Apparatus (200) for use as a motor or generator, comprising: a first part (210); a second part (230) movable relative to the first part (210) and spaced from the first part (210) by an air gap (260); and a plurality of spaced activatable magnet elements (220) provided on the first part (210), each activatable magnet element (220) being operative when activated by application of an electric current thereto to direct a magnetic field across the air gap (260) towards the second part (230); wherein each activatable magnet element (220) comprises: a pole piece (222) defining an air-gap facing surface (223A, 223B), the pole piece (222) comprising: a first limb (224A); a second limb (224B); and a coil-winding section (224C) positioned between the first and second limbs (224A, 224B); a permanent magnet arrangement (225) provided between the first and second limbs 224A, 224B) of the pole piece; and an electrically conductive coil (226) wound around the coil-winding section (224C) of the pole piece, wherein the electrically conductive coil (226) is operative to generate a magnetic flux oriented to oppose the magnetic flux of the permanent magnet arrangement (225); characterised in that the pole piece (222) further comprises a parallel flux path section (224D) extending in parallel to the coil-winding section (224C) operative to allow magnetic flux from the permanent magnet arrangement (225) to flow in parallel to the coil-winding section (224C).

A magnetic geared rotary electric machine is provided with: a casing; a stator including a stator core, a coil, and a plurality of stator magnets; a first rotor including a plurality of pole pieces provided inside the stator; and a second rotor including a rotor core provided inside the first rotor and a plurality of rotor magnets provided in the rotor core, wherein the stator core includes a back yoke and a plurality of teeth protruding radially inward from the back yoke and provided at intervals in the circumferential direction, a plurality of the stator magnets are attached to radially inner end portions of the teeth in the circumferential direction, and the stator magnets are attached to the stator core so that a first portion of the tooth to which the stator magnets are attached is allowed to separate from a second portion of the stator core.

A stator for a wind turbine generator is provided, the stator including a first end plate and a second end plate spaced apart from each other in an axial direction of the wind turbine generator, and a reinforcement structure shaped as a plate and arranged between, and fixed to the first end plate and the second end plate, wherein the reinforcement structure is configured for coupling the first end plate and the second end plate, such that a force is transmissible between the first end plate and the second end plate.

Provide are a stator, a rotor, and a rotating electrical machine that reduce cogging or ripple due to a gap between core divided sections. The stator comprises a plurality of core divided sections each having a cutout part extending along an. axial direction, and a plurality of pins provided for each of the core divisions adjacent to each. other and press- fit into pin press-fit holes formed by the cutout parts facing each. other. The plurality of core divided. sections are divided from each other at division surfaces each consisting of four or more constituent surfaces extending along the axial direction, the constituent surfaces including the three surfaces of a first surface closest to a magnetic gap part, a second surface second closest to the magnetic gap part after the first surface, and a farthest surface farthest from. the magnetic gap part. A pin press-fit surface that is one of the constituent surfaces other than the first surface and the second surface and provided with the cutout part has a normal direction oriented in an out-of-plane direction of the first surface or an out-of-plane direction of the second surface.

A stator core assembly for an axial flux electric motor for an automobile includes a cylindrical outer case that defines a central axis, and a plurality of segmented core sections spaced circumferentially around the central axis within the outer case, each of the segmented core sections including a lamination stack and a sleeve, the lamination stack being positioned within the sleeve and the sleeve being formed from a soft magnetic composite material, the sleeve of each of the plurality of segmented core sections including a first axial end having a pole shoe formed thereon and a second axial end having a pole shoe formed thereon, the pole shoes formed on the first and second axial ends of the sleeve of each of the plurality of segmented core sections including a radially outward surface having an arcuate shape that corresponds to and contacts the radially inward surface of the outer case.

A stator arrangement for an electric engine having an inner rotor. The present invention furthermore relates to an electric engine for a charging device, in particular for an internal combustion engine or a fuel cell, having such a stator arrangement. The stator arrangement comprises an outer stator core with electrical windings, and a separate inner stator core, which is arranged inside the outer stator core and is designed to receive the rotor. The outer stator core defines a first inner diameter, which is dimensioned in such a way that a bearing unit of the electric engine can be guided through the outer stator core. An outer diameter of the inner stator core substantially corresponds to the first inner diameter, wherein the inner stator core is designed to extend a magnetic flux in the radial direction during operation. The invention furthermore relates to a method for producing the electric engine.

An axial flux electric motor for an automobile includes a stator assembly, and a rotor assembly, the rotor assembly including a plurality of lamination blocks arranged in an annular pattern, a plurality of conductive wedges, one conductive wedge being positioned between each adjacent pair of lamination blocks, the plurality of lamination blocks and the plurality of conductive wedges defining a rotor core disk having an inner diameter and outer diameter and opposing axial faces, and a plurality of permanent magnets attached to one of the opposing axial faces of the rotor core disk.

A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.

A flat-angled coil having a three-dimensional shape for maximizing a space factor according to the present invention comprises a unit coil comprising multiple layers which are provided to surround the peripheries of teeth of a core provided on an electric motor and laminated along the longitudinal direction of the teeth of the core so as to be integrally connected to each other continuously. The unit coil is formed such that at least a part of an adjacent portion thereof, which is adjacent to another unit coil provided in the same slot formed between the surrounded teeth of the core and the teeth of an adjacent core, is non-parallel with the side surfaces of the surrounded teeth of the core.

Rotor for an electric motor, having a rotor shaft and, mounted on the rotor shaft, a rotor core having a number of core laminations arranged along an axis of the rotor core. Each core lamination includes a central contoured aperture which is traversed by the rotor shaft and which includes at least two radially extending elevations and at least two cutouts positioned between the elevations, wherein, to form a press fit of the core laminations on the rotor shaft, a distance between the free ends of the elevations is less than a diameter of the rotor shaft, and wherein a duct extending peripherally on the rotor shaft is formed by the respective cutout in the successively arranged core laminations.