9.4 A 3-phase, 16-pole, Alternator has a star-connected winding with 144 slotsand 10 conductors per slot. The flux per pole is 0.03 Wb sinusoidally distributedand the speed is 375 rpm. The winding is short chorded by 1 slot. Calculate theno-load terminal voltage.[Ans: 2617.9]

Answered: 9.4 A 3-phase, 16-pole, Alternator has…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter31: Three-phase Alternators

Section: Chapter Questions

Problem 1RQ: What conditions must be met before two alternators can be paralleled together?

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There are 160 slots in a 3-phase, 8-pole, 50 Hz., star connected alternator. There are 4 conductors in each slot and all the conductors in a phase are connected in series. Coil span is 150° electrical and the flux per pole is 0.08 Weber sinusoidally distributed. Calculate the emf induced per phase.
Find the rms value of the induced emf per phase of a 10 pole, three phase, 50 Hz alternator with 2 slots per pole per phase and 4 conductors per slot in two layers. The coil span is 150°. The flux per pole is 0.12 Wb (a) 994 (c) 1020 53. (b) 864 (d) 960
A 3-phase 4-pole alternator has a single layer full-pitch winding with 8 conductors per slot. The armature has a total of 36 slots. Determine the voltage between lines when the alternator is driven at 1800 rpm with a flux of 0.05 Wb per pole.
Calculate the speed and open-circuit line and phase voltages of a 4-pole, 3-phase, 50Hz, star connected alternator with 36 slots and 30 conductors per slot. The flux per pole is 0.0496 Wb and is sinusoidally distributed.
2.
A 3-phase 4-pole alternator has 48 stator slots carrying the 3-phase distributed winding. Each coil of the winding is short chorded by one slot pitch. The winding factor is given by
Q5: A 3-phase, 50 Hz, 8-pole alternator has a star-connected winding with 120 slots and 8 conductors per slot.The flux per pole is 0.05 Wb, sinusoidally distributed. Determine the phase and line voltages.
7. The voltage generated across one inductor of a 30 alternator is 6 volts. There are 120 slots and 4 turns in every coil. The coil pitch is short by 2 slots, number of poles is 10 and frequency is 60 Hz. The armature winding correction factor of the alternator is nearest to a. 0.925 b. 0.987 c. 0.967 d. 0.957
9.6 A 3-phase. 16-pole Alternator has 192 stator slots with 8 conductors per slot. The conductors of each phase are connected in series. The coil-span is 150 electrical degrees. If the flux per pole is 0.064 Wb sinusoidally distributed, find the phase and line values of no-load voltage, if the stator is star-connected and the required frequency is 50 Hz.
A three-phase, 4-pole alternator runs at 1,800 RPM. Each phase covers two slots under each pole. The full pitch armature coils have 4 turns per coil and there are 2 coil sides per slot. The flux/pole is 6,000 kilolines distributed sinusoidally. (a) What is the distribution factor? (b) Determine the emf per phase. Ans. 0.966; 494V
9.6 A 3-phase. 16-pole Alternator has 192 stator slots with 8 conductors per slot. The conductors of each phase are connected in series. The coil-span is 150 electrical degrees. If the flux per pole is 0.064 Wb sinusoidally distributed, find the phase and line values of no-load voltage, if the stator is star-connected and the required frequency is 50 Hz. [Ans : Kp = 0.966: Ka = 0.958: E = 3367: E₁ = 5830] 9.7 A 4-pole, 50 Hz, 3-phase, star-connected Alternator has 60 slots with 2 conductors per slot. The winding is short-chorded by 2 slots. If the sinusoidally distributed flux per pole is 0.062 Wb, calculate the no-load terminal voltage. [Ans : Kp = 0.973 : Ka = 0.956: E=257.54 E₁ = 446.07] 9.8 An eight pole, 3-phase, 60° phase-spread, double layer winding has 72 coils in 72 slots. The coils are short-chorded by 2 slots. Calculate the winding factors for the fundamental and the third harmonic. : [Ans Kp1 = 0.9397: Kd₁ = 0.9597: Kp3 = 0.5: Kd3 = 0.667] 9.9 Calculate the rms value of the…

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9.4 A 3-phase, 16-pole, Alternator has a star-connected winding with 144 slots and 10 conductors per slot. The flux per pole is 0.03 Wb sinusoidally distributed and the speed is 375 rpm. The winding is short chorded by 1 slot. Calculate the no-load terminal voltage. [Ans: 2617.9]