1. A 2014-KVA, 3 phace, 8 pole alternator runs at 750 rpm in parallel with other machines on 6,006 V bus-bars. Find the synchronizing power on full-load 0.8 PF lagging per mechanical degree of displacement and the corresponding synchronizing torque. The synchronous reactance is 14-2 per phase.

1. A 2014-KVA, 3 phace, 8 pole alternator runs at 750 rpm in parallel with other machines on 6,006 V bus-bars. Find the synchronizing power on full-load 0.8 PF lagging per mechanical degree of displacement and the corresponding synchronizing torque. The synchronous reactance is 14-2 per phase.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.3MCQ: The amplitude of the sinusoidal symmetrical ac component of the three-phase short-circuit current of...

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Concept explainers

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.

Question

4 decimal places

1. A 2014-KVA, 3 phace, 8 pole
alternator runs at 750 rpm in
machines on
parallel with other
6,006 V bus-bars. Find the
synchronizing power on full-load
0.8 PF lagging per mechanical
degree of displacement and the
corresponding synchronizing torque.
The synchronous reactance is 14_2
per phase.

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