Discussion
Load sharing between two drives coupled to the same shaft is arranged by
Answer: A
Correct answer: giving one a speed loop and the other a torque reference
Two speed loops on one shaft fight each other: a slight difference in reference or calibration makes one motor drive the load and the other act as a brake. Putting the second on torque control, following the first’s torque output, makes it contribute without contesting the speed - the master-slave arrangement.
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