YMB—50S型隔爆三相异步电动机是为国产第一台电牵引采煤机MG62—D型采煤机配套的截割主电机。在研制过程中采用了优选电磁方案、端盖浮动结构、四角强制水冷等措施收到了较好效果,使其外形尺寸和电气性能在同类电机中处于先进行列。本文较详细地分析介绍了这些技术措施。 YMB-50S explosion-proof three-phase asynchronous motor is the cutting main motor supporting the first domestic electric traction shearer MG62-D shearer. In the development process using the preferred electromagnetic scheme, the end cap floating structure, four corners forced water cooling and other measures received good results, so that its dimensions and electrical performance in the same advanced motor in the ranks. This article analyzes and describes these technical measures in more detail.