Improvement and Optimization of Air Holes in the End Rings of Cast-aluminum Rotors
Triple-phase asynchronous motor is widely used in the new energy vehicle industry,but the air holes at the end ring of the cast aluminum rotor cause an increase in motor noise,a decrease in strength,and a decrease in conductivity,which affects the efficiency of the motor.In order to effectively reduce the gener-ation of air holes in the end rings of cast aluminum rotors,the control variable method and orthogonal analy-sis method were used to optimize the existing die casting process parameters,and an automatic extrusion de-vice to eliminate air holes in the end rings was proposed.The results show that when the hammer path is the same,the influence of pressure is the greatest in the pressure casting aluminum process,followed by the in-fluence of speed at high speed,and the influence of speed at low speed is the smallest.Moreover,the opti-mized die casting process parameters increase the qualification rate of the cast aluminum rotor to 74％,and the end ring extrusion can effectively solve the problem of end ring porosity.The tensile performance is im-proved by 37.5％,and the conductivity is increased by 12.4％.This provides a new solution to eliminate the end ring porosity of the cast aluminum rotor,It is expected to further improve the quality of cast alumi-num rotors.
万方数据
维普
