Armature reaction in a DC machine. In a DC machine, the main field is produced by field coils. In both the generating and motoring modes, the armature carries current and a magnetic field is established, which is called the armature flux. The effect of armature flux on the main field is called the armature reaction.
What is an armature winder?
The coil is a vital part of any electrical machine; if it breaks the motor will not work. It is the job of the Armature Winder to locate the broken parts, remove them and either replace them with new ones or completely rewind all the coils. They use various kinds of testing instruments to trace burnt out coils.
What is meant by field winding?
A field coil is an electromagnet used to generate a magnetic field in an electro-magnetic machine, typically a rotating electrical machine such as a motor or generator. It consists of a coil of wire through which a current flows.