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Speed regulation of a drive is

  • A.the time taken to respond to a change of reference
  • B.the change in speed from no load to full load
  • C.the ratio of its highest usable speed to its lowest
  • D.the smallest change of speed the drive can resolve

Answer: B

Expressed as a percentage of the rated speed, it describes how much the speed droops as the load is applied in open loop. A closed-loop drive reduces it to a fraction of a per cent, which is why feedback is fitted wherever the speed matters much.

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