Worksheets2024 3-Phase Induction Motor
Total questions: 15
Worksheet time: 8mins
3 coil windings and 3 phase AC input are given to it.
This description is referred to..
Stator
Rotor
Brush
Ring
When a 3-phase current passes through the stator winding, it produces (a) , which causes the rotor to turn.
The rotational speed of magnetic field is known as
Motor speed
Rotor speed
Synchronous speed
Shaft speed
When a closed conductor is placed in a magnetic field, according to Faraday's Law; as magetic field is varying, an ____ will produced in the loop which then produced a current in the same loop.
Torque
EMF
rotational speed
force
The difference between synchronous speed and rotor speed is known as
slip speed
shaft rotation speed
rated speed
Which statement are NOT TRUE about Induction Motor
No permanent magnet
No brushes
No commutator ring
Not a self started
In order to make induction motor become an induction generator, the rotor speed must be ___ that RMF speed
lower
higher
equal
Name a part of induction motor construction that helps the insulation of the internal electrical coil from melting.
bearing
fan
motor frame
When electricity (current) passes through a wire, (a) is generated around wire.
If we place a wire (with a current flowing through it) in a magnetic field, the wire's magnetic field will interact with the magnetic field of the permanent magnet, causing the wire to experience a...
(a)
A 230 V, 15 hp, 6-pole, 50-Hz, Y-connected induction motor has a full-load slip at 4%.
Find the synchronous speed of the motor in rpm:
1200
1500
1000
960
A 230 V, 15 hp, 6-pole, 50-Hz, Y-connected induction motor has a full-load slip at 4%.
Find the rotor speed of the motor at rated load in rpm:
1728
960
1000
950
A 230 V, 15 hp, 6-pole, 50-Hz, Y-connected induction motor has a full-load slip at 4%.
Find the rotor frequency of the motor at rated load in Hz:
50
2
2.5
2.4
A 230 V, 15 hp, 6-pole, 50-Hz, Y-connected induction motor has a full-load slip at 4%.
Find the shaft torque of this motor at the rated load in N.m
11.6
106.85
1.22
111.3
A 230 V, 15 hp, 6-pole, 50-Hz, Y-connected induction motor has a full-load slip at 4%.
What is the slip speed of the motor at full load condition in rad/s:
960
381.97
40
4.19
