Answer : The most commonly used technique is Pulse Width Modulation in which a DC signal is switched on and off very rapidly, producing a sequence of electrical pulses to the inductor windings.
Important role of enclosure The enclosure of the must protect the windings, bearings, and other mechanical parts from moisture, chemicals, mechanical damage and abrasion from grit.
There are mainly two types of induction motor on the basis of power supply, Single Phase Induction Motor and Three Phase Induction Motor.