Abstract:
The invention mainly relates to a motor vehicle heat engine starter comprising a rotary electric machine (5) that has a rotor (9) and a stator (8) and comprises a plurality of magnetic poles (65) arranged on an internal circumference of a yoke (66). Each magnetic pole (65) is made up of a salient pole shoe (69) surrounded by a winding (70). Said starter is characterized in that an air gap (76), separating said rotor (9) from the magnetic poles (65) of said stator (8), varies according to the circumference thereof. The invention also relates to a corresponding pole shoe (69).