Abstract: A rotor core for a rotary electric machine, includes: a shaft hole into which a shaft rotating about a rotation axis is inserted and fixed; an inner ring portion provided with the shaft hole therein and having an outer edge in a circular shape coaxial with the rotation axis; an outer ring portion coaxial with the rotation axis and disposed radially outward of the inner ring portion; a connection ring portion coaxial with the rotation axis and disposed between the inner and outer ring portions; inner ribs interconnecting the inner and connection ring portions and extending in a crossing direction to the rotation axis; and outer ribs interconnecting the connection and outer ring portions and extending in the crossing direction. The inner and outer ribs are disposed respectively in different phases in a peripheral direction of the connection ring portion.

Abstract: A permanent magnet motor includes a rotor having a field pole of a rotor core, wherein the field pole has a radius smaller than an arc centered on a shaft of the rotor, a multiple of slits are formed in the field pole, the multiple of slits are disposed so that an interval between a first central line positioned between a multiple of the slits and a second central line positioned between a neighboring multiple of the slits increases as the first central line and the second central line head toward an outer peripheral side of the rotor core, and of the multiple of slits of the field pole, a first slit disposed in a central position of the field pole, and a second slit and a third slit disposed on either side of the first slit, are disposed within 20% of a circumferential direction width of the permanent magnet.

Abstract: A motor includes a rotor rotatable in a rotating direction about an axis, and a stator surrounding the rotor. A rotor core includes a magnet insertion hole corresponding to one magnetic pole, and a plurality of slits on an outer side of the magnet insertion hole in the radial direction. The slits include a first slit located most upstream in the rotating direction. Each slit has a tip portion and a root portion. The tip portion of the first slit is located upstream of the root portion of the first slit in the rotating direction, and is located upstream of a magnetic pole center in the rotating direction. The root portions of the slits are disposed more in number in a second region downstream of the magnetic pole center in the rotating direction than in a first region upstream of the magnetic pole center in the rotating direction.

Abstract: The present invention discloses a motor rotor and a permanent magnet motor. The motor rotor includes a rotor core and a plurality of magnetic poles provided in the rotor core, wherein each magnetic pole includes a first permanent magnet, a second permanent magnet and a third permanent magnet; the first permanent magnet being arranged on a central position of the magnetic pole on which said first permanent magnet is located, the second permanent magnet being arranged at two sides of the first permanent magnet, the third permanent magnet being arranged at one side of the second permanent magnet far away from the first permanent magnet; the coercivity of the first permanent magnet is smaller than that of the second permanent magnet and that of the third permanent magnet; and the third permanent magnet is arranged on a q axis of the motor.

Abstract: A rotor structure of a motor includes a rotor core formed by laminating a plurality of laminated steel plates, a permanent magnet, and end plates. First holes and second holes are perforated alternately in a circumferential direction at equal intervals. The end plates have holes. The end plates are respectively fixed to end portions of the rotor core by fastening members inserted to the holes and the first holes. When the rotor core is divided into first laminated portions and a second laminated portion, in the second laminated portion, the plurality of the laminated steel plates adjacent to the first laminated portions are rotationally laminated in such a manner that the second holes are connected to the first holes.

Abstract: A virtual circle included in the through-hole as viewed from the axial direction is assumed in the through-hole. An inner peripheral surface of the through-hole includes a first side that is located on a radial inside with respect to the virtual circle and extends along the circumferential direction, a second side that is located on one side in the circumferential direction with respect to the virtual circle and extends along the radial direction, and a third side that is located on another side in the circumferential direction with respect to the virtual circle and extends along the radial direction. The second side and the third side contact with the virtual circle. The first side extends linearly or extends radially outward in a curved manner when viewed from the axial direction.

Abstract: A rotor includes: a rotor core having: a rotor shaft hole; and a plurality of magnet insertion holes; and a plurality of magnetic pole portions. The rotor core includes a plurality of refrigerant flow passage hole portions. A refrigerant flow passage hole portion includes: a first refrigerant flow passage hole located on a virtual line connecting a circumferential center of each magnetic pole portion and a center of the rotor core; and a pair of second refrigerant flow passage holes facing each other across the first refrigerant flow passage hole on both circumferential end portion sides of each magnetic pole portion. The first refrigerant flow passage hole and the pair of second refrigerant flow passage holes include inner radial side apex portions protruding radially inward. Outer peripheral walls of the pair of second refrigerant flow passage holes include outer radial side apex portions protruding radially outward.

Abstract: A motor includes an annular core formed by stacking a plurality of electromagnetic steel sheets; end plates disposed at both ends of the core in an axial direction; a balance weight disposed on a side of one of the end plates, the side being opposite the core; and a spacer disposed between the one of the end plates and the balance weight, the spacer being configured to create a space between the one of the end plates and the balance weight. The motor is entirely fastened by allowing at least one of a plurality of rivets arranged in a circumferential direction of the core to pass through the core and the end plates in the axial direction, and allowing remaining at least one rivet to pass through the core, the end plates, the spacer, and the balance weight in the axial direction.

Abstract: A rotor for a rotating electrical machine, the rotor including: a rotor core having a plurality of magnetic poles; and a plurality of permanent magnets arranged in the rotor core, wherein: in each of the plurality of magnetic poles, the rotor core has a plurality of holes including a first hole and a second hole in each of which a respective permanent magnet of the plurality of permanent magnets having a planar magnetic pole surface is arranged.

Abstract: A rotor sheet includes a central cut-out and is divided into a plurality of sectors, each including a first half sector and a second half sector delimited from the first half sector by a radial central line, wherein a through-opening configuration, which has two parallel edge lines extending along an extension direction, is formed inside the first half sector, and a further through-opening configuration, mirror-symmetrical to the through-opening configuration with respect to the central line, is formed inside the second half sector, wherein the first through-opening configuration includes a relief through-opening inscribed inside an incircle-free trapezoid having two bases extending parallel to the central line and two legs extending on a first straight line having a first angular spacing from the central line, and on a second straight line having a second angular spacing from the central line, wherein the first and second straight lines intersect at an acute angle.

Abstract: A rotor core of a magnet-embedded electric motor includes a first tubular member and a second tubular member coaxially fixed to a shaft. The first tubular member includes a magnet fixing hole in which the magnet is fixed and a recess formed in an outer circumferential surface. The second tubular member includes a magnet fixing hole in which the magnet is fixed. The magnet fixing hole includes an arrangement region where the magnet is arranged, and an escape region having a size that allows magnet fixing agent to accumulate. The arrangement region of the first tubular member communicates with the arrangement region of the second tubular member, and the recess of the first tubular member communicates with the escape region of the second tubular member.

Abstract: Provided is a permanent magnet motor, comprising a rotor component and a stator component. The rotor component comprises alternating poles and permanent magnet poles alternately arranged in a circumferential direction. The stator component comprises stator teeth portions arranged and spaced apart in a circumferential direction on an inner circumferential side of the stator component. A first air gap is formed between an inner circumferential side of the stator teeth portion and an outer circumferential side of the permanent magnet pole. A second air gap is formed between the inner circumferential side of the stator teeth portion and an outer circumferential side of the alternating pole. An average thickness of the first air gap is ?1; an average thickness of the second air gap is ?2, wherein 0.4??2/?1?0.9.

Abstract: An interior permanent magnet motor includes a stator provided with a plurality of slots and a rotor rotatably disposed inside the stator. A plurality of permanent magnets of the same polarity are disposed at equal intervals in a circumferential direction inside the rotor. A plurality of flux bathers are provided on left and right sides of one end of each of the plurality of permanent magnets adjacent to an outer circumferential surface of the rotor. A ratio of a number of slots of the stator to a number of magnetic poles of the rotor is 3:2 or 3:4. The number of permanent magnets provided in the rotor is ½ of the number of magnetic poles of the rotor.

Abstract: Rotors formed by an additive manufacturing process are presented. In one example, a method of making a rotor is presented including defining a printing order for the application of a first material, and creating a plurality of lobes arranged helically about a central opening or a shaft by adding a first material in the printing order, wherein each of the plurality of lobes defines an outer surface.

Abstract: According to one embodiment, a rotor of an electric rotating machine includes a shaft, a rotor core, and a plurality of permanent magnets. Two first permanent magnets are arranged in line symmetry with a pole center and are arranged gradually away from the pole center as the two first permanent magnets extend from first ends toward second ends thereof. Two second permanent magnets are arranged in line symmetry with the pole center and are arranged gradually away from the pole center as the two second permanent magnets extend from third ends toward fourth ends thereof. Angles ?1, ?2 are set to satisfy the relationships of ?1>?2, and 70 degrees??2?110 degrees.

Abstract: A rotor includes a rotor core and a magnet inserted into a magnet insertion hole formed in the rotor core. The magnet insertion hole extends in parallel with the rotation axis of the rotor core and, when viewed along the rotation axis, has an arcuate shape having a central portion projecting toward the rotation axis. The arcuate shape of the magnet insertion hole is formed such that the arcuate shape includes a first arcuate surface and a second arcuate surface that has a center identical to a center of the first arcuate surface and that has a radius larger than the radius of the first arcuate surface. The second arcuate surface includes two projections projecting toward the first arcuate surface. The magnet is inserted between the two projections and makes contact with the two projections.

Abstract: Disclosed are a rotor for an electric motor, an electric motor, and a compressor. The rotor includes: a rotor core (1), provided with a shaft hole (11) and four magnet grooves (12); and four permanent magnets (2), disposed in corresponding magnet grooves, each permanent magnet including a first surface (21) and a second surface (22). When viewed from a projection surface, the first surface has an arc segment (211), and the second surface has a plurality of straight segments connected in sequence. A thickness H of each permanent magnet on a corresponding magnetic pole centerline, a length L of the second surface projected on the projection surface, and a radius R of the rotor core satisfying the following relationships: 0.24?H/R?0.26 and 1.07?L/R?1.11.

Abstract: Each of a plurality of permanent-magnet pairs is configured with a pair of permanent magnets that are arranged in a v-shaped manner in such a way that the distance between the portions of the permanent magnets, facing each other at the outer side in the radial direction of the rotor core, is smaller than the distance between the portions thereof, facing each other at the inner side in the radial direction of the rotor core; a magnetic-field pole is formed of part, of the rotor core, that is situated between the adjacent permanent-magnet pairs.

Abstract: An interior permanent magnet motor assembly including a stator and a rotor is provided. The stator includes electromagnetic windings. The rotor is disposed concentrically with the stator about a rotor axis and the rotor has a plurality of rotor segments. The plurality of rotor segments may include a first rotor segment and a second rotor segment. The first rotor segment may have first pockets being arranged to receive at least a first magnet of a first magnet set according to a first rotor topology. The second rotor segment may be axially stacked relative to the first rotor segment about the rotor axis. The second rotor segment may be arranged to receive at least a second magnet of a second magnet set according to a second rotor topology having a configuration that is different than the first rotor topology.

Abstract: A rotor of a synchronous motor includes a rotor core that includes magnet insertion holes and a plurality of slits formed on an outer peripheral side of the magnet insertion holes, and permanent magnets embedded in the magnet insertion holes. Magnetic-path forming slits are formed at intervals in a direction along a side of the permanent magnet. Magnetic paths are formed between the magnetic-path forming slits and at portions on the outside of the magnetic-path forming slits on the outermost side. An adjusting slit is formed between a predetermined magnetic-path forming slit and the permanent magnet such that a difference between quantities of magnetic flux passing through the magnetic paths adjacent to each other for widths in a direction intersecting an orientation of a magnetic pole of the permanent magnet is small.

Abstract: A rotor of a rotary electric machine includes a rotor core of an approximately annular shape which has plural sets of plural magnet insertion holes arranged radially, the plural sets being arranged in a circumferential direction with a predetermined gap, and plural permanent magnets which are inserted into the magnet insertion holes, respectively. Each permanent magnet has a circular arc shape in a radial section, and a curved surface thereof is convex toward a rotation shaft of the rotor. Plural permanent magnets which are respectively inserted into the radially arranged plural magnet insertion holes in each set includes a first permanent magnet which is positioned on an outer circumferential surface side and a second permanent magnet which is positioned on a rotation shaft side and has a radial thickness equal to or larger than a radial thickness of the first permanent magnet.

Abstract: A hybrid rotor assembly is provided. The assembly utilizes two different types of magnets within the lamination cavities of the lamination stack: sintered permanent magnets and bonded magnets.

Abstract: A cage induction motor includes a rotor core that is rotatable about a central axis, and a shaft to which the rotor core is fixed. The rotor core includes an annular yoke and a plurality of spokes. The yoke supports at least one conductor. The plurality of spokes are arranged apart from one another in a circumferential direction of the yoke, are provided between the yoke and the shaft, and support the yoke.

Abstract: To provide a motor control method ensuring that dragging loss at the time of high rotation can be reduced. A motor control method, wherein a composite permanent magnet has a core part and a shell part, the Curie temperature of one of the core part and the shell part is Tc1 K, and the Curie temperature of another is Tc2 K, and wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at Ts K that is (Tc1?100) K or higher and lower than Tc2 K and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature Ts K or Tc1 K, whichever is lower.

Abstract: A rotor for a synchronous reluctance machine having an even number 2 p of poles circumferentially spaced at an angle ?, with ?=2 ?/2 p, the rotor comprising a substantially cylindrical laminate stack having a plurality of magnetically conductive laminations. One or more of the magnetically conductive laminations includes non-magnetic flux barriers which are spaced from each other in the radial direction, one or more of the non-magnetic flux barriers having a first and second bridge transversally positioned in correspondence of their lateral ends and defining a first and a second air-gap with the outer rim of the magnetically conductive lamination, and further including a third and a fourth bridge transversally positioned and respectively defining together with the first and second bridge a first and a second internal space which are filled with an electrically conductive and non-magnetically conductive material.

Abstract: A motor having an improved assembly structure of a rotor core and a magnet is provided. The motor comprising a stator and a rotor that rotates with respect to the stator. The rotor comprises a rotor core that is disposed rotatably with respect to a rotary shaft and has a plurality of magnet coupling apertures disposed apart from each other at a particular interval in a circumferential direction of the rotary shaft. Additionally, a magnet is inserted into the magnet coupling aperture and a plate is coupled to opposite end portions of the rotor core. The plate includes a magnet support portion that is configured to support the magnet.

Abstract: A rotor for a reluctance machine includes conductor layers and insulation layers arranged in alternation in the axial direction. The conductor layers have magnetic-flux-conducting conductor regions and the insulation layers are electrically insulating. To improve weight and efficiency of a reluctance machine, the rotor is produced at least partially by additive manufacturing.

Abstract: An armature includes a multi-phase armature coil and an armature core. The armature core includes a back yoke, a plurality of large-width teeth and a plurality of small-width teeth having a smaller circumferential width than the large-width teeth. The large-width teeth each radially protrude from the back yoke and are spaced from one another in a circumferential direction of the armature core. The large-width teeth have the armature coil concentratedly wound thereon. The small-width teeth each radially protrude from the back yoke and are spaced from one another in the circumferential direction of the armature core. The small-width teeth are arranged alternately with the large-width teeth in the circumferential direction of the armature core. Moreover, 1?W1/W2?2, where W1 is a radial width of the back yoke and W2 is the circumferential width of the small-width teeth.

Abstract: An electric machine, to a motor vehicle with such an electric machine, and to a method for operating such an electric machine. The electric machine includes at least one sliding contact which is formed by a slip ring connected to a rotor and by at least one brush and via which an operating current flows during an operation of the electric machine. A control unit is configured to control the operation of the electric machine. The control unit is configured to verify a predetermined operating criterion of the electric machine and, if said operating criterion is met, to inject a cleaning current according to a predetermined scheme, which then flows independently of the operating current via the sliding contact and cleans said sliding contact in order to maintain or improve a current transfer capability of the sliding contact.

Abstract: A permanent magnet rotor (1) with a magnetically conductive magnetic core (2), which has a plurality of magnet retainers (3, 4) for radially arranged and essentially tangentially magnetized permanent magnet parts (9), and a method for the production thereof. With a common permanent magnet rotor, the object of the present invention is to ensure a simple installation for a low number of components to be installed, very good magnetizability, high strength of the mechanical connection of the permanent magnet parts in the magnet retainers, and a compact size.

Abstract: A permanent magnet module for an electrical machine extending along an axial direction is provided. The permanent magnet module comprises a permanent magnet assembly comprising at least one permanent magnet and a base supporting at least part of the permanent magnet assembly and extending from a bottom adapted to be positioned on a rotor of an electrical machine to a top along a radial direction. The permanent magnet assembly further comprises a first inclined permanent magnet portion and a second inclined permanent magnet portion arranged outwardly inclined along the radial direction and a tangential permanent magnet portion arranged substantially perpendicular to the radial direction.

Abstract: A brushless motor includes a stator including teeth each including a constricted portion on which a coil is to be wound, and a tip end portion including a confronting surface that faces a rotor and having a width greater than that of the constricted portion. A spacer includes closure members disposed between adjacent ones of the tip end portions, and fitted to the teeth so that the confronting surfaces of the teeth are exposed toward the rotor.

Abstract: A permanent magnet machine includes a rotor including a rotor hub and a plurality of permanent magnets embedded in the rotor in a circumferential pattern. The rotor includes a respective bridge between each circumferentially adjacent pair of the permanent magnets. Each bridge is of a different material than that of the rotor hub, and the rotor hub and bridges are integral with one another.

Abstract: A rotor has reduced weight. A hammer drill includes a motor including a stator and a rotor rotatable relative to the stator. The rotor includes a rotor core having a first space, and a permanent magnet fixed on the rotor core.

Abstract: In an electric motor, a first magnet and a second magnet are accommodated in magnet accommodating apertures of a rotor core. On outer circumferential core portions that exist on a radially outer side of the magnet accommodating apertures, two slits as a pair of first slits, and two slits that are respectively adjacent to each of the first slits are disposed circumferentially outside the pair of first slits as a pair of second slits. The outer circumferential core portions include: a first magnetic portion that exists between the pair of first slits; and a pair of second magnetic portions that respectively exist between the first slits and the second slits. An inter-magnet space portion that exists between the first magnet and the second magnet is positioned within a range of the first magnetic portion in the circumferential direction of the rotor.

Abstract: A permanent magnet motor, comprising a stator (1) and a rotor (4); the rotor comprises a rotor iron core (5) and permanent magnets (7a, 7b); in the radial direction of the rotor, each magnetic pole of the rotor iron core is provided with multiple layers of arc-shaped permanent magnet grooves (6a, 6b); a q-axis magnetic flux path is formed between two neighboring magnetic poles; the permanent magnets are disposed in the permanent magnet grooves; two neighboring magnetic poles of the rotor are respectively a first magnetic pole and a second magnetic pole having opposite polarities; an outer endpoint of a permanent magnet in the first magnetic pole is a first outer endpoint, said outer endpoint is farther from the q-axis; an outer endpoint of the permanent magnet in the second magnetic pole is a second outer endpoint, said outer endpoint is farther from the q-axis; an included angle A of the first outer endpoint and the second outer endpoint with respect to the center of the rotor is less than an electrical angl

Abstract: An electrical machine, in particular a synchronous reluctance motor, having a rotor having a number of similar permanent magnets, each of which is disposed in each case in an associated pocket of the rotor. Permanent magnets adjacent in a tangential direction can be installed only in one position in the respective pocket, in which the magnetization directions is rotated by 180° with respect to a radial straight line associated with the respective permanent magnet. A rotor of an electrical machine is also provided.

Abstract: A rotor mechanism includes a plurality of rotor bars and a rotor core. The rotor bars are disposed along the edge of the rotor core. The rotor core has a plurality of magnetic flux-barrier units and at least one flux channel. Each magnetic flux-barrier unit extends from one of the rotor bars to another rotor bar. The flux channel passes through the flux-barrier units and surrounds an axis of the rotor core, wherein each magnetic flux-barrier unit is a magnetic flux barrier, and the area between the adjacent magnetic flux-barrier units and the flux channel are pathways for magnetic flux.

Abstract: A compressor is configured such that an axis center of a rotating shaft for transmitting rotation of a rotor to a compressing unit for compressing a refrigerant is offset from a rotor center of the rotor, and, when the rotor is divided into, with respect to the rotor center, a first portion located on a side in a direction from the axis center to the rotor center and a second portion located on a side in a direction from the rotor center to the axis center, a magnetic force of the first portion is stronger than a magnetic force of the second portion. This configuration allows the rotor to generate non-uniform magnetic attractive forces during the rotation of the rotor and thereby can suppress vibration generated due to rotation of an eccentric portion of the compressing unit and reduce noise.

Abstract: Provided are a rotor of a rotary electrical machine, a rotary electrical machine, and a vehicle, which enable mitigation of stress concentration generated in a magnet insertion hole of a rotor core and high-speed rotation. A rotor 250 of a rotary electrical machine includes: a rotor core 252 including a plurality of magnet insertion holes 253 for each magnetic pole; and permanent magnets 254 inserted into the magnet insertion holes, in which a bridge portion 260, which mechanically connects a rotor core portion 256 on the outer circumferential side of the magnet insertion holes 253 and a rotor core portion 263 on the inner circumferential side of the magnet insertion holes 253, is provided between the adjacent magnet insertion holes, and the bridge portion 260 has two inflection points 266a and 266b on the outer circumferential side of the bridge portion 260.

Abstract: Magnet slot includes a permanent magnet insertion portion and air regions that is formed at both circumferential direction ends of the permanent magnet insertion portion. The air region includes a first circumferentially extending portion that extends from a circumferentially end portion of the permanent magnet insertion portion to a circumferentially outer side, a radially extending portion that extends from the first circumferentially extending portion to a radially inner side, and a second circumferentially extending portion that extends from the radially extending portion to a circumferentially inner side until reaching between the radially inner peripheral surface of the permanent magnet insertion portion and the shaft hole. A radially inner end surface of the radially extending portion and a radially inner end surface of the second circumferentially extending portion are made up of a portion of a circular arc in contact with the circumferentially outer side surface of the radially extending portion.

Abstract: The present invention is to provide a rotor capable of further increasing curvature of a permanent magnet while absorbing strain in the permanent magnet. A rotor having an embedded magnet type structure includes a rotor core having a plurality of slots disposed in a circumferential direction and a plurality of magnet parts respectively stored in the plurality of slots.

Abstract: A synchronous machine with flux concentration. The synchronous machine enables improved torquing characteristics with a simple structure in that at least one additional permanent magnet is provided in the rotor and/or stator, whose generated magnetic flux is at least partially returned via the flux guide regions of the rotor, wherein the magnetic flux of the additional permanent magnet in the flux guide regions of the rotor has a direction opposite to the magnetisation direction of the permanent magnets of the rotor.

Abstract: A rotor of a rotating electric machine includes a rotor core, and a plurality of permanent magnets arranged in a two-layer structure having a first layer and a second layer, in the rotor core. Among the permanent magnets, first and second outermost permanent magnets located closest to each of opposite q-axes of each magnetic pole are located relative to each other, such that a radial position of an end portion on a q-axis side and a radially inner side in the first outermost permanent magnet that belongs to the first layer is spaced by a predetermined radial spacing from and is on a radially outer side of a radial position of an end portion on the q-axis side and a radially outer side in the second outermost permanent magnet that belongs to the second layer.

Abstract: There is provided a rotor for a rotary electric machine including a rotor core of an approximately annular shape having a plurality of magnet inserting holes formed at predetermined intervals in a circumferential direction thereof, and a plurality of permanent magnets inserted into the magnet inserting holes. A rotor yoke on at least an outer circumferential side relative to the magnet inserting holes of the rotor core is formed of a magnetic material. The outer circumferential side relative to the magnet inserting holes of the rotor core has a hole portion approximately on a d-axis of each magnetic poles formed by the permanent magnets.

Abstract: A rotor for a rotating electric machine includes a hollow cylindrical rotor core and a plurality of permanent magnets. The rotor core has a plurality of magnet-receiving holes arranged in a circumferential direction thereof. The permanent magnets are received respectively in the magnet-receiving holes of the rotor core to form a plurality of magnetic poles the polarities of which alternate between north and south in the circumferential direction of the rotor core. Moreover, the rotor core further has a plurality of q-axis core portions each of which is located between one circumferentially-adjacent pair of the magnetic poles. For each of the q-axis core portions, a radially outer circumferential width center of the q-axis core portion is offset upstream in a direction of rotation of the rotor from a radially inner circumferential width center of the q-axis core portion.

Abstract: The present invention provides a permanent magnet unit in which insulating layers are located at positions where an eddy current can be reduced most effectively. The permanent magnet unit includes at least one insulating layer, and a plurality of permanent magnet pieces located adjacent to each other with the at least one insulating layer in between. The at least one insulating layer is located at positions defined based on a magnitude of an eddy current flowing inside a permanent magnet, corresponding to a change in a magnetic field of the permanent magnet into which a plurality of the permanent magnet pieces are integrally formed without the at least one insulating layer.

Abstract: An IPM electric machine includes a rotor, rotor shaft stator, and permanent magnets. The rotor includes rare earth permanent magnets disposed within pockets. The rotor, the pockets and the permanent magnets conform to a first set of geometric design parameters. The stator includes radially-inwardly projecting teeth that form slots between pairs of the teeth. Electrical windings are disposed within slots of the laminate stack. The teeth and slots conform to a second set of geometric design parameters. The quantity of slots is between 60 and 96, the quantity of electrical poles is between 6 and 12, the quantity of electrical phases is between 3 and 6 and the electrical windings include a quantity of turns per phase that is between 8 and 20. A ratio of an outer diameter of the stator to an active length of the rotor is between 2 and 3.5.

Abstract: The disclosure relates to a rotor for a permanently excited electric machine. The rotor includes a holding pocket which is formed by a cutout of the rotor and which is designed to receive a permanent magnet. At least one flexible limb projects into the holding pocket of the rotor, and is designed to form an interference fit together with a circumferential boundary of the holding pocket and the permanent magnet arranged between the at least one flexible limb and the circumferential boundary.

Abstract: An electric machine includes a unitary, single material substrate defining a rotor lamination including a first region having a predefined magnetic permeability. The rotor lamination includes an arc-shaped second region having a magnetic permeability less than the first region. The second region is oriented such that it impedes flux associated with magnets contained by the first region and perpendicular to quadrature flux field lines associated with the magnets.