Types Of DC Generators

•  Separately-Excited DC Generators
• Self-Excited DC Generators

1. Series Wound Generators

2. Shunt Wound Generators

3. Compound Wound Generators

Separately-Excited DC Generators :-

•  A dc generator whose field winding is excited from an independent external dc source, such as a battery , the generator is called a Separately-Excited DC Generators.
• Dc machine depends upon a fixed polarity of the poles which does not vary with time.
• Field coil is connected to DC voltage source.

Self-Excited DC Generators :-

A dc generator whose field winding is excited by the current supplied by the generator itself, is called a self-Excited DC Generator.

1. Series Wound Generators :-

• In a series wound generator , there is only one filed winding which is connected in series with armature winding.
• So that whole current flows through the field winding as well as load.

2. Shunt Wound Generators:-

• In a shunt wound generator also there is only one field winding.
• The field winding is connected in parallel with the armature winding so that terminal voltage of the generator is applied across the load.

3. Compound Wound Generators :-

•  There are two field winding  
• One is connected across the armature winding
• Other is connected in series with the armature winding    

    Types Of Compound Wound Generators :-

a) Short-Shunt Compound Wound Generator :- 

Short shunt in which only shunt field winding is in parallel with the armature winding.

a) Long-Shunt Compound wound generator :

      Long shunt in which shunt field winding is in parallel with both series field and armature winding.