Electric motor having auxiliary portions distributed at a pitch which is an odd number sub-multiple of the pitch of active portions

Claim 1

An electric motor comprising an axis, a fixed part and a movable part rotatably mounted around said axis, wherein one of said parts comprises a winding including a number of coils distributed about said axis, each coil comprising two assemblies of active conductor portions spaced circumferentially at a given angular pitch, said motor further comprising feed control means connected to first and second poles of a constant-voltage current source for controlling commutations of connections between said active conductor portions and said poles at commutation angles corresponding to said angular pitch, wherein each coil comprises an odd number of pairs of auxiliary conductor portions electrically connected in series with the active conductor portions of the coil, each auxiliary conductor portion having an orientation relative to said axis similar to that of respective active conductor portions of the coil, said pairs of auxiliary conductors being distributed in each coil with an angular pitch which is the angular pitch of said active conductor portions divided by said odd number, said odd number being greater than one.