摘要:
The invention relates to a system for supplying electric power (10) to electrical equipment via a high-performance battery (2) comprising at least one device (LPF) for limiting a current of the high-performance battery. The high-performance battery has a first nominal voltage greater than that of a standard battery initially provided for supplying the equipment, which include an internal combustion engine starter (8) that is connected to the high-performance battery via the limiting device. According to the invention, the limiting device (LPF) is a transformer having a secondary winding circuit (R, W2) formed by a short-circuited secondary winding (W2). According to another feature, the coupling coefficient of the transformer and a secondary resistance of the secondary winding circuit are dependent on the specific characteristics of the equipment.
摘要:
The electromagnetic actuator for a heat engine starter comprises at least one winding (24; 25) for creating a magnetic field and a magnetic circuit cooperating with the winding in order to cause a magnetic flux to circulate therein, the magnetic circuit comprising a yoke (322, 323) and a mobile core (321) that can be moved from an initial position to an end position. The magnetic field of the winding creates a magnetic force that acts on the mobile core in order to move it from the initial position to the end position. The magnetic circuit is arranged so that the derivative of the magnetic permeance of same relative to the position of the mobile core on the journey of same from the initial position to the end position, reaches the maximum value thereof before the mobile core reaches the end position of same. This means that the magnetic force is maximised before the end position, which limits the size of the shock
摘要:
L'invention porte principalement sur un induit (11) de machine électrique tournante destinée à être utilisée dans un véhicule automobile comprenant: un corps (10) réalisé dans un matériau ferromagnétique comprenant: une culasse(24), et des dents (21) comprenant chacune une surface (27) destinée à venir en contact avec un entrefer de ladite machine, ladite surface (27) ayant une longueur axiale (L1) supérieure à une longueur axiale (L2) de ladite culasse (24). L'extrémité axiale des dents peut être réalisée dans un matériau magnétique composite.
摘要:
The invention relates to a machine having a wound rotor (102) comprising a manifold (112) that includes a set of blades (131) and longitudinal notches (133). Said rotor (102) also comprises a winding (108) formed of a set of conductors (134) that each comprise two arms (135.1, 135.2), connected together by a base (136). In accordance with the invention, the curve, representing the electromotive force (EMF) generated by the rotor (102) on the basis of the angle of rotation of the rotor, is linear and steep in a switching region, and the notches (133) are angularly shifted relative to the blades (131) so that each notch (133) is located opposite a junction between two blades. The invention also relates to the related starter fitted with said machine.
摘要:
The invention relates to a direct-current electric rotary machine, in particular a starter (1) for an automobile, wherein said machine comprises: a magnetised structure including at least a first type of sector (41; 42) having a magnetisation vector defining, with a radial direction, an angle that varies when moving along a circumference of the magnetised structure, the magnetisation in that sector having, at least locally, a direction different from the radial (F1) and orthoradial (F2) directions of the stator, the magnetic induction field in the air gap associated with this sector of the magnetised structure and the magnetic reaction of the rotor armature having normal components of opposite signs, the magnetic induction field generated by this sector of the magnetised structure being selected so as to have a profile bringing in an induction contribution by concentration of the magnetic flow at the locations where the effects of the armature magnetic reaction are opposed to those of the magnetised structure in order to at least attenuate locally an adverse effect of the armature magnetic reaction, wherein the magnetised structure includes at least one sector (43; 44) of a second type having a magnetisation vector defining, with the stator radial direction, a substantially constant angle when moving along a circumference of the magnetised structure, the magnetic induction field in the air gap associated with this sector of the magnetised structure and the armature magnetic reaction having normal components of the same sign.
摘要:
The invention relates mainly to an electromagnetic power contactor, especially for an electric motor of a starter of an internal combustion engine, comprising at least one coil (16b), said coil (16b) being formed by a conductive wire (37b) wound around a coil body, said conductive wire (37b) of said coil comprising a core (40) made from a conductive material, and a layer of electrically insulating varnish (41), said wire (37b) being covered with a layer of lubricant.