Patent ID: 7619343

Claim:
A rotor for an electrical motor, the rotor comprising: a core made of a magnetically conductive material, the core extending in an axial direction between substantially opposed first and second axial end faces, the core having a plurality of axially extending magnet cavities and conductor slots formed therein, at least the first axial end face having a plurality of magnet cavity openings formed therein, the magnet cavity openings permitting insertion of permanent magnets into the magnet cavities; a plurality of permanent magnets arranged in the magnet cavities; an end plate at least partially covering the first axial end face, the end plate securing the permanent magnets in the magnet cavities; and a squirrel cage including a plurality of conductors arranged in the conductor slots and first and second short circuit rings arranged on respective first and second axial end faces, the first short circuit ring including a substantially circumferential protrusion located radially inward of a remainder of the short circuit ring, the circumferential protrusion protruding axially away from the first axial end face, wherein at least a portion of the circumferential protrusion is deformed to define at least one deformed portion holding the end plate to the first axial end face, and wherein the at least one deformed portion can be formed at any point of the circumferential protrusion.