Insulation Resistance or IR Test is carried out by maintenance engineers to ensure the healthiness of the overall insulation system of electrical equipment. It reflects the presence or absence of …
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In a separately excited dc generator, the field coils are energized from an independent source. The disadvantage of a separately excited DC generator is the same that we require an external …
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Please go through the construction of dc generator before reading this article about different types of dc generator. A DC generator requires MMF to establish flux in its magnetic circuit. …
Continue ReadingTypes of DC Generator – Series, Shunt and Compound
Steam power stations convert the heat energy of coal combustion into electrical energy. A steam power station basically works on the Rankine cycle. Steam is produced in the boiler by utilizing …
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The production of Rotating magnetic field in 3 phase supply is very interesting. When a 3-phase winding is energized from a 3-phase supply, a rotating magnetic field is produced. This …
46. The windings for an alternator are I. 36 slots, four poles, span 1 to 8 II. 72 slots, six poles, span 1 to 10 III. 96 slots, six poles, …
Part 1Part 2Part 3Part 4Part 5 31. In order to reduce the harmonics in the emf generated in an alternator(A) slots are skewed(B) salient pole tips are chamfered(C) winding is …
Speed control of dc motor is achieved using different methods. There are three types of dc motors. For each of them, there are different methods of speed control. Each of …
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Although a far greater percentage of electric motors in service are ac motors, the dc motor is of considerable industrial importance. The principal advantage of a dc motor is that its speed …