Abstract: A stator assembly of an electric machine includes a segmented lamination stack formed of an interconnected series of lamination segment stacks, and a plurality of coil isolators each having a conductor wound thereon, each having a radially outward interlock at each circumferential end thereof, and each having a radially inward interlock at each circumferential end thereof, the coil isolators being serially connected by the interlocks to form a cavity closed down the axial length of the stator assembly, the coil isolators electrically insulating the lamination segments from the conductors.

Abstract: An apparatus (structure) is provided to support a superconductor winding (61) of an electromotive machine. One or more elongated loops (74) and appropriate support structure (120) may be arranged to provide radial and tangential support to the superconducting winding (61). The elongated loops may be made of a material substantially resistant to heat flow. An axially-extending base assembly (100) may be arranged to anchor loops (74) with respect to the rotor core at a proximate end (76) of the elongated loops. A cradle (80) may be configured to define a recess (82) to receive the superconductor winding and to support the elongated loops at a distal end (78) of the loops.

Abstract: A wedge for a stator of a generator with preformed coil windings includes a retaining portion for retaining coil windings. The retaining portion covers at least part of two neighbouring stator slots. A mounting projection at a bottom surface of the retaining portion for mounting the wedge to a top surface of a stator tooth is located between the two neighbouring stator slots.

Abstract: The concentrated winding coil is mounted onto a tooth such that a coil end portion is housed inside a concave space that is formed by the trunk portion and first and second guide portions at two axial ends of the tooth. Third cover portions of an insulating sheet that is disposed on two circumferential sides of the tooth are folded over so as to overlap with each other and extend so as to cover the coil end portion of the concentrated winding coil, and a second leader line that projects outward from a radially inner end portion of the concentrated winding coil is bent and led radially outward parallel to the coil end portion that is covered by the third cover portions.

Abstract: A rotor of an electrical machine has slots which are tapered on an inlet side, a machine winding having winding overhangs, a cord lashing which reaches over the winding overhangs, extends in the slots, and is formed by a cord, and at least one end of the cord is pressed by a filler element inserted in one of the slots in order to fix it in position in an interstice of the slot formed between the machine winding and the slot taper.

Abstract: The invention relates to a stator of an electrical machine, with at least one stator tooth and a coil wound outside of the stator, which coil has been pushed onto the stator tooth substantially radially. It is provided that the coil (4) is held radially on the stator tooth (2) by means of at least one form-fitting connection (13). Furthermore, the invention relates to an electrical machine with such a stator (1).

Abstract: A coil fixing device capable of accurately positioning and fixing a coil to a slot of a stator core of an electric motor, and an electric motor having the fixing device, while not using adhesive and having a structure not affecting the characteristic of the electric motor. A positioning member of the fixing device has a coupling member positioned at an axial end of the stator core; a plurality of protruding portions connected to the coupling member at the same angular intervals as the coils, each protruding portion radially inwardly extending from the coupling member; and a latching portion connected to a front end of each protruding portion, the latching portion extending from the front end of each protruding portion in a direction across an extending direction of the protruding portion.

Abstract: In an expansion sheet for a rotary electric machine that has a thermal expansion property and is to be arranged between a core and a coil conductor in a slot in the rotary electric machine, in which the coil conductor is housed in the slot formed in the core, the expansion sheet has a first surface and a second surface and includes: a first surface-side portion; and a second surface-side portion that is closer to the second surface than the first surface-side portion, wherein an amount of volume increase, caused by heating, of the first surface-side portion is higher than an amount of volume increase, caused by the heating, of the second surface-side portion.

Abstract: A wedge for use in a generator rotor has a wedge body with a central radially top surface of the wedge body, formed with a plurality of blades. At least some of the plurality of blades extend at an angle such that a plane defined through the blades will be non-perpendicular to a rotational axis of the rotor that will receive the wedge.

Abstract: A heavy-duty stator core and coil assembly that can accommodate severe input voltage spiking and harmonics may include a coat of varnish applied to the stator core and coil assembly by steps of dipping the stator core and coil assembly end-first along a longitudinal axis into a first tank of liquid epoxy resin having a relatively low viscosity, baking the coating, inverting the stator core and coil assembly and applying a second coat of varnish in the same manner, then dipping the core and coil assembly into a second tank having a liquid epoxy resin of a relatively high viscosity, then baking the second coat.

Abstract: A refrigerant compressor has a compressor housing in which a cylinder housing and an electric motor are fastened to one another. The electric motor includes a stator provided with a stator bore, the coil core of which is provided with receiving grooves for accommodating a stator winding having any given number of windings, coil groups, and poles. The coil core is preferably composed of interconnected stator segments and the stator winding in the region of the end faces of the coil core has winding heads which are each situated outside the receiving grooves. The winding heads of the stator winding are pressed against an insulating element which is situated between the coil core and the winding heads and which has an arbitrary number of projecting additional insulating sections in a peripheral edge region opposite the stator bore.

Abstract: An electric machine includes a core with a plurality of slots. A plurality of conductors are positioned in each of the plurality slots, with each slot including an equal number of conductors. At least one slot liner is also positioned in each of the plurality of slots. Each slot liner provides at least one slot liner channel in the associated slot, and each of the plurality of conductors extend through one of the slot liner channels. Differing numbers of slot liner channels are provided in the plurality of slots. Accordingly, all slots have the same number of conductors positioned therein, but all slots do not have the same number of slot liner channels.

Abstract: An insulation assembly is provided that includes a generally annularly-shaped main body and at least two spaced-apart fingers extending radially inwards from the main body. The spaced-apart fingers define a gap between the fingers. A slot liner may be inserted within the gap. The main body may include a plurality of circumferentially distributed segments. Each one of the plurality of segments may be operatively connected to another of the plurality of segments to form the continuous main body. The slot liner may be formed as a single extruded piece defining a plurality of cavities. A plurality of conductors (extendable from the stator assembly) may be axially inserted within a respective one of the plurality of cavities. The insulation assembly electrically isolates the conductors in the electric motor from the stator stack and from other conductors.

Abstract: The present invention relates to a stator core including at least two or more stator core-continuous bodies each formed by coupling at least two or more unit cores to each other, each unit core consisting of a tooth portion having a coupling slot and a coupling projection formed along both ends thereof and connected to adjacent unit core by means of a connection portion formed at each of both end portions of the tooth portion, wherein the at least two or more stator core-continuous bodies are fitting-connected to each other by means of the coupling slots formed at one side ends thereof and the coupling projections formed at the other side ends thereof to form the stator core having a round shape.

Abstract: An electric motor may include an outer rotor and an inner rotor, with a stator, which carries the excitation coils, formed as a hollow cylinder and engaging in the pot-shaped outer rotor and being connected to the housing or to a part of the electric motor fixedly connected to the housing, and where the electric motor may further include a water cooling and an air cooling system.

Abstract: A system for completing an electrical circuit includes first and second base contacts electrically isolated from each other, each having a magnetic portion secured thereto, each magnetic portion having an opposite polarity, and each of said base contacts electrically connected to an electrical lead for transmitting an electrical signal through said base contacts. The system also includes first and second mating contacts electrically isolated from each other, each having a magnetic portion of opposite polarity secured thereto.

Abstract: The invention includes a retention system and method for stator magnet wires. In embodiments, the retention system includes a packing ring that can swell to a larger size following installation. In embodiments, the lubricant used in the motor causes the packing ring to swell. When the packing ring swells, it exerts pressure against the end turns of the stator magnet wires, and can contour to the shape of the wires so that there are no pressure points on the wires. A rigid support ring can be positioned concentric with the packing ring so that the packing ring does not swell toward the axis of the motor housing.

Abstract: Systems and methods for the construction of electric motors, where expandable material is inserted into the slots in which magnet wires are positioned and expanded in the slots to mechanically restrain the wires. One embodiment comprises a downhole electric motor such as might be used in an electric submersible pump (ESP) system. The motor has a stator with multiple slots in which magnet wires are positioned. A slot liner is positioned in each slot and an expansion pad is positioned in each slot between the slot liner and the slot wall nearest the bore of the stator. The wires are positioned inside the slot liner. When the motor is almost completely assembled, it is filled with oil. Some of the oil is absorbed by the expansion pads, which then expand to fill the unoccupied volume in the slots, thereby restraining the movement of the wires within the slots.

Abstract: A motor stator includes a body member having multiple wire-winding grooves that is formed of a stack of silicon steel plates and defines axially a middle section and two end sections, the wire-dinging grooves in the end sections being greater than in the middle section, two wire racks each having foot tubes respectively inserted into the end sections of the body member in the wire-winding grooves beyond the middle section, the foot tubes having an inner diameter not less than the part of the wire-winding grooves corresponding to the middle section, and insulation sheets having a length greater than the height of the middle section of the body member and being respectively set in the wire-winding grooves and the corresponding foot tubes.

Abstract: A rotary electric machine comprises a rotor rotatable within a stator assembly, the stator assembly comprising a stator body defining a plurality of stator slots accommodating electrical conductors, a slot liner being provided within each slot to provide electrical insulation between the stator body and the electrical conductors, wherein each slot liner protrudes from an end of the stator slot and carries an armor element to protect the slot liner and associated conductors from erosion while permitting efficient cooling.

Abstract: A support system is provided for a dynamoelectric machine having a stator and stator bars connected to a connection ring assembly. The support system includes at least one stator bar support bracket and one or more support rings connected to the stator bars. A connection ring support bracket supports the connection ring assembly. A mount is connected to the connection ring support bracket. The mount permits axial movement of the stator bars, the stator bar support bracket, the support rings, and the connection ring assembly due to thermal expansion experienced during operation of the dynamoelectric machine.

Abstract: The invention relates to an electric motor for high-temperature applications. The electric motor comprises a rotor and a stator with a hollow-cylindrical, ironless stator winding of stoved-enamel wire. Furthermore, a soft-magnetic return is provided which encloses the stator winding.

Abstract: An insulator for a stator assembly includes at least a first insulator adapted to be mounted to the stator core and structured to insulate the stator core from the coils. The at least one insulator includes structure to perform at least one additional function. For example, the structure may include a support member to support and/or locate the PCBA on the stator core, a wire guide to guide cross-over wires that form a connection between coils, and/or positioning structure to precisely position the PCBA with respect to the coils.

Abstract: A rotating electric machine comprises a stator and a rotor. In the rotor, numerous slots are formed along a circumferential direction. In the each of slots, a first stator coil and a second stator coil are inserted and insulated by an insulator inserted before inserting the coils in the slots. The insulator encircles the first and second stator coils so as to be formed into an S shape. The center portion thereof extends over the area between the first and second stator coils. One end of the insulator is held between one surface of the center portion of the insulator and the first stator coil. Other end of the insulator is held between another surface of the center portion of the insulator and the second stator coil.

Abstract: Provided are an insulator including a flange to prevent a coil from coming out, and a method for manufacturing a stator including an insulator and a coil, the insulator being configured not to let the flange interfere with the coil when the coil is fitted to the insulator and not to generate any damage at the insulator during the fitting. An insulator 3 is to be fitted to a tooth 51 of a stator 5, on an outer periphery of which a coil 4 is formed, and the insulator 3 includes: a first split body 1 to be disposed on a root side of the tooth 51 when the insulator 3 is fitted to the tooth 51, and a second split body 2 to be disposed on a distal end side of the tooth and to be fitted to the first split body 1, thus forming the insulator 3. The second split body 2 includes a flange 21 at an end face on the distal end side of the tooth so as to prevent the coil 4 from coming out of the insulator.

Abstract: An armature includes a core-back, insulator members, coils and insulating sheets. The insulating sheets are arranged between the coils adjacent to one another. Each of the insulator members includes a flange-shaped inner wall portion positioned radially inwards of each of the insulating sheets. The inner wall portions of the insulator members adjacent to each other include opposing portions opposed to each other in a radially spaced-apart contactless relationship.

Abstract: Electric machines with, and related methods for, improved fluid flow through the electric machines are disclosed. According to some implementations, an electric machine may include a central opening and a plurality of teeth facing inwardly toward the central opening. Slots may be defined between adjacent teeth, and a wedge may be disposed in one or more of the slots, partitioning the slots into a coils portion and an open portion. A gap may be defined between the stator core and the rotor. A fluid flow path defined from the gap and the open portions of the slots provide for improved fluid flow through the electric machine. Wedges disposed in the slots to maintain the coils into a packed state.

Abstract: A stator for a compressor motor that has a structure in which the ends of insulation films inserted into slots of a stator core are supportedly locked to locking protrusions formed on upper and lower insulators for insulating the upper and lower sides of the stator core, thereby allowing the insulation films to be securely supported and providing easy assembling process for the insulation film and the upper and lower insulators.

Abstract: A system for mounting an electrical element and supplying it with a source of electrical power comprises a magnetic circuit base having first and second spaced magnetic elements having an electrical insulator there between. Each of said magnetic elements is electrically connected to a lead of said power source and an element mount comprising first and second electrically conductive mounting portions having an electrical insulator there between. Each of said mounting portions have an electrical lead secured thereto for supplying power to the electrical element, wherein a first mounting portion is electrically connected to the first magnetic element and a second mounting portion is electrically connected to a second magnetic element.

Abstract: A method of forming a flux regulated machine includes winding stator windings into slots in an outer core. The outer core is formed to have a plurality of radially inwardly extending tooth pieces that are circumferentially spaced, and which define the slots. Further, control coils are wound around an inner core. Then, the inner core is inserted within the outer core such that the tooth pieces contact the inner core, and such that the control coils close off the slots at a radially innermost position. A flux regulated permanent magnet machine generally made according to this method is also disclosed.

Abstract: A ripple spring is provided having one or more layers laminated together, where the one or more layers form a symmetrical stack.

Abstract: A method for manufacturing a permanent magnet motor is described herein. The method includes fabricating a stator core to have a skew based on a least common multiple of a number of rotor poles and a number of stator teeth, installing windings about teeth of the skewed stator core to generate a wound stator core, and positioning a permanent magnet rotor with respect to the wound stator core.

Abstract: An electric machine comprises an outer casing (2), a rotor and a stator (3) having at least one polar expansion (5) and at least one winding (8) having an annular shape and placed around the polar expansion (5). The casing (2) has a plurality of protrusions (13) each of which holds, by supporting, a corresponding portion (12) of a stator winding (8) to enable heat exchange between the winding (8) and the protrusion (13). Each portion (12) of the winding (8) is electrically insulated from the respective protrusion (13).

Abstract: A plurality of stator teeth 2 are arranged at a constant interval in a circumferential direction on the inner circumferential face side or the outer circumferential face side of a ring-shaped stator core 1 that is made of a plurality of steel plates. The winding wire 5 is wound about the stator teeth. An insulator 4 that electrically insulates the stator core and the winding wire is provided therebetween. A gap 6 is formed between the winding wire and the insulator. Accordingly, a desired distance can be secured between the stator teeth and the winding wire regardless of the thickness of the insulator, and, thus, the influence of leakage magnetic fluxes that acts on the winding wire can be reduced. Accordingly, the influence of leakage magnetic fluxes formed near the stator teeth that acts on the winding wire can be reduced regardless of the thickness of the insulator.

Abstract: An electromechanical apparatus includes: a rotor including a central shaft and permanent magnets disposed around a cylindrical surface along an outer circumference of the central shaft, and a stator including hollow electromagnetic coils disposed around a cylindrical surface along an outer circumference of the permanent magnets and a pipe member having a hollow cylindrical shape and disposed between the permanent magnets and the electromagnetic coils, wherein the pipe member is made of a carbon fiber reinforced plastic, and the carbon fiber reinforced plastic is formed by weaving carbon fiber bundles formed of bundled carbon fibers.

Abstract: A rotor for use in an electrical motor which includes an anti-expansion ring centrally mounted on the rotor to restrict the extent rotor elements mounted on a rotatable shaft may expand outward due to centrifugal forces generated when the motor is operated. Such motors are suited for use in high rotational speed environments such as electrically controlled turbochargers.

Abstract: A ripple spring is provided having one or more layers laminated together, where the one or more layers form a symmetrical stack.

Abstract: A ripple spring is provided having one or more conductive layers, and one or more non-conductive layers. The conductive layers and the non-conductive layers are laminated together to form a symmetrical stack of layers. A method is also provided for monitoring the ripple spring. The method includes the steps of providing a ripple spring that holds a winding in place, where the ripple spring is positioned at least partially within a stator slot defined within an electromechanical device. Providing a conductive layer disposed within the ripple spring, and generating signals from the conductive layer, the signals corresponding to at least one aspect of the ripple spring. An analyzing step analyses the signals to determine the at least one aspect of the ripple spring, wherein the at least one aspect facilitates an identification of faults in the ripple spring.

Abstract: A rotating electrical machine includes: a stator that has a stator core and a stator coil; and a rotor disposed rotatably on an inner circumferential side of the stator core. The stator core includes a plurality of slots opening on the inner circumferential side and the slots are each formed as an open slot with a width of an inner circumferential-side opening thereof ranging along a circumferential direction set substantially equal to or greater than a width of a bottom side measured along the circumferential direction. The stator further includes a slot insulator disposed between inner wall of each of the slots at the stator core and the stator coil and a holding member constituted with a nonmagnetic material and inserted in each of the slots at the stator core so as to hold the slot insulator between two side surfaces present along the circumferential direction at the slot. The stator is formed by winding the stator coil through the plurality of slots.

Abstract: A coil fixing member of a rotating electrical machine, wherein the rotating electrical machine includes a ring-shaped stator core, a slot formed at inner peripheral section of the stator core, a coil arranged in the slot, and wall sections defining opening on an inner periphery of the slot in a radial direction of the stator core, and wherein the coil fixing member is inserted into the slot, the coil fixing member comprising: a pressing section that presses the coil outward in the radial direction of the stator core; and engaging sections that are adjacent to both end sections of the pressing section in a peripheral direction of the stator core, that extend from the both end sections to an inward side in the radial direction of the stator core, and that include leading end sections respectively engaged with the wall sections.

Abstract: An armature includes an insulator component with a wiring member arranged in a wiring fixing groove positioned outside of an outer wall portion of the insulator component. When a lead wire is wound around the insulator component, a winding start portion and a winding end portion of the lead wire are arranged to intersect with each other in a radial direction to define an intersection portion. The winding start portion is pressed by the winding end portion toward the outer wall portion. A lead wire escape portion spaced from a radially outer end portion of a coil is defined in the outer wall portion. This contributes to preventing the outer wall portion from being deformed by being pressed by the lead wire at the intersection portion, thereby preventing difficulty in arranging the wiring member on the insulator component.

Abstract: Systems and methods for constructing electric motors in which a stator core includes inner and outer portions that enable slots for magnet windings to be open during construction and closed in the completed motor. One embodiment comprises a method in which an inner stator core having a plurality of slots is formed by stacking a set of laminations. The slots are open radially outward from an axis of the inner stator core and which are configured to accommodate turns of magnet wire. After the magnet wire is positioned in the open slots, an outer stator core comprising stacked laminations is positioned around the inner stator core, enclosing the slots. The inner and outer stator cores are then positioned within a housing and assembled into a downhole motor.

Abstract: A rotary electric machine includes a plurality of lead end holding grooves defined in insulators at an outer circumferential surface of a stator core, for guiding respective ends of coil leads therein. The lead end holding grooves are defined by ledges of the insulators. The ledges have respective lands which are convex in widthwise directions of the lead end holding groove.

Abstract: A rotating electric machine includes an annular stator including a coil formed by winding a part of a coil wire around a stator core, and the coil wire includes the coil wound around stator teeth, a terminal portion drawn out from one end portion of the coil over a yoke portion, and a wiring drawn out from the other end portion of the coil over the yoke portion and connected to a terminal portion of another coil wire including another coil provided at a distance from the coil in a circumferential direction of the stator.

Abstract: A rotor for a rotating electric machine, having at least a pair of cavities with a bottom wall from which a first lateral wall and a second lateral wall extend transversally, wherein each cavity is suitable for receiving therein a respective lateral portion of a winding of the rotor through an insertion opening that extends facing the bottom wall from the first lateral wall to the second lateral wall. The rotor includes blocking means suitable for blocking the lateral portions of the winding in the respective pair of cavities by operatively coupling with coupling means defined in the rotor.

Abstract: Solutions for reducing key bar rattle in dynamoelectric machines are disclosed. In one embodiment an apparatus includes: a plurality of key bars operably coupling a stator core to a stator wrapper in which the stator core is at least partially contained; a cable surrounding the plurality of key bars; and at least one anchor device connecting a portion of the cable to the stator wrapper to produce a compressive load on at least one of the plurality of key bars by tightening the cable around the plurality of key bars.

Abstract: A stator includes an elongate core defining an inner volume to receive a rotor of an electric machine. The core includes a yoke and an array of teeth extending from the yoke toward the inner volume. The array of teeth defines slots between each pair of adjacent teeth in the array. Each slot includes a first slot region adapted to hold at least a portion of a conductive winding and a second slot region adapted to hold at least a portion of a conductive winding. The first slot region is defined by two non-parallel opposing slot side portions, and the second slot region is defined by two parallel opposing slot side portions.

Abstract: A high-speed sleeveless rotor for an electric machine is provided. The rotor includes a shaft rotatable about a longitudinal axis, and a rotor core circumscribing at least a portion of the shaft wherein the rotor core includes an axially oriented slot. The slot includes a radially outer slot opening, a radially inner slot floor, and a slot sidewall extending therebetween. The slot floor includes a topstick attachment member extending radially outward from the slot floor and configured to engage a topstick positioned in the slot opening and the slot sidewall includes a shoulder configured to engage the topstick, preventing radially outward movement of the topstick.

Abstract: A stator includes a hollow cylindrical stator core having stator teeth and slots. The stator teeth each extend radially inward and are circumferentially spaced from one another. Each of the slots is formed between one circumferentially-facing pair of the stator teeth and opens at the radially inner periphery of the stator core. Each of the stator teeth has a distal end portion that includes a slit, a base part and an oblique part. The slit is formed in a distal end surface of the stator tooth and extends axially. The base part and the oblique part are formed respectively on opposite circumferential sides of the slit. The base part extends radially inward to have a distal end surface that makes up an inner-diameter surface of the stator core. The oblique part is bent toward an adjacent slot so as to extend obliquely with respect to the base part.

Abstract: There are provided a tubular stator core having a plurality of tooth portions which protrude radially inwards and slots which are defined between the respective tooth portions and coils which are disposed on circumferences of the tooth portions. An insulator is attached to the stator core from an axial direction thereof for isolating the coils from the stator core. A radius of curvature of a corner portion of the insulator around which the coil is wound decreases continuously as the tooth portion extends from a root portion to a distal portion thereof.