AC Motors
OBJECTIVES
TERMINAL OBJECTIVE
1.0
Given the type and application of an AC motor, DESCRIBE the operating characteristics
of that motor including methods of torque production and advantages of that type.
ENABLING OBJECTIVES
1.1
DESCRIBE how a rotating magnetic field is produced in an AC motor.
1.2
DESCRIBE how torque is produced in an AC motor.
1.3
Given field speed and rotor speed, CALCULATE percent slip in an AC motor.
1.4
EXPLAIN the relationship between speed and torque in an AC induction motor.
1.5
DESCRIBE how torque is produced in a single-phase AC motor.
1.6
EXPLAIN why an AC synchronous motor does not have starting torque.
1.7
DESCRIBE how an AC synchronous motor is started.
1.8
DESCRIBE the effects of over and under-exciting an AC synchronous motor.
1.9
STATE the applications of the following types of AC motors:
a.
Induction
b.
Single-phase
c.
Synchronous
Rev. 0
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