Abstract: An insulator to be attached to a laminated core of a rotating electrical machine includes a frame-shaped body which surrounds the laminated core and around which a coil wire is wound, and first and second flanges provided at both open sides of the body. The second flange has a first recess that extends toward the body.

Abstract: A wiper motor includes a reduction mechanism (26) contained in a reduction mechanism containing chamber (27) of a gear frame (21) and configured to reduce and transmit a rotation to a worm wheel (35); and a motion conversion mechanism (29) contained in a motion conversion mechanism containing chamber (30) of the gear frame (21) and configured to convert and output a rocking motion to an output shaft (28). A support surface (37) set up flush with the other end surface (35b) of the worm wheel (35) in the axial direction rotatably contained in the reduction mechanism containing chamber (27) is formed on the inner surface of the bottom wall (30a) of the motion conversion mechanism containing chamber (30). The support surface (37) is formed over the entire area facing a pinion gear (40) and the motion conversion member (41) on the bottom wall (30a) of the motion conversion mechanism containing chamber (30).

Abstract: A holding element (68, 82) for attaching magnets (62) to a rotor (20) of an electrical machine (10). This electrical machine is, in particular, designed as an AC generator and comprises intermediate spaces (60) between the individual poles (24, 25). The holding element (68, 82) comprises a top side (72) and spring lugs (70) which axially fix the magnets (62). The holding element (68, 82) has claw-like projections (74) which bear against flanks (80) of the poles (24, 25) when the holding element (68, 82) is in the fitted state.

Abstract: A rotating portion of a spindle motor includes a rotor magnet, a circular plate portion, and an annular raised portion that projects downward from the circular plate portion. A stationary portion includes a stator, a base portion, and an annular recessed portion configured to accommodate the raised portion. The raised portion includes an inner circumferential surface and an outer circumferential surface. The inner circumferential surface is positioned radially opposite a first side surface of the recessed portion with a first minute gap intervening therebetween. The outer circumferential surface is positioned radially opposite a second side surface of the recessed portion with a second minute gap intervening therebetween. The first minute gap has an axial dimension greater than an axial dimension of a seal portion.

Abstract: The electric motor includes a rotor and a stator, the stator having a conductive wire wound thereon via a stator core and insulators. The insulators include an annular outer peripheral wall portion with the conductive wire run on an outer periphery side of the peripheral wall portion, a plurality of winding body portions protruding radially from the outer peripheral wall portion, and an inner flange portion. The outer peripheral wall portion on the winding body portion side includes an outer peripheral surface formed in an arc shape. The radial thickness of the outer peripheral wall portion is increasingly greater toward the circumferential center of the winding body portions.

Abstract: An electric vehicle drive device includes a casing; and a plurality of motor generators mounted in the casing, each of the motor generators including a plurality of fastening portions at which a stator of the motor generator is fixed to the casing, and a number of the fastening portions of one of the motor generators being coprime to a number of the fastening portions of at least one of the rest of the motor generators.

Abstract: The present invention provides a mounting arrangement for an electric motor in a drive unit, and a drive unit incorporating such a mounting arrangement. The arrangement includes a motor casing with at least one connecting flange having an opening for receiving a connecting element. The flange is configured for fastening the motor casing to a drive unit housing via the connecting element. At least one alignment member is provided on the flange for engagement with a complementary member on the drive unit housing to align the motor casing with respect to the drive unit. The at least one alignment member is provided on or in a peripheral edge of said connecting flange.

Abstract: A linear motor includes a case, a magnet assembly and a coil assembly. The case is disposed along a first direction. The magnet assembly includes at least two first magnets, among which the first magnets are disposed corresponding to and between two first magnetic yokes, respectively. The coil assembly includes a winding coil having an exposed portion, among which the exposed portion is extended along a second direction and disposed between the two first magnetic yokes, and the exposed portion is at least partially overlapped with the two first magnets in a third direction. As a result, the coil assembly and the case are driven to reciprocate along the first direction by the winding coil due to the magnetic force, thereby solving the magnetic disturbing issue, enhancing the driving force of the linear motor, and optimizing the mechanical rigidity.

Abstract: A rotor (1) comprising a plurality of alternating magnetic poles formed by permanent magnets (3) distributed regularly between a circumferential portion (5) and a central portion (6) of the magnetic body (2) of the rotor and defining circumferential pole sections (7). The circumferential portion comprises axial grooves (15) which are arranged between the pole sections facing the magnets and which form openings in recesses (4) containing the magnets. The openings have a pre-determined first width (a) such as to minimize a leakage magnetic flux (PhiL) flowing through the circumferential portion (5) and to maximize a useful magnetic flux (PhiU) flowing radially through each of the pole sections (7).

Abstract: Disclosed therein is a stator assembly, which includes a circular base part and a stator core having a plurality of teeth radially formed on an outer face of the base part and respectively having a tooth end portion. The stator assembly further includes: a magmate holder including a base plate, at least one inner leg and at least one outer leg formed at a lower portion of the base plate, and a power connector part formed on an upper portion of the base plate and having a joining projection formed at one side thereof; and a sensor cover including a body part and a hook formed on a lower portion of the body part and being joined with the joining projection.

Abstract: A linear power generator includes a columnar or cylindrical center yoke made of a soft magnetic material and an outer yoke made of a soft magnetic material. In the center yoke, rod-shaped permanent magnets magnetized in a circumferential direction are arranged in the circumferential direction in an outer circumference of the center yoke such that opposed magnetic poles of the permanent magnets adjacent to each other become identical, the permanent magnets are extended in an axial direction, and the center yoke includes plural center-side projecting portions linearly arranged in the circumferential direction. The cylindrical or columnar outer yoke includes plural winding portions, plural groove portions, and an outer-side projecting portion. The winding portions are arranged in the circumferential direction about a center axis. The groove portions are arranged at positions opposed to the permanent magnets.

Abstract: Through a housing of an electric motor, an output shaft attached to a rotor penetrates. In this housing, an air tightness test hole of the electric motor which communicates with internal space of the electric space formed with the housing and a stator is formed. Further, an oil seal which blocks aeration between the internal space and an outside of the electric motor is attached to this housing.

Abstract: An armature assembly comprising an armature body and a number of armature ring segments mounted on the armature body, wherein the armature assembly comprises a number of insertion interface elements and a number of complementary receiving interface elements for mounting an armature ring segment onto the armature body; whereby an insertion interface element is realized to engage with a complementary receiving interface element in a direction essentially parallel to a rotation axis of the armature; and wherein an insertion interface element is formed as an integral part of the armature body or as an integral part of an armature ring segment. A method of assembling an armature is also described, and a wind turbine comprising such an armature assembly is provided.

Abstract: Disclosed is a motor, the motor according to an exemplary embodiment of the present disclosure including a rotation shaft having an alignment groove at a distal end of one side from a rotation center, a sensing magnet disposed at the distal end of one side of the rotation shaft by being mounted on the alignment groove of the rotation shaft, a rotor including a magnet coupled to a periphery of the rotation shaft, and a stator including a core wrapping an ambient of the rotor and wound with a coil.

Abstract: A rotor for a rotary electric machine, the rotor including first and second pole pieces each having a respective magnetic hub arranged for rotation about an axis along which they are spaced. Pluralities of magnetic first and second pole fingers are spaced from each other and extend between the hubs. Each pole finger has a proximal end connected to its respective hub, and an axially opposite distal end. The first and second pole fingers circumferentially alternate about the axis, and each pole finger has a respective radially inner surface defining a cavity that extends axially from the distal end to a cavity terminus. Relative to each pole finger, at a respective axial position between the distal end and the cavity terminus the radial distance between the axis and the radially inner surface is substantially greater inside of the cavity than outside of the cavity.

Abstract: A spindle motor having a turntable is disclosed, the spindle motor including a rotating rotation shaft, a turn table coupled to the rotation shaft to rotate along with the rotation shaft, and formed at a central upper surface with an accommodation groove, and a torque enhancement member coupled to the rotation shaft, and arranged inside the accommodation groove of the turn table to enhance a rotational torque of the turn table by depressing the turn table.

Abstract: The present invention provides a sintered magnet having superior residual magnetic flux density and coercive force. The sintered magnet of the present invention comprises a group of R-T-B based rare earth magnet crystal particles 2 having a core 4 and a shell 6 covering the core 4, the mass ratio of a heavy rare earth element in the shell 6 is higher than the mass ratio of a heavy rare earth element in the core 4, and the thickest part of the shell 6 in the crystal particles 2 faces a grain boundary triple junction 1. A lattice defect 3 is formed between the core 4 and the shell 6.

Abstract: The invention relates to a thrust washer (28) for an electric machine (10, 12) intended to be arranged on a shaft (16) between a bearing (18) and a rotor (14), preferably a rotating electrical contact element (24) impacted by brushes (38), and/or a disk pack (36) of the rotor (14). The thrust washer (28) is provided with an area for sealing having two end faces (32, 34). On each end face (32, 34), at least one radial abutment section (50, 52) for the bearing (18), or the rotor (14), is provided. The thrust washer (28) according to the invention is characterized in that it is made of at least one hard component (54) and one soft component (56), wherein the part of the radial abutment section (50, 52) abutting the rotor (14) and/or the bearing (18) is formed by the soft component (56).

Abstract: An electric machine includes a first magnetic pole with an arrangement of interposed magnetically active layers and magnetically inactive layers, and a second magnetic pole movable relative to the first magnetic pole and spaced from the first magnetic pole by a gap. An electrical conductor operates as a coupling element between an electrical circuit and a magnetic circuit. At an operating time, a common useful magnetic flux for electromechanical energy conversion flows through the magnetic circuit composed of the first magnetic pole, the gap and the second magnetic pole. The magnetically inactive layers have a lower average density than the magnetically active layers. A ratio (k) of the total volume of the magnetically active layers to the combined total volume of the magnetically active and inactive layers fulfills the condition 0.5?k?0.8 A method for producing an electric machine are also disclosed.

Abstract: Hand-held machine tool having an outer housing extending substantially along a longitudinal axis, with an electric drive unit accommodated in this outer housing, and with a tool arrangement which is disposed at a first end of the electric drive unit. The outer housing of the machine tool has a defined inner contour and the electric drive unit and the tool arrangement have a defined outer contour. The outer contour and the inner contour of the outer housing are at a predetermined minimum spacing from each other. At least one inlet opening for cooling air is disposed in an end region of the outer housing. The electric drive unit drives a fan arrangement which draws in through the at least one inlet opening cooling air which flows substantially parallel to the rotational axis of the electric drive unit through the machine tool and flows out of the outer housing to the outside at the outer contour of the machine tool.