Abstract: A stator core includes a core back having an annular shape around a central axis, teeth extending outward from the core back in a radial direction, and an inner peripheral surface located inside the core back in the radial direction and extending from an upper end to a lower end of the core back around the central axis. The core back includes a plastically deformable portion having an annular shape around the central axis and disposed below the core back in the axial direction. At least a portion of the plastically deformable portion has a different distance from the central axis than another portion of the core back.

Abstract: An axial gap motor includes a rotor and a stator disposed to be separated with a gap from the rotor in a direction parallel to a rotation axis of the rotor. The stator includes a bobbin housing a coil and a core provided on an inside of the bobbin and configured by a plurality of magnetic sections. A first magnetic section among the plurality of magnetic sections is in contact with an inner peripheral wall of, among side portions of the bobbin, a first side portion opposed to a side portion of a bobbin on one side adjacent to the bobbin. A second magnetic section among the plurality of magnetic sections is in contact with an inner peripheral wall of, among the side portions of the bobbin, a second side portion opposed to a side portion of a bobbin on the other side adjacent to the bobbin. A void portion is present between the first magnetic section and the second magnetic section.

Abstract: A stator core assembly for an axial flux electric motor for an automobile includes a cylindrical outer case that defines a central axis, first and second disk shaped insulate frames axially spaced from one another and positioned within the outer case, each of the first and second insulate frames including a circular outer ring, a circular inner ring and a plurality of radial spokes extending between the outer ring and the inner ring and spaced circumferentially about the central axis, and a plurality of segmented core sections extending axially between the first and second insulate frames spaced circumferentially around and supported by the first and second insulate frames, wherein, a radial spoke is positioned between each adjacent pair of segmented core sections, and at least one radial spoke extends across each axial end of each one of the plurality of segmented core sections.

Abstract: Disclosed is a motor or generator comprises a rotor and a stator, wherein the rotor has an axis of rotation and is configured to generate first magnetic flux parallel to the axis of rotation, the stator is configured to generate second magnetic flux parallel to the axis of rotation, and at least one of the rotor or the stator is configured to generate a magnetic flux profile that is non-uniformly distributed about the axis of rotation. Also disclosed is a method that involves arranging one or more magnetic flux producing windings of a stator non-uniformly about an axis of rotation of a rotor of an axial flux motor or generator.

Abstract: A homopolar multi-core energy conversion device is an apparatus that uses magnetic flux commutation instead of a combination of electrical current commutation and brushes. The apparatus includes a first discontinuous annular stator core, a second discontinuous annular stator core, and a rotor core. The first discontinuous annular stator core is configured to generate a circumferentially-segmented clockwise magnetic flux around the rotor core, while second discontinuous annular stator core is configured to generate a circumferentially-segmented counter-clockwise magnetic flux around the rotor core. The rotor core is configured to radially partition a traversing magnetic flux. The circumferentially-segmented clockwise magnetic flux, the circumferentially-segmented counter-clockwise magnetic flux, and the traversing magnetic flux interact with each other so that the apparatus can function either as a motor or as a generator.

Abstract: A coil former for an electric motor, in particular a high-speed surgical motor, in which a rotor is surrounded concentrically by the substantially hollow-cylindrical coil former, carries at least one stator winding. To ensure that as narrow an air gap as possible is permanently maintained between the coil former, which is preferably produced using an injection-molding method often with complex shaping, and a rotor, which runs in the coil former, the coil former is formed either by a non-conductive fully ceramic body, or is in the form of a composite body in which at least one dimension-stabilizing frame element is embedded by injection-molding with plastic in a plastic body which is preferably produced by injection molding.

Abstract: An electrical device includes an electromagnetic component configured to generate a magnetic flux. The electromagnetic component includes a soft magnetically-conductive material configured to pass magnetic flux therethrough along a flux path. The soft magnetically-conductive material includes at least one grain oriented portion having metal grains that are oriented parallel with respect to the magnetic flux.

Abstract: A rotor includes a first insulator coupled to a first rotor core, and a second insulator coupled to a second rotor core. The first rotor core may include first teeth protruding from a first outer circumferential surface thereof, and the second rotor core may include second teeth protruding from a second outer circumferential surface thereof. The first insulator may include a body configured to surround the first teeth. A first outer guide may be formed at an outside of the body with respect to a radial direction of the first rotor core, and the second insulator may include a body configured to surround the second teeth. A second outer guide may be formed at an outside of the body with respect to a radial direction of the second rotor core. The first teeth and the second teeth may be disposed at different positions with respect to a circumferential direction.

Abstract: An electric motor, and the electric motor includes a stator core provided on a stator, a plurality of teeth provided on the stator core, a coil wound body attached to the tooth, an inner flange portion provided at an inner diameter side of a bobbin, a first engagement portion provided at one end side in a width direction of the inner flange portion, and a second engagement portion provided at the other end side in the width direction of the inner flange portion, the first engagement portion being provided to be located at an outer side in a diameter direction than the second engagement portion of the adjacent coil wound body in a moving direction, the second engagement portion being provided to be located at an outer side in a diameter direction than the first engagement portion of the adjacent coil wound body in a moving direction.

Abstract: The invention relates to a stator tooth (8) for an electrical machine, the stator tooth being intended for holding an electrical wire winding (10). The tooth includes a central portion (24) formed with a contiguous assembly of precut magnetic metal sheets (24a). The metal sheets are secured to one another. The tooth is characterized in that the central portion (24) is enclosed between two longitudinal end portions (25) which are secured to the central portion (24) and each have a radial attachment bolt (11) passing therethrough. The longitudinal end portions (25) have a rounded outer shape (25a) for forming, on the ends of the tooth, a continuous contact surface for the electrical wire(s) wound onto the tooth.

Abstract: A stator for an electrical motor or generator and method for manufacturing such stator includes providing a plurality of teeth and joining the teeth with a yoke. An electrically conductive winding is applied around each of the teeth. The teeth and/or yoke may be made from a stack of low-loss magnetic material sheets. The teeth and/or yoke may be made by folding a stack of magnetic material sheets.

Abstract: An electric disk-armature motor includes at least one stator in the form of a disk, at least one rotor in the form of an armature disk which is mounted rotatably about an axis of rotation with respect to the stator and/or a motor housing. The rotor and the stator are oriented parallel to one another and are spaced apart from one another by a gap. An end side of the rotor, which end side faces the stator, has a multiplicity of permanent magnets polarized in the axial direction, which are arranged in the form of a ring around the axis of rotation. A north pole and a south pole faces the stator alternately in the tangential direction, and wherein the stator has a multiplicity of coil elements. An electric bicycle or pedelec comprises such a disk-armature motor.

Abstract: An electric motor is provided with a stator core (3) configured by laminating a required number of annular electromagnetic steel sheets (5) having a plurality of tooth portions (4) around each of which a coil winding is wound, on the inner periphery side, wherein circumferential widths (B) of the tooth portion (4) in the plurality of electromagnetic steel sheets (5) which are laminated on both end. sides of the stator core (3) become gradually narrow coward the respective end portion sides, and the coil winding is directly wound around the tooth portion (4) in which shoulder portions (7) on doth sides in a circumferential direction of the tooth portion (4) which is formed by lamination of the electromagnetic steel sheets (5) are shoulder portions (7) which smoothly change so as to narrow in width in a stepwise fashion toward the respective end portions.

Abstract: A method for building a magnetic core including laminations bound into packs for an electrical machine comprises steps of: stacking a group of laminations one on top of the other to build the core; binding into a pack the group building the core by locking members that axially compress the group with a predetermined clamping force; pre-compressing, before clamping the pack by the locking members, the group by a pre-compression press that is independent and separate from the locking members; measuring an axial length of the group while the group is being compressed by the pre-compression press; initially forming the group with a normally lacking number of laminations to initially have the measured length that is lower than or substantially equal to a desired length; and adding, after having completed pre-compression, an additional number of laminations to the group determined according to a difference between the desired and measured lengths.

Abstract: A rotor having a dividable core for an electric motor, and a production method thereof. A rotor has a generally annular supporting member; a plurality of shaft portions positioned on the supporting member in a circumferential direction at regular intervals, the shaft portions extending generally parallel to a rotation axis of the rotor; and a plurality of divided cores each having a hole portion which is fitted to each shaft portion. By annularly connecting the divided cores, a generally annular dividable core for the rotor is formed. Each divided core has connecting portions at both circumferential ends thereof, and each connecting portion is configured to be connected to a connecting portion of a neighboring divided core while the divided core is fitted to the shaft portion.

Abstract: A rotating electrical machine includes a rotor and a stator including an annular stator core formed by helically stacking a plurality of core pieces that are connected to each other by connecting portions, the rotor being disposed inside an inner periphery of the stator core. The connecting portions are linearly arranged along a stacking direction of the stator core so that grooves that extend in the stacking direction of the stator core are formed in an outer peripheral surface of the stator core at positions where the connecting portions are provided.

Abstract: There is provided a stator that suppresses degradation in insulating performance and pressure-resisting performance without an additional insulating member, that can shorten a work time, and improve winding efficiency of a wound wire and heat radiation performance. The stator 1 includes a yoke part 10 of an annular shape, tooth winding portions 21 that protrude inward from the yoke part 10 and around which an electric wire 30 is wound, and a tooth end portion 22 formed on an inward side of the tooth winding portion. The stator 1 is formed by stacking steel plates in a direction corresponding to a rotational axis of a motor.

Abstract: An electrical machine stator assembly comprises: an electroconductive coil arranged circumferentially with respect to the rotational axis; a plurality of pairs of side lamination assemblies arranged circumferentially with respect to the rotational axis; a plurality of pairs of switch lamination assemblies arranged circumferentially with respect to the rotational axis and positioned adjacent ends of side lamination assemblies proximal the rotor; and at least one tooth associated with each switch lamination assembly and proximal the rotor. Each switch lamination assembly comprises a first group of laminated materials aligned generally circumferentially and generally in a first direction with respect to the rotational axis, the first direction being one selected from the group consisting of the axial and radial directions with respect to the rotational axis.

Abstract: A rotor for use in an electrical motor which includes an anti-expansion ring centrally mounted on the rotor to restrict the extent rotor elements mounted on a rotatable shaft may expand outward due to centrifugal forces generated when the motor is operated. Such motors are suited for use in high rotational speed environments such as electrically controlled turbochargers.

Abstract: The present invention provides a rotating electrical machine including a rotor core that does not produce narrow areas in rotor slots even if circumferential ends of fan-shaped segment cores are displaced radially outwardly and circumferentially during operation. In the present invention, slots near circumferential ends of the fan-shaped segment cores are made larger than slots in circumferential intermediate portions of the segment cores. With such a configuration, even if the circumferential ends of the segment cores are displaced radially outwardly and circumferentially during operation, the circumferential ends of the segment cores forming the large slots do not protrude into the slots formed in the circumferential intermediate portions of axially adjacent segment cores, thereby preventing narrow areas from being produced in the rotor slots.

Abstract: Electrical output generating devices and driven electrical devices having tape wound core laminate rotor or stator elements. The tape wound core portions enhance magnetic flux and may be shaped and cut to receive magnet and/or flux conducting portions in corresponding stator or rotor portions of devices. The devices can include cooling features integral with the stator and/or rotor portions and superconducting elements. The tape wound core portions can be contained in housings and/or be impregnated with adhesive or other bonding so as to maintain shape and to protect the tape wound core portions during operation of the device. In some variations, the housings can include features for simplifying the adhesive/bonding process.

Abstract: An axial gap coreless motor includes a stator including a stator yoke having a surface and being composed of a plurality of laminated layers of silicon steel sheets secured together, a wiring substrate having a surface and being disposed on the stator yoke surface, and a plurality of coreless coils annularly disposed on the wiring substrate surface; and a rotor including a rotor magnet having a plurality of circumferentially arranged magnetic poles, wherein the rotor is rotated relative to the stator such that the rotor magnet axially confronts the coreless coil over an air gap.

Abstract: Disclosed is a stator of reciprocating motor comprising: a stator including two lamination assemblies formed accordingly as a plurality of lamination sheets are stacked as a cylindrical shape or a circular are shape; and a mover inserted into an air gap between said two lamination assemblies and linearly reciprocating. In the stator, the lamination sheets constituting the lamination assembly are thicker at an outer circumference side of the lamination assembly than at an inner circumference said thereof. According to this, a path of a flux applied to the lamination assembly is maximized thus to minimize a resistance of the flux.