A large part of electrical energy consumption goes to induction motor (IM) which is serving to industries and it is known that efficiency is drastically reduced in these motors at part-load operation. The part-load operation of induction motors cannot be avoided in many industrial applications like spinning drive in textile industry, hoist drive in mineral industry, pumps in all types of process industries, etc. The part load efficiency and power factor of the induction motor can be improved by adapting the magnetizing level in the motor in accordance with load torque and speed and, hence,...