1. To write down the system of equations based on Kirchhoff's laws for the initial scheme of branch currents 12, 13 etc. and to determine the electromotive force e1. Prepared in this way there is no need to solve the system of equations. 2. Calculate the required branch currents 12, 13, etc. according to the original scheme. and electromotive force e1 by the contour flow method. Check with the help of numerical values of branch currents and electromotive force found the correctness of the equations created in the previous point. 3. Find the distribution of potentials in the original circuit, with the potential of the grounded node read as zero ( 0 = 0 V). At the same time, redraw the original diagram and indicate it with arrows the actual (positive) directions of the branch currents and note the branch currents and numerical values of electromotive forces and potentials of nodes 1, 2, 3 and 4. 4. Prepare a capacity balance for the initial scheme. In order to calculate all consumers, electromotive force and current source capacities. 5. Calculate the readings of the voltmeters UV1 and U V2. 6. Find the current 12 of the second branch (elements of the second branch have index 2) of the equivalent generator method. 7. Calculate the input conductivity g 22 of the second branch and the second and third branches (where the elements have index 3) mutual conductivity g 23. Notes and recommendations: 1. The number of the scheme (variant) is chosen according to the list prepared in the study group, which is presented to the lecturer. 2. The numerical values of the parameters of the circuit elements are given in the table. Their choice determined by the supervising lecturer. 3. By solving the problem using the equivalent generator method (point 6), it is determined the electromotive force of the voltage generator e g in the condition of the second branch idling (the second branch is discontinued). At the same time, the distribution of currents in the remaining branches of the idle circuit should be find by the nodal voltage method. The input resistance R g of the equivalent generator is determined by the passive idle scheme with respect to the terminals of the second branch disconnected by conversion/nELEKTRIAHELADI ATE 3150. Kodutöö nr. 1. Alalisvoolu hargahel. Ülesanne: 1. Kirjutada välja võrrandsüsteem Kirchhoffi seaduste alusel algskeemi kohta otsitavate haruvoolude 12, 13 jne. ning elektromotoorjōu e, määramiseks. Sel viisil koostatud võrrandsüsteemi pole vaja lahendada. 2. Arvutada algskeemi kohaselt otsitavad haruvoolud 12, 13 jne. ja elektromotoorjõud e₁ kontuurvoolumeetodil. Leitud haruvoolude ja elektromotoorjōu arwäärtuste abil kontrollida eelmises punktis koostatud võrrandite õigsust. 3. Leida potentsiaalide jagunemine algskeemis, kusjuures maandatud sõlme potentsiaal lugeda nulliks (= 0V). Sealjuures joonistada uuesti algskeem ja näidata sellel nooltega haruvoolude tegelikud (positiivsed) suunad ning märkida haruvoolude ja elektromotoorjõudude numbrilised väärtused ja sõlmede 1, 2, 3 ja 4 potentsiaalid. 4. Koostada võimsuste bilanss_algskeemi kohta. Selleks arvutada kõikide tarbijate, elektromotoorjõudude ja vooluallika võimsused. 5. Arvutada voltmeetrite näidud U v₁ ja U v2. 6. Leida teise haru vool I 2 (teise haru elementidel on indeks 2) ekvivalentse generaatori meetodil. 7. Arvutada teise haru sisendjuhtivus g 22 ning teise ja kolmanda haru (kus elementidel on indeks 3) vastastikune juhtivus g 23. Märkusi ja soovitusi: 1. Skeemi (variandi) number valitakse vastavalt õpperühmas koostatud nimekirjale, mis esitatakse õppejõule. 2. Skeemi elementide parameetrite numbrilised väärtused on toodud tabelis. Nende valiku määrab juhendav õppejõud. 3. Ekvivalentse generaatori meetodil (punkt 6) ülesannet lahendades määratakse pingegeneraatori elektromotoorjõud eg teise haru tühijooksu olukorras (teine haru on katkestatud). Sealjuures voolude jagunemine tühijooksuskeemi allesjäänud harudes tuleks leida sõlmepingemeetodil. Ekvivalentse generaatori sisendtakistus Rg määratakse passiivse tühijooksuskeemi teisendamise teel katkestatud teise haru klemmide suhtes. Algandmed variant 3: r1=50 r2=50 г3=60 г4=50 гs=20 г6-20 ry=20 r8=20 i=2A i₁=4A e2=50 V e3=40 V e 4-30 V e 5 = 20 V e 6= 10 V Õppejõud: Aleksander Kilk 15. 2023/2024. Õppeaasta 7777 es ? e₁ De ⑦es

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1. To write down the system of equations based on Kirchhoff's laws for the initial scheme of branch currents 12, 13 etc. and to determine the electromotive force e1. Prepared in this way there is no need to solve the system of equations. 2. Calculate the required branch currents 12, 13, etc. according to the original s