Red Seal Electrician Practice
AC generationQuestion 1289 of 1506

A wound rotor induction machine is driven above synchronous speed, with connections to both the stator and the rotor. What is it called?

  1. A synchronous condenser with a rotor
  2. A permanent-split capacitor generator
  3. A doubly-fed induction generator
  4. A static phase converter for the rotor
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Correct answer: A doubly-fed induction generator

Connections to both stator and rotor make it doubly fed, and the speed can vary widely.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.8: Wound Rotor Induction Motors

Practice ac generation

Questions last reviewed: 18 October 2026