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True or false: a drive must be able to brake electrically in order to stop.

  • A.True, unless the drive is fitted with a flywheel to absorb the stored energy
  • B.False, since a drive that is switched off stops instantly whatever its inertia
  • C.False, since a mechanical brake or simple coasting will also stop it
  • D.True, since a drive can only be stopped by electrical means of some kind

Answer: C

Removing the supply lets friction and windage bring the drive to rest, and a mechanical brake speeds that up. Electrical braking is chosen when the stop must be quick, controlled, or when the energy is worth recovering.

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