Abstract: A first shaft member of a shaft included in this rotor includes: a first large-diameter portion disposed radially inward of a rotor core; and a first small-diameter portion disposed on a first axial side relative to the rotor core. The first small-diameter portion is provided with a driving force transmitter to transmit a driving force, which is transmitted thereto from the rotor core, to a driving force transmission member. A portion of the first shaft member located on a second axial side is connected to a second shaft member of the shaft.

Abstract: A stator core that is configured by stacking plural core plates and that is housed inside a case of a motor. The plural core plates include an elastic protrusion-equipped core plate provided with plural elastic protrusions arrayed in a circumferential direction. The elastic protrusions extend toward a radial direction outside from an outer peripheral portion of the elastic protrusion-equipped core plate and are bent in an axial direction. The stator core is supported by the case in a state in which the plural elastic protrusions are in contact with an inner peripheral face of the case and elastically flexed.

Abstract: The invention relates to an electric motor comprising a stator (A) with an insulation, a rotor, and an electronics and/or terminal housing (1) comprising a bottom (4), in which electrical/electronic components provided for the operation of the electric motor are housed. The electronics and/or terminal housing (1) is permanently connected to the stator (A) by means of an overmould (17b) so as to form a stator unit, the bottom (4) of the electronics and/or terminal housing (1) being at least partially covered by the overmould (17b) on its upper side. The overmould is not only provided for the stator, but is used at the same time as a connection means for connecting the electronics and/or terminal housing to the wound stator. Additional connection parts are not required as a result. The stator packet is first wound and then inserted into an injection mould with the electronics housing (1). Then, a heat-conductive, electrically insulating plastic is used to form the overmould (17b).

Abstract: An driving motor with hybrid excitation of electromagnetism and invisible magnetic pole, wherein each magnetic pole comprises two first magnets, one second magnet and one third magnet; wherein the first magnet is placed along a diameter direction of a rotor core, the second magnet is located at a middle and lower portion of two first magnets of each magnetic pole corresponding to the second magnet at a diameter direction, and a magnetic isolation groove is disposed at an inner end of the first magnet and extends toward two sides of the inner end of the first magnet. The magnetic isolated air gap can adjust a spatial distribution of a magnetic field generated by permanent magnets of each pole to replace the permanent magnets, so as to save the number of the permanent magnets, reduce the weight of the motor, and reduce the cost of the motor.

Abstract: An aircraft motor includes a bearing assembly including a first plurality of rotor alignment magnets; a magnet support structure fixedly mounted on a shaft of the motor in a spaced apart relation to the bearing assembly, the magnet support structure including a second plurality of rotor alignment magnets such that when the vertical thrust engine is disengaged, attraction between the first and second rotor alignment magnets causes the magnet support structure to rotate relative to the bearing assembly to an alignment position defined by the relative placement of north and south poles of the first and second plurality of rotor alignment magnets.

Abstract: A rotor unit for a brushless electric motor, incudes an annular rotor core surrounding a central axis, a plurality of magnet arrangements that are arranged around the rotor core in a circumferential direction of the rotor and that each have a convex outer peripheral face, an inner contact face, two axial end faces and two side faces pointing in the circumferential direction, a magnet holder having a number of holding portions which are each arranged between two adjacent magnet arrangements and are moulded onto a ring portion of the magnet holder. The holding portions are configured T-shaped in a cross section along a plane running transversely to the central axis and each have a shank portion and a head portion. The shank portion lies on the side faces of the magnet arrangements in a contact region and the head portion lies on the peripheral faces of the magnet arrangements.

Abstract: The present disclosure provides a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric car. The rotor structure includes: a rotor body opened with a group of permanent magnet slots, wherein the group of permanent magnet slots include an inner-layer permanent magnet slot and an outer-layer permanent magnet slot which are arranged at intervals outwards along a radial direction of the rotor body; an inner-layer permanent magnet disposed within the inner-layer permanent magnet slot; an outer-layer permanent magnet disposed within the outer-layer permanent magnet slot, wherein the inner-layer permanent magnet and the outer-layer permanent magnet are arranged staggeredly.

Abstract: A rotor capable of suppressing cogging torque and heat build-up caused when an electric motor is operated. The rotor includes a sleeve fixed to a radially outside of a rotary shaft, a plurality of magnets disposed around a radially outside of the sleeve, and a reinforcing member having a cylindrical shape that surrounds the plurality of magnets while being in contact with an outer surface of each of the plurality of magnets to hold the plurality of magnets with the sleeve, each of the plurality of magnets including a central portion in a circumferential direction, in contact with the sleeve, and an end portion in the circumferential direction, having a thickness less than that of the central portion and forming a gap with the sleeve.

Abstract: The present invention may provide a motor including a shaft, a rotor disposed outside the shaft, and a stator disposed outside the rotor, wherein the rotor includes a rotor core surrounding the shaft and a magnet disposed inside the rotor core, the rotor core includes a pocket in which the magnet is disposed, the rotor core is formed by stacking a plurality of plates, a lower end plate of the plurality of plates is disposed to cover at least a part of the pocket, and an upper end plate of the plurality of plates is disposed at a level higher than a level of the magnet.

Abstract: An embodiment relates to a motor comprising: a shaft; a rotor which is coupled to the shaft; and a stator which is disposed outside the rotor, wherein the rotor comprises a first can, a rotor core which is at least partially disposed in the first can, a plurality of magnets which are coupled to the rotor core, and a second can in which another portion of the rotor core is disposed, the plurality of magnets are spaced apart in the circumferential direction by a plurality of spacing spaces, the first can comprises a first plate portion, a first protrusion portion which is formed by bending at an edge of the first plate portion, and a plurality of first protrusions which are disposed on at least two of the plurality of spacing spaces and spaced apart from each other, the second can includes a second plate portion, a second protrusion portion which is formed by bending at the edge of the second plate portion, and a plurality of second protrusions which are disposed on at least two different spaces of the pluralit

Abstract: A rotor for an electrical machine, comprising a motor shaft and a distributed arrangement of permanent magnets on said motor shaft, which are secured against displacements in the axial direction of the rotor by a protector, wherein the protector comprises at least two annular segments.

Abstract: A rotor includes magnets, and a rotor core including thin film cores laminated in an axial direction and magnet holes in which the magnets are located. The rotor core includes first thin plate cores and second thin plate cores. The first thin plate cores include an annular first inner plate, first outer plates on a radially outer side of the inner plate and arrayed side by side in the circumferential direction, first inner connecting portions connecting the inner plate and the outer plate, and a first outer connecting portion that is on a radially outer side of the first outer plate and connects the adjacent outer plates in the circumferential direction.

Abstract: Disclosed is a rotor for an electrical machine includes a rotor hub comprising a multifaceted surface extending along a perimeter of the rotor hub. Each facet of the multi-faceted surface may have a substantially planar surface. A plurality of permanent magnet assemblies is disposed circumferentially around the multifaceted surface. Each individual permanent magnet assembly of the plurality of permanent magnet assemblies is coupled to the substantially planar surface of a corresponding facet.

Abstract: An electric motor includes: a stator; and a rotor, in which the rotor includes: a rotor core having magnet insertion holes; and magnets in the magnet insertion holes. Further, the rotor core includes: a rotor core main body; rotor core outer peripheral portions positioned outward in the rotor radial direction with respect to the magnets and forming parts of inner surfaces of the magnet insertion holes outward in the rotor radial direction; and bridges, forming the respective magnet insertion holes by connecting the rotor core main body and the rotor core outer peripheral portions, the bridges being formed to be thinner than thickest portions of the rotor core outer peripheral portions, and the magnets are shaped to be a cross-section polyhedron having oblique sides which narrow as the oblique sides go from the inward toward the outward in the rotor radial direction.

Abstract: A torsion sensor magnetic ring structure includes a seat and magnetic ring, wherein the magnetic ring is formed by punching a metal plate; a long side of a substrate is formed with a plurality of integral spaced magnetic teeth, one narrow end of the substrate is formed into an engagement tenon, and another narrow end thereof an engagement mortise, the substrate is wound and the tenon is in engagement with the engagement mortise to form into the circular magnetic ring. Therefore, the present invention is simpler than conventional magnetic rings in structure, and capable of accurately lowering the material cost and effectively reducing the volume and space.

Abstract: A rotor includes magnets, and magnet holes each of which includes an opening extending in a radial direction in plan view, penetrates a rotor core in the axial direction, and includes the magnet located therein. A magnetic pole surface of the magnet opposes a circumferential direction. The rotor core includes first thin plate cores and second thin plate cores. The first thin plate cores include an annular first inner plate, first outer plates on a radially outer side of the first inner plate and arrayed side by side in the circumferential direction, first inner connecting portions connecting the first inner plate and the first outer plate, and a first outer connecting portion that is on a radially outer side of the first outer plate and connects the adjacent first outer plates in the circumferential direction.

Abstract: The rotor includes a shaft that allows cooling oil to flow therein; a substantially cylindrical rotor yoke fitted over the shaft; a magnet fitted to the rotor yoke; and a first end plate abutting on one end of the rotor yoke. In this configuration, the rotor yoke includes a cooling oil passage that is formed on a radially inner side of the magnet and allows the cooling oil to flow in an axial direction, the rotor yoke receives a pressing force in the axial direction via the first end plate, and the rotor yoke and the first end plate form a sealing part that seals the cooling oil, in a section positioned between the cooling oil passage and the magnet in the radial direction.

Abstract: Implantable blood pumps and related methods employ a compact rotary motor. The compact rotary motor includes a stator and a rotor. The stator includes a stator core and stator coils. The stator core includes a toroidal portion. Each of the stator coils extends around a respective segment of the toroidal portion. The stator being disposed within the housing circumferentially about the dividing wall such that the blood flow conduit extends through the stator core. The stator core is disposed circumferentially around at least a portion of the rotor.

Abstract: One example is a system for controlling a motor during startup. The system includes measurement logic, pattern detection logic, and mode logic. The measurement logic monitors a back-electromotive force (BEMF) signal representing a BEMF of an electric motor and the pattern detection logic monitors this signal to detect instances of the monitored BEMF signal exhibiting a predetermined pattern. The mode logic enables control of the electric motor according to a plurality of modes of control. In some examples, the mode logic initially employs a first mode of control and switches from the first mode of control to a second mode of control in response to the pattern detection logic detecting that a BEMF signal exhibits the predetermined pattern over a plurality of commutation states.

Abstract: A rotor, a motor, an air-conditioning apparatus, and a method for manufacturing a rotor are provided with high productivity and reliability and with structural stability. The rotor includes a shaft, an inner core into which the shaft is inserted, an outer core provided on a radially outer side of the inner core and composed of a plurality of divided cores formed by stacking a plurality of thin plate materials and connected in an annular shape, and a coupling member made of resin, coupling the inner core and the outer core together, and covering both end faces of the outer core in an axial direction of the shaft. The outer core has radially outer parts of the divided cores brought into close contact with each other.

Abstract: A rotor for a permanent magnet generator includes a rotor body extending between a first end and a second end, having a cylindrical bore and a plurality of flats on an outer peripheral surface. Permanent magnets are positioned at the flats. An outer ring surrounds the permanent magnets and defines an outer diameter. A ratio of the outer diameter to an axial length between the first and second ends is between 3.2 and 3.4. An integrated drive generator and a method are also disclosed.

Abstract: A method for producing a pole housing for an electric motor includes preparing a tube lateral surface from a preferably pre-galvanized sheet metal material and shaping the tube lateral surface to form a cylindrical pole tube from the sheet metal material in such a way that longitudinal edges of the tube lateral surface extended in the tube longitudinal direction face towards one another. The longitudinal edges of the tube lateral surface are joined to one another to form a closed pole tube. A previously-provided cover is form-lockingly and/or force-lockingly fastened as a bearing plate to a front end face of the pole tube and a fluid-impermeable joint is formed between the cover and the pole tube. A pole housing for an electric motor and an electric motor having a pole housing are also provided.

Abstract: Provided is a rotor for a permanent magnet rotary electric machine, which enables the bonding of a permanent magnet to a rotor core in a skewed manner with respect to an axial direction of the rotor core. The rotor includes a rotor core including a cylindrical portion and a pair of polygonal columnar portions provided to both ends of the cylindrical portion in the axial direction, and a permanent magnet having a bonding surface, which is flat and bonded to the rotor core. The pair of polygonal columnar portions has flat surfaces that are arranged so that center positions are spaced apart from each other as viewed in the axial direction. The bonding surface of the permanent magnet is bonded to the respective flat surfaces of the pair of polygonal columnar portions under a state in which the permanent magnet is skewed with respect to the axial direction.

Abstract: A vessel propulsion apparatus includes a propulsive force generator including a duct and a propeller. The duct includes a stator. The propeller includes a rim that includes a rotor disposed at a position facing the stator, and a blade on an inner side in a radial direction of the rim. The vessel propulsion apparatus further includes a steering shaft that turnably supports the duct, a motor controller that rotationally drives an electric motor including the stator and the propeller in forward and reverse rotation directions, a turning mechanism that turns the duct in a full turning angle range including a range of ±180 degrees, and a turning angle range limiter that limits a turning angle range of the turning mechanism to a reduced turning angle range narrower than the full turning angle range, and when a predetermined limitation cancellation condition is met, cancels the limitation and allows turning in a turning angle range wider than the reduced turning angle range.

Abstract: A rotor includes a tubular sleeve member, a plurality of permanent magnets aligned in a peripheral direction on an outer peripheral surface of the sleeve member, and a tubular reinforcing member covering an outer peripheral surface of the permanent magnets. The sleeve member includes first and second end portions, which are spaced apart from each other in an axial direction, and an inner peripheral surface forming a through hole that is parallel to the axial direction and through which a shaft passes. The first end portion is a flange portion. The inner peripheral surface includes a first tapered surface, an inner diameter of which is continuously reduced toward the second end portion from the first end portion, and a tapered surface, an inner diameter of which is continuously reduced toward the end portion from the second end portion.

Abstract: A rotor and a motor having a rotor are provided. The rotor may include a rotor core, a cover provided on an upper part of the rotor core, a magnet provided on an outer circumferential surface of the rotor core, and a can member that accommodates the rotor core and the magnet therein and is coupled to the cover. The cover may include a groove formed in a circumferential direction with respect to the center of the cover and into which an edge of the can member may be inserted, and the edge of the can member may be inserted into the groove of the cover to be coupled to the cover. Therefore, use of an adhesive when the can member is coupled to the rotor core may be avoided.

Abstract: A rotation measurement system is shown and described herein. In some embodiments, the rotation measurement system comprises a pinion gear comprising an elastic material allowing the pinion gear to deform. The elastic deformation of the pinion gear provides a complete mesh such that there is no backlash between the pinion gear and a main gear when the pinion gear is pressed into the main gear. The pinion gear may be held in place with at least one spring pressing the pinion gear into the main gear. A sensor for measuring the rotation of the pinion gear may be decoupled from the pinion gear assembly by utilizing a Hall effect sensor to detect a magnetic field of a magnet disposed on a shaft coupled to the pinion gear.

Abstract: A permanent magnet synchronous motor with an integrated pump body and its preparation method are provided. The preparation method comprises: 1) performing an injection molding process for the first time on a coil, which is wound on a coil former, to form a coil sealing part for sealing the coil; 2) assembling an iron core in the sealed coil and performing the injection molding process for the second time on them to form a pump body part with a rotor barrel, wherein the rotor barrel is formed by conducting the injection molding process based on the iron core, and an isolating thin layer is formed at a polar arc part of the iron core to isolate the iron core from a rotor cavity in the rotor barrel. A good electromagnetic property of the motor is ensured and the water leakage problem is solved.

Abstract: Provided is a rotor group for electromechanical components including a substantially cylindrical, magnetic element, defining a main axis, two bases and a side surface, and including a through hole substantially centred on the main axis, defining inner walls and including at least one groove, for the rotational constraint around the main axis of a transmission element with respect to the magnetic element, on the inner walls, and the transmission element including polymeric material, mainly arranged inside the through hole, including coupling tabs, in contact with the inner walls of the through hole, configured for the rotational constraint around the main axis of the transmission element with respect to the magnetic element and including coupling tabs presenting folded free ends in situ, in contact with at least one of the bases, adapted to constrain the translation along the main axis of the transmission element with respect to the magnetic element.

Abstract: A torque delivering apparatus, including: polygonal cross-section stator body having a plurality of exterior side faces of even number extending between opposite axial end faces, the stator including cylindrical bore extending between the opposite axial ends and centred on central axis of the stator body; a rotor assembly having cylindrical cross-section sized for rotation within the cylindrical bore about the central axis with at least one permanent magnet and shaft coupled to the magnet for rotation; and a plurality of solenoid coils, each coil having plurality of windings and routed to have sections extending parallel along opposite ones of the plurality of exterior side faces; wherein each of the plurality of coils is configured to selectively receive current and generate magnetic field in the stator that is applied to the rotor magnet, the rotor being subject to magnetic torque within the cylindrical bore for rotating and aligning the magnetic field of the permanent magnet with the generated magnetic fie

Abstract: A rotor includes: a rotary member; permanent magnets in a plurality of columns which are arranged along the circumferential direction of the rotary member and each of which is divided into a plurality of permanent magnets in a rotary axis direction X of the rotary member; and a sheath tube which is fitted to the outer circumferential side of the permanent magnets, which covers the permanent magnets and which is formed of a fiber-reinforced plastic, and the sheath tube is divided, in the rotary axis direction X of the rotary member, by a division number which exceeds the division number of the permanent magnets.

Abstract: The present invention relates to a magnet retainer for use in a bldc motor of an electrical appliance. The bldc electric motor comprises a stator, a shaft and an inner magnet-rotor which comprises a core that includes a plurality of slots each for receiving a permanent magnet and a bore for press-fittingly receiving the shaft and a plurality of permanent magnets that are adapted to be respectively mounted into the slots. The magnet retainer of the present invention comprises a main body which is adapted for installation onto the core and a plurality of outer legs each disposed onto the main body and each adapted to be inserted into the respective slot, to resiliently press the respective permanent magnet radially outwards and to clamp the respective permanent magnet within the slot.

Abstract: A first magnet group provided to a first core member and a second magnet group provided to a second core member are adjacent to each other in an axial direction of a rotor. The first magnet group includes a plurality of first magnets arrayed in a circumferential direction of the rotor. The second magnet group includes a plurality of second magnets arrayed in the circumferential direction. The first magnet and the second magnet, which are adjacent to each other and have the same polarity, are shifted from each other by a certain angle in the circumferential direction. One of the first core member and the second core member has a first recessed portion, and another of the first core member and the second core member has a first protruding portion to be engaged with the first recessed portion in the circumferential direction.

Abstract: The present teaching relates to a magnetic sensor comprising an input port to be connected to an external power supply, a magnetic field detecting circuit configured to generate a magnet detection signal, an output control circuit configured to control operation of the magnetic sensor in response to the magnet detection signal, and an output port. The magnetic field detecting circuit includes a magnetic sensing element configured to detect an external magnetic field and output a detection signal, a signal processing element configured to amplify the detection signal and removing interference from the detection signal to generate processed detection signal, and an analog-digital conversion element configured to convert the processed detection signal into a magnet detection signal, and the output control circuit is configured to control the magnetic sensor to operate in at least one of a first state and a second state responsive to at least the magnet detection signal.

Abstract: A single phase permanent magnet motor includes a stator. The stator includes a stator core and windings. The stator core includes a ring portion, tooth bodies extending radially from the ring portion, and a pole shoe extending from a distal end to two circumferential sides of each tooth body. Each pole shoe defines a positioning slot. A center of each positioning slot is offset from a center of symmetry of one adjacent tooth body so that a torque fluctuation of an output torque of the single phase permanent magnet motor during operation is less than 50%. As a result, the motor vibration and noise are small.

Abstract: A synchronous motor includes a stator with a stator winding, and a rotor on which magnetic poles made of permanent-magnetic material are formed, each pole having a cambered outer contour, especially an outer contour cambered radially outwards, in particular, 2×p individual poles being salient in the circumferential direction, p being the number of pole pairs.

Abstract: A motor, a pump and a cleaning apparatus are provided. The motor includes a stator and a rotor rotatable relative to the stator. The stator includes a stator core and stator windings wound around the stator core. The stator core includes a pair of opposing poles and a yoke connected between the poles. Each pole has a pole arc surface facing the rotor, with an air gap formed between the pole arc surface and the rotor. The pair of poles includes opposing circumferential end portions spaced apart from each other, and a ratio of a distance between the circumferential end portions to a minimum width of the air gap between the pole arc surface and the rotor is less than 2.

Abstract: A multi-pole component for an electric machine includes an upper side, a lower side, a first magnetic pole having a surface on the upper side, a second magnetic pole having a surface in a tangential direction adjacent to the first magnetic pole on the upper side and a soft-magnetic device. The soft-magnetic device has a recess between the first magnetic pole and the second magnetic pole. A vertical direction is directed from the upper side to the lower side at right angle to a tangential direction. The first magnetic pole has a permanent magnet with a magnetization in one direction, and the second magnetic pole does not have a permanent magnet.

Abstract: According to one embodiment, a transverse flux machine includes a stator and a rotor. The stator includes a winding and a first ferromagnetic unit. The winding is wound along a rotational direction of a rotation axis. The first ferromagnetic unit has L (L is integer number) magnetic poles holding the winding. The rotor is rotatable relatively to the stator around the rotation axis. The rotor includes a second ferromagnetic unit having L magnetic poles facing the first ferromagnetic unit. If an order of harmonic component of torque ripple to be reduced is (N×1), (N×2), . . ., (N×(M?1)) (M and N are integer numbers. ML), among L magnetic poles in the first and second ferromagnetic units, a relative position of M magnetic poles along the rotational direction is shifted by ?1 ((180°/N/M)?1 (540°/N/M)) in order.

Abstract: The ceiling fan motor according to the present invention includes a rotor assembly including a rotor housing installed with a plurality of yoke pieces and a plurality of magnets in the inner side, the rotor housing having a plurality of magnet fixing parts formed between the plurality of magnets, a stator assembly placed in the inner side of the rotor assembly, the stator assembly including a stator core, and an upper insulator and a lower insulator engaged with the upper part and lower part of the stator core, and a shaft fixed being engaged with the center part of the stator core, and the magnet is engaged being forcibly press-fitted between the fixing parts.

Abstract: A welding electrode for use in resistance spot welding an assembly of overlying metal workpieces that includes an aluminum alloy workpiece is disclosed. The welding electrode includes a body, a convex weld face at one end of the body, and ringed protrusions that project outwardly from the convex weld face. The ringed protrusions are positioned to make contact with, and indent into, a surface of the aluminum alloy workpiece when the convex weld face is pressed against the aluminum alloy workpiece during a spot welding event. When brought into contact with the surface of the aluminum alloy workpiece, the ringed protrusions disrupt the oxide film present on the aluminum alloy workpiece surface, which improves the spot welding process.

Abstract: A propulsion system for a vehicle includes a supporting structure and a plurality of propellers carried by the supporting structure. Each propeller is associated to an electric motor with a toroid geometry, having an annular rotor rotatable within an annular stator and defining therewithin a central aperture. The blades of the propeller, which are carried by the rotor, extend to the central aperture.

Abstract: An electric fluid pump, rotor unit therefore, and methods of constructions thereof are provided. The fluid pump includes a stator unit configured to generate a magnetic field in response to a control signal. A rotor unit is received within the stator unit, wherein the rotor unit is configured to rotate about a central rotor axis in response to the magnetic field generated by the stator unit. The rotor unit includes a plurality of magnets contained in through openings of a carrier assembly having first and second carrier members, wherein the first and second carrier members are fixed to one another by bond joints.

Abstract: The rotor for an electric motor includes a central rotor shaft (2) and a permanent-magnetic rotor body fastened on the rotor shaft. The rotor body is provided with a casing (8) which is radially distanced to the rotor shaft (2). A first annular space, which is adjacent the casing (8) and which is molded out with a plastic (10) at least partly containing magnet particles, is formed between the rotor shaft (2) and the casing (8).

Abstract: A magnetic sensor integrated circuit, a motor assembly and an application device are provided. The integrated circuit includes a housing, a semiconductor substrate, at least one input port and an output port, and an electronic circuit arranged on the semiconductor substrate. The electronic circuit includes a rectifying circuit, a magnetic field detection circuit configured to detect an external magnetic field and output magnetic field detection information, and an output control circuit connected to the rectifying circuit, and configured to control, at least based on the magnetic field detection information, the integrated circuit to operate in at least one of a first state in which a load current flows from the output port to an outside of the integrated circuit and a second state in which a load current flows from the outside of the integrated circuit to the output port. The load current flows through the rectifying circuit.

Abstract: An external rotor motor includes an inner stator and an external rotor. The external rotor includes a casing and a plurality of magnets. The casing has an annular inner wall. The annular inner wall faces the inner stator and surrounds the inner stator. The magnets are placed along the annular inner wall of the casing. The magnets surround the inner stator. An end of at least one of the magnets has a round edge, a curvature radius of the round edge is R, a thickness of the at least one of the plurality of magnets is T, and the following condition is satisfied: 0.85?R/T?1.

Abstract: A stator core for a rotating electrical machine includes an annular yoke portion; a tooth group fitted to an inner side of the yoke portion and formed such that both ends in a circumferential direction on an inner circumferential side of adjacent teeth are integrally connected with each other by a thin connection portion; and a slot for accommodating a stator winding. The yoke portion has grooves at regular intervals in an inner circumferential surface thereof and extending in an axial direction of the stator, the grooves each having a V shape such that a cross section thereof perpendicular to the axial direction opens toward an inner side of the stator core. Each tooth has, at an outer-circumferential-side end thereof, a fitting portion whose cross section perpendicular to the axial direction is formed in a wedge shape so as to allow the tooth to be fitted along the corresponding groove.

Abstract: A rotor of a rotary electric machine includes a rotor core. The rotor core has magnet insertion holes which are arranged at first circumferential intervals and in which permanent magnets are disposed. The rotor core includes steel plates, a first core block, and a second core block. The steel plates are stacked in an axial direction of the rotor. The first core block includes first steel plates among the steel plates stacked with rotational stacking at a rotational stacking angle corresponding to a common multiple of a first circumferential interval among the first circumferential intervals and a second circumferential interval among second circumferential intervals. The second core block includes second steel plates among the steel plates stacked with the rotational stacking at the rotational stacking angle from a position shifted by an angle corresponding to the first circumferential interval relative to the first core block.

Abstract: Apparatuses and methods relating to hub motors having enhanced thermal characteristics may include a hub motor having a stator comprising steel and a central axle (e.g., a mandrel and shaft) comprising a material with a substantially higher thermal conductivity than the stator (e.g., aluminum). Heat may be transferred from the stator through the axle of the motor to an outside heat sink. Manufacturing of thermally enhanced hub motors may include extrusion and/or cryogenic fitting methods relating to the central mandrel and shaft.

Abstract: A rotor for an electric machine is mounted for rotation about an axis and includes a plurality of permanent magnets placed on a radial outer surface of the rotor for forming at least one magnetic pole pair. An anisotropically-soft sintered magnetic material having an easy direction and a hard direction is located in at least one section of the rotor radially further inward than the plurality of permanent magnets.