Auxiliary Generator is a very vital part for EMD Locomotives manufactured by Indian Railways. It
consist of one three phase pilot exciter assembly and
is driven by main engine shaft through gear train. Its
main function is to develop 74 VDC at all speed of
engines required for battery charging which is used further for cranking the locomotives.
This machine is a brushless AC Generator. The
generated voltage of the generator is rectified by 3-
phase 6 wave diode system to produce DC voltage
and is connected to the battery terminals.
The nominal output is 18kW at 55VAC. The pilot
fields are installed on common shaft and are the
critical features of this machine.