Electric rotating machine with salient poles

摘要

A DC electric rotating machine, such as a starter of an automotive vehicle, includes a stator with salient poles having at least four poles distributed uniformly over the circumference of the stator, a rotor disposed inside the stator, a set of brushes adapted for the electric supply of the rotor, and at least two geometrically opposed salient poles. Each pole includes at least one substantially radial slot in a plane parallel to the axis of rotation of the rotor and preferably passes through the axis of the rotor. By minimizing the reaction fields of the armature, utilization of the magnetic material of the parts of the stator is balanced and a harmful armature reaction effect, which increases saturation of the polar parts of the inductor and which leads to reduction in the driving magnetic torque, is mitigated.

主权项

1. A DC electric rotating machine including:
a stator forming an inductor having at least four poles distributed uniformly over the circumference of the stator, at least two geometrically opposed poles of the at least four poles being salient poles, each of the salient poles comprising at least one slot, at least one pole of the at least two salient poles being a consecutive pole not having an inductive winding and comprising at least two slots; a rotor disposed inside the stator, the rotor comprising an armature winding formed by armature wires wound in notches; a set of brushes adapted for the electric supply of the armature winding of the rotor; and a magnet disposed in the at least one slot in each of the salient poles; the magnet being magnetized in a direction transverse to a direction of an inductive flux of the salient pole so as to be perpendicular to a radius of the electric machine and parallel to a direction of an armature flux; the at least one slot disposed in a middle of each of the salient poles and extending parallel to an axis of rotation of the rotor; the at least one of the at least two slots in the at least one consecutive pole not having a magnet.