1. Simple description

Motors rely on a very simple principle that most of us have seen when the ‘like’ poles of two magnets are brought close together. A force flings them apart, as two south poles repel, as two north poles repel.

2. Squirrel cage induction motor

The basic construction of AC induction motors has changed very little over the years. The Squirrel cage induction motor which is the most common electric motor has four main parts:

1. Stator: is a stationary component. Made of copper windings that carry current. The stator’s coils set up a magnetic field that moves in a circular motion. The stator surrounds the Rotor.

2. Rotor: as the name suggests, rotates. It is caused to rotate under the influence of the magnetic field of the stator. The rotor tries to keep up with the stator’s magnetic field.
   

3. Fan: used to cool the motor.
   

4. Bearings and seals: allows motor shaft to move smoothly. Reduces energy losses that would occur through friction. The seals keep dust from entering the motor.