Abstract: A motor includes a rotation shaft, a stator, and a rotor. The stator includes an armature winding and a stator core including a main core portion with an axial stack of core sheets and a magnetic plate on an end thereof. Each core sheet includes a tooth formation portion around which the armature winding is wound. The magnetic plate includes a stacked portion and an axially extending portion. The stacked portion stacked on the axial end of the main core portion and includes an end located toward the rotor. The axially extending portion extends toward the outer side in the axial direction from the end of the stacked portion located toward the rotor and is opposed to the rotor in a radial direction of the motor. The axially extending portion is shaped to be magnetically skewed in a circumferential direction relative to the tooth formation portion and the stacked portion.

Abstract: Disclosed therein is a motor with a variable magnetic flux, which includes a rotor and a stator located inside the rotor. The rotor includes a rotor housing, a rotor core attached to the inner circumference of the rotor housing, and magnets attached to the inner surface of the rotor core. The stator includes a stator core base and a plurality of teeth radially formed on the outer peripheral surface of the stator core base at equal intervals, and each of the teeth has ears formed at both sides of an end thereof. The magnets are divided into first magnets and second magnets, the second magnets are low in coercive force than the first magnets, and a plurality of the first magnets are located at both sides of the second magnets.

Abstract: Disclosed herein is a spindle motor including: a rotating part including a hub coupled to a rotating shaft and a magnet coupled to the hub; and a fixing part including a sleeve supporting the rotating shaft and an armature facing the magnet, wherein the magnet has a contact part formed on an upper end portion thereof in a direction of the rotating shaft, the contact part partially contacting a lower end portion of the hub.

Abstract: A rotor has a rotor shaft, a rotor boss, a first magnetic pole, a second magnetic pole, an end cover, and a radially-outer cover. The first and the second magnetic poles are placed to a radially outer periphery of the rotor boss to be alternately arranged in a circumferential direction. A space is defined between the end cover and the first magnetic pole or the second magnetic pole, which is made of a magnet. The radially-outer cover has a first end portion and a second end portion, at least one of the first end portion and the second end portion being defined as a particular end portion. The particular end portion of the radially-outer cover is inwardly crimped onto the end cover in a radial direction.

Abstract: In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes a shaft comprising an outer diameter, a first hub coupled about the shaft outer diameter, and a first plurality of pole pieces positioned radially about the hub. The rotor further includes a plurality of permanent magnets positioned radially about the hub. The plurality of pole pieces and the plurality of permanent magnets define a rotor outer diameter, and the rotor outer diameter is magnetically isolated from shaft.

Abstract: In one embodiment, a permanent magnet rotor for use with a stator is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge, a hub having an inner edge defining a central opening, and a plurality of independent pole pieces spaced from the hub radially about the central opening. The rotor core further includes at least one radial aperture extending radially from the outer edge through the rotor core between adjacent independent pole pieces, the at least one aperture configured to receive the at least one permanent magnet.

Abstract: A permanent magnet rotor including a shaft, a rotor core fixed to the shaft, a magnet disposed around the core, and a linker fixed relative to the shaft and located at one end of the core. An elastic clamping structure is arranged between the linker and the magnet such that rotational torque of the magnet is transferred to the shaft via the linker.

Abstract: Generator rotor comprising a rotor rim and a plurality of permanent magnet modules and a plurality of anchors arranged at an outer or inner circumference of the rotor rim such that the anchors substantially fix the permanent magnet modules to the rotor, wherein the permanent magnet modules comprise a base having a bottom surface, two axially extending side surfaces and a top surface, and one or more rows of magnets mounted on said top surface, wherein the two side surfaces of the permanent magnet modules each comprise an axially extending groove, and wherein the anchors have a shape that substantially fits exactly in axially extending grooves of neighbouring permanent magnet modules.

Abstract: An apparatus and method for the installation and removal of permanent magnets in a permanent magnet electromechanical machine, for example a wind turbine power unit generator. A magnet holder is mounted on a magnet carrying structure such as a rotor. Permanent magnets may be inserted into and removed from the magnet holder after the electromechanical machine is assembled. In this manner, permanent magnets may be installed on the magnet carrying structure by an interference fit, without using bolts or adhesives, to facilitate both assembly and removal for maintenance and repair.

Abstract: A stator and a rotor are oppositely arranged having a gap between the stator and the rotor in a direction parallel to a rotary shaft. The rotor has permanent magnets forming field magnetic poles and soft magnetic material segments to cover at least stator-facing surfaces of the respective permanent magnets. Each of the soft magnetic materials forms a composite part together with the permanent magnet. The rotor further has a disc-shaped nonmagnetic molded frame molded so as to cover the periphery of the composite part including the permanent magnet and the soft magnetic material segment while leaving a stator-facing surface of the soft magnetic material segment as an exposed surface. The composite part (including the permanent magnet and the soft magnetic material) and the nonmagnetic molded frame are integrated by molding of the molded material.

Abstract: Permanent-magnet (PM) rotors, rotor components, and machines using PM rotors.

Abstract: A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is hi, M unit vectors in total, each being in an angular direction of 2?N(i?1)/M (rad), are defined, and a sum of M vectors obtained by multiplying the unit vectors respectively by the positional shift amount hi is smaller than a maximum value of an absolute value of the positional shift amount hi.

Abstract: A motor is provided for use in a machine. The motor includes a segmented stator comprising magnetically isolated core segments.

Abstract: A permanent magnet rotor of a motor including a rotor core and permanent magnets. The rotor core includes a central core, a plurality of sectional cores, and a connecting mechanism. The sectional cores are integrated with the central core via the connecting mechanism to form a whole iron core. Grooves are formed between each sectional core and the central core and the permanent magnets are embedded in the grooves. The permanent magnet rotor has a simple structure, excellent manufacturability in terms of production and assembly, low manufacturing costs, excellent electromagnetic performance, and meanwhile is robust enough to avoid potential deformation.

Abstract: A rotor (300) for an axial-flux electrical machine is disclosed. The rotor has a plurality of permanent magnets (350) fixed thereto, with each of the plurality of magnets extending at least partly through an aperture in the rotor. The arrangement is such that material of the rotor (200) abuts each magnet (350) so as to locate the magnet substantially circumferentially with respect to the axis of rotation of the rotor and substantially axially in at least one axial direction. The magnets (350) may slide radially onto the rotor (300) and be constrained axially and circumferentially by a tongue-and-groove arrangement (325, 355), with reinforced tape (340) being wound around the radially outer edge thereof to provide radial constraint.

Abstract: Disclosed is a rotor and a motor having the rotor, the motor including a rotor including a rotor core including a body centrally formed with a rotation shaft hole, at least two first disengagement prevention units protruded to a radially external side along a periphery of the body, and a second disengagement prevention unit mounted to a circumferential direction of the body from each distal end of the first disengagement prevention units, and two or more magnets including a rear surface contacting the body of the rotor core, a lateral surface contacting the first disengagement prevention unit and a front surface contacting the second disengagement prevention unit, a rotation shaft coupled to the rotation shaft hole, and a stator core and a coil wound on the stator core for rotating the rotor.

Abstract: An electric motor is provided. The electric motor comprises a stator and a rotor rotatable about an axis and spaced at least in part radially outside the stator. The rotor includes a plurality of arcuately spaced apart pole segments, a plurality of arcuately spaced apart magnets alternately arranged with the pole segments such that each of the pole segments is positioned between an adjacent pair of the magnets, a rotor can at least in part supporting the pole segments and the magnets, and a plurality of pegs. Each of the pole segments defines an opening therethrough and includes a generally arcuately extending wall structure positioned radially outside of and at least in part defining the opening. Each of the pegs extends through a corresponding one of the openings to secure a corresponding one of the pole segments relative to the can.

Abstract: A yoke for a permanent magnet machine shows a surface with an accommodation area for accommodating a permanent magnet, wherein two recesses are provided adjacent to the accommodation area to increase reluctance.

Abstract: A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is hi, M unit vectors in total, each being in an angular direction of 2?N(i?1)/M (rad), are defined, and a sum of M vectors obtained by multiplying the unit vectors respectively by the positional shift amount hi is smaller than a maximum value of an absolute value of the positional shift amount hi.

Abstract: A permanent magnet rotor for a brushless electric motor of the kind with an internal stator, has a carrier structure of molded plastic that includes a disc portion fixed to a shaft. The disc portion has a periphery joined to a substantially cylindrical cage portion coaxial with the shaft. The cage portion accommodates a magnetic flux conducting structure forming an wall which is coaxial with the shaft, and a plurality of permanent magnets shaped as ring segments, disposed at angular intervals within and adjacent to the flux conducting structure. Each magnet has its circumferentially terminal faces parallel with each other or converging in the outward direction. The cage portion is overmolded onto the flux conducting structure and has a plurality of angularly spaced struts which are essentially parallel to the axis of the rotor and which protrude radially inwards.

Abstract: The present application provides a segmented rotor. The segmented rotor may include a center wheel, a number of rotor support segments positioned about the center wheel, and a number of active rotor components positioned about each of the rotor support segments.

Abstract: A fan includes an impeller and an inner rotor motor. The inner rotor motor connects to the impeller and drives it to rotate. The inner rotor motor includes a bushing, a shaft, a magnetic conducting shell, a magnetic element and a stator. The shaft passes through the bushing and is coupled to the impeller. The magnetic conducting shell is coupled to the shaft and telescoped to the bushing. The magnetic element is disposed around outside of the magnetic conducting shell. The stator is disposed around outside of the magnetic element.

Abstract: Disclosed herein is a rotor of a brushless direct current motor including magnets, a core in which the magnets are accommodated, a rotating shaft inserted into the core, and a pair of cover members inserted into the rotating shaft to cover both ends of the core, respectively.

Abstract: A stator arrangement of an electric machine, particularly a generator in a wind turbine is provided. The stator arrangement is radially surrounded by a rotatably mounted rotor arrangement. During normal operation the stator arrangement is non-rotatably connected to a stationary part of the generator. The stator arrangement may be released from the non-rotatable connection to the stationary part of the generator so as to be revolved relative to the stationary part of the generator. A method for positioning such a stator arrangement is also provided.

Abstract: A multi-phase multi-pole electric machine attached to a vehicle. The multi-phase multi-pole electric machine includes rotor, stator with five phase windings, machine controller, and torque sensors. The machine controller controls the flow of current. The torque sensors senses the torque exerted by the vehicle and transmits the information to the machine controller. The machine controller provides four degree of control through injection of five phase currents and thus providing higher torque.

Abstract: A rotor unit includes a plurality of rotating bodies arranged along a central axis. Each of the plurality of rotating bodies includes an annular rotor core surrounding the central axis, a plurality of magnets arranged in the circumferential direction around the rotor core, and a holder arranged to hold the magnets. Further, the holder includes a plurality of partitioning portions each axially extending between respective ones of the plurality of magnets. The axial dimension of the plurality of partitioning portions is longer than the axial dimension of the respective ones of the plurality of magnets which are held by the plurality of partitioning portions. Further, the plurality of rotating bodies is disposed in a state where the circumferential positions of the plurality of magnets are out of alignment.

Abstract: A rotor for a synchronous machine has a rotor axis which defines a rotor shaft. The rotor has a winding support which is arranged on the rotor shaft such that they rotate together, in such a way that it surrounds the rotor shaft in a center section with respect to the rotor axis. The winding support is fitted with a superconducting rotor winding. The rotor has a sleeve which at least radially surrounds the winding support and the rotor winding with respect to the rotor axis. The sleeve is formed integrally from a metal alloy, which is non-magnetic, has an electrical conductivity of at least 60% of the electrical conductivity of copper at 20° C., has a mechanical tensile strength of at least 250 N/mm2 at 200° C. and has a 0.2% proof stress of at least 200 N/mm2 at 200° C.

Abstract: A vacuum mechanical rotation-transmitting apparatus is disposed on a hollow member that defines a vacuum chamber. The apparatus includes an input shaft assembly, an outer shaft assembly extending into the input shaft assembly and the vacuum chamber, a spacer member disposed between the input and output shaft assemblies, a plurality of first magnetic units disposed on the input shaft assembly, and a plurality of second magnetic units disposed on the output shaft assembly. A magnetic attractive force is produced between the first and second magnetic units to allow for co-rotation of the output shaft assembly with the input shaft assembly.

Abstract: There are provided a rotor assembly for a motor and a spindle motor including the same. The rotor assembly includes: a rotor case including a rotor hub fixed to a shaft, a rotor extension part extended from the rotor hub in an outer radial direction, and a magnet coupling part extended from the rotor extension part in a downward axial direction; and a magnet provided on an inner surface of the magnet coupling part, wherein a thickness of the magnet in a radial direction may correspond to 8.5 to 20% of a distance from a center of rotation of the rotor case to an edge of the rotor case in the outer radial direction.

Abstract: A rotation direction control method of a cooling fan is disclosed. The rotation direction control method includes a detection step, a determination step and a driving step. The detection step receives a temperature control signal from a temperature detection unit by a rotation direction control unit when a predetermined dust-expelling time period begins. The determination step determines whether a detected temperature is higher than a predetermined value based on the temperature control signal by the rotation direction control unit. The driving step controls the rotation direction control unit to keep outputting a cooling signal so as to drive a motor of the cooling fan for a cooling operation when the determination of the determination step is positive.

Abstract: A rotor having an improved structure capable of achieving enhanced durability is disposed in a motor, the rotor including a sleeve having a shaft hole, through which a motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and permanent magnets each disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates may be disposed at opposite sides of the permanent magnets in an axial direction. Each of the first and second cover plates may include a shaft receiving hole to receive the motor shaft. The rotor may include a plurality of support members each having a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor.

Abstract: Disclosed is a torque rotor and method for manufacturing the torque rotor having an effect of preventing inflow of plastic between a yoke and a magnet during a conventional plastic injection molding process for forming an assembling structure after assembling between the yoke and the magnet, thereby preventing degradation of a roundness of the magnet or damage of the magnet due to the difference in the temperature expansion coefficients, and preventing idle rotation of the yoke and the magnet relative to each other.

Abstract: A rotor for an outer rotor-type motor is provided. The rotor includes a metallic coupler and a polymeric frame molded over at least part of the metallic coupler.

Abstract: A rotor or stator hub for an electric machine includes a plurality of magnets arranged in a predetermined same pattern on a plurality of uniformly sized carrier plates. A plurality of permanent magnets are uniformly mounted on each of the carrier plates proximate a first edge of the carrier plate and spaced away from a second edge of the carrier plate. The carrier plates may be mounted on a rotor or stator hub in a predetermined configuration to create a plurality of axial array groups.

Abstract: A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, a bracket fixed to the rotor core, and a plurality of permanent magnets contacting an outer surface of the rotor core. The bracket includes a base at one axial end thereof, a plurality of arms axially extending from the base and spaced in a circumferential direction, and an end ring connecting the arms at the other axial end thereof. The base has an opening for the insertion of the shaft. The rotor core is positioned between the arms. Each magnet is sandwiched between two adjacent arms. An inner diameter of the end ring is greater than an outer diameter of the rotor core.

Abstract: Permanent-magnet (PM) rotors, rotor components, and machines using PM rotors.

Abstract: A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, and multiple magnet sets. The rotor core has multiple groove sets for receiving the magnet sets. Each groove set has two grooves spaced apart by a first section of the rotor core. The first section has a width gradually decreasing from a radially inner end to a radially outer end. Each groove has a width gradually increasing from a radially inner end to a radially outer end. Each magnet set includes two magnets respectively received in the grooves of a respective groove set. The magnets of a magnet set are magnetized in a same direction, and every two adjacent magnet sets are magnetized in contrary directions creating multiple magnetic poles. The number of magnetic poles is equal to the number of magnet sets.

Abstract: An energy conversion system is described and includes a cylindrical rotor having a mass and multiple magnets affixed on an outer face thereof; a cylindrical stator including a dielectric cylinder wound with copper wire in a predetermined configuration, the cylindrical rotor being placed within the cylindrical stator; and a rotatable shaft for rotating the rotor, the rotatable shaft being placed in the center of the cylindrical rotor. The system harvests environmental energy for lower power generation and accounts for non-mechanical sources of rotational resistance within the generator.

Abstract: A rotor for motor may include a rotation shaft, a permanent magnet structured in a tube-like shape and fixed to an outer peripheral side of the rotation shaft, and a sleeve which is structured in a tube-like shape, disposed between an outer peripheral face of the rotation shaft and an inner peripheral face of the permanent magnet, and press-fitted and fixed to the outer peripheral face of the rotation shaft. The sleeve is retreated from an end part of the permanent magnet on one side in an axial direction to the other side in the axial direction so that a first ring-shaped recessed part is formed between the rotation shaft and the permanent magnet and the rotation shaft and the permanent magnet are fixed to each other with a first adhesive in the first ring-shaped recessed part. The rotor may be applied to a motor, preferably to a stepping motor.

Abstract: A rotor assembly for an electric machine includes an outer sleeve and a plurality of permanent magnets disposed in the outer sleeve. An inner sleeve is located inboard of the plurality of permanent magnets and includes a plurality of inner sleeve segments that form a tapered inner sleeve surface. A rotor shaft is located inboard of the inner sleeve and has a tapered outer shaft surface engageable with the tapered inner sleeve surface in an interference fit to force the plurality of inner sleeve segments into engagement with the plurality of permanent magnets.

Abstract: A rotating element with embedded permanent magnets is provided that includes: a rotor core adapted to be within the diameter direction of a stator; first permanent magnets embedded near the exterior circumference face of the core, and orthogonally extending with a d axis; and second permanent magnets embedded on both sides of each of the first magnets, and extending along a q axis. The rotating element further includes gaps formed in the core away from both circumference direction ends of the first magnets. The gaps further include exterior end parts at the furthermost exterior side with respect to the diameter direction of the core, and interior end parts at the furthermost interior side with respect to same. The magnetic pole faces of the first magnets are located between the exterior and interior end parts of the gaps.

Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation.

Abstract: The disclosure relates to an electric machine with a permanent magnet rotor, where permanent magnets have been fitted on an outer surface of a cylindrical rotor, and relates to a permanent magnet. The permanent magnets forming the electric machine's rotor pole are shaped so that the electric machine's air gap is substantially constant in a middle of the pole, and the air gap increases in an essentially straightforward manner when moving towards the edge of the pole. The permanent magnet is of an even thickness in the middle, and becomes thinner towards the edges. This can result in a decrease in the torque ripple and cogging torque of an electric machine.

Abstract: A rotor for a motor is provided including: a rotor core including at least one a first coupling portion on an outer circumference thereof, wherein the first coupling portion includes a first coupling groove or a first coupling projection; at least one division core spaced apart from the rotor core and including a second coupling portion on an outer circumference thereof, the second coupling portion including a second coupling groove or a second coupling projection; and a connecting pin including a third coupling portion and a fourth coupling portion, the third coupling portion to be coupled to the first coupling portion and the fourth coupling portion to be coupling to the second coupling portion.

Abstract: The rotor assembly contains a number of polar anisotropic ring magnets sequentially stacked, a number of supporting rings within the stacked ring magnets, and an axle threading through the supporting rings. The ring magnets are of a same diameter and length. Each supporting ring contains three co-centric rings: an inner steel ring, a middle rubber ring, and an outer steel ring. The supporting rings are positioned with substantially equal spacing and with a gap away from each aperture of the stacked ring magnets, so that additional weight elements could be positioned and adhered within the gap. The periodic positioning of a number of supporting rings could significantly reduce the weight of the motor assembly with much improved steadiness. Additionally, the middle rubber rings of the supporting rings provide a buffer mechanism for absorbing vibration and noise reduction.

Abstract: An outer rotor motor comprises a rotor rotating about an axis, and a fixed stator. Provided over the inner peripheral surface of a cylindrical part of a fan connecting resin member are a ring-shaped yoke, a ring-shaped rotor magnet fixed to a fixing slot defined in the radially inner surface of the yoke, and yokes fixed to fixing slots defined in a radially inner surface of the rotor magnet. The rotor magnet is so magnetized that magnetic poles alternately change in a circumferential direction. The yoke covers a radially outer surface of the rotor magnet, and parts on a radially outer side of an axially upper surface and an axially lower surface of the rotor magnet.

Abstract: There are provided an axial gap motor including a rotor having plural main magnet portions magnetized in the rotational axis direction and disposed at predetermined intervals in a circumferential direction, also plural yoke portions formed by a lamination member of tape-like wound electromagnetic steel sheet and are disposed on either axial side of the main magnet portions, also a rotor frame having plural ribs disposed individually between the main magnet portions adjacent to each other in the circumferential direction and extend in a radial direction, and inner and outer cylindrical portions are provided at respectively inside and outside diameter sides of the ribs and made of a die casting alloy; also the main magnet portions each have a groove at an inner circumferential side thereof for preventing the displacement of the position of the main magnet portions.

Abstract: A motor includes a stator having stator cores, a coil wound around the stator cores, and a rotor disposed at an inner side of the plurality of stator cores. The rotor includes a sleeve, a plurality of rotor cores arranged in a circumferential direction of the rotor, a plurality of bridges arranged to connect the sleeve to each of the plurality of rotor cores, a plurality of permanent magnets provided between the rotor cores to form an interior space with respect to the sleeve while being spaced apart from the sleeve, and a plurality of support protrusions protruding from the sleeve in an outward radial direction of the sleeve to support the plurality of permanent magnets while corresponding to the plurality of permanent magnets, respectively, the plurality of support protrusions being arranged between the bridges while being spaced apart from the bridges in the circumferential direction of the rotor.

Abstract: A rotor includes a rotor core; and first and second permanent magnets arranged in the core such that each of the first magnets corresponds to one of the second magnets and, on a cross-sectional plane of the rotor core perpendicular to a rotation axis thereof, a first line passing through the first magnet and a second line passing through the second magnet meet at a point pointing toward the rotation axis. The first and second magnets are arranged such that a straight line interconnecting the rotation axis and the point is interposed therebetween, an angle of the first magnet relative to the straight line being smaller than that of the second magnet relative to the straight line, and a width of the first magnet in the direction parallel to the first line being smaller than that of the second magnet in the direction parallel to the second line.

Abstract: A field structure of an electrical machine includes a plurality of field slots. Each field slot extends from a first surface of the field structure into the body of the field structure. Each filed slot also has a T-shaped cross-sectional area dimensioned to accommodate a magnet pole assembly comprising a corresponding cross-sectional area.