Abstract: In a cage rotor for an induction motor, a end ring (22) for connecting conductive rods (20) to one another is covered with a reinforcing member (24). The reinforcing member (24) is obtained by integrally forming a tube-like portion (26) having an inner diameter which is substantially equal to the diameter of a central through hole (14) of a laminated core (26), an annular end wall (28) extending radially outward from one end of the tube-like portion (26) in an axial direction, and an annular engagement wall (30) extending radially outward from the other end of the tube-like portion (26) in the axial direction.

Abstract: A rotor with permanent magnets for an electric motor, comprising a plurality of magnets (2, 20) disposed around the circumferential surface of a rotor core (1, 10) and equally spaced from each other, an external cover (40), affixing the magnets against the rotor core, each magnet (20) being seated onto the core (10) through corresponding supporting means (30, 50, 60), which are restrained from displacements relative to each said magnet (20) and which are positioned, according to alignments parallel to each other and to the rotor access, symmetrically in relation to a longitudinal plane of symmetry (X) of the magnet (20) and spaced from each other by a distance smaller than the distance between the end lateral edges (21) of the magnet (20), in order to minimize the distance between the regions in which the reaction force of both the rotor core (10) and external cover (40) is applied on each magnet (20) under different temperature conditions of the rotor.

Abstract: A creepage block for a turbine rotor slot in which coil windings are embedded, wherein the creepage block is sandwiched between the windings and a wedge block, and wherein aligned radial cooling passages are formed in axially spaced locations in the windings and the wedge block. The creepage block includes a pair of solid half blocks in substantially parallel relationship, the blocks held in laterally spaced relation by a plurality of discrete spacers which may be dowel pins.

Abstract: In an electrodynamic apparatus, a method of securing a coil basket of the type that includes a plurality of top coils and a plurality of bottom coils to a bracing assembly that includes a plurality of support braces includes steps of banding the top coil, the bottom coil and the support brace to each other; positioning a number of inflatable bladders, respectively, between the top coils and the bottom coils in the location of the bandings; and simultaneously inflating the bladders to a predetermined pressure that is sufficient to tension the bandings to a predetermined force, whereby forces that are transmitted to the coil basket from such inflation are imparted evenly throughout the coil basket and at the same time. An improved end winding region support system is also described.

Abstract: In a binding (19) for winding overhangs (20) of rotors (1) of electric machines, essentially comprising a plastic matrix with fibrous material embedded therein, the binding (19) is formed by winding a fiber tape (15) onto the winding overhang (20). The plastic matrix is composed of a thermoplastic. Furthermore, a method is described for applying the fiber tape to the winding overhang of an electric machine.

Abstract: A method for repairing stress-induced cracks in a generator rotor keyway is disclosed. The method comprises disassembling the retaining ring and ring key from the rotor, and machining away the crack and surrounding rotor metal from the rotor keyway. The machining step may be performed in a lathe or milling machine. This method diminishes the labor cost, equipment cost, and down time required for crack repairs because the slot contents may remain in the slots during the entire repair process. A spacer ring and an enlarged key that may be inserted into the machined, enlarged keyway are also disclosed.

Abstract: A generator rotor that reduces friction force transmitted to rotor teeth by a retaining ring is disclosed. The friction force is caused by end windings pushing longitudinally outward against the retaining ring when the windings heat up during operation of the rotor. A ring key diminishes the friction force transmitted to a rotor teeth region by transmitting more of the friction force to a rotor pole region. The present invention accomplishes this reduction in transmission by either forming a gap between the ring key and the teeth regions, by producing only light contact between the ring key and the teeth regions, by the ring key being formed of a lower stiffness material in the areas in which it contacts the teeth regions, or by a combination of the above.

Abstract: In prior art multi-phase electric machines in which conductor parts are interlace to form conductor lanes for various phases, the connection points are on the winding end, thus permitting only a very limited local possibility for welding of the conductor ends. In addition, the manufacturing cost is increased with an odd number of phases, since the design is asymmetrical and a number of different formers necessary is relatively high. The invention calls for prefabricated conductor parts (17) to be welded or soldered in the zones which will subsequently be located in the soft magnetic body. Divided bars with a high conductor cross-sectional area are connected before the insertion of soft magnetic segments, connection zones which are large relative to the conductor cross-sectional area are realized, and problems with the insulation are avoided.

Abstract: An induction motor includes a stator defining stator inner and outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and circumferentially about the longitudinal axis between the stator inner diameter and the stator outer diameter and passing an electric current therethrough to create a magnetic field, a rotor extends along the longitudinal axis having a rotor length and a rotor outer diameter less than the stator inner diameter, the rotor being rotatable about the longitudinal axis relative to the stator, the rotor including at least one electrically conductive bar extending parallel to the longitudinal axis adjacent the rotor outer diameter for receiving an induced current due to the magnetic field, an end cap at each end of the rotor contacting the at least one electrically conductive bar and a capture ring attached to each end of the rotor to prevent movement between the end caps and the rotor.

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: A motor rotor for use in a grinder or other electromotive tool in which a motor winding is prevented from being damaged by collisions with particles. The motor rotor is composed of a core having sixteen teeth extending radially relative to a rotation shaft and slots formed among the teeth, a coil of winding wound around the slots, and wedge members for covering the slots. Felt strip members are wound around the parts of the coil exposed at both ends of the core before the exposed parts are impregnated with varnish. Varnish also permeates the strip members, and the strip members are firmly adhered to the exposed parts of the coil. After the varnish dries, the strip members fix themselves and are provided with a strength equal to that of plastic. The ribs provided by the strip members act as fins blowing away any particles, thereby protecting the coil from damage from the particles.

Abstract: A remote frequency adjustment system for controlling the vibrational frequency of the coils of a stator of a turbine generator. The system includes a top coil and a bottom coil supported by a coil support brace and a frequency adjustment system that allows for remote adjustment of the characteristic frequency of the coils.

Abstract: An electric machine having a stator winding which is impregnated by total immersion. The bar ends of the stator winding have soldering lugs which are insulated from one another and with respect to grounded housing parts. In order to simplify the assembly of the soldering lug insulation and at the same time to improve heat transfer, the soldering lugs are surrounded on all sides by a deformable insulating material with is pervious to impregnating resin. The insulating material is fixed by means of a shrinkable fabric which is likewise pervious to the impregnating resin. The insulation and shrinkable fabric are impregnated and cured at the same time as the winding insulation.

Abstract: The present invention is an insulating end cap which provides mechanical support to the end turns of the coils. The mechanical support provides insulation by axially, radially and diametrically separating end turns of coils within phases, and end turns of coils of different phases. Additionally, mechanical insulative support is given to coil-to-coil crossovers and also to coil-to-terminal connections. The end cap may be formed integrally by an injection molding method. Further, the end cap removes the need for a cuffed, grain-oriented insulative lamination stack slot liner by providing support for the liner. The liner becomes independent of stack length. The end cap is designed to be symmetrical and one end cap design is suitable for use at both ends of an armature.

Abstract: In an electrodynamic apparatus, a method of securing a coil basket of the type that includes a plurality of top coils and a plurality of bottom coils to a bracing assembly that includes a plurality of support braces includes steps of banding the top coil, the bottom coil and the support brace to each other; positioning a number of inflatable bladders, respectively, between the top coils and the bottom coils in the location of the bandings; and simultaneously inflating the bladders to a predetermined pressure that is sufficient to tension the bandings to a predetermined force, whereby forces that are transmitted to the coil basket from such inflation are imparted evenly throughout the coil basket and at the same time.

Abstract: A winding support for a rotary electrical component has axially extending poles and a plurality of windings which are wound on the poles so as to project beyond axial ends of the poles spaced apart in the direction of an axis of rotation of the rotary electrical component. The winding support comprises a first part formed from insulative material having spaced apart fingers to be positioned in respective spaces between the windings projecting beyond an axial end of one said pole and a second part arranged to be fastened to the first part for holding the windings in place relative to the first part. The first part preferably comprises a separator member having the spaced apart fingers thereon and a support member for the separator member arranged outboard of and formed of a different material from the separator member.

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: Cooling of the rotor endwindings in a dynamoelectric machine is improved by providing radially-extending ducts in the spacers located between the concentric end turns of the rotor winding. The ducts have an inlet located near the radially inward end of the spacer and an outlet located near the radially outward end of the spacer. The inlet can be formed on either an axially-oriented surface of the spacer or a circumferentially-oriented surface of the spacer. The ducts direct cooling air into the cavities between the end turns in such a manner that the circulation velocity in the cavities is increased. This results in increased heat removal capability.

Abstract: In the rotor of an electric machine, in particular a motor-generator set for pumped storage units, the rotor body (6), which is constructed from laminated metal sheets, is held together by axially extending clamping bolts (8). The rotor winding (16) is inserted in slots on the outer circumference of the rotor body and held there against the effect of centrifugal force. The winding ends (16a), which emerge axially from the rotor body and form the winding overhang (17), are secured against the effect of centrifugal force by radially extending stud bolts (37) which are screwed into a support ring arrangement (19, . . . , 24). The support ring arrangement comprises a plurality of rings (19, . . . , 24) spaced apart in the axial direction. The rings in the section near the axis of the rotor body are clamped together together with the press fingers (30) by means of the tension bolt (8) axially penetrating the rotor body.

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: Known flat winding layers that can be prefabricated and inserted into soft magnetic bodies insufficiently utilize the available space in the grooves and winding overhang of polyphase machines and thus increase the volume and weight of the machine. A new winding design allows high power and force densities to be obtained, thanks to the utilization of the whole available space, and are economic to produce. For that purpose each winding layer (4d) is composed of several conductor lanes (22-24) whose number corresponds to the number of phases. The height of the conductor lanes is reduced at the points (25-33) where they intersect, due to the fact that the conductors are mutually offset, and thus pass over each other inside the layer. By variably adapting the width of the conductor the space in the winding overhang through which the magnetic flow is directed in the soft magnetic body is utilized.

Abstract: A rotor of a rotary electric-machine according to the present invention includes a rotor core, a distributed winding wound around the rotor core, a ring member arranged at an end of the rotor core in the axial direction and having an outside diameter which is substantially equal to the outside diameter of the rotor core, and a coupling member for coupling an end portion of the distributed winding to the ring member. The ring member has a plurality of rings arranged at both ends of the rotor core in the axial direction. The rings are arranged one above another. The coupling member has a leading member with a curved portion for leading the end portion of the distributed winding toward the center of the rotor core and a fixture for fixing the leading member into an inner peripheral portion of the ring member.

Abstract: A winding end restrainer for a rotary electrical component comprises a hollow body, location member for locating the body against rotation relative to the component and an insert locatable in the body so as to be non-rotatable relative thereto. Chambers are defined between the insert and the body for receiving respective sections of the winding ends. By preventing rotation of the hollow body and the insert relative to the rotary component, stresses which would otherwise be imparted to the winding ends are greatly reduced.

Abstract: In one embodiment of the present invention, a rotor of a "claw pole" alternator includes first and second pole pieces with intermeshing fingers. Magnetic inserts are provided made preferably of permanent magnet material. Each insert extends under the end of a pole finger of the rotor and has two surfaces which face radially outward from the rotor. The resulting design provides improved power output and reduced acoustic noise when compared with conventional alternators, in a design which is durable and amenable to mass production.

Abstract: A system for supporting a retaining ring on an end of body portion of a rotor in an electrodynamic system includes an end wedge which is adapted to be in contact with a retaining ring, a damper bar having a first surface which abuts the end wedge member and a second, oppositely facing surface; and a filler block positioned between the second surface of the damper bar and a field winding portion of a rotor. The filler block has a tapered surface which defines a stress-reducing gap between the field winding portion and the retaining ring, so as to minimize stress in the slot cell and field windings during high-speed rotation of the rotor.

Abstract: The rotary electrical component has first and second windings thereon and the connector comprises a body having first and second spaced apart sections which receive respective ends of the windings to be interconnected. An electrically conductive element extends between the two sections for connection to the winding ends. The sections include supports for resisting outward movement of the winding ends due to centrifugal force so as to reduce the likelihood of disconnection between the winding ends and the conductive element.

Abstract: An improved armature assembly includes an armature stack mounted coaxially with a rotatable shaft. Conductive windings are disposed in the armature stack in accordance with a preselected winding sequence. The conductive windings include end turns which extend longitudinally beyond the armature stack. End plates are disposed at opposing ends of the armature stack. Each end plate includes an integral banding ring in the form of a retaining flange located radially outwardly of, and in a supporting relation to, the end turns. Each end band further includes a centrally located aperture which is adapted to receive the rotatable shaft and maintain concentricity of between end plate, the armature stack and the rotatable shaft.

Abstract: An armature end protector for protecting rotor windings from the end of a rotor stack, includes a hub and a body portion. The body portion has a plurality of radially extending spokes which cover arms of laminated members of the rotor, at least in the region of the rotor windings. The body portion is fitted to and supported by the hub. A circumferentially extending ridge is formed on the hub to provide a stop against which the body portion abuts to correctly locate the body portion on the hub. The ridge also increases the electrical separation distance between the rotor windings and the rotor stack.

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: In a dynamoelectric generator, a low-resistance electrical contact is provided by using a spring below the rotor slot wedges to bias the wedges against the overlapping retaining rings. This biased contact between the wedges and retaining rings forms a conductive current path for high-frequency eddy currents induced on the surface of the rotor and retaining rings at all operating speeds and at rotor standstill. In addition, the spring reduces gauling between the rotor key slots, wedges and retaining ring.

Abstract: The armature (1) for high-speed electric motors force-ventilated in air containing abrasive dust, in particular in electric tools including right angle grinders, has windings which are laid in slots (7) of an armature laminate stack (5), and are held down in the slots (7) by elongated, elastic slot seals (15), and forth winding overhangs (9, 11) on the end faces of the armature. To increase the strength of the armature winding, the resistance to cooling air containing abrasive dust, and to improve the cooling, the slot seals (15) project over the slots (7), follow the contour of the winding overhangs (9, 11), in particular along surface lines, in the armature longitudinal direction, extend up to the end faces of the armature (1), and their ends are secured there by a ring (19) or cord winding (17).

Abstract: An armature for a fractional horsepower motor is provided with spiders 10A having spokes 20 and arms 24. The spiders 10A fit at at least an end of laminated armature stacks around which the armature windings are wrapped. The spokes 20 are profiled to provide upstanding rounded surfaces 23 for the windings and to reduce drag. Reduction in drag and the profiled shape of the spokes 20 improves air flow through the motor and reduces the tendency of build up of carbon dust in the region of the extremities A of arm of the laminated stack as well as reduce motor noise in use.

Abstract: A coil-end supporting apparatus comprising a holder comprising retainers for supporting the coil ends of a rotary machinery stator at both ends of a bar- or plate- shaped support and an insert perpendicularly intersecting the intermediate portion of the support in such a manner as to be inserted into a slot of a stator core; the holder supporting the coil ends; and a rotary-machinery stator equipped with the coil-end supporting apparatus.

Abstract: A solid series connector for electrically connecting a first half-coil to a second half-coil in a stator phase winding includes first and second solid conductor members which are fixedly electrically connected at both ends to groups of conductive strands in the respective half-coils. The connector is much less labor-intensive to install than the group transposition connections used in the past, is more rugged and durable under high temperatures and stresses, and is relatively compact. A second embodiment of the invention is a solid phase connector that incorporates many of the novel features in the solid series connector. A novel method of preparing a conductive strand group for connection to such connectors is also claimed.

Abstract: A zone block assembly for maintaining a pressure barrier in an end area of a rotor in an electrodynamic system such as an electrical generator includes a zone block which is constructed and arranged to be positioned between a rotor and an end winding in an electrodynamic system to maintain a pressure barrier; and a spring in contact with the zone block for biasing the zone block with respect to the rotor. The spring is fabricated from a material which is non-metallic, so that it will not create destructive metallic projectiles within the electrodynamic system if it breaks as a result of fatigue.

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 method of repairing the rotor showing tooth top cracking of a turbogenerator, wherein after removal of the rotor from the stator and of the existing retaining rings, the winding is protected with suitable cover materials, including sealing the whole with parafine, the entire shrink fit area is dry machined to an optimized geometry, the machined area is deburred, and after removal of the burrs and the covering and sealing material new retaining rings are fitted. The main advantage is the possibility to carry out the method on site.

Abstract: The cap for the series loop includes a pair of identical cap sections each having side walls, an end wall having first and second segments offset in a longitudinal direction and a cover extending between the side walls and from the end wall on one side of the cap. A longitudinally extending tab lies adjacent one side wall defining a slot for receiving an opposite wall section of the other cap section when assembled. In assembly, the side walls and end wall segments of the respective cap sections are respectively intermeshed to form an enclosure open at one end for receiving the series loop, the enclosure being adjustable in width depending upon the magnitude of the intermeshing of the sections.

Abstract: Disclosed is a rotor body for an electric machine having slots for windings and slot keys with wedges for retaining the windings in the slots. The slot keys contain elongated spring strips underlying an amortisseur, in turn, underlying the wedges in the slot keys. The spring strips bias the amortisseur and wedges radially outwardly. Thus, the wedges lie in sufficient, low-resistance, efficient electrical contact with the rotor body at start-up and during low rotor speeds to prevent arcing and localized heating along the interfaces of the rotor parts otherwise resultant from induced surface currents at start-up and low rotor speeds. At the rotor ends, the spring strips bias the amortisseur ends radially outwardly into efficient electrical contact with retaining rings at opposite ends of the rotor body.

Abstract: A flexible main lead connector design for connecting an end turn of a rotor winding of a generator/motor to a terminal stud. The connector includes a first elongate, radially directed, conductive member attached to the rotor winding and a second elongate conductor member connected to the centralized terminal stud. The first conductive member has an inverted "T" shape with its base tapering from a relatively thick central portion to relatively thin outer portions. The second conductor member has a central "T" shaped portion and two relatively thin peripheral band portions shaped to generally follow the side and lower top surfaces of the central "T" shaped portion. The bands continue in a curved manner toward and join with the relatively thin outer portions of the first conductive member and thus form a flexible connector allowing relative movement between the first and second conductive members.

Abstract: In a dynamoelectric generator, a low-resistance electrical contact is provided by a cantilever beam mounted between the outer surface of the rotor body and an overlapping retaining ring. This cantilever beam is part of the wedges in the rotor body and provides a conductive current path for high-frequency eddy currents induced on the surface of the rotor and retaining rings at all operating speeds.

Abstract: In a dynamoelectric generator, a low-resistance electrical contact is provided by a multilam or belleville spring mounted between the outer surface of the rotor body and an overlapping retaining ring. This contact forms a conductive current path for high-frequency eddy currents induced on the surface of the rotor and retaining rings at all operating speeds.

Abstract: A generator rotor pole crossover including a substantially U-shaped portion from which extend legs curving outwardly. The U-shaped portion is thickened in one direction but thinned in another direction, relative to the leg thickness. This configuration provides flexibility to the crossover, decreased stress and relatively constant cross section of resistance purposes. The legs are brazed to the copper conductor winding ends by scarf and lap joints, respectively. The crossover may replace defective crossovers in the field by removing only the end plate of the generator. This allows installation in a short time without risk of damage to generator insulation.

Abstract: An armature of an electric motor, having an armature core and an armature coil wound thereon, comprises a steel ring fitted on the armature coil for preventing the armature coil from being scattered by centrifugal force applied thereto during rotation of the motor, the steel ring having a coating of insulating material and adapted to be fitted on the armature coil directly.

Abstract: A rotary electrical device has a rotor body for receiving an inner retaining ring. A primary retaining ring is formed of a composite of epoxy and graphite fibers and has an integrally embedded auxiliary ring at one end thereof adjacent its open end. The auxiliary ring and inner retaining ring have complementary tapered surfaces with axially spaced, circumferentially extending seals therebetween. The inner retaining ring has fluid lines for receiving fluid under high pressure to facilitate axial assembly and a disassembly of the retaining ring relative to the rotor body. The retaining ring has a corrugated spring to accommodate differential expansion of the end windings of the electrical device and the composite retaining ring. A short-circuiting ring is at the inside diameter of the primary retaining ring. A corrugated spring is interposed between the primary retaining ring and the short-circuiting ring.

Abstract: A rotor for an electric rotating machine includes a rotor winding, and a feeder lead wire connected to an inner end of the rotor winding so as to supply field current to the rotor winding. The feeder lead wire has a rising portion extending radially outwardly of a rotatable shaft, and a connecting terminal extending from the rising portion in a circumferential direction of the rotatable shaft.

Abstract: A rotor assembly for an electric motor includes a plurality of laminations disposed in a stack, a tension rod extending axially through the rotor lamination stack, and end clamps disposed at each end of the rotor lamiantion stack and secured to the tension rod for compressing the stack to hold the laminations of the stack fixedly in position by compression. A method of stamping rotor and stator laminations for a doubly salient electric motor from a single piece of metal includes the steps of stamping a rotor lamination out of the piece of metal, and stamping the stator lamination out of the piece of metal offset from the stamping of the rotor lamination so that a tooth of the rotor lamiantion stamping is taken from the gap between two teeth of the stator lamination stamping. The centroids of the rotor and stator laminations in their stamped locations in the piece of metal are offset from one another.

Abstract: A retaining ring system for a rotating electrical device such as a generator, motor, or condenser, including an auxiliary ring adapted to be removably mounted around the end portion of the rotor of the rotating electrical device bridging the rotor winding slots, and a retaining ring removably mounted around the first ring. The retaining ring supports the amortisseur and the field end windings of the rotating electrical device. An external first taper defined by the auxiliary ring and an internal second taper defined by the retaining ring provide mating, continuous first and second tapered surfaces. The assembly process is begun by sliding or jacking the auxiliary ring onto the rotor. A high pressure feed fluid line defined in the auxiliary ring includes an inlet port and an outlet port opening at a circumferential groove between the mating first and second tapered surfaces between O-ring seals.

Abstract: A biased securement system for the end winding conductors of a turbine generator includes a support ring with a biased wedge system located between the end windings to compress them in both a radial and circumferential direction. A triangular shaped wedge is secured to the support ring between a pair of confronting spacer blocks having angular surfaces converging in the direction of the support ring. Belleville washers are disposed in a recess in one of the spacer blocks, with a slide plate therebetween which is held in place by a lock plate to retain the same in position.