A rotor for a rotary electric machine and having: a plurality of permanent magnets, which are axially oriented and are arranged beside one another around a rotations axis so as to form a closed ring; a support cylinder, which has an outer surface, on which the permanent magnets rest, and a central cavity; and two half-shafts, which are independent of and separate from one another and are singularly inserted in opposite ends of the central cavity of the support cylinder so as to form one single block with the support cylinder. The permanent magnets are circumferentially arranged one following the other according to a Halbach array so as to nullify the magnetic field radially on the inside of the permanent magnets and so as to maximize the magnetic field radially on the outside of the permanent magnets.

An electric motor apparatus is described that utilizes a Halbach array and a ferrofluid core. The electric motor comprises a rotor assembly and a stator assembly, each of which utilizes a Halbach array. A ferrofluid core is utilized in the stator, which results in a motor that is less susceptible to core loss and operates with increased efficiency.

A system for a rotor with directional magnetic field configured for use in electric aircraft motor that includes a magnet array having an outer cylindrical surface, an inner cylindrical surface, an upper edge, and a lower edge, which further includes a plurality of magnets, where the plurality of magnets is configured to create a directional magnet field and an electrically insulating epoxy, where the electrically insulating epoxy envelops at least a portion of the plurality of magnets.

A rotor of a rotary electric machine includes a first magnet and a fourth magnet whose magnetic fields are oriented in radial directions of a stator, and a second magnet and a third magnet whose magnetic fields are oriented in circumferential directions of the stator. Teeth portions of the stator each include a base portion that protrudes in a radially inward direction of a yoke portion, a flange portion that is wider than the base portion, and an expanding portion interposed between the base portion and the flange portion. An angle of intersection between the base portion and the expanding portion is 108° to 130°. A distance (thickness) from an inner circumferential side end part to an outer circumferential side end part of the flange portion is 0.2 mm to 2.0 mm.

A rotor for an electric machine is disclosed herein. The rotor comprises: a central shaft; a rotor drum arranged radially outward of the central shaft, wherein the rotor drum comprises a hollow cylinder for carrying permanent magnets on an inner and/or outer surface of the hollow cylinder, and wherein the rotor drum is coaxial with both the central shaft and a rotational axis of the rotor; and a cap arranged to couple the central shaft to the rotor drum to enable the rotor drum and central shaft to rotate together about the rotational axis. An inner portion of the cap is coupled to the central shaft at a first position along the length of the rotational axis, and an outer portion of the cap is coupled to the rotor drum at a second position along the length of the rotational axis. The first position is at a different length along the rotational axis to the second position.

A rotor for an electric machine is disclosed herein. The rotor comprises: a central shaft; a rotor drum arranged radially outward of the central shaft, wherein the rotor drum comprises a hollow cylinder for carrying permanent magnets on an inner and/or outer surface of the hollow cylinder, and wherein the rotor drum is coaxial with both the central shaft and a rotational axis of the rotor; and a cap arranged to couple the central shaft to the rotor drum to enable the rotor drum and central shaft to rotate together about the rotational axis. An inner portion of the cap is coupled to the central shaft at a first position along the length of the rotational axis, and an outer portion of the cap is coupled to the rotor drum at a second position along the length of the rotational axis. The first position is at a different length along the rotational axis to the second position.

There is disclosed a motor (100) comprising: a stator (120), comprising a core (122) and a plurality of windings (124); and a rotor (140), comprising a plurality of permanent magnets (150, 152, 154), wherein a first portion of the magnets (150, 152) is disposed on two axial rotor portions (142, 144) in close proximity to two respective axial sides of the windings (124), and a second portion of the magnets (154) is disposed on a radial rotor portion (146) in close proximity to a radial side of the windings (124), and wherein energising the windings (124) causes a torque to be applied to the rotor (140) via said two axial rotor portions (144, 144) and said radial rotor portion (146).

The generator device of electrical energy with permanent magnets, particularly for the supply of electrical loads and/or batteries of vehicles, connectable to at least a driving shaft of a motor, comprises: a rotor element rotating around an axis of rotation; a stator element contained inside the rotor element, or containing the rotor element, and coaxial to the rotor element, the stator element having a plurality of stator slots; a plurality of stator windings of a conductive material arranged at each of the stator slots and connected to a power supply line; a plurality of permanent magnets having a first side associated with the rotor element and a second side facing the stator element; wherein the permanent magnets are associated with the rotor element in a configuration of the Halbach array type to define a magnetic coupling to the stator windings wherein the magnetic field flow at the second side of each of the permanent magnets is substantially greater than the flow of the magnetic field at the first side of each of the permanent magnets.

A rotary motor includes a stator having a coil, and a rotor placed apart from the stator and rotating around a rotation shaft, wherein the rotor has a rotor frame coupled to the rotation shaft, and a magnet placed on the rotor frame, when a direction from the magnet to the coil is a first direction, the magnet has a plurality of first magnets having anisotropy and magnetized at least in the first direction, and a second magnet having isotropy and placed on end surfaces of the first magnets at a positive side in the first direction.

A rotary motor includes a stator having a coil, and a rotor placed apart from the stator and rotating around a rotation shaft, wherein the rotor has a rotor frame coupled to the rotation shaft, and a magnet placed on the rotor frame, when a direction from the magnet to the coil is a first direction, the magnet has a plurality of first magnets having anisotropy and magnetized at least in the first direction, and a second magnet having isotropy and placed on end surfaces of the first magnets at a positive side in the first direction.