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Discontinuous conduction affects the drive by

  • A.leaving the speed unchanged while raising the current ripple
  • B.preventing the machine from developing any torque at all
  • C.raising the speed for a given firing angle
  • D.lowering the speed for a given firing angle of the converter

Answer: C

With the current interrupted, the mean voltage rises above the value the continuous-conduction formula predicts, so the machine runs faster than expected. The relation between firing angle and speed also becomes nonlinear.

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