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The switching pattern of an inverter is generated by

  • A.comparing a reference with a carrier, or from a vector table
  • B.the machine's own back emf acting on the gate circuits
  • C.the mechanical position of the load being driven
  • D.the harmonic content of the incoming supply

Answer: A

Carrier-based and vector-based modulators are the two families, and both end with a set of on and off times for each device in each interval. The pattern is recomputed every switching period from the controller's voltage demand.

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