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ELECTRICALMACHINES : ABSTRACT
Induction motor design has a major effect on the behavior and performance of an induction motor.
The induction motor can be treated essentially as a transformer for analysis.
In order to perform useful work, the induction motor must be started from rest and both the motor and load accelerated up to full speed.
The starting torque of an induction motor starting with a fixed voltage, will drop a little to the minimum torque known as the pull up torque as the motor accelerates, and then rise to a maximum torque known as the breakdown or pull out torque at almost full speed and then drop to zero at synchronous speed.
Once the motor is up to speed, it operates at low slip, at a speed determined by the number of stator poles.
