' A three phase, star connected, round rotor synchronous generator is rated 250 MW, 0.85 lagging power factor, 10.8 kV 50 Hz, and 1600 rpm. Each winding has an armature resistance of 1.5 mOHM and a synchronous reactance of 0.5 OHM 1)Determine the induced voltage for the condition of rated load and 0.85 power factor lagging. 2) Draw the phasor diagram with calculated values. 3) Determine the values of theta, gamma, delta, and torque angle

explain the phasor diagram of slip phase induction motor

In alternator, the diameter of salient pole rotor is...

How to calculate the pitch factor of a  8 pole alternator with an armature wound coils having 18 / 24  fractioanl pitch. Can you please show the solution in details.

4 The field current of a synchronous generator is adjusted to give an air-gap flux of 0.01 weber per pole. The flux is sinusoidally distributed along the air gap. The armature winding is Y-connected. There are 5 slots/phase/pole and the coil pitch is 12/15. The frequency is 60 hertz at 1,200 RPM. (a) Calculate the emf/turn. (b) If there are 10 turns/ coil and two coil sides per slot, calculate the emf per phase. (c) Calculate the emfbetween terminals. Ans. 2.53V; 728V; 1,260V.

What will be the front and back pitches of the 6-pole dc generator with a simplex 2-layer wave winding having 36 conductors and the winding is retrogressive?

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current and on-time? 2. A 60V chopper drives a resistive load of 12fL The chopper frequency is set to 1 kHz. Calculate the values of average and rms load currents and load power for a turn-on time of (a) 0.2ms, (b) 0.6ms.

2) the armature windings of a 12-pole DC machine are composed of 72 coils with 10 windings, and the windings are 5the layered wave is yellowish. The Rotor speed is 1000 rpm and the flux value per pole is 25mWb.Resistance of Armature windings, commutation windings and compensation windings is 70mΩ, 10mΩ and5mω. (a) the number of current paths in the machine, (b) the total number of conductors in Armature windings, (c) armature coefficient (constant)

Determine the synchronous impedance and reactance of an alternator in which a given field current produces an armature current of 200A on short circuit and a generated emf of 50V on open circuit. The armature resistance is 0.1 ohms