DC motor - Siemens, s.r.o.
DC motor - Siemens, s.r.o.
DC motor - Siemens, s.r.o.
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Overview - faults with the brushes<br />
X Coupled machine out of balance Check coupling, rebalance system<br />
X Poor alignment Align machine set<br />
X Mechanical impacts Improve installation conditions<br />
Cooling fault<br />
X X X Cooling air too dry Change brush material<br />
Operation<br />
X X Silicone in the cooling air Remove silicone,clean <strong>motor</strong> and builton<br />
parts<br />
X Cooling air too dusty Change routing of cooling air, use air<br />
filter<br />
X Cooling-air rate too low (commutator<br />
temperature too high)<br />
Brush fault<br />
Improve cooling<br />
X X Incorrect or unsuitable brush material Change brush material<br />
Component fault<br />
X X Distorted commutator Skim commutator<br />
X X X High segment insulation Mill out segment insulation<br />
X Rotor out of balance Balance rotor<br />
[ID 567]<br />
5.6.5 Faults with the commutator<br />
Overview<br />
Table 5-5 Faults with the commutator<br />
Overview - faults with the commutator<br />
Fault characteristics<br />
↓ Beads of molten metal<br />
↓ General heavy blackening of segments<br />
↓ Some segments periodically blackened<br />
↓ Some segments heavily scorched<br />
↓ Flat spots on commutator<br />
↓ Ribbing/threading in circumferential direction<br />
Possible causes of fault Remedial measures<br />
System fault<br />
X Poor alignment Align machine set<br />
X Mechanical impacts Improve installation<br />
conditions<br />
Operating mode or operating fault<br />
X Continuous light load (part load) Change number and/or<br />
SIEMENS AG T61160347010001 (DMHO V9)<br />
Operating instructions 1GG6286-0NA4.-1VV1-Z 5-7
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