The 4-pole direct current electric machine works as a generator. In this direct current machine, which also has auxiliary poles, the direction of the excitation flux is from bottom to top at the remaining pole located at the top of the armature from the main poles on the d axis. As the current direction is ๏ in armature conductors corresponding to the same pole; a. Find the direction of flux at the main poles. b. Find the current direction at the main poles c. Find the direction of flux at the auxiliary poles.
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.
The 4-pole direct current electric machine works as a generator. In this direct current machine, which also has auxiliary poles, the direction of the excitation flux is from bottom to top at the remaining pole located at the top of the armature from the main poles on the d axis. As the current direction is ๏ in armature conductors corresponding to the same pole;
a. Find the direction of flux at the main poles.
b. Find the current direction at the main poles
c. Find the direction of flux at the auxiliary poles.
d. Find the current direction at the auxiliary poles.
e.Show the direction of rotation by drawing a figure.
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