three-phase, 400V (line voltage), 60 Hz, 6-pole, star-connected synchronous generator has a synchronous reactor of 1.2 ohms per phase. the armature current of the generator at full load is 64 A at a power factor of 0.95 back. this generator has 2 kW rotation loss and 1.6 kW core loss at full load. the excitation current is set to be 400V ( line voltage) when the generator is idle. when the generator is loaded with 0.95 reverse power factor current at full load a) find the Rotary field speed of the generator b) find the mechanical speed of the generator c) What is the output voltage d) find the yield e) find voltage regulation
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.
three-phase, 400V (line voltage), 60 Hz, 6-pole, star-connected synchronous generator has a synchronous reactor of 1.2 ohms per phase. the armature current of the generator at full load is 64 A at a power factor of 0.95 back. this generator has 2 kW rotation loss and 1.6 kW core loss at full load. the excitation current is set to be 400V ( line voltage) when the generator is idle. when the generator is loaded with 0.95 reverse power factor current at full load
a) find the Rotary field speed of the generator
b) find the
c) What is the output voltage
d) find the yield
e) find voltage regulation
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