Class / Patent application number | Description | Number of patent applications / Date published |
310216008 | Plural axially laminated segments circumferentially united | 55 |
20100060099 | STATOR - A stator includes a core holder and a stator core configured by split cores arranged so as to form the annular shape, and press-fitted into the core holder. Each of the split cores is configured so that a plurality of metal plates is layered and fixed to each other by dowel-fastening. Each of the split cores includes an outer circumference groove portion and a dowel-fastening portion, the outer circumference groove portion being formed at a portion of an outer circumferential surface of the split core radially outer than the dowel-fastening portion so as to be recessed in a radially inward direction of the stator core to include a predetermined depth. | 03-11-2010 |
20110204743 | ROTOR OR STATOR FOR AN ELECTRODYNAMIC MACHINE | 08-25-2011 |
20110248597 | SEGMENT CORE FORMING STATOR CORE OF ROTARY ELECTRIC MACHINE AND METHOD FOR MANUFACTURING THE SEGMENT CORE - A segment core forms an annular-shaped stator core of a rotary electric machine. The stator core is formed into an annular shape by circumferentially connecting a plurality of segment cores, each segment core having a L shape and includes a yoke portion that forms the outer periphery of the stator core, a tooth portion that extends from the yoke portion to the rotary axis in a radial direction of the stator core, and a steel plate where the yoke portion and the tooth portion are formed wherein one edge of the segment core linearly extends along the yoke portion and the tooth portion in the radial direction of the stator core, the other edge forms a projection in the yoke portion jutting out from the tooth portion in the circumferential direction whereby a segment core is formed into a shape of an L. | 10-13-2011 |
20110298330 | GENERATOR FOR A WIND ENERGY INSTALLATION AND METHOD FOR ITS PRODUCTION - Disclosed is a generator for a wind energy installation having a rotor which has permanent magnets and is directly connected for drive purposes to a blade rotor of the wind energy installation, and having a stator which has an iron core composed of laminates. The generator is formed without the rotor or the stator on the external circumference as a completely surrounding housing, and the laminates of the stator are connected to one another by adhesive bonding and/or welding. | 12-08-2011 |
20120112598 | ELECTRICAL MACHINE STATOR ASSEMBLY - An electrical machine such as a motor has a stator on which toroidal coils are mounted on a segmented backiron. The segments overlap to produce a graded magnetic flux at the joint between two segments, and the number of segments and the position of the joints with respect to the phases of the machine coils and the poles of the rotor are such that the flux joints are distributed evenly across the phases and the poles while allowing assembly of the machine backiron with the coils mounted on the segments. This results in a motor with no sudden flux changes in the stator and therefore reduced cogging and incipient noise. | 05-10-2012 |
20120169174 | AXIALLY-SPLIT STATOR CONSTRUCTION FOR ELECTRIC MOTORS - This invention relates to the construction of stators for use in electric motors. A stator for an electric motor comprises an elongate tubular body defining a central cavity in which a rotor can be located, the body defining a series of axial slots extending parallel to the body axis and a series of electrical conductors extending along the channels to form electrical windings, wherein the body is formed from at least two part-circular segments of substantially the same length, the segments together defining the central cavity. | 07-05-2012 |
20120169175 | Motor, manufacturing method for the same and washing machine - A motor includes a ring-shaped stator, and a rotor to be rotated via electromagnetic interaction with the stator. The stator includes core plates stacked one above another. Each core plate includes an arc-shaped body and a plurality of teeth connected to the body, on which a coil is wound. The body of the core plate includes at least one bending inducer incised in a circumferential direction of the body. | 07-05-2012 |
20120248927 | ELECTRIC MOTOR - An electric motor includes a stator and a rotor installed in the stator. The stator has a laminated stator core and at least two stator windings wound on the stator core. The stator core has at least two stator poles facing the rotor and at least two yokes connecting adjacent stator poles. T stator core is constituted by at least two separate members joined together. The at least two stator poles are only arranged at a single one of the at least two separate members. | 10-04-2012 |
20120286621 | Lamination For Stator Core, Stator Core Comprising Said Lamination and Method For Making Said Lamination - Modular element ( | 11-15-2012 |
20130049521 | ROTARY ELECTRIC MACHINE AND STATOR FOR ROTARY ELECTRIC MACHINE - A stator for a rotary electric machine has a plurality of core bodies arranged in an annular shape and held by a circular cylindrical holding ring. Each of core teeth included in the respective core bodies includes a tooth portion which radially extends when the core tooth is attached to the holding ring, and around which a coil is wound. The core tooth includes a back yoke portion which circumferentially extends and is connected to the radially outward side of the tooth portion. The outer circumferential surface of each of the back yoke portions has a protruded portion at the circumferential center thereof and has recessed portions at opposite circumferential ends thereof. The protruded portion protrudes radially outwardly from a reference circle located a predetermined distance apart from the axial center of a stator, and the recessed portion is recessed radially inwardly from the reference circle. | 02-28-2013 |
20130134824 | STATOR CORE - Disclosed is a stator core, the stator core including a first split core module having a first height (h | 05-30-2013 |
20130229084 | TURBINE GENERATOR STATOR CORE ATTACHMENT TECHNIQUE - A stator core ( | 09-05-2013 |
20140252912 | ROTOR OF AN ELECTRIC MACHINE - The invention relates to a rotor of a rotary electric machine, in particular for a flux-switching or wound-rotor machine, a mounting for installing the rotor on a shaft and a plurality of magnetic sectors, preferably in the form of a strip, attached to the mounting. | 09-11-2014 |
20160056676 | PARTIALLY SEGMENTED WOUND ROTOR ASSEMBLY FOR HIGH COPPER FILL AND METHOD - A partially segmented rotor assembly for an electric motor and a method for the same is provided. The partially segmented rotor assembly includes a first rotor segment and a plurality of second rotor segments. The first rotor segment has a plurality of first poles wound with a wire and defines a first circumferential gap between the wire of each adjacent pair of the first poles. Each second rotor segment has a second pole wound with the wire and is rigidly attached to the first rotor segment in a respective one of the first circumferential gaps to form a plurality of second circumferential gaps between the wire of each first pole and the wire of the adjacent second poles. The first and second rotor segments are configured to cooperate with one another to minimize the second circumferential gaps. | 02-25-2016 |
20190148997 | STATOR, BLOCK OF STATOR, AND ROTARY ELECTRICAL MACHINE | 05-16-2019 |
20220140668 | Electric Machine and Method for Manufacture - An electric machine includes a core comprising a plurality of core segments extending in a longitudinal direction and a plurality of slots being equally spaced peripherally around the core and formed between cutouts in adjacent segments. A plurality of windings is disposed on the core and includes straight portions disposed in the plurality of slots and turn portions extending past at least one axial end of the core along the longitudinal direction. The core and windings are assembled together in an unrolled condition, where the mat is placed in an unrolled core, and then rolled together to form a stator or rotor. | 05-05-2022 |
310216009 | Having particular mating joint structure | 39 |
20100001611 | STATOR HAVING HIGH ASSEMBLY - In a stator, when a number of a plurality of core segments circumferentially arranged is represented as n, a length of a maximum projecting portion of a circumferential projection of each of the plurality of core segments from one of the first and second radial sides thereof is represented as p, a radial length of a maximum projecting portion of the circumferential projection of each of the plurality of core segments from a circumferentially extended line from the bottom of the slot is represented as q, and a length of the slot with respect to the bottom thereof in a radial direction of the stator core assembly is represented as t, the number n, the length p, the length q, and the length t meet the following equation: | 01-07-2010 |
20100052465 | STATOR OF ELECTRIC ROTATING MACHINE - 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. | 03-04-2010 |
20100231084 | CORE BLOCK, AND MAGNETIC POLE CORE USING CORE BLOCKS FOR MOTOR - A core block has an arm portion, and a yoke portion extending circumferentially at an end of the arm portion. At least the yoke portion is configured such that a plurality of core segments are stacked in multiple levels in an axial or radial direction. Each of the core blocks has engaging portions formed at respective opposite ends of the yoke portion and adapted to connect adjacent core blocks. In a first-level core segment, each of the engaging portions has a protrusion extending circumferentially from a corresponding one of the opposite ends of the yoke portion, and a recess juxtaposed radially to the protrusion and adapted to receive the protrusion of an adjacent core block. In a second-level core segment, each of the engaging portions has the protrusion and the recess provided in positionally reversed relation with those of the first-level core segment with respect to the radial direction. | 09-16-2010 |
20110148246 | STATOR AND MOTOR PROVIDED WITH THE STATOR - A stator includes a stator core formed from a plurality of split cores arranged in a circumferential direction, and a cylindrical body that surrounds the stator core from a periphery and secures the stator core. The split cores each have a first end portion on one end in the circumferential direction, and a second end portion on the other end in the circumferential direction. The first end portion has a protruding portion that protrudes outward in the circumferential direction, and the second end portion has a depressed portion that is depressed inward in the circumferential direction and fits together with the protruding portion of the first end portion of an adjacent split core. | 06-23-2011 |
20110169367 | STATOR OF AN ELECTRIC MOTOR - A stator for an electric motor has a stator core, a winding and a housing enclosing the stator core and winding. The stator core has a yoke and a plurality of poles extending inwardly from the yoke. The winding formed by coils wound about the poles of the stator core. The housing grips the stator core and has at least one inwardly deformed portion that retains the stator core in the housing and prevents rotational movement of the stator core relative to the housing. A method of producing the stator is also disclosed. | 07-14-2011 |
20110169368 | ROTATING ELECTRICAL MACHINE - 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. | 07-14-2011 |
20110187221 | STATOR FOR AN ELECTRIC MOTOR - Disclosed is a stator for an electric motor, especially a stepping motor, comprising at least two stator parts ( | 08-04-2011 |
20110248598 | MOUNTING-STRUCTURE OF STATOR CORE ADAPTED TO ROTATING ELECTRICAL MACHINE - A stator core of a rotating electrical machine, in which no compressive load is applied to divided cores each having an arc shape, when the divided cores are secured into a circular form, thereby decreasing the motor loss and improving the motor efficiency. The divided cores are circularly disposed, and the divided cores each having the arc shape in section perpendicular to the axial direction of the rotary axis. In the divided cores, there are provided welded portions each of which is diagonally formed between one corner end of a connecting edge and an opposite corner end of a neighboring connecting edge, thereby providing the welded portion diagonal with respect to the axial direction. The connecting edges are in parallel to the axial direction. | 10-13-2011 |
20110266913 | SEGMENTED STATOR ASSEMBLY - A stator assembly includes a segmented stator having stator portions. Each stator portion includes a support structure and dovetails, each coupled to the support structure by adjustable elements. The stator portion also includes stator laminations, where each of the laminations has openings to engage with the dovetails. Connectors are provided to connect the stator portions of the segmented stator together. | 11-03-2011 |
20120001515 | STATOR FOR ELECTRIC ROTATING MACHINE - 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. | 01-05-2012 |
20120056503 | PROCESS AND MOLD FOR PRODUCING FERROMAGNETIC CORES OF ELECTRIC MOTORS - A process and a blanking mold are described for the production of a ferromagnetic core for electric motors formed by a plurality of segments, The laminations are blanked from a sheet of ferromagnetic material and stacked in an accumulation chamber of the blanking mold, along which they advance until a segment constituted by a stack having a preset number of laminations is formed, which is mechanically connected to an adjacent segment, thereby forming a rectilinear sequence of segments, The segments are hinged to each other with the possibility of mutual rotation to allow the sequence of segments to be brought from the rectilinear condition to a closed circular configuration. | 03-08-2012 |
20120112599 | Stator and Motor Comprising Same - The present invention relates to a stator and a motor equipped with the stator, the stator including an inner core including a boss and a plurality of teeth radially formed at a periphery of the boss; a coil wound on each tooth; an outer core multiply divided to be coupled between the plurality of teeth; and a press-fitting unit formed at the inner core and the outer core to allow the outer cores to be press-fitted between the teeth, whereby it is easy to assemble the stator and to wind the coil, thereby reducing a manufacturing cost and enhancing concentricity level between an external diameter and an inner diameter of a stator core. | 05-10-2012 |
20120126658 | ROTOR CORE FOR ROTATING ELECTRIC MACHINE - A rotor core for a rotary electric machine includes a plurality of ring-shaped core plates. The core plates are formed by joining arc-shaped segments. The core plate segments each include a protruding portion that is formed on one surface of each of the segments and has an end in the circumferential direction that is arc-shaped, and a recessed portion that is formed on the other surface and has an end in the circumferential direction that is arc-shaped, and to which the protruding portion of the core plate segment of another layer is fitted when the core plates are laminated. An interference fit is provided between the protruding portion width of the core plates and the recessed portion of the core plates in the radial direction and a loose fit is provided in the circumferential direction. | 05-24-2012 |
20120153768 | STATOR CORE OF ROTATING ELECTRICAL MACHINE - A stator core of a rotating electrical machine includes an annular first core plate including a plurality of first core plate pieces and an annular second core plate including a plurality of second core plate pieces. A predetermined number of the first and second core plates are alternately laminated such that stator fixing portions overlap with each other and such that positions of joints between the first core plate pieces of the first core plates differ from positions of joints between the second core plate pieces of the second core plates in the circumferential direction. | 06-21-2012 |
20120228987 | STATOR CORE - A stator core capable of improving stator core segments in assemblability, positioning accuracy and rigidity is provided. A stator core includes a plurality of stator core segments, and a yoke part of each stator core segment has a first junction and a second junction joined to other adjacent stator core segments. A protrusion is formed at the first junction, and a recess capable of receiving the protrusion is formed at the second junction. The opening area of the recess increases from a deepest section of the recess to an opening of the recess. In the yoke part, a first caulking site where the stator core segment is caulked in an axial direction is formed on an arc passing through the central part of a radial length of the protrusion and extending in a circumferential direction. | 09-13-2012 |
20120248928 | ROTARY ELECTRIC MACHINE LAMINATED CORE - In a rotary electric machine laminated core, a rotating shaft portion is disposed closer to an outer circumferential surface than an inner circumferential surface of a back yoke portion. A notch portion is disposed on at least one of first and second end portions of the back yoke portion so as to form a gap between a vicinity of the rotating shaft portion of a projecting portion and a recess portion when core segments are arranged in an annular shape or a circular arc shape. The first end portion and the second end portion of the back yoke portion are configured such that a predetermined gap that connects from the outer circumferential side to the inner circumferential side is formed between adjacent projecting portions and recess portions when the core segments are expanded rectilinearly such that magnetic pole tooth portions are parallel to each other. | 10-04-2012 |
20120274173 | ALIGNMENT OF SEGMENTED STATORS FOR ELECTRIC MACHINES - A stator segment for a segmented stator of an electric machine includes insulative material configured for overlapping with insulative material of an adjacent stator segment to provide continuous insulation along a joint between the adjacent stator segments. Additionally, or alternatively, the stator segment can include one or more alignment tabs configured to engage a surface of an adjacent stator segment to inhibit relative axial movement between adjacent stator segments. | 11-01-2012 |
20130002086 | SEGMENTED STATOR CORE - A stator core includes a first lamination and a second lamination. The first lamination is formed from a plurality of first segments and has a plurality of first mounting ears. The second lamination is formed from a plurality of second segments and has a plurality of second mounting ears. The first lamination and the second lamination are aligned with a common axis and are rotated about the common axis such that the first lamination is not aligned with the second lamination. | 01-03-2013 |
20130038169 | ELECTRICAL ROTARY MACHINE - An electrical rotary machine comprises a stator having a plurality of split cores arranged in an annular shape and a holding ring capable of retaining the plurality of split cores on an inner circumferential surface so that a surface pressure is applied to an outer circumferential surface of the split cores. The electrical rotary machine further comprises a rotor provided radially inside of the stator facing the split cores in a radial direction and rotatable relative to the stator. Each of the split cores includes a tooth portion extending in an radial direction and a back yoke portion extending in a circumferential direction. Each of the split cores further includes a slit penetrating an outer circumferential periphery of the back yoke portion except for either circumferential end of the back yoke portion. | 02-14-2013 |
20130069479 | STATOR CORE - A stator core includes at least one bendable strip-shaped core. Each strip-shaped core is formed by stacking a plurality of laminations. Each lamination includes at least two yoke portions and at least two tooth portions. Every two adjacent yoke portions are connected to each other via a bendable portion and have two opposite end surfaces, one of the end surfaces having a groove and the other having a projecting rib. After the bendable portion is bent the projecting rib is engaged in the groove to form an interlock structure such that relative circumferential movement between the adjacent yoke portions is limited. | 03-21-2013 |
20130162099 | ROTOR OF ROTATING ELECTRICAL MACHINE - A rotor of a rotating electrical machine includes a rotor core which includes an annular core plate formed by coupling a plurality of arc shaped core plate pieces. Multiple core plates are stacked together. A circumferential position of a seam formed by coupling the core plate pieces is alternately displaced for every predetermined number of core plates in a stacking direction of the core plates. A bar-shaped member is inserted in a plurality of through holes formed in the respective core plate pieces and aligned in the stacking direction. Both side surfaces of the rotor core in the stacking direction are interposed between end plates, the end plates contact the core plates, and the end plates do not contact the bar-shaped member at least on a radially outside of the bar-shaped member, which is a side in a direction of a centrifugal force that acts on the bar-shaped member. | 06-27-2013 |
20130169104 | STATOR CORE OF MOTOR FOR WASHING MACHINE - 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. | 07-04-2013 |
20130187514 | STATOR CORE OF MOTOR, AND MANUFACTURING METHOD - A stator core comprises a circumferentially deformable part formed on a radially outer peripheral side of a yoke; circumferentially facing divided parts formed on a radially inner peripheral side of the yoke, each having a dividing line that is oriented in a radial direction and reaches a portion between teeth and divided surfaces that face each other without a gap; and radially facing divided parts formed at the center between the radially inner and outer sides of the yoke along the circumferential direction at the predetermined interval, and each having divided surfaces that face each other in the radial direction, and being continuous at one ends with the respective circumferentially facing divided parts. The circumferentially facing divided parts each have a compressive stress being smaller than a compressive stress acting on the circumferentially deformable part or being zero. | 07-25-2013 |
20130249345 | SEGMENTED ROTOR IN A ROTOR ASSEMBLY - A rotor assembly is provided. The assembly includes a hub and a rotor core having a first rotor lamination positioned at least partially around the hub. The first rotor lamination is at least partially defined by a first segment and a second segment that are configured to connect or interlock. The first segment includes a projection extending from a first body. The projection is configured to engage with a corresponding notch in the second segment in order to connect the first segment to the second segment. At least one first mounting tab extends from the first body and is configured to engage with a corresponding first groove on an outer periphery of the hub in order to connect the first segment to the hub. | 09-26-2013 |
20130264905 | TRANSVERSE AND/OR COMMUTATED FLUX SYSTEMS HAVING SEGMENTED STATOR LAMINATIONS - 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. | 10-10-2013 |
20130270960 | ELECTRIC MACHINE STATIONARY ASSEMBLY AND METHODS OF ASSEMBLING THE SAME - An electric machine stationary assembly is described. The stationary assembly includes a plurality of stacked laminations each comprising a first end and a second end. The stationary assembly also includes a mechanically deformable first fastening feature positioned at the first end of each lamination. The stationary assembly also includes a second fastening feature positioned at the second end of each lamination and configured to cooperate with the first fastening feature to couple the first end to the second end. | 10-17-2013 |
20130320801 | SPLIT CORE AND STATOR CORE - A split core of the invention is formed from a plurality of magnetic steel sheets that are stacked in a thickness direction and joined together by crimping, and that when provided in plurality, forms a stator core by being arranged in a circle. This split core includes a yoke that extends in a circumferential direction; a tooth that extends radially inward from an inner peripheral side end portion of the yoke; and an abutting portion that is formed on a joining surface of the yoke that joins with a yoke of another adjacent split core. A radial crimping portion that is longer in a radial direction and is positioned to an outer peripheral side of a maximum outer radius of the abutting portion, and that is crimped to a crimping portion of another magnetic steel sheet, is provided on each of the magnetic steel sheets. | 12-05-2013 |
20130328437 | STATOR CORE FOR A GEARLESS DRIVE OF A TUBE MILL - A stator core with a high stiffness is disclosed for a gearless drive of a tube mill, the stator core, together with a stator frame, forming a stator for a gearless drive for a tube mill, and the stator core being assembled from stator core pieces. The stator core pieces can be connected to one another in the direction of rotation of the tube mill, independently of the stator frame. | 12-12-2013 |
20140091671 | STATOR CORE, SPLIT CORE BLOCK, STATOR MANUFACTURING METHOD AND ROTARY ELECTRIC MACHINE - A stator core is formed by laminating a plurality of annular core plates one on top of another. The stator core includes a cylindrical yoke and a plurality of radially protruding teeth arranged at a specified interval along a circumferential direction of the yoke. Each of the core plates includes a plurality of annularly-arranged split cores each having a yoke portion forming the yoke and a tooth portion protruding from the yoke portion and forming the teeth. The yoke portion includes a first yoke section and a second yoke section extending different lengths at opposite lateral sides of the tooth portion. | 04-03-2014 |
20140139068 | LAMINATED CORE MANUFACTURING METHOD AND LAMINATED CORE MANUFACTURED USING SAME - A laminated core manufacturing method is linearly arranging and punching out a plurality of separate core pieces formed of a back yoke portion and a magnetic-pole teeth portion protruding from the back yoke portion and die-cut caulking. The manufacturing method includes: a first step of punching out a first region located on an opposite side to the magnetic-pole teeth portion between adjacent ends of the back yoke portions of the core pieces; a second step of punching out a second region located on a side of the magnetic-pole teeth portion between the adjacent ends of the back yoke portions of the core pieces; a third step of punching out a region that brings the first region punched out in the first step and the second region punched out in the second step into communication; and a fourth step of forming the magnetic-pole teeth portion by punching. | 05-22-2014 |
20140167556 | ELECTRIC ROTATING MACHINE - Disclosed is an electric rotating machine that includes a stator and a rotor. The stator includes a housing and a cylindrical stator core secured to the housing by shrinkage fitting. The rotor is rotatably disposed inside the stator. The stator core is formed of two or more circumferentially split cores. Spilt surfaces of the split cores are shaped in such a manner that the amount of distortion caused on the split surfaces on the outside diameter side by the shrinkage fitting is greater than the amount of distortion caused on the split surfaces on the inside diameter side by the shrinkage fitting. | 06-19-2014 |
20140300242 | BRUSHLESS MOTOR - A brushless motor may comprise a stator. The stator may comprise a core body comprising a plurality of partial cores and a coil wire. Each partial core may comprise a yoke positioned on an outer edge of the stator, teeth extending towards a rotor from the yoke, and a connector extending to an adjacent partial core from the yoke, to be connected to the yoke of the adjacent partial core. The stator may be formed to be in a tubular state by being transformed from an opened state. Each of the yokes of the partial cores may comprise a facing surface facing the yoke of the adjacent partial core. At least one set of the facing surfaces among a plurality of sets of the facing surfaces facing each other may be disposed with a gap in between in the circumferential direction of the stator. | 10-09-2014 |
20140361657 | MAGNETIC CIRCUIT COMPRISING SECTORS - The invention relates to a magnetic circuit for a rotary electric machine, including: a plurality of packs of sheets stacked to form sectors, the facing sidewalls of said packs including nestable projections; and inserts introduced into housings defined at least partially by the nesting of the projections, said inserts being used to assemble the sectors to one another. | 12-11-2014 |
20150042199 | STATOR CORE FOR MOTOR AND MANUFACTURING METHOD THEREFOR - A stator core includes an annular yoke portion and tooth portions, wherein an outer peripheral edge of the yoke portion is attached to an inner peripheral surface of a motor case. The yoke portion includes displacement portions displaced by receiving the radially-inward pressing force from the motor case, and deformation portions deformed according to the displacements of the displacement portions to generate tensile stress so as to form tensile stress regions through which magnetic flux passes between the tooth portions and the yoke portion or so as to counterbalance compression stress generated by the pressing force from the motor case. The displacement portions perform the displacements by attaching the yoke portion to the annular member with the interference. | 02-12-2015 |
20150048712 | SEGMENTED STATOR WITH CONTROLLED EDDY CURRENT - An electrical machine includes a rotor with a rotational axis, a coil arranged circumferentially with respect to and fully encircling the rotational axis, and a stator assembly. The stator assembly includes first and second lamination stacks comprising associated pluralities of laminae, the stacks being arranged circumferentially with respect to the rotational axis on opposing sides of the coil for conducting magnetic flux. The stacks are configured with gaps generally radially through the laminae thereof, defining separate circumferential segments in each laminae, to prevent creating a continuous electrical circuit around the rotational axis in the segments. Each laminae has a connecting ring spaced radially from the segments, and beams connecting the segments to the ring as a unitary piece. Back return elements extend axially between the stacks to provide a flux path therebetween, and are positioned circumferentially between adjacent parts of the beams and radially between the segments and the ring. | 02-19-2015 |
20150333577 | LAMINATED CORE FOR MOTOR AND METHOD FOR MANUFACTURING THE SAME - Disclosed herein is a laminated core for a motor manufactured by laminating sheets of a plurality of cores. The laminated core is formed by connection of a plurality of split cores, yoke parts of the split cores which are adjacent to each other get in contact with each other so as to form a contact part, and a connection caulking part is formed at the contact part. | 11-19-2015 |
20150364954 | STATOR WITH CORE INCLUDING DIVIDED CORES, AND ELECTRIC MOTOR - Provided is a stator that can easily attach a coil to a tooth and that can reduce concentration of stress generated in the core during the operation. The stator includes a core with an annular back yoke, and a plurality of teeth aligned in a circumferential direction, each tooth extending toward a radially inside from the back yoke; and a coil wound around each of the plurality of teeth. The core includes a plurality of divided cores aligned in the circumferential direction. Each divided core includes the tooth, and a divided back yoke extending from an end on a radially outside of the tooth to a first circumferential side. A radial width of the divided back yoke is smaller than or equal to a circumferential width of the tooth. A connecting surface is arranged at an end on a second circumferential side of the divided yoke, the connecting surface being a plane or a convex surface extending from a side surface on the second circumferential side of the tooth to an outer circumferential surface of the divided back yoke. | 12-17-2015 |
20160164350 | LAMINATE AND METHOD FOR MANUFACTURING THE SAME AND METHOD FOR MANUFACTURING LAMINATED CORE - This disclosure relates to a method for manufacturing a laminate used for manufacturing a laminated core including a circumferential yoke part and a plurality of magnetic pole parts radially extending from the yoke part. This method includes: feeding a metal sheet drawn from a roll thereof to a progressive die; stamping out a plurality of workpieces from the metal sheet in the progressive die, wherein each of the workpiece comprises a temporarily-interlocking portion between adjacent magnetic pole portions; and stacking the workpieces to integrate these workpieces together by the temporarily-interlocking portion to obtain the laminate. | 06-09-2016 |
20160164351 | STATOR CORE FOR AN ELECTRONICALLY COMMUTATED DIRECT CURRENT MOTOR AND METHOD FOR PRODUCING A STATOR - A stator core for an electronically commutated DC motor with an internal rotor having a plurality of radially inwardly directed pole cores which at their periphery are integral with back iron segments and the back iron segments are integral with adjacent back iron segments via webs, wherein the back iron segments alternate with the webs and jointly form a seamless closed one-piece ring. A method of ensuring that in the case of a stator core of this class, upon a reduction of the stator diameter and reduction of the pole distances after winding, a clearly defined end position of the adjoining regions can be assumed, and that for this process, only minimal forces are necessary, in which damage to the stator core is not to be expected, and that at the end of the process only a very small and uniform air gap remains at a lowest possible spring-back. | 06-09-2016 |