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Computational delay in a digital drive is usually compensated by

  • A.increasing the dead time between transitions
  • B.sampling the current twice as often as necessary
  • C.predicting the current one sample ahead
  • D.reducing the switching frequency of the inverter

Answer: C

The command computed from this sample is applied in the next interval, which is a delay the loop has to allow for or it becomes sluggish. Predicting the state at the moment of application recovers most of the lost bandwidth.

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