3 phase Squirrel Cage Induction Motor

What is the stationary part of the 3 Phase induction motor?

What is the rotating part of a 3 phase induction motor?

What is the common applications of induction motor?

• Fan, pumps, and Lathes

• Star-connected

• Delta connected

• Produce magnetic field

What causes the rotor in the induction motor to rotate?

• Induced electromotive force

• Permanent magnet

• Direct current

• Mechanical force

How is the rotating magnetic field in a 3 phase induction motor produced?

• 3-hase windings in the laminated steel core

• using permanent magnets

• by a single coil

• using DC power supply

What effect does the rotating magnetic field have on the rotor?

• It charge the rotor

• Rotor spin in the same direction as the magnetic field

• It stops the rotor

• Rotor rotates in the opposite direction of the magnetic field

Which of the following is a characteristics of 3 phase induction motor?

• Speed control is difficult

• High starting torque

• Low starting current

• Has brushes on the rotor

The 3 phase induction motor operates on the principle of

• full slip speed

• phase splitting

• rotating magnetic field

• alternating magnetic field

The rotor slots are slightly skewed to

• reduce locking tendency

• give a simple and rugged design

• reduce magnetic hum

• conduct current

What is the slip in an induction motor?

• Slip is the speed of the motor operating at full load

• Slip is the torque produced by the motor at full load

• Slip is the difference between synchronous speed and rotor speed, in percentage

• Slip is the maximum speed of the motor