Draw and list the Difference between self excited and separately excited. Self Excited DC Generator 1.In self excited dc generators the coil gets the excitation voltage from the voltage generated in it after a time period but not in the starting itself, 2.self excited generator works on its own feedback Seperaty Excited DC Generator 1.in separately excited generator an external supply is must for supplying exciting voltage to the coil 2.separately excited generator need a external source to work