Abstract: A laminated core of a rotary electric machine having: a first spiral core constituent body layer configured by linking a plurality of metal first core constituent pieces that have a magnet mounting part, the first spiral core constituent body layer being wound in a spiral shape as an integral body; and a second spiral core constituent body layer configured by linking the plurality of first core constituent pieces and a metal second core constituent piece that has a magnet mounting part, the second core constituent piece having a different longitudinal-direction length than do the first core constituent pieces, and the second spiral core constituent body layer being wound in a spiral shape as an integral body. The second spiral core constituent body layer is laminated on the first spiral core constituent body layer in continuation with the first spiral core constituent body layer.

Abstract: A stator (300) for an electric machine, having a yoke ring (310), and a plurality of teeth (220) arranged side by side within the yoke ring (310) in the circumferential direction, wherein each tooth (220) has a yoke portion (222), wherein the yoke portions (222) of the teeth (220) support one another in the circumferential direction, wherein respectively at least a part of the outer circumference of the yoke portion (222) of each tooth (220) deviates from a circle segment shape that is concentric to a central axis (302) of the stator (300), and the outer circumference encloses at each point an angle of more than 45° with the radius (304) defined by the central axis (302).

Abstract: A rotary electric machine, e.g., a cycloidal reluctance motor, includes a stator having stator teeth connected to a cylindrical stator core, and a rotor having a cylindrical rotor core. The stator core and/or rotor core are constructed of grain-oriented, spirally-wound ferrous material having a circular or annular grain orientation. The stator teeth may be constructed of grain-oriented steel having a linear grain orientation. Notches may be spaced around an inner circumferential surface of the stator core, with each stator tooth engaged with a respective notch. The rotor may be eccentrically positioned radially within the stator. The rotor core may define notches spaced around its outer circumferential surface, with salient rotor projections engaged with a respective rotor notch. The machine in such an embodiment may be a switched reluctance rotor. An electrical system using the machine and a method of manufacturing the machine are also disclosed.

Abstract: An electric motor with a stator that is formed of a plurality of laminations. Each of the laminations has a radially inner lamination edge, which borders a rotor aperture configured to receive a rotor therein, and a radially outer lamination edge. Each of the laminations has a plurality of cooling apertures formed there through. The cooling apertures formed in a given one of the laminations are disposed radially between the radially outer lamination edge and the radially inner lamination edge. Each of the laminations is sealingly coupled to at least one other lamination. Each cooling aperture in a lamination forms part of a distinct cooling channel that extends along an axial length of the stator. At least a portion of the cooling apertures in each of the cooling channels are staggered circumferentially about a motor axis of the electric motor.

Abstract: A stator core of a rotating electric machine, includes a base, teeth, slots, and cutouts. The base includes a through-hole having a substantially cylindrical shape surrounded by an inner circumferential wall around a center axis of the substantially cylindrical shape. Teeth are arranged around the center axis and extending along a radial direction of the substantially cylindrical shape from the inner circumferential wall toward the center axis. Each of the teeth has a first end surface and a second end surface opposite to the first end surface in the center axis. Each of the slots is defined between a tooth and another tooth adjacent to the tooth among the teeth such that a coil is to be provided into each of the slots. Each of the cutouts is provided in the first end surface to face an inner surface of a bent portion of the coil.

Abstract: A rotor of a rotating motor includes a boss into which a shaft is inserted, a rotor yoke provided on a side of an outer circumference of the boss and formed of a plurality of pole pieces connected into a circular ring shape, and a coupling member made of resin with which the boss and the rotor yoke are integrally molded. Each of the plurality of pole pieces is provided with an injection hole that is bored in an axial direction and into which the resin is injected in the integral molding.

Abstract: A method for manufacturing a resin molded stator may include: preparing a straight winding core in which neighboring partial core backs are coupled by a joint; bending the core at joints and causing distal ends of teeth to face an outer peripheral surface of a core metal to obtain a core metal assembly including a stator mounted on the core metal, arranging the core metal assembly in a mold; injecting resin into the mold, covering windings with resin, curing the resin; and removing the stator from the mold and the core metal. The core metal may include a plurality of ribs projecting outward from the outer peripheral surface, the number of the ribs being between three and the number of the teeth. Each rib may extend parallel to a center axis, and each rib may be located in a gap between the distal ends of adjacent teeth.

Abstract: An electric motor according to the present invention includes stator (10) which has ring-shaped yoke (11) and a plurality of teeth (12) disposed at the inner peripheral part of yoke (11). Yoke (11) and teeth (12) configure slots (13) in which windings (15) are wound via electric insulator (14). Moreover, the motor includes rotor (20) that is rotatably held and faces the inner periphery of stator (10) via a slight gap. The rotor includes rotor iron core (21) having permanent magnets (22) that are disposed in the inside or on the surface of the core. Furthermore, a plurality of yoke recesses (16) is disposed only in the yoke (11) parts of slots (13).

Abstract: A stator of an electric motor and a washing apparatus having the same are disclosed. The stator includes a stator core, which has a plurality of bases stacked one above another after being wound, each base having a plurality of poles formed at one side surface thereof and a plurality of notches formed at the other side surface thereof. Each base is divided into at least two parts to be assembled with one another.

Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.

Abstract: The present invention relates to a stator core of a motor for a washing machine that is formed by connecting a plurality of arc-shaped core pieces to each other, each of the core pieces being formed by stacking core piece steel plates on top of each other and by bending the stacked core piece steel plates in such a manner that core piece teeth are disposed outward in the radial direction of a core piece yoke and the core piece yoke has the same curvature as a yoke of a stator core, the core piece yoke on each core piece steel plate having a plurality of incised portions for bending formed partially incised thereon between the respective neighboring core piece teeth on the opposite side to the side on which the core piece teeth are formed.

Abstract: A laminated core 10 improves material yield and prevents cracks or breakages of core pieces by relaxing stress on connecting portions 13. A connected core segment 14 to be the laminated core 10 includes: a V-shaped cutout 17 located radially inward from the connecting portion 13, the cutout 17 opening in a radially inward direction with an opening angle of 360°/n given that n is a number of core segments 19; a slit 18 located radially outward from the connecting portion 13, the slit 18 dividing adjacent segment yokes 12 located radially outward from the connecting portion; a first through-hole 20 having a circular arc formed in a radially outward end of the cutout 17 in contact with the connecting portion 13; and a second through-hole 21 having a circular arc formed in a radially inward end of the slit 18 in contact with the connecting portion 13.

Abstract: In a lamination core, a punched material strip is wound to provide layers of the core. The material strip comprises a plurality of semi-circle individual strip segments linked by hinge-like carrying webs between adjacent split lines at adjacent ends of the respective adjacent strip segments. Each strip segment has a plurality of teeth defining slots. A segment arc angle of the segment is not equally divisible into 360° and a slot arc angle of the slots is equally divisible into the segment arc angle, so that mated lines of one winding defined by respective adjacent split lines of adjacent are laterally offset with respect to mated lines defined by respective adjacent split lines of an adjacent winding.

Abstract: An electric motor comprises a stator and a rotor rotatably mounted confronting the stator. The rotor has a rotor core which comprises at least a first tooth, a second tooth and a third tooth which are adjacent. Each of the teeth comprises a rib section radially and outwardly extending from a core and a tooth section located at an outer end of the rib section. The angle between the first tooth and the second tooth is n degrees, wherein when the rotor core is rotated n degrees to move the first tooth towards the second tooth, the rotated second tooth does not coincide with the pre-rotated third tooth.

Abstract: An apparatus and method for the production of relatively large diameter annular components, such as stator cores for electric motors, without excessive waste of material. In one embodiment, a first progressive die assembly forms a plurality of identical pole pieces each made of a plurality of individual stacked and interlocked laminations. The pole pieces, having protruding end portions, are loaded into a rotary carousel. A second progressive die assembly forms a continuous strip including a plurality of body segments connected via hinge portions disposed adjacent recesses between the body segments that are dimensioned to receive the protruding ends of the pole pieces.

Abstract: A laminated core 10 including a plurality of segment core sheets 13 spirally wound and laminated in layers while connecting portions 12 connecting the adjacent segment core sheets 13 are bent, ends of the segment core sheets 13 are aligned with each other and the connecting portions 12 in the adjacent layers are circumferentially displaced relative to each other, the connecting portions 12 located in outer peripheral areas 11 of the segment core sheets 13, the laminated core 10 comprising: a concave cutout 22 formed on a radially outward side of the connecting portion 12, the concave cutout 22 accommodating a radially expanded part 21 within an outer circle of the laminated core 10, the radially expanded part 21 formed in the connecting portion 12 radially outward at the bending of the connecting portion 12; an interior cutout 23 formed on a radially inward side of the connecting portion 12, the interior cutout 23 defining a bent position of the connecting portion 12; and depressed receptacles 16, 17 resp

Abstract: A rotating electrical machine according to an aspect of the embodiment includes a rotor and a stator that surrounds the rotor. The stator includes: a yoke core that is obtained by bending in a circular shape plural band-shaped steel sheets that are punched out from a non-directional magnetic steel sheet and by stacking the punched-out band-shaped steel sheets; and plural teeth cores that are arranged in a peripheral direction of the yoke core, with one ends of the teeth cores fixed to an internal peripheral side of the yoke core, and with the other ends of the teeth cores set opposite to the rotor. The teeth cores are configured by stacking teeth steel sheets that are punched out from a directional magnetic steel sheet, and the teeth cores are independent of each other.

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: A stator of an outer rotor type motor is provided. The stator may include a helical core having stacked layers formed by winding a single metal sheet having a predetermined shape in a helical direction, a base and teeth that protrude from the base. The stator may also include an insulator made of electrical insulation material that surrounds the helical core, recesses formed in the base of the helical core that reduce stress due to the winding of the single metal sheet and disposed under the teeth, and auxiliary recesses formed in a bottom of the recesses.

Abstract: A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle

Abstract: A stamping step of forming a plurality of band-shaped core sheets (11), (12) having arc-shaped segment core sheets (15), (15a), the adjacent segment core sheets (15), (15a) connected together by narrow-width connecting portions (16), (16a) provided therebetween, the segment core sheets (15), (15a) having a plurality of pole sections (13), (14), (13a), (14a) protruding radially outward; and an annular shape forming step of winding the plurality of band-shaped core sheets (11), (12) in a spiral form while bending the band-shaped core sheets (11), (12) at the connecting portions (16), (16a) and superimposing the pole sections (13), (14), (13a), (14a) vertically one on another, thereby laminating the band-shaped core sheets (11), (12); wherein in the stamping step, notches (23a), (23) to be positioned in correspondence with the connecting portions (16), (16a) bent in the annular shape forming step are formed at radially outward sides of joining portions (22a), (22), the joining portions joining the adjacent pole

Abstract: A stator core is disclosed. The stator core is constructed in a structure in which stress and spring back of the stator core are minimized when a stator is manufactured in a spiral fashion, whereby workability is improved. The stator core includes a yoke formed in the shape of a band, a plurality of teeth protruding outward from one side of the yoke, the teeth being arranged at predetermined intervals in the longitudinal direction of the yoke, a plurality of notches formed at the inside of the yoke in the shape of a cutout such that the notches are arranged at equal intervals, and guide holes formed in the longitudinal direction of the yoke. The guide holes include holes formed at positions corresponding to the respective teeth and holes formed between the respective teeth.

Abstract: A laminated core (10) and a method for manufacturing the same, the laminated core (10) formed with a plurality of continuous segment core sheets (13) wound and laminated in a spiral form while connecting portions (12) mutually connecting the adjacent segment core sheets (13) are bent and side edges of the adjacent segment core sheets (13) are fitted with each other, the connecting portions (12) being located in an outer peripheral portion (11) of the laminated core (10), the laminated core (10) comprising: a concave cutout (19) provided at a radially outward side of the connecting portion (12), the concave cutout (19) allowing a radial bulge (18) to be accommodated within an outer circle of the laminated core (19), the radial bulge (18) formed at a radially outward side of the connecting portion (12) by bending the connecting portion (12); and an inward cutout (20) provided at a radially inward side of the connecting portion (12), the inward cutout (20) defining a bending position of the connecting portion (1

Abstract: A laminated spiral core includes core units and a plurality of swage portions. The core units form a rotor core. The core units have permanent-magnet attachment portions in which permanent magnets are to be disposed. Each of the core units has an arc shape. The plurality of swage portions connect the core units by swage-joining when the core units are spirally stacked in a predetermined number of layers. The plurality of swage portions are provided in the core units in a wave-shape to face the permanent-magnet attachment portions and provided at positions where an influence of magnetic flux paths in a rotor is minimal.

Abstract: A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle

Abstract: A laminated core (10) and a method for manufacturing the same, the laminated core (10) formed with a plurality of continuous segment core sheets (13) wound and laminated in a spiral form while connecting portions (12) mutually connecting the adjacent segment core sheets (13) are bent and side edges of the adjacent segment core sheets (13) are fitted with each other, the connecting portions (12) being located in an outer peripheral portion (11) of the laminated core (10), the laminated core (10) comprising: a concave cutout (19) provided at a radially outward side of the connecting portion (12), the concave cutout (19) allowing a radial bulge (18) to be accommodated within an outer circle of the laminated core (19), the radial bulge (18) formed at a radially outward side of the connecting portion (12) by bending the connecting portion (12); and an inward cutout (20) provided at a radially inward side of the connecting portion (12), the inward cutout (20) defining a bending position of the connecting portion (

Abstract: A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle

Abstract: A laminated core 10 including a plurality of segment core sheets 13 spirally wound and laminated in layers while connecting portions 12 connecting the adjacent segment core sheets 13 are bent, ends of the segment core sheets 13 are aligned with each other and the connecting portions 12 in the adjacent layers are circumferentially displaced relative to each other, the connecting portions 12 located in outer peripheral areas 11 of the segment core sheets 13, the laminated core 10 comprising: a concave cutout 22 formed on a radially outward side of the connecting portion 12, the concave cutout 22 accommodating a radially expanded part 21 within an outer circle of the laminated core 10, the radially expanded part 21 formed in the connecting portion 12 radially outward at the bending of the connecting portion 12; an interior cutout 23 formed on a radially inward side of the connecting portion 12, the interior cutout 23 defining a bent position of the connecting portion 12; and depressed receptacles 16, 17 resp

Abstract: A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle