Commutator for a brush-commutated electric motor having an extended commutation interval

Abstract

The invention relates to a disc commutator and a drum commutator for an electric motor having at least two commutator plates, each having a sliding-surface segment for contacting a carbon brush, said sliding-surface segments being electrically separated from one another. In the disc commutator, the electrical separation extends between the sliding-surface segments towards a commutator diameter inclined at an angle α In the drum commutator, the electrical separation of the sliding-surface segments is inclined in the longitudinal direction of the drum commutator and forms an angle β with a projection of the rotational axis of the drum commutator on the casing surface of the drum commutator.

Dependencies are inferred from the claim text.