Squirrel cage rotor construction pdf

For industrial and mining squirrel cage rotor construction pdf, 3-phase AC induction motors are the prime movers for the vast majority of machines. Share with your Facebook friends!

In modern industrialized countries, more than half the total electrical energy used in those countries is converted to mechanical energy through AC induction motors. The applications for these motors cover almost every stage of manufacturing and processing. Applications also extend to commercial buildings and the domestic environment. It is not surprising to find that this type of electric motor is so popular, when one considers its simplicity, reliability and low cost. To clearly understand how the VSD system works, it is necessary to understand the principles of operation of this type of motor. International standardization of physical dimensions and frame sizes means that motors from most manufacturers are physically interchangeable and they have similar performance characteristics. The only parts of the squirrel cage motor that can wear are the bearings.

Sliprings and brushes are not required for this type of construction. Improvements in modern prelubricated bearing design have extended the life of these motors. Although single-phase AC induction motors are quite popular and common for low power applications up to approx 2. 2 kW, these are seldom used in industrial and mining applications.

Single-phase motors are more often used for domestic applications. The information in this article applies mainly to 3-phase squirrel cage AC induction motors, which is the type most commonly used with VVVF converters. This may include feet or a flange for mounting. The magnetic path is laminated to reduce eddy currents, lower losses and lower heating. The cross-sectional area of these windings must be large enough for the power rating of the motor.