ABSTRACT
Motors are ubiquitous. Motors are used to drive almost everything from pumps, conveyers, refrigeration equipment, air compressors and fans to a host of other operations too numerous to mention. A general assumption held by engineers and mechanics in many industries is that efficient motors are more expensive than their inefficient counterparts because heavier copper wire, thinner core laminations, higher-grade steel and higher-grade bearings cost more. Many businesses run motors that are too big for the task under the assumption that the additional horsepower may be needed in the future. Just as with motors, most pumps are bigger and more powerful than they need to be because in many cases production designers did not know what the exact pumping requirements were when the pumping system was being planned. Most motors need to run at or near their designed power rating in order for them to operate at optimal efficiency.
