Abstract: A plurality of auxiliary magnets is embedded in a rotor core so as to surround the rotation axis of the rotating electrical machine in the cross-section orthogonal to the rotation axis. A plurality of main magnets is embedded in the rotor core so as to extend from the auxiliary magnet in the outer circumferential direction of the rotor. A plurality of magnetic poles of the rotor is formed around the rotation axis, the magnetic poles each having the auxiliary magnet and the plurality of main magnets arranged at a distance from each other in the circumferential direction of the rotor, and the plurality of main magnets of each magnetic pole is arranged asymmetrically about a virtual line passing the rotation axis and axisymmetrically dividing the auxiliary magnet of each magnetic pole.

Abstract: The invention relates to a magnet-retaining spring (11), to an electric machine (10) containing such a magnet-retaining spring, and to a method for producing the electric machine (10), in particular for the motorized adjustment of moving parts in a motor vehicle, wherein the magnet-retaining spring (11) has a first leg (90) and a second leg (91), which are connected to each other by means of a bow (92), and the first and second legs (91, 92) span a plane (88) in space, wherein the bow (92) protrudes from the spanned plane (88).

Abstract: The invention relates to a brush-commutated electrical machine. The machine includes a rotor with rotor coils which are arranged on rotor poles. The machine also includes a commutator with commutator laminations which are electrically connected to the rotor coils, and having two brushes which are arranged offset in relation to one another, with the result that the brushes alternately commutate when the rotor moves. The machine also includes a stator having stator poles which are arranged in the circumferential direction and at least some of which are provided with stator magnets, wherein the stator poles are designed and/or arranged such that an alternating stator magnetic field which is generated by said stator poles in the circumferential direction is formed differently depending on the pole direction of the respective stator pole.

Abstract: In a DC motor, a permanent magnet rotor comprising a shaft, a rotor sheet packet supported by the shaft, which rotor sheet packet comprises close to the periphery thereof completely closed and tangentially extending rectangular recesses for receiving planar permanent magnet plates. At least one permanent magnet plate is accommodated in each recess, the permanent magnet plates are held by spring elements free of play by force locking, the recesses have free spaces connected to the permanent magnet plates in the tangential direction, which free spaces extend across the major part of the side surfaces of the permanent magnet plates and the rotor sheet packet consists essentially of a radial outer annular region and a radial inner core region, wherein the annular region in a large part is delimited by the recesses and the free spaces and is integral with the core region via thin radial webs.

Abstract: A method of making a cylindrical magnetic circuit which is able to prevent deformation of a cylindrical yoke for holding two or more magnets without increasing the thickness of the yoke more than required, A method of producing a cylindrical magnetic circuit (1) for generating a magnetic field in a space inside of plural annularly placed magnets (2), including: a cylindrical yoke (3) which is placed radially outside the magnets (2) and is fixed to the magnets directly or via an intermediate member or substance; and at least one nonmagnetic member (4) existing between pairs of circumferentially adjacent magnets.

Abstract: The described embodiments relate generally to cooling fans and more specifically to a method for balancing an impeller assembly included in a cooling fan. In one embodiment, a balancing ring with an asymmetric shape can be included in an impeller assembly and rotated to correct an unbalance in the impeller assembly. In another embodiment, a balancing ring assembly can be provided including an inner balancing ring and an outer balancing ring. The size and shape of the inner balancing ring can be modified to better correct any unbalance in the impeller assembly.

Abstract: The invention relates to a rotor or stator for an electric machine, in particular a spoke rotor which is arranged concentrically about a rotational axis and comprises a permanent magnet which is arranged in a recess of the rotor or stator. A spring strand for fixing the permanent magnet in the recess is provided in the rotor or stator, said spring strand comprising a holding ring and fixing means which are arranged on the holding ring. Said holding ring is arranged concentric about the rotational axis, and the fixing means extend in the axial direction of the rotor or stator into the recess. The holding ring is annular and the fixing means lie at least partially directly on the permanent magnets. The invention also relates to an electric machine comprising the claimed rotor. The invention further relates to a hand-held machine comprising a motor having a rotor or stator of the above-mentioned type.

Abstract: When the magnet holding spring is in the deployed state of the plate-like shape, the auxiliary pole is beforehand fixed to one of the side-plates, then the magnet holding spring is bent into a “]”-like sectional shape. As a result, the magnet holding spring and the auxiliary pole that are assembled integrally constitute the sub-assy. Convex parts are formed on the auxiliary pole. The auxiliary pole is fixed to one of the side-plates by press fitting the convex parts to the fitting holes formed on one of the side-plates. The auxiliary pole is laid on one of the side-plates in the direction of a plate thickness for positioning before forming the convex parts on the auxiliary pole. In the positioned state here, by embossing the auxiliary pole, the convex parts are formed on the auxiliary pole, and at the same time, the convex parts are press fit into the fitting holes thus the auxiliary pole is fixed to one of the side-plates.

Abstract: A rolled pole housing for an electric motor includes a sealed enclosure formed by a frame body, a flange and an end cap. Therefore, the rolled pole housing may be used in both sealed and unsealed applications.

Abstract: The invention relates to a heat sink arrangement with a heat sink element, with a cylindrical interior, in particular a housing of an electric motor or housing part for such, with power electronics integrated into the housing or housing part, with at least one electronics component attached to the heat sink element from inside, in which the heat sink element is a sector of a cylinder adapted to the cylindrical interior of the heat sink arrangement, and that a springy clip is present that presses onto the ends of the sector such that the heat sink element is pressed against the cylindrical interior by spreading, as well as to an electric motor, a housing part and a springy clip.

Abstract: The invention relates to a device for fixing permanent magnets inside the cylinder head of a field winding of an electric engine. The inventive device comprises spring clips (12) which are disposed between the permanent magnets in order to ensure the angular positioning and the axial and radial support of said magnets against the inner wall of the head. The end of each clip (12) which first penetrates the head when the permanent magnets are being inserted, comprises means for axially sliding on the inner cylindrical wall of the head, while preventing any contact with an end edge of the clip. Moreover, the clip is set apart from the head by means of at least one boss (17) which is provided on the core (16), and said boss is in turn set back from the edge and disposed between two fins (14) for the axial locking of the magnets.

Abstract: A rolled pole housing for an electric motor includes a sealed enclosure formed by a frame body, a flange and an end cap. Therefore, the rolled pole housing may be used in both sealed and unsealed applications.

Abstract: A yoke assembly for a stator of a starter motor is disclosed including auxiliary poles and magnet springs, with each of auxiliary poles and each of the magnet springs taking the form of a subassembly. The subassembly, composed of each of the auxiliary poles preliminarily mounted on each of the magnet springs, is fixedly secured to an inner peripheral wall of a yoke. This allows the subassemblies to be easily assembled to the yoke in the same process as that in which a yoke assembly is assembled using the magnet springs in the absence of the auxiliary poles, providing assembling processes in common with an increase in mass production effect.

Abstract: A small-sized motor having a polygonal outer shape includes four or more field magnets attached to the inner surface of a motor casing made of metal. A tubular portion of the motor casing is formed into a polygonal tubular shape such that flat side portions equal in number to field poles, and flat or curved corner portions equal in number to the field poles and each being located between the adjacent side portions are sequentially joined together. The field magnets have a smaller thickness at portions corresponding to the side portions of the motor casing and a larger thickness at portions corresponding to the corner portions of the motor casing. The field magnets are fixed while coinciding in center position with the corresponding corner portions of the motor casing and while being pressed against the corresponding corner portions of the motor casing from inside.

Abstract: A yoke assembly for a stator of a starter motor is disclosed including auxiliary poles and magnet springs, with each of auxiliary poles and each of the magnet springs taking the form of a subassembly. The subassembly, composed of each of the auxiliary poles preliminarily mounted on each of the magnet springs, is fixedly secured to an inner peripheral wall of a yoke. This allows the subassemblies to be easily assembled to the yoke in the same process as that in which a yoke assembly is assembled using the magnet springs in the absence of the auxiliary poles, providing assembling processes in common with an increase in mass production effect.

Abstract: An electric motor includes a housing that receives multiple magnets that are circumferentially arranged in the housing. A resilient member has two inserted portions that are respectively inserted into gaps formed among the magnets. For example, four inserted portions of the two resilient members are respectively inserted into four gaps formed among four magnets, so that the inserted portions are resiliently deformed in the gaps. The inserted portions apply force to the magnets such that the magnets are circumferentially spaced from each other. Thus, the four magnets are urged onto an inner wall of the housing by the two resilient members. As a result, movement of the magnets is restricted in both of the circumferential direction and the axial direction of the housing. Therefore, the magnets can be maintained in the housing using a simple structure without increasing the number of components.

Abstract: An electric rotary machine and a magnet holder for holding a main magnet pole on an inner periphery of a yoke of the electric rotary machine are disclosed. The magnet holder includes a dorsal base plate fixedly secured to the inner periphery of the yoke at equally spaced intervals in a circumferential direction of the yoke, a pair of sidewalls, formed on both sides of the dorsal base plate for admitting an interpole magnet to eliminate a leakage of magnetic fluxes of circumferentially neighboring two of main magnet poles, and held in pressured contact with sidewalls of the circumferentially neighboring two of the main magnet poles, and elastic segments extending from the pair of sidewalls in cantilever structures, respectively, for retaining the interpole magnet in a fixed place. Each elastic segment has a tapered shape to be less susceptible to vibration in excess from an engine.

Abstract: A small-sized motor having a polygonal outer shape includes four or more field magnets attached to the inner surface of a motor casing made of metal. A tubular portion of the motor casing is formed into a polygonal tubular shape such that flat side portions equal in number to field poles, and flat or curved corner portions equal in number to the field poles and each being located between the adjacent side portions are sequentially joined together. The field magnets have a smaller thickness at portions corresponding to the side portions of the motor casing and a larger thickness at portions corresponding to the corner portions of the motor casing. The field magnets are fixed while coinciding in center position with the corresponding corner portions of the motor casing and while being pressed against the corresponding corner portions of the motor casing from inside.

Abstract: A rotor is provided so that a rotor-side end part of a rotation shaft is rotatably supported by a bearing accommodated in a bearing accommodating part provided in a bottom part of a yoke in such a way as to project to a rotor side, and a part of an armature winding wound around a core surrounds the bearing accommodating part through an insulator.

Abstract: An electric motor has a unitary frame. The frame includes locating structure extending from an end portion thereof. The motor includes a shaft and an armature disposed within at least a portion of the frame and constructed and arranged to rotate the shaft. A commulator is associated with the shaft. Windings are carried by the armature and connected to the commulator. Permanent magnet structure is carried by the frame and is disposed generally adjacent to the armature. At least one brush arm is coupled to an associated locating structure. A brush is coupled with an associated brush arm so that the brush engages the commutator to deliver electric current to the windings. A structure, containing iron, is disposed about at least a portion of the permanent magnet structure to define a flux path for the motor.

Abstract: Rotor for an electric motor that comprises a core (1), segments of a cylinder (5, 6, 7) made of magnetizable materials, a substantially cylindrical retaining wrapper (10) whose end portions are joined to at least a pair of plane elements (8, 9). The rotor also comprises first elastic means (11, 12, 13) having a length that is not smaller than the length of the core and being supported by means (2, 3, 4) that are integrally provided in the core parallelly to the axis of rotation (X) of the rotor, which interfere with contiguous longitudinal edges of the segments of a cylinder so as to keep said segments circumferentially spaced from each other. In a preferred manner, the rotor also comprises second elastic means (21-26) which are adapted to make up for the longitudinal and radial plays of the various parts of the rotor so as to ensure that the outer surface of the segments of a cylinder keeps in contact with the inner surface of the wrapper. The invention further relates to a method for producing the rotor.

Abstract: A fastening spring for fastening at least one component accommodated in a housing of an electric motor, in the prior art, has a bending zone which is exposed to strong mechanical stresses. A fastening spring (1, 1′) of the invention has at least a second bending zone, so that the mechanical stresses are distributed over two bending zones.

Abstract: An electric motor 10 has an armature 12 including windings 14. The armature is constructed and arranged to rotate a shaft 16. The motor includes a commutator 18 and a brush card assembly 20 having brushes to engage the commutator and conduct electrical current to the windings. A permanent magnet structure 21 is disposed about the armature. A frame assembly 22 carries the permanent magnet structure. A coil spring structure 36, containing iron, is disposed about and contacts the permanent magnet structure to define a flux path of the motor.

Abstract: An electric motor for a fuel pump wherein fuel flows through the pump, includes spring elements provided for holding magnetic shells in the stator have a face which points toward a rotor and is flush with the magnetic shells. Turbulence in the flow of the fuel within the electric motor are thereby kept particularly low. The pressure loss during the flow through the electric motor thus becomes lower. The pump according to the invention consequently has high efficiency.

Abstract: A rotary electric machine includes a plurality of permanent magnet main poles disposed on an inner periphery of a yoke and a plurality of auxiliary poles respectively disposed between neighboring two of the main poles via magnet fixing members and a plurality of magnet fixing members. The magnet-fixing member is comprised of a U-bent elastic metal plate having a pair of circumferentially opposite walls that provides a pole space. The opposite walls are respectively bent inward at edges thereof in circumferentially opposite directions to be opposed to each other. The bent edges have and elastic projections and are separated at the axial ends to form an elastic retaining member. The auxiliary pole is inserted into the auxiliary pole space by opening the elastic retaining member.

Abstract: A rotary electric machine includes a plurality of permanent magnet main poles disposed on an inner periphery of a yoke and a plurality of auxiliary poles respectively disposed between neighboring two of the main poles via magnet fixing members and a plurality of magnet fixing members. The magnet-fixing member is comprised of a U-bent elastic metal plate having a pair of circumferentially opposite walls that provides a pole space. The opposite walls are respectively bent inward at edges thereof in circumferentially opposite directions to be opposed to each other. The bent edges have and elastic projections and are separated at the axial ends to form an elastic retaining member. The auxiliary pole is inserted into the auxiliary pole space by opening the elastic retaining member.