In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes a shaft comprising an outer diameter, a first hub coupled about the shaft outer diameter, and a first plurality of pole pieces positioned radially about the hub. The rotor further includes a plurality of permanent magnets positioned radially about the hub. The plurality of pole pieces and the plurality of permanent magnets define a rotor outer diameter, and the rotor outer diameter is magnetically isolated from shaft.

A method for mounting the drive train components of a hybrid drive including providing an automatic transmission, which comprises a transmission casing and a transmission input shaft; a hybrid head, which is premounted as a separate assembly and which has a hybrid head casing, a rotor drive element and an output element; and an electric machine, which has a stator and a rotor, wherein the hybrid head casing is connected by flanges to the transmission casing and the output element is coupled in rotation to the transmission input shaft by means of a shaft-hub connection, and wherein the electric machine is subsequently installed in the hybrid head casing, wherein the stator is connected to the hybrid head casing and the rotor is connected to the rotor drive element.

A rotatable transverse flux electrical machine (TFEM) comprising a stator portion and a rotor portion operatively disposed inside the stator portion is described therein, the rotor portion comprising a plurality of magnets and concentrators alternatively affixed in a cylindrical arrangement to a non-magnetic magnets-and-concentrators supporting frame, the non-magnetic magnets-and-concentrators supporting frame being operatively secured to an axial shaft concentrically aligned with a rotational axis of the rotor portion.

The method for removing a bar or coil from a slot of an electric machine includes weakening the bonding between the slot and the bar or coil, and then removing the bar or coil.

A rotor for an electrical machine, in particular synchronous reluctance machine, is provided. The rotor is formed as a cylindrical structure having a magnetically soft element formed with an even number of salient magnetic poles openings for forming magnetic flux barriers. The openings are at least partially filled with a diamagnetic and/or paramagnetic medium and the diamagnetic and/or paramagnetic medium may axially and tangentially fix the magnetically soft element relative to the rotor. A method for producing such a rotor and apparatus using the rotor, including a reluctance motor, in particular a synchronous reluctance motor, that uses the rotor are provided.

The brushless DC motor of the present invention comprises a permanent magnet rotor rotating coaxially with and inside of the stator containing the electric windings, separated by a radial, axially extending gap. The rotor can be formed of four or more permanent, e.g., ferrite ceramic magnets, spaced substantially equidistantly circumferentially around the rotor and extending radially along the axial length of the rotor. The preferred ferrite magnets are substantially corrosion resistant, and thus durable in the wet rotor environment, in which it may be used, sufficient to withstand the effects of even hot salt water. Preferably, four of the permanent magnets are bar magnets, i.e., rectangular in cross-section, extending radially and perpendicularly to the adjacent magnets. Most preferably, the bar magnets are separated by generally wedge-shaped, or quadrant-shaped, sections of magnetic material. The permanent magnets are polarized so that the north-south flux lines extend transversely to each adjacent magnet, most preferably forming a so-called Halbach Array. This brushless DC motor is especially useful for driving wet rotor pumps, wherein the particular combination of elements forming the rotor results in a highly efficient, effective and durable motor.

According to one disclosed method, a magnet segment may be slid linearly along a first surface and onto a second surface of a back iron of a rotor, wherein the first surface is disposed at or above a rim that extends upwardly from the second surface at an outer edge of the back iron to enable the magnet segment to slide over the rim before the magnet segment is slid onto the second surface. According to another disclosed method, a first end of a magnet segment may be pressed against an elastic member located at an inner portion of a back iron for a rotor so that force exerted by the elastic member pushes a second end of the magnet segment against a rim located at an outer portion of the back iron.

Provided is a motor including a stator and a rotor. The rotor includes a rotor core rotating integrally with an rotation shaft and having a core base end part fixed to the rotation shaft and core protrusions protruding outward in a radial direction from the core base end part; and a magnet disposed between the core protrusions adjacent to each other in a circumferential direction on an outer peripheral surface of the core base end part. A central position of the stator core in the axial direction, a central position of the rotor core in the axial direction, and a central position of the magnet in the axial direction are deviated from each other. The central position of the magnet in the axial direction is located between the central position of the stator core in the axial direction and the central position of the rotor core in the axial direction.

A rotor (1) with a rotation axis (2) is provided for an electric drive machine (3). The rotor (1) has a plurality of rotor assemblies (4), each of which has a plurality of laminated cores (5) and a number of magnets (7) corresponding to a pole pair arrangement (6). The rotor also has a rotor shaft (8) on which the rotor assemblies (4) are fixed. The rotor assemblies (4) are positioned on the rotor shaft (8) such that they are rectified in accordance with their axial runout (9), while taking into account the pole pair arrangement (6). The rotor can reduce a thermally induced change in imbalance.

A method for forming a concentric winding coil in which a coil end portion protruding from an axial end face of a stator core has a plurality of different nonlinear shapes, from a rectangular conductor wound in a predetermined number of turns, the method including forming the coil end portion into the plurality of different nonlinear shapes in one step by causing a die to make a stroke movement in a predetermined direction with respect to the rectangular conductor being set.