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莱芜钢铁集团鲁南矿业有限公司选矿车间的球磨机采用绕线式交流异步电动机,功率为280kW,电压为6kV,采用转子回路串频敏变阻器启动方式,启动时间为20s;采用车间配电室集中补偿和无功率就地补偿方式。1现有启动运行方式的不足该频敏变阻器是20世纪70年代的产品,结构类似于没有二次绕组的三相变压器,具有结构简单、成
Ball mill of Laiwu Mining Group Co., Ltd. mineral processing workshop adopts winding type AC induction motor with power of 280kW and voltage of 6kV, using rotor circuit series frequency-sensitive varistor to start mode, starting time is 20s; using workshop power distribution room centralized compensation And no power compensation in place. A lack of existing start-up mode of operation The frequency-sensitive rheostat is a product of the 1970s, the structure is similar to no three-phase transformer secondary windings, has a simple structure, into