高起动转矩特种电机转子新材料的试验研究

THE STUDY ON THE NEW MATERIAL OF SPECIAL MOTOR ROTORS USED FOR HIGH TORQUE

该项研究是为了开发一种成本低、电阻率高和力学性能好的电工新材料,用于高起动转矩特种三相异步电动机转子上,以达到提高电机质量、提高经济效益的目的。通过试验的方法,研究了Al-(22-28)%Si合金的P变质,RE变质,P与RE联合变质以及P-Cu变质,P-Cu与Na联合变质。对变质效果进行了综合分析比较,结果表明:含Si 量的变化对合金的金相组织、电阻率、抗拉强度和伸长率都有较大的影响;P-Cu与Na联合变质综合效果较好。最后得出结论:转子电工新材料采用Al-(25-28)%Si合金并用P-Cu与Na联合变质时,电阻率较高,抗拉强度和伸长率较好,综合效果最佳。

The purpose of this studying is to develop a kind of new electric material that are low cost, high resistivity and good mechanical property used for high torque special threephase asynchronous motor rotors, so that raising quality of motors and increasing economic profit. By the experimental method, the modification of the Al-(22-28)%Si alloys with P, RE, P and RE combination, P-Cu, P-Cu and Na combination are investigated. The results of modification are evaluated synthetically and showed: varieties of Si quantity influence largely microstructure, resistivity, tensile strength and percentage elongation; synthetic effect of modification with P-Cu and Na composite is better than other modification methods. And final conclusions are obtained: the modification of new electrical material Al-(25-28)%Si alloys used for rotors with P-Cu and Na combination make the resistivity is high, mechanical property is better and synthetically results are best.