COMMUTATOR FOR A BRUSH-COMMUTATED ELECTRIC MOTOR HAVING AN EXTENDED COMMUTATION INTERVAL

摘要

The invention relates to a disc commutator and a drum commutator for an electric motor having at least two commutator plates, each having a grinding surface segment for contacting a carbon brush, wherein the grinding surface segments are electrically separated from one another. In the disc commutator, the electrical separation runs between the grinding surface segments, inclined at an angle α to a commutator diameter. In the drum commutator, the electrical separation of the grinding surface segments is inclined in the longitudinal direction of the drum commutator, and encloses an angle ß with a projection of the rotational axis of the drum commutator onto the casing surface of the drum commutator.