Shunt generator
Short shunt generator
Series generator
Long shunt generator
To oppose the shunt field
To oppose main field
To assist the shunt field
To oppose armature
Trailing Pole Tip
Temporary Pole Tip
Topmost Pole Tip
Temporary Present Tip
General Neutral Axis
Geometrical Neutral Axis
Geographical Neutral Axis
Geometrical Numerical Axis
By changing commutator
By reversing direction
By shifting the brush position
By changing armature