초록 ▼

In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example by an additional magnet (4) placed axially be

In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example by an additional magnet (4) placed axially behind the brushes (6), such that the magnetic field (M) deflects the moving charge carriers in the brushes (6), to thereby reduce the current density at the trailing edges (6.2) of the brushes (6).

대표청구항 ▼

[ What is claimed is:] [1.] A commutator motor, comprising:a commutator arranged to rotate in a main rotation direction;a brush which presses against said commutator in a longitudinal, contact-pressure direction, and through which an operating current flows essentially in the longitudinal, contact-p

[ What is claimed is:] [1.] A commutator motor, comprising:a commutator arranged to rotate in a main rotation direction;a brush which presses against said commutator in a longitudinal, contact-pressure direction, and through which an operating current flows essentially in the longitudinal, contact-pressure direction;wherein said brush has a leading edge and a trailing edge relative to the main rotation direction of said commutator; andan arrangement that produces a commutation magnetic field that is aligned essentially at a right angle to the longitudinal, contact-pressure direction in which the operating current flows;wherein charge carriers that are moved by the operating current are deflected by the commutation magnetic field so as to reduce a current density of the operating current on the trailing edge of said brush.