Write in brief about the operating principle of 3-phase induction motor with correct diagram.
Answers
An electrical motor is an electromechanical device that converts electrical energy into mechanical energy. In the case of three-phase AC (Alternating Current) operation, the most widely used motor is a 3 phase induction motor, as this type of motor does not require an additional starting device. These types of motors are known as self-starting induction motors.
To get a good understanding of the working principle of a three-phase induction motor, it’s essential to understand the construction of a 3 phase induction motor. A 3 phase induction motor consists of two major parts:
A stator
A rotor
The stator of three phase induction motor is made up of numbers of slots to construct a 3 phase winding circuit which we connect with 3 phase AC source. We arrange the three-phase winding in such a manner in the slots that they produce one rotating magnetic field when we switch on the three-phase AC supply source.