When a 3-phase AC induction motor and its driven machinery are running in one direction, ___________ the control circuit to instantly reverse the rotor’s direction of rotation puts tremendous torque requirements on both the motor and the machinery.
The mechanical stress placed on the drive-train coupling by this reverse torque can shear the teeth off of reduction gears.
It can shear the end off of the rotor shaft or drive journals.
The mechanical stress can also stretch drive belts or chains to cause premature wear and failure.
A) anti-plugging
B) plugging
C) inching
D) jogging
Show Answer
Answer:B
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