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84年生产的SS3型机车用牵引电动机主极温升偏高(接近允许温升)且换向裕度较小。为此我们做了下述改进,改进后的试制样机主极温升直流小时的状态下降到135.8°C,换向裕量也比标准降低一级左右,其他特性能符合标准要求。改进项目及内容为: 一、加大了主极线规。原主极线规为3.8×35(毫米),改进后的为4.25×36.5(毫米)。使得主极电流密度从原来的3.94安/毫米~2降到3.48安/毫米,从而减少了发热量。虽然增加了铜重,但由于改进方案缩短
The main pole temperature rise of traction motor for SS3 locomotive produced in 1984 is too high (approaching the allowable temperature rise) and the commutation margin is small. To this end, we made the following improvements, improved prototype prototype pole temperature rise DC hour down to 135.8 ° C, the commutation margin is about one level lower than the standard, and other features to meet the standards. Improve the project and content: First, to increase the main pole line regulation. The original main pole gauge is 3.8 × 35 (mm), improved to 4.25 × 36.5 (mm). As a result, the current density of the main pole is reduced from 3.94 A / mm 2 to 3.48 A / mm, thereby reducing the heat generation. Although the increase of copper weight, but due to shorten the improvement program