兖州矿业 (集团 )公司南屯煤矿和天津市民用通用电器厂对该矿副井提升机 860ｋＷ电动机的电控系统进行了适度和切合实际的综合改造 ,成功地解决了我国普遍存在的投产多年的矿山提升机电控系统老化及故障率高的难题。此项改造设有亚同步继电器 ,当下放重物达到亚同步速度时 ,继 The Yanzhou Mining (Group) Company Nantun Coal Mine and Tianjin Civil General Electric Factory conducted a modest and practical comprehensive renovation of the electric control system for the 860kW motor of the auxiliary shaft hoister of the mine, successfully solving the problems that have been commonly put into operation for many years Mine hoist electrical control system aging and high failure rate problems. This transformation has a sub-synchronous relay, when the current heavy objects to sub-synchronous speed, follow