Induction motor improvement for energy saving technologies

Recent attention has been focused on energy saving problems in Russia, these latter being of prime consideration. Nowadays our society has come to realize that this factor of economic life is a decisive one on the way of achieving higher indices of country economic development. Possessing power consuming of manufacturing several times greater than in the developed countries of the world and being excessively wasteful when using thermal and electric energy one can´t achieve high level of energy saving. The purpose of the given paper is to show the possibility of actual energy saving by induction motor improvement for a variable speed drive. Power electronics, microprocessor techniques and electrical machines are integral parts of a modern drive. As for the marked changes of the first two components of the drive they are being widely discussed in the press but the problem of electrical machines improvement is kept in the shade. Modern induction motors should meet the variable speed drive requirements. Individualization of orders and customer requirements to induction motors allows electro technical industry to steadily raise the rate of production under the conditions of market economy. Taking into consideration marked output of different rating induction motors and their primary role in electric energy conversion into mechanical one even slight improvements of engineering economical indices will pave the way for producing an effect. However, a variable speed drive based on induction motors is slowly introduced. One should consider induction motor improvement combined with the development of power electronics, systems of control and emergency protection as a final result - effective energy saving in all the spheres of their usage.