1. A 3-4, Synchronous generator generates an open circuit terminal voltage of 6298 V when the exciting current is 50A. When ac terminals are short-circuited, the three-line currents are found to be 800 A. a) Calculate the synchronous reactance per phase b) Calculate the terminal voltage if three 12-ohm resistors are connected in delta across the terminals of stator winding. c) Write any assumptions made in the above calculations and also suggest suitable methods to raise the voltage at load terminals. 2. Explain the similarities and differences between Synchronous Motor and three phase induction motu

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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.