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A resultant air-gap flux of a 16-pole, 3-phase alternator is 0.16 wb/pole and is distributed sinusoidally over the pole. The stator has two slots/pole/phase and 4 conductors per slot are accommodated in two layers. The coil span is 150 electrical degrees. Calculate the emf generated in each phase when the machine runs at 375 rpm

A resultant air-gap flux of a 16-pole, 3-phase alternator is 0.16 wb/pole and is distributed sinusoidally over the pole. The stator has two slots/pole/phase and 4 conductors per slot are accommodated in two layers. The coil span is 150 electrical degrees. Calculate the emf generated in each phase when the machine runs at 375 rpm

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A resultant air-gap flux of a 16-pole, 3-phase alternator is 0.16 wb/pole and is distributed sinusoidally over the pole. The stator has two slots/pole/phase and 4 conductors per slot are accommodated in two layers. The coil span is 150 electrical degrees. Calculate the emf generated in each phase when the machine runs at 375 rpm
ESTION ONE A. A 3-phase synchronous generator has 4 poles and runs at 1500 r.p.m. The total number of armature conductors is 720 accommodated in 72 slots. If the flux per pole is 0.035Wb, determine i. The frequency of the emf ii. The magnitude of emf for a star connection with coils short-chorded by two slot pitches. 3. Calculate the number of stator conductors per slot for a 3-phase, 50Hz alternator if the winding is star-connected and has to give a line voltage of 13KV when the machine is on open-circuit. The flux per pole is 0.15Wb. Assume full-pitch coils and the stator to have 3 slots/pole/phase. The speed is 300 r.p.m C. The resultant air-gap flux of a 16-pole, 3-phase alternator is 0.16Wb/pole and is distributed sinusoidally over the pole. The stator has 2 slots/pole/phase and 4 conductors per slot are accommodated in two layers. The coil span is 150 electrical degrees. Calculate the emf generated in each phase when the machine runs at 375 r.p.m STION TWO A 3-phase, 11KV, star-connected alternator has armature resistance of 12/phase and a synchronous reactance of 2002/phase. Find the percentage change in terminal voltage for a load of 1500kW at a p.f. of ¡. 0.8 lagging ii. Unity 0.8 leading iii. A single phase alternator having a synchronous reactance of 5.592 and armature of operated in the
Transcribed Image Text:ESTION ONE A. A 3-phase synchronous generator has 4 poles and runs at 1500 r.p.m. The total number of armature conductors is 720 accommodated in 72 slots. If the flux per pole is 0.035Wb, determine i. The frequency of the emf ii. The magnitude of emf for a star connection with coils short-chorded by two slot pitches. 3. Calculate the number of stator conductors per slot for a 3-phase, 50Hz alternator if the winding is star-connected and has to give a line voltage of 13KV when the machine is on open-circuit. The flux per pole is 0.15Wb. Assume full-pitch coils and the stator to have 3 slots/pole/phase. The speed is 300 r.p.m C. The resultant air-gap flux of a 16-pole, 3-phase alternator is 0.16Wb/pole and is distributed sinusoidally over the pole. The stator has 2 slots/pole/phase and 4 conductors per slot are accommodated in two layers. The coil span is 150 electrical degrees. Calculate the emf generated in each phase when the machine runs at 375 r.p.m STION TWO A 3-phase, 11KV, star-connected alternator has armature resistance of 12/phase and a synchronous reactance of 2002/phase. Find the percentage change in terminal voltage for a load of 1500kW at a p.f. of ¡. 0.8 lagging ii. Unity 0.8 leading iii. A single phase alternator having a synchronous reactance of 5.592 and armature of operated in the
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