ABSTRACT
Induction motors play an important part in many different types of domestic and industrial processing machinery. The popularity of the motor is due to its ruggedness and operational reliability. The induction motor has two main parts; a stationary part called the stator and a rotating part called the rotor, in which the mechanical load is connected. The stator has windings slotted into a segmented iron frame to reduce eddy current and magnetic losses. There are various methods to control the induction motor torque and speed, varying in complexity, performance, and cost. Reduced voltage method is used in many small induction motors coupled to fans and air blowers. Controlling the voltage and frequency supplied to the motor is the heart of the induction motor’s speed and torque control. Induction motor variable speed drives can be powered by either an alternating current or direct current power source.
