Research on the Combination of IE3-IE5 Series Energy-efficient Three-phase Induction Motor

The study of motor energy efficiency has gradually become a research hotspot. In this paper, the optimization analysis of motor energy efficiency is carried out for the widely used three-phase induction motors, based on keeping the stator and rotor structure parameters unchanged, a reasonable combination of motor steel material, winding type and bar conductor material can realize the change of motor energy efficiency class. Firstly, the influence of stator and rotor steel materials on iron consumption is analyzed according to the triple equation of iron consumption, and the loss distribution and efficiency of DW540, DW470, DW360, DW310, DW270, 1J22, and amorphous alloy materials are discussed. Secondly, simulation models are built and magnetic circuit calculations are carried out for different winding types to summarise the motor efficiencies achieved with different winding types. Then, the impact of cast copper and aluminum rotors on energy efficiency is compared and analyzed. Finally, the combinations of steel material, winding type, and bar conductor material are classified according to the IE3, IE4, and IE5 energy-efficiency standards. The results show that the motor’s energy efficiency can be improved by up to 95.3% by choosing the right combination.