of electricity supply. 1 h
Test 3 Test on the subject learned in lectures.1 h
10 Basic elements of electronic equipment. AC rectifiers and filters. 1 h
11 Introduction to the theory of electric semiconductors. Electronic switches. Electronic signal amplifiers and generators. Pulse equipment. 2h
Laboratory works:
1. Safety equipment and electrical safety instruction – 1h.
2. Electrical equipment connection to the network – 1h.
3. Measurement of current, voltage, power and energy in single-phase network, application of current measuring transformer – 2h.
4. I, U, P, Q, S, cosφ complex measurement. Electrical resonance (with graphic part) – 1h.
5. Investigation of three-phase network star and triangle circuit (with graphic part) – 2h.
6. Three-phase active power measurement – 1h.
7. Transformer research – 2h.
8. Research of asynchronous machine, determination of stator winding ends – 2h.
9. Starting the asynchronous motor with a contactor and switching the stator Y-Δ (Ip measurement) – 2h.
10. Electric drive control, control redundancy, reversal and single-phase mode – 2h.

### Requirements for awarding credit points

Written exam.
Exam consists of:
Two questions of the theoretical part;
The task of the topics learned in the study course in practical works;
The student is admitted to the examination only if all tests are counted.

### Criteria for Evaluating Learning Outcomes

Evaluation of study results is based on the student's answers during the examination. It is also possible to get a maximum rating of 10 (excellent) if all the work is done on time, and the student has given the appropriate knowledge.

1. Lagzdiņš Ģ.E. Pamatkurss elektrotehnikā: mācību līdzeklis. Rīga: Jumava, 2004. 219 lpp.
2. Klegeris I.Ž. Lietišķā elektrotehnika. 1.daļa/lekciju konspekts. LLU TF LEI. Jelgava, 2007. 82 lpp.
3. Bunžs Z. Elektronikas pamati. Rīga: Drukātava, 2010. 164 lpp.
4. Leščevics P., Galiņš A. Elektronika: Mācību metodiskais līdzeklis. Jelgava: LLU, 2008. 58 lpp.