Abstract: A method for manufacturing a motor core includes a step of manufacturing a motor core by performing melt-cutting on an electrical steel sheet using heat input from a surface, the electrical steel sheet having an average thermal conductivity in depth positions from the surface to one-third depth of a sheet thickness lower than a thermal conductivity in a middle position in a sheet thickness direction by 30% or greater.

Abstract: A coolant supply system for a drive device of an electrically operated vehicle axle with an electric machine which has a cylindrical stator housing, in which there is a winding head space axially on both sides of a rotor/stator arrangement, at the bottom of which coolant collects. The two winding head spaces are fluidly connected to one another via a coolant sump, and the stator housing height and the coolant sump height in the electric machine vertical direction add up to a total height. In order to reduce the total height, the coolant sump is offset by a transverse offset from a rotor axis vertical plane. In this way, the stator housing height and the coolant sump height can at least partially overlap in the vertical direction of the electric machine by an overlap amount.

Abstract: An electric machine includes a stator rotatably supporting a rotor, the rotor includes a stacked rotor laminations forming a rotor core with cavities having magnets arranged in the cavities through at least two adjacent rotor laminations and parallel to a rotor central axis, each lamination including an outer edge having grooves or scallops arranged asymmetrically about the circumference to reduce torque ripple. At least one groove or scallop may be arranged along a q-axis and at least one groove or scallop may be arranged between a q-axis and a d-axis of the rotor core. The laminations may be substantially identical with a first group of laminations flipped or rotated about a diametric axis relative to a second group of laminations. An electrified vehicle includes an electric machine powered by a traction battery, the electric machine having a rotor core with stacked rotor laminations having a scalloped outer edge.

Abstract: The present disclosure provides a potting method of a coreless motor, a potting tooling thereof, and a coreless motor. Wherein the potting method includes the steps of providing a stator assembly and a housing, wherein the housing is sleeved on an outer wall of the stator assembly; providing a potting tooling, wherein the potting tooling includes a first potting fixture and a second potting fixture; inserting the first potting fixture into one end of the housing in an axial direction and inserting the second potting fixture into the other end of the housing in an axial direction to form a potting space; injecting glue into the potting space to form an encapsulation layer to encapsulate the stator assembly on the inner wall of the housing. With the potting method of the present disclosure, so as to improve the stability of the stator assembly in the potting process.

Abstract: To prevent varnish from adhering to an adhesion prohibited area while satisfying required performance for varnish. A method for manufacturing a stator of a rotating electric machine in which a coil is wound around a stator core, the method includes: a first varnish process of forming a first varnish portion by dropping varnish at a coil disposed on an outermost circumference or an innermost circumference of a coil end portion where the coil protrudes from the stator core and positioned close to the stator core; and a second varnish process of forming a second varnish portion to provide a non-existence region where varnish is not applied between the first varnish portion and the second varnish portion by dropping varnish at a position farther from the stator core than a position in the first varnish process.

Abstract: An example electrostatic machine includes a rotor plate and an adjacent stator plate, where the rotor plate or the stator plate includes a coupled bearing. The other one of the rotor plate or the adjacent stator plate includes a race radially aligned with the coupled bearing. The coupled bearing has a width with a first contact point on the first one of the rotor plate or stator plate and a second contact point on the race on the other one of the rotor plate or stator plate, where the coupled bearing is sized to maintain a minimum separation distance between the rotor plate and the stator plate.

Abstract: An insulator according to an embodiment includes a teeth cover portion and a crossover-wire guide portion. The crossover-wire guide portion includes a plurality of guide walls, a drawing groove, a drawing path, and a crossover-wire support portion. The plurality of the guide walls separate the crossover-wire portions of the coils and are capable of guiding the crossover-wire portions in the core circumferential direction. The drawing groove penetrates through all of the plurality of the guide walls in the core radial direction. The drawing path is disposed at a position away from the drawing groove in the core circumferential direction. The crossover-wire support portion changes a direction of the crossover-wire portion of the coil drawn out from the drawing groove, to be directed to the drawing path, and supports the crossover-wire portion.

Abstract: A stator may include a stator core and a coil. The stator core may include: a first portion; a second portion; and a first intermediate portion interposed between the first portion and the second portion in the axial direction. A first segment conductor and a second segment conductor may overly each other in a circumferential direction of the stator core hr a slot within an area of the first intermediate portion. A first side surface may include a first protrusion provided by the first intermediate portion protruding with respect to the first portion and the second portion. The first segment conductor and the second segment conductor may be held between the first protrusion and a second side surface such that the first, segment conductor and the second segment conductor are connected with each other.

Abstract: A laminated core (10) is provided for a stator or rotor of an electric machine. The laminated core (10) is formed from multiple laminations (12) that are stacked one on top of another in an axial direction (14) to form a lamination stack (16). A through-opening (18) is formed in the lamination stack (16) and extends parallel to the axial direction (14). A tie rod (20) of plastic is introduced, in particular injection molded, in the through-opening (18) to assemble the laminated core (10).

Abstract: A rotor for an electric motor includes a shaft having a central portion supporting a laminated core of an electrical sheet material. The central portion is also composed of an electrical sheet material. The ends of the rotor shaft may be formed from a different material than the material of the central portion, and may be connected to the central portion by a force-fitting interference fit and/or a knurled interference fit. An electric motor having such a rotor and a method for producing a such a rotor are provided.

Abstract: In a method for producing a cooling structure over a surface of a housing of a dynamo-electric rotational machine, at least one material is applied in layers by an additive manufacturing method to the surface of the housing, omitting at least one predefined region. As a result of the application of material, at least two elevations are formed, with a cooling channel being formed between the two elevations.

Abstract: A method of manufacturing an armature includes: a step of preparing first segment conductors in which a plurality of end portions, or an end portion and a power terminal member, are electrically connected to each other; a step of disposing leg portions of the first segment conductors and leg portions of second segment conductors in an armature core; and a step of joining the leg portions of the first segment conductors and the leg portions of the second segment conductors to each other.

Abstract: A bridge part of a first coil segment includes a first bridge section extending in a circumferential direction and including a first bending part reducing an inclination angle, and a second bridge section extending in the circumferential direction toward the first linear part and including a second bending part reducing an inclination angle. A bridge part of a second coil segment includes a third bridge section extending in the circumferential direction toward a second linear part and including a third bending part reducing an inclination angle, and a fourth bridge section extending in the circumferential direction toward the first linear part and including a fourth bending part reducing an inclination angle.

Abstract: A method of forming a winding for an electric machine includes first bending a wire between a plurality of forming structures such that the wire is bent into a zigzag shape. Thereafter, the method includes cutting the wire at a plurality of cut locations along the zigzag shape to form a plurality of segmented conductors, each of the segmented conductors including an end turn and two legs.

Abstract: A stator includes a stator core having a plurality of split cores arranged in an annular shape. Each of the split cores includes a yoke portion and a tooth portion protruding from the yoke portion in a radial direction of the stator core. The yoke portions of adjoining split cores are connected to each other at joint surfaces of adjoining split cores. The joint surfaces are provided with a fitting portion that extends along an axial direction of the stator core from an upper end surface to a lower end surface of the stator core. The fitting portion is provided with a crimped portion.

Abstract: To enhance process reliability when processing wire ends during the course of a production of a machine element of an electric machine, a positioning and clamping device configured to position and clamp one or several wire ends for further processing during the course of the production of the machine element of the electric machine, comprises a capturing device for capturing and positioning the at least one wire end, wherein the capturing device has at least one oblique guide for the relative positioning of the at least one wire end. Furthermore, a corresponding clamping and positioning method is described.

Abstract: A generator rotor assembly (42) comprises a cylindrical ring structure (46) defining a central hollow portion and arranged to rotate around a rotational axis. The cylindrical ring structure (46) comprises a plurality of permanent magnet packages (48) arranged coaxially around the rotational axis, the permanent magnet packages (48) comprising a plurality of coaxially stacked ring-shaped segmented layers (80), a plurality of tie rod holes (86) and a plurality of tie rods (54). The coaxially stacked ring-shaped segmented layers (80) comprise a plurality of contiguous segment sheets (82) arranged around the rotational axis to form the ring-shaped layer, the stacked layers (80) being staggered such that segment breaks between two contiguous segment sheets (82) in one of the layers are angularly offset with respect to segment breaks between two contiguous segment sheets (82) in an adjacent layer.

Abstract: A stamping progressive die for a stator and rotor core of a motor using adhesive dispensing lamination and an adhesive dispensing process. The adhesive dispensing lamination device comprises a stamping station, an adhesive dispensing station for a first adhesive component, an adhesive dispensing station for a second adhesive component and a blanking station which are arranged on the stamping progressive die for the core of the stator and rotor of the motor, wherein an automatic stacking mechanism for core stamping sheets is arranged below the blanking station; one of the adhesive dispensing station for the first adhesive component and the adhesive dispensing station for the second adhesive component is located at an upper position of a material strip, and the other adhesive dispensing station is located at a lower position of the material strip.

Abstract: A coil mounting device includes a stator coil, a coil winding jig that has an outer diameter smaller than an inner diameter of the stator core and winds therearound a belt-shaped coil in an annular shape, a stator core fixing jig that fixes the stator core at a predetermined position and in a predetermined posture, and a coil expansion mechanism that expands the belt-shaped coil. The coil expansion mechanism includes a holder that holds the coil winding jig inside the stator core in a state where the inter-comb-teeth grooves are matched in phase with the slots, and a coil expander that expands the belt-shaped coil by pressing a portion nearer to a side end than the straight portions of the belt-shaped coil wound around the coil winding jig held by the holder so as to expand the portion, thereby inserting the straight portions into the slots.

Abstract: An object is to assemble a housing to a mating bracket with high accuracy and to improve the reliability of a rotating electrical machine. A housing of a rotating electrical machine according to the present invention is a housing of a rotating electrical machine that accommodates a stator of the rotating electrical machine and is supported by a support member, the housing including: a first tab that forms a first through-hole through which a first screw passes; and a second tab that forms a second through-hole through which a second screw passes and forms a fitting portion that fits with a position adjustment member, wherein the first tab is formed such that a first facing surface facing the support member of the first tab is farther from the support member than a second facing surface facing the support member of the second tab.

Abstract: This rotor manufacturing method includes the steps of: pressing a rotor core in a central axis direction by using a core pressing member; and fixing a shaft to the rotor core by performing, with the rotor core pressed, hydroforming that involves pressure-welding the shaft to an inner peripheral surface of a shaft insertion hole.

Abstract: A method and an apparatus are provided for manufacturing a stator with a plurality of hairpin conductors. For inserting the hairpin conductors (15, 15) into the slots (11) of a stator core (12) a stator core template (22) is provided. Hairpin conductors (15) are axially inserted into slots (21) of the stator core template (22) such that the hairpin conductor (15) is arranged at a first position (P1) within said slot (21). The hairpin conductor (15) is then moved within said slot (21) to a different position (P2). A complete nest (20) of hairpin conductors (15) formed within the stator core template (22) is then transferred to the stator core (12).

Abstract: The present disclosure relates to methods and tools for mounting and/or removing active parts of a stator of an electrical machine, e.g. a generator. The present disclosure also relates to rotors, stators and generators. A method comprises removing one or more active rotor parts of a rotor of an electrical machine when the rotor is in a removal starting position, arranging a replacement tool in a gap left by the removed active rotor parts, rotating the rotor to an alignment position such that the replacement tool is radially aligned with an active stator part to be removed, picking the active stator part to be removed with the replacement tool, rotating the rotor to an extraction position, and removing the active stator part from the rotor.

Abstract: Disclosed herein are a production apparatus of a motor laminated core and a method for producing the same, the production apparatus comprises an upper die assembly, a lower die assembly and an adhesive spraying device, the adhesive spraying device comprises an adhesive spraying plate, a first die plate and a second die plate successively from top to bottom, and channels are disposed between the plates, and respective channels communicate with first adhesive spraying openings and second adhesive spraying openings so as to coat an adhesive on a portion of a metal strip used for forming an core sheet, and after the core sheet is formed, a plurality of core sheets are cured and bonded at normal temperature in the production apparatus with the aid of a hydraulic cylinder so as to form a motor laminated core.

Abstract: The present disclosure relates to a coil assembly including: a plurality of unit flat coils disposed and spaced apart from one another in a circumferential direction; and a molding body made by dual injection molding and configured to partially surround the unit flat coils, thereby simplifying a structure of the coil assembly and a process of manufacturing the coil assembly.

Abstract: A method can be used for inserting a hairpin in a stator core. The method includes unwinding a coil spiral-wound on an uncoiler, forming a decoated portion by decoating a predetermined portion on the coil, bending the coil in multiple stages to two-dimensionally form a leg portion and a head portion of a hairpin, cutting the coil formed with the leg portion and the head portion by a predetermined length, and moving the hairpin to be inserted into a stator core while three-dimensionally forming the head portion.

Abstract: An electric machine has a stator and a rotor arranged on a hollow shaft and able to turn relative to the stator about an axis of rotation, wherein the hollow shaft comprises, in a shaft casing, at least one shaft exit opening for coolant supplied to a shaft interior space of the hollow shaft. A cover element is arranged next to the rotor on the hollow shaft, in which is formed a fluid duct comprising a fluid duct inlet and a fluid duct outlet, wherein the fluid duct inlet overlaps with the shaft exit opening and the fluid duct outlet overlaps with a coolant duct inlet of a coolant duct reaching through the rotor in the axial direction relative to the axis of rotation, having a coolant duct outlet on its side opposite the coolant duct inlet, through which the coolant emerges from the rotor.

Abstract: A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.

Abstract: Installation workability of a motor system 1 is improved and occurrence of a communication error between an inverter 50 and an electric portion 83 of an electric oil pump 80 due to entry of noise can be suppressed. A motor portion 2 and the inverter 50 are adjacent to each other in a motor axial direction, at an adjacent portion, a wall of a casing of the inverter 50 on an arrow A direction side and a wall of a casing of the motor portion 2 on an arrow B direction side are shared as a barrier 3b made of the same member, and in a position that a pump portion 81 side of the electric oil pump 80 including a pump portion 81, an internal motor 82, and an electric portion 83 arranged in the motor axial direction faces the arrow A direction side, the electric oil pump 80 is disposed in the casing of the motor portion 2 and the inverter 50.

Abstract: A coil insertion device includes: a pair of delivery jigs respectively formed with slits into which a pair of side portions of a coil that are parallel with each other can be inserted; and a side portion inserting mechanism configured to push out the side portions inserted into the slits from the slits to insert the side portions into slots of a stator core, the slots facing the slits, the side portion inserting mechanism has: pushing blocks inserted into the slits; and a pushing block moving mechanism configured to move the pushing blocks in a depth direction of the slits.

Abstract: A method is presented for producing an arrangement of coil elements for a plug-in coil of an electric machine. The method includes providing a workpiece carrier and producing an arrangement of rod-shaped coil elements for a plug-in coil of an electric machine on the workpiece carrier, wherein the following is respectively provided for the rod-shaped coil elements: accommodating and holding the coil elements by means of a displacement device; supplying the coil element onto the workpiece carrier by means of the displacement device into an assigned proximal position on the workpiece carrier, wherein the coil elements are hereby displaced form a distal position into the assigned proximal position with respect to the workpiece carrier; and transferring the coil elements in the proximal position on the workpiece carrier from the displacement device by a gripping device, which is formed on the workpiece carrier.

Abstract: Various embodiments include a tool for fitting a stator into a housing comprising: a housing mounting; a tool holder; and a stator gripper. The housing mounting includes a positioning device for holding the housing. The tool holder defines a tool holder volume and has a receiving opening. The stator gripper is arranged in the tool holder and moves between a first position and a second position. The stator gripper comprises a gripper head for holding the stator, in the first position, the gripper head is arranged in the tool holder volume and, in the second position, the gripper head is guided, at least in one section, through the receiving opening. The housing mounting and/or the tool holder move toward one another or away from one another. The housing mounting or the tool holder or the stator gripper includes a pressure medium feed opening.

Abstract: A method of manufacturing a rotor is disclosed. A magnet is inserted into a magnet hole of a rotor core. The method comprises inserting an insertion member into the magnet hole having a first opening and a second opening. The method comprises fixing the magnet to the insertion member extending out from the second opening. The method comprises inserting the magnet, which is fixed to the insertion member, into the magnet hole from the second opening by pulling the insertion member extending out from the first opening in a direction separating away from the rotor core. The method comprises cutting the insertion member extending out from the first opening.

Abstract: A transmission (G) for a motor vehicle includes a housing (GG), a shaft (W, GW2, DS1, DS2) mounted in the housing (GG) and protruding from the housing (GG), a radial shaft seal (DR) having a sealing lip for sealing an oil space (NR) within the housing (GG) with respect to an exterior, a shaft grounding device (E) arranged on an exterior side of the radial shaft seal (DR) for establishing an electrically conductive sliding contact (SK) between the shaft (W, GW2, DS1, DS2) and the housing (GG), and a sleeve-shaped covering element (C) fixedly connected to the shaft (W, GW2, DS1, DS2) for protecting the sliding contact (SK) against environmental influences. The shaft grounding device (E) is fixedly connected to the housing (GG). The covering element (C), together with the grounding device (E), forms a labyrinth sealing. An electric axle drive (EA) may include the transmission (G).

Abstract: There are provided a core unit manufacturing apparatus and a core unit manufacturing method including: a molding device that fills a resin into a space portion in a core body; a resin transfer unit that transfers a resin material to the molding device to supply the resin material thereto; and a core transfer unit that carries the core body in and out of a part between a pair of dies of the molding device. The resin transfer unit and the core transfer unit are arranged such that: the resin transfer unit supplies the resin to the molding device from one side position of side surfaces of the molding device; and the core transfer unit carries the core body in and out of the molding device from the other side position of the side surfaces of the molding device, the other side position being different from one side position.

Abstract: According to one embodiment, a sensor includes a first detection element, and a processing part. The first detection element includes a base body, a first supporter fixed to the base body, a first movable part, first and second counter conductive parts. The first movable part is supported by the first supporter and separated from the base body. The first movable part includes a first movable base part supported by the first supporter, a second movable base part connected with the first movable base part, a first movable beam including a first beam, and a second movable beam including a second beam. The first beam includes a first end portion and a first other end portion. The second beam includes a second end portion and a second other end portion. The first counter conductive part faces the first movable beam. The second counter conductive part faces the second movable beam.

Abstract: A liquid-cooled rotating electric machine may include an inner stator and outer rotor configured to rotate about the stator. A hub may be disposed within the inner stator and a heat exchanger may be disposed in the hub. The heat exchanger may be configured to enable the flow a liquid through it to dissipate heat from the stator.

Abstract: Embodiments of the currently claimed disclosure are directed to methods for inserting an undulated coil assembly in the slots of a hollow core of a dynamoelectric machine. In some embodiments, the method can include positioning at least a first coil portion of the coil assembly around a support member, aligning a guide device with respect to end faces and the slots of the core, feeding the first coil portion from the drum support member along the guide device to insert adjacent superimposed linear portions (LI) of the coil assembly in the slots, engaging the superimposed linear portions (LI) along at least one guide surface during the feeding, and relatively moving the core with respect to the guide assembly device to position the slots for receiving the superimposed linear portions (LI).

Abstract: To prevent the axial compressive force that acts on the rotor core from becoming unnecessarily large and to enable a high-quality magnet embedded core to be manufactured efficiently, a retaining jig (10) for a rotor core (2) including a magnet insertion hole (4) forming a through hole defining openings on end surfaces in an axial direction includes: a first plate (12) configured to contact against one of the end surfaces of the rotor core (2) and including a gate (20) configured to communicate with the corresponding opening of the magnet insertion hole (4); a second plate (14) configured to oppose another of the end surfaces of the rotor core (2); a closure member (26) coupled to the second plate (14) via a compression spring member (28) and configured to be capable of closing the opening of the magnet insertion hole (4) on the other of the end surfaces; and a coupling member (30) that couples the first plate (12) and the second plate (14) to each other such that the closure member (26) closes the opening and

Abstract: A reluctance motor has salient teeth on both the stator and the rotor. The reluctance motor includes electrical coils that are usable to generate magnetic flux to drive rotation of the rotor. Concentrated coil windings are wound around each stator tooth. The electrical coils are arranged across all the stator teeth of the reluctance motor to enable the reluctance motor to be driven by alternating current. The electrical coils are arranged so that, when excited with alternating current, the number of magnetic half-poles is equal to the number of teeth on the rotor. The reluctance machine can operate using an inverter instead of an asymmetric bridge.

Abstract: A stator for use in a motor includes a stator core, an insulator, a coil, and a terminal pin. The stator core includes a core back having an annular shape and teeth. The insulator covers at least a portion of the stator core. The coil is defined by a conductive wire wound around the teeth via the insulator. The terminal pin extends axially upward from an upper surface of the insulator and is connected to an end portion of the conductive wire. The insulator includes an annular portion, first protruding portions, and second protruding portions. The annular portion covers at least a portion of the core back and is centered on the central axis. The plurality of first protruding portions cover at least a portion of each of the teeth and protrude radially outward from the annular portion.

Abstract: A metal laminate includes a lamination of a first metal plate and a second metal plate. The first metal plate includes a caulking that exhibits a mountain shape protruding from a back surface side and recessed on a front surface side, and the second metal plate includes an accommodating portion configured to accommodate the caulking such that the caulking is fitted to the accommodating portion. The caulking includes a recessed portion provided on an inner concave surface of the caulking and recessed toward the back surface side of the first metal plate, and an abutting portion provided on an outer convex surface of the caulking and abutted against an inner surface of the accommodating portion at a position corresponding to the recessed portion. The abutting portion expands laterally from the outer convex surface toward the inner surface of the accommodating portion.

Abstract: A stator for an electric machine includes a laminated core having grooves evenly distributed in the circumferential direction around a longitudinal axis and continuously extending in a longitudinal direction of the core. Each groove receives at least two electric conductors having a substantially rectangular cross-section that are insulated against each other and against the core by at least one insulation layer coating in the radial direction and the circumferential direction as well as in the longitudinal direction at least over a stator height of the stator. The at least one insulation layer includes a thermoplastic high-performance polymer continuously closed in the circumferential direction and the radial direction and preferably directly extruded on the electric conductor. The insulation layer, at least in the circumferential direction, has a total circumferential layer thickness at least 1.5 to 3, preferably 1.8 to 2.2 times a total radial layer thickness of the respective electric conductor.

Abstract: The method for manufacturing an armature includes a step of independently pressing pressing-target segment conductors by a plurality of pressing jigs disposed for each of the pressing-target segment conductors, such that the plurality of pressing jigs are movable relative to each other, at least either one of first segment conductors and second segment conductors serving as the pressing-target segment conductors.

Abstract: A device for producing a stator for an electrical machine includes a segment feed for feeding stator segments, a cylindrical press for pressing the stator segments, a housing feed for feeding stator housings, and a mandrel for receiving the stator segments. The mandrel includes an axial direction, a first region with a first radius, a second region arranged axially below the first region with a second radius that is less than the first radius, and a third region arranged axially below the second region with a third radius that is less than the second radius. In an example embodiment, the mandrel is movable from the segment feed to the cylindrical press, from the cylindrical press to the housing feed, and from the housing feed to the segment feed.

Abstract: This invention entails the use of fractal shapes as cores for electromagnets, and a concurrent shape of a fractal for the windings which surround it. The novelty of this invention lies not only with the shaping, but the advantage of such shaping, which includes producing a smaller form factor electromagnet for the same desired magnetic field strength, when compared to a conventional electromagnet. It will be appreciated that a range of devices including electromagnets, based on such fractal shaping, are additionally novel and include but are not limited to solenoid switches, relays, and other devices in which the fractal electromagnets are used to make a change in state of some device.

Abstract: A rotating electric machine includes a rotor rotatably supported and also including a magnet portion; a stator including a stator winding; and a plunger configured to displace the rotor and the stator relative to one another along an axial direction of the rotating electric machine. The stator includes a slotless structure in which at least one of no magnetic teeth and slot is provided. Thus, an attracting force acting between the magnet portion and the stator is weakened, thereby the rotor and the stator are easily displaceable relative to each other by the plunger.

Abstract: An embodiment relates to a motor comprising: a shaft; a rotor which is coupled to the shaft; a stator which is disposed outside the rotor; a housing which accommodates the rotor and the stator and has an opening formed at one side thereof; and a cover which covers the opening, wherein the cover comprises a cover plate portion; and a side wall which extends axially from the cover plate portion, and at least three grooves are formed in the side wall. Accordingly, the motor according to the embodiment can guarantee the sealing performance while preventing the bearing from being damaged when the rotor is assembled on the inside of the stator.

Abstract: A method of manufacturing an armature includes: a step of preparing first segment conductors in which a plurality of end portions, or an end portion and a power terminal member, are electrically connected to each other; a step of disposing leg portions of the first segment conductors and leg portions of second segment conductors in an armature core; and a step of joining the leg portions of the first segment conductors and the leg portions of the second segment conductors to each other.

Abstract: An insulation sleeve insertion device for inserting insulating sleeves into wiring slots of a flat wire motor stator, comprising a processing panel, a feeder, a conveying mechanism comprising conveyor belts, a positioning mechanism comprising a limit ring and a positioning turntable, a guide mechanism comprising a plurality of second guide rails, a clamping mechanism comprising a drive rod, a positioning plate set, and a drive mechanism comprising a second driver, wherein the clamping mechanism is configured to insert insulating sleeves into wiring slots of the flat wire motor stator through the guide mechanism.