Abstract: Provided is a fluid bearing device with a hub part having high molding precision and dimensional stability and capable of being produced at low cost. An annular gate (14) is formed at a portion of a cavity (15) corresponding to an outer peripheral edge portion of a lower end surface (10c1) of a flange part (10c), and a molten resin (P) is filled into the cavity (15) through the annular gate (14) to form a hub part (10) made of resin. The hub part (10) molded by the injection molding exhibits a radial resin orientation through an entire periphery thereof. Further, an annular gate trace (16) is formed at the outer peripheral edge portion of the lower end surface (10c1) of the flange part (10c) of the hub part (10).

Abstract: A split stator is arranged such that a formed edgewise coil is mounted on a teeth of a split stator core through an insulator, and a resin molded portion is formed excepting long ends of the edgewise coil.

Abstract: An object is to provide a rotor manufacturing method capable of reducing a rotor unbalance amount by controlling a magnet arrangement position in a rotor core and improving work efficiency when fixing a magnet to the rotor core by using resin. A lower surface of a rotor core is arranged in a lower mold. A magnet is arranged in a lower mold. A magnet is contained in each of magnet containing holes formed in the rotor core in such a manner that a predetermined space is assumed between an upper surface of the rotor core and an upper surface of the magnet. An upper mold is arranged on the upper surface of the rotor core. The upper mold and the lower mold apply a pressure to the rotor core and a molten resin is supplied with pressure from an internal diameter side via the predetermined space into the plurality of magnet containing holes from respective cylinder arranged in the upper mold. Thus, the magnets are molded by resin while pressing the magnets toward the outer diameter side of the magnet containing holes.

Abstract: The invention provides a high-quality magnetic iron core by concurrently satisfying requirements for enhancement in strength of a wound iron core, particularly, strength of a wound iron core made up of amorphous foil strips, reduction in manufacturing time, and manufacturing cost. The invention also provides an electromagnetic application product highly efficient and small in size as an application of the magnetic iron core. The magnetic iron core includes an amorphous foil strip being wound to form the magnetic iron core. The magnetic iron core is filled with resin, the resin being disposed in every plural turns of windings of the amorphous foil strip. Preferably, the magnetic iron core is filled with the resin, the resin being disposed by using a spacer in every plural turns of windings of the amorphous foil strip. Preferably, the magnetic iron core is covered with resin which is integrated with and continuous to the resin disposed in every plural turns of windings of the amorphous foil strip.

Abstract: A method for sheathing an armature for electric machines, in which a stack of lamellae that is equipped with grooves for armature windings is mounted on an armature shaft by means of a bore and is provided with at least one groove insulation with the aid of the sheathing process. The sheathing plastic flows through ducts that extend along the bore of the stack and the armature shaft. The plastic is molded in only on a first face of the stack and flows into the grooves and through the ducts. The plastic invades the grooves also from the second face after being discharged from the ducts and converges with the plastic discharged from the first face. The method implements fixing and insulation of the grooves while the groove insulation is provided with a minimum layer thickness for such sheathings at the bottom thereof in order to allow for maximum copper fillings.

Abstract: A method of forming a power tool includes forming and balancing an armature by securing a lamination stack having slots therein on an armature shaft securing a commutator on one end of the armature shaft, winding magnet wires in the slots in the lamination stack and securing ends of the magnet wires to the commutator, and molding plastic to at least partially encase the magnet wires in plastic and forming a balancing feature. Plastic is removed from the balancing feature during dynamic balancing of the armature. The armature is then disposed in a stator to form an electric motor and the electric motor is disposed in a power tool.

Abstract: A method of manufacturing a power tool includes forming an armature by placing an electrically insulative sleeve on an armature shaft, securing a lamination stack having slots therein on the armature shaft with the insulative sleeve disposed therebetween, securing a commutator on one end of the armature shaft with the insulative sleeve disposed therebetween, winding magnet wires in the slots in the lamination stack and securing ends of the magnet wires to the commutator, and molding thermally conductive plastic to at least partially encase the magnet wires in plastic. The armature is then disposed in a stator to form an electric motor and the electric motor is disposed in a power tool. In an aspect, electrically insulative plastic is molded in the slots of the lamination stack to form slot liners and around the ends of the lamination stack to form end spiders.

Abstract: A method of making an armature includes placing a commutator and a lamination stack on an armature stack. Coil windings wound in slots in the lamination stack, the commutator and armature shaft are at least partially encapsulated in a first plastic. The commutator has a commutator ring divided into a plurality of segments with slots between the segments that are filled with a second plastic when the commutator is made by molding a core of the second plastic in the commutator ring before the commutator ring is mounted on the armature shaft. The mold used to mold the first plastic includes projections that extend between the tangs of the commutator and against notches at axial ends of the slots of the commutator. The notches filled with the second plastic and the projections of the mold prevent plastic flash from getting into the slots of the commutator ring.

Abstract: A method is provided for manufacturing a stator of an electrical rotating machine. The method includes: impregnating a first winding head with a first composition that includes a heat-setting resin and a filler of a first particle size; impregnating conductive wires in a slot region with a slot-impregnating composition that includes a heat-setting resin and another filler of a second particle size smaller than the first particle size of the filler of the first composition; and impregnating a second winding head with a composition that includes a heat-setting resin and a filler of a particle size larger than the second particle size.

Abstract: A permanent magnet rotor assembly includes a rotor and a plurality of permanent magnet pole assemblies positioned against the rotor. Each of the permanent magnet pole assemblies includes a magnetic block and an encapsulating member that completely encapsulates the magnetic block.

Abstract: The present invention provides for a method of impregnating a matrix with a high thermal conductivity filled resin 32, which produces a resin impregnated matrix. The high thermal conductivity material 30 comprises 5-60% by volume of the resin 32. This is compressed by approximately 5-30%, and the distances between the high thermal conductivity materials loaded in the resin are reduced, and the resin is then cured.

Abstract: An encoder includes a rotor including: a shaft and a code disk attached to the shaft; a stator including a scanning unit configured to generate an electrical signal corresponding to an angular position of the code disk; a cable configured to transfer the electrical signal; and a cover overmolded onto the stator, where the scanning unit is sealed from an outer environment by the cover.

Abstract: A data storage device is made by molding a portion of a motor into a first enclosure member, and then coupling the first enclosure member to a second enclosure member to define an interior environment for other data storage device components.

Abstract: A method for sealing an electrical connector having a transition end and a cable. A protective coating is applied to the transition end of the connector. The connector, transition end and cable are positioned within halves of a mold. An annular resilient seal is positioned about the transition end within the mold. When the mold is filed with castable material the annular resilient seal compresses against the connector, preventing leakage of the castable material along the connector. The mold can then be separated leaving a waterproof boot formed on the transition end of the connector. The invention also provides a mold and sealing means for this process.

Abstract: At least a winding of a stator stack 2 is molded by injecting a fused resin molding material into a space formed between a top mold and a bottom mold member. When the stator stack 2 of the resolver, which is annular and includes a coiled winding 7, is sandwiched between the top mold member 10 and bottom mold member 20, a movable disc 12 is urged by a spring device 13, into close engagement with the bottom mold member 20. While the movable disc 12 is closely engaged with the bottom mold member 20, the stack 2 of the resolver is sandwiched between the bottom mold member 20 and the top mold member 10. This method prevents the generation of gaps between the stator stack 2 and mold 10, 20 due to unevenness of the thickness in the stator stack 2.

Abstract: In a method for manufacturing an electric motor, a cylindrical stator core circumferentially dividable into a plurality of core components is inserted into a circular internal surface of a motor housing. In this case, the motor housing is heated to be expanded thermally thereby enlarge circular internal surface thereof. Then, the stator core is fit over the external surface of an, insertion guide head of a generally cylindrical shape, and the insertion guide head is moved ward toward the thermally expanded motor housing secured on a fixed table to insert the stator re inside the motor housing. When the insertion guide head reaches a predetermined axial position inside the motor housing, a pressing mechanism incorporated in the insertion guide head is operated to press the core components on the circular internal surface of the motor using.

Abstract: An apparatus and method of forming a resin film on a surface of a stator core including a ring-shaped yoke portion, a plurality of teeth each protruding from the yoke portion in a radial direction, and a plurality of slots formed between the teeth, including forming the resin film on a section of the stator core by molding a synthetic resin material onto a surface of the section and repeating the molding on another section of the stator core so as to form the resin film on a whole periphery of the stator core, wherein the stator core is divided into a plurality of sections with respect to an axial center thereof.

Abstract: A process for manufacturing an inductive component intended to be installed on a printed circuit involves initially winding an electrically conductive wire to form a winding without using a former end connecting the opposed ends of the winding to inner ends of connecting terminals. The body formed of a block of an insulating material is then over-moulded onto the coil and onto the inner ends of the connecting terminals with the body including a central opening that passes through the body along the axis of the coil. Finally, a core made of ferrite is placed on the body such that the core surrounds the body in a center plane containing the axis of the coil with a center core element passing through the opening in the body.

Abstract: In a method of manufacturing a rotor of an electric motor to be arranged inside a stator, a permanent magnet is formed in a ring-shape, and a rotating shaft and the permanent magnet are concentrically arranged in a mold. Then, a rubber material in a fluid state is poured into a space between the permanent magnet and the rotating shaft to vulcanize and mold a cushioning member having predetermined hardness. The permanent magnet and the rotating shaft are integrally coupled through the cushioning member.

Abstract: Magnet wires wound in slots in a lamination stack of a dynamoelectric machine are encapsulated, in whole or in part, with plastic. The plastic may be thermally conductive and have features molded therein that enhance heat transfer. The plastic may stiffen the armature and increase its critical speed. Characteristics of the plastic, its geometry and its distribution may be varied to adjust spinning inertia and resonant frequency of the armature. The magnet wires may be compressed into the slots, by application of iso-static pressure or by the pressure of the plastic being molded around them. Larger magnet wire can then be used which increases the power of the electric motor using the armature having the larger magnet wire. A two or three plate mold may be used to mold the plastic around the armature. Balancing features can be molded in place. The plastic can have a base polymer that is a blend of two or more polymers and various thermally conductive fillings.

Abstract: A method for making a stator assembly having a thermally-conductive, plastic housing for a high speed motor is provided. A thermally-conductive, high-density polymer composition is used to make the housing, and the stator is uniformly encapsulated therein. The polymer composition comprises a base polymer matrix such as polyphenylene sulfide, and a thermally-conductive, high-density filler material such as zinc oxide.

Abstract: A disk drive includes an enclosure that defines an exterior surface, the enclosure including a base, a cover and a hinge mechanically coupling the base to the cover such that the hinge forms a portion of the exterior surface of the enclosure. A spindle motor is attached to the base, a disk is mounted to the spindle motor, and a head stack assembly is pivotally coupled to the base. A method of manufacturing a disk drive includes a single molding step to form an enclosure including the base, the cover and a hinge that mechanically couples the base to the cover such that the hinge forms a portion of the exterior surface of the enclosure. The spindle motor may then be attached to the base, the disk or disks mounted to the spindle motor and the head stack assembly may be pivotally coupled to the base.

Abstract: A process for preparing an over molded motor stator structure comprises constructing a bobbin assembly; constructing an intermediate stator assembly including assembling the bobbin assembly to a stator core having an internal and external diameter; disposing the intermediate stator assembly into a mold fixture comprising a cover half and an ejector half that includes an inner ejector core and a moveable plate; loading a bearing carrier into the mold fixture; closing the cover half causing the moveable plate to travel within the mold; injecting a unitizing material into the mold fixture to encapsulate the intermediate stator assembly and form an over molded motor stator structure. The moveable plate travels within the mold fixture so as prevent coating of the stator laminations external diameter. A tight tolerance relationship between the inner ejector core and the stator lamination inner diameter prevents the internal diameter from being encapsulated by the unitizing material.

Abstract: A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by injection molding. The pressure of the overmold material as it is being molded expands the flux ring pressing the flux ring into engagement with the stator housing. The overmold material secures the magnets to the flux ring and the flux ring to the housing. One of the flux ring and stator housing has a dimple that engages a hole in the other of the flux ring and stator housing to align the flux ring and stator housing. In an aspect, the overmold material is molded to form at least one of a commutator end or rear bearing support, front bearing support and fan baffle. In an aspect, the overmold material is molded to form a keying feature. The keying feature can be slots of different widths between magnetic poles of the stator assembly.

Abstract: An electromagnetic oscillating type pump for oscillating diaphragms connected to an oscillator through electromagnetic oscillation of the oscillator with magnetic body by utilizing magnetic interaction between an electromagnetic portion comprising one or a plurality of iron cores and the magnetic body. A frame portion of resin mold is formed by molding resin on an outer surface of the electromagnetic portion. It is possible to obtain electromagnetic oscillating type pumps capable of decreasing manufacturing costs and of exhibiting high acoustic insulating effects.

Abstract: A method for injection molding a layer of phase change material around a surface of a plurality of identical motor components or hard disc drive components which includes providing a plurality of motor components or hard disc drive components; placing a motor component or hard disc drive component in a mold cavity of an injection molding machine having a controllable fill rate and a controllable injection pressure; closing said mold cavity; injecting a molten phase change material into said mold cavity at a fill rate and injection pressure; monitoring pressure in the mold cavity; controlling the fill rate of molten phase change material to obtain said motor component or hard disc drive component with the phase change material thereon, having a reproducible resonance spectrum; and repeating the above steps to produce a plurality of motor components or hard disc drive components each having a substantially uniform resonance spectrum.

Abstract: A method of producing a rotor positions a shaft in one of a first mold portion and a second mold portion, and positions a cup in one of the first mold portion and the second mold portion. The first and second mold portions are then mated to form a chamber. Molding material is injected into the chamber to produce a molded part that includes the cup and the shaft. The molded part has a part axis that substantially parallel with the part axis.

Abstract: A high voltage transformer for a microwave oven includes a core, and primary and secondary coils. An insulation molding part encloses at least a part of the secondary coil and has a sensor accommodation portion formed therein. A temperature sensor is accommodated in the sensor accommodating portion for detecting temperature of the secondary coil. The sensor accommodating portion can be formed inside of the insulation molding part together with the temperature sensor, or formed outside of the insulation molding part in a pocket shape. With either configuration, the temperature sensor can be positioned at the correct sensor position, thereby improving the detecting accuracy of the temperature sensor. In addition, it is easy to repair and/or replace the temperature sensor.

Abstract: An apparatus and method of forming a resin film on a surface of a stator core including a ring-shaped yoke portion, a plurality of teeth each protruding from the yoke portion in a radial direction, and a plurality of slots formed between the teeth, including forming the resin film on a section of the stator core by molding a synthetic resin material onto a surface of the section and repeating the molding on another section of the stator core so as to form the resin film on a whole periphery of the stator core, wherein the stator core is divided into a plurality of sections with respect to an axial center thereof.

Abstract: The method serves for manufacturing a canned rotor of a permanent magnet motor. Firstly a shaft (2) provided with a rotor core [rotor laminated sheet package] (3) together with a pre-blank (11) forming the later magnet and a [sheet] metal casing (6) surrounding the pre-blank is applied with play into a pressing tool (12). The pre-blank (11) is then deformed by way of end-face pressure impingement such that it then bears with a non-positive fit and over the whole surface on the rotor core [rotor laminated sheet package] (3) and on the [sheet] metal casing (6), wherein the casing (6) is widened radially until its bearing on the pressing tool (12) by way of the radially widening pre-blank (11).

Abstract: A process for preparing an over molded motor stator structure comprises constructing a bobbin assembly; constructing an intermediate stator assembly including assembling the bobbin assembly to a stator core having an internal and external diameter; disposing the intermediate stator assembly into a mold fixture comprising a cover half and an ejector half that includes an inner ejector core and a moveable plate; loading a bearing carrier into the mold fixture; closing the cover half causing the moveable plate to travel within the mold; injecting a unitizing material into the mold fixture to encapsulate the intermediate stator assembly and form an over molded motor stator structure. The moveable plate travels within the mold fixture so as prevent coating of the stator laminations external diameter. A tight tolerance relationship between the inner ejector core and the stator lamination inner diameter prevents the internal diameter from being encapsulated by the unitizing material.

Abstract: Discussed are rational, economical production methods for inductive components. Compared to prior methods, those addressed herein are significantly simplified processes in which exact positioning of the connections is possible. Among actions contemplated in exemplary versions of the method are providing a mold comprised of aluminum alloy, inserting a magnet core of the inductive component, and filling the closed mold with a molten hot-melt adhesive preferably comprising a polyamide base.

Abstract: A method for making a dynamoelectric machine conductor bar, compromises providing a plurality of bundled together spiraling strand conductors having surrounding insulation to define a substantially rectangular shape with the strand conductors and strand insulation defining an opposing conductor bar end portion having an electrically insulated gap between the strand insulation adjacent the bar end portion; and applying a filler material to fill the gap to electrically shield the conductor bar end portion and to a greater than 0.080 to about 1.5 inch continuous outer radius surface end portion.

Abstract: A method of forming a winding support structure for use with a superconducting rotor wherein the method comprises providing an inner support ring, arranging an outer support ring around the inner support ring, coupling first and second support blocks to the outer support ring and coupling a lamination to the first and second support blocks. A slot is defined between the support blocks and between the outer support ring and the lamination to receive a portion of a winding. An RTV fills any clearance space in the slot.

Abstract: A method for making a carbon commutator assembly by forming an annular carbon cylinder of a conductive carbon composition and metalizing an inner surface of the carbon cylinder by bonding a first layer of metallic material to the inner surface of the carbon cylinder. A metallic substrate is soldered to the metalized inner surface of the carbon cylinder and an insulator hub is disposed in a position supporting the metallic substrate and carbon cylinder. The carbon cylinder and substrate are then segmented by forming radial interstices through the carbon cylinder and the metallic substrate thus forming a carbon/metal commutator array comprising electrically isolated carbon/metal commutator sectors.

Abstract: The method of manufacturing a sheet stack for electromagnetic assemblies, consisting of ferromagnetic material, includes forming the sheet stack from raw magnetic steel sheets in a shaping tool without the use of spacers, if necessary with the help of positioning aids, and simultaneously introducing a hardenable mixture into the shaping tool in order to totally surround the sheet stack and to form an anti-corrosion layer and hardening or hardening out this casting compound according to the pressure-gelating method to connect the sheets together and to form the finished sheet stack in one single working step.

Abstract: A stepping motor having a rotor consisting of a permanent magnet magnetized such that N poles and S poles are alternately arranged in the hoop direction, stator cores with pole teeth oppositely disposed on the outer peripheral surface of the rotor, and a coil bobbin integrally containing the stator cores as the result of resin molding and being used for supporting a coil wound thereon. In the stepping motor, holes are formed in the coil bobbin, and the holes range from an outer wall of the coil bobbin to the outer peripheral surfaces of the pole teeth. In the stage of resin molding, the dies are brought into contact with the pole teeth by the utilization of the holes, thereby preventing the pole teeth from being declined in the radial direction, and securing a satisfactory rigidity of the coil bobbin.

Abstract: The method provides an electromagnetic assembly in the form of a magnet pole or of a stator packet of an extended stator linear motor for a magnetic levitation train. The assembly includes a sheet stack (8) made of ferromagnetic material and at least one additional component (12,13,14). The sheet stack (8) is assembled from raw magnetic steel sheets and is positioned in a shaping tool. Thereafter by feeding a hardenable mixture into the tool and hardening or hardening out the mixture, the sheets are surrounded with the mixture and connected to each other in a single working step to form the finished sheet stack. In the same working step, the sheet stack (8) is connected to the additional component (12,13,14) and the assembly as a whole is provided with its final electrical, magnetic, mechanical and/or geometric properties.

Abstract: A stator structure of a reciprocating motor is provided. In the stator structure of a reciprocating motor, a bobbin around a coil is wound; a plurality of unit stacked core members of a predetermined thickness, each of which is formed by stacking a plurality of lamination sheets formed of predetermined shaped thin plates, and radially positioned on the outer circumference of the bobbin; and an injection insulator combining the plurality of unit stacked bobbins to an outer circumference of the bobbin. Accordingly, it is possible to reduce the number of parts that form the stator and to simplify the structure of the stator. Therefore, it is possible to reduce the time required for assembling the parts and reduce the processes of assembling the parts, to thus improve assembly productivity.

Abstract: A method for producing a monolithic, seamless, polymeric housing structure for a micromachine uses a stereolithographic method to produce the structure layer by layer by exposing sequentially formed films of photopolymer to a beam of electromagnetic radiation scanned over patterns of locations corresponding to at least partially superimposed layers of the housing structure. The housing structure may include openings through which movable elements such as shafts and linkages may extend, and may provide sealed passage for electrical conductors therethrough from the micromachine to the exterior of the housing structure. Complex housing structures including closed or almost closed chambers and interior partition walls as well as interior passages of complex configuration may be formed to accommodate individual components or component assemblies.

Abstract: A method for making a wire-wound rotating part for an electrically driven machine, wherein a sheet metal pack and a commutator spaced therefrom are attached to a shaft, and conductive strands are wound around the sheet pack and the commutator to form a generally ring shaped winding. The method further comprises axially compressing the winding and simultaneously moving the commutator closer to the sheet pack. The method is particularly useful for making electric fans for motor vehicles.

Abstract: A method of securing a stator winding such that it has improved heat dissipation performance includes steps of inserting a stator winding into a stator core soaking these components in a varnish tank while being held together as one, and after the varnish has soaked into the stator winding 15, withdrawing the winding and core from the varnish tank. Then a mandrel comprising an outer peripheral pressing portion made by wrapping a fluororubber around an outer periphery of a mandrel body made of a fluoroplastic, is inserted into the stator winding. After this, the varnish is heat hardened with the stator core, the stator winding, and the mandrel 33 all held together as one. In so doing, the outer peripheral pressing portion is deformed with irregularities replicating the inner periphery of the stator winding 15. Hence on the inner peripheral side of the stator winding, the varnish resin hardens with the irregularities retained.

Abstract: In a process for fixing a rotor winding (15), which is hooked to connection lugs (122) of commutator lamellas (121) of a commutator (12) in the vicinity between the connection lugs (122) and winding heads (151) that are embodied on the end face of the rotor body (11), in order to simplify the process, a shrink sleeve (16) is placed over the commutator (12) of the completed rotor (10) and is slid onto the winding heads (151) until the connection lugs (122) and the connection wires (152) of the rotor winding (15) that extend to the connection lugs (122) are covered. The mechanically fixed shrink sleeve (16) is homogeneously heated with hot air while the rotor (10) rotates so that after cooling, it shrinks onto the connection lugs (122) and connection wires (152) as well as onto parts of the winding heads (151).

Abstract: A process for fixing a rotor winding, which is hooked to connection lugs of commutator lamellas of a commutator in the vicinity between the connection lugs and winding heads that are embodied on the end face of the rotor body. In order to simplify the process, a shrink sleeve is placed over the commutator of the completed rotor and is slid onto the winding heads until the connection lugs and the connection wires of the rotor winding that extend to the connection lugs are covered. The mechanically fixed shrink sleeve is homogeneously heated with hot air while the rotor rotates so that after cooling, the shrink sleeve shrinks onto the connection lugs and connection wires as well as onto parts of the winding heads.

Abstract: A method of making a rotor for an electric motor includes accommodating, in a forming mold, a plurality of annularly disposed rotor magnets, a frame made of steel plate and formed generally into a shape of a cup, the frame having an annular wall disposed outside the annularly disposed rotor magnets so as to be located at a side opposed to a stator with respect to the rotor magnets, the annular wall having a open end, and a ring member made of a magnet material and disposed along the annular wall of the frame at an inner or outer circumferential side of the annular wall, the rotor magnets being held by magnet holding means provided in the forming mold in execution of the accommodating step, and pouring a molten resin into the forming mold accommodating the rotor magnets, the frame and the ring member and hardening the resin.

Abstract: An improved method for creating cooling ducts in cast resin coils uses uniform cross section thermoplastic tooling segments. These segments are wound into windings between predetermined layers or radial sections, oriented parallel to the coil axis. They extend through the height of the coil. After the coil is cast, impregnated, or saturated with resin, and the resin is cured, the segments are withdrawn. The removal of a segment results in a continuous cooling duct. The thermoplastic segments are either solid machined from sheet or extruded with thin outer walls. Extrusion allows for uniform cross section relatively long somewhat flexible segments, which will cause the radius of curvature of the segment to conform to the shape of the coil due to the tension from the conductor and reinforcing material during the winding process. This will have the result of reducing the number of different segment designs required to support production of a variety of different diameter coils.

Abstract: A high speed spindle motor is constructed from a stator assembly that includes a stator having multiple conductors that create a plurality of magnetic fields when electrical current is conducted by the conductors and a body of a phase change material, such as a thermoplastic, substantially encapsulating the stator. A rotatable hub having a magnet connected thereto is in operable proximity to the stator. The high speed motor also includes a shaft, a bearing surrounding the shaft and one of the bearing or shaft being fixed to the stator assembly and the other of the bearing or shaft being fixed to the rotatable hub. Hard disc drives using the motor, and methods of developing and constructing the motor and hard disc drives are also disclosed.

Abstract: A method for forming a resin molding on a coil of a transformer is disclosed. The method comprises the steps of inserting a coil into an auxiliary spacing apparatus, inserting the auxiliary spacing apparatus into a mold, and forming a resin molding for the auxiliary spacing apparatus with the coil by putting a resin into the mold. According to the methods, the coil is not damaged and a resin molding is formed with an uniform thickness.

Abstract: A molding composition containing an unsaturated alkyd resin and an unsaturated polyester containing a crosslinking monomer, which may be 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate. A molded part is manufactured by (a) covering the surrounding of a stator part having a heat generating coil with the molding composition, (b) feeding power to the coil for generating heat in the stator part, and (c) curing the molding composition by the heat generated in the stator part. The curing time is shortened, the molding cycle is improved, and, as a result, a molding composition excellent in productivity is presented, and by using this molding composition, molded parts are manufactured at excellent productivity.

Abstract: Discussed are rational, economical production methods for inductive components. Compared to prior methods, those addressed herein are significantly simplified processes in which exact positioning of the connections is possible. Among actions contemplated in exemplary versions of the method are providing a mold comprised of aluminum alloy, inserting a magnet core of the inductive component, and filling the closed mold with a molten hot-melt adhesive preferably comprising a polyamide base.