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A voltage source inverter feeding an induction motor presents to the machine

  • A.a controlled voltage of controlled frequency
  • B.a controlled current whose waveform is independent of the machine
  • C.a fixed voltage at the frequency of the incoming supply
  • D.a direct voltage with no alternating component at all

Answer: A

The stiff dc link and the switching pattern together define the voltage applied, and the machine draws whatever current results. It is the arrangement used in almost every modern drive, generally with pulse width modulation.

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