Is is a dc motor , it's run thro dc drive. There is a feed back signal taken from motor side to drive. Feedback taken from tacho generator. The motor is started slowly and it is running in 50% speed. But suddenly speed going up down . Then alarm came Tach_f. I have checked the tacho generator...
Sirs,
Am facing problem in dc drive that is dc tacho fault . I have checked tacho and found values of armature resistance are same in all segments in commutator.
But motor speed not in control. It is automatically varying and suddenly stopped. Is there any bypass method available for tacho...