Abstract: The present invention advantageously provides a cost effective flat rotor for a pancake type slip ring. A flat copper coil sheet is stamped into a corrugated shape having concentric V-ring grooves. The corrugated stamped copper foil sheet is bonded using a bonding agent to a dielectric layer. Multiple concentric V-grooves are formed by separating the grooves, for example, by machining the grooves at an apex thereof in order to form separate electrical circuits. A corresponding plurality of holes extend through each concentric ring and through the dielectric layer from the first side through the second side. A conductive material is placed in each of the plurality of holes to electrically connect each concentric ring to the second side.

Abstract: Methods and apparatus are provided for wire winding and fabrication for dynamo-electric machine components such as ferromagnetic armature or stator cores for motors or the like. Wire may be wound onto individual portions of dynamo-electric machine components, which may then be assembled to form complete components. Wire may be wound by steering a rotating flyer or the like in a trajectory that closely follows the surface of the core onto which the wire is being wound. Wire may also be wound by rotating the portions during winding. The same holding members that are used to hold the portions during winding may be used to hold the portions during assembly of the portions into machine components.

Abstract: A hydroformed tubular structure includes at least two hydroformed members connected at a joint. At least one of said members includes a flattened portion having opposite sides in engagement. One of the sides engages and is secured to a mating portion of another of the members and a hydroformed conjugate portion is formed in the one side adjacent the flattened portion and is secured in a recess of the other member. A hydroformed structural portion extends from the conjugate portion in a direction away from the flattened portion.

Abstract: The object of the present invention is to provide a method and an apparatus for manufacturing a stator to improve accuracy in inserting conductor segments (3, 31, 32) into slots (2). The apparatus according to the present invention comprises a conductor holder (21, 22) holding the conductor segments (3, 31, 32) and an axial-moving-mechanisms (214) moving the conductor holder (21, 22) relative to a stator core (1) in an axial direction. The conductor holder (21, 22) holds straight portions (31b, 31c, 32b, 32c) of the conductor segments (3, 31, 32) to be inserted into the slots (2) from one end of the stator core (1).

Abstract: An rotor assembly 10 for use with an electrical machine. Assembly 10 includes two opposing and selectively intermeshing pole pieces 12, 14. Each pole piece 12, 14 has a body 16 and a plurality of integrally formed and outwardly extending projections or pole fingers 18. A plurality of magnets 34 are each fixedly secured, by use of swaged portions 36, within a unique one of several slots 38 which are cooperatively formed between a unique one of fingers 18 and a unique portion of body 16 of pole pieces 12, 14.

Abstract: Radial pressure is applied to a turbine generator armature bar using a simple hand held device that can be readily manipulated by a single human operator. A retainer platform has two wedge shaped portions with handles, and by the operator sliding the wedge shaped portions with respect to each other the operative width of the platform may be adjusted, including to slide and lock the platform in a conventional dovetail slot in a stator. An inflatable bladder is positioned on or mounted to the top surface of the platform and is dimensioned so as to apply radial pressure (for example through a filler) to armature bars mounted in the stator. A conduit, preferably having a valve with quick-release actuator in it, extends from the inflatable bladder and connects to a source of gas under pressure.

Abstract: A motor stator is constructed from loose laminations which are aligned and secured to the compressor housing at the time of assembling the compressor unit. The loose lamination stator is first attached to the compressor housing to initially locate the stator. A solid sizing mandrel is pushed through the rotor accommodating bore to remove any burrs and initially size the bore. An expanding mandrel is then positioned within the rotor accommodating bore and expanded to finalize the sizing of the bore and the alignment with the compressor housing. Once the final size and alignment have been achieved, the stator is secured to the motor housing.

Abstract: A method of manufacturing a recording head having a bottom pole layer and a top pole layer that include pole portions opposed to each other, a recording gap layer being placed between the pole portions. The top pole layer is made up of a pole portion layer, a magnetic layer and a yoke portion layer. The recording head further has an insulating layer for defining a throat height placed between the pole layers, and a thin-film coil placed between the pole layers, the coil being insulated from the pole layers. The pole portion layer is formed through the following procedure. A magnetic film is formed on a surface having a step caused by the insulating layer. The top surface of the magnetic film is flattened. The magnetic film thus flattened is patterned through photolithography.

Abstract: A method of producing plural device chips from a thin plate of a pyroelectric material comprises the following steps. First, plural device-forming regions each having an electrode and a circuit pattern for electrically connecting the electrodes are formed on each of front and rear surfaces of the thin plate to obtain a device substrate. By making an electrical connection between the circuit patterns, and grounding it, all of the device-forming regions on the device substrate are at the same potential. Next, a blast treatment is performed to the device substrate to remove a required region of the pyroelectric material, while leaving a bridge portion extending between adjacent device-forming regions and having the circuit patterns thereon, so that a device-chip aggregate is formed, in which adjacent device chips are coupled through the bridge portion. Subsequently, by removing the bridge portion, the device chip is separated from the device-chip aggregate.

Abstract: A manufacturing method of a slotless stator, involves assembling jointly define two divided cores which a stator core into a cylindrical shape, so as to contain therebetween a cylindrically shaped stator winding, wherein the stator winding an outer diameter larger than an inner diameter of the stator core in the uncompressed condition. By so doing, the stator winding is assembled inside the stator core in a radially inward compressed condition. At this time, since the stator winding functions as a spring pressing the inside of the stator core so as to expand in the normal direction (the radial outward direction), winding is mechanically secured by the resilient spring force at that time to the inner periphery of the stator core. Hence there is no longer the need for a special fixation mechanism or adhesive when assembling the stator core winding and stator core together.

Abstract: The present invention provides internally damped stators, rotors, and transformers; internally damped cores from which they may be made; and a method of making the aforementioned.

Abstract: In a method of mounting a drive motor to a frame member included in a disk drive which is for driving a flexible disk, the frame member is formed to have a main frame portion and a motor frame portion integrally formed to the main frame portion. The main frame portion defines a position of the flexible disk in the disk drive. Use is made of a jig adapted to engage with the main frame portion and a bearing portion provided to a stator of the drive motor. On positioning the stator relative to the motor frame portion, the jig is engaged with the main frame portion and the bearing portion. Under this state, the stator is fixed to the motor frame portion. After that, the bearing portion rotatably supports a rotation shaft coupled to a rotor of the drive motor.

Abstract: A method of the present invention for manufacturing a small-sized motor relates to cutting or grinding of a shaft end portion of a rotor into a noncircular shape over a predetermined length for establishing a mechanical coupling with a device to be driven. The cutting or grinding work is performed after a laminated core 7, a winding 6, a commutator 5, and a thrust bush 8 are assembled on a shaft 11 to thereby assemble the rotor. Alternatively, a process of cutting or grinding the shaft end portion into a noncircular shape is performed after a casing 1, an end bell 4 to be fitted to an opening portion of the casing 1, and a rotor are assembled into a small-sized motor.

Abstract: A winding on a stator of a rotary electric machine is constructed by welding end portions of a plurality of segments. A plurality of pairs arranged on an end of the stator are welded by a welder. In a welding stage, the pairs are held by a plurality of insertion rods of a circumferential side holding tool. The insertion rods are radially disposed. The insertion rods are movable in a radial direction. The insertion rods are moved back toward a radial outside to release a holding of the pairs after ball-shaped welding marks are formed. Holding is released without damage on the welding mark.

Abstract: Methods and apparatus are disclosed for assembling an electric machine. The electric machine includes a plurality of stator segment assemblies that are mounted inside of a housing of an electric machine. The stator segment assemblies are positioned around an outer surface of an assembly fixture. The stator segment assemblies are held to the assembly fixture using a magnetic field that is generated by the assembly fixture. The housing is press fit or hot dropped over the stator segment assemblies. If the housing is hot dropped, the housing is heated to cause the housing to expand. The housing is positioned over the stator segment assemblies while the housing is hot. The housing cools and contracts around the stator segment assemblies to form an interference fit with the stator segment assemblies and then the stator and the housing are removed from the assembly fixture.

Abstract: Rotors or stators of this kind are cut out from rolled sheet metal with a predominant magnetic direction and are stacked to form a rotor or stator lamination bundle. In order to largely compensate for a magnetic anisotropy of the rotor or stator lamination packet, when the sheet metal blanks are asymmetrical (A, B), they are cut out from the rolled sheet metal rotated in relation to one another with regard to the predominant magnetic direction. The process according to the invention can be used for electric machine rotors or stators comprised of sheet metal blanks.

Abstract: A progressive stamping die assembly apparatus and method in which strip stock material advances in a first direction through the apparatus and substantially simultaneously with the strip stock movement, a transversely moveable die station moves in opposite second and third directions substantially perpendicular to the first direction to one of a plurality of predetermined positions.

Abstract: In the described device a wire (18), which is fed in by a wire guide (20), is wound on a shaping body (10) provided with recesses (16), of a rotatably driveable template (10, 12) and, in the course of the rotation of the latter, is cyclically pushed into the recesses (16) by radially movable outer shaping elements (12). Subsequently the wave-shaped wire windings are transferred into longitudinal slits of a coil receiver (34), which is positioned axially in front of the shaping body (10) and is essentially maintained fixed against relative rotation during the winding movement. In order to obtain complete wave windings over the circumference in a simple manner, it is provided that the shaping of the end of the last winding of a wave winding is finished in the allocated recess (16) by means of an additional inward movement of at least one of the shaping elements (12) in a different angle of rotation position of the template (10, 12) than during the cyclically performed shaping movement.

Abstract: A thin metal sheet is laminated to form in advance a plurality of core units (of a circular cylinder shape) having the thickness of 1/N (N is a natural number of more than 2) of a predetermined thickness in the laminating direction and this plurality of core units is laminated again for securing so that the whole stator does not cause any mode of oscillation in the diametric direction.