Dc generator are not widely used, since most of the appliances works on AC. But the study of DC Generator is important to under stand the concept of other DC machine.
Basic principle:
# Right hand thumb rule
~Thumb: Direction of motion of conductor.
~Fore finger: Direction of field
~Middle finger: Direction of induced emf.
#Types
1. separately excited:
rarely used in practice
2. Self exited :
There are of three types
a. Series
b. Shunt
c. Compound
EMF equation:
EMF = P¤ZN/60A
P= No of poles
¤=flux in weber
Z = No of conductors
N = speed in rpm
A = No of parallel paths = 2 wave winding ,P for lap winding.
Basic principle:
# Right hand thumb rule
~Thumb: Direction of motion of conductor.
~Fore finger: Direction of field
~Middle finger: Direction of induced emf.
#Types
1. separately excited:
rarely used in practice
2. Self exited :
There are of three types
a. Series
b. Shunt
c. Compound
EMF equation:
EMF = P¤ZN/60A
P= No of poles
¤=flux in weber
Z = No of conductors
N = speed in rpm
A = No of parallel paths = 2 wave winding ,P for lap winding.
