Class 2 (2nd Engineer) MET 📅 Sep 2023

Exam Question

With reference to squirrel cage, induction, electric motors.

(a) Describe the construction of such a motor. (6)

(b) Sketch the torque against speed curve of such a motor (6)

(c) Describe a method employed by a retrofitted device used to improve the part load perormance of an induction motor. (4)

Reference Answer

(a) Construction of a Squirrel Cage Induction Motor
A squirrel cage induction motor is a robust and reliable AC motor in which the rotor resembles a squirrel cage , giving the motor its name.
Main Components
1. Stator (Stationary Part)

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