In DC machines, the field-flux axis and armature-MMF axis are respectively along

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Electrical Engineering XYZ MCQs

In DC machines, the field-flux axis and armature-mmf axis are respectively along:

  1. Quadrature axis and direct axis
  2. Direct axis and indirect axis
  3. Quadrature axis and interpolar axis
  4. Direct axis and interpolar axis

Correct answer: 4. Direct axis and interpolar axis

Explanation:

In a DC machine:

  • The direct axis is aligned with the armature mmf (magnetomotive force), which is the axis along which the magnetic field produced by the armature winding is aligned.
  • The interpolar axis is aligned with the field flux axis, which is the axis along which the magnetic flux produced by the field winding is aligned.

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