3.17. A 200-turn coil is rotating at a speed of 3600 rpm in a 4-pole generator. Theflux per pole is 2 mWb. Determine (a) the frequency of the induced emf,(b) the maximum value of the induced emf, (c) the rms value of the inducedemf in an ac generator, and (d) the average value of the induced emf in adc generator.

The given question is solved in step by step process.Explanation:

Answered: 3.17. A 200-turn coil is rotating at a…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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?
A lap connected 6 pole DC generator has an armature conductors of 500 and is driven at 600 rpm. If the flux per pole is 15 mWb, then the generated e.m.f is,؟ 250 V 225 V 75 V 100 V
2. A 220-V long-shunt compound d.c. generator is supplying 100 A to a load. The resistances of the shunt field, the series field, and the armature are 50 ohms, 0.025 ohm, and 0.05 ohm respectively. Find the following:
A three-phase synchronous generator is rotating at 1000 RPM synchronous speed. The output power of this generator is 8.5 KW and its efficiency is 88%. If the copper losses are neglected. Calculate the induced torque by this generator. Select one: O a. Tind = 73.04 N.m. O b. tind = 8,48 N.m. O c. Tind = 81.1 N.m. O d. None O e. tind = 90.16 N.m. Clear my choice
Flux is exactly proportional to L2 times field current in a d.c generator. The generator operates at a speed of 200 revolutions per minute and has a flux of 62 mWb.f per pole. The generator is lap wound with 1500 conductors in series; determine the e.m.f. produced. If the winding is wave wound, calculate the change in excitation current required to get the same voltage as previously stated. The machine has six poles.
4. Draw a circuit model of a separately excited DC Generator.
Please see attached picture
Write down the Voltage equation of a Separately excited DC Generator
Question No.4 A dc generator has an armature emf of 100 V when useful flux/pole is 20 mWb, and a speed of 800 rpm. The generated emf at a speed of 1000 rpm and same flux is
An 8- pole dc generator has 500 armature conducters and a useful flux of 0.05 Wb. A. What will be the emf generated, if it is lap- connected and runs at 1200 rpm? B. What must be the speed at which it is to be driven to produce the same emf if it is wave wound.
Problem #1: A 6-pole, 3-phase, Y-connected, 60-Hz alternator has 12 slots per pole and 4 conductors per slot. The winding is 5/6 pitch. There are 0.025 Wb entering the armature from each north pole, and this flux is sinusoidally distributed along the air gap. The armature coils are all connected in series. Determine (a) pitch factor (b) distribution factor (c) induced emf per phase
Dc machine.............

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