Electrical motor for automobile power steering system.

摘要

The Electrical motor has a: - a casing (1); - a multi-polar magnetic field part, consisting of at least four poles, fixed to the internal wall of the casing (1); - a shaft (4) fitted inside the casing (1) so that it freely rotates. The motor has: - a rotor (20) fixed to the shaft (4) has a winding (19) placed in a number of slots (11) formed on the circumferential external surface of a core; - a commutator (6), comprising a number of segments (16), fixed at an end part of the shaft (4), and; - a number of brushes (8) in contact with the surface of the commutator (6). The number of slots (11) is a multiple of the number of pole pairs and not a multiple of the number of poles. The motor has an equalising system (22) which prevents circulation currents from passing through the brushes due to different induced electro-motive forces appearing between the circuits inside the circuits of the rotor (20).