Types of Three Phase Induction Motor

Types of Three Phase Induction Motor

An induction motor is also called asynchronous motor as it runs at a speed other than the synchronous speed. Like any alternative electrical motor, induction motors have two main parts – the rotor and the stator.



As the name indicates stator coil could be a stationary a part of induction motor. A three part offer is given to the stator coil of the induction motor.


The rotor could be a rotating a part of induction motor. The rotor is connected to the mechanical load through the shaft. The rotors of the 3 part induction motor square measure more classified as:

  1. Squirrel Cage Rotor
  2. Slip Ring Rotor or Wound Rotor or Phase Wound Rotor

Depending upon the kind of rotor used the three-phase induction motor is classed as:

  1. Squirrel Cage Induction Motor
  2. Slip Ring Induction Motor or Wound Rotor Induction Motor or Phase Wound Induction  Motor

The construction of stator for both the kind of three phase induction motor remains the same and is discussed in brief below.

Stator of Three Phase Induction Motor

The stator coil of the 3 part induction motor consists of 3 main parts:

  1. Stator frame
  2. Stator core
  3. Stator winding or field winding

Stator Frame

It is the outer part of the three-phase induction motor. Its main operate is to support the stator coil core and therefore the field coil. It acts as a covering and provides protection and mechanical strength to all the inner parts of the machine. The frame is either created from formed or unreal steel. The frame of 3 part induction motor ought to be sturdy and rigid because the air gap length of 3 part induction motor is incredibly tiny. Otherwise, the rotor won’t stay concentrical with stator coil which is able to create to the unbalanced magnetic pull.


You may also like...