Alternators can be classified as below
Based on rotor
1. Salient pole type
2. Smooth cylindrical type
Based on output power
1. Single Phase
2. Three Phase
Based on the working principle
1. Revolving armature type
2. Revolving field type
Based on the speed on rotation
1. Turbo alternator
2. Low speed alternator
Based on coiling
1. Air cooling
2. Hydrogen cooling
alternator is divided in two parts.
a.c alternator has divided into two parts.
d.c alternator has divided into four parts.
i have dry type transformers can you help me that how many
tests i can do to know the performence of transformer and
also please tell me about the BDV test and Insulation
resistance test in oil cooled transformers