Conductor bar and associated rotor and rotating electrical machine

A conductor bar for a squirrel-cage rotor, comprising:

• at least one end which is partially slit such that a section of the end forms two symmetrical branches relative to the slit, the centre of gravity of each branch is disposed away from the slit such that the branches move apart in an outwards direction relative to the bar under the effect of centrifugal force when the rotor is rotated, wherein the bar is configured such that the peripheral surface of the bar deformed under the effect of centrifugal force comes into contact with the surface of a through-hole in a short-circuit disc of the rotor, thereby creating a contact surface therebetween that extends about an angle greater than 180°.