The document discusses different types of windings in electric machines. The armature winding induces voltage when current flows through it. The field winding produces the main magnetic flux. A turn consists of two connected conductors, and several turns form a coil. Multiple coils connected in series form a winding. For a P-pole machine, the electrical degree is defined as the angular distance between pole centers, which is always 180 degrees regardless of the number of poles. A coil spans two slots on the stator surface, and the distance between the coil sides is called the coil pitch. A coil pitch equal to the pole pitch is a full pitch coil, while a shorter coil pitch is a short or fractional pitch coil.
1. • Armature Winding is the windings, in which voltage is
induced.
• The Field Winding is the winding in which the main
field flux is produced when the current through the
winding is passed.
2.
3.
4.
5.
6. • Turn: A turn consists of two conductors connected to one end by an
end connector.
• Coil: A coil is formed by connecting several turns in the series.
• Winding: A winding is formed by connecting several coils in series.
7.
8.
9. • For a (P) pole machine, the electrical degree is defined as given
below.
10. • The angular distance between the centers of two adjacent poles on a
machine is known as pole pitch or pole span.
11. • The pole pitch is always 180 degrees electrical regardless of the
number of poles in a machine.
• The two sides of a coil are placed in two slots on the stator surface.
The distance between the two sides of a coil is called the coil-pitch. If
the coil pitch is one pole pitch, it is called the Full Pitch Coil. If the coil
pitch is less than one pole pitch, the coil is called the Short
Pitch or Fractional Pitch coil.
