Dynamoelectric machine

An apparatus and method for producing a replicate, void free, impermeable, ymmetrical electrical insulation barrier for stator motor coils is described wherein a silicone rubber compound is employed as an insulator around the preformed stator coils in a copper-beryllium mold. The coil insulation is cured...     

Apparatus for assembling coils into the slots of stators and the like including a plurality of radially extending risers movable through a stator bore to lead pole coil groups into stator slots and a plurality of radially extending protuberances for urging trailing portions of the coils radially outwardly...     

A dynamoelectric machine including stator and armature structures. The stator includes a yoke and a plurality of pole shoes carried thereby which include slots for receiving compensating coils. Strand-like elements are tightly packed within the slots between the compensating coils and the slot walls...     

An apparatus for attaching slotted plate terminals or the like to individual wires such as the wires of a stator coil in an induction motor is disclosed. A rotatable arbor positions the stator in alignment with an insertion track and ram. A terminal is inserted by moving it along the tracks and into...     

Lead wires from the field coils of a two-coil, two-pole stator for a motor of the universal type are wound about posts projecting outwardly from a wire retainer mounted to the stator by means of cannulas encircling said posts and having hook portions for engaging the coil lead wires. Lead support means...     

This invention relates to apparatus for inserting prewound coils into the slots of a stator or of a field carrying member of a dynamoelectric device wherein pinching the coils during the insertion stage is reduced and wherein damage to the lamellae of the apparatus is substantially reduced.

The connecting wires between armatures wound by an automatic armature winding machine are clamped closely adjacent the commutator tangs with the finish wires hooked to the tangs of the wound armatures and the start wires looped about selected tangs of the armatures about to be wound. The clamped wire...     

A winding insertion device for axially inserting the windings of a dynamoelectric machine is provided with a pair of blade holders axially aligned with respect to one another. A first set of blades is attached to one of the blade holders, and a second set of blades is attached to the second blade holder....     

A supporting mandrel receives a plurality of electrical motor core laminations in columnar relation. An overhead ram carrying a ram head is in movable relation towards and away from the supporting mandrel along the columnar axis. A cylinder is formed in the ram head opening towards the supporting mandrel....     

A method of assembling an electric machine consists of placing a rotor within a stator having resilient inserts preassembled thereon. At least two ropes are secured to the inserts, each rope being passed through a radial ventilating duct of the stator. The ropes are secured to the top of said resilient...     

A motor stator having a salient pole magnetic core on which are wound coils of conductive wire incorporating an annular printed circuit board having a plurality of radially projecting terminals. The printed circuit board is secured directly to the projecting ends of the coils at one end of the core and...     

According to the invention, electrically conductive paths are formed between the coil armor and the core laminations of dynamoelectric machines for inhibiting corona. This is achieved by injecting an uncured, semiconducting, elastomeric material between the coil sides and slot walls through the use of...     

A method of assembling an electric motor in which a rigid first end bell is provided with a bearing seat in which is positioned a bearing. Then a rotor shaft for the motor is positioned in the bearing, and the end bell and rotor assembly is fixed in a holding fixture including a plurality of spaced shims,...     

A method of manufacturing an orthocyclic electric coil deviating from a circular shape, and an article made by this method. A circular orthocyclical wire coil is wound with a wire surrounded by an adhesive. The coil is then deformed by bending transversely to the coil axis, during the formation the adhesive...     

A dynamoelectric machine core, method of forming the same, and apparatus for forming the same. The core includes a stacked laminated yoke assembly having an annular array of radially inwardly opening recesses, a stacked laminated tooth assembly having an annular array of annularly spaced teeth defining...     

An injection shuttle system is disclosed for fabricating stator core assemblies. Injection tooling and a stator core are selected and positioned on a shuttle means at a selection station for moving to coil loading stations and a transfer station. The injection tooling is positioned, aligned and manipulated...     

The axial end play of dynamoelectric machine may be adjusted by adjusting the axial position of a machine bearing relative to the machine rotor. A relatively large electric motor is illustrated wherein the amount and position of the axial end play of the rotor may be adjusted without disassembly of the...     

The invention provides a new method of making electric motor stator assemblies of the type comprising a magnetic stator body with a plurality of discrete poles and a coil wound on each pole. Preferably each stator assembly is made by (a) providing a flexible chain of hollow bobbins with terminal pins...     

A stator core including a central cylindrical opening defined by a plurality of teeth consecutive through a circumferential continuous portion is prepared by winding a magnetic strip having a corresponding shape into a spiral. A forming cylindrical rod having a diameter larger than the inside diameter...     

A prime mover has a stationary assembly with a pair of opposite pole winding arrangements adapted for energization to establish a magnetic field, a non-ferrous end plate, and a rotatable assembly magnetically associated with the stationary assembly and having a part rotatably supported in the end plate....     

Four carriers are disposed at 90.degree. intervals about the axis of rotation. A wound core formed on a mandrel is shifted to one of the carriers contacted with the mandrel. The carrier with the core is rotated through 90.degree. to reach a compression unit and the core is compressed through the movement...     

A dynamoelectric machine core, method of forming the same, and apparatus for forming the same. The core includes a stacked laminated yoke assembly having an annular array of radially inwardly opening recesses, a stacked laminated tooth assembly having an annular array of annularly spaced teeth defining...     

A method is provided for assembling a device in a preselected assembly position onto a rotatable shaft of a prime mover with respect to an opening in an end plate of the prime mover through which the shaft extends so as to preclude contamination of a lubricant in a lubrication system of the prime mover...     

A complete stator of an electric motor is mounted into a cylindrical sheet metal housing by first mounting the stator between two facing concentric mandrels. The housing, the inner diameter of which is less than the outer diameter of the stator is heated and then mounted over the mandrels and stator....     

A stepped combination apparatus comprises transferring means for moving a bundle of component wires arranged in plural rows and plural lines in the longitudinal direction; pushing means for pushing the component wires to the line direction to put out a component wire at the opposite side; shifting means...     

An electric generator to be mounted on an agricultural tractor or the like is proposed, in which a rotor and its related parts and a stator and its related parts are molded of plastics into integral units, respectively. The construction is much simpler than that of the conventional generators.

In an electric stepping motor, a pair of core members are held in intimate contact within the coil by outwardly extending coil-engaging means on the core members being in interference fit with inner turns of wire of the coil. No supplementary fastening means such as adhesive, screws or the like are required...     

Single and multi-phase, multi-pole arrays of adjacent equivalent current loops are formed in a self-supporting structure as wound. The multi-pole windings are formed by zig-zag winding elements having peaks and troughs. The peaks and troughs of each winding element form alternate halves of adjacent effective...     

A method and apparatus for winding axial air gap motor cores, using prepunched strip material, so that the finished cores have radially aligned slots. The invention includes a precise movement of the winding mandrel away from the punching means to gradually increase the interslot gap for each slot. The...     

A method for fitting magnetic wedges which comprises steps of passing a current through a stator winding on a stator core of an electric rotary machine to produce magnetic flux passing through slot openings, successively forcing the magnetic wedges in the slot openings while keeping the winding energized...     

An improved coil insertion apparatus for inserting coils, for example, into stator cores of electrical rotary machines, in which blades and a coil pusher of the apparatus are arranged to be movable at optimum timing and speed suitable for various winding specifications of stators so as to make it possible...     

A dynamoelectric machine core, method of forming the same, and apparatus for forming the same. The core includes a stacked laminated yoke assembly having an annular array of radially inwardly opening recesses, a stacked laminated tooth assembly having an annular array of annularly spaced teeth defining...     

A coil winding and inserting machine suitable for winding stator coils of 3-phase multipolar motors. The machine has a plurality of independently liftable tooling blades and auxiliary plates. Three winding forms are formed simultaneously or in a predetermined sequence, each being constituted by two tooling...     

An apparatus reduces the insertion-required force in a coil inserting apparatus. A coil and an insulating material piece are automatically inserted into the groove of a stator core by the operation of a coil pusher. A current flows from a piezo-electric element accommodated within the coil pusher, when...     

A method of forming a bearing having a body of sintered powder metal. The bearing body includes a plurality of surfaces with interstices in the sintered powder metal defining a plurality of lubricant flow capillary paths through the bearing body communicating with the surfaces thereof, respectively....     

A mounting arrangement for an electromotor having an elongated shaft includes a pair of bearings positioned on two opposite ends of the shaft and a pair of bearing covers closing the openings in an electromotor housing through which the elongated shaft extends. The bearing covers are permanently deformable...     

A stator of a submerged motor is provided with cylinders formed of carbon fiber reinforced plastics of superhigh precision. To obtain flawless joints between the cylinders of carbon fiber reinforced plastics and the end covers increased wall thickness portions are provided at opposite axial end portions...     

A computer controlled apparatus and method for winding electro-magnetic members such as stators comprising a stator holder, motor means for rotating the stator holder, a wire dispensing cylinder, motor means for moving the dispensing means longitudinal of the member to be wound, motor means for feeding...     

An electrical generator has a rapidly replaceable bearing assembly and motor mounting. The generator is of the type having a housing holding an armature secured to a generator shaft rotating within the interior of the housing. The housing has a passage through the housing end bell. A bearing assembly...     

In a fixed field inductor-type generator having an annular stator core on which an armature coil is wound and a field coil which is disposed stationary in said stator core, the field coil is located in space defined by a pair of rotatable pawl-like magnetic poles that are opposed to each other and are...     

An axial flux induction electric motor and method and apparatus for the production thereof, said motor having a rotor and stator, each formed of a core consisting of metal strip having holes punched therein at longitudinally spaced locations so that holes on the core form radially extending slots on...     

A submerged electric motor comprises an outer hollow cylinder formed of a stainless steel, a stator iron core fixed on the inside of the outer cylinder, an annular end plate of a general structural rolled steel welded to an annular end portion formed between the outer hollow cylinder and an inner hollow...     

A method of inserting coils into the slots of a stator iron core by moving a pressing piece and a blade supporter which are formed as separate bodies comprises a step of holding said coils by first blades fixed to said pressing piece and second blades fixed to said blade supporter, a step of moving forward...     

A coil fitting system including a pressing member for fitting in slots of an iron core of an electric rotary machine in one operation step a plurality of coils arranged in such a manner that a portion of one coil end portion overlaps a portion of another coil end portion. The pressing member which is...     

An electronically commutated d.c. motor having a dome-shaped external rotor and a stator of a double-T-shaped configuration. Stator includes one yoke stack disposed asymmetrically in relation to the longitudinal stator axis. In addition, the stator includes two pole stacks each of which is provided on...     

A shaper for the coils of large rotary electric machines bends an elongate loop coil blank so that the inwardly-directed faces (15) of the straight parallel sections are turned downwardly so that the ends (14) of the coil "kink" downwardly, thereby making possible a downwardly directed mallet blow for...     

In manufacturing a DC motor body (1) including a motor magnet (2), conventionally, a magnetized magnet (2) is fitted to one by one to the cylindrical molding core (11) and a motor body is injection-molded within a cavity formed between a motor body forming mold (10) and a cylindrical molding core (11)...     

A field subassembly is assembled by positioning two coil supports adjacent respective core end faces of a ferromagnetic core. The core-engaging surfaces of the coil supports and the core end faces have respective surfaces which are uninterrupted by projections. During the assembly of the field, fasteners...     

A stator for rotating electric machine includes a stator body having a stator core and a stator coil, a pair of stator clampers of a ring form which hold the stator core by clamping the same with their inner side surfaces from both sides of the stator core, a pair of stator supporting members of a ring...     

An apparatus and method for inserting field windings in axial flux electric machines. Preferably each field winding is wound in the form of a spiral of wire on an elongate former. The former is then reduced in external dimensions and a press member moves along the former to push the turns into a pair...     

A method and apparatus for winding field coils on internal poles of stator bodies, particularly for electric motors, have a magnet wire feeding needle or needles displaced eccentrically from the central armature axis of the stator body. The or each such feeding needle is disposed to reciprocate and partially...     

Electrical coils for electrical machines are prepared by forming a number of parallel conductors side by side and separating the conductors and surrounding the conductors with insulating material impregnated with thermosetting resin. The resin is cured by radiating the coil with radio frequency electro...     

In a method of assembling a stator, a casing of a terminal assembly is placed in seating relation with a circumferential surface of the stator and secured in such seating relation. Integral winding leads of the stator winding means are spanned across an outer circumferential portion of an end turn grouping...     

A molded-type underwater motor is equipped with a stator core impregnated with varnish, powder coatings provided on the perimeters of coil ends projecting from the sides of the stator core, and a resin molded body covering both the powder coated coil ends and the stator core. A resin of the same family...     

A coil assembly machine for automatic loading of stator cores for dynamoelectric machines, automatic winding insertion, high speed wedge manufacture, automatic wedge insertion, and automatic core removal from the machine is provided in a construction of relatively low cost and high productivity. The...     

A dynamoelectric machine with an axially symmetric rotor and shaft allows the rotor to be reoriented end-for-end within the machine. The machine includes an etched foil heating assembly, an indexable power conduit assembly, and a compartmentalized accessories conduit assembly selectively connected to...     

A winding method for winding the coils of a stator structure which has one or more intermediate coils and a pair of end coils having a reduced number of turns. The coil or coils may be directly connected to supply terminals and the coils are connected in series. The method involves using a dummy connector...     

A winding method for winding the parallel connected coils of the stator structure of an electromagnetic device, the individual coils being connected in parallel to a pair of supply terminals. On completion of one coil the wire is led into the adjacent groove to be occupied by the next coil to be wound...     

A method for making a unit-bearing motor wherein a drawn steel cup-shaped frame has a base and a longitudinal axis, an elongated metallic post is shaped with an outer cylindrical mounting surface at a first end and disposed in a coaxial aperture in the frame base, an annular shoulder is formed on the...     

A laminated core of a stator of a universal motor consists of two core parts each of which bounds a portion of a central opening through the stator. The stator has at least one field winding, and at least one longitudinal part of this field winding, running in the direction of the longitudinal axis of...     

A film is disclosed which will accommodate high shear strain in a rigidly supported epoxy impregnated Nb.sub.3 Sn superconducting coil (SCC). In a generator application the SCC is subjected to a combined load due to differential thermal contraction, magnetic, and centrifugal forces. These strains could...     

A base assembly for mounting a dynamo-electric machine on a planar mounting surface includes a generally rectangular metal sheet with flat foot portions and a cradle portion intermediate the foot portions. Leg portions of the metal sheet each incline upwardly from a corresponding foot portion to support...     

An apparatus for use as an alignment and centering tool for providing a fixed spatial alignment between a rotor and a stator, including a base member and at least one finger member fixedly secured to the base member and extending generally therefrom. The finger member is adapted to be positioned between...     

Apparatus for predeterminately sizing a core has a pair of generally opposed dies operable for compressing only an outer circumferential section of the core defined generally axially between a pair of opposite end faces of the core at least generally adjacent an outer circumferential surface thereof,...     

Transfer and inserter tooling for receiving coil windings from a coil winder such as a shed winder, and for inserting the coils into a dynamoelectric component such as a motor stator. The tooling includes a transfer tool molded of plastic and providing a cylindrical array of cantilever-supported fingers....     

A miniature motor having a cup-shaped cylindrical motor case fitted with a plurality of motor mounting holes and a bearing on the closed end face thereof, and a rotor rotatably supported at one end of the shaft thereof in the motor case by the bearing provided on the closed end face of the motor case,...     

The method of forming a compact resolver/encoder assembly which is impervious to moisture, comprises several steps. First a number of electronic components of the resolver/encoder are mounted on a flexible printed circuit board. The circuit board is then folded into a generally cylindrical envelope and...     

A proximity switch actuated by a press driven plunger is employed to generate a control signal at a predetermined point in the operating cycle of a high-speed stamping press when a press carried punch is at a precisely predetermined elevation above the die surface. Locating devices are provided for accurately...     

A unit-bearing motor wherein a drawn steel cup-shaped frame has a base and a longitudinal axis, an elongated metallic post is shaped with an outer cylindrical mounting surface at a first end and disposed in a coaxial aperture in the frame base, an annular shoulder is formed on the metallic post adjacent...     

A method of terminating a set of leads integral with a winding on a dynamoelectric machine stator assembly with the winding and the leads formed of magnet wire having a conductor with a dielectric material coating adhered in insulating relation thereto, and a set of dielectric tubes extend about the...     

A coil form bobbin (20) for winding coil winding wire is a flat disk (22) formed with a plurality of peripheral radial slots (24,25,26) comprising at least one set of n slots spaced around the periphery of the flat disk dividing the bobbin into a respective set of n segments. The slots extend from the...     

A method of making a multiphase winding package and placing it into the grooves of a linear stator being mounted, with open grooves facing down, on the underside of a support and carrier plate, includes storing and paying individual ones of a plurality of separate cables on a vehicle while moving the...     

A large scale horizontal axis rotary electrical machine has a stator with a laminated annular core resting upon an open-topped support structure. At one position along its length the core is axially fixed to the support structure but is otherwise free to move axially on the structure to accommodate differential...     

A novel brushless electric motor is characterized by a printed circuit board having at least one integral portion extending from the printed circuit board plane for establishing the interrelationship between the printed circuit board and another motor component. The present motor has a more precisely...     

A magnet shield having a recessed area for receiving a demagnetized permanent magnet. The magnet and shield are axially inserted between the armature and cylindrical frame of a motor. Locating legs, formed on the end heads between which the cylindrical frame mounts, serve to guide and locate the magnet...     

A stator coil former is separated into forming sections and block supports. The forming sections are preferably separated into three sections: a cell bend forming section, an involute forming section and a lead bend forming section. The cell and lead bend forming sections may be repeatedly used while...     

A P.M. d.c. motor in which the permanent magnets thereof are provided as thin arcuate segments of predetermined length which rotate about a circular locus of core component defining poles. The paired permanent magnets are configured to slightly straddle the end surfaces of the core components as they...     

A method for predeterminately sizing a core using a pair of generally opposed die means operable for compressing only an outer circumferential section of the core defined generally axially between a pair of opposite end faces of the core at least generally adjacent an outer circumferential surface thereof,...     

A cross-coil winding system for forming woven stator coil windings for an air-core gauge that has orthogonal coils with equal radii. The system employs a bobbin positioner that moves a bobbin along a path in a manner that permits forming layers of interlaced windings about the bobbin.

The insertion finger is made of a striptype heart (10) and sheet metal lips (16) connected thereto. It is intended for use with a device for inserting coils in stators of electrical machines. More specifically, it is used for the insertion of coils into grooves of helical stator sheet packages. For that...     

An apparatus for treating cores has an endless conveyor operable with discrete intermittent movements between a plurality of preselected positions defined in a predetermined course of the endless conveyor with a preselected dwell period between each of the discrete intermittent movements, respectively....     

A machine for winding two-pole stators includes a revolving table around which are located at least three working stations: a station to feed the machine with unwound stators from a conveyor placed alongside the machine and for returning the wound stators to the conveyor; a winding station where one...     

The axial end portions of the insulating members which are used to line the longitudinal channels formed between circumferentially adjacent, radially inwardly projecting poles in a stator (e.g., an electric motor stator) are protected from damage by the wire being wound by providing terminal boards at...     

A motor is disclosed wherein electro-static repulsion and attraction between electrically charged electrodes provided on a stator and the charges on the surface of a pair of rotor electrodes are used to drive the rotor to rotate within the stator. In another embodiment the moving element is a rod or...     

A snap ring is provided for receipt within a circumferential groove of a bore to maintain a motor shaft and bearing assembly within a housing. The ring has an open sector to allow for flexibility. In one embodiment, a number of lobes, defined by tapered inwardly declining surfaces extend from the ring...     

A rotating rectifier assembly which can be used in a brushless electrical generator comprises an arrangement for supporting diode semiconductor devices in an axially loaded assembly of components within a housing of the rectifier assembly without compressively loading the diode semiconductor devices...     

A rotary machine having a stator assembly constructed by joining brackets to a stator core by all-round laser welding without entailing the thermal deformation of those components. The omission of through-bolts for fastening together the stator core and the brackets and the resultant omission of through...     

A method involving modifications to a conventional electrical motor for the purpose of increasing its resistance to being damaged by the use of water or other liquids in its environment. The motor is disassembled, and all exposed areas of the stator windings are coated with an epoxy which forms a pliable...     

A brushless alternator for a vehicle comprising a field coil holding device formed by mounting a field coil winding spool directly on a field core using a bonding agent thus eliminating the need for a metallic cylindrical spool holder which requires precise machining in order to engage with the field...     

A switched reluctance motor has a stator with a plurality of salient motor poles disposed about a central bore. A rotor having an even number of rotor poles is disposed for rotation in the central bore. Magnetizing phase windings are associated with the stator poles for selectively generating magnetic...     

A method for manufacturing a stator of a motor having a coil wound on a ring-shaped core having a plurality of slots. The coil is first preformed into a chevron-shape before being mounted on the core so that the chevron-shaped coil comprises front coil end portions positioned within the inner diameter...     

Improvements in the primary and the secondary of linear induction motors for a SAILRAIL air bearing support and conveying systems increase the efficiency of such systems. In the primary the core includes a plurality of laterally adjacent toothed laminations with the edges of the teeth being complementarily...     

A machine for winding two-pole stators includes a revolving table around which are located at least three working stations: a station to feed the machine with unwound stators from a conveyor placed alongside the machine and for returning the wound stators to the conveyor; a winding station where one...     

A die for manufacturing a laminated core for a rotor or a stator for an electric motor or a generator including rotary stacking and a skewing using a rotary die to stack the thin iron plates punched to a predetermined shape. Rotation of the crank shaft of the press is converted into a rotary stacking...     

A motor positioning method includes steps of: providing a frame of a disk drive apparatus having locating holes spaced apart from each other, the locating holes being located in accordance with a predetermined positional relationship between the locating holes and a target position; placing a positioning...     

A motor field assembly and method for constructing a permanent magnet motor wherein the shell is formed of relatively thick flat sheet stock as two rectangular portions and an elongated connecting portion. The rectangular portions are rolled into semi-cylindrical shapes and the connecting portion is...     

Micromechanical devices are formed on a substrate using a sacrificial layer deep X-ray lithography process to produce a rotating microrotor which is driven magnetically. The rotor typically has a diameter of a few hundred microns or less and is formed as a free structure which is assembled onto a hub...     

The motor provided includes a unique laminated stator core and a means for changing the continuity of the magnetic circuit. The stator core structure is split into two part-cylindrical elements which define spaces between their opposing ends. Flux gates fill the spaces and provide magnetic circuit continuity....     

A method and apparatus for shaping the winding end turns of a stator assembly wherein the outside diameter of the end turns is first engaged by a set of alternate segments in a circular array and is thereafter engaged by a set of intervening segments of the array while the first set remains engaged....     

A method of manufacturing a motor comprises the steps of punching intermediary products of stator cores out of steel bands along profile lines with the intermediary products partly connected to the steel bands, forming wire winding frames of synthetic resin around magnetic core pieces of the intermediary...