Course code ETeh4037

Credit points 3

Total Hours in Course120

Number of hours for lectures16

Number of hours for seminars and practical classes24

Number of hours for laboratory classes8

Independent study hours72

Date of course confirmation06.01.2015

Responsible UnitInstitute of Energetics

Enerģētikas institūts
## Ainārs Galiņš

Dr. sc. ing.

Fizi2032, Physics I

Fizi2033, Physics II

Mate1029, Mathematics I

Mate1030, Mathematics II

Mate2034, Mathematics III

Mate2035, Mathematics IV

The aim of the study course is to acquire knowledge of the theoretical bases of electrical knowledge. Familiarity with linear DC circuits and techniques for calculating electrical circuits, non-linear DC circuits, their characteristics, applications and calculations, looks at magnetic circuits, their breakdown, materials, calculations. The physical nature of the sinusoidal current and its characteristics. Methods for calculating alternating circuits - the symbolic calculation method, vector chart.

Knowledge - in theoretical fundamentals of electrical engineering and the theory of calculation of electrical circuits, understanding of physical processes in electrical circuits - test, laboratory works

Skills - to perform electrical calculations - tests.

Competence - to calculate and evaluate the operation of electrical circuits - tests.

**Full time intramural studies:**

1. Introductory lecture. Ohm’s Law. Kirhof's laws (Lecture - 1h).

2. Serial and parallel connections. Power calculation (Lecture - 1h).

3. Proportional-value method for calculating electrical circuits. Power balance (Lecture - 1h, Practical work - 2h).

Test 1: Proportional-value method (Practical work - 2h).

4. Contour current method for electric circuit calculations. Determinants, their use (Lecture - 1h, Practical work - 2h).

Test 2: Contour current method (Practical work - 2h).

5. Superposition method for electric circuit calculations. Principle of overlap (Lecture - 1h, Practical work - 2h).

Test 3: Superposition method (Practical work - 2h).

6. Replacing the parallel branches containing the EDS source with an equivalent branch (Lecture - 1h).

7. Two-Knot Method for Calculating Electrical Circuits (Lecture - 1h, Practical work - 2h).

Test 4: Two-Knot Method (Practical work - 1h).

8. Knot Potential Method for Calculating Electrical Circuits (Lecture - 1h, Practical work - 2h).

Test 5: Knot Potential Method (Practical work - 3h).

9. Nonlinear DC Circuits, Characteristics (Lecture - 1h).

10. Calculations of non-linear DC circuits (Lecture - 1h).

11. Magnetism. Magnetic Circuits. Magnetic materials (Lecture - 1h).

12. Calculations of magnetic circuits (Lecture - 1h, Practical work - 2h).

Test 6: Calculations of magnetic circuits (Practical work - 2h).

13. Sinusoidal alternating current (Lecture - 1h).

14. Sinusoidal AC circuits, their calculations (Lecture - 1h).

15. Symbolic method, complex numbers of vector algebra (Lecture - 1h).

16. Voltage and current resonance (Lecture - 1h).

Laboratory Works:

1. Topology of substitution schemes -1h.

2. Scheme Elements and Parallel Connections -1h.

3. Indication of voltages and currents -1h.

4. DC circuit with variable load -1h.

5. Sinusoid parameters -1h.

6. Addition of sinusoids -1h.

7. Multiplication of sinusoids, active power -1h.

8. RLC circuit in AC circuit -1h.
**Part time extramural studies:**

All topics specified for full time studies are accomplished, but the number of contact hours is one half of the number specified in the calendar

Test.

Accumulative test, all tasks completed.

Regular attendance (at least 75%), tests, laboratory works and independent assignments.

Pre-test homework (control type - test):

1. Proportional Value Method;

2. Contour current method;

3. Superposition method;

4. Two-knot method;

5. Node Potential Method;

6. Calculation of the magnetic circuit.

Quality of work performance. Understanding what you have done. Ability to logically justify processes and explain the causes of errors. Ability to discuss what you have learned.

1. A. Galiņš. Elektrozinību teorētiskie pamati. Elektrisko ķēžu aprēķini. Mācību metodiskais līdzeklis. Jelgava: LLU, 2008. 120 lpp.

2. Elektrotehnikas teorētiskie pamati: Stacionāri procesi lineārajās ķēdēs. Briedis J., Dūmiņš I., Lasis U.u.c.; K. Tabaka red. Rīga:Zvaigzne 1999. 300. lpp.

1. Franco S. Electric circuits fundamentals. International edition. Saunders College Publishing 1995.-882 p.

2. Nahvi R., Sonderstand M. Student problems manual for electric circuits fundamentalsSaunders College Publishing, 1995-578p.

3. Dorf R.C. Introduction to electric circuits. 2nd edition. New York. John Wiley & Sons, Inc. 1993. 872 p.

Compulsory course in full-time and part-time studies of professional higher education bachelor study program "Applied Energy Engineering"