Abstract: An outer rotor type brushless motor of the present invention comprises: a rotor portion having a rotor frame, a shaft, and a rotor magnet; a bearing housing; a stator portion facing the rotor magnet and having a stator core, a plurality of first salient pole portions extending toward the rotor magnet from the stator core, an insulation surrounding the first salient pole portion, and a winding around the first salient pole portion through the insulation; and a torque holding portion provided on an inner side of the outer circumference portion of the rotor frame and an outer circumference of the bearing housing, and having a plurality of second salient pole portions disposed coaxially with the stator core and extending toward the rotor magnet, where the first salient pole portions and the second salient pole portions are provided in different numbers.

Abstract: Permanent magnet synchronous machines (100) are described having good efficiency, as well as corresponding methods for making a stator (110) or stator teeth (114) for such machines. A method for fabricating a stator (110) for an axial flux permanent magnet synchronous machine is for example described comprising obtaining several sets of substantially identical laminates (302), and stacking the sets of substantially identical laminates (302) so that a subsequent laminate has a part overlapping (304) the previous laminate and a part not overlapping (306) the previous laminate. Alternatively, a method of manufacturing a stator (110) is described wherein the method comprises obtaining a set of laminates (302) connected to each other with a thin strip (402) of material and creating a stack by folding the laminates (302) along the thin strip (402) of material.

Abstract: A generator core that increases the amount of power generated by a generator is provided. A plurality of magnetic steel sheets including non-divided magnetic steel sheets and divided magnetic steel sheets are stacked on each other to form a plurality of divided cores. The divided magnetic steel sheets are disposed to form a gap portion that crosses a magnetic path in one magnetic steel sheet. Each gap portion is positioned and shaped such that magnetic resistances of magnetic pole portions of the plurality of divided cores are not different from each other.

Abstract: A laminated stator and a method for making a laminated stator of an electric motor. The method includes arranging a plurality of stator laminations into lamination stacks spaced axially from one another, each lamination stack including a first group of stator laminations including an annular portion and a plurality of tooth portions extending from a periphery of the annular portion, and a second group of stator laminations including only tooth portions positioned to correspond with the tooth portions of said first group. The method further includes winding stator windings around selected subsets of the plurality of teeth while the lamination stacks are spaced axially and meshing the lamination stacks with one another so the annular portions of the lamination stacks are axially adjacent one another and the plurality of teeth are intermeshed with the plurality of another stack.

Abstract: A stator includes an annular stator core that is comprised of a plurality of stator core segments, an outer ring that is fitted on the radially outer surfaces of the stator core segments so as to fasten them together, and a stator coil mounted on the stator core. Each of the stator core segments is formed of a plurality of stator core sheets that are laminated in the axial direction of the stator core. Each of the stator core sheets has a reinforcement portion that includes a recess formed in one of the major surfaces of the stator core sheet and a protrusion formed on the other major surface. The stator core sheets are laminated so that for each adjoining pair of the stator core sheets, the protrusion of one of the stator core sheets is fitted in the recess of the other stator core sheet.

Abstract: A rotating electric machine includes a rotor configured to rotate about an axis. The rotor includes a rotor laminate stack having layered laminations pressed in an axial direction to form a composite, the rotor laminate stack being radially divided into an inner mechanical region and an outer electrical region. A rotor winding is disposed in the electrical region of the rotor laminate stack. A stator concentrically surrounds the rotor. A press plate is configured to press the layered laminations in the axial direction, the press plate being radially divided into a separate inner press plate and a separate outer press plate so as to correspond to the radial division of the rotor laminate stack.

Abstract: A rotating electrical machine includes a stator including a stator core and a rotor. The stator core includes an annular-shaped first stack core and an annular-shaped second stack core. The first stack core includes first core pieces and first couplers. The first core pieces are spirally stacked. The first couplers mutually couple the first core pieces. The second stack core includes second core pieces and second couplers. The second core pieces are spirally stacked. The second couplers mutually couple the second core pieces. An outside shape of the second stack core is larger than an outside shape of the first stack core in a radial direction. The first stack core and the second stack core are alternately arranged in a stack direction. The rotor is provided on an inner peripheral side of the first stack core and the second stack core.

Abstract: A stator includes an annular core back portion, a plurality of teeth extending radially outward from an outer circumference of the core back portion, and coils. A cylindrical portion of a housing includes a contact portion and a coming-off preventing portion arranged above the contact portion on an outer circumference of the cylindrical portion. The core back portion includes a small-diameter opening defining portion and a large-diameter opening defining portion arranged above the small-diameter opening defining portion. The cylindrical portion is arranged radially inward of the core back portion. The stator is held by the cylindrical portion with a lower surface of the core back portion arranged in contact with the contact portion and an upper surface of the small-diameter opening defining portion arranged in contact with the coming-off preventing portion. A bearing member is arranged radially inside the large-diameter opening defining portion and above the coming-off preventing portion.

Abstract: In an embedded magnet motor, radial magnets and first inclined magnets form north poles. The radial magnets and second inclined magnets form south poles. Core sheets each include preformed radial accommodating slots the number of which is expressed by P/2. Some of the preformed radial accommodating slots are short slots and the rest are long slots. The short slots are located at some parts of each radial accommodating slot along the axial direction. Radially inner ends of the short slots restrict the radial magnets from moving radially inward.

Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of laminated materials, for example laminated materials configured with cuts and/or segmentations. Segmentations may also assist with manufacturability, mechanical retention of components, and the like.

Abstract: The invention relates to a rotor for an electric motor, comprising a rotor shaft, a rotor core stack that is attached to the rotor shaft, a ring member which surrounds the rotor core stack, and a gap located between the rotor core stack and the ring member. Adhesive is introduced into the gap for fastening the ring member to the rotor core stack. Molded articles that are used as spacers are admixed to the adhesive.

Abstract: Electric machine rotor comprising: an inner rotor element and an outer rotor element positioned more outwards in the radial direction than the inner rotor element, the inner rotor element and the outer rotor element being made of a material of high permeance, and an air gap of low permeance between the inner rotor element and the outer rotor element. The outer rotor element forms a shape-mating pair with the inner rotor element, the inner rotor element and the outer rotor element being shaped in such a way that radial detachment of the outer rotor element from the inner rotor element is prevented.

Abstract: Stator for use in an electrical machine. A non-magnetic support frame section and a non-magnetic axial coil support are used to provide an air gap stator configuration. The present stators provide an air gap winding configuration that facilitates the fixing of stator coils in the air gap. The stator coils are located near the surface of the magnetic back iron and are separated from adjacent coils by non-magnetic structure.

Abstract: A first laminated body includes first and second laminated groups including respective convex parts alternately disposed. A second laminated body includes third and fourth laminated groups including respective concave parts alternately disposed. The convex part of the first laminated group is shaped to not be inserted into the concave part of the third laminated group and to be inserted into the concave part of the fourth laminated group, from a lamination horizontal direction. The convex part of the second laminated group is shaped to be inserted into the concave part of the third laminated group and the concave part of the fourth laminated group, from the lamination horizontal direction. The convex part of the first laminated group is press-inserted in the concave part of the third laminated group, and the convex part of the second laminated group is inserted in the concave part of the fourth laminated group.

Abstract: Disclosed herein is an inner rotor type permanent magnet excited transverse flux motor, in which a laminated structure in an axial direction or in a radial shape is applied to a stator iron core so as to employ a small amount of permanent magnets compared with a conventional outer rotor type permanent magnet excited transverse flux motor, thus providing high output power, increasing the efficiency of power generation, and reducing noise and vibration.

Abstract: A permanent magnet machine includes a rotor and a stator including plurality of stator pole sections. Each stator pole section comprises a core section having an inner end piece disposed adjacent to the core section, the inner end piece comprising a first magnetic material that is adapted to saturate during exposure to a first magnetic field strength, and an outer end piece disposed adjacent to the core section radially outwardly relative to the inner end piece, the outer end piece comprising a second magnetic material that is adapted to be unsaturated during exposure to the first magnetic field strength and to saturate during exposure to a second magnetic field strength, wherein the second magnetic field strength is greater than the first magnetic field strength.

Abstract: The stator of an electric rotating machine includes a stator core constituted of a plurality of core pieces joined to one another in a ring, a plurality of phase windings wound around the stator core, the stator core and the phase windings constituting a core assembly body, and an outer casing into which the core assembly body is fitted. Gaps are provided between an outer periphery of the core assembly body and an inner periphery of the outer casing.

Abstract: With a spindle motor, a stator core comprises a plurality of salient pole portions that are formed in a radial shape, are wound with a stator coil, and are disposed at a uniform angle except for a non-equiangular pitch region, a circular outer peripheral yoke formed so as to be continuous with the outer peripheral side of the salient pole portions, a cut-out which is formed by cutting out part of the outer peripheral yoke in an approximate sector-shape except in the non-equiangular pitch region of the salient pole portions, and a compensating pole plate which is provided in the cut-out along the ends on the inner peripheral side of the non-equiangular pitch region where the salient pole portions are formed.

Abstract: A synchronous reluctance motor comprises a stator and a rotor, the rotor comprising: a rotation shaft; a first core having a shaft hole for inserting the rotation shaft at a center thereof, and having a plurality of first flux barrier groups arranged along a circumferential direction of the shaft hole and spacing from each other; and a second core having a receiving hole larger than the shaft hole at a center thereof, and stacked at one side of the first core in an axial line direction. A length of the rotor protruding from a supporting portion can be decreased without reducing a stacked thickness thereof, and a vibration occurrence in a horizontal direction with respect to the rotation shaft can be reduced, thereby enhancing a reliability of the synchronous reluctance motor.

Abstract: In an embedded magnet motor, radial magnets and first inclined magnets form north poles. The radial magnets and second inclined magnets form south poles. Core sheets each include preformed radial accommodating slots the number of which is expressed by P/2. Some of the preformed radial accommodating slots are short slots and the rest are long slots. The short slots are located at some parts of each radial accommodating slot along the axial direction. Radially inner ends of the short slots restrict the radial magnets from moving radially inward.

Abstract: An armature core is formed by laminating a plurality of first magnetic plates along a lamination direction. The armature core includes a prism portion and a first rectangular solid portion. The prism portion has a length measured in a first direction perpendicular to the lamination direction and a height measured in a second direction perpendicular to the lamination direction and the first direction. The length of the prism portion gradually increases along the lamination direction in at least part of the prism portion. The first rectangular solid portion is adjacent to the prism portion in the second direction. The first rectangular solid portion has a uniform length measured along the first direction. Preferably, a plurality of the armature cores are mounted on a yoke and have armature windings wound to form an armature of a rotary electric machine of a compressor.

Abstract: In an embedded magnet motor, radial magnets and first inclined magnets form north poles. The radial magnets and second inclined magnets form south poles. Core sheets each include preformed radial accommodating slots the number of which is expressed by P/2. Some of the preformed radial accommodating slots are short slots and the rest are long slots. The short slots are located at some parts of each radial accommodating slot along the axial direction. Radially inner ends of the short slots restrict the radial magnets from moving radially inward.