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What is the condition of retrogressive winding in dc machines?
1. Yb > Yf
2. Yb < Yf
3. Yb = Yf
4. Yb = 0.5 Yf

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Correct Answer - Option 2 : Yb < Yf

The coil side displacement of the front-end connection is called the front pitch.

The coil side displacement of the back end connection is called back pitch.

The direction in which the winding progresses depends upon which is more Yb or Yf.

  • For retrogressive winding Yb < Yf
  • For progressive winding Yb > Yf

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