Electric motors are of utmost importance in industrial as well as agriculture sector. These motors found their application as constant speed drives with very low rating as well as variable speed drives with very high rating. This paper describes the various factors affecting the efficiency of motor and method to increase it on the basis of comparison with various standards. An incremental difference in the efficiency is also discussed.

Improving energy efficiency is the fastest, cheapest and cleanest way to get reliable power to more people. Well over half of the world’s electricity is consumed
by just four products: electric motor systems, lighting, room air conditioners, and residential refrigerators.