Course code ETeh4052

Credit points 3

Electrotechnical Materials

Total Hours in Course81

Number of hours for lectures24

Number of hours for laboratory classes8

Independent study hours49

Date of course confirmation05.01.2016

Responsible UnitInstitute of Engineering and Energetics

Course developer

author lect.

Imants Plūme

Mg. sc. ing.

Course abstract

The aim of the study course is to get acquainted with gaseous, liquid and solid electrotechnical materials, their properties, material extraction and pre-processing. Students gain knowledge about the characteristics of insulation materials, wiring materials, construction materials and products, their suitability for operation in environments with different conditions. In the laboratory work students acquire skills to determine the parameters of materials and their changes depending on the applied electric field, mechanical load, temperature and chemical environmental conditions.

Learning outcomes and their assessment

Knowledge - knows the principles of classification of electrotechnical materials, the main properties of gaseous, liquid and solid materials - Test 1, knows the properties of inorganic dielectric materials and dielectric polymers and the corresponding application - Test 2,knows the principles and main parameters of electrical insulation varnish, enamel, compound, layered plastics and other plastics production - Test 3;
Skills - is able to determine the main electrical, mechanical, physical and chemical properties of electrotechnical materials - laboratory works, is able to choose dielectric and conductive materials, semiconductors, high-resistance materials, contact materials, magnetic material for electrical equipment in accordance with the operating conditions - laboratory works, independent work 1;

Competence - choose the materials of electrical equipment, according to their operating conditions. Test with grade.

Course Content(Calendar)

Full time intramural studies:
1. Classification of electrotechnical materials, their physical and chemical properties – 2 h.
2. Gaseous dielectrics: properties, their permeation; applications – 2 h.
3. Mineral oils and synthetic electrical insulating fluids, properties and applications – 2 h.
Test 1. Electrotechnical materials, classification, properties of gaseous, liquid and solid materials – 1 h
4. Inorganic dielectric materials: mica, quartz, talc; glass and electroceramic materials: porcelain, special insulators – 2 h.
5. Organic dielectric materials: physical, chemical properties, application – 2 h.
6. Polymerization and polycondensation obtainable polymers, heat-resistant polymers, application – 2 h.
Test 2. Extraction, properties and applications of resins and polymers – 1 h.
7. Dielectric plastics: main components, use in electrical engineering; laminated plastics, compounds: extraction, properties, application – 2 h.
8. Electrical insulating varnishes and enamels: electrical properties, thermal resistance, – 2 h
Test 3. Extraction, properties and application of varnishes, enamels, compounds, layered plastics – 1 h.
9. Conductive materials: refined metals and alloys, characteristics – 1 h.
10. Magnetic and ferromagnetic materials: characteristics, products – 1 h.
11. Semiconductors, superconductors and optical fibers: properties, operating conditions – 1 h.
12. Solar energy converters, battery materials: properties, products and applications – 1 h.
13. Nanomaterials and other promising electrotechnical materials: properties, products and applications – 1 h.

Laboratory works:
1. Determination of specific resistance, its temperature coefficient for conductors - 1 h.
2. Research of contact materials, their transition resistance - 1 h.
3. Determination of acid number for liquid dielectric - 1 h.
4. Determination of dielectric loss angle tangent for liquid dielectric - 1 h.
5. Investigation of the coefficient of thermal expansion of materials and liquids - 1 h.
6. Determination of dielectric permeability for dielectric material - 1 h.
7. Determination of thermoelectric motor force for thermocouples - 1 h.
8. Determination of parameters of light-voltage converters - 1 h.
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

Requirements for awarding credit points

Must have performed and credited all the laboratory works, the independent work and passed all the tests.

Description of the organization and tasks of students’ independent work

1. Completion / formatting of laboratory works. Students are guided by the requirements defined in lectures and laboratory works.

2. Independent work. Distribution of an element (product) used in electrical engineering in nature, physical, chemical, electrical properties, extraction, application in electrical engineering, creation of a presentation. Volume at least 6 pages, submitted electronically.

Criteria for Evaluating Learning Outcomes

Test with a grade
Assessment takes place in a 10-point system, summing up the assessments of tests (max. 30%), independent work (max. 30%) and laboratory work (max. 40%), taking into account the level and quality of acquired knowledge.

Compulsory reading

1. Meļņikovs V. Elektrotehniskie materiāli. I daļa. Vadītāju, magnētiskie un konstrukcijas materiāli. Rīga: RVT 2006. 173 lpp.
2. Meļņikovs V. Elektrotehniskie materiāli. II daļa. Dielektriskie un pusvadītāju materiāli. Rīga: RVT 2006. 135 lpp.

3. Banerjee, G. K. (editor), Electrical and electronics engineering materials, PHI Learning Pvt. Ltd., 2014, p. 360.

Further reading

1. Elektrotehniskie materiāli: Mācību metodiskais līdzeklis. Sast. Plūme I. Jelgava: LLU, 2008. 59 lpp.
2. Transformatoru eļļu pārbaudes normas. LEK 118. Latvijas Elektrotehniskā komisija, 2014. 45 lpp.
3. Krizbergs J, Gutakovskis V. Kompozītmateriāli. mācību materiāli, Rīgas Tehniskā koledža, 2016, 94 lpp.

4. Ржевская С. П.. Электротехнические материалы. Диэлектрики : курс лекций, Белорусский национальный технический университет, Электрические станции". - Минск : БНТУ, 2009. - 141 с.

Periodicals and other sources

1. Žurnāls Enerģija un pasaule, Izd.: VAS LATENERGO un Latvijas Elektroenerģētiķu biedrība. ISSN: 1407-5911,
2. Journal "Materials Science Forum". ISSN: 0255-5476.

3., skatīts: 20.09.2020.


Compulsory course in the professional bachelor's program "Applied Energy Engineering"