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Which of the following would improve the dynamic response of a drive?

  • A.Removing the speed feedback from the control loop
  • B.Reducing the referred inertia of the load
  • C.Increasing the referred inertia of the load at the motor shaft
  • D.Reducing the torque capability of the motor and its converter

Answer: B

Response depends on the ratio of available torque to inertia, so anything that lowers the inertia or raises the torque helps. Higher gearing, a lighter coupling and a low-inertia rotor are the usual means of getting it.

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