Abstract: A method of fabricating a coil for mounting on a tooth of a stator or a rotor of an electric machine includes winding a wire about a mandrel to form a coil having a first shape corresponding to the shape of the mandrel. The method may also include removing the coil having the first shape from the mandrel, and applying a mechanical force on the coil to change the shape of the coil from the first shape to a second shape. The second shape may correspond to the shape of the tooth. The method may also include mounting the coil of the second shape on the tooth.

Abstract: A radial flux electric machine includes a rotor configured to rotate about an axis of rotation, a plurality of electromagnetic coils, and a stator. The stator may have an annular stator ring and a plurality of core tooth-portions extending in a radial direction. The annular stator ring and the plurality of core tooth-portions may be integrally formed of a Soft Magnetic Composite (SMC). The SMC may include one or more isotropic ferromagnetic materials, a magnetic saturation induction of greater than or equal to about 1.6 Tesla, and an electrical resistivity greater than 10 micro-ohm/m.

Abstract: A radial flux electric machine includes a rotor configured to rotate about an axis of rotation, a plurality of electromagnetic coils, and a stator. The stator may include an annular stator ring extending about the axis of rotation and a plurality of multi-part teeth circumferentially arranged on the stator ring. Each multi-part tooth of the plurality of multi-part teeth may include a core tooth-portion integrally formed with the stator ring and at least one additional tooth-portion separate from the stator ring. Each coil of the plurality of electromagnetic coils may be mounted on a different multi-part tooth of the plurality of multi-part teeth such that each coil surrounds a corresponding core tooth-portion of the multi-part tooth with a gap between the coil and the core tooth-portion. The at least one additional tooth-portion may be disposed in the gap.

Abstract: An electromagnetic unit configured for being employed in a stator of an electric machine. The electromagnetic unit is constituted by a unitary solid body, and comprises a neck portion constituted by two end extensions sufficiently spaced apart for receiving therein a portion of a driven component of the electrical machine. The end extensions define therebetween a symmetry axis. The electromagnetic unit further comprises a frame extending from the end extensions and lying on the same or parallel plane as that of the end extensions. The frame has a first frame portion extending to one side of the symmetry axis to an extent W1, and a second frame portion extending to the other side of the symmetry axis to an extent W2<W1. W1, W2 are measured perpendicular to the symmetry axis, and wherein at least the first frame portion is configured for receiving therein a coil of the electrical machine.

Abstract: An electrical machine including a stator and a rotor rotatable relative to the stator with an air gap therebetween. The stator includes a first plurality of sources of magnetic field, which is equally spaced in a circumferential configuration over the stator. The rotor includes a second plurality of sources of magnetic field, which is equally spaced in a circumferential configuration over the rotor. The magnetic sources of at least one plurality are electromagnets and electromagnet includes at least one magnet coil resting on a magnet conductor. The magnetic conductor includes at least one member made of magnetically isotropic and/or anisotropic materials.

Abstract: An electromagnetic unit configured for being employed in a stator of an electric machine. The electromagnetic unit is constituted by a unitary solid body, and comprises a neck portion constituted by two end extensions sufficiently spaced apart for receiving therein a portion of a driven component of the electrical machine. The end extensions define therebetween a symmetry axis. The electromagnetic unit further comprises a frame extending from the end extensions and lying on the same or parallel plane as that of the end extensions. The frame has a first frame portion extending to one side of the symmetry axis to an extent W1, and a second frame portion extending to the other side of the symmetry axis to an extent W2<W1. W1, W2 are measured perpendicular to the symmetry axis, and wherein at least the first frame portion is configured for receiving therein a coil of the electrical machine.

Abstract: An electrical machine comprising a stator and a rotor rotatable relative to the stator with an air gap therebetween is disclosed. The stator is provided with a first plurality of sources of magnetic field which is equally spaced in a circumferential configuration over the stator. The rotor is provided with a second plurality of sources of magnetic field which is equally spaced in a circumferential configuration over the rotor. The magnetic sources of at least one plurality are electromagnets; each electromagnet comprises at least one magnet coil resting on a magnet conductor. The magnetic conductor comprises at least one member made of magnetically isotropic and/or anisotropic materials.