Chosen aspects of present world situation in field of induction motors

Magnitude of the induction motors in present industrial electric drive. Constructional, technological, material and productive features of the current industrial induction motors. The efficiency as one from of the most important at present parameters of such motors. The different methods of determination the efficiency of motors and the different criteria for classes of efficiency of motors are on world applied at present. This creates barriers for technological development of induction motors and for worldwide market of such motors. The paper presents the workings undertaken by the international standardization (IEC) in aim of elimination these barriers