7. A 3-phase, Y-connected, 2-pole alternator runs at 3,600 r.p.m. If there are 500 condu series on the armature winding and the sinusoidal flux per pole is 0.1 Wb, calculate t
7. A 3-phase, Y-connected, 2-pole alternator runs at 3,600 r.p.m. If there are 500 condu series on the armature winding and the sinusoidal flux per pole is 0.1 Wb, calculate t
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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Question
![7. A 3-phase, Y-connected, 2-pole alternator runs at 3,600 r.p.m. If there are 500 conductors per phase in
series on the armature winding and the sinusoidal flux per pole is 0.1 Wb, calculate the magnitude and
frequency of the generated voltage from first principles.
8. One phase of a 3-phase alternator consists of twelve coils in series. Each coil has an r.m.s. voltage of
10 V induced in it and the coils are arranged in slots so that there is a successive phase displacement of
10 electrical degrees between the e.m.f. in each coil and the next. Find graphically or by calculation, the
r.m.s. value of the total phase voltage developed by the winding. If the alternator has six pole and is
driven at 100 r.p.m., calculate the frequency of the e.m.f. generated.
[60 Hz; 11.5 kV]
[ 108 V; 50 Hz]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4d9bec27-aa3f-4bfb-b424-15ff3cff5fa6%2F1a836b34-ba75-44d5-9199-ada918b44554%2Fp2rcvea_processed.png&w=3840&q=75)
Transcribed Image Text:7. A 3-phase, Y-connected, 2-pole alternator runs at 3,600 r.p.m. If there are 500 conductors per phase in
series on the armature winding and the sinusoidal flux per pole is 0.1 Wb, calculate the magnitude and
frequency of the generated voltage from first principles.
8. One phase of a 3-phase alternator consists of twelve coils in series. Each coil has an r.m.s. voltage of
10 V induced in it and the coils are arranged in slots so that there is a successive phase displacement of
10 electrical degrees between the e.m.f. in each coil and the next. Find graphically or by calculation, the
r.m.s. value of the total phase voltage developed by the winding. If the alternator has six pole and is
driven at 100 r.p.m., calculate the frequency of the e.m.f. generated.
[60 Hz; 11.5 kV]
[ 108 V; 50 Hz]
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