三相异步电动机带恒转矩负载运行,若电源电压下降5%,电机稳定后,( )。
发布时间:2025-12-14
A.电磁转矩下降,定子电流增大
B.电磁转矩下降,定子电流减小
C.电磁转矩不变,定子电流增大
D.电磁转矩不变,定子电流减小
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