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电动机转矩过小电动机起动转矩小,选型不合理;定子绕组断路,可见三相电流不平衡,并伴有异响;导线过细且长,电压降太大;电源电压过低,起动转矩变小。操作方法不对全压起动误认为是降压起动;带动较大负荷起动;电机转动受卡;电机轴承损坏或间隙过小;开关未全合上。接线错误或接触不良电机绕组接头误接到了电源零线上,造成两相起动;接线螺母未拧紧;星三角形接线错误。
Motor torque is too small motor starting torque is small, the selection is not reasonable; stator winding circuit, we can see three-phase current imbalance, accompanied by abnormal sound; wire is too small and long, the voltage drop is too large; power supply voltage is too low, Moment smaller. The method of operation is not full voltage starting mistakenly believe that the buck start; drive greater load start; motor rotation by the card; motor bearing damage or gap is too small; switch is not fully closed. Improper wiring or poor contact The motor winding connector mistakenly connected to the zero line of the power supply, resulting in two-phase start; wiring nut is not tightened; Star delta wiring error.