本文在分析带电压内环的有准备逻辑无环流电枢可逆调速系统工作原理的基础上 ,介绍140 0mm铝带冷轧机主传动电气调试和故障诊断。文中还介绍了一种实用新型的速度给定电路。理论分析和现场调试结果表明本文在调试和故障诊断中采取的技术措施是正确、有效的。 In this paper, based on the analysis of the working principle of a reversible variable speed system with a prepared logic non-circulating armature with voltage inner ring, the electrical commissioning and fault diagnosis of the main drive of a 140 0mm aluminum strip cold rolling mill are introduced. The article also introduced a utility model of speed given circuit. Theoretical analysis and on-site commissioning results show that the technical measures adopted in commissioning and fault diagnosis are correct and effective.