Induction Motor Applications


     Most of the motors used for household and commercial purposes are induction motors. Use of induction motor as induction generators is insignificant. An induction motor as a nearly constant speed motor characteristics. Other types of motors are used only in special purpose applications where variable speed control is needed.


     Nowadays induction motors can be seen everywhere from a workshop to large industrial applications. Different ratings of three-phase induction motors from kilowatt of thousands of kilowatts are available in the market. 


     The selection of induction motors can be made according to there load characteristics. Because it gives us horsepower requirement, starting torque, speed variation, duty cycle, and some other ratings of that motor. So that it is easier to specify a particular rating of motor to a particular application.


      Application of various types ( with respect to starting torque and starting current ) of squirrel-cage motors and wound-rotor motors are mentioned below:



Squirrel-Cage Motor : 


Induction Motor Applications

(i) General purpose with normal torque and normal starting current.

      Applications : Fans, blowers, centrifugal pumps, line shafting, etc.


(ii) High torque, low starting current.

      Applications : Conveyors. compressors, crushers, agitators, reciprocating pumps. etc. 


(iii) High torque, medium and high slip.

     Applications : Used for high inertia loads, such as sheers, punch presses, die stamping. etc. 


(iv) Low starting torque, normal starting current. 

     Applications : For loads of low inertia and low starting torque requirement, such as fans and centrifugal pumps.



Slip-Ring Motor :


apllications of induction motor

     These motors are used in situations where high starting torque is required such as in hoists, compressors, lifts, crushers, large ventilating fans, cranes etc.



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