Abstract: The present invention may provide a motor including a rotor and a stator disposed to correspond to the rotor, wherein the rotor includes a first rotor core and a second rotor core stacked on each other in an axial direction, the first rotor core includes a first surface on which a magnet is disposed and a first hole which passes through the first rotor core in the axial direction, the second rotor core includes a second surface on which a magnet is disposed and a second hole which passes through the second rotor core in the axial direction, the first surface and the second surface are disposed to be misaligned with each other around a center in the axial direction, and the first hole and the second hole are disposed to be aligned with each other.

Abstract: A stator for an electric motor has a stator base body, which has stator teeth arranged in a star shape and a stator yoke, and on whose outer circumference a number of axial slots are provided, into which joining elements projecting radially from the circumference of the stator base body are radially inserted in a form-fitting manner.

Abstract: When a laminated core is formed in an annular shape, a radially inner part of a contact surface formed by a projecting end of a first core piece and a recessed end of another first core piece that are adjacent in a circumferential direction, and a radially inner part of a contact surface formed by a projecting end of a second core piece and a recessed end of another second core piece that are adjacent in the circumferential direction, are positioned in a plane including a center axis of the annular laminated core.

Abstract: A drive support unit of a turbo compressor includes at least one bearingless motor. The at least one bearingless motor includes a rotor-stator pair constituted by a rotor and a stator, and is configured to rotationally drive a drive shaft and to support a radial load of the drive shaft in a contactless manner. Accordingly, it is possible to provide a turbo compressor to which a bearingless motor is applied.

Abstract: Presented are oleophilic surface treatments for electric machines, methods for making/using such electric machines, and vehicles employing traction motors having stator windings with oleophilic treatments on select surfaces. An electric machine includes an outer housing with a direct-cooling thermal management system fluidly connected to the housing to circulate thereto a coolant fluid. A stator assembly, which is attached to the housing, includes a stator core with one or more electromagnetic windings mounted to the stator core. A rotor assembly is movably mounted to the hosing adjacent the stator assembly. The rotor assembly includes a rotor core with one or more magnets mounted to the rotor core spaced, e.g., across an air gap, from the winding(s). Select components of the stator assembly have a target surface with an oleophilic surface treatment that enlarges the target surface's wetted area and increases a coolant mass of the coolant fluid contacting the target surface.

Abstract: A vehicle electric machine includes a stator core having an inner diameter defining a plurality of slots, an outer diameter, and a plurality of mounting ears disposed radially outboard of the outer diameter. At least one of the mounting ears defines a cooling channel extending in an axial direction of the stator core. A radial distance between a center of the stator core and the cooling channel is greater than a radial distance between the center and the outer diameter. The machine further includes windings having portions disposed in the slots and end windings adjacent to an end face of the stator core.

Abstract: An electric motor includes a rotor having a rotor shaft part and a first shaft part and a second shaft part. The rotor shaft is situated axially between the first and the second shaft parts. The first shaft part includes a first bearing seat and is connected to the rotor shaft part in a torsionally fixed manner, and the second shaft part includes a second bearing seat and is connected to the rotor shaft part in a torsionally fixed manner.

Abstract: Provided is a method of manufacturing a stator or a rotor of an electrical machine, the steps of: modelling a plurality of model segments circumferentially joined together in such a way that two circumferentially adjacent model segments contacts each other at respective circumferential interfaces, the plurality of model segments including a plurality of model teeth interposed between a plurality of slots, manufacturing the segmented body in such a way that at least the two end slots are circumferentially shifted away from the circumferential interfaces of the respective model segment for creating respective gap portions of the circumferential gap, the sum of the circumferentially shifts of the at least two end slots being equal to the sum of the circumferential extensions of the gap portions, circumferentially joining the plurality of segments together in such a way that two gap portions of two adjacent segments forms the respective circumferential gap.

Abstract: In the rotary electric machine according to the present invention, a plurality of core sheets include linked core sheets that include linking portions that protrude circumferentially from flange portions so as to link together tip portions of adjacent tooth portions, at least one sheet of the linked core sheets is formed such that a tooth tip portion shape is mirror-asymmetrical relative to a tooth central axis that passes through a circumferential center of the tooth portions, and a stator core is configured by laminating the linked core sheets such that circumferential positions of the linking portions are offset.

Abstract: A motor includes: a stator that includes a teeth iron core and a yoke iron core; a rotor housed in the stator; an output-side flange; a projection disposed at the yoke iron core, the projection projecting on an output side of the motor with respect to an end surface of the teeth iron core; and a concave portion disposed at the output-side flange, the concave portion at which the projection is disposed, the concave portion contacting an inner peripheral surface of the projection.

Abstract: An electric motor includes a yoke having a cylindrical section, two pairs of permanent magnets disposed at an inner circumferential surface of the cylindrical section to oppose each other, and an armature rotatably supported further inside in a radial direction than the permanent magnets, wherein at least a pair of first flat sections opposing each other in the radial direction are formed at the cylindrical section, and the permanent magnets are disposed at positions distant from the first flat sections.

Abstract: The invention relates to an electric machine comprising a stator, this stator comprising a set (10) of magnetic laminations which is made up of at least one first subset (50) and of at least one second subset (60) adjacent to the first the laminations of the first and second subsets having parts which become superposed, each comprising at least one closed channel formed within the laminations, the laminations being identical but angularly offset from one another by an angle 360°/n about the axis of the machine, where n is a non-zero integer, the laminations being without symmetry in a rotation by 360°/n so that the parts of the laminations thus offset which become superposed are nonidentical and create the said perturbation in the flow at the transition between the channels of the first and second subsets.

Abstract: A manufacturing method of a laminated core includes forming a first blanking member by blanking a band-shaped metal plate along a predetermined first blanking shape and forming a second blanking member by blanking the metal plate along a predetermined second blanking shape. The first blanking shape has a first-yoke corresponding region corresponding to a first yoke portion and a plurality of first-teeth corresponding regions corresponding to a plurality of first teeth portions. The second blanking shape has a second-yoke corresponding region corresponding to a second yoke portion and a plurality of second-teeth corresponding regions corresponding to a plurality of second teeth portions. The plurality of second-teeth corresponding regions are located between the plurality of first-teeth corresponding regions in a width direction one by one. The second teeth-corresponding region is located closer to one first-teeth corresponding region than a virtual straight line.

Abstract: An electric motor has a polygon stator core. The polygon stator core includes yoke portions and teeth extending inwardly from the yoke portions. A winding slot is formed between adjacent teeth. Adjacent yoke portions are interconnected by a connecting portion. The winding slots include first winding slots and second winding slots of different shapes. The ratio of the area of a first winding slot to the area of a second winding slot is greater than or equal to 0.9 but less than or equal to 1.1. By changing the shape of the stator core, the size of the winding slots may be increased without increasing the radial dimension of the motor.

Abstract: A side surface at the outside of a plurality of teeth portions of one separated core is faced to a side surface of teeth portions of an adjacent separated core, so as to form a second slot which is straddled between the adjacent separated cores, and a first slot is formed by a plurality of teeth portions of one separated core, and a width size of the first slot is identical to a width size of the second slot, and coil conductor storage space is formed in the first slot via a first insulating component, and coil conductor storage space is formed in the second slot via a second insulating component, and a thickness size of the first insulating component is different from a thickness size of the second insulating component.

Abstract: This invention relates to a laminated core for an electrical machine, including: a plurality of laminations configured to define a channel in a surface of the laminated core for the flow of a cooling fluid, wherein the channel has a base and at least one side wall, the at least one side wall having a stepped profile.

Abstract: An electric motor assembly includes a housing and a stator. The housing includes an outer housing surface, an inner housing surface defining an interior housing cavity, and a plurality of housing protrusions extending from the inner housing surface. The stator is disposed in the inner housing cavity and includes an outer stator surface, an inner stator surface, and a plurality of stator protrusions extending from the outer stator surface toward the outer housing surface. The stator protrusions are configured to mate with the housing protrusions to frictionally couple the stator to the housing in order to fix the stator relative to the housing.

Abstract: A motor includes an enhanced strength of a stator, the stator being formed with a plurality of core plates stacked one on top of another, and a rotor rotatably disposed at an inner side or at an outer side of the stator. Each core plate includes a body provided in a shape of an arc, a plurality of teeth radially extended from the body, and having a coil wound thereto, at least one first slit part formed on the body by being slit in a radial direction of the body, and at least one second slit part formed on the body by being slit in a circumferential direction of the body.

Abstract: A turbocompressor system including a high speed motor (10) including a rotor (12) mounted in a rotative manner relative to the stator, wherein on the rotor (12) one or more impellers (11) are directly fixed, the stator including active motor structures and a shell (7), including a ferromagnetic stator core (6) and a winding being constructed as toroidally wound coils (5), the shell (7) is constructed in such a manner as to create additional open space between the stator core (6) and the shell (7), constituting a cooling channel (15) through which process gas is passed axially for directly cooling the active motor structures and the rotor (12), prior to compression by the one or more impellers (11).

Abstract: A method for making a metallic part, includes positioning at least one metallic coil formed from flexible metal foil including a plurality of notches, on a shaping tool, the at least one coil being manually deformable when cold along three directions in space (X, Y, Z); hot isostatic pressing the at least one metallic coil in a tool causing compaction of the metallic coil so as to obtain the metallic part.

Abstract: A rotary lamination apparatus has a die assembly rotatable about an axis and a mounting table received in an axial hole extending through the die assembly. Through rotation of the die assembly, punched core pieces are mounted on the mounting table while being rotatively offset. A drive mechanism is employed to rotate the mounting table integrally with the die assembly about the axis of the die assembly.

Abstract: A rotor for a rotary electric machine includes a rotor core being rotatable around a rotational axis. The rotor core includes a plurality of steel plates stacked in a stacking direction. Each of the plurality of steel plates includes a plurality of magnet insertion piece holes, a plurality of through piece holes, a radially inner side annular ring, a radially outer side annular ring, and a plurality of ribs. The plurality of magnet insertion piece holes are provided at every first circumferential space. The plurality of magnet insertion piece holes constitute a plurality of magnet insertion holes in a state in which the plurality of steel plates are stacked in the stacking direction while the plurality of steel plates are rotated by the first circumferential space at every timing at which a predetermined number of the plurality of steel plates are stacked in the stacking direction.

Abstract: A rotor (100) for an electric motor (1000). The rotor (100) has a rotor shaft (10) and a rotor core (20) attached onto the rotor shaft (10). The rotor core has a plurality of core laminations (40, 140) arranged along an axis (A) of the rotor core (20), and has a plurality of poles of at least one pole pair, the core lamination (40, 140) having: a central recess (70, 170) through which the rotor shaft (10) passes and which has a contour (71, 171) as well as adjacent areas (AF), and a plurality of receiving structures arranged at peripheral angular positions in order to each form a receiving element for a pole-forming element on the rotor core (20).

Abstract: A stator for an electric motor that includes a plurality of stacked laminations and a polymeric shell coupled to the plurality of laminations. Each lamination includes an annular plate having a plurality of notches defined therein. Each notch has an end positioned between the side walls of the annular plate. A plurality of teeth extend from one side wall of the annular plate. Each lamination includes a first slot defined at the first end of each notch and a second slot spaced apart from the first slot, the first slots of the laminations are aligned to define a first plurality of passageways, the second slots of the laminations are aligned to define a second plurality of passageways, and the polymeric shell includes a plurality of support beams that extend through the first plurality of passageways and the second plurality of passageways.

Abstract: The invention relates to a method for the production of a soft magnetic core for generators and generator with a core of this type. To produce a core, a plurality of magnetically activated and/or magnetically activatable textured laminations is produced from a CoFeV alloy. This plurality of laminations is then stacked to form a core assembly. Then the core assembly, if consisting of magnetically activatable laminations, is magnetically activated. Finally, the magnetically activated core assembly is eroded to produce a soft magnetic core. A core of this type is suitable for a generator with a stator and a rotor for high-speed aviation turbines, the laminations in the core assembly being oriented in different texture directions relative to one another.

Abstract: A rotary lamination apparatus has a rotary lamination turntable rotational about a vertical axis. A plurality of workpieces are rotated and laminated on the turntable. The turntable includes a support member that is arranged on an upper surface of the turntable, a plurality of rolling bodies mounted on the upper surface of the turntable, and a plurality of urging members for urging the rolling bodies upward. The support member is formed of material having a high friction coefficient. The rolling bodies are selectively movable between an upper position and a lower position. In the upper position, at least a portion of each of the rolling bodies is located above the upper surface of the support member. In the lower position, each rolling body is located below the upper surface of the support member. In the upper position, the rolling bodies support the workpieces movably in a lateral direction.

Abstract: An electromagnetic actuator includes a body and first and second poles residing apart from the body. The first and second poles communicate magnetic flux across a gap with opposing end facing surfaces of the body. The body, the first pole, and the second pole are magnetically coupled and define an axial magnetic control circuit. A plurality of radial poles reside apart from the body, adjacent a lateral facing surface of the body, and communicate magnetic fluxes with the lateral facing surface. The body and the plurality of radial poles define a plurality of radial magnetic control circuits. The plurality of radial poles communicate magnetic fluxes with the lateral facing surface and at least one of the first pole or the second pole, and the body, the plurality of radial poles, and at least one of the first pole or the second pole define a magnetic bias circuit.

Abstract: Rotors assemblies usable in energy storage devices and power systems include a plurality of laminations oriented in vertical alignment, a first plate contacting a first side of the laminations, a second plate contacting a second side of the laminations, and at least one fastener engaged with the plates to compressively retain the laminations and limit relative movement of the laminations. Fasteners can engage the plates via an interference fit and pass through a clearance in the laminations sized to limit contact between the fasteners and the laminations during rotation of the rotor assembly. The laminations can be arranged with a thicker region of a first lamination above a thinner region of a second to form a stacked pair, and multiple stacked pairs can be rotationally offset from one another.

Abstract: An annular core member having an opening portion located at a position rotated by 90 degrees from a reference position, where the opening portion is oriented in the counterclockwise direction, and an annular core member having the opening portion located at the reference position, where the opening portion is oriented in the clockwise direction, are prepared to form an iron core by a rotary lamination apparatus by rotating the annular core members and by a predetermined angle (90 degrees) such that a first end, in the annular core member, which is at the position rotated by 90 degrees from the reference position and has no rotation uneven part, is circumference-positionally identical in the laminating direction with that of a fourth end, in an annular core member, which is at the reference position and has no rotation uneven part.

Abstract: The present invention comprises a stator core module, stator core assembly and process for assembling a stator core assembly to replace existing stator cores in electric power generators. First and second stator core modules are aligned such that one end of a fastener assembly in the second stator core module is nested in a counter-bore of the first stator core module and one end of a fastener assembly in the first stator core is nested in a counter-bore of the second stator core module.

Abstract: A brushless motor includes a stator and a rotor. The stator includes an m number of slots spaced apart from one another by a slot angular interval k in a circumferential direction. The rotor includes n magnetic poles. The stator core includes a plurality of core sheets stacked with circumferential positions shifted from one another by a first angle. The first angle is a product of one of a plurality of values of j and the slot angular interval k. The plurality of values of j are values that satisfy (i×n)<(least common multiple of n and m) but do not satisfy (i×n×j×(360/m))=(360×N), where i, j, and N are natural numbers.

Abstract: Embodiments of the invention provide an electric machine module including an electric machine with a stator assembly. The stator assembly includes a plurality of stator laminations and the plurality of stator laminations include a plurality of different outer diameters. The plurality of stator laminations are positioned relative to one another to form radially-extending fins. At least one circumferential coolant channel is defined along the circumference of the stator assembly by the plurality of stator laminations at least partially between the radially-extending fins.

Abstract: A linear motor includes a stator having field poles arranged linearly with opposing polarities arranged in an alternating manner; and a rotor having an armature core with teeth that faces a pole face of the field poles with a gap, and coils wound around the teeth. The stator and the rotor are supported in a slidable manner, a direction perpendicular to a sliding direction of the rotor and in parallel with the pole face is defined as a stacking direction. A head of each of the teeth has an extended portion extended in the sliding direction. At least heads of the teeth arranged at both ends of the armature core along the sliding direction is divided into a plurality of areas along the stacking direction. At least one of extended portions arranged on adjacent areas is extended by a different length along the sliding direction.

Abstract: A rotor core includes m number of rotor core blocks constituted by stacking annular sheet-like core materials in a direction of sheet thickness of each core material where m is an integer that is 2 or larger than 2, slots circumferentially arranged at regular intervals in an outer circumference of each core material, m number of catch recesses circumferentially disposed in an inner circumference of each core material at an interval obtained by (360÷m)° so as to extend radially outward, the catch recesses having an equal circumferential length and a different radially outward depth. Each rotor core block is constituted by stacking the core materials so that the catch recesses having an identical configuration in the direction of sheet thickness of each rotor core block correspond with one another. Each rotor core block is circumferentially shifted relatively by (360÷m)° from a location where the catch recesses correspond with one another.

Abstract: A laminated stator core 10 and a manufacturing method thereof, the method including producing a plurality of core sheets 15 and 16 from a strip 33, ends 34 of the strip 33 being a part of a product without being cut twice, and rotating and laminating the core sheets. A laminated stator core formed by core sheets blanked from a magnetic strip, both ends of the magnetic strip being one of the sides of the core sheets, wherein the identically shaped core sheets each have a rotor space in the center thereof, each rotor space having a center located off-center in one direction with respect to each center of the core sheets, and the core sheets are rotated by a predetermined angle before being laminated with the rotor spaces vertically aligned.

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: 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: According to the invention, the torque ripple of electrical machines is supposed to be further reduced. For this purpose, it is provided to dispose the magnetic poles, for example, on the surface of a rotor in a plurality of sections (A1, A2) at different angles. The result are helix angles (?1, ?2), which have different amounts. Also more than two different helix angles, up to a continuous course of the boundary lines (G4) between the poles, can be implemented.

Abstract: A method of manufacturing a laminated iron core using a die, includes punching out iron core pieces from a thin steel sheet material by a first working row, each piece having a spindle hole and a plurality of slot holes of a given configuration. Electrically insulating sheet pieces are punched out from an electrically insulating thin sheet material by a second working row, each piece having a spindle hole and a plurality of slot holes with a configuration similar to, but smaller than, the slot holes of the iron core pieces. Thereafter, the iron core pieces and electrically insulating sheet pieces are stacked such that edges of the slot holes of the electrically insulating sheet pieces extend outwardly beyond edges of the slot holes of the iron core pieces.

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: 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: 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: A laminated stator core 10 and a manufacturing method thereof, the method including producing a plurality of core sheets 15 and 16 from a strip 33, ends 34 of the strip 33 being a part of a product without being cut twice, and rotating and laminating the core sheets. A laminated stator core formed by core sheets blanked from a magnetic strip, both ends of the magnetic strip being one of the sides of the core sheets, wherein the identically shaped core sheets each have a rotor space in the center thereof, each rotor space having a center located off-center in one direction with respect to each center of the core sheets, and the core sheets are rotated by a predetermined angle before being laminated with the rotor spaces vertically aligned.