Patent ID: 7692348

Claim:
An arrangement for fastening permanent magnets to rapidly rotating rotors of electric machines with a plurality of permanent magnets which are fastened to the outer circumference of a cylindrical, soft-magnetic rotor and are fastened to the rotor by wedge-shaped or claw-like profile parts which are arranged alternately therebetween, comprising: coaxially extending rotor grooves being introduced in the outer surface of the rotor; sides of the rotor grooves having contact surfaces which at least partially converge outward with respect to radial direction for contact surfaces of the profile parts which diverge in a conforming manner in order to hold the profile parts in a positive engagement against centrifugal forces; and said profile parts being formed of nonmagnetic material in such a way that they retain the permanent magnets pairwise in a claw-like manner in a positive engagement against centrifugal forces of the rotor rotation.