Vector Magnetic Characteristic Technology for Development of Super Premium Efficiency (IE4 Level) Motor

In this paper we will discuss about the development of IE4 level motor proposed by IEC, which is new target for international efficiencies. Efficiency classes IE1-IE4 are defined in international standard IEC 60034-30. The draft version of IEC 60034-31 defines the new class IE4. The IE-codes replaces the former voluntary Eff classification of electric motors as shown in Table I. The Eff classes are based on a voluntary agreement between the EU and the CEMEP in 1998.