Patent ID: 6847143

Claim:
A rotary electrical machine, comprising a stator (S), a rotor (R), an airgap (E) between the stator (S) and the rotor (R), and permanent magnets incorporated in at least one of the rotor and the stator, wherein the magnets constitute at least a first group of magnets containing rare earths and a second group consisting of ferrite magnets, wherein a plurality of sub-assemblies ( 720 , 721 - 731 , 730 , 732 - 800 , 810 . . . ) is provided, each sub-assembly combining at least one magnet of the first group with a magnet of the second group arranged in superimposed relationship in a generally radial direction and wherein, at least one of said magnets being disposed radially so as to generate an orthoradial magnetic flux, wherein a plurality of sub-assemblies of magnets ( 720 - 721 , 730 - 732 , 800 - 810 ) are provided inside the rotor, each sub-assembly combining at least one magnet of the first group with at least one magnet of the second group, at least one of the said magnets being oriented radially so as to generate an orthoradial magnetic flux, wherein each sub-assembly comprises a magnet containing rare earths ( 721 , 810 ) situated closer to the airgap (E) than the ferrite magnet, said magnet containing rare earth ( 721 , 820 ) arranged in superimposed relationship in a generally radial direction with a ferrite magnet ( 720 , 800 ).