he field current of a synchronous generator is adjusted to give an air-gap flux of 0.01 reber per pole. The flux is sinusoidally distributed along the air gap. The armature rinding is Y-connected. There are 5 slots/phase/pole and the coil pitch is 12/15. The requency is 60 hertz at 1,200 RPM. (a) Calculate the emf/turn. (b) If there are 10 turns/ pil and two coil sides per slot, calculate the emf per phase. (c) Calculate the emfbetween erminals. Ans. 2.53V; 728V; 1,260V.
he field current of a synchronous generator is adjusted to give an air-gap flux of 0.01 reber per pole. The flux is sinusoidally distributed along the air gap. The armature rinding is Y-connected. There are 5 slots/phase/pole and the coil pitch is 12/15. The requency is 60 hertz at 1,200 RPM. (a) Calculate the emf/turn. (b) If there are 10 turns/ pil and two coil sides per slot, calculate the emf per phase. (c) Calculate the emfbetween erminals. Ans. 2.53V; 728V; 1,260V.
Chapter51: Electric And Electronic Braking
Section: Chapter Questions
Problem 2SQ: Differentiate between the AC and DC magnetic fields applied to an induction motor stator.
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Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
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