Ac / Dc Motors Flashcards
1
Q
WHAT PART OF A DC MOTOR ROTATES?
A
ARMATURE
2
Q
WHAT ARE THE TWO MAIN TYPES OF AC MOTORS?
A
INDUCTION AND SYNCHRONOUS
3
Q
WHAT IS THE WEARABLE PART OF A DC MOTOR CALLED?
A
BRUSHES
4
Q
HOW CAN YOU CHANGE THE DIRECTION OF A DC MOTOR?
A
CHANGE POLARITY
5
Q
HOW IS THE SPEED CONTROLLED IN AN AC MOTOR?
A
CHANGING FREQUENCY (VFD)
6
Q
WHAT ARE THE TWO MAIN TYPES OF DC MOTORS?
A
BRUSHED AND BRUSHLESS
7
Q
WHAT IS THE PART OF AN AC MOTOR THAT DOES NOT ROTATE CALLED?
A
STATOR
8
Q
DOES A DC MOTOR REQUIRE MORE MAINTENANCE THAN AN AC MOTOR?
A
YES, CHANGING BRUSHES AND BLOWING CARBON OUT OF MOTORS
9
Q
WHAT IS THE PART OF A DC MOTOR CALLED THAT THE BRUSHES RIDE ON?
A
COMMUTATOR
10
Q
WHEN RESISTANCE IS REMOVED FROM THE POWER CIRCUIT OF AN OVERHEAD CRANE DOES THE CRANE SPEED UP OR SLOW DOWN?
A
THE CRANE WILL SPEED UP
