Stator which permits good wedge support whilst optimising the magnetic circuit, and method for electrical insulation of the said stator

Stator, in particular of a rotary electrical machine for a motor vehicle, constituted by a plurality of plates (1a, 1b, 1c, . . . , 1n) forming a set of plates (1) with a generally cylindrical form, said stator having a plurality of radial notches (2), each notch being delimited by two adjacent teeth (3) which extend radially, and are connected to one another by means of their proximal end (3A), their distal ends (3B) defining a cylindrical axial receptacle which can receive a rotor, and being provided with tooth roots (4) constituted by projecting portions extending in the direction of the inner cavity of the notches, such as to reduce the width of the notch at its inlet, the notches being provided in their interior with a notch base insulator (5) covering the inner wall of said notches on the useful filling periphery of the conductive wires (F), and the stator comprising a plurality of flat notch closure wedges (6), wherein each notch closure wedge is arranged inside a notch, at a non-zero distance from the lower end of the notch base insulator.