Understanding the Design and Function of AC Generators
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | alternator
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| show | Dc uses a comutator
AC uses slip rings and brushes
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| show | Armature Field
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| 4. Slip rings, unlike the segmented commutator, are contructed as a ___ ring, with each end of the armature loop connected to a seperate ___ | show 🗑
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| show | 120 degrees
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| show | brushes and slip rings.. page 234
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| 7.What is the advantae of using a rotating field and a stationary armature on commercial generators | show 🗑
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| 8. The ___ is the rotating member of a generator or motor. | show 🗑
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| show | stator
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| 10. Two tpes of rotating field construction are the ___ rotor and the ___ rotor | show 🗑
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| show | salient poles
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| 12. The ___ rotor uses a smooth, longer, and narrower construction to minimize wind resistance and centrifugal forces | show 🗑
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| show | stationary, rotating
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| 14. A rotating exciter mounted on the same shaft as the main generator is usually called a ___exciter | show 🗑
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| show | Air
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| show | fan
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| 17. Large-capacity generators are often enclosed in a ___ atmosphere for cooling purposes | show 🗑
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| show | hydrogen
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| show | number of poles, speed of rotor
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| show | f = p * s/120
p= # of poles
z= speed RPM
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| 21. To generate 50 Hz with an 8-pole generator, the speed of rotation must be ___RPM | show 🗑
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| 22. How many poles are required for a generator to hae a frequecy of 60 Hz at 1,200 RPM? | show 🗑
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| show | 50 Hz
5- = (4 * 1,500) / 120
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| 24. What three factors determine the output voltage of an alternator? | show 🗑
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| show | increasing or decreasing strength of magnetic field.
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| 26. What three conditions must be met when connection two 3-phase alternators in parallel? | show 🗑
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| 27. The most common method of detecting when the direction of the magnetic field of one alternator is matched with the phase rotation of a paralleled alternator is with the use of ___ | show 🗑
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| show | all the lights are out
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| show | synchroscope
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Created by:
JoshHampton