Abstract: A magnetic core is described comprising a stack of electrical steel sheets with a known preferential direction of permeability. In the stack the preferential direction of permeability of successive single sheets and in addition or alternatively of successive groups of sheets differs by a predetermined shift angle. Further the use of a magnetic core is described.

Abstract: A so-called gap winding motor capable of preventing a rotation detector from being affected by noise generated by a stator coil connection portion and decreasing the size and cost is provided. The gap winding motor comprises a stator including a stator core, a plurality of stator coils arranged on an inner peripheral surface of the stator core, a ring-shaped coil connection board configured to connect the plurality of stator coils, and ring-shaped shield patterns provided at both surfaces of the ring-shaped coil connection board. The stator core, the coil connection board, and the shield patterns are encapsulated with resin, and a rotation detector mounting printed circuit board is arranged in a gap located at an inner side of the stator core.

Abstract: Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain exemplary stators for use in transverse and commutated flux machines may be configured with gaps therebetween, for example in order to counteract tolerance stackup. Other exemplary stators may be configured as partial stators having a limited number of magnets and/or flux concentrators thereon. Partial stators may facilitate ease of assembly and/or use with various rotors. Additionally, exemplary floating stators can allow a transverse and/or commutated flux machine to utilize an air gap independent of the diameter of a rotor. Via use of such exemplary stators, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.

Abstract: A direct drive generator for a wind turbine is provided. The direct drive generator includes a stator arrangement and a rotor arrangement. The stator arrangement and/or the rotor arrangement include an at least partly flexible front and/or rear endplate. The endplate is at least partly made of fiberglass.

Abstract: The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine.

Abstract: An electric motor includes: a rotor configured to rotate about a rotating shaft; a stator having a coil; and a mold resin configured to mold the stator. The stator includes: an inner peripheral bus ring which is provided along an inner periphery of the stator and which is connected to the coil; and an outer peripheral bus ring which is provided along an outer periphery of the stator and which is connected to the coil. The inner peripheral bus ring is provided at a position deeper than a position of the outer peripheral bus ring in a direction of the rotating shaft.

Abstract: The electric rotating machine includes a fixed stator fixed to the inner circumferential side of a housing, a moving stator rotatably supported on the inner circumferential side of the housing, a rotor disposed concentrically on the inner circumferential side of the fixed stator and the moving stator, and a moving stator drive formed of a gear and a motor for rotating the moving stator by a predetermined angle. The moving stator drive is detachable with respect to the housing. Coil leader lines are stored in an internal part of the housing so that the moving stator is capable of rotating by a predetermined angle.

Abstract: A stator coil of a slotless motor is disclosed in which the stator coil is formed in such a manner that respective both distal ends of two unit coil bodies, each unit coil body arranged to face each other, are respectively coupled to form a plurality of circular coil bodies, each circular coil body having a different inner diameter, and a circular coil body having a smaller inner diameter is sequentially inserted into an inner side of a circular coil body having a larger inner diameter, whereby a horizontal width of the plurality of unit coil bodies of U, V and W phases is equal there among to cause the strength of the magnetic field of U, V and W phases to be equal, and to allow the stator to be accurately manufactured, thereby catering to a designer's intention and markedly simplifying the assembly processes.

Abstract: Embodiments of the invention provide for conical magnets for rotors in electrodynamic machines, methods to design the same, and rotor-stator structures for electrodynamic machines. In various embodiments, a rotor-stator structure for electrodynamic machine can include field pole members and conical magnets. According to at least some embodiments, one or more of the conical magnets can include a magnetic region configured to confront one or more air gaps. The magnetic region can be substantially coextensive with one or more acute angles to the axis of rotation. The magnetic region can also include a surface positioned at multiple radial distances from the axis of rotation in a plane perpendicular to the axis of rotation.

Abstract: A middle electric motor drive unit for an electric bicycle, including a motor, a controller, a sensor, a gear reducer, a one-way clutch, a chain tightener, and a housing. The middle electric motor drive unit is disposed below a frame of the electric bicycle, and in the vicinity of a pedal shaft thereof. The middle electric motor drive unit is independent from the pedal shaft with respect to functions and structure. The motor is an internal rotor and permanent magnet DC motor. The motor shaft of the motor is parallel to a gear shaft and the pedal shaft. The controller is built-in, and disposed in or on the housing. The sensor is an internal sensor or an external pedal shaft sensor.

Abstract: The permanently excited synchronous machine (1) includes a rotor (3) and a stand (2) which contains a three-branched winding system (8) which comprises tooth coils. The stand (2) has a total of three or six grooves (5) and a tooth (6, 7) is formed there between. A total of three tooth coils (9) are arranged in the grooves (5) and each coil is associated with one of the three winding phases. The number of user pole pairs (pN) is four or five. The rotor (3) has twice as many user pole pairs (pN) of permanent magnets (18) which are evenly distributed on the periphery.

Abstract: A rotary actuator includes a stator assembly positioned within an outer enclosure. A rotor assembly is positioned adjacent to the stator and is configured to rotate relative thereto and about a centerline axis of the rotary actuator. Each of the outer enclosure, the stator assembly, and the rotor assembly are arranged to carry a magnetic flux therethrough and form a flux path loop, such that as a magnetic flux flows through the outer enclosure, the stator assembly, and the rotor assembly, a torque is generated by rotation of the rotor assembly relative to the stator assembly.

Abstract: Permanent magnet motors with improved torque ripple and methods for designing the same have been provided. The permanent magnet motor can include a stator having a hollow core and defining a plurality of slots; a winding disposed in each of the slots; a rotor rotatably disposed inside the hollow core of the stator; and a plurality of permanent magnets supported by the rotor. Each of the slots has a slot opening, and at least one of the slot openings can be off-center with respect to the respective slot.

Abstract: An image stabilization apparatus for stabilizing an image sensor is disclosed. The image stabilization apparatus includes a transmission component whereon a slot is formed. The image stabilization apparatus further includes a rotary motor including an annular rotor connected to the transmission component, and an annular stator disposed on a side of the annular rotor. The annular rotor is capable of rotating relative to the annular stator. The image stabilization apparatus further includes a carrier for carrying the image sensor. The carrier includes a shaft disposed inside the slot in a slidable manner. The image stabilization apparatus further includes a linear motor coupled to the transmission component and the shaft of the carrier for driving the carrier to slide inside the slot.

Abstract: To provide an electric compressor in which the occurrence of shrink-fitting failures can be prevented when a stator is shrink-fitted in a motor case.

Abstract: The invention concerns a direct drive or directly driven generator for a wind turbine comprising a stator and a rotor, wherein the stator comprises a stator ring comprising several ring-segment-shaped stator segments each having at least one stator element for the power generation and wherein the rotor comprises a rotor ring pivotable around a centre axis of the generator, the rotor ring comprises several ring-segment-shaped rotor segments each having at least one rotor element for the power generation. Furthermore the invention concerns a wind turbine comprising such a direct drive generator.

Abstract: A superconducting device includes a coil formed of a superconducting wire, an iron core to which the coil is attached, and a magnetic material arranged in a magnetic circuit and magnetized by magnetic flux. The magnetic circuit is generated by energization of the coil and passes through the iron core. A gap is formed between the coil and the iron core, or/and a nonmagnetic material is interposed between the coil and the iron core.

Abstract: Dynamoelectric device and stator bar therefor, where the stator bar includes a linear portion for positioning in a slot of a stator core, the slot extending in a radial direction relative to an axis of the stator, and an end arm portion having an involute-on-cone bend relative to the linear portion and an elongated cross-section that is substantially aligned with the radial direction of the slot.

Abstract: A rotating electric machine, comprising a stator, a rotor, a case storing the stator and the rotor, and an oil pump. Oil discharge ports are formed at the terminal part of an oil discharge passage of the case, and a cooling oil is supplied to the upper cutout parts of the stator. A groove part is covered by a cover to form a closed flow passage. Since the cooling oil is sufficiently applied to the portion of a coil exposed to the inside of the flow passage, a cooling efficiency is increased. Also the cooling oil is guided to an orifice on the lower side in the gravitational direction. Accordingly, since the cooling oil does not flow in an air gap between the rotor and the stator, a power loss can be prevented from occurring.

Abstract: A motor may include a rotor provided with a rotor shaft, a cylindrical bearing made of resin material and provided with a bearing part for rotatably supporting a shaft end of the rotor shaft, and a bearing holder provided with a through-hole into which the cylindrical bearing is inserted. The cylindrical bearing is slidably held in the through-hole and at least one of a first end face where the bearing part is formed and a second end face which is an opposite end face to the first end face is formed with a ring-shaped groove. Therefore, a wall thickness of resin for forming the bearing can be made thinner and thus shrinkage of the side wall part of the bearing which faces an inner peripheral face of the through-hole of the bearing holder is reduced.

Abstract: Embodiments of the invention relate generally to electric motors, alternators, generators and the like, and more particularly, to stator structures and rotor-stator structures for motors that can be configured to, for example, reduce detent.

Abstract: An axial gap type motor/generator is provided with a stator, a rotor and an alternating current control device. The alternating current control device executes alternating current control of a single phase or multiple phase alternating current flowing in the coils. The alternating current control device includes a superpositioning control section and a frequency component control section. The superpositioning control section produces the alternating current by superpositioning a plurality of frequency components including a first order fundamental wave component and a plurality of higher harmonic wave components that have frequencies equal to integer multiples of a frequency of the fundamental wave components and are of orders that are equal to values of the integer multiples. The frequency component control section controls a relationship among the frequency components such that two pairs of the frequency components whose orders differ by two are aligned with respect to each other.

Abstract: A rotating electrical machine, especially a turbogenerator, includes a rotor and a stator, which concentrically surrounds the rotor and is terminated at each of the two axial ends by a laminated press plate (14), which is constructed from a stack of individual press plate laminates (30). The electrical properties are improved by providing the press plate laminates (30) at least partially with slits (26) for reducing the eddy current losses.

Abstract: A motor stator mounting device includes a plastic motor housing having a cylindrical housing section for receiving the stator. Longitudinal ribs along an inside surface of the housing section are inclined to converge gradually in a distal direction, thus tending to center a stator inserted distally into the housing section. An annular stator retaining member includes a plurality of distally extending centering features. Outside surfaces of the centering features interact with an interior surface of the housing section to center the retaining member as it is inserted distally. Inside surfaces of the centering features interact with a proximal region of a previously inserted stator, such that distal insertion of the retaining member both axially positions and radially centers the stator relative to the cylindrical housing. The retaining member is secured to the housing with a series of sonic welds to positionally fix the stator inside the housing.

Abstract: A BLDC electric motor assembly (24) includes a rotor (42) having a plurality of magnet segments (50) securely retained thereabout by an annular ring (68) which is shrunk in situ in an electromagnetic forming operation. The magnet segments (50) are formed with tongues (62, 64) on their upper and lower ends (56, 58). One tongue (64) seats in a retaining pocket (48) molded on the rotor shaft (40), whereas the other tongue (62) provides a ledge into which the ring (68) seats. After the magnet forming operation, wherein the ring (68) is shrunk, the outer surface of the ring (68) is flush with the outer surfaces (54) of the magnet segments (50).

Abstract: A motor includes a stator core that forms a magnetic path and has a plurality of tooth parts along a circumferential direction; a tooth provided in each tooth part to wind a coil there around; and an extension part alternated with the tooth part along a circumferential direction of the stator core, convexly extending to an inner radial direction.

Abstract: A cassette coil comprising an insulator bobbin including a core tube around which a wire coated with an insulating film is wound, forming a coil, and a pair of plate-shaped flanges provided at both ends of the core tube, the flange including a cutout portion opening in a side, wherein the cassette coil includes an insulation wall between a winding start part which is one end of the coil of the wire and an outermost wire part located on the outermost side of the coil of the wire and close to the flange.

Abstract: A stator includes a bracket having a shaft bearing portion at a center, a stator base including a flexible printed wiring board outwardly attached to the shaft bearing portion, single-phase air-armature coils disposed on the stator base, and a drive circuit member disposed on the stator base so as not to overlap with the single-phase air-core armature coils. The bracket has a through hole at the section corresponding to the bottom of the drive circuit member. The stator base is embedded at least partly in the thickness direction in the through hole and fixed using a resin, and a detent torque generation member is contained in, and is no thicker than, the stator base.

Abstract: A synchronous motor with permanent-magnet rotor, of the type comprising a stator with corresponding windings and a rotor arranged between pole shoes formed by the stator. The stator is constituted by two C-shaped ferromagnetic bodies whose ends form two pairs of pole shoes. Respective spools with windings are arranged along the ferromagnetic bodies. The two pairs of pole shoes are angularly mutually offset so that two pole shoes, each belonging to a distinct ferromagnetic body, are internal with respect to the angular configuration thus formed and the other two pole shoes are external with respect to the same angular configuration. The external pole shoes have a same axial height and wrap around a same axial portion of the rotor.

Abstract: Disclosed is a stator of reciprocating motor comprising: a stator including two lamination assemblies formed accordingly as a plurality of lamination sheets are stacked as a cylindrical shape or a circular are shape; and a mover inserted into an air gap between said two lamination assemblies and linearly reciprocating. In the stator, the lamination sheets constituting the lamination assembly are thicker at an outer circumference side of the lamination assembly than at an inner circumference said thereof. According to this, a path of a flux applied to the lamination assembly is maximized thus to minimize a resistance of the flux.

Abstract: A superconducting device includes a coil formed of a superconducting wire, an iron core to which the coil is attached, and a magnetic material arranged in a magnetic circuit and magnetized by magnetic flux. The magnetic circuit is generated by energization of the coil and passes through the iron core. A gap is formed between the coil and the iron core, or/and a nonmagnetic material is interposed between the coil and the iron core.

Abstract: A terminal module includes a ring-shaped rail having a groove extending in a circumferential direction, a bus bar fitted into the groove, and a connector portion having a connector terminal connecting the bus bar with an external wire. The rail has a phase determining hole for determining a phase of rotation of the rail about an axial direction.

Abstract: In a stator core composed of a powder compacted magnetic body, a yoke part comprises a protrusion protruding from an axial end face of a tooth. The tooth has an axial length gradually decreases towards an outside along the radial direction of the stator core, and a circumferential length which gradually increases towards an outside along the radial direction of the stator core. In one of the cross sections of stator core perpendicular to a radial direction, the height difference between axial end faces of the yoke part and the tooth is substantially equal to an axial length of a coil end part. Further, a cross-sectional area of the tooth perpendicular to the radial direction is substantially maintained constant along the radial direction, and the cross-sectional area is secured at a junction between the tooth and the yoke part, while half of the cross-sectional area is secured in a circumferential cross section of the yoke part.

Abstract: The invention relates to a stator module for a synchronous machine with transversal flux guidance, in particular a transversal flux machine having at least one phase, having a stator unit that is provided for the single phase and bearing an armature winding and that, in the assembled position, is provided for a rotor with the formation of an air gap, which is arranged in the radial direction in relation to the axis of rotation of the rotor of the synchronous machine. Said stator unit comprises two rows of teeth that are arranged in succession in the circumferential direction, the rows being connected together by means of a yoke unit for conduction of the magnetic flux. The invention is characterized by the following features: the yoke has an annular design; the yoke unit comprises magnetic lamination sheets stacked in succession in the circumferential direction.

Abstract: A core comprises a plurality of core split members having yoke portions and tooth portions and arranged in such a circumferential shape that the yoke portions contact with each other while the tooth portions being directed inward. The core further comprises a ring contacting with the yoke portions, and stoppers mounted on the outer face sides of the yoke portions for fixing the ring on the yoke portions. The yoke portions and the ring are formed in corrugated shape to mesh with each other, and the stoppers are formed with projections that engage with the inner side of the ring. This structure provides both the rotating electrical machine core having the core split members arranged in the circumferential shape and fastened to each other while preventing occurrence of a stress and a positional displacement between the core split members, and a rotating electrical machine.

Abstract: In a stator core having “N” slots, a tooth-width centerline of a linear yoke and a first extension line extended horizontally from a center of rotary shaft toward the linear yoke form a first angle. Assume there are first point on the first extension line at a first distance from the center, a second extension line drawn at a second distance horizontally from the center toward the linear yoke and extended vertically toward arc-shaped yokes, and a third extension line drawn from the center toward teeth ends of the linear yokes with angle “K”. The second and third extension line intersect at a second point. A line between the first and second points intersects with the first extension line, thereby forming the first angle. In this structure, 0<a<b, and (360/2N?60/2N)°<K<(360/2N+60/2N)° are established, where “a”, “b” are the first and the second distances respectively.

Abstract: A stator includes a base board, a plurality of coil patterns patterned on one face of the base board, a stator core having a ring-like portion formed in a ring-like shape, a plurality of teeth base ends of which are fixed to the ring-like portion and front end portions formed respectively at front ends of the plurality of teeth in which the coil patterns and the teeth are laminated onto the base board to be respectively opposed to each other, and covers having base members bonded to the base board in a state of being respectively fitted to the plurality of teeth and covering surroundings of the respective teeth and conductive patterns patterned to inner faces of the base members and electrically connected to the coil patterns.

Abstract: An electric motor includes an annular stator core having a pair of ends opposed to each other in an axial direction, and a coil wound around the stator core. The stator core includes a pair of powder magnetic cores each arranged at the pair of ends and a laminated steel plate arranged between the paired powder magnetic cores. Each of the paired powder magnetic cores includes a section arranged outside the coil in the axial direction.

Abstract: A method of manufacturing a laminated stator core includes: forming a band-shaped yoke core piece having a shape that a yoke of the laminated stator core is developed in a straight line and having concave connection portions in the inner circumferential edge thereof by punching a metal plate; forming a laminated yoke body by winding and laminating the band-shaped yoke core piece in a spiral shape and coupling the laminated band-shaped yoke core piece in a caulking manner; forming a magnetic core piece having a convex connection portion at the base end thereof by punching a metal plate; forming a laminated magnetic body by laminating and coupling a predetermined number of the magnetic core pieces to each other in a caulking manner; and coupling the laminated yoke body and the laminated magnetic body to each other by winding a coil around the laminated magnetic body and then inserting the convex connection portions into the concave connection portions.

Abstract: A brushless a-c motor (BACM) (10) consisting of a non-conductive stator (12) and a rotor (44). The rotor (44) has an outer surface (50), a right surface (34) and a left intermediate surface (16) from where extends a protrusion (20) having a cavity (26) into which is inserted a motor support rod (38). The stator (12) includes a multiplicity of longitudinally extending wiring notches (36) and on the left intermediate surface (16) and the right surface (34) are wire attachment structures (18). Around and between the structures (18) and the notches (36) is wound a multiplicity of insulated wires (32) that terminate at an a-c power source (180). The rotor (44) has an inner surface (48) that has longitudinally attached a multiplicity of magnets (56) and is attached to a bearing (80) that is attached to the central protrusion (20). To operate the BACM (10), one end of a circular belt (98) is placed around the rotor (44) and the opposite end is inserted over a work piece.

Abstract: Certain exemplary embodiments comprise a system, which can comprise a radial magnetic bearing static portion. The radial magnetic bearing static portion can comprise a plurality of electromagnets. The radial magnetic bearing static portion can comprise a plurality of pulse width modulated amplifiers, each of which can be adapted to provide electrical energy to a corresponding electromagnet of the plurality of electromagnets.

Abstract: A vibration motor includes a housing, a stator (10) received in the housing (30) and a rotor (20) rotatably disposed in the stator. The stator includes two claw-pole assemblies (11) arranged back-to-back, and a shaft (23) being fixedly connected with the two claw-pole assemblies. The rotor includes a bearing (22) rotatably mounted around the shaft, a permanent magnet (26) mounted around the bearing, and an eccentric weight (24) fixedly attached to the permanent magnet. The eccentric weight includes a main body (240) and at least one inserting portion (244) having a density higher than that of the main body.

Abstract: A pointing actuator comprises a spherical base; a plurality of coils wound around an outside surface of the spherical base, wherein at least one coil is wound along latitudinal lines around at least a portion of the spherical base, and at least one coil is wound along longitudinal lines around at least a portion of the spherical base; at least two magnets positioned such that at least a portion of a magnetic field produced by the at least two magnets passes through at least a section of the plurality of coils, wherein current is selectively provided to one or more of the plurality of coils such that a force is generated which causes the at least two magnets to move; and at least one data sensor coupled to at least one of the at least two magnets.

Abstract: A stator includes an elongate core defining an inner volume to receive a rotor of an electric machine. The core includes a yoke and an array of teeth extending from the yoke toward the inner volume. The array of teeth defines slots between each pair of adjacent teeth in the array. Each slot includes a first slot region adapted to hold at least a portion of a conductive winding and a second slot region adapted to hold at least a portion of a conductive winding. The first slot region is defined by two non-parallel opposing slot side portions, and the second slot region is defined by two parallel opposing slot side portions.

Abstract: In a state in which a first divisional core and a second divisional core are arranged in a state spaced from each other and adjacent to each other, a first coil and a second coil are each wound around a tooth. The first coil and the second coil are in the same phase. In a state in which a plurality of divisional cores are arranged annularly so that their teeth are oriented in a radially inward direction, the first divisional core and the second divisional core are not adjacent to each other in the circumferential direction. A plurality of connection wires are shaped to converge at an end surface of a stator core. This facilitates the winding of the coils around the divisional cores. Further, the connection wires can be shortened.

Abstract: The invention relates to a stator for an electric machine, which has a core comprised of laminated sheet metal (1), the pole teeth (2) of each laminated sheet metal (1) of the core being connected to one another via respective webs (3). The laminated metal sheets (1) of the core are made from a two-state steel and, in the area of the pole teeth (2), have a high relative permeability and, in the area of the webs (3), have a section (5, 6, 7) with a low relative permeability.

Abstract: A stator core is formed by arranging divided cores (20) in a circumference direction in cylindrical shape. On an upper end surface (60) of a core back (50) of the divided core, holes (62, 64) are made. Then, on the upper end surface, a reinforcing ring (40) having through holes (66, 68) is arranged, and is connected with rivets (70, 72). Thus, stress is transmitted not only through a side surface (58) but also through the reinforcing ring (40), between the adjacent divided cores. Thus, strength of the stator using a powder magnetic core is ensured and a space is saved.