What three factors determine the output voltage of an alternator?
#Slipstack method generator
A generator has four poles and a speed of 1,500 RPM. How many poles are required for a generator to hae a frequecy of 60 Hz at 1,200 RPM?Ģ3. To generate 50 Hz with an 8-pole generator, the speed of rotation must be _RPMĢ2. What is the mathematical formula for determining the frequency of an alternator?Ģ1. What are the factors that determine the frequency of an alternator?Ģ0. Which dissipates heat faster, hydrogen or air?ġ9. Large-capacity generators are often enclosed in a _ atmosphere for cooling purposesġ8. Air cooled alternator usually have a _ attached to one end of the rotor to help circulate air.ġ7. Alternators wiht small kVa ratings are usually _ cooledġ6. A rotating exciter mounted on the same shaft as the main generator is usually called a _exciterġ5. Exciters are made in a variety of ways including _ and _ġ4. The _ rotor uses a smooth, longer, and narrower construction to minimize wind resistance and centrifugal forcesġ3. Pole faces that jut out and are ery pronounced are called _ poles.ġ2. Two tpes of rotating field construction are the _ rotor and the _ rotorġ1. When the armature is held stationary in a generator it is called the _ġ0. The _ is the rotating member of a generator or motor.ĩ. What limits the amount of power that can be generated with the revolving armature type of generatorħ.What is the advantae of using a rotating field and a stationary armature on commercial generatorsĭesign permits higher kva ratings because he output of circuit is connected to the stator.
In a 3-phase generator, the three sets of windings are placed _ apart.Ħ. Slip rings, unlike the segmented commutator, are contructed as a _ ring, with each end of the armature loop connected to a seperate _ĥ. These are the revolving _ type and the revolving _ typeĤ.
What is the primary difference between a simple DC generator and a simple AC generatorģ. Another name for an AC generator is the _Ģ. AC Theory ch 31 Understanding the Design and Function of AC Generators Questionġ.
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