Electric motors, taken together, make up the single largest end use of electricity in many developed countries. In many developed countries, in industrial applications, electric motors account for roughly 60% of electricity consumption; in the process industries,electric motors can account for more than 70% of electricity use. The cost of running a motor can be as much as ten times to the purchasing cost of a motor. Therefore operation of motors represents a huge potential for energy savings. The purpose of this courseis to provide an overview of the energy losses and energy efficiency factors in motors. It will also enable you to make cost calculations that allow different scenarios to be compared leading to sound energy efficient decisions.