Rotor for an electric motor, rotor discs for construction of the rotor, and an electric motor having such a rotor

Annular rotor disc for, in an axially stacked disc assembly of a plurality of similar rotor discs, forming a rotor for an electric motor, in which the discs secure a plurality of axially running permanent bar magnets, of substantially rectangular cross-sectional shape, distributed around the circumference of the rotor, wherein the rotor disc has pockets of substantially corresponding cross-sectional shape for accommodating and securing the permanent bar magnets in such a way that adjoining bars form an angle to one another and to a radius of the rotor, and that at least a portion of one end edge of each bar magnet is exposed to the outer periphery of the disc assembly, wherein the pockets for adjacent, mutually diverging permanent bar magnets, viewed in the radial direction from the centre of the rotor, in each rotor disc delimit between them a substantially triangular disc part, which is flexibly connected to a radially inner part of the annular rotor disc only by a radially inner web portion.

Electric motor having a rotor, constructed of a plurality of axially stacked, annular rotor discs, for securing a plurality of axially running permanent bar magnets, of substantially rectangular cross-sectional shape, distributed around the circumference of the rotor, and a stator surrounding the rotor and having windings which are placed around teeth and are configured, when current is fed to the windings, to form electromagnets for acting upon the permanent magnets so as to generate a torque on an output shaft connected to the rotor, wherein the rotor discs have pockets of substantially corresponding cross-sectional shape for accommodating and securing the permanent bar magnets in such a way that adjoining bars form an angle to one another and to a radius of the rotor, and that at least a portion of one end edge of each bar is exposed to the outer periphery of the disc assembly, wherein the pockets for adjacent, mutually diverging permanent bar magnets, viewed in the radial direction from the centre of the rotor, in each rotor disc delimit between them a substantially triangular disc part, which is flexibly connected to a radially inner part of the annular rotor disc only by a radially inner web portion.