Abstract: The invention relates to an electrical conductor for a stator of a rotary electric machine, in the form of a U-shaped hairpin, having: —first and second legs intended to extend axially in a first slot A and a second slot R, respectively, of the stator, —a bundle portion connected to the first and second legs of the electrical conductor in each case by an oblique portion, —the two oblique portions being in the form of a helical portion.

Abstract: Method for impregnating a stator of a rotary electric machine comprising slots, electrical conductors accommodated in the slots, at least two electrical conductors being electrically connected by an electrical connection, the method comprising the following steps: a) heating the stator to a first temperature; b) applying a resin close to the slots of the stator; c) heating the stator to a second temperature; d) applying the resin to the one or more electrical connections of the electrical conductors, application steps b) and d) being achieved through flow of the resin.

Abstract: Disclosed is a stator (2) comprising a stator body (25) having notches (21) formed between teeth (23), electrical conductors (22) being housed in the notches (21), at least one part of the electrical conductors being in the form of a U-shaped pin, each comprising first (22c) and second (22f) axially extending legs in the first (A) and second (R) notches, respectively, at least one of the first (22e) and second 22f) legs of the electrical conductors (22) extending out of the notches via an inclined welding portion, at least one part of the electrical conductors each having a welding portion, innermost with respect to the longitudinal axis of the stator, the innermost welding portions being inclined with the same inclination with respect to the plane perpendicular to the longitudinal axis of the stator.

Abstract: The invention relates to a method for welding a plurality of strands (33) of one or more electrical conductors (22), comprising at least the following steps: (a) preparing the strands (33) to be welded such that at least the free ends (22a) of adjacent strands are axially offset by a non-zero distance d. (b) melting the free ends (22a) of the strands thus arranged in order to weld them without addition of material.

Abstract: Stator (2) for a rotary electric machine (1), comprising a stator mass (25) comprising slots (21), electrical conductors (22) accommodated in the slots (21) forming a multiphase winding having at least a first phase (a) and a second phase (b), an input electrical conductor (A) of the first phase (a) being located in a first slot (slot number 1), one or more electrical conductors of the second phase (b) being located in a second slot (slot number 2), the second slot immediately following the first slot when going circumferentially around the axis of rotation of the machine, in the direction of flow of the electric current around the axis of rotation of the machine.

Abstract: The invention relates to equipment for producing coils of a stator of an electrical machine and a method for producing coils. The coil is formed by connecting arms (6) of conducting pins (4) inserted into the slots (3) of a magnetic circuit (2) of the stator (1). The equipment comprises a shaper (10) axisymmetric about an axis (5), and the shaper (10) is designed to be placed inside the free ends of the arms (6) and in contact with the magnetic circuit (2). A series of guide-pins (12) equal in number to the slots (3) is designed so that each penetrates into a hole of the shaper (10). Each hole is drilled along an axis. The axes of the holes (13) meet at a first point (14) on the axis of revolution (5) of the shaper (10). Each guide-pin (12) is designed to separate two arms (6) of pins (4) inserted into two adjacent slots (3) to guide the arms (6) in a fixed direction, distinct from the direction of the arms (6) in their slot (3).