A surface mounted permanent magnet motor includes a stator having poles and windings. A rotor includes magnets fixed to an outer surface of a support assembly. The stator poles face the outer surface of the rotor. The support assembly has magnetically conductive magnet carriers spaced from each other and supporting two magnets of opposing polarity. The magnet carriers have a central region of low permeability that blocks q-axis flux flowing from the stator radially towards the rotor axis surrounded by regions of high permeability. A first high permeability region defines a continuous flux path on the side of the barrier region closest to the rotor axis and links central regions of the two magnets carried by the magnet carriers. A second high permeability region is located on the side of the barrier nearest the stator that defines a flux path linking the end regions of the magnets.

A surface mounted permanent magnet motor includes a stator having poles and windings. A rotor includes magnets fixed to an outer surface of a support assembly. The stator poles face the outer surface of the rotor. The support assembly has magnetically conductive magnet carriers spaced from each other and supporting two magnets of opposing polarity. The magnet carriers have a central region of low permeability that blocks q-axis flux flowing from the stator radially towards the rotor axis surrounded by regions of high permeability. A first high permeability region defines a continuous flux path on the side of the barrier region closest to the rotor axis and links central regions of the two magnets carried by the magnet carriers. A second high permeability region is located on the side of the barrier nearest the stator that defines a flux path linking the end regions of the magnets.

A rotating electrical machine including a stator and a rotor having a rotor mass and permanent magnets, which are arranged on the surface of the rotor mass. The permanent magnets include a face which is directed towards the stator and is of a generally concave form. The permanent magnets of the rotor form poles of the rotor, in which the permanent magnet(s) of a same pole have an angular offset (a) between two longitudinal ends of the machine.

A rotating electrical machine including a stator and a rotor having a rotor mass and permanent magnets, which are arranged on the surface of the rotor mass. The permanent magnets include a face which is directed towards the stator and is of a generally concave form. The permanent magnets of the rotor form poles of the rotor, in which the permanent magnet(s) of a same pole have an angular offset (a) between two longitudinal ends of the machine.

A motor includes a stator having a winding, and a rotor. The rotor rotates by receiving a rotational magnetic field generated by drive current supplied to the winding. The winding includes a first winding and a second winding, the first and second windings both being excited at the same timing by the drive current. The first winding and the second winding are connected in series. The rotor includes a first pole section and a second pole section. The second pole section faces the second winding at the rotation position of the rotor at which the first pole section faces the first winding. The magnetic force exerted on the stator by the second pole section is weaker than that exerted by the first pole section.

A multi-pole rotor of a variable-flux memory motor (VFMM) includes: a plurality of poles. Each pole includes: a curved soft magnet, wherein an outer periphery of the curved soft magnet is toward the rotational axis of the rotor; a first non-magnetic and non-conductive material disposed on the outer periphery of the curved soft magnet; and a second non-magnetic and non-conductive material disposed on an inner periphery of the curved soft magnet.

A number of illustrative variations may include a rotor core for an electric motor comprising permanent magnets wherein the rotor core comprises lobes of the core material that magnets may be attached to.

The present invention may provide a motor including a shaft, a rotor coupled to the shaft, and a stator disposed to correspond to the rotor, wherein the stator includes a yoke and a tooth protruding from the yoke, the tooth includes a first surface, a plurality of second surfaces, and a plurality of third surfaces which are opposite to the rotor, the second surface is disposed between the first surface and the third surfaces to have predetermined gaps therebetween in a radial direction from the shaft, and a shortest distance from the shaft to the first surface is shorter than a shortest distance from the shaft to the third surface.

The invention relates to an electric machine (1) comprising a stator (10) and a rotor (20) separated from the stator (10) by way of an air gap, wherein the rotor (20) has a plurality of shell-like magnet segments (30) secured to a rotor body (22), and wherein the magnet segments (30) have in the circumferential direction in each case a plurality of sections (32, 33, 34) with different magnetic polarizations, which each form a magnetic pole of the rotor (20), and wherein transition zones (36) are formed between the sections (32, 33, 34) of the magnet segments (30) with different magnetic polarizations, wherein recesses (40) are provided in the magnet segments on the side facing the stator (10). It is proposed that the transition zones (36) are formed so as to run obliquely in the axial direction of the rotor (20) and that the transition zones (36) are formed in the region of the recesses (40).

The rotor includes a drive shaft, a first rotor core unit, and a second rotor core unit. The first rotor core unit is configured from a first iron core material having a through-hole into which the drive shaft is inserted, and a plurality of first permanent magnets, and includes a first reference surface at which the first iron core material is flush with or protruding further than first permanent magnets. The second rotor core unit is configured from a second iron core material having a through-hole into which the drive shaft is inserted, and a plurality of second permanent magnets, and has a second reference surface at which the second iron core material is flush with or protruding further than second permanent magnets, the second rotor core unit being laminated in an axial direction on the first rotor core unit such that the first reference surface and the second reference surface contact each other.