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The duty cycle of a drive describes

  • A.the sequence in which the parts of the drive are switched on
  • B.how its load varies with time
  • C.the efficiency of the motor at each point in its operating range
  • D.the range of speeds over which the drive is able to operate

Answer: B

Continuous, short-time, intermittent and cyclic duties all place quite different thermal demands on a machine of a given size. Choosing the rating from the duty cycle rather than the peak load is what keeps drives from being grossly oversized.

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