rated load, a shunt motor draws an armature current of 50A from a 230V dc mains while running at 1000 rpm. At no load, the armature current drops to 5A. If the effect of armature reaction has weaken the flux by 2% from no load to full load, determine speed of the motor at no-load. Assume the armature resistance to be 0.15 ohm.
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.
At rated load, a shunt motor draws an armature current of 50A from a 230V dc mains while
running at 1000 rpm. At no load, the armature current drops to 5A. If the effect of armature
reaction has weaken the flux by 2% from no load to full load, determine speed of the motor at
no-load. Assume the armature resistance to be 0.15 ohm.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
