A d.c. generator whose field magnet winding is supplied current from the output of the generator itself is called a self-excited generator. There are three types of self-excited generators DEPENDING upon the manner in which the field winding is connected to the armature,

• SERIES generator - , the field winding is connected in series with armature winding so that WHOLE armature current flows through the field winding as well as the LOAD.
• SHUNT generator - , the field winding is connected in parallel with the armature winding so that terminal voltage of the generator is applied across it.
• Compound generator - there are two sets of field windings on each pole-one is in series and the other in parallel with the armature. A compound wound generator may be:

• Short Shunt in which only shunt field winding is in parallel with the armature winding
• Long Shunt in which shunt field winding is in parallel with both series field and armature winding

A d.c. generator whose field magnet winding is supplied current from the output of the generator itself is called a self-excited generator. There are three types of self-excited generators depending upon the manner in which the field winding is connected to the armature,