Question

What are the different types of DC machines?

Answer 1

Dc machine is classified as 

1.  self excited
   
2.  separately excited
   
3.  permanent magnet 
   

Self excited Dc motor is further classified as 

1. series wound
   
2. shunt wound
   
3. compound wound
   

compound wound is further classified as

1. cumulative compound
   
2. differential compound
   

Each cumulative compound and differential compound  are classified as 

1. long shunt
   
2. short shunt