 | Conductive carbon dust left by worn brushes is cleaned from
the armature; then each commutator is checked for grounds and bar-to-bar shorts with
detailed electrical testing. |
| Technicians repair most commutator problems in-house. For
severely damaged or non-repairable commutators, we have several excellent sources for fast
delivery of custom manufactured replacements. |
| Coils are manufactured in-house to assure proper fit. This
eliminates constant bending and shaping during installation which can damage coil
insulation. |
| Proper banding is critical in DC repair. This ensures that
windings are held in position during high-speed operation. |
| Field coils are checked using voltage drop testing. Bad fields
and interpoles are rewound in our shop on custom-made forms. |
| TIG welding is available to eliminate soldered joints where
design dictates. |
| All commutators at Jenkins Electric are turned, undercut, and
chamfered to provide the best possible surface for brush contact. |
| For corrosive or other severe duty environments, commutator
platinum plating is available to extend wear life. |
| Neutral setting adjustments are made during final machine
testing to insure proper operation. |
DC
motors and generators introduce additional complexity into the repair process. The
addition of (1) a commutator with brushes, and (2) rotating armature coils subjected to
centrifugal force are factors not involved in typical AC repair.
