Abstract: An electrical armature having a wiring board embodying conductive plates with wire end receiving terminals to receive and hold the wire ends of the coils while they are fused to the terminals.

Abstract: A corona suppression apparatus for a dynamoelectric machine having a stator coil (12) covered with a corona suppression covering (16), the apparatus including a member (10) conducting to ground (20) abutting a top layer (28) of the corona suppression covering proximate an overlap region (18) of the corona suppression covering. The member may be positioned in a gap (30) between the stator coil corona suppression covering and a stator core clamping finger (24) extending from the stator core proximate the stator coil. The member may also be configured to exert a compressive force on the overlap region by being compression biased between the corona suppression covering and the stator core clamping finger.

Abstract: A stator winding is configured into a polyphase alternating-current winding by joining together end portions of a plurality of winding sub-portions in a vicinity of each of axial ends of coil end groups within a predetermined circumferential range. Covers are fitted onto each of ancillary connection portions constituted by joint portions between the end portions of the plurality of winding sub-portions so as to closely fit onto an inner circumferential surface, an axial end surface, and an outer circumferential surface of each of the ancillary connection portions, the covers each being filled with a first electrically-insulating resin.

Abstract: A rotary electric machine stator includes a stator core having plural slots and a stator winding that is composed of plural conductor segments. Each conductor segment has a straight portion disposed in the slot and connection ends projecting from the slots and welded to another. The connection ends to be welded cross each other at an angle larger than zero degree.

Abstract: The invention relates to a stator for an electric motor. Said stator has an annular stator package having a plurality of stator teeth. An annular interconnection unit is located on the end face of said stator package. Said annular interconnection contains diverting elements. The interconnection unit has a support component which is provided with a cavity and has slots. Provided in said cavity are a multiplicity of mutually electrically insulated connector rings each having contacting elements routed externally through said slots.

Abstract: A method of manufacturing a winding includes steps of twisting U-shaped conductor segments, inserting straight portions of the twisted conductor segments in slots of a stator core, bending ends of the straight portions in a circumferential direction of the stator core and joining the ends. The method further includes a step of pressing turn portions of the U-shaped conductor segments by a turn portion twisting apparatus such that widths of the turn portions reduce in radial directions. The pressing step is performed simultaneously with the twisting step. Alternatively, the pressing step is performed after the twisting step.

Abstract: In a stator of a rotary electric machine, a stator winding is wound through slots of a stator core. The stator winding is constructed of conductor segments. Each of the conductor segments includes a slot inside portion held in the slot and a slot outside portion extending from the slot inside portion and located outside of the stator core. The slot outside portion is bent in a circumferential direction of the stator core. An insulating member is provided between an inner wall defining the slot and the conductor segments in the slot. The insulating member forms a deformed portion having the shape corresponding to a bent shape of the slot outside portion. Alternatively, the insulating member forms a deformed portion that is easily deformed when the conductor segments are bent and contact the insulating member.

Abstract: An extended stator core in a motor/generator can be utilized to mitigate losses in end regions of the core and a frame of the motor/generator. To mitigate the losses, the stator core can be extended to a length substantially equivalent to or greater than a length of a magnetically active portion in the rotor. Alternatively, a conventional length stator core can be utilized with a shortened magnetically active portion to mitigate losses in the motor/generator. To mitigate the losses in the core caused by stator winding, the core can be extended to a length substantially equivalent or greater than a length of stator winding.

Abstract: Apparatus for fastening a winding assembly disposed at least partially in an air gap between a stator yoke and a rotor of an electric machine, includes a main body made of electrically insulating non-magnetic material. The main body includes a cylindrical base and a plurality of axial webs projecting radially outwards from the base in a direction of the stator yoke for at least partial engagement in complementary recesses in the stator yoke.

Abstract: An alternator includes a stator and a rotor disposed inside the stator and rotated by an engine of an automobile. The stator is composed of a cylindrical stator core and a stator winding held in the stator core. The stator winding extends from an axial end of the stator core, forming a circular coil end along an axial circumference of the stator core. Lead wires led out from phase-windings in the stator winding are held on and along the circular coil end and bonded thereto with adhesive. A depressed ditch is formed on the coil end, and the lead wires are disposed in the depressed ditch and firmly held therein to prevent movement of the lead wires relative to the coil end.

Abstract: An assembly for mechanically clamping a laminated steel stator core including laminated steel core-end magnetic flux shunts in a dynamoelectric machine is provided. The flux shunt at each end of the stator core includes first and second surfaces for receiving the clamping assembly. The first and second surfaces may be arranged to define a step. The clamping assembly includes an inner support ring configured to engage an entire 360° circumference of the first receiving surface of the flux shunt. The clamping assembly further includes an outer support ring configured to engage an entire 360° circumference of the second receiving surface of the flux shunt. The respective mechanical engagement provided by the inner and outer rings relative to the flux shunt is circumferentially continuous.

Abstract: A new improved system and method for end turn retention for wires on a generator rotor for use in high speed applications such as in aircraft applications. The rotor includes a shaft, spokes, supports, and wire winding coils, and at least one cap device. The spokes extend radially outwardly from the shaft, and each support is positioned on an associated spoke. Each coil wraps around an associated support and spoke. Each cap device is coupled to an end of its associated spoke to prevent the windings from moving radially outwardly while the rotor spins. Each support is coupled to an associated cap device, and includes at its radially inward edge a flange protruding away from the respective spoke. Because of the flange and the cap device, slack of the wire coil between the flange and the associated cap is taken up.

Abstract: To improve winding speed and productivity of a rotating machine by providing curved edges on corner portions of tongues of an insulation cap body. In an insulation cap structure for the rotating machine, corner portions of tongues of an insulation cap body disposed in a stator core or a rotor core is formed so as to have curved edges, and a locus of a needle at the time of winding is close to a circle rather than a rectangle of prior art, whereby winding speed can be increased.

Abstract: The invention relates to a device (12) for tensioning a winding (9) of a stator (1), in particular a generator stator (1) of a power plant. The winding (9) includes a winding head (10). Several winding supports (13) are arranged at the front side (4) of the core (2). Each winding support (13) abuts against the front side (4) of the core (2) and via a pressure spring element (19) against the funnel-shaped outer side (14) of the winding head (10). The winding supports (13) are fixed at the winding head (10) in the circumferential direction and in the surface line direction of the winding head (10). The winding supports (13) are movable perpendicularly with respect to the outer side (14).

Abstract: An assembly for mechanically clamping a laminated steel stator core including laminated steel core-end magnetic flux shunts in a dynamoelectric machine is provided. The flux shunt at each end of the stator core includes first and second surfaces for receiving the clamping assembly. The first and second surfaces may be arranged to define a step. The clamping assembly includes an inner support ring configured to engage an entire 360° circumference of the first receiving surface of the flux shunt. The clamping assembly further includes an outer support ring configured to engage an entire 360° circumference of the second receiving surface of the flux shunt. The respective mechanical engagement provided by the inner and outer rings relative to the flux shunt is circumferentially continuous.

Abstract: A stator device which prevents the formation of varnish accumulations on jumper wires, thereby preventing jumper wire breakage due to temperature variations. A gap is created between the jumper wire and the stud located on the stator body. When varnish is applied to the stud and the jumper wires, excess varnish flows through the gap and pools underneath. Moreover, when there is a significant accumulation of varnish in the gap, the varnish will flow off from the edge of the stator body.

Abstract: An improved airgap armature for use in brushless rotary electrical machines is constructed with multiple phase windings comprised of wires that are wound onto and bonded to a supporting form constructed from nonmagnetic and electrically nonconductive material. The form has two ends, each with features for holding end turns of the multiple phase windings. The multiple phase windings have active lengths and end turns, with the active lengths being located on one side of the form and the end turns located on the opposite side of the form. The active lengths, which are located in the armature airgap of the electrical machine, lie flat against the form for minimal thickness, and the airgap armature can achieve maximum winding density. The form provides an easy method for winding as well as increased structural integrity in the final armature to enable it to transfer torque between the rotor and stationary housing.

Abstract: An on-vehicle AC generator that comprises a rotor; and a stator including a cylindrical stator iron core in which a plurality of slots extending in axial direction of a shaft are formed to be circumferentially aligned, and which is fitted to and supported in a case to contain the rotor therein, and a stator winding wound about the slot of the stator iron core, and which possesses a high rigidity to secure no deformation by force applied at the time of being fitted to the case. An insulating resin having adhesive properties is applied to an entire surface of the coil end portions. A corner portion formed by outer circumferential surface of the bottom of the coil end portions and an end face in axial direction of the stator iron core is also filled with the adhesive insulating resin.

Abstract: A varnish is applied to crossover portions of coil ends of a stator winding such that a space factor of conductor wires and the varnish relative to a cross-sectional area of the crossover portions in a cross section of the crossover portions relative to a plane including an axial center of a stator core is seventy percent (70%) or more, and a ratio occupied by exposed portions of the conductor wires relative to an outer circumference of the crossover portions in the cross section of the crossover portions is fifty percent (50%) or more.

Abstract: An insulating paper piece for electric motors, capable of improving both electrical insulation between a coil and a stator core and electrical insulation between ends of coils of different phases without adversely affecting ease of coil insertion or the space taken up for the coil. A single insulating paper piece for electric motors contains at least two slot cell portions arranged in two slots of the stator core in which portions of one single pole coil are to be inserted, with two phase insulation portions arranged to connect respective ends of the two slot cell portions to form loops and disposed to face directly against coil ends of the single pole coil. The phase insulation portions comprise overlapping widthwise portions extended from both ends so that when a plurality of the insulating paper pieces for electric motors are mounted on the stator core, the respective overlapping portions of the adjacent insulating paper pieces overlap one another.

Abstract: An electromechanical linear actuator that contains an electric servo motor mounted within a compact housing. A thermally conductive path of travel is provided to efficiently transfer heat out of the housing into the surrounding ambient. A further mechanism is provided for holding the stator windings of the motor in undisturbed contact with the inner wall of the housing when the motor is subjected to thermal stress. The motor is arranged to linearly position a push rod through means of a ball screw unit. The ball screw nut and the push rod ride on bearings within guideways to insure that the push rod tracks along a linear path of travel.

Abstract: Each of a plurality of unit windings 41 is formed by being divided into a first winding section 42 having opened end portions and a second winding section 43, and the first winding section 42 is shaped in such a manner that a step in radial direction of a stator core 2 is formed between opposing side sections 46 and 47 and the opened end sections are bent in the crossing over direction of the winding so that open ends 443 and 444 of the opened end sections 44 oppose each other in the radial direction of the stator core 2, then the open ends 443 and 444 are connected by winding conductor pieces 431 and 432 of the second winding section to complete the unit winding 41, thereby, end sections of a stator winding are shortened and a small size dynamo electric machine is realized.

Abstract: A generator gas shield includes an annular ring body having an outer radially extending flange terminating at a first free end of a first diameter; a curved inlet portion; a substantially axial portion surrounding a center opening, and a curved outlet portion terminating at a second free end of a second diameter smaller than the first diameter.

Abstract: A stator winding is constituted by first and second three-phase alternating-current windings. An output-wire lead wire of winding phase portions led out of Address 6 of a slot is bent so as to extend axially outward at a coil-end apex portion, and a neutral-point connection lead wire of the winding phase portions led out of Address 5 of the slots is bent so as to extend axially outward at a coil-end apex portion. The bent portions of the output-wire lead wires and the neutral-point connection lead wires extending axially outward are gathered together and a tube is mounted thereto.

Abstract: A stator core assembly having an annular core defining an outside diameter, an inside diameter, and a plurality of radially projecting winding slots. A first electrical conductor and a second continuous electrical conductor are inserted within the winding slots circumferentially around the stator core. The conductors form a plurality of layers, each layer being defined as one substantially complete circumferential pass of the conductors around the stator core. Each of the conductors include a plurality of straight portions that lay within the winding slots, and a plurality of end loop portions that extend circumferentially to connect two of the straight portions. The length of the straight portions and end loop portions vary between the layers based upon the radial location of the particular layer within the stator core and a pre-determined axial height of the end loop portions.

Abstract: A brazed joint between an armature bar strand package and an end fitting is provided where a plurality of solid strands and a plurality of hollow strands are arranged in an array. The plurality of hollow strands have free ends that extend axially beyond corresponding free ends of the solid strands. A cavity in the end fitting is accessed by an opening, and the free ends of the plurality of hollow and the corresponding free ends of the solid strands extend through the opening into the cavity. A braze alloy joins the free ends of the plurality of hollow strands and the corresponding free ends of the plurality of solid strands to each other and to interior surfaces of the end fitting, wherein the braze alloy does not extend substantially beyond the free ends of the solid strands. A related method of forming the brazed joint is also disclosed.

Abstract: A dynamoelectric machine 20 includes a rotor 24 and a stator 26 surrounding the rotor. The stator 26 includes a plurality of windings arranged in a main portion 28 adjacent the rotor 24 and terminating in a plurality of inner and outer end windings 32, 34 extending outwardly from the main portion. An end winding support assembly 22 includes at least one support ring 36 for the plurality of end windings 32 and a respective adjustable bias member 38 between the at least one support ring and each adjacent end winding to provide an adjustable separation bias between the at least one support ring and each adjacent end winding.

Abstract: In order to provide a rotating electric machine which reduces vibration, noise and temperature rise and eases assembling work thereof through an improvement of a frame structure and a securing method between a stator iron core and the frame. In a rotating electric machine comprising a stator iron core 6 having a stator winding, a frame 1 having intermediate plates 2 for securing the stator iron core 6 to the frame 1, a rotor iron core 5 having a rotor winding, the intermediate plates (brackets) 2 which rotatably support the rotor at both sides in the frame axial direction under the condition of accommodating the stator iron core 6 and the rotor iron core 5 in the frame 1, cooling fans 4 for ventilation through rotation together with a rotor shaft 3, and a shaft portion extending from the brackets for directly coupling to a load, wherein, the securing between the frame 1 and the stator iron core 6 is performed by a welding structure at a welding portion 9.

Abstract: A flexible quadrature coil circuit is provided for use in an electronically commutated dynamoelectric machine for sensing the angular rotational position of a rotor relative to a stator. The stator has a plurality of stator teeth, with each tooth having an inwardly facing arcuate surface with at least one elongated rib and a channel disposed along a vertical axis of the tooth. The flexible circuit includes a flexible electrically nonconductive substrate with at least one slot formed in the substrate. The slot is configured to receive the corresponding rib so as to releasably secure the substrate to the arcuate surface of the stator tooth. At least one continuous electrical conductor is embedded in the substrate in a serpentine manner so that the continuous conductor forms a plurality of spaced apart conductor portions disposed between selected slots.

Abstract: An armature and method of winding the armature that improves coil density by winding adjacent poles so that the resulting windings have outer surfaces that taper in opposite directions that extend over a bisecting axially extending plane between the pole teeth at opposite ends thereof. The poles having the greatest radial extent relative to the pole axis at their base ends that are wound first.

Abstract: An engine includes an engine body and a generator. The engine body has a stator bracket mounted to the cylinder block. The generator incorporates a rotor flywheel and an armature assembly consisting of armature legs. Various metal plates with high magnetic permeability make up the armature legs and are securely fastened in a radial manner to the similar plate made of aluminum. The stacked armature legs surround the crankshaft and are mounted to the stator bracket. The preferred heat conduction path travels from the armature legs through the aluminum plate on onto the stator bracket in order to improve the heat dissipation of the generator.

Abstract: An electric motor capable of ensuring insulation of proximal portions of coil edges of a stator projecting from end of a stator core, and a method of insulating the proximal portions of the coil edges of the stator. The insulation sheet has a folding portion for folding one or more coils of the same phase and two insertion portions extending from the folding portion so that distal ends are positioned away from a centerline of the folding portion. One or more coils of the same phase are folded by the folding portion and the two inserting portions are inserted into the slot or slots from which the one or more coils project. The inserting portions are drawn from inside of the stator core so that the folding portion spreads to fold the proximal portions of the coils. The inserting portions are securely held between the wall of the slots and the coils to prevent the insulation sheet from displacement, inclination and slip off to securely insulate the coils of different phases.

Abstract: A method and apparatus for dissipating heat from electric motors. Small electric motors often operate at undesirably high temperatures and are often mounted to gear cases. To reduce the temperature a thermally conductive gap filling material is compressed between the winding heads of the stator and the mating surface of motor and gear case. The gear case functions as a heat sink for the stator windings. Additional heat sinks may be mounted on the motor housing using additional thermally conductive gap filling material compressed between the other winding heads and the cover.

Abstract: A method for improving the efficiency of electromagnetic devices having a ferromagnetic core containing electrical windings. The ferromagnetic core is variously configured to include intra-turn ferromagnetic protrusions which are configured to nestle between junctions of the windings, such as in the bends, to increase the amount of ferromagnetic material retained proximal the windings. The increased amount of ferromagnetic material increases electromagnetic efficiency, and reduces the probability that the wiring will be nicked on the edges of the electromagnetic core. By way of example, the intra-turn ferromagnetic projections may be formed within an integrated electromagnetic core, as unitary core extensions, or as singular protrusions attached to the electromagnetic core.

Abstract: A rotating electrical machine having cooperating rotor and stator, one of which forms a plurality of pole teeth around which individual coils are wound. The coils are connected in a number depending upon the phase and number of poles and the connected coils of each phase are spaced from each other. Crossover wires connect these coil windings of each phase and the crossover wires are affixed by bonding to outstanding tabs that are formed on the outermost laminations of the assembly. This reduces hand labor and insures that the crossover wires will not interfere with other components of the machine or associated driving or driven structures.

Abstract: A dynamoelectric machine 20 includes a rotor 24 and a stator 26 surrounding the rotor. The stator 26 includes a plurality of windings arranged in a main portion 28 adjacent the rotor 24 and terminating in a plurality of inner and outer end windings 32, 34 extending outwardly from the main portion. An end winding support assembly 22 includes at least one support ring 36 for the plurality of end windings 32 and a respective adjustable bias member 38 between the at least one support ring and each adjacent end winding to provide an adjustable separation bias between the at least one support ring and each adjacent end winding.

Abstract: The invention relates to a device (12) for tensioning a winding (9) of a stator (1), in particular a generator stator (1) of a power plant. The winding (9) includes a winding head (10). Several winding supports (13) are arranged at the front side (4) of the core (2). Each winding support (13) abuts against the front side (4) of the core (2) and via a pressure spring element (19) against the funnel-shaped outer side (14) of the winding head (10). The winding supports (13) are fixed at the winding head (10) in the circumferential direction and in the surface line direction of the winding head (10). The winding supports (13) are movable perpendicularly with respect to the outer side (14).

Abstract: An alternator includes a stator and a rotor disposed inside the stator and rotated by an engine of an automobile. The stator is composed of a cylindrical stator core and a stator winding held in the stator core. The stator winding extends from an axial end of the stator core, forming a circular coil end along an axial circumference of the stator core. Lead wires led out from phase-windings in the stator winding are held on and along the circular coil end and bonded thereto with adhesive. A depressed ditch is formed on the coil end, and the lead wires are disposed in the depressed ditch and firmly held therein to prevent movement of the lead wires relative to the coil end.

Abstract: Circumferentially-smooth heat-conducting surfaces are formed on coil ends by rolling a coil end group of a stator winding. A distribution channel for distributing cooling water is disposed in a bracket. A heat-conducting filler is filled between the coil end group and the bracket.

Abstract: In a turbo generator with a rotor with direct gas cooling, which rotor is provided with a rotor winding arranged around a central rotor body, said rotor winding being on the front sides covered by one each annular cap plate, and in which rotor cold cooling gas for cooling the rotor flows into ring gap segments between the cap plate and the rotor body, whereby the ring gap segments are bordered, when seen in circumferential direction, on the sides in each case by the section of an end spacer plate provided between the cap plate and the rotor winding, whereby this section is projecting into the ring gap, improved cooling is achieved in that separations of the cooling gas stream on flowing into the ring gap segments are avoided by designing the sections of the end spacer plates, whereby these sections adjoin the ring gap, in a manner that is advantageous with respect to the flow.

Abstract: An assembly for cooling an electric motor, the assembly comprising a housing, a stator, a rotor, a winding, an end-winding integrally formed with the winding, and a jet impingement device operable for exposing the end-winding to a temperature controlled stream of fluid. A method for transferring heat between a stream of impinging fluid and the surface of an electric motor end-winding. An electric motor comprising a jet impingement cooling assembly.

Abstract: A vehicle alternator comprising a case, a stator winding, and an electrically-insulating element interposed between the case and the winding, the insulating element being a solid body mounted on one of the case and the winding. The insulating element has at least one duct extending through an orifice in the case.

Abstract: In a rotating electrical machine having a permanent-magnet rotor, the tubular, highly thermally conductive supporting body of the stator forms a thermal bridge to a cooling means. In order to allow the end windings of the stator windings to be cooled effectively as well, the end windings also each have an associated thermal bridge, which completely fills the space between the end windings and the supporting body of the stator. This thermal bridge is of solid construction having a solid ring, which is connected to the supporting body of the stator with a force fit, and a cast-resin body which is cast into this solid ring. The cast-resin body has a thermal conductivity of more than 1.6 W/mK and, for this purpose, contains a powdery, highly thermally conductive filler making up a proportion of 50 to 90% by weight, preferably an aluminum nitride coated with silicon dioxide.

Abstract: A new and improved header design for a fluid tight, current carrying header that reduces direct contact between the liquid coolant and brazed joints. More specifically, the present invention provides for a header with hollow strands for carrying a coolant, and solid strands, the hollow strands being longer than the solid strands, the hollow strands grouped together at a first end of the header to form a hollow strand package, and the hollow strands and the solid strands grouped together at a second end of the header to form a mixed strand package. The hollow strand package may be fused to a liner of the header. This construction reduces water contact with the current carrying braze and groups the fluid carrying hollow strands in a separate hollow strand package where a reliable, corrosion-resistant metal fusing process can be applied to provide a reliable leak proof seal.

Abstract: A rotary variable differential transformer apparatus for determining angular position of a rotor includes a stator support structure, a first pair of magnetically permeable stator elements and a second pair of magnetically permeable stator elements. The first and second pairs of stator elements are connected via first and second connecting members, respectively and are substantially supported by the stator support structure. Circuitry for generating a position indicator signal, including an array of coils is coupled to the first and second pairs of stator elements. A rotor is mounted within the stator support structure and substantially surrounded by the first and second pairs of stator elements. The rotor has a magnetic flux conducting element mounted thereon, which couples each of the first and second pairs of magnetically permeable stator elements in a manner which varies in proportion to the angular position of the rotor.

Abstract: In a stator according to the prior art, noise and damage occur because an undesirable play between a winding and a pole cog causes vibrations.

Abstract: A torque motor configuration that minimizes off-axis magnetic forces emanating from adjacent energized coils acting on a magnet. The motor includes a stator comprising a sleeve with conductive coils disposed thereon, and the stator further defining a rotor opening, and a rotor disposed in the rotor opening comprising a magnet disposed on a shaft with the sleeve being shorter than the magnet and the coils including turn around zones beyond respective ends of the sleeve. The motor may be incorporated into an optical scanning system including optical elements for detecting light from a light source.

Abstract: A rotor of a motor has a cylindrical magnet coaxially disposed with a shaft. The shaft and the magnet are bonded with thermosetting resin formed by injection molding. Since the molding shrinkage of the thermosetting resin is so small that a high preciseness is achieved in the motor structure. This precision structure can reduce vibration due to unbalance of a rotor. Also, an annealing process, in which a motor is left at a temperature higher than the limit temperature for operating the motor, can be eliminated. As a result, the efficiency of producing the motor can be improved.

Abstract: An alternator includes a rotor including claw-shaped magnetic poles fitted onto a rotating shaft, and a cooling means disposed on an end surface of the claw-shaped magnetic poles, and a stator including a stator core disposed facing the rotor, the stator core having a plurality of slots, and a stator winding installed in the stator core, the stator being cooled by the cooling means, and a bracket for supporting the rotor and the stator, a passage for an air flow generated by the cooling means being disposed inside the bracket, the stator winding including coil ends extending outwards from end surfaces of the stator core, and a shielding material being disposed so as to cover at least an inner circumferential surface of the coil ends.

Abstract: An electrically-insulating resin portion is formed by applying a resin so as to cover apex portions of coil ends forming a coil end group, that is, weld portions and surfaces of portions where an insulation coating has been removed from free ends of coil segments which constitute joint portions between the free ends. Spaces between radially-adjacent joint portions may be filled by the electrically-insulating resin portion. In addition, air passage spaces may be ensured between circumferentially-adjacent joint portions.