The production of Rotating magnetic field in 3 phase supply is very interesting. When a 3-phase winding is energized from … Read moreProduction of Rotating Magnetic Field

46. The windings for an alternator are I. 36 slots, four poles, span 1 to 8 II. 72 slots, six … Read moreObjective Questions on Alternators | Part 4

Part 1Part 2Part 3Part 4Part 5 31. In order to reduce the harmonics in the emf generated in an alternator(A) … Read moreObjective Questions on Alternators | Part 3

31. The type of starting relay used on single phase hermetic motor is (A) hot wire relay (B) timing relay … Read moreObjective Questions on Single Phase Motors | Part 3

  Part 1Part 2Part 3Part 4Part 5 16. Single phase motors are commercially manufactured up to   A   1 … Read moreObjective Questions on Single Phase Motors | Part 2

Speed control of dc motor is achieved using different methods. There are three types of dc motors. For each of … Read moreSpeed Control of DC Motor (Shunt, Series and Compound)

Although a far greater percentage of electric motors in service are ac motors, the dc motor is of considerable industrial importance. … Read moreSpeed Control Of DC Series Motors

The different methods of speed control in DC shunt motors are explained below, Flux Control Method Armature Control Method Voltage … Read moreSpeed Control of DC Shunt Motors

A three phase induction motor has two main parts stator  rotor. The rotor is separated from the stator by a … Read moreThree Phase Induction Motors – Construction