Factors Governing Selection of Induction Motor
Q. State the factors governing the selection of induction motor
- Electrical motors are universally adopted as electric drive. Hence, has become necessary for the manufacturer to manufacture motors of various designs according to suitability and use in various classes of Industry.
- This has resulted into numerous types of motors. For this reason the selection of motor itself has become on important and tedious process
- Taking into account the conditions under which a motor is required to operate the following factors will decide the type of motor required.
1. Electrical characteristics :
Following are the electrical characteristics :
- Starting characteristic.
- Running characteristic.
- Speed control.
- Braking.
2. Mechanical characteristics :
These are as follows :
- Structural features that is type of enclosure, bearing etc.
- Method employed for transmission of power.
- Noise.
- Type of cooling.
3. Size and rating of motors :
Following are sub – heads under this characteristic :
- Rating of the motor
- Suitability of the motor for continuous, intermittent or variable loads.
- Overload capacity
4. Cost :
- Initial cost.
- Running cost
From the above it will be seen that the basic problem is to study carefully and thoroughly the load requirement, its surrounding and type of job it has to perform and then a motor which has the required characteristics and fulfill all the requirements is selected.