Machine Parts

Armature reaction:                                              When current flows in the armature conductors a flux surrounds these conductors. The direction of this armature flux is such that it reduces the flux from the field poles, resulting reduction in both generated voltage and terminal voltage. So we can say that the interaction between armature flux and field flux is called armature reaction. Effects on a loaded generator:                                                  When a load is connected to a generator, of course current flow exists. When current flows through a conductor a magnetic field is set up around the conductor. When several conductors are placed together, the flux from each conductor is combined to produce a resultant flux. The flux from the conductor on the left side of the armature and the flux from the conductor on the right side of the armature cause a resultant flux in the centre of the armature that is downward in direction. There