A 3-phase 440V 50hz wye connected SM takes 7.46 kW from the three-phase mains. The resistance per phase of the armature winding is 0.5Ω. The motor operates at a pf of 0.75 lag. Iron and mechanical losses amount to 500W. The excitation loss is 650W. Assume the source for excitation to be a separate one, a. calculate power supplied to the motor b. the efficiency of the motor
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.
A 3-phase 440V 50hz wye connected SM takes 7.46 kW from the three-phase mains. The resistance per phase of the armature winding is 0.5Ω. The motor operates at a pf of 0.75 lag. Iron and
a. calculate power supplied to the motor
b. the efficiency of the motor
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