3842
« on: October 17, 2012, 06:38:16 PM »
You will end up overheating the motor windings from the constant starting loads without enough time to cool them back down before the next cycle. Most motors can only tolerate a limited amount of starts in a period of time.
EVEN with a VFD you are limited. Also those fast stops ADD heat to the windings as well.
IF fast starts are needed then you HAVE to go UP on /torque to get the job done faster. THEN you have an inertia problem with larger framed motors (;-) It gets to be a vicious circle with no end in sight. LIGHT inertia high torque servos are the answer
3 sec runs will not give most ac motors time to get to speed much less cool off before the next cycle begins.
Just a thought, (;-) TP