Patent ID: 7876014

Claim:
A rotor of a generator or motor comprising: a rotor body adapted to axially rotate together with a rotor shaft; at least one set of N-polar and S-polar permanent magnet groups arranged along the circumferential direction of the rotor body at predetermined intervals; a plurality of magnetic flux-increasing elements arranged on the lines of magnetic force formed by the N-polar and S-polar permanent magnet groups around one side of the rotor body, wherein the plurality of magnetic flux-increasing elements are disposed between neighboring the N-polar and S-polar permanent magnet groups; and a middle magnet disposed between each of the N-polar permanent magnet groups and each of the S-polar permanent magnet groups and having N and S poles arranged to form the lines of magnetic force in a radial direction of the rotor body, wherein each of the N-polar and S-polar permanent magnet groups comprises a plurality of magnets arranged along the circumferential direction of the rotor, and the magnets arranged in the middle portion in the groups have a magnetic force stronger than the magnets arranged at both sides thereof, wherein the rotor body comprises division grooves formed along the outer circumference thereof to the N-polar permanent magnet groups to be spatially separated apart from the S-polar permanent magnet groups, wherein the plurality of magnetic flux-increasing elements and the middle magnet are disposed in the division grooves radially aligned.