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Page Title:
Electrical systems personnel shall have a working level knowledge of direct current (DC) generators. |
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|  DOE-STD-1170-2003
h.
Describe how the following methods produce a voltage:
Electro-chemistry
Static electricity
Magnetic induction
Piezo-electric effect
Thermo-electricity
Photoelectric effect
Thermonic emission
i.
Using appropriate data, calculate the total resistance for a circuit containing
combinations of parallel and series resistance.
j.
Using appropriate data for a circuit, calculate the reactance of that circuit.
2.
Electrical systems personnel shall have a working level knowledge of direct
current (DC) generators.
Supporting Knowledge and/or Skills
a.
Describe the relationship between shaft speed, field flux and generated voltage.
b.
Define the following:
Electromotive force
Excitation
Compounding
Armature
Terminal voltage
Load current
Shunt windings
Series windings
c.
State the purpose of the following components of a direct current machine:
Armature
Rotor
Stator
Field
d.
Describe self-excited and separately excited generators.
e.
Describe the operation of compound-wound generators.
f.
Describe how the terminal voltage of a direct current generator is adjusted.
g.
State the basis behind each direct current generator rating.
h.
Describe the internal losses found in a direct current generator.
6
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