ROTOR FOR A ROTARY ELECTRIC MACHINE AND ROTARY ELECTRIC MACHINE COMPRISING SUCH A ROTOR

摘要

The invention relates to a rotor (1) comprising a plurality of alternating magnetic poles formed by permanent magnets (3) distributed regularly between a circumferential portion (5) and a central portion (6) of the magnetic body (2) of the rotor and defining circumferential pole sections (7). The circumferential portion comprises axial grooves (15) which are arranged between the pole sections facing the magnets and which form openings in recesses (4) containing the magnets. According to the invention, the openings have a pre-determined first width (a) such as to minimise a leakage magnetic flux (PhiL) flowing through the circumferential portion (5) and to maximise a useful magnetic flux (PhiU) flowing radially through each of the pole sections (7). The circumferential portion can have a pre-determined opening ratio such as to minimise the leakage flux (PhiL) and to maximise the useful flux (PhiU), said opening ratio being equal to a first ratio of the first width to a second width (w) of the magnets in a circumferential direction.