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The dc link of a drive sits

  • A.between the supply and the rectifier input
  • B.in parallel with the machine windings
  • C.between the rectifier and the inverter
  • D.between the inverter and the machine terminals

Answer: C

Correct answer: between the rectifier and the inverter

The dc link is the reservoir between the two conversion stages: the rectifier charges it from the supply and the inverter draws from it to feed the machine. Its capacitance holds the voltage steady against the current pulses each stage demands, and it is what decouples the input frequency from the output.

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