Abstract: An air gap varying motor includes a base, a rotation body, a motor rotor, a motor stator which is fixed in the base, and has an inner surface for contacting and supporting the motor rotor to enable the motor rotor to rotate about a predetermined axis, and which is disposed to have a distance spaced from said motor rotor An engagement and adjustment member connects the rotation body and the motor rotor and to adjust a distance between the motor rotor and the motor stator.

Abstract: The stator winding of an electrical machine comprises conductor elements which are spaced apart from one another, are electrically insulated from one another and are surrounded over their entire length by common main insulation. The cavities, which are caused by the arrangement on both bar narrow sides of the conductor elements and the main insulation, are filled with an electrically semiconductive compound which, for its part, is covered by an electrically semiconductive strip. In order to provide a smooth bar surface, the electrically semiconductive strip is composed of a fiber-reinforced plastic, which has incisions on alternate sides of the narrow sides of the conductor bar oriented transversely with respect to the bar's longitudinal direction; these incisions are deeper than half the strip width and have a cut width which is on the order of magnitude of the strip thickness.

Abstract: An upper coil bar and lower coil bar are disposed in slots of an armature core. The upper coil bars have upper coil-end sections which extend radially from the outer periphery of the armature core and together from a commutator surface with which a brush member is in contact. The upper coil-end sections and coil-end sections of the lower coil bars are retained by a fixing cap fixed between a shaft of the rotary electric machine and the upper coil-end sections, and also by a spacer disposed between the upper coil-end sections and the lower coil-end sections so that the commutator surface can be maintained smooth even under conditions of thermal expansion or high-speed operation.

Abstract: An induction machine having ferromagnetic conducting material in the rotor is disclosed. The machine may be used as a motor, an alternator, a generator, or an alternator/starter. The machine includes a first stator and a second stator in a symmetrical mirrored relationship to the first stator such that a gap is defined intermediate the first and second stator. A disk-shaped rotor is disposed in the gap. The rotor is substantially comprised of ferromagnetic material electrically conducting in the radial direction and may include copper bars or rings embedded within the rotor.

Abstract: The conductor section is for a stator frame of a polyphase dynamoelectric machine. The stator frame is provided with a series of elongated parallel slots for receiving respectively conductor sections. The conductor section comprises two parallel conductor sides of substantially rectangular cross section adapted to fit respectively into two corresponding parallel slots of the stator frame, the two sides defining a plane; and at least one conductor head of substantially rectangular cross section, connecting two adjacent ends of the parallel sides. The head shows a substantially U-shaped body when seen from a top view perpendicular to the plane, and a waved-shape body when seen from a front view contained in the plane. The head having top and bottom surfaces facing only one side of the plane from one end of the head to the other end thereof. Methods for mounting conductor sections of stator winding onto a circular shaped stator frame are also described.

Abstract: An electric rotating machine which withstands mechanical and thermal loads applied thereto is provided. Coil arms and coil trunks are provided in roughly parallel orientation to the end faces of an armature core only through insulating rings and insulating spacers. Metal brush is disposed on coil arms constituting a commutator, whereby the overall length of the armature can be remarkably shortened. The coil arms are strongly pressed against and fixed to the side of armature core by a collar, so that the resistance to the centrifugal force can be remarkably improved. A cylindrical ring is circumferentially fitted on the upper coil trunks to prevent radially outward movement of the coil arms due to the centrifugal force. The coil arms disposed in a non-commutator side are made radially shorter than those disposed in the commutator side. Thus, electric resistance of an armature coil is reduced and radial movement caused by the centrifugal force is reduced.

Abstract: A plurality of insulator-coated coils wound in slots of a magnetic core in multiple layers have end portions including at least contact portions without insulator coatings and connected to risers of a commutator, and adjacent portions next to the contact portions but out of the risers. A stepped portion is formed in at least one of the adjacent portion of an upper coil and the adjacent portion of a lower coil of the insulator-coated coils wound in multiple layers at a location where the upper coil and the lower coil face each other in crossing relation. A sufficient gap distance between the upper and lower coils is ensured at the location where the coils cross each other, and the productivity of revolving armatures is improved.

Abstract: An electroconductive material has at least one portion in which the electrical resistance varies continuously along a gradient. Accordingly, since the material is not formed by directly bonding different elements, it does not have a weak joint portion. Further, since other material characteristics besides electrical resistance also vary along a gradient, for instance, when the material is used at a high or low temperature, a large thermal stress does not generate at an interface between different elements of the material due to a difference of thermal expansion coefficients of such elements. A motor uses the above electroconductive material as a conductor provided in a plural slots. Consequently, starting characteristics of the motor are improved due to the skin effect, and internal stress of the motor due to the thermal expansion of the conductor is decreased. Moreover, the reliability of the motor is improved.

Abstract: An arrangement for sealing the slots, which are filled with conductor bars or coils, in the laminated stator core of an electrical machine by use of slot sealing elements includes an upper prismatic body, on whose underneath a surface runs in an inclined manner, and a lower prismatic body. The upper surface, facing the upper body, runs inclined in the opposite direction to the gradient of the lower surface of the upper body, and actual wedging is effected by relative displacement of the two prismatic bodies with respect to one another.In order to be able to utilize the elasticity of the upper body in the transverse direction in an optimum manner, the force is introduced from the conductor bar or coil to the upper prismatic body, essentially only in its central section, over its entire length. As a consequence, relatively large spring movements in the radial direction are available which, for their part, can compensate better for a seating phenomena in the winding structure.

Abstract: A central conductor portion of a coil is formed with a potbelly-shaped cross-sectional form and a flat-shaped face of an insulated coating film of the potbelly-shaped cross-sectional form coil is made thinner than an arc-shaped face of the insulated coating film of the potbelly-shaped cross-sectional form coil. An insulated coating wire having a circular-shaped cross-sectional form is formed to a coil having a potbelly-shaped cross-sectional form by rolling process at a normal temperature. A dead space in a slot is lessened and the magnetic resistance of a magnetic core is decreased, thereby a small size and a high output electric motor can be obtained. A method of forming a rotary armature coil having a high space factor in the slot can be attained.

Abstract: Power is provided to the stator windings of an AC machine which includes a component at the fundamental drive frequency for the machine and a superimposed signal component which is at a substantially higher frequency than the drive power. The rotor has saliencies which result in a change in impedance as seen at the stator windings to the high frequency excitation signal as a periodic function of rotor rotational position. Such saliencies are inherent in some permanent magnet synchronous and all synchronous reluctance machines, and may be provided by appropriate modification of the rotor of induction machines. The stator response at the signal frequency is then detected to provide a correlation between the response at the signal frequency and the rotor position.

Abstract: The provision of an electric rotating machine which can reduce the mechanical and thermal loads applied thereto. Coil arms and coil trunks are provided in roughly parallel orientation to the end faces of an armature core only through insulating rings and insulating spacers. Metal brush is disposed on coil arms, whereby the overall length of the armature can be remarkably shortened. In addition, a commutator, conventionally necessary, can be eliminated, whereby the length of the production process for the armature can be reduced. Moreover, in an arrangement where projections of the upper coil arm are fit in holes of the insulating spacer, as the displacement of the upper coil arm towards the outer periphery is regulated, the length of the axial protrusions of the upper coil arm from the end face of the armature core can be minimized.

Abstract: A squirrel-cage rotor (10) includes a laminated core (14) fixed to a rotor shaft (12), a plurality of secondary conductors (18) arranged respectively in a plurality of through holes (16) formed through the laminated core (14), a pair of end rings (20) connected to the secondary conductors (18) at axial ends of the laminated core (14), and a pair of reinforcing members (22, 23) respectively covering the end rings (20). The secondary conductors (18) and the end rings (20) are integrally formed through a casting process, and are connected with the laminated core (14) and the reinforcing members (22, 23).

Abstract: Conformable distance blocks assemblies (24, 26) are provided for spacing adjacent end windings (20, 22) in a dynamoelectric machine. Each block assembly includes a pair of relatively hard blocks (28, 38) straddling a deformable spacer (32). The blocks and spacer are wrapped with an electrically insulating tape (34, 48) having an adhesive along an interior face for maintaining the blocks and spacer in assembled condition with a tab (36, 50) on the end of the tape. Generally rectilinear blocks (28) are employed for axial distance block assemblies, while the circumferential block assembly is comprised of tapered blocks (38) forming a wedge assembly. In installation, the assemblies are disposed between adjacent end windings, resiliently deforming the spacer, the tab being adhesively secured to the outermost lamination of the end windings. The spacer is also impregnated with a resin such that, upon curing, a rigid distance block assembly is provided to maintain adjacent end windings spaced from one another.

Abstract: A motor coil structure has a lamination of in-slot coils incorporated into slots in a stator core and inter-slot connecting wires individually connecting to the end faces of the in-slot coils. Each of the inter-slot connecting wires is in the form of a bar such that the in-slot coils received in two different slots spaced away from each other by slots equal in number to n-1 (where n is the number of phases). Since the space factor depends on the lamination of in-slot coils in the slot, any clearance in the slot can be eliminated to improve the space factor compared with a motor coil structure in which a coil is formed by binding and winding a plurality of wires.

Abstract: An electrical stator of an electromagnetic pump includes first and second spaced apart coils each having input and output terminals for carrying electrical current. An elongate electrical connector extends between the first and second coils and has first and second opposite ends. The connector ends include respective slots receiving therein respective ones of the coil terminals to define respective first and second joints. Each of the joints includes a braze filler fixedly joining the connector ends to the respective coil terminals for carrying electrical current therethrough.

Abstract: The conductor bars of stator windings of rotating electric machines are usually multiply wound around with two-layer mica strips as major insulation and then impregnated with synthetic resin. It is proposed to use as first layer (L1) a mica strip which is provided on both sides with a textile carrier (24, 25). The further layers (L2, L3, L4, . . .) are then wound with a mica strip (27) provided with a textile carrier (28) only on one side. A major insulation constructed in this way is very homogeneous. The textile carrier (24), preferably consisting of glass fabric, which bears directly on the conductor surface, optimizes the impregnation and produces an effective bond between the insulation and conductor.

Abstract: The dynamoelectric machine has endwindings 24 including a plurality of superposed conductor bars 22 and adjacent end turns 20. Rabbets 32 are formed along the undersides of the adjoining conductor bars and end turns to receive gussets 30 for reinforcing the joints therebetween. One or more of the conductor bars and end turns have cooling passages 36, 38 with ports 40, 42 opening to one side of the joint at locations short of the joint. A cooling block 48 is disposed on one side of the joint extending between the superposed conductor bars and superposed adjacent end turns and spaced from the joint to define a chamber 60 in communication through the ports with the passages for passing cooling gas therethrough in heat exchange relation to the joint assembly.

Abstract: The dynamoelectric machine has endwindings including a plurality of superposed conductor bars 22 and adjacent end turns 20. Rabbets 32 are formed along the undersides of the adjoining conductor bars and end turns to receive portions 34 of gussets 30, remaining portions 35 of the gussets projecting to one side of the joint. The conductor bars and end turns have grooves 38, 36 forming cooling passages with ports 42, 40 opening to one side of the joint short of the joint. The gusset 30 has a barrier 44 spaced from the joint and forms with the ports a cooling channel 46 between the ports for transporting cooling gas between the cooling gas channels of the conductor bars and end turns.

Abstract: A system for supporting conductors in a dynamoelectric machine having a stator assembly with a plurality of stationary armature elements spaced about a circumference positioned radially about a central longitudinal axis, where each armature element includes an armature winding on a base portion and a leg extending from each of the base portions in a radially inward direction, includes a spacer for supporting one or more electrical conductors and for insulating the one or more conductors for an armature element. The spacer is mountable on the armature element and may comprise one or more grooves for supporting one or more interconnecting bars which are capable of connecting the armature windings of two or more armature elements. The spacers may be fastened to the stator assembly and allow the stator assembly to be equipped with conductors which may be oriented in a pattern which minimizes conductor length and minimizes energy losses.

Abstract: An armature coil assembly for magnet-type rotary electric machines such as alternators or motors, which comprises flat conductor pieces or segments with large-area sides thereof arranged parallel to the direction of the magnetic fluxes of a permanent magnet, and a ferromagnetic member inserted between the conductor pieces. The ferromagnetic member inserted provides a magnetic anisotropy in the armature coil along the axis of coil rotation, thus the flow of magnetic fluxes from the magnet through the armature coil to the machine core is facilitated thereby to reduce leakage magnetic fluxes. A stator coil assembly is also made up by using like coil conductor segments.

Abstract: Radial loop coils are wound in radial planes partly in the conventional slots of the stator and/or rotor core at right angles to the planes of the conventional drum coils. No conventional drum coils are wound. A cylindrical body of nonmagnetic material is fixedly interposed between the rotor core and the shaft and/or between the stator core and the yoke so that the flux of the stator and the rotor core flows in opposite side portions of the stator and rotor core, not through the shaft or the yoke, to generate e.m.f. in the radial loop coils by the transformer action. The flux which is produced by the transformer m.m.f. of the radial loop coils is constrained to flow into the air gap by virtue of the presence of the cylindrical body of nonmagnetic material where it acts to eliminate changes in the main magnetic field flux density distribution in the air gap.

Abstract: A stator winding assembly for a dual purpose alternator starter for an automotive vehicle designed to be positioned between the engine and transmission. The stationary ironless stator assembly has flat copper windings embedded in an insulation matrix. These windings undulate from the perimeter of the disc towards the interior of the disc as each winding forms a single pass around the ring shaped disc. Each winding has a plurality of outwardly directed tabs spaced apart. These tabs are connected to adjacent winding tabs so as to reduce overall winding resistance.

Abstract: A winding arrangement for a rotor pole in a synchronous machine having edgewise wound conductors forming a coil for the pole, the pole having at each end an end plate to provide curved corner portions for the winding. The conductor has a slot extending through it with the walls of the slot parallel to the edges of the conductor. The slot is provided in the conductor at the corner region where the edgewise wound conductor is to bend around the corner. The slot reduces the upset which occurs at the inner edge of the conductor where it bends, and it also permits the conductor to follow the curved corner portion more closely.

Abstract: An axial vent channel (30) for installation in a generator rotor winding slot, the channel (30) being in the form of an elongate, closed tube of polygonal cross section enclosing a longitudinal passage (32), the tube being formed to have a closed bottom wall and an opposed, substantially closed, top wall provided with a plurality of radial vent slits (36) spaced apart along the longitudinal passage (32), the channel (30) being configured to be installed in the rotor winding slot with the passage (32) extending parallel to the axis of the rotor, the bottom wall facing toward the axis of the rotor and the top wall facing away from the axis of the rotor.

Abstract: This invention relates to a motor and a motor apparatus and is so constructed that end rings and bars composing a squirrel cage rotor of the motor are formed in a hollow or grooved shape and superconductive materials are filled within said end rings and bars to form looped circuits, which are symmetrical relative to a center line of a field, of a number equal to a number of poles, by the superconductive materials filled in each two bars and both end rings, so that the motor exhibits starting characteristics similar to those in an induction motor using a squirrel cage rotor composed of usual conductors by starting in an atmosphere of room temperature, and the operational characteristics as a very highly efficient synchronous motor by cooling the rotor to a critical temperature or less of the superconductive material after starting a permanent direct current flows through field windings composed of the superconductive materials.

Abstract: An end plate for a squirrel cage amortisseur winding is made from four angular segments, each of the segments being of the same shape and size, the segments having portions thereof cut out along the annular inner surface and the outer edges to accommodate close nesting of the angular segments across both the width and length of a sheet of raw material to minimize waste as they are cut therefrom.

Abstract: An induction motor system, including a housing, a stator supported by the housing and having a plurality of stator winding conductors positioned about an axis of rotation, and a rotor mounted in the housing for rotation about the axis of rotation, is provided with an integral electronic controller for dynamically and programmably controlling the currents supplied to individual conductors of the stator winding. The stator winding conductors are connected in common at one end and are individually connected to a switching circuit at the other end. The switching circuit supplies positive or negative current pulses through selected conductors. Pulse width modulated signals generated by the controller simulate sine wave energizing signals to provide various operating configurations. By programmed variation of the fundamental frequency, pole configuration, phasing and power level, the rotating speed, starting, acceleration, torque, reversing, dynamic braking and efficiency are dynamically controlled.

Abstract: A multi-layer armature winding for large turbine generator is wound with individual diamond coils around to the point where the sides of initially wound diamond coils lying in upper armature slot positions interfer with the placement in lower slot positions of the coil side of additional diamond coils to complete the winding. To avoid having to "raise the jump" the winding is completed using bar coils, individual bars of which having been laid in those lower slot positions prior to the placement of any diamond coils. The remaining bars are laid in the vacent upper slot positions and then electrically joined with the initially laid bars to complete the individual bar coils.

Abstract: A multi-layer armature winding for large turbine generator is wound with individual diamond coils around to the point where the sides of initially wound diamond coils lying in upper armature slot positions interfer with the placement in lower slot positions of the coil side of additional diamond coils to complete the winding. To avoid having to "raise the jump" the winding is completed using bar coils, individual bars of which having been laid in those lower slot positions prior to the placement of any diamond coils. The remaining bars are laid in the vacant upper slot positions and then electrically joined with the initially laid bars to complete the individual bar coils.

Abstract: A rotor of an electrical machine having directly cooled rotor winding, including winding conductors forming a conductor bundle, located one above the other in respective grooves and fastened therein by respective groove wedges, the winding conductors each having at least two adjacent half cooling ducts extending in the longitudinal direction of the conductors. Provided in a central section of the rotor assembly are two gas outlets offset relative to one another in a peripheral direction of the rotor and in which the cooling ducts are interrupted by separating means. At each interruption point, the respective half cooling duct is in connection with a respective radially extending duct, which ends at the surface of the rotor. In order to avoid increases in temperature in the region of the gas outlet, the gas outlets of a conductor bundle are offset retative to one another in the longitudinal direction of the conductors. The radial ducts emerge into holes penetrating the groove wedges approximately radially.

Abstract: Series loops of the stator of a large steam turbine-generator are electrically insulated from each other by enclosing each of them in its own clamshell thermoplastic resin mold and filling the mold with an electrically-insulating thermosetting resin material which bonds to the metal of the series loops and the stator bars and bonds also to the ground insulation covering on the stator bars and to the mold and together with the mold provides in cured form an integral body which is resistant to vibrational and impact forces and to distortional forces incident to thermal cycling of the equipment in normal use.

Abstract: A multiple turn coil adapted to be inserted in a slot of a rotor in a dynamoelectric machine is formed by a bundle of individually insulated parallel bars of electroconductive material arranged close together and surrounded, in the vicinity of each slot section of the coil, by a pre-formed tube of substantially non-compressible, non-thermoplastic dielectric material (e.g., polyimide film), the wall of which is thin and flexible enough to bend in any plane and smooth enough to permit substantially unfettered longitudinal expansion and contraction of the insulated conductors inside the tube. Inside the coil a cross-shaped member of the same dielectric material enhances the turn-to-turn insulation.

Abstract: A ferromagnetic core disk armature has one armature winding in a single layer with one collector. The winding is formed by a plurality of interconnected first and second types of winding sections, each type being disposed on one different side of the core. The two types are identical except for a radially inwardly extending prolongation on one type which forms the one collector. The winding sections are interconnected only at the periphery of the core.

Abstract: A flat coil for use in a rotary electric machine has an annular row of generally radially extending and circumferentially spaced electrically conductive segments (1) on each annular end face of an electrically insulating base member (2). Each segment has a non-effective section disposed adjacent to the radially inner end of the segment and having a mean thickness greater than that of the remaining sections of the segment to improve the cooling ability of the coil. The segments are formed by punching a blank of thin copper sheet to form therein an annular row of radially extending and circumferentially spaced slits to thereby form an annular row of radially extending and circumferentially spaced segments. Before or after the blank is punched, the blank is subjected to forging, electrolytic plating, electrolyzing treatment or mechanical treatment so that the non-effective section of each segment has a thickness greater than that of the remaining sections.

Abstract: Disclosed is a winding for a high voltage electrical generator comprising a plurality of bundles of conducting member arranged whereby highest voltage is impressed on the innermost bundle and lowest voltage is impressed on the outmost bundles. The bundles of the winding are wrapped within sheets of electrical insulation with the cumulative insulation thickness being in approximate proportion to the voltage gradient across the bundles of the winding.

Abstract: An electrical connection system is provided for the salient poles of a hydrogenerator rotor. The system provides for identically wound salient poles to be connected in a manner that achieves opposite electromagnetic polarity of adjacent salient poles while eliminating the requirements of crossover connections during final assembly of the poles to the rotor or during field replacement of salient poles.

Abstract: Rotating electrical machine of the type comprising a stationary portion and a moving portion coaxial therewith, the stationary portion carrying a first and a second windings, while the moving portion has a third winding, characterized in that said third winding consists of a number of bar sets each of which comprises two interconnected bars, the said number of bar sets being either equal to the number of pole pairs of the stator winding having the largest pole pitch in the case of a one-phase rotor, or equal to three times said number of pole pairs in the case of a three-phase rotor.

Abstract: A method of preliminarily bending ends of windings in an armature assembly having at least two layers provides an armature assembly for a dynamoelectric machine that does not require a layer of insulation between terminal portions of conductive windings between the armature lamination assembly and the commutator. The preliminary operations may also include trimming of the free ends of the terminal portions of windings, so that a substantially, fully machined commutator assembly may be used, providing improved electrical contact during a resistance welding or brazing step for affixing the ends of the windings to respective commutator segments. The commutator segments may be manufactured without riser portions, resulting in a less costly assembly which is less susceptible to damage during handling during assembly.

Abstract: A band of fabric over the interface between the slot armor and the copper bar of a pole face winding is both resistant to migration of conductive contaminants under the edge of the slot armor and hospitable to the application and retention of an insulating paint layer over such interface. The band of fabric is preferably of woven glass fiber with a tenacious pressure sensitive adhesive on one side and with the other side bare. The adhesive is compatible with the material of the slot armor, sticks readily to the copper bar and to the bare surface of the woven glass fiber fabric band. The bare side of the fabric provides a good mechanical bond to the insulating paint layer and thereby encourages the establishment and retention of an unbroken paint layer over the interface. The combination provides a long electrical leakage current path between the copper bar and the iron of the pole.

Abstract: A star (wye) connected air gap polyphase armature having limited voltage differences between physically adjacent coil windings at the phase boundary for the different phase circuits. The unconnected lead of the coil or coils at the first edge of the phase belt region forms the neutral terminal for connection of the phase winding in a star or wye circuit comprised of other similarly formed phase windings, and the unconnected lead of the last coil or coils remaining at the middle of the phase belt region forms the line terminal for the multiple coil phase winding to thereby minimize voltage differences between turns of physically-adjacent phase windings at the phase boundaries.

Abstract: Conductor bar for electric machines operating at high voltage, including at least two subconductor packets being disposed side by side and being formed of mutually insulated subconductors, the subconductors being intertwined in such a manner that each subconductor occupies each possible physical position in at least one location within the conductor bar, an insulating sleeve, a semiconductor layer applied to the insulating sleeve, a further semiconductor layer disposed between the subconductor packets and the insulating sleeve, the conductor bar having a straight portion and narrow sides having a given width, a narrow-side subconductor bar crossing from one subconductor packet to another, the narrow-side subconductor bar being disposed at a given height filling a portion of the given width of the narrow side leaving a remaining width, hardenable cement layers being disposed substantially at the given height flanking the narrow-side conductor bar in vicinity of the crossing and filling the remaining width.

Abstract: A laminated winding for electric machines comprises a cylinder formed of a roll of conductive strip-like material isolate on one side and having a roll wall. The cylinder includes axial slots across the roll wall alternatively starting from the one roll end and from the other roll end and extending nearly up to the opposite roll end leaving a circumferential portion and so as to form a wave winding. The laminated winding further comprises electrical terminals for supplying an electrical current through the wave winding. Preferably, the axial roll portion between the slots and the circumferential roll portions are of equal width. A first one of the windings may be arranged as a rotor and a second one of the windings may be arranged as a stator of a rotating electric machine.

Abstract: A rotor for a large dynamoelectric machine possesses abrasion prevention material between certain of the laminations in the rotor winding. In particular, while the rotor windings may generally be wound in a series-connected fashion, the use of adjacent parallel winding conductors requires the use of an abrasion prevention material disposed between adjacently lying parallel-connected conductors. The use of this material eliminates copper galling and the undesirable formation of copper particles.

Abstract: An improved end winding support system for "P" bars is disclosed wherein each "P" bar extends axially from one end of a stator slot of the stator core of a dynamoelectric machine which has an integral excitation system. The support system includes means for affixing each of the "P" bars to stator bars at three different locations in the end winding region and especially in such a manner that the inner section close to the stator core includes a slip plane capable of accommodating relatively small differential thermal expansion displacements in the axial direction between the "P" bar and the stator bars.

Abstract: Disclosed is a dynamoelectric machine stator winding having a plurality of coil sides of varying lengths disposed in a plurality of slots located around the inner periphery of a tubular stator core. Top and bottom coil sides (radially inner and outer positions) of unequal length are placed within the slots and interconnected such that top coil sides are joined to bottom coil sides disposed in other slots when the top coil sides, as dictated by winding topology (for phase interspersed connector ring segments), are longer than the commonly slotted bottom coil sides. When the bottom coil side in a subject slot is longer than the commonly slotted top coil side, the top and bottom coil sides are lengthened and shortened, respectively, and the top and bottom coil sides in the subject slot are respectively joined to top and bottom coil sides on both axial ends of the stator.

Abstract: A superconducting field winding for the rotor of an electric machine having several winding sections, the conductors of which each have a predetermined permissible bending radius which is larger than the bending radius provided at the coil heads of the winding section, wherein two associated conductor sections of a winding section are always electrically connected at at least one coil head by means of a prefabricated yoke-like conductor element whereby conductors with relatively large conductor cross section need not be subjected to excessive tensile stresses at the coil heads thereby avoiding damage to their superconducting material.

Abstract: A multiphase stator winding for a dynamoelectric machine constituting a plurality of coil loops each of which have a plurality of coil sides of varying lengths that are embedded in stator core slots. Each coil loop has two straight coil sides embedded within the stator slots and an annular connector ring segment which connects the two straight coil sides in an end region of the stator. The connector ring segments are interspersed in the axial direction so that connector ring segments of identical phase are separated by connector ring segments of other phases.

Abstract: The polyphase stator winding of a dynamoelectric machine consists of a plurality of coils circumscribed about one another. Each coil has at least one end turn which includes two coil sides and a C-shaped connector ring that joins the coil sides together. The coil sides are straight conductors, or ones that are slightly bent on each end, and are embedded within the stator slots and extend into the end basket region of the machine where they are joined together by the C-shaped connector rings.

Abstract: A laminated coil which may be used as a winding in electrical machinery is formed by multiple layers of thin electrically conductive material, each having an insulating layer on one side and being shaped in a specialized pattern. The patterns each form a winding and are shaped such that current flow therethrough generates a magnetic pole at only three of four cross-sectional sides. The laminated coil is formed of layers of these patterns arranged to provide a magnetic pole at all four sides.