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Page Title:
Various types of alternating current (AC) motors, including operating characteristics |
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|  DOE-STD-1170-2003
i.
Describe the basis for the kilowatt and kilovolt-ampers ratings of an alternating
current generator.
j.
Describe the conditions that must be met prior to paralleling two alternating
current generators including, consequences of not meeting these conditions.
k.
Describe the difference between a stationary field, rotating armature alternating
current generator and a rotating field, stationary armature alternating current
generator.
l.
Explain the differences between a wye-connected and delta-connected alternating
current generator including advantages and disadvantages of each type.
7.
Electrical systems personnel shall demonstrate a working level knowledge of
various types of alternating current (AC) motors, including operating
characteristics, method of torque production, and the advantages of specific
motor types.
Supporting knowledge and/or Skills
a.
Describe how an alternating current motor produces a rotating magnetic field.
b.
Describe how an alternating current motor produces torque.
c.
Using field speed and rotor speed, calculate percent slip in an alternating current
motor.
d.
Explain the relationship between speed and torque in an alternating current
induction motor.
e.
Describe how torque is produced in a single-phase alternating current motor.
f.
Explain why an alternating current synchronous motor does not have starting
torque.
g.
Describe how an alternating current synchronous motor is started.
h.
Describe the effects of over and under-exciting an alternating current
synchronous motor.
i.
State some applications of the following types of alternating current motors:
Single-phase
Synchronous
j.
Describe the differences in starting and operating characteristics of premium
efficiency motors.
k.
Describe the characteristics and operation of motor controllers.
l.
Explain the following motor terms:
10
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