For the alternator, Find Kd, Kp and the numberof turns per phase, star connected, Full Pitch winding,3-Phase, 50 Hz, 10 poles with So slots,line voltage 11000 volts, Ops 0,16 webers.Q2/ Explaine about armature synchronous reactance Xs.

Step 1: Given slots=90, poles=10 Q2: Synchronous reactance (Xs) in a 3-phase generator is a…

Answered: For the alternator, Find Kd, Kp and the…

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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Alternator voltage regulation is ............... % *
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A 3-phase, 60 Hz, 6 pole alternator has an air gap flux which is sinusoidally distributed. The stator has 5 slots per pole per phase and each slots contains 4 conductors arranged in two layers. The coil pitch is 12 slots, with normal excitation and rated speed, the voltage induced per conductor is 25 V. The open circuited emf of this Y-connected machine between lines is?
A 2 pole wave wound dc generator has 44 slots, each slot having 20 conductors. The flux/pole is 0.018 weber. At what speed the armature be rotated to get an induced emf of 220 V. What will be the induced emf developed if the armature winding is lap connected and runs at the same speed. Speed Generated Emf when lap connected
A 35-ohm diverter resistance is shunted across the series field of a DC series generator is supplying a current of 6 A to a series lighting system through a feeder of total resistance, 1.25 ohm. The terminal voltage is 2,300 V. The armature and series field resistances are respectively 18 and 15 ohms respectively. Determine the power developed in the armature of the generator?
Two 30 AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductors per slot in big generator in K times that of the smaller one. The value of K to get equal no-load voltage at same frequency is (a)8 (b) 8 1 (d) 7 (c) 4
A short shunt compound generator delivers 150A at a terminal voltage is 230V. The shunt field current is 2.5A. The resistances of the armature, series field and diverter are 0.032-ohm, 0.015 ohm and 0.03 ohm, respectively. Calculate the electrical efficiency of the generator at this load.
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A 2MVA, 2.3kV three – phase Y – connected alternator operates at rated kVA at a power factor of 80%. The dc armature winding resistance between terminals is 0.08 ohm. The field takes 70 A at 125 V from an exciter equipment. Friction and windage loss is 20kW, iron losses 36kW and stray load losses are 2.0 kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance is 120% of the DC resistance. a. 94.0 % b. 92.1 % c. 93.2 % d. 89.5 %
DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: AC MACHINES Answer the following questions (A, B and C) depending on the topic. 1. ALTERNATORS A. Why is it necessary to maintain the speed of an alternator at all times and how do they control the speed of an alternator when in operation? B. Distinguish between half-coiled and full-coiled armature windings in alternators. C. Why are fractional pitch windings generally used in alternators?
Can you please answer Problem 49 to 51.
Consider the following statements regarding the design of the distributed armature winding in a three-phasealternator:1. It reduces the phase belt harmonics.2. It increases utilization of armature iron and copper.3. It increases rigidity and mechanical strength of the winding.4. It reduces copper in the overhand of the winding. Which of the statements are correct? a. 1,3 and 4b. 2,3 and 4c. 1,2 and 3d. 1,2,3 and 4

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For the alternator, Find Kd, Kp and the number of turns per phase, star connected, Full Pitch winding, 3-Phase, 50 Hz, 10 poles with So slots, line voltage 11000 volts, Ops 0,16 webers. Q2/ Explaine about armature synchronous reactance Xs.