Abstract: A power supply circuit supplies a current from a DC voltage source to first and second actuator coils to support an object in a non-contact manner by electromagnetic force. The power supply circuit includes a first leg connected to the DC voltage source, and a control unit. The first leg has first upper and lower arm switching elements connected in series. The control unit turns the switching elements on and off to control the current supplied to the actuator coils. A midpoint between the switching elements is connected to a connection point between the actuator coils. A freewheeling diode is provided for each of the switching elements in parallel. The control unit performs control so that the current flows through the first actuator coil in a direction toward the connection point, and the current flows through the second actuator coil in a direction coming out of the connection point.

Abstract: A rotor of a rotary electric machine includes a rotor core and a magnetic pole portion. The magnetic pole portion includes a magnet portion having at least two layers along a radial direction, which has an outer diameter side magnet portion including an outer diameter side arc magnet and an inner diameter side magnet portion including a pair of inner diameter side arc magnets arranged with a d-axis interposed. In addition, a pair of ribs extending in the radial direction are respectively provided between d-axis side end surfaces of the pair of inner diameter side arc magnets and the d-axis. A gap portion is provided between the pair of ribs to overlap the d-axis.

Abstract: A hybrid switched reluctance motor is provided that reduces torque ripple. A novel rotor design includes flux barriers. The flux barriers are positioned and shaped to create implicit saliency and reluctance torque for the motor. A gradual change in the motor reluctance results which avoids rapid increases in flux density. The rotor also increases efficiency by reducing acoustical and vibrational responses and associated energy loses.

Abstract: In a rotating electric machine, a rotor core includes; a gap surface; a plurality of magnet insertion holes; a slit which is formed in a core region between the gap surface and, among the plurality of magnet insertion holes, a magnet insertion hole into which a permanent magnet forming one magnetic pole is inserted, and divides the core region into a plurality of divided core regions in the circumferential direction; and a cutout formed by denting the gap surface of a divided core region, wherein a shortest distance between a stator core imaginary gap surface which is in contact with distal end surfaces of the plurality of teeth, and a bottom point of the cutout is longer than a shortest distance between the stator core imaginary gap surface and each of two intersections between the cutout and the gap surface.

Abstract: In a rotor in which magnet slots arranged in a V shape so as to open toward the outer circumferential side and having permanent magnets inserted therein are formed in a two-layer structure in a radial direction, the magnet slots in each layer are composed of a pair of slots formed between a center bridge located at the center and respective ones of two radially-outer bridges located between the outer surface of the rotor and the respective slots. Of magnetic fluxes generated from the permanent magnets, magnetic fluxes excluding magnetic fluxes for magnetically saturating the bridges are defined as effective magnetic fluxes. The rotor is configured such that the effective magnetic flux generated from the permanent magnet on the radially outer side is not greater than half the effective magnetic flux generated from the permanent magnet on the radially inner side.

Abstract: A rotor core has first and second core parts in an axial direction. The first and second core parts have first and second magnet insertion holes in which rare earth magnets are disposed. A width of the first magnet insertion hole is wider than the second magnet insertion hole. The first core part has one or more slits elongated in the radial direction, the number of which is N1 (?1), on a radially outer side of the first magnet insertion hole. The second core part has no, one or more slits elongated in the radial direction, the number of which is N2 (?0), on a radially outer side of the second magnet insertion hole. N1>N2 is satisfied. A ratio of a length of the second core part in the axial direction to that of the rotor core is greater than or equal to 70% and less than 100%.

Abstract: A permanent magnet motor comprises: a rotor assembly configured to be rotatable relative to a stator, wherein the rotor assembly defines magnet pockets, a segmented permanent magnet comprising a plurality of magnet segments, which include one or more magnet segments of the segmented permanent magnet have different magnetic material from another or other magnet segments of the segmented permanent magnet, is disposed in each of the magnet pockets of the rotor assembly. The segmented permanent magnet is segmented in a circumferential direction. The one or more magnet segments of the segmented permanent magnet comprises magnetic material having higher coercivity, or operable at a higher temperature, than the another or other magnet segments of the segmented permanent magnet. The one or more magnet segments of the segmented permanent magnet comprise rare earth permanent magnet, high energy density magnet, samarium cobalt (Sm—Co) magnet or neodymium iron boron (Nd—Fe—B) magnet.

Abstract: An axial flux electric motor for an automobile includes a stator assembly, and a rotor assembly, the rotor assembly including a plurality of lamination blocks arranged in an annular pattern, a plurality of conductive wedges, one conductive wedge being positioned between each adjacent pair of lamination blocks, the plurality of lamination blocks and the plurality of conductive wedges defining a rotor core disk having an inner diameter and outer diameter and opposing axial faces, and a plurality of permanent magnets attached to one of the opposing axial faces of the rotor core disk.

Abstract: Construction of a permanent magnet rotor assembly having a plurality of magnetic poles and comprising a number of magnetic pole pieces arranged in circular array. Two sets of permanent magnets—one set magnetised in circumferential direction of the rotor and the second set providing flux in axial direction of rotor, generating a magnetic flux focused through the pole piece and interacting with the magnetic flux of the stator. End-plates made of magnetic material are present such there is an axial gap between the them and the array of magnetic pole pieces. Circumferentially magnetised magnets are placed in the circumferential gaps between the pole pieces, whereas the magnets providing flux in axial direction are placed in the gaps between the array of pole pieces and end-plates.

Abstract: The present disclosure provides a motor having an asymmetric rotor core that can more effectively improve operation efficiency of a motor and improve NVH performance in correspondence to the tendency of high power and high efficiency of motors by asymmetrically forming a first slot and a second slot for inserting permanent magnets of the rotor core, arranging a first permanent magnet and a second permanent magnet at different embedment angles, and forming a separation wall inclined at a predetermined angle and having a uniform thickness between the first slot and the second slot.

Abstract: An electric motor includes: a rotor including a first rotor core and a second rotor core; and a stator. A minimum distance from the first rotor core to the stator is shorter than a minimum distance from the second rotor core to the stator. A maximum radius of the first rotor core is longer than a maximum radius of the second rotor core. A shape of a first thin-wall part of the first rotor core and a shape of a second thin-wall part of the second rotor core are the same.

Abstract: A rotor for an electric machine, includes a rotor lamination stack divided into a plurality of sectors, in each of which there is arranged a permanent magnet assembly which comprises two permanent magnets positioned in a V-shape symmetrically with respect to a plane of symmetry dividing the sector into two half-sectors, wherein an outer radius of the rotor lamination stack in a particular sector has a pair of local minimum values, which are formed symmetrically to one another with respect to the plane of symmetry in a half-sector of the sector.

Abstract: An interior permanent magnet rotor, for a drive unit disposed in the interior of a hermetically sealed housing of a refrigerant compressor, whereas the rotor includes a first axial section with permanent magnets, followed by a second axial section without permanent magnets. In order to reduce the risk of a magnetic short-circuit it is provided that the second axial section, adjacent to the first axial section, includes a first axial subsection with a reduced radial dimension not going beyond the permanent magnets in the first axial section, whereas the axial length of the first axial subsection is smaller than the axial length of the first axial section, and the second axial section, adjacent to its first axial subsection, includes a second axial subsection with a radial dimension larger than the reduced radial dimension of the first axial subsection.

Abstract: In a method for producing a material layer for a rotor of a dynamoelectric rotary machine, a first suspension with binding agent and solid particles is applied through a first screen onto a base to form a first green body, thereby reproducing a first region of a first material with a first degree of strength. A second suspension with binding agent and solid particles is applied through a second screen onto a base to form an annular second green body concentrically to a layer center, thereby reproducing a second region of a second material with a second degree of strength being higher than the first degree of strength. The first and second green bodies are joined such as to form a material recess substantially at a layer center. A permanent material bond of the first and second green bodies and the solid particles is created by heating and/or by compression.

Abstract: A rotary electric machine includes: a rotary shaft member; first and second rotor including first and second rotor core, respectively, including first and second permanent magnets having first and second polarity, first and second magnet-based magnetic pole portions having the first and the second polarities and being formed by the first and the second permanent magnets, and first and second iron core portions having the second and the first polarities and being formed by iron pole portions of the first and the second rotor core, are alternately arranged in a circumferential direction of the first rotor core; a stator; and a field yoke. Further, the first magnet-based magnetic pole portion and the second iron pole portion face each other and the first iron pole portion and the second magnet-based magnetic pole portion face each other in the axial direction.

Abstract: A rotor structure and a rotor structure manufacturing method capable of suppressing magnetic flux leakage and exhibiting an excellent torque-up effect are provided.

Abstract: A method of manufacturing a rotor core, the method including laminating first laminated steel plates in an axial direction. The first laminated steel plates each include a plurality of flake portions arranged in a circumferential direction with gaps between each other and a plurality of protrusions protruding radially outward from an outer side surface of a base portion and each having at least a portion located in the gap between the flake portions. The method further includes fixing the base portions to each other and fixing the flake portions to each other. The method further includes removing the protrusions of the laminated steel plates radially outward.

Abstract: An electric machine is described, and includes a rotor that is rotatably disposed in a stator. The rotor includes a rotatable shaft that is disposed on a longitudinal axis, and a plurality of laminations that are disposed on the rotatable shaft. The plurality of laminations are arranged on the rotatable shaft to form a plurality of axially-disposed cavities, wherein each of the cavities is defined by a surface. A coating is disposed on the surfaces of the cavities, and a curable filler material is introduced into each of the cavities. The curable filler material adheres to the plurality of laminations via the coating.

Abstract: According to the present invention, provided is an IPM rotor of the present invention, which includes a plurality of core sheets, having hole portions configured to accommodate magnets and being laminated on one another, and the magnets are inserted in the hole portions. The IPM rotor includes a first core sheet having a spring plate portion provided to the hole portion, and a second core sheet having a recessed portion provided the hole portion. A protruding portion is provided to the hole portion of at least one of the plurality of the laminated core sheets. The protruding portion is provided to at least one of the hole portion of the first core sheet, the hole portion of the second core sheet, or a hole portion of a third core sheet to be further arranged.

Abstract: A rotor assembly for a motor is disclosed. The motor has a minimum air gap width value. The rotor assembly includes magnets, a main-body portion, magnet-receiving slots and arc-trimming portions. Each of the magnet-receiving slots is disposed around a central axis of the main-body portion and locates through the main-body portion for accommodating the corresponding magnet therein. The magnet-receiving slot has a slot width value. The arc-trimming portions spatially correspond to the magnet-receiving slots. Each of the arc-trimming portions and a geometric symmetry center of the corresponding magnet-receiving slot together form an arc-trimming depth value. The arc-trimming depth value is greater than a sum value of a rate constant multiplied by the slot width value and then subtracted 2 times of the minimum air gap width value, and is less than the sum value of the rate constant multiplied by the slot width value and then plus 2 times of the minimum air gap width value.

Abstract: A rotor, which is cylindrically formed of a magnetic body and in which a plurality of magnet embedding holes are annularly formed at predetermined intervals in a circumferential direction, plate-like permanent magnets being embedded in the magnet embedding holes, includes a flux barrier that is disposed toward an outer circumference of the rotor from an circumferential end of each of the magnet embedding holes, and a slit that is disposed to be adjacent to the flux barrier, in which the slit is a long hole extending in a direction of becoming distant from the flux barrier, from an inner circumferential side of the rotor toward an outer circumferential side thereof, and a notch portion is provided on the outer circumference of the rotor opposing the flux barrier in a diameter direction of the rotor.

Abstract: An electric machine of a motor vehicle, in particular of an adjustment drive or of a radiator fan, has a rotor which is mounted so as to be rotatable about a machine axis. The rotor has a number of permanent magnets which are arranged in the radial direction. Each permanent magnet has one side with a strong magnetic flux and one side with a weak magnetic flux in the tangential direction. When the permanent magnets are adjacent in the tangential direction, different sides are directed towards one another.

Abstract: A motor includes a stator having a winding, and a rotor. The rotor rotates by receiving a rotational magnetic field generated by drive current supplied to the winding. The winding includes a first winding and a second winding, the first and second windings both being excited at the same timing by the drive current. The first winding and the second winding are connected in series. The rotor includes a first pole section and a second pole section. The second pole section faces the second winding at the rotation position of the rotor at which the first pole section faces the first winding. The magnetic force exerted on the stator by the second pole section is weaker than that exerted by the first pole section.

Abstract: A brushless direct current motor and a dual clutch transmission employing the motor are provided. The motor includes a stator including stator core and a winding wound around the stator core, and a rotor rotatable relative to the stator. The rotor includes a shaft, a rotor core fixed to the shaft, and a plurality of permanent magnets. The rotor core is fixed to the shaft and includes a plurality of accommodations arranged along a circumferential direction of the rotor. Each of the accommodations substantially extends along a radial direction and an axial direction of the rotor. The permanent magnets are respectively arranged at corresponding accommodations. A relationship of an axial length Lr of the rotor core, an axial length Lm of each of the permanent magnets, and an axial length Ls of the stator core is Lm>Lr?Ls.

Abstract: An electric motor includes a stator and a rotor including a permanent magnet and an electromagnetic steel sheet. The electromagnetic steel sheet includes a magnet insertion hole, a first outer peripheral surface including an inter-pole part of the rotor, a second outer peripheral surface including a magnetic pole center part of the rotor, a first slit elongated in a circumferential direction of the rotor, and a first portion formed between the first slit and the magnet insertion hole. A distance from the first outer peripheral surface to the stator is larger than a distance from the second outer peripheral surface to the stator. The electric motor satisfies ?a<?b, where ?a is a first angle formed by a first line and a second line and ?b is a second angle formed by a third line and the second line.

Abstract: A rotor core includes first and second laminate steel plates extending in a radial direction with respect to a central axis. The first laminate steel plate includes a first base portion positioned on a radially outer side of the central axis, and pieces separately positioned on a radially outer side of the first base portion with penetrating portions therebetween, and disposed at predetermined intervals in a circumferential direction. The second laminated steel sheet includes a second base portion positioned on a radially outer side of the central axis, and annular portions separately disposed on a radially outer side of the second base portion with penetrating portions therebetween, and extending in a circumferential direction. The rotor core is defined by the first laminate steel plates and at least one of the second laminate steel plates laminated in an axial direction.

Abstract: A permanent-magnet-embedded electric motor for a compressor includes a stator core and a rotor. The rotor includes a rotor core including a plurality of magnet insertion holes, and an end plate disposed on an end portion of the rotor core in an axial direction of the rotor core. An outer diameter of the end plate is equal to an outer diameter of the rotor core. The end plate is formed of a magnetic material that is more ferromagnetic than a magnetic material of the rotor core. A plurality of through-holes each communicating with corresponding one of the magnet insertion holes are formed in the end plate, the through-holes extending in the axial direction of the rotor.

Abstract: An electric machine includes an electrical steel rotor having openings defining magnet pockets and outer side pockets, and having spaced apart axial stripes of increased compressive residual stress layers around a perimeter thereof. The outer side pockets and the perimeter form top bridges therebetween. Each of the axial stripes is aligned with one of the top bridges to strengthen outer edges of the top bridges.

Abstract: A rotor includes: cylindrical rotor core blocks fixed to the rotary axis to be adjacent in an axial direction, the rotor core blocks including insertion portions disposed at intervals in an end surface in the axial direction so as to extend in the axial direction, and slots disposed at intervals in a circumferential direction so as to extend in the axial direction, the insertion portions of adjacent rotor core blocks facing each other and being successive to each other, and the slots facing each other and being successively each other; fixing pins having elasticity in an orthogonal planar direction orthogonal to the axial direction, the fixing pins being inserted to the insertion portions facing each other in the axial direction to fix the rotor core blocks to be adjacent in an axial direction; and magnets disposed in the slots to extend across the rotor core blocks.

Abstract: A method for manufacturing for an electrical machine includes: stacking a plurality of rotor laminations to form an axial rotor segment, the rotor segment formed of at least two laminations, each lamination having a plurality of openings therein, the openings forming a plurality of rotor poles in the rotor segment, each pole having a plurality of passages formed from the openings; rotating the rotor segment to place a first pole of the plurality of poles in an alignment position; injecting into the passages of the first pole a polymer bonded permanent magnet (PBM) material in molten form, wherein the (PBM) material includes magnetic particles suspended within a polymeric matrix; subjecting the first pole to a desired magnetic field to align the magnetic particles into a desired orientation prior to solidification of the (PBM) material; and solidifying the (PBM) material to form permanent magnets within the passages of the first pole.

Abstract: A rotor core is configured by stacking a plurality of core plates each including: an inner peripheral side core portion; an outer peripheral side core portion; a magnet insertion hole; a radial connection portion to be connected to the inner peripheral side core portion; a circumferential connection portion to be connected between the outer peripheral side core portion and the radial connection portion, including a minimum width portion having a width smaller than widths at both ends, and having a width smoothly decreasing from both ends toward the minimum width portion; and a thin portion including a uniform thickness portion which is provided in the circumferential connection portion and which has a uniform thickness and a non-uniform thickness portion which is adjacent to the uniform thickness portion and which has an increasing thickness, the thin portion having the minimum width portion within the uniform thickness portion.

Abstract: According to one embodiment, a rotor includes a shaft and a rotor core. A plurality of flux barriers are formed at the rotor core. The flux barrier has a plurality of bridges, and one or more barrier regions. When a width of the bridge of a first flux barrier is defined as wa, a width of the bridge of a second flux barrier is defined as wb, a value obtained by dividing a radius of a smallest circle that is tangent to a central line of the first flux barrier by an outer radius of the rotor core is defined as a, and a value obtained by dividing a radius of a smallest circle that is tangent to a central line of the second flux barrier by the outer radius of the rotor core is defined as b, and when f(x)=(1?x{circumflex over (?)}2){circumflex over (?)}(3/2) and g(x)=(1?x{circumflex over (?)}3), a relationship of f(b)/f(a)?wb/wa?g(b)/g(a) is satisfied.

Abstract: An interior permanent magnet (IPM) rotor as a well as method for providing and a system that includes an IPM rotor is provided. The IPM rotor includes a rotor body that rotates around a central rotational axis, wherein the rotor body is a ferromagnetic core with a central axial bore and is included of a plurality of rotor segments, wherein each rotor segment corresponds to a pole of the IPM motor, and wherein at least one of the rotor segments of the plurality of rotor segments includes a spoke-type interior permanent magnet (IPM) disposed within the rotor body and extending radially outward from the central axial bore to an outer surface of the rotor body, and a curved interior permanent magnet (IPM) disposed within the rotor body and extending radially outward at an incline with respect to a radial plane extending through a center of the spoke-type IPM.

Abstract: The invention relates mainly to a rotary electrical machine comprising a rotor (10) provided with a body (12) with an axis (X), the rotor body (12) comprising a plurality of longitudinal cavities (16) each designed to receive at least one permanent magnet (13); magnetic poles each formed by the permanent magnets (13) accommodated in two adjacent cavities (16) forming a “V” on a plane (P) orthogonal to the axis (X) of the rotor body (12); the rotor (10) comprising at least one part (35) for retention of the permanent magnets (13) in the cavities (16), characterised in that the retention part (35) comprises two elongate strips (36), each strip (36) comprising at least one boss (37) which is designed to apply a force of retention of the corresponding permanent magnet (13) in the cavity (16), and in that the retention part (35) additionally comprises at least two connection arms (40) between the two strips (36), with the boss (37) extending axially between the two connection arms.

Abstract: The invention relates to a method and to an arrangement for adjusting the magnetization of a permanent magnet machine, i.e. the magnetic flux induced by permanent magnets of a rotor in a stator, i.e. the air gap flux. According to the invention, the air gap flux is adjusted by adjusting the leakage flux of the permanent magnet.

Abstract: A motor includes a stator, a rotor including a rotor core having a magnet insertion hole, and a plurality of permanent magnets disposed in the magnet insertion hole of the rotor core and having two permanent magnets adjacent to each other. The rotor core has a first magnet holding portion in the magnet insertion hole, and a second magnet holding portion at an end of the magnet insertion hole in a circumferential direction. The rotor core has a plurality of electromagnetic steel sheets stacked in an axial direction. Relationships A>B and A>C are satisfied, where a number of the plurality of electromagnetic steel sheets is represented by A, a number of electromagnetic steel sheets having the first magnet holding portions is represented by B, and a number of electromagnetic steel sheets having the second magnet holding portions is represented by C.

Abstract: A rotor structure for an interior permanent magnet electric motor comprising: A laminated rotor core which comprises stack of thin plates, the stack having a first end and a second end, each plate in the stack including at least one window which is aligned with a corresponding window of an adjacent plate so that the window together form an elongate pocket that extends along at least a part of the length of the core starting at a first end of the core, and at least one permanent magnet located in the pocket. At least one plate at the first end of the stack includes an integral retention feature which projects away from a main body of the plate to project above the window in the plate and which engages the first end of the magnet thereby to retain the magnet in the pocket.

Abstract: An electric motor including a rotor including magnetic pole units and a stator including slots facing an outer peripheral surface of the rotor. Each of the magnetic pole units is bulged to an outside in a radial direction so that a waveform of a magnetic flux density generated from the rotor is a sine wave shape, and a concave part or convex part which is small enough to prevent changing of a waveform cycle of cogging torque determined by a least common multiple of the number of slots and the number of magnetic poles of the rotor, is formed at a central part in a circumferential direction of an outer peripheral surface in each of the magnetic pole units.

Abstract: A rotating electric machine, which can achieve improvement of a reluctance torque, reduction of stress and improvement of a power factor at the same time, and can also realize high output, and an electrically driven vehicle having the rotating electric machine are provided. A permanent magnet is arranged on a q-axis that connects magnetic poles of a rotor; a gap is formed in a radial direction of the permanent magnet; another permanent magnet is arranged facing the said permanent magnet so that these permanent magnets may sandwich a d-axis which connects centers of the magnetic poles; and another gap is formed at a position corresponding to a position of the said gap.

Abstract: A high-efficient magnetic rotating apparatus and motor generator are provided which are capable of further reducing a detent torque. The magnetic rotating apparatus and the motor generator each includes a stator in which cores with a winding are disposed and a rotor in which permanent magnets are disposed. The permanent magnet has a magnetic pole of an N-pole or an S-pole and has a counter face, opposed to the core, with an inclination angle. In each set of magnet bodies, the two permanent magnets are so disposed that two counter faces have different magnetic poles and are inclined reversely. The two permanent magnets are magnetically connected through a joint member made of a magnetic material so that the two counter faces act as magnetic poles on both ends of the magnet body.

Abstract: A rotor is and a motor including the rotor and a stator are provided. The rotor includes a rotor core and rotor poles. The rotor poles are arranged circumferentially around the rotor core, and each of the rotor poles is formed in an asymmetric shape. The stator is spaced apart from the rotor and includes slots which are configured so that a coil may be wound around the slots.

Abstract: The disclosure may generally relate to a motor which may include a rotor core which may include a first rotor lamination portion and a second rotor lamination portion. At least one magnet may be operably coupled to the first rotor lamination. The first rotor lamination may be in contact with the at least one magnet and the second rotor lamination may not be in contact with the at least one magnet. Additionally, the first rotor lamination and the second rotor lamination may be comprised of different materials.

Abstract: A rotor core is manufactured by forming thin plate-like core pieces including holes, forming a lamination body including insertion holes by laminating the core pieces, and inserting and embedding a permanent magnet in each of the insertion holes of the lamination body. The holes of each core piece include one or more first holes, in each of which a position determining portion for determining the position of the permanent magnet is formed, and one or more second holes, in which a position determining portion is not formed. Each insertion hole of the lamination body is formed by overlapping first holes of some of the core pieces and second holes of the remaining core pieces.

Abstract: A permanent magnet rotor comprises a rotor body configured for rotating around a central rotational axis and further comprises principal permanent magnets that are substantially rectangular in axial cross-section and are embedded in the rotor body and are arranged inclined with respect to the radial plane extending through the center of the principal magnets and such as to have a circumferential magnetic orientation. The principal magnets have an inner end and an outer end, the outer end being arranged in the proximity of the air gap of the outer circumference of the rotor, and outer bridges of magnetically conductive material being formed between the outer ends of the principal magnets and the outer circumference of the rotor. Auxiliary magnets are arranged near the outer ends of the principal magnets to magnetically saturate the outer bridges.

Abstract: A rotor, in particular a permanent magnet rotor, for an electrical machine, with a magnet carrier arranged concentrically with an axis of the rotor, wherein the magnet carrier has protrusions on its outer face, a number of magnets arranged on the outer face of the magnet carrier, which are arranged in the peripheral direction of the magnet carrier side-by-side and spaced apart from one another on the magnet carrier, wherein the magnets in each case are arranged between the protrusions, and plastic, which in each case is arranged between the magnets and at least partially encloses the protrusions.

Abstract: A first rotor core including a plurality of gaps penetrating through the first rotor core along an axial direction is provided. A second rotor core being in contact with an axial end of the first rotor core and having a plurality of magnet-housing slots facing the gaps is also provided. The gaps have a magnetic resistance lower than that of the magnet-housing slots.

Abstract: An interior permanent magnet machine includes a rotor having a plurality of slots. First and second slots are disposed in a first pole and the third and fourth slots are disposed in a second pole. A first angle is defined between respective centerlines of the first and second slots. A second angle is defined between respective centerlines of the third and fourth slots. The first angle is configured to be sufficiently different from the second angle so that torque ripple is reduced. Thus the rotor is configured such that the angular configuration of slots in a first pole is different from the angular configuration of slots in a second pole of the rotor.

Abstract: A rotor (2) for an electric motor, which rotor (2) includes a plurality of laminated rotor sheets (4) arranged in layers and each provided with slots (6, 10); a number of permanent magnets (8) arranged within magnet slots (10) in the laminated rotor sheets (4), where an end area (16) of each magnet slot (10) is a magnet free area. The rotor (2) also includes a plurality of rotor bars (14) arranged in rotor bar slots (6) and a rotor sheet band (22) provided between the end area (16) and the adjacent rotor bar slot (6). At least one notch (28, 29) extending from the edge (21) of the rotor bar slot (6) and/or from the edge (21?) of the end area (16) divides the rotor sheet band (22) into a first area (24) and a second area (26). The smallest width (D1) of the first area (24) is smaller than the smallest width (D2) of the second area (26).

Abstract: A rotor stack of an electric motor may include a gap for insertion of at least two permanent magnets of an individual magnet pole. The gap may include a central connecting element and at least two side connecting elements, which mechanically connect an inner part and an outer part of the rotor stack, so that the at least two side connecting elements define an air barrier having a form of a polygon. The air barrier in an outer corner of the gap may extend to at least two side of a respective one of the at least two permanent magnets. According to an implementation, the respective permanent magnets may be configured as a cuboid.

Abstract: The present application relates to a rotor (1) for an electrical machine. The rotor (1) comprises at least one substantially cylindrically shaped ferromagnetic base element (2). Said ferromagnetic base element (2) includes a multitude of posts (3, 3.1, 3.2) radially extending therefrom, each of said posts (3, 3.1, 3.2) being bordered by at least a first lateral surface (4) and a second lateral surface (5), wherein recesses (7) are defined between each pair of neighbouring posts (3, 3.1, 3.2). One ferromagnetic intermediate member (13) is arranged in each recess (7) between each pair of posts (3, 3.1, 3.2). Each ferromagnetic intermediate member (13) is affixed to the first lateral surface (4) of a first post (3.1) and to the second lateral surface (5) of a second post (3.2) of each pair of posts (3, 3.1, 3.2) by means of at least one permanent magnet (6, 6.1, 6.2), respectively, said permanent magnets (6, 6.1, 6.2) being each oriented such that the same pole faces said ferromagnetic intermediate members (13).