Abstract: The present disclosure relates to rotors for an electrical machine comprising a first type of permanent magnets, and a second type of permanent magnets, wherein the first and the second types of permanent magnets have a same magnetic strength, and wherein the first type of permanent magnets has a first temperature rating, and the second type of permanent magnets has a second temperature rating different from the first temperature rating. The present disclosure relates to generators, and in particular to wind turbines comprising such generators and to methods for selecting or providing magnets for permanent magnet rotors.

Abstract: A stator includes a stator core and a coil wound around the stator core. The coil includes at least one first winding and at least one second winding connected to the first winding in series. The stator satisfies (C1/S1)>(C2/S2), where S1 is a total cross-sectional area on a first side of a coil-end part of the coil, S2 is a total cross-sectional area on a second side of the coil-end part, C1 is a total cross-sectional area of the first winding on the first side, and C2 is a total cross-sectional area of the first winding on the second side.

Abstract: A motor cover structure sealing a housing of a motor includes a partition wall disposed on one side of a stator disposed within the motor to contact a cover contacting the housing, and a body part mounted with the partition wall, in which an oil recovery line is defined between the partition wall and the body part, and the oil flows to the oil recovery line in a space of one side of a rotor disposed within the motor.

Abstract: The invention relates to a non-cogging electric generator having at least one stator and at least one dual rotor, wherein the dual rotor comprises a plurality of primary magnet devices arranged in circular Halbach array. Non-cogging is achieved by having inner and outer rotor rotating synchronously. Concentration of magnetic flux is achieved by magnetic devices tapering into pyramidal shape, such that magnetic devices arranged on the inner rotor are facing magnetic devices on the outer rotor, whereas said magnetic devices are facing each other with the opposite polarity. Stator comprises electrical wire windings and is positioned between inner and outer rotor.

Abstract: An electric machine may include an stator and a rotatable rotor. At least one of the stator or the rotor may include a plurality of multi-part trapezoidal teeth with an electromagnetic coil disposed around each tooth.

Abstract: A method for manufacturing a distributed straight-angle armature winding according to the present invention comprises a step (a) of preparing a raw material in which at least a pair of intra-slot winding areas and an end winding area provided between the pair of intra-slot winding areas are continued, a step (b) of forming an inclined surface by processing a contact surface in contact with an inner surface of a slot of at least a stator of the circumferences of the pair of intra-slot winding areas, and a step (c) of bending a space between the end winding area and the intra-slot winding area.

Abstract: A winding arrangement for a stator of an electric motor includes winding hairpins arranged to form one or more phases. The stator includes a plurality of motor teeth forming a plurality of slots each configured to accommodate multiple layers. A first set of winding hairpins spanning of M slots are coupled in series and coupled to a phase lead, and are arranged sequentially in a first azimuthal direction. A jumper is arranged in a layer and is coupled in series with the first set of winding hairpins. A second set of winding hairpins configured to span of M slots are coupled in series between the jumper and a neutral lead. The second set of winding hairpins are arranged sequentially in the opposite azimuthal direction, and along with the first set of winding hairpins and the jumper, form a continuous electrical path between the phase lead and the neutral lead.

Abstract: A brushless electrical machine with permanent magnet excitation, designed for propulsion, in particular of boats, pumps, electric vehicles, for operation as a servomotor, etc. The brushless electrical machine provides increased power at significant reduction of the weight and the inertia moment of its rotor. The rotor (11) comprises an outer (12), intermediate (13) and inner (14) steel rings. The surface of the poles of the rotor (11) is formed by interconnected cut-out parts (15). In the rotor (11), above the permanent magnets (17) are formed elongated axial slots (20). By number of poles 2 p less than 16 and at a diameter of the rotor (11) greater than 0.15 m, the axial slots (16) are divided into two equal parts by a third radial rib (25) with maximum width 0.0025 m, which is located under the middle of the cut-out part (15) and is connecting the intermediate ring (13) to the outer ring (12).

Abstract: The motor includes a sealing material (dry body of a liquid gasket 41) interposed between a joint surface 3b of a motor housing 3 and a joint surface of an inverter housing, and an O-ring 39. The O-ring 39 is interposed between the motor housing 3 and the inverter housing and disposed so as to surround the communication port 3a1 of the refrigerant flow path 3a. The motor housing 3 includes a groove 3d disposed between the sealing material and the O-ring 39 on the joint surface 3b in a surface direction of the joint surface 3b.

Abstract: An axial flux electric machine comprises a stator including a plurality of stator core segments each comprising a lamination comprising a plurality of layers. A first soft magnetic composite (SMC) portion is arranged adjacent to the plurality of layers of the lamination. An insulating layer arranged between circumferential side surfaces of the plurality of layers of the lamination and the first SMC portion. A rotor is arranged axially adjacent to the stator and including a plurality of permanent magnets. The rotor and stator are configured to generate magnetic flux that is aligned parallel to an axis of rotation of the rotor.

Abstract: A rotor includes: a rotor core in a shape of a shaft; a permanent magnet; and a connecting member interposed between the rotor core and the permanent magnet and connecting the permanent magnet to the rotor core. The connecting member contains a thermally conductive filler made of a non-magnetic material. Only ends of the filler have magnetism, and the ends are in contact with either or both of the rotor core and the permanent magnet.

Abstract: A rotor includes magnets and a core including arcuately arranged pole segments. Each pole segment includes first and second prongs that extend away from the rotor axis and are at least in part arcuately spaced apart to define a cutout therebetween. Each pair of arcuately adjacent pole segments defines therebetween a respective magnet-receiving slot, with the first prong of one of the pole segments and the second prong of the other of the pole segments defining the slot. The magnets are received in slots, such that each of the magnets is at least in part interposed between one of the pairs of adjacent pole segments. The magnets and the pole segments are dimensioned and configured so that at least one of the first and second prongs is deflected by the magnet received in the respective slot, such that the prongs cooperatively apply a clamping force on the magnet.

Abstract: A rotor includes: a shaft; a tubular rotor core; and a plurality of magnets. The shaft extends along a center axis. The rotor core surrounds the shaft. The plurality of magnets is disposed outside the rotor core in a radial direction and is aligned in a circumferential direction. A plurality of first recessed portions recessed outward in the radial direction is aligned in the circumferential direction in an inner surface of the rotor core in the radial direction. Each of the first recessed portions overlaps each of the magnets in the radial direction.

Abstract: An electric motor for use with a power tool includes a rotor having a body, a stator having a plurality of electromagnetic coils surrounding the rotor, an output shaft coupled to the rotor for rotation with the rotor, and a plurality of magnets positioned within the body of the rotor. The motor also includes a mechanical magnet holder coupled to at least one of the rotor and the output shaft to engage each of the plurality of magnets. The mechanical magnet holder inhibits movement of the plurality of magnets out of the body of the rotor.

Abstract: The rotor with a non-through shaft for a rotary electric machine comprises a cylindrical magnetic body clamped between two half-shafts, each comprising an attachment flange connected to the magnetic body, axial housings being uniformly provided in the magnetic body on at least one diameter of the magnetic body in order to house conductive bars. At least one attachment flange comprises insertion holes, each arranged facing a housing for inserting the conductive bars into the housings and the exterior diameter of the attachment flange is substantially equal to the exterior diameter of the magnetic body, the attachment flange comprising as many insertion holes as housings.

Abstract: A rotary electric machine includes a stator extending along an axis and having teeth arranged about the axis. The teeth are circumferentially spaced apart by slots. Conductors extend around the teeth and through the slots. The conductors are electrically connected to one another to form phases. A cooling device is provided in at least one winding slot. The cooling device includes an outer tube and an inner tube provided in the outer tube such that cooling fluid flows in a first axial direction within the inner tube and a second axial direction opposite the first axial direction within the outer tube.

Abstract: A stator includes a wound member that includes a wound portion extending in a radial direction, and a pair of outer extension portions which extend in a circumferential direction from a radially outer end portion of the wound portion, and a coil wound on the wound portion. On an inner side in the radial direction of a base portion of the outer extension portions, a concave portion is recessed radially outward from the winding outermost diameter position. The first layer of the coil includes a first coil, a center of which is positioned radially inward from the winding outermost diameter position and in a range between 0.5 times a coil wire diameter and 1.5 times the coil wire diameter with respect to the winding outermost diameter position, and a second coil, a part of which is disposed in the concave portion on the radially outer side of the first coil.

Abstract: A stator to be provided in an electric rotating machine includes a stator core and a distributed winding coil. The stator core has a plurality of slots. The distributed winding coil includes a plurality of segment coils coupled to each other. Each of the segment coils is accommodated across a pair of slots out of the plurality of slots. The distributed winding coil has a coil structure including a plurality of parallel coils coupled to each other in series. Each of the parallel coils includes two or more of the segment coils. The two or more segment coils are coupled to each other in parallel and are accommodated across the same pair of slots out of the plurality of slots. The two or more segment coils included in each of the parallel coils are disposed adjacent to each other in a radial direction in the same pair of slots.

Abstract: A vibration motor having an insulating housing, a bidirectional coil and a magnetic ring is provided. The insulating housing is of cylindrical shape and at least three position-limiting ribs are protruded from an internal surface thereof. Each position-limiting rib is extended parallel to a central axial line of the insulating housing. The insulating housing has a pair of end plates on two ends thereof. The end plates are made of insulating material. The bidirectional coil is accommodated in the insulating housing and spaced apart from the internal surface of the insulating housing. The magnetic ring is movably accommodated in the insulating housing, and the magnetic ring is arranged coaxially with the insulating housing to surround the bidirectional coil. The position-limiting ribs are disposed adjacent to the magnetic ring and surround an outer edge of the magnetic ring.

Abstract: A motor includes a rotor configured to rotate with a shaft. The rotor includes a plurality of yoke portions and a plurality of holding portions each corresponding to a space portion provided between the adjacent yoke portions and configured to hold therein a magnet. At least one of the plurality of yoke portions includes a tab portion extending towards the holding portion and configured to hold the magnet held in the holding portion. The holding portion includes an insertion space provided between a first end portion of the yoke portion in an axial direction of the shaft and the tab portion. The insertion space allows the magnet to be inserted into the insertion space towards an inner side in a radial direction of the shaft.