Rotor for a rotary electrical machine

Rotor (10) of a rotary electrical machine comprising:

• a central shaft;
• an annular core which is coaxial to the shaft;
• a winding which extends radially around the core;
• a first claw-pole and a second claw-pole which are arranged axially on both sides of the core and the winding, each claw-pole comprising a plurality of teeth with a triangular form, wherein the base (c, c′) is tangent to the claw-pole, and comprising a first side (a, a′) and a second side (b, b′), such that each first side (a, a′) of the first claw-pole is opposite a second side (b, b′) of the second claw-pole at the inter-tooth space,
• the teeth of one of the first or the second claw-poles are such that the length of the first side (a, a′) is strictly longer than the length of the second side (b, b′);
• and
• the teeth of the other one of the first or second claw-poles are such that the length of the first side (a, a′) is strictly shorter than the length of the second side (b, b′).