铸铝转子端环气孔的改善及优化  

Improvement and Optimization of Air Holes in the End Rings of Cast-aluminum Rotors

作　　者：杨永涛 黄英杰 YANG Yongtao;HUANG Yingjie(Xinzhi Group Co.,LTD.,Taizhou Zhejiang 318000,China)

机构地区：[1]信质集团股份有限公司,浙江台州318000

出　　处：《微电机》2024年第10期72-76,共5页Micromotors

摘　　要：三相异步电机被广泛运用于新能源汽车行业,但铸铝转子端环处的气孔造成了电机的噪声增加、强度降低、电导率降低,影响了电机的效率。为了有效减少铸铝转子端环气孔的产生,采用控制变量法及正交分析法对现有的压铸工艺参数进行了工艺优化,并提出了一种消除端环气孔的自动挤压装置。结果表明:当锤头路径相同时,压力铸铝过程中,压力的影响最大,高速时的速度影响次之,低速的速度影响最小,且工艺优化后的压铸工艺参数使铸铝转子的合格率提升至74%,且端环挤压可有效解决端环气孔问题,抗拉性能提升了37.5%,电导率提高了12.4%,为消除铸铝转子端环气孔提供了新方案,有望进一步提升铸铝转子品质。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 generation of air holes in the end rings of cast aluminum rotors,the control variable method and orthogonal analysis method were used to optimize the existing die casting process parameters,and an automatic extrusion device 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 influence of speed at high speed,and the influence of speed at low speed is the smallest.Moreover,the optimized 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 improved 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 aluminum rotors.

关 键 词：铸铝转子 压力铸铝 工艺参数优化 端环挤压 

分 类 号：TM343[电气工程—电机] TM305