Thanks for the comments castera. These failures have occurred in a similar pattern on both motors. We have been in discussions with two brush manufacturers and have tried various options - none of which seems to have eliminated the problem. We are currently in the process of determining the...
jomega
The motor drives a slurry pumping system via a crankshaft and three piston/diaphragm system. Changes made 5 years ago were to decrease piston bore, requiring increased speed for same capacity. We have no data on what occurred prior to the change, so amunable to comment on 1, 2 or 3...
Addn info/Correction to original question. The motor has been operating for approx 4-5 years at 1538 rpm without falling apart, so it would seem that mechanically at least the increased speed of operation is within the motor design margin.
We have seen significant brush wear out (split...
The power station I work at has a separately excited shunt wound DC Drive Motor (682kW) for driving a diaphragm pumping system. Rated speed is 1244 rpm @ full field current. Some years ago the pump design was changed, resulting in a need to increase motor speed. It appears that field...
