An induction motor is electrical equipment which converts electrical energy into useful mechanical energy. For any energy conversion equipment, a factor which guides the product is efficiency. Induction motors with most optimum design can have better efficiencies. In any industry, the major requirement is to have the equipment which is more users friendly and robust. Maintenance is a major issue with the equipment and thus induction motors which are robust are also maintenance free almost. Any industrialist who would like to go for procurement of motors will definitely concentrate on two issues. One is initial cost which is nothing but the cost incurred in procuring and installing the motors at site (also the depreciation value). The second main factor being the running cost. This is the cost incurred due to the power consumption of the motor. More efficient the motor is, lesser the power consumed. Hence energy efficiency plays a vital role in deciding the motor. Investor will then compare the performance of an ordinary motor with that of an energy efficient motor. He will have a calculation on payback period of the extra money invested in the energy efficiency motor. In case if the payback period is not so long, the better decision would be to go to energy efficient motor.
Coming to the application part of a motor, it's very hard to figure out a single application in industry which can operate without an induction motor. DC motor also is a solution, no doubt. But because of the flexibility that induction motors have, all DC motors are now being replaced by induction motors. To name few of the application of motors, pump, fan, crusher, conveyor, compressor, kiln, rolling mill, sugar mill, so on and so forth. The list goes to infinity.
Selection of induction motors are based on the starting torque requirement of an application. This is due to the fact that motor has to overcome its own inertia and also the load inertia and still manage to have some accelerating torque left in it to drive the load. Once the load is running, it's all a smooth procedure. Some applications like pump, fan, blower will require lesser torque during the starting due to the lesser resistive torque in them. Thus selecting the motor is not so critical process. Only thing to ensure is to have a motor rating which can sufficiently deliver the required rating of the load. There are some applications where we need to check if the motor that is offered can overcome the inertia and have sufficient accelerating torque to set the load at full speed.
When there is an endless need of induction motors, it's essential that we talk about the supply part of it. We have many companies in India which makes induction motors to satisfy the growing hunger of the industries. Crompton greaves, Kirloskar electric company ltd, Bharat Bijlee, ABB, Siemens, L&T, Jyoti are few major partners in the market share.
Major customers for these high voltage as well as low voltage motors in India are Atlas Copco, Flowserve, Sulzer pumps, Flowmore, Renuka sugars, JSW steels Reitz, Anrak, NLC, RSP and many more. We have different types of induction motors that we will try to list here. Slip ring induction motors which satisfy higher torque requirement. Crane duty motors which are suitable for more starts and stops to suit the requirement. Hollow shaft motors basically used in irrigation. Flameproof motors which are suitable to operate in hazardous area such as petrochemical industries and mining plants. Vehicle motor used to run the automobiles such as car. Normal cage induction motors suitable for wide variety of applications. This covers the wide application are where induction motors are the sole operators
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