AC/DC Flashcards
_____ motors are single phase having two lines as input (positive & negative).
DC
_____ motors can be either single phase or three phase.
AC
Which motor part contains windings and is always stationary?
Stator
Which motor has brushes on the commutator?
DC
Name the 2 main types of AC motors:
1) Induction
2) Synchronous
Why does a DC motor require more maintenance than an AC motor?
Because it has brushes
Name the 2 different types of DC motors:
1) Brushed
2) Brushless
What controls the speed in an AC motor?
Variable frequency drive
How do you change direction on a DC motor?
Change polarity
Which motor requires a commutator?
DC motor
How do you change direction on an AC motor?
Switch any 2 leads
How do you control speed on a DC motor?
Shunt out resistance
What are the wearable parts of a DC motor?
Brushes
