| 主权项 |
1. A coilless rotor for an electrical rotary machine, the rotor being configured to generate a rotor magnetic field for interaction with a stator magnetic field of a
stator of the electrical rotary machine, the rotor comprising: a first pole piece structure with at least two individually spaced rotor pole sections connected by a first integration bridge so as to form a single structure, wherein the rotor pole sections extend in axial direction of the rotor, wherein there is a distance between the rotor pole sections, and the rotor pole sections have a width smaller than the distance between the rotor pole sections; a second pole piece structure with at least two individually spaced rotor pole sections connected by a second integration bridge so as to form a single structure, wherein the rotor pole sections extend in axial direction of the rotor, wherein there is a distance between the rotor pole sections, and the rotor pole sections have a width smaller than the distance between the rotor pole sections; and permanent magnets, wherein said rotor is tubular, wherein the first and second pole piece structures are arranged such that distal ends of the rotor pole sections of the first pole piece structure axially extend beyond, while being circumferentially spaced apart from, distal ends of the rotor pole sections of the second pole piece structure so as to form slots between the rotor pole sections, wherein the first and second pole piece structures are arranged such that the first integration bridge is axially separated from the rotor pole sections of the second pole piece structure and such that the second integration bridge is axially separated from the rotor pole sections of the first pole piece structure, wherein the permanent magnets are arranged along circumference of the tubular rotor and magnetised in circumferential direction of said rotor so as to generate the rotor magnetic field, wherein at least one permanent magnet is arranged between said first and second pole piece structure, the axially extending rotor pole sections directing the rotor magnetic field generated by said permanent magnets in a radial direction, each permanent magnet having a first and second magnetic pole, wherein the rotor pole sections of the first pole piece structure are magnetically coupled to the first pole of respective ones of the permanent magnets, and the rotor pole sections of the second rotor pole piece structure are magnetically coupled to the second pole of respective ones of the permanent magnets. |
