异步电动机短路反馈电流衰减的时间常数

TIME CONSTANT OF SHORT-CIRCUIT FEEDBAK CURRENT ATTENUANCE IN ASYNCHRONOUS ELECTRICAL MOTOR

在异步电动机定子绕组端点突然短路时，每个闭合的转子绕组为了维持磁链守恒，都要产生直流电流并在定子绕组中感应短路电流交流分量，称为异步电动机的短路反馈电流周期分量。因此，该电流是按转子绕组的时间常数衰减到零的。不同转子结构的异步电动机，短路反馈电流周期分量可能按一个或两个时间常数衰减，不能一概而论。

When short circuit occurs at the end point of the stator winding,a direct current is produced in every rotor winding to keep magnetic linkage constant and,at the same time,an inductive current appears in the stator winding.The AC part of the inductive current is called asynchronous electrical motor short circuit feedback periodic current,which will attenuate to zero according to the time constant of the rotor winding.The attenuance may vary with rotor winding construction,according to one or two time constants.