Ankerwikkeletorie N2 — Document

December 2023 — N2 — Ankerwikkeletorie

N2 2023 Nated Engineering

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Q1— Section header —

1.1Noem DRIE metodes om kommutasie te reduseer. (3\

1.2Teken 'n netjiese diagram van 'n vierpool retrogressiewe wikkeling met 'n 1 tot 12 kommutatorsteek. (5\

1.3Noem VIER tipes selfopwek GS masjiene. (4\

1.4Teken die laskenmerkkromme van 'n omtakgenerator. (4\

1.5'n Sespool anker met golfwikkeling beskik oor 72 gleuwe en 143 kommutatorsegmente. Bereken die:

1.5.1Spoelspan

1.5.220

Q2— Section header —

2.1Teken 'n netjiese diagram van 'n omtakpoolgenerator met hulppole. (6\

2.2Noem DRIE metodes wat vir sluiting van gleuwe gebruik word. (3\

2.3'n Agtpool anker met luswikkeling roteer teen 200 r/min en moet 450 V lewer. Die vloed per pool is 0,0444 Wb. Die anker beskik oor 76 gleuwe en trek 'n stroom van 110 A. Bereken:

2.3.1Die aantal geleiers per gleuf (4\

2.3.2Die wringdraai wat deur die wikkelings ontwikkel word (3\

2.4Die ankerstroom van 'n GS omtakmasjien is 10 A. Die motor werk teen 'n Bereken die EMK wanneer die motor in elk van die volgende konfigurasies gekoppel is:

2.4.1Generator

2.4.220

Q3— Section header —

3.1Gee VYF vereistes waaraan 'n anker na 'n herwikkeling moet voldoen. (5\

3.2Noem VIER toetse wat na herwikkeling aan 'n anker gedoen kan word. (4\

3.3Noem DRIE elektriese gebreke wat sal verhoed dat 'n GS masjien aansluit. (3\

3.4Toon, deur middel van 'n diagram, hoe 'n spanningsvaltoets uitgevoer moet word. (5\

3.5Teken 'n netjiese diagram van 'n anker met drie byskrifte. (3\ [20]20

Q4— Section header —

4.1Bereken:

4.1.1Die totale impedansie van die kring (6\

4.1.2Die stroom wat in die kring vloei (2\

4.1.3Die spanningsval oor die induktor (2\

4.1.4Die spanningsval oor die kapasitor (2\

4.1.5Die fasehoek tussen die spanning en die stroom (2\

4.2Noem TWEE tipes WS motors. (2\

4.3Wat is die doel van die sentrifugale skakelaar in 'n splitfasemotor? (2\

4.4Gee TWEE metodes wat gebruik kan word om die rotasie van 'n GS motor om te keer. (2\ [20] 220 V/50 Hz20

Q5— Section header —

5.1Noem VIER tipes konneksies van driefasige transformators. (4\

5.2Teken 'n basiese diagram van 'n manteltipe transformator. (4\

5.3Noem TWEE tipes ysterverliese wat in 'n transformator voorkom. (2\

5.4Hoe kan die rotasierigting van 'n driefasige sleepringmotor omgekeer word? (2\

5.5

5.5.1

5.5.2

5.5.3Aanslag van die transformator in VA

5.5.420

Mark Allocation

Total100 marks

Sections20 + 20 + 20 + 20 + 20 = 100 marks

Paper information

TitleDocument

SubjectAnkerwikkeletorie

LevelN2

Document typeQuestion paper

Year2023

MonthDecember

Pages8

Downloads3

Examination context

Decade2020s

Years ago3y

SeasonSummer (SH)

Start dayFriday

Exam periodDecember 2023

Days since exam1,046

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