Abstract: A stepper motor device has a stator and a rotor. The rotor comprises: a shaft; a rotor core associated with the shaft; and a magnet fixed to the rotor core. The stator comprises: a stator shell; a yoke disposed within the shell; a coil wound about the yoke and an end plate magnetically connecting the yoke to the stator shell. The coil is located beside the magnet in the axial direction of the motor. The stator has a number of salient poles, and the salient poles are arranged to face the magnet across a small air gap. The coil creates magnetic poles in the salient poles with a common polarity.

Abstract: A winding assembly for a motor includes a base having a supporting face. A winding includes two ends and a plane that is in intimate contact with the support face of the base. A packaging body encloses the base and the winding. Two electrical connection members are respectively connected with the ends of the winding. Each electrical connection member is partially exposed outside the packaging body.

Abstract: An electric servomotor for a power-assisted steering system in a vehicle has a stator laminated core having an outer diameter and an active length. In order to provide an electric servomotor for a power-assisted steering system that has an optimum diameter/length ratio and that covers a steering performance range from compact cars to full-size vehicles using a reasonable change in volume, it is provided that, with a constant outer diameter, the ratio of the outer diameter to the active length of the stator laminated core can be varied such that the electric servomotor can be used for power-assisted steering systems for compact cars up to full-size cars and the outer diameter is constant.

Abstract: The present invention relates to a six-phase generator for a motor vehicle having two three-phase systems displaced with respect to one another by 30°, the phase windings of one of the three-phase systems being positioned in a wye connection and the phase windings of the other three-phase system being positioned in a delta connection.

Abstract: In a wire-connection structure of a motor, bus rings each formed by a bent wire material into a substantially annular shape and arranged along a stator includes: a plurality of large diameter portions and a plurality of small diameter portions extending alternately in a circumferential direction; and a plurality of link portions extending in a radial direction and connecting the adjacent large diameter portion and small diameter portion to each other. Windings of the coils are wire-connected to the link portions. Therefore, it is unnecessary to form the link portions of the bus rings into a U-shape or double-wire overlapping shape, thereby facilitating processing. Moreover, the width of the wire-connection portion in the circumferential direction does not exceed the thickness of a single wire material, thereby facilitating connection work by a crimping tool in a narrow space.

Abstract: An alternating current generator comprising: permanent magnet means for generating a rotating magnetic field; armature means for containing at least two field windings adjacent to said permanent magnetic field and within said rotating magnetic field; a primary winding said armature means, said primary winding being of connection to a load; and a secondary winding offset from said primary winding on said armature, said secondary winding being connected to a capacitive load.

Abstract: In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss part formed in the base part. The disk part is composed of a metal plate of ferromagnetic substance (iron plate) and another substance plate (made of resin or rubber and the like, for example,) of a smaller spring constant or a larger damping coefficient than that of the metal plate. The metal plate and another substance plate are laminated. Another substance plate absorbs or reduces the impact force when the plunger is electromagnetically attracted toward and collides with the base part. The propagation of a large impact noise or crashing sound is thereby suppressed, and as a result the impact noise can be reduced.

Abstract: A brushless motor-generator includes a rotor having a ferromagnetic tube with radially polarized, alternating polarity permanent magnet poles, and an air core armature that magnetically exerts torque upon the rotor. The magnetic poles drive magnetic flux across a radial magnetic air gap inside of the tube and through windings of the armature that are located in the air gap. The windings utilize wire that is comprised of multiple individually insulated strands that are bundled together and sheathed in an outer electrically insulating serve that separates adjacent windings and provides a higher dielectric breakdown strength than the insulation on the individually insulated strands.

Abstract: Method for mounting a gradient coil in a cylindrical magnet of a magnetic resonance system and associated magnetic resonance system, wherein the exterior of the gradient coil is foam-bonded flat against the inner wall of the magnet at least in sections, at least one element being foamed in place during mounting, thus creating at least one continuous channel, said channel being used for the insertion of a cutting and/or separating tool for ripping open the foam bond between the gradient coil and the cylindrical magnet.

Abstract: The wire winding height of the first teeth over which the head portion moves is lower than the wire winding height of the second teeth over which is out of the moving range of the head portion. The first wire winding portion is formed so as to be radially longer than the second wire winding portion. With the configuration mentioned above, the number of winding of the wire around the first teeth (243a) is maintained without reducing the torque and varying the uniformity of the magnetic force in the circumferential direction which the stator generates.

Abstract: The segment connection type electric rotating machine includes a stator coil constituted by phase coils each of which includes a U-shaped segment continuum formed by U-shaped conductor segments inserted into slots of a stator core, an I-shaped leading conductor segment inserted into one of the slots and connected to a lead end of the U-shaped segment continuum, and an I-shaped terminating conductor segment inserted into one of the slots and connected to a terminal end of the U-shaped segment continuum. A connector box fixed to the outer periphery of the stator core. A power supply lead is laid between the connector box and the I-shaped leading conductor segment. The power supply lead is welded at a tip portion thereof to an end portion of the I-shaped leading conductor segment in the vicinity of head-side coil ends of the stator coil.

Abstract: A tool and method for winding and forming a field coil for field assembly, such as a stator, includes separable tool halves defining a winding cavity therebetween. The winding cavity receives magnet wire that is wound therein, such as by rotating the tool or a winding nozzle. The magnet wire generally conforms to the shape of the winding cavity such that when the tool halves are separated, a field coil having a net shape is produced. Once the magnet wire is sufficiently deposited within the winding cavity, wires of the coil may be bonded together either through a resistive heating process such as by passing an electrical current through the coil or through other heating or chemical bonding methods to thereby maintain the net shape of the field coil once it is removed from the tool.

Abstract: A system and method for generating a magnetic field in a rotating machine. In one embodiment, a primary winding assembly is configured to generate a rotatable magnetic field. The assembly is connected to receive multiple signals of different phases to effect field rotation. A set of secondary windings is positioned for generation of current based on magnetic coupling during the field rotation. The secondary windings include conductor capable of supporting superconducting current flow. A rotatable machine includes a stator and a rotor winding coupled for rotation with respect to the stator. The secondary windings are formed in a circuit for providing superconducting current through the rotor winding.

Abstract: A motor comprises a yoke as casing, a shaft extending along a center of the yoke, an annular stator fixed to the yoke and an armature fixed to the shaft to rotate with the shaft inside the stator. The armature comprises a plurality of teeth on the outer circumferential surface. A wire is wound on any of the teeth to form a normal coil. Another wire is wound on another of the teeth to form a brake coil that is a short circuit. When the motor rotates much faster, the brake coil produces magnetic flux which acts as load against the rotation of the motor to allow the motor to rotate slower.

Abstract: A rotor for an exciter to be used to energize the field winding of a generator-rotor of a generator, the rotor defining an axis and including at least two conductor bars aligned substantially parallel to the axis. The bars are connected on their first axial end to one of a plurality of collecting ring and on their second axial end individually to one of two rings. By means of at least one diode the flow of current in each bar is allowed in only one direction such that an alternating current induced in the conductor bars due to a static field is converted into a direct current in the two rings.

Abstract: The present invention relates to a slotless winding for a rotating electric machine and a manufacturing method thereof. The slotless winding includes at least one flexible printed circuit board having at least one circuit, and one piece of flexible printed circuit board(s) is curved or a plurality of pieces of flexible printed circuit board(s) is mutually combined to form a barrel shape, thereby simplifying the procedure of manufacturing the slotless winding, improving production speed and reliability, and enabling diversified designing schemes to meet the demands of the rotating electric machine. In addition, it is not necessary for the coil winding to be cured for assembling, and assembling yield is thus enhanced.

Abstract: A terminal plate set has multiple terminal plates and fitting legs. Each terminal plate has a transverse bar portion and a longitudinal bar portion. If the fitting legs of the terminal plate set are press-fit into fitting through holes, terminals of the transverse bar portions are positioned on an axial end side of a rotor, and terminals of the longitudinal bar portions are positioned on the other axial end side of the rotor. The length of the transverse bar portions are adjusted so that the terminals of the transverse bar portions are positioned near coil wire leads to be connected with the terminals of the transverse bar portions.

Abstract: An automotive alternator includes a stator winding that is made of a metal other than copper and copper alloys. The alternator also includes a built-in rectifier that includes a plurality of rectifying elements and a plurality of electrical conductors. The rectifying elements and the electrical conductors together form a rectification circuit for rectifying AC power output from the stator winding into DC power. Further, at least one of the electrical conductors includes first and second portions. The first portion is connected to at least one of the rectifying elements, and made of copper or a copper alloy. The second portion is connected to the stator winding, and made of a metal containing a metallic element that is also contained in the metal of which the stator winding is made.

Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having laminations forming salient poles, a commutator fitted to the shaft adjacent one end of the rotor core, windings wound about poles of the rotor core and terminated on the commutator, the windings each being wound around a single pole of the rotor; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings.

Abstract: A stator assembly is provided for a multi-phase motor. The stator assembly includes a stator with a plurality of teeth and a plurality of slots defined between the teeth. In addition, the stator assembly includes a plurality of windings representing respective phases of the multi-phase motor. The windings are wound within the slots and around the teeth to define respective magnetic poles. Further, each slot includes no more than a single turn or small number of turns of any given one of the plurality of windings.

Abstract: A laminated iron core includes a plurality of stacked iron core pieces punched out from a thin steel sheet material, each iron core piece including a plurality of slot holes for receiving coil windings. At least one electrically insulating sheet piece is stacked on an outer surface of a lowermost iron core piece. The electrically insulating sheet pieces include a spindle hole and a plurality of slot holes which have a substantially similar configuration to, but are smaller than, the slot holes of the iron core pieces whereby edges of slot holes of electrically insulating sheet pieces extend outwardly beyond edges of slot holes of iron core pieces. Burrs formed at edges of slot holes of iron core pieces are covered with edges of slot holes of electrically insulating sheet pieces so that a coil can be wound safely without directly contacting the burrs.

Abstract: In a connection arrangement (10) for the stator winding of a turbo machine with two or more parallel circuits of individual conductors (26, 29) per phase, the individual conductors belonging to one phase form a phase group (25, 28) and run directly adjacent to one another in the stator body, the individual conductors of the winding are each connected from a winding connection (21, . . . , 24) to an external connection (15, . . . , 20) via a phase ring (32), which runs concentrically with respect to the machine axis (33). A simplification of the manufacture and assembly as well as a reduction in space requirements and an improvement in the thermal properties are achieved by the phase rings (32) of a phase group each being led together as a phase ring group (11, . . . , 14) from the winding connections (21, . . . , 24) to the external connections (15, . . . , 20).

Abstract: Electric motors, for example wet rotor motors, include a rotor, a winding support, and plurality of electrical windings surrounding the rotor. In some implementations, the winding support is a rotor housing, e.g., the can of a wet rotor motor. The windings define the stator of the motor.

Abstract: A permanent magnet type three-phase ac generator includes a stator having 3n (n is an integer) teeth and a tree-phase armature winding and a rotor having 4n magnetic poles each of which has a permanent magnet. The three-phase winding includes 3n coils each of which is wound around one of the teeth and connected to form three phase windings, and each coil wound around a first tooth is connected to another coil wound around another tooth that is fourth from the one of the teeth so that vectors of voltage induced in the connected coils can direct in the same direction.

Abstract: A travelling field machine with a stator and a rotor which are separated by an air gap and each of which comprises at least one stator coil or one rotor coil, with the stator or the rotor, respectively, comprising a soft magnetic iron body with a stator or rotor back, in which spaced grooves are formed, generating teeth, and in each of the grooves several conductor bars of the stator coil or the rotor coil, respectively, are arranged in series comprising end connectors arranged at the faces of the stator or the rotor, respectively, which connect the conductor bars extending across at least one groove, with the conductor bars comprising conductor portions of different length projecting beyond the faces of the stator or rotor, respectively, and the end connectors being arranged in a stacked fashion in the axial direction at the faces of the stator or the rotor.

Abstract: A busbar (10) has a plurality of straight portions (14) circumferentially arranged at intervals. Several such busbars (10) are tied at a plurality of circumferential spaced positions by connecting the straight positions (14) in parallel with one another. The, the busbars (10) can be positioned with high precision and will not be circumferentially displaced from each other. This can avoid the deviation of intervals between the tabs (16) and those between terminals (18) from correct ones.

Abstract: The invention relates to a synchronous machine provided with a stator and rotor, wherein the stator comprises stator teeth (1) provided with respective tooth tips in the bore hole thereof and tooth coils guided around the stator teeth (1), the rotor core discs (2) and a shaft are arranged and permanent magnet poles are formed on the external side of the rotor by means of permanent magnets (4), a pole gap (3) is provided in the rotation direction of the rotor between two magnetic poles, respectively, and is filled with a magnetically conductive material, the stator teeth (1) angle is equal to or less than 85% of a pole pitch angle or the stator teeth (1) angle is equal to or greater than 115% of the pole pitch angle.

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: A first armature winding and a second armature winding each include a tubular member, a first conductor arranged in a radially inner side of the tubular member, and a second conductor arranged in a radially outer side of the tubular member. The first conductor includes a first coated portion, which is coated by a coating formed from an insulator, and a first wire connection portion, which is free from the insulator. The second conductor includes a second coated portion, which is coated by a coating formed from an insulator, and a second wire connection portion, which is free from the insulator. The first wire connection portion and the second wire connection portion are electrically connected to each other. A large output is obtained from a slotless motor including the first armature winding and the second armature winding.

Abstract: A three-phase electrical drive machine is described, comprising a static primary part (2) having a sequence of stator grooves (3), in which stator windings (4) of the three phases (U, V, W) are positioned in such a manner that an electric current through the stator windings (4) generates primary part magnetic poles, and a secondary part (5), which is movable on a predefined movement path in relation to the primary part (2) and on which permanent magnets (6) are positioned in such a manner that one of each of their poles faces toward the primary part (2), resulting in a sequence of secondary part magnetic poles in the movement direction, a movement of the secondary part (5) on the movement path being caused by interaction of the primary part magnetic poles, which result from the flow of current, with the secondary part magnetic poles.

Abstract: A high torque AC motor of the repulsion type that includes at least four stator poles and an armature with chordally oriented windings. The armature windings are cyclically shorted and opened in groups at appropriate angular positions of the armature by a non-contact switch circuit carried on the armature.

Abstract: In a stator of a rotary electric machine that includes a stator winding and a stator core having a plurality of slots, the stator winding is constituted of a plurality of series-connected regular U-shaped segments each of which has a pair of in-slot portions and a plurality of U-shaped irregular segments each of which has a pair of in-slot portions disposed in a pair of slots that is suitable to connect the regular segments to form the stator winding and a continuous crossover portion crossing over some of the regular segments. The irregular U-shaped segments extend to be in contact with the turn portions of the regular segments. Therefore, the regular segments are connected by the irregular segments that have least electric resistance.

Abstract: In a method for winding the stator of a multiphase electric motor a plurality of mutually spaced stator teeth are assigned to each phase, wherein all the teeth of the stator are wound without a break in the winding wire, and wherein the winding wire is taken via a contact-making element of a contact-making device before or after the winding of all the stator teeth assigned to a phase.

Abstract: An automotive alternator including a rotor having a plurality of poles; a plurality of phases in operable communication with the plurality of poles; and a stator core in operable communication with the rotor, the stator having a number of slots defined by: S=(P×PH)+((M×PH)+N) where S=number of slots P=number of poles PH=number of phases M=a whole integer greater than or equal to 0 N=a whole integer selected from a group of integers ranging from, and including, 1 through the number of phases minus 1. A method for reducing magnetic noise in an automotive alternator includes selecting a number of poles, selecting a number of phases, selecting a number of stator core slots, the foregoing selections interacting in the automotive alternator to produce an order of frequency of a tangential force different than any multiple of the number of phases and different than an order of frequency of a radial force of the alternator.

Abstract: In installations including fixed and mobile structural elements and a rotary current motor as a drive, the rotary current motor can be used for the wireless transmission of both energy and/or data. The transmission from the fixed structural elements to the mobile structural elements of the rotary current motor is especially inductive. In the corresponding device including a rotary current motor including a stator and a secondary element, the secondary element is not embodied as a solid conductor with or without a laminated core, according to prior art, but rather as a laminated core including integrated windings which is the same as, or similar to, the stator.

Abstract: A wind power installation has a (ring) generator which has a stator in which grooves are provided at the inner or outer periphery in mutually spaced relationship to receive a stator winding. In order to provide a stator having a winding, in which the susceptibility to trouble as a consequence of the high loading on the generator is substantially reduced, the stator winding is wound without interruption continuously throughout.

Abstract: An armature for use in a motor has a plurality of teeth, a plurality of slots and coils of three kinds of phases. A plurality of the slots is formed between the coadjacent teeth. The coils of three phases are wound around the teeth. The armature has a coil structure, according to which radial force acting on a specific tooth is greater than radial force acting on another tooth. A peak value of the radial force acting on the specific tooth is approximated to a peak value of the radial force acting on another tooth in such a manner that a flux path in and/or adjacent to the specific tooth is made narrower than a flux path in and/or adjacent to another tooth.

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: An electrical rotating machine wherein the coil end portion and slot straight portion of a coil conductor are coated with insulation layers respectively. The insulation layers are different in thickness or insulation material, and an electric field lessening layer is coated on the coil conductor or the insulation layers.

Abstract: The present invention relates to a unipolar current electrical machine operable as a switched reluctance motor, comprising a motor structure and a control unit. The motor structure comprises a plurality of disk-shaped annular stator elements stacked and spaced equidistantly from each other and mounted on a frame; a plurality of disk-shaped rotor elements mounted on a rotational axis and spaced equidistantly from each other such that successive rotor elements are positioned between successive stator elements; a plurality of electrical windings on each of the stator elements, which when energized with a current flow, produce a magnetic field in a direction substantially parallel to the axis; and a return path for completing a magnetic flux path in a second direction perpendicular to the first direction on successive stator elements and through the rotor elements for generating a rotational force in the rotor elements; and a rotor position sensor. A rotor position sensor provides a signal to the control unit.

Abstract: A winding for use in a superconducting electric generator having a rotating rotor assembly surrounded by a non-rotating stator assembly is provided. The winding comprises at least one conductor structure associated with a component in the superconducting electric generator. The conductor structure comprises a plurality of conductive elements formed from a high temperature superconductive material. At least a portion of the conductive elements is arranged in a transposed relationship. A protective shell is positioned about the conductive elements and formed from a high strength alloy suitable for cryogenic temperatures.

Abstract: The invention relates to a brushless DC motor having an at least two-pole permanent magnet rotor and an at least two-pole stator whose poles carry an at least single-strand stator winding which can be energized with a current according to the rotor position by means of an electronic commutation device, there being a substantially uniform cylindrical air gap between the rotor and the stator. The rotor is characterized in that at least one stator pole, or a specially provided auxiliary pole having an auxiliary winding, is provided which is energized with a current to start up the motor. In accordance with a preferred embodiment of the invention, the auxiliary winding can additionally be used as a sensor winding to determine the position of the rotor.

Abstract: A horizontal axis washing machine includes a clothing receptacle rotated by a 4 pole rotor. A 36 slot stator having an interior bore with an interior diameter receives the 4 pole rotor in magnetic coupling relation and capable of operating within a flux weakening range of at least 5:1. The stator has a ratio of an interior diameter to a minimum exterior diameter greater than or equal to 0.63:1.

Abstract: A combined motor-battery system comprising an electric power source adapted to convert self-originating electrical current to mechanical power utilizing a set of common functional structures. Preferred embodiments include an electrochemical cell comprising field reactive electrodes that directly produce extractable mechanical forces in the presence of a magnetic field.

Abstract: A stator has conductor segments serially wound on a core. Each segment inserted in one of slots of the core has a slanting portion protruding from the slot and inclined toward circumferential and axial directions of the core. Each slanting portion has an oblique portion with a film removal surface and a film removal portion with a film removed surface to have a slanting removal area covered with no insulation film and extending on the oblique portion. Each film removal portion has a connection portion on an end thereof. The connection portions are aligned along a radial direction of the core to form a plurality of end pairs. The connection portions of each end pair are connected with each other so as to serially connect the segments with one another.

Abstract: The invention relates to an electrical asynchronous machine comprising a stator and a rotor. The stator has a stator winding system comprising a plurality of toothed coils which are partially arranged in stator grooves. The rotor has a rotor winding system consisting of a plurality of short-circuited electrical lines arranged in the rotor grooves (7). The rotor comprises eleven, thirteen, seventeen or twenty-seven rotor grooves (7). In this way, losses caused by harmonic waves and torque ripple are reduced.

Abstract: In a rotary electric machine, a field coil member includes a first edgewise coil composed of a plurality of coaxially layered convolutions. The coaxially layered convolutions are wound around the outer periphery of the first pole core. The field coil member includes a second edgewise coil composed of a plurality of coaxially layered convolutions. The coaxially layered convolutions are wound around the outer periphery of the second pole core. The field coil member includes a link portion connecting between the first edgewise coil and the second edgewise coil in series. One of the first and second edgewise coils has one coil end extending therefrom to cross over the link portion at a crossover portion thereof. The crossover portion between the one coil end and the link portion is arranged to be non-overlapped with the convolutions of the one of the first and second edgewise coils.

Abstract: A method is disclosed for arranging and exciting the stator, rotor and various windings of a multi-stage brushless high frequency alternator so that the resulting multiple high frequency sub-phase armature winding outputs can be rectified and commutated into three phase power frequency alternating current (AC) electrical output. Power frequency currents in field windings control output amplitude, output frequency, and output phase. Devices incorporating this arrangement are suitable of generating fixed frequency electrical power while accommodating variable speed rotation of a generator shaft and offer multiple advantages over existing techniques. The capability to generate speed independent electric power allows natural power sources such as windmills and hydro-power stations to be efficiently coupled to fixed frequency power grids.

Abstract: A motor-generator for converting between electrical and rotational energy includes a rotor mounted for rotation about an axis of rotation relative to a stationary a stator that magnetically interacts with the rotor. The rotor has two spaced apart rotor portions that define therebetween an armature airgap. Magnetic poles on the rotor portions drive magnetic flux across the airgap. An air core armature is located in the airgap, such that opposite sides of the air core armature face the two opposed rotating surfaces of the rotor. The air core armature has windings in which AC voltage is induced as the rotor rotates. The windings are wound with multiple individually insulated strand conductor wire wrapped with a wrapping of a thin dielectric tape film over the multiple individually insulated strand conductor wire.

Abstract: Disclosed is a rotor winding including a winding strip configured to be disposed with a rotor, and at least one notch defined by a portion of the strip.