A 3-phase, 400 V synchronous motor having a power consumption of 50 kW is connected in parallel with an induction motor which takes 200 kW at a power factor of 0-8 lagging. (i) Calculate the current drawn from the mains when the power factor of the synchronous motor is unitv. (ii) At what power factor should the synchronous motor operate so that the current drawn from the mains is minimum?
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, 400 V synchronous motor having a power consumption of 50 kW is connected in parallel with an induction motor which takes 200 kW at a power factor of 0-8 lagging. (i) Calculate the current drawn from the mains when the power factor of the synchronous motor is unitv. (ii) At what power factor should the synchronous motor operate so that the current drawn from the mains is minimum?
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