Electric motor brush
AssigneeBrose Fahrzeugteile GmbH & Co. KG
InventorsEric Fournier, Florence Campagne, Maurad Berkouk
Life of this patent
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Abstract
The present invention relates to a brush 10 suitable for coming into contact with conducting plates 12 provided on an electric motor commutator 11. According to the invention, the brush has a means 15 for adjusting its pole coverage between the start of life of the motor and its stabilized operation. This is therefore a brush with pole coverage that can be varied over its operating life. Such a brush is more particularly fitted into a motor for a ventilation (air conditioning) system for motor vehicle.
Claims5
A brush (10) adapted to come into contact with conductive plates (12) arranged on a commutator (11) of an electric motor, the brush comprising a polar covering control means (15) between the beginning of the motor lifespan and its condition of stabilized operation, the control means comprising at least one zone (15) formed with a limited width at a periphery of a contact zone (13) with the commutator plates (12), and the said formed zone being adapted to reduce the polar covering (a) of the brush to values lower than 360°/P, with P being the number of commutator plates, in the beginning of the motor lifespan, and to maintain a polar covering at values above 360°/P during a stabilized operational condition of the motor.
5-8. (canceled)
Dependencies are inferred from the claim text.